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Merge branch '1.11' into 1.12 

Conflicts:
	paramiko/hostkeys.py
This commit is contained in:
Jeff Forcier 2014-03-04 11:44:57 -08:00
parent 0965eaa65d 72a73f55fa
commit fac6cde874
52 changed files with 2227 additions and 2485 deletions
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39
fabfile.py vendored
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@ -1,39 +0,0 @@
from fabric.api import task, sudo, env, local, hosts
from fabric.contrib.project import rsync_project
from fabric.contrib.console import confirm
@task
@hosts("paramiko.org")
def upload_docs():
target = "/var/www/paramiko.org"
staging = "/tmp/paramiko_docs"
sudo("mkdir -p %s" % staging)
sudo("chown -R %s %s" % (env.user, staging))
sudo("rm -rf %s/*" % target)
rsync_project(local_dir='docs/', remote_dir=staging, delete=True)
sudo("cp -R %s/* %s/" % (staging, target))
@task
def build_docs():
local("epydoc --no-private -o docs/ paramiko")
@task
def clean():
local("rm -rf build dist docs")
local("rm -f MANIFEST *.log demos/*.log")
local("rm -f paramiko/*.pyc")
local("rm -f test.log")
local("rm -rf paramiko.egg-info")
@task
def test():
local("python ./test.py")
@task
def release():
confirm("Only hit Enter if you remembered to update the version!")
confirm("Also, did you remember to tag your release?")
build_docs()
local("python setup.py sdist register upload")
upload_docs()

43
paramiko/__init__.py
View File

@ -16,44 +16,10 @@
# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
I{Paramiko} (a combination of the esperanto words for "paranoid" and "friend")
is a module for python 2.5 or greater that implements the SSH2 protocol for
secure (encrypted and authenticated) connections to remote machines. Unlike
SSL (aka TLS), the SSH2 protocol does not require hierarchical certificates
signed by a powerful central authority. You may know SSH2 as the protocol that
replaced C{telnet} and C{rsh} for secure access to remote shells, but the
protocol also includes the ability to open arbitrary channels to remote
services across an encrypted tunnel. (This is how C{sftp} works, for example.)
The high-level client API starts with creation of an L{SSHClient} object.
For more direct control, pass a socket (or socket-like object) to a
L{Transport}, and use L{start_server <Transport.start_server>} or
L{start_client <Transport.start_client>} to negoatite
with the remote host as either a server or client. As a client, you are
responsible for authenticating using a password or private key, and checking
the server's host key. I{(Key signature and verification is done by paramiko,
but you will need to provide private keys and check that the content of a
public key matches what you expected to see.)} As a server, you are
responsible for deciding which users, passwords, and keys to allow, and what
kind of channels to allow.
Once you have finished, either side may request flow-controlled L{Channel}s to
the other side, which are python objects that act like sockets, but send and
receive data over the encrypted session.
Paramiko is written entirely in python (no C or platform-dependent code) and is
released under the GNU Lesser General Public License (LGPL).
Website: U{https://github.com/paramiko/paramiko/}
Mailing list: U{paramiko@librelist.com<mailto:paramiko@librelist.com>}
"""
import sys
if sys.version_info < (2, 5):
raise RuntimeError('You need python 2.5+ for this module.')
raise RuntimeError('You need Python 2.5+ for this module.')
__author__ = "Jeff Forcier <jeff@bitprophet.org>"
@ -89,13 +55,6 @@ from hostkeys import HostKeys
from config import SSHConfig
from proxy import ProxyCommand
# fix module names for epydoc
for c in locals().values():
if issubclass(type(c), type) or type(c).__name__ == 'classobj':
# classobj for exceptions :/
c.__module__ = __name__
del c
from common import AUTH_SUCCESSFUL, AUTH_PARTIALLY_SUCCESSFUL, AUTH_FAILED, \
OPEN_SUCCEEDED, OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED, OPEN_FAILED_CONNECT_FAILED, \
OPEN_FAILED_UNKNOWN_CHANNEL_TYPE, OPEN_FAILED_RESOURCE_SHORTAGE

82
paramiko/agent.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
SSH Agent interface for Unix clients.
SSH Agent interface
"""
import os
@ -40,17 +40,8 @@ from paramiko.util import retry_on_signal
SSH2_AGENTC_REQUEST_IDENTITIES, SSH2_AGENT_IDENTITIES_ANSWER, \
SSH2_AGENTC_SIGN_REQUEST, SSH2_AGENT_SIGN_RESPONSE = range(11, 15)
class AgentSSH(object):
"""
Client interface for using private keys from an SSH agent running on the
local machine. If an SSH agent is running, this class can be used to
connect to it and retreive L{PKey} objects which can be used when
attempting to authenticate to remote SSH servers.
Because the SSH agent protocol uses environment variables and unix-domain
sockets, this probably doesn't work on Windows. It does work on most
posix platforms though (Linux and MacOS X, for example).
"""
class AgentSSH(object):
def __init__(self):
self._conn = None
self._keys = ()
@ -61,8 +52,9 @@ class AgentSSH(object):
no SSH agent was running (or it couldn't be contacted), an empty list
will be returned.
@return: a list of keys available on the SSH agent
@rtype: tuple of L{AgentKey}
:return:
a tuple of `.AgentKey` objects representing keys available on the
SSH agent
"""
return self._keys
@ -100,8 +92,11 @@ class AgentSSH(object):
result += extra
return result
class AgentProxyThread(threading.Thread):
""" Class in charge of communication between two chan """
"""
Class in charge of communication between two channels.
"""
def __init__(self, agent):
threading.Thread.__init__(self, target=self.run)
self._agent = agent
@ -146,6 +141,7 @@ class AgentProxyThread(threading.Thread):
self.__inr.close()
self._agent._conn.close()
class AgentLocalProxy(AgentProxyThread):
"""
Class to be used when wanting to ask a local SSH Agent being
@ -155,8 +151,10 @@ class AgentLocalProxy(AgentProxyThread):
AgentProxyThread.__init__(self, agent)
def get_connection(self):
""" Return a pair of socket object and string address
May Block !
"""
Return a pair of socket object and string address.
May block!
"""
conn = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
try:
@ -168,6 +166,7 @@ class AgentLocalProxy(AgentProxyThread):
raise
return None
class AgentRemoteProxy(AgentProxyThread):
"""
Class to be used when wanting to ask a remote SSH Agent
@ -177,22 +176,20 @@ class AgentRemoteProxy(AgentProxyThread):
self.__chan = chan
def get_connection(self):
"""
Class to be used when wanting to ask a local SSH Agent being
asked from a remote fake agent (so use a unix socket for ex.)
"""
return (self.__chan, None)
class AgentClientProxy(object):
"""
Class proxying request as a client:
-> client ask for a request_forward_agent()
-> server creates a proxy and a fake SSH Agent
-> server ask for establishing a connection when needed,
#. client ask for a request_forward_agent()
#. server creates a proxy and a fake SSH Agent
#. server ask for establishing a connection when needed,
calling the forward_agent_handler at client side.
-> the forward_agent_handler launch a thread for connecting
#. the forward_agent_handler launch a thread for connecting
the remote fake agent and the local agent
-> Communication occurs ...
#. Communication occurs ...
"""
def __init__(self, chanRemote):
self._conn = None
@ -205,7 +202,7 @@ class AgentClientProxy(object):
def connect(self):
"""
Method automatically called by the run() method of the AgentProxyThread
Method automatically called by ``AgentProxyThread.run``.
"""
if ('SSH_AUTH_SOCK' in os.environ) and (sys.platform != 'win32'):
conn = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
@ -236,11 +233,12 @@ class AgentClientProxy(object):
if self._conn is not None:
self._conn.close()
class AgentServerProxy(AgentSSH):
"""
@param t : transport used for the Forward for SSH Agent communication
:param .Transport t: Transport used for SSH Agent communication forwarding
@raise SSHException: mostly if we lost the agent
:raises SSHException: mostly if we lost the agent
"""
def __init__(self, t):
AgentSSH.__init__(self)
@ -276,8 +274,8 @@ class AgentServerProxy(AgentSSH):
"""
Helper for the environnement under unix
@return: the SSH_AUTH_SOCK Environnement variables
@rtype: dict
:return:
a dict containing the ``SSH_AUTH_SOCK`` environnement variables
"""
env = {}
env['SSH_AUTH_SOCK'] = self._get_filename()
@ -286,6 +284,7 @@ class AgentServerProxy(AgentSSH):
def _get_filename(self):
return self._file
class AgentRequestHandler(object):
def __init__(self, chanClient):
self._conn = None
@ -303,27 +302,22 @@ class AgentRequestHandler(object):
for p in self.__clientProxys:
p.close()
class Agent(AgentSSH):
"""
Client interface for using private keys from an SSH agent running on the
local machine. If an SSH agent is running, this class can be used to
connect to it and retreive L{PKey} objects which can be used when
connect to it and retreive `.PKey` objects which can be used when
attempting to authenticate to remote SSH servers.
Because the SSH agent protocol uses environment variables and unix-domain
sockets, this probably doesn't work on Windows. It does work on most
posix platforms though (Linux and MacOS X, for example).
Upon initialization, a session with the local machine's SSH agent is
opened, if one is running. If no agent is running, initialization will
succeed, but `get_keys` will return an empty tuple.
:raises SSHException:
if an SSH agent is found, but speaks an incompatible protocol
"""
def __init__(self):
"""
Open a session with the local machine's SSH agent, if one is running.
If no agent is running, initialization will succeed, but L{get_keys}
will return an empty tuple.
@raise SSHException: if an SSH agent is found, but speaks an
incompatible protocol
"""
AgentSSH.__init__(self)
if ('SSH_AUTH_SOCK' in os.environ) and (sys.platform != 'win32'):
@ -350,13 +344,13 @@ class Agent(AgentSSH):
"""
self._close()
class AgentKey(PKey):
"""
Private key held in a local SSH agent. This type of key can be used for
authenticating to a remote server (signing). Most other key operations
work as expected.
"""
def __init__(self, agent, blob):
self.agent = agent
self.blob = blob

4
paramiko/auth_handler.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
L{AuthHandler}
`.AuthHandler`
"""
import threading
@ -167,7 +167,7 @@ class AuthHandler (object):
e = self.transport.get_exception()
if e is None:
e = AuthenticationException('Authentication failed.')
# this is horrible. python Exception isn't yet descended from
# this is horrible. Python Exception isn't yet descended from
# object, so type(e) won't work. :(
if issubclass(e.__class__, PartialAuthentication):
return e.allowed_types

56
paramiko/buffered_pipe.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
Attempt to generalize the "feeder" part of a Channel: an object which can be
Attempt to generalize the "feeder" part of a `.Channel`: an object which can be
read from and closed, but is reading from a buffer fed by another thread. The
read operations are blocking and can have a timeout set.
"""
@ -29,7 +29,7 @@ import time
class PipeTimeout (IOError):
"""
Indicates that a timeout was reached on a read from a L{BufferedPipe}.
Indicates that a timeout was reached on a read from a `.BufferedPipe`.
"""
pass
@ -38,7 +38,7 @@ class BufferedPipe (object):
"""
A buffer that obeys normal read (with timeout) & close semantics for a
file or socket, but is fed data from another thread. This is used by
L{Channel}.
`.Channel`.
"""
def __init__(self):
@ -54,8 +54,7 @@ class BufferedPipe (object):
buffer has been closed), the event will be set. When no data is
ready, the event will be cleared.
@param event: the event to set/clear
@type event: Event
:param threading.Event event: the event to set/clear
"""
self._event = event
if len(self._buffer) > 0:
@ -68,8 +67,7 @@ class BufferedPipe (object):
Feed new data into this pipe. This method is assumed to be called
from a separate thread, so synchronization is done.
@param data: the data to add
@type data: str
:param data: the data to add, as a `str`
"""
self._lock.acquire()
try:
@ -83,12 +81,12 @@ class BufferedPipe (object):
def read_ready(self):
"""
Returns true if data is buffered and ready to be read from this
feeder. A C{False} result does not mean that the feeder has closed;
feeder. A ``False`` result does not mean that the feeder has closed;
it means you may need to wait before more data arrives.
@return: C{True} if a L{read} call would immediately return at least
one byte; C{False} otherwise.
@rtype: bool
:return:
``True`` if a `read` call would immediately return at least one
byte; ``False`` otherwise.
"""
self._lock.acquire()
try:
@ -102,24 +100,22 @@ class BufferedPipe (object):
"""
Read data from the pipe. The return value is a string representing
the data received. The maximum amount of data to be received at once
is specified by C{nbytes}. If a string of length zero is returned,
is specified by ``nbytes``. If a string of length zero is returned,
the pipe has been closed.
The optional C{timeout} argument can be a nonnegative float expressing
seconds, or C{None} for no timeout. If a float is given, a
C{PipeTimeout} will be raised if the timeout period value has
elapsed before any data arrives.
The optional ``timeout`` argument can be a nonnegative float expressing
seconds, or ``None`` for no timeout. If a float is given, a
`.PipeTimeout` will be raised if the timeout period value has elapsed
before any data arrives.
@param nbytes: maximum number of bytes to read
@type nbytes: int
@param timeout: maximum seconds to wait (or C{None}, the default, to
wait forever)
@type timeout: float
@return: data
@rtype: str
:param int nbytes: maximum number of bytes to read
:param float timeout:
maximum seconds to wait (or ``None``, the default, to wait forever)
:return: the read data, as a `str`
@raise PipeTimeout: if a timeout was specified and no data was ready
before that timeout
:raises PipeTimeout:
if a timeout was specified and no data was ready before that
timeout
"""
out = ''
self._lock.acquire()
@ -158,8 +154,9 @@ class BufferedPipe (object):
"""
Clear out the buffer and return all data that was in it.
@return: any data that was in the buffer prior to clearing it out
@rtype: str
:return:
any data that was in the buffer prior to clearing it out, as a
`str`
"""
self._lock.acquire()
try:
@ -173,7 +170,7 @@ class BufferedPipe (object):
def close(self):
"""
Close this pipe object. Future calls to L{read} after the buffer
Close this pipe object. Future calls to `read` after the buffer
has been emptied will return immediately with an empty string.
"""
self._lock.acquire()
@ -189,8 +186,7 @@ class BufferedPipe (object):
"""
Return the number of bytes buffered.
@return: number of bytes bufferes
@rtype: int
:return: number (`int`) of bytes buffered
"""
self._lock.acquire()
try:

422
paramiko/channel.py
View File

@ -42,29 +42,28 @@ MIN_PACKET_SIZE = 1024
class Channel (object):
"""
A secure tunnel across an SSH L{Transport}. A Channel is meant to behave
A secure tunnel across an SSH `.Transport`. A Channel is meant to behave
like a socket, and has an API that should be indistinguishable from the
python socket API.
Python socket API.
Because SSH2 has a windowing kind of flow control, if you stop reading data
from a Channel and its buffer fills up, the server will be unable to send
you any more data until you read some of it. (This won't affect other
channels on the same transport -- all channels on a single transport are
flow-controlled independently.) Similarly, if the server isn't reading
data you send, calls to L{send} may block, unless you set a timeout. This
data you send, calls to `send` may block, unless you set a timeout. This
is exactly like a normal network socket, so it shouldn't be too surprising.
"""
def __init__(self, chanid):
"""
Create a new channel. The channel is not associated with any
particular session or L{Transport} until the Transport attaches it.
particular session or `.Transport` until the Transport attaches it.
Normally you would only call this method from the constructor of a
subclass of L{Channel}.
subclass of `.Channel`.
@param chanid: the ID of this channel, as passed by an existing
L{Transport}.
@type chanid: int
:param int chanid:
the ID of this channel, as passed by an existing `.Transport`.
"""
self.chanid = chanid
self.remote_chanid = 0
@ -104,8 +103,6 @@ class Channel (object):
def __repr__(self):
"""
Return a string representation of this object, for debugging.
@rtype: str
"""
out = '<paramiko.Channel %d' % self.chanid
if self.closed:
@ -127,23 +124,18 @@ class Channel (object):
"""
Request a pseudo-terminal from the server. This is usually used right
after creating a client channel, to ask the server to provide some
basic terminal semantics for a shell invoked with L{invoke_shell}.
basic terminal semantics for a shell invoked with `invoke_shell`.
It isn't necessary (or desirable) to call this method if you're going
to exectue a single command with L{exec_command}.
to exectue a single command with `exec_command`.
@param term: the terminal type to emulate (for example, C{'vt100'})
@type term: str
@param width: width (in characters) of the terminal screen
@type width: int
@param height: height (in characters) of the terminal screen
@type height: int
@param width_pixels: width (in pixels) of the terminal screen
@type width_pixels: int
@param height_pixels: height (in pixels) of the terminal screen
@type height_pixels: int
:param str term: the terminal type to emulate (for example, ``'vt100'``)
:param int width: width (in characters) of the terminal screen
:param int height: height (in characters) of the terminal screen
:param int width_pixels: width (in pixels) of the terminal screen
:param int height_pixels: height (in pixels) of the terminal screen
@raise SSHException: if the request was rejected or the channel was
closed
:raises SSHException:
if the request was rejected or the channel was closed
"""
if self.closed or self.eof_received or self.eof_sent or not self.active:
raise SSHException('Channel is not open')
@ -168,14 +160,14 @@ class Channel (object):
allows it, the channel will then be directly connected to the stdin,
stdout, and stderr of the shell.
Normally you would call L{get_pty} before this, in which case the
Normally you would call `get_pty` before this, in which case the
shell will operate through the pty, and the channel will be connected
to the stdin and stdout of the pty.
When the shell exits, the channel will be closed and can't be reused.
You must open a new channel if you wish to open another shell.
@raise SSHException: if the request was rejected or the channel was
:raises SSHException: if the request was rejected or the channel was
closed
"""
if self.closed or self.eof_received or self.eof_sent or not self.active:
@ -199,10 +191,9 @@ class Channel (object):
can't be reused. You must open a new channel if you wish to execute
another command.
@param command: a shell command to execute.
@type command: str
:param str command: a shell command to execute.
@raise SSHException: if the request was rejected or the channel was
:raises SSHException: if the request was rejected or the channel was
closed
"""
if self.closed or self.eof_received or self.eof_sent or not self.active:
@ -219,18 +210,17 @@ class Channel (object):
def invoke_subsystem(self, subsystem):
"""
Request a subsystem on the server (for example, C{sftp}). If the
Request a subsystem on the server (for example, ``sftp``). If the
server allows it, the channel will then be directly connected to the
requested subsystem.
When the subsystem finishes, the channel will be closed and can't be
reused.
@param subsystem: name of the subsystem being requested.
@type subsystem: str
:param str subsystem: name of the subsystem being requested.
@raise SSHException: if the request was rejected or the channel was
closed
:raises SSHException:
if the request was rejected or the channel was closed
"""
if self.closed or self.eof_received or self.eof_sent or not self.active:
raise SSHException('Channel is not open')
@ -247,19 +237,15 @@ class Channel (object):
def resize_pty(self, width=80, height=24, width_pixels=0, height_pixels=0):
"""
Resize the pseudo-terminal. This can be used to change the width and
height of the terminal emulation created in a previous L{get_pty} call.
height of the terminal emulation created in a previous `get_pty` call.
@param width: new width (in characters) of the terminal screen
@type width: int
@param height: new height (in characters) of the terminal screen
@type height: int
@param width_pixels: new width (in pixels) of the terminal screen
@type width_pixels: int
@param height_pixels: new height (in pixels) of the terminal screen
@type height_pixels: int
:param int width: new width (in characters) of the terminal screen
:param int height: new height (in characters) of the terminal screen
:param int width_pixels: new width (in pixels) of the terminal screen
:param int height_pixels: new height (in pixels) of the terminal screen
@raise SSHException: if the request was rejected or the channel was
closed
:raises SSHException:
if the request was rejected or the channel was closed
"""
if self.closed or self.eof_received or self.eof_sent or not self.active:
raise SSHException('Channel is not open')
@ -278,27 +264,27 @@ class Channel (object):
"""
Return true if the remote process has exited and returned an exit
status. You may use this to poll the process status if you don't
want to block in L{recv_exit_status}. Note that the server may not
want to block in `recv_exit_status`. Note that the server may not
return an exit status in some cases (like bad servers).
@return: True if L{recv_exit_status} will return immediately
@rtype: bool
@since: 1.7.3
:return:
``True`` if `recv_exit_status` will return immediately, else ``False``.
.. versionadded:: 1.7.3
"""
return self.closed or self.status_event.isSet()
def recv_exit_status(self):
"""
Return the exit status from the process on the server. This is
mostly useful for retrieving the reults of an L{exec_command}.
mostly useful for retrieving the reults of an `exec_command`.
If the command hasn't finished yet, this method will wait until
it does, or until the channel is closed. If no exit status is
provided by the server, -1 is returned.
@return: the exit code of the process on the server.
@rtype: int
:return: the exit code (as an `int`) of the process on the server.
@since: 1.2
.. versionadded:: 1.2
"""
self.status_event.wait()
assert self.status_event.isSet()
@ -311,10 +297,9 @@ class Channel (object):
get some sort of status code back from an executed command after
it completes.
@param status: the exit code of the process
@type status: int
:param int status: the exit code of the process
@since: 1.2
.. versionadded:: 1.2
"""
# in many cases, the channel will not still be open here.
# that's fine.
@ -347,25 +332,24 @@ class Channel (object):
If a handler is passed in, the handler is called from another thread
whenever a new x11 connection arrives. The default handler queues up
incoming x11 connections, which may be retrieved using
L{Transport.accept}. The handler's calling signature is::
`.Transport.accept`. The handler's calling signature is::
handler(channel: Channel, (address: str, port: int))
@param screen_number: the x11 screen number (0, 10, etc)
@type screen_number: int
@param auth_protocol: the name of the X11 authentication method used;
if none is given, C{"MIT-MAGIC-COOKIE-1"} is used
@type auth_protocol: str
@param auth_cookie: hexadecimal string containing the x11 auth cookie;
if none is given, a secure random 128-bit value is generated
@type auth_cookie: str
@param single_connection: if True, only a single x11 connection will be
forwarded (by default, any number of x11 connections can arrive
over this session)
@type single_connection: bool
@param handler: an optional handler to use for incoming X11 connections
@type handler: function
@return: the auth_cookie used
:param int screen_number: the x11 screen number (0, 10, etc)
:param str auth_protocol:
the name of the X11 authentication method used; if none is given,
``"MIT-MAGIC-COOKIE-1"`` is used
:param str auth_cookie:
hexadecimal string containing the x11 auth cookie; if none is
given, a secure random 128-bit value is generated
:param bool single_connection:
if True, only a single x11 connection will be forwarded (by
default, any number of x11 connections can arrive over this
session)
:param function handler:
an optional handler to use for incoming X11 connections
:return: the auth_cookie used
"""
if self.closed or self.eof_received or self.eof_sent or not self.active:
raise SSHException('Channel is not open')
@ -392,15 +376,14 @@ class Channel (object):
def request_forward_agent(self, handler):
"""
Request for a forward SSH Agent on this channel.
This is only valid for an ssh-agent from openssh !!!
This is only valid for an ssh-agent from OpenSSH !!!
@param handler: a required handler to use for incoming SSH Agent connections
@type handler: function
:param function handler:
a required handler to use for incoming SSH Agent connections
@return: if we are ok or not (at that time we always return ok)
@rtype: boolean
:return: True if we are ok, else False (at that time we always return ok)
@raise: SSHException in case of channel problem.
:raises: SSHException in case of channel problem.
"""
if self.closed or self.eof_received or self.eof_sent or not self.active:
raise SSHException('Channel is not open')
@ -416,10 +399,7 @@ class Channel (object):
def get_transport(self):
"""
Return the L{Transport} associated with this channel.
@return: the L{Transport} that was used to create this channel.
@rtype: L{Transport}
Return the `.Transport` associated with this channel.
"""
return self.transport
@ -427,55 +407,49 @@ class Channel (object):
"""
Set a name for this channel. Currently it's only used to set the name
of the channel in logfile entries. The name can be fetched with the
L{get_name} method.
`get_name` method.
@param name: new channel name
@type name: str
:param str name: new channel name
"""
self._name = name
def get_name(self):
"""
Get the name of this channel that was previously set by L{set_name}.
@return: the name of this channel.
@rtype: str
Get the name of this channel that was previously set by `set_name`.
"""
return self._name
def get_id(self):
"""
Return the ID # for this channel. The channel ID is unique across
a L{Transport} and usually a small number. It's also the number
passed to L{ServerInterface.check_channel_request} when determining
whether to accept a channel request in server mode.
@return: the ID of this channel.
@rtype: int
Return the `int` ID # for this channel.
The channel ID is unique across a `.Transport` and usually a small
number. It's also the number passed to
`.ServerInterface.check_channel_request` when determining whether to
accept a channel request in server mode.
"""
return self.chanid
def set_combine_stderr(self, combine):
"""
Set whether stderr should be combined into stdout on this channel.
The default is C{False}, but in some cases it may be convenient to
The default is ``False``, but in some cases it may be convenient to
have both streams combined.
If this is C{False}, and L{exec_command} is called (or C{invoke_shell}
with no pty), output to stderr will not show up through the L{recv}
and L{recv_ready} calls. You will have to use L{recv_stderr} and
L{recv_stderr_ready} to get stderr output.
If this is ``False``, and `exec_command` is called (or ``invoke_shell``
with no pty), output to stderr will not show up through the `recv`
and `recv_ready` calls. You will have to use `recv_stderr` and
`recv_stderr_ready` to get stderr output.
If this is C{True}, data will never show up via L{recv_stderr} or
L{recv_stderr_ready}.
If this is ``True``, data will never show up via `recv_stderr` or
`recv_stderr_ready`.
@param combine: C{True} if stderr output should be combined into
stdout on this channel.
@type combine: bool
@return: previous setting.
@rtype: bool
:param bool combine:
``True`` if stderr output should be combined into stdout on this
channel.
:return: the previous setting (a `bool`).
@since: 1.1
.. versionadded:: 1.1
"""
data = ''
self.lock.acquire()
@ -497,51 +471,47 @@ class Channel (object):
def settimeout(self, timeout):
"""
Set a timeout on blocking read/write operations. The C{timeout}
argument can be a nonnegative float expressing seconds, or C{None}. If
Set a timeout on blocking read/write operations. The ``timeout``
argument can be a nonnegative float expressing seconds, or ``None``. If
a float is given, subsequent channel read/write operations will raise
a timeout exception if the timeout period value has elapsed before the
operation has completed. Setting a timeout of C{None} disables
operation has completed. Setting a timeout of ``None`` disables
timeouts on socket operations.
C{chan.settimeout(0.0)} is equivalent to C{chan.setblocking(0)};
C{chan.settimeout(None)} is equivalent to C{chan.setblocking(1)}.
``chan.settimeout(0.0)`` is equivalent to ``chan.setblocking(0)``;
``chan.settimeout(None)`` is equivalent to ``chan.setblocking(1)``.
@param timeout: seconds to wait for a pending read/write operation
before raising C{socket.timeout}, or C{None} for no timeout.
@type timeout: float
:param float timeout:
seconds to wait for a pending read/write operation before raising
``socket.timeout``, or ``None`` for no timeout.
"""
self.timeout = timeout
def gettimeout(self):
"""
Returns the timeout in seconds (as a float) associated with socket
operations, or C{None} if no timeout is set. This reflects the last
call to L{setblocking} or L{settimeout}.
@return: timeout in seconds, or C{None}.
@rtype: float
operations, or ``None`` if no timeout is set. This reflects the last
call to `setblocking` or `settimeout`.
"""
return self.timeout
def setblocking(self, blocking):
"""
Set blocking or non-blocking mode of the channel: if C{blocking} is 0,
Set blocking or non-blocking mode of the channel: if ``blocking`` is 0,
the channel is set to non-blocking mode; otherwise it's set to blocking
mode. Initially all channels are in blocking mode.
In non-blocking mode, if a L{recv} call doesn't find any data, or if a
L{send} call can't immediately dispose of the data, an error exception
In non-blocking mode, if a `recv` call doesn't find any data, or if a
`send` call can't immediately dispose of the data, an error exception
is raised. In blocking mode, the calls block until they can proceed. An
EOF condition is considered "immediate data" for L{recv}, so if the
EOF condition is considered "immediate data" for `recv`, so if the
channel is closed in the read direction, it will never block.
C{chan.setblocking(0)} is equivalent to C{chan.settimeout(0)};
C{chan.setblocking(1)} is equivalent to C{chan.settimeout(None)}.
``chan.setblocking(0)`` is equivalent to ``chan.settimeout(0)``;
``chan.setblocking(1)`` is equivalent to ``chan.settimeout(None)``.
@param blocking: 0 to set non-blocking mode; non-0 to set blocking
mode.
@type blocking: int
:param int blocking:
0 to set non-blocking mode; non-0 to set blocking mode.
"""
if blocking:
self.settimeout(None)
@ -551,12 +521,10 @@ class Channel (object):
def getpeername(self):
"""
Return the address of the remote side of this Channel, if possible.
This is just a wrapper around C{'getpeername'} on the Transport, used
to provide enough of a socket-like interface to allow asyncore to work.
(asyncore likes to call C{'getpeername'}.)
@return: the address if the remote host, if known
@rtype: tuple(str, int)
This simply wraps `.Transport.getpeername`, used to provide enough of a
socket-like interface to allow asyncore to work. (asyncore likes to
call ``'getpeername'``.)
"""
return self.transport.getpeername()
@ -564,7 +532,7 @@ class Channel (object):
"""
Close the channel. All future read/write operations on the channel
will fail. The remote end will receive no more data (after queued data
is flushed). Channels are automatically closed when their L{Transport}
is flushed). Channels are automatically closed when their `.Transport`
is closed or when they are garbage collected.
"""
self.lock.acquire()
@ -589,12 +557,12 @@ class Channel (object):
def recv_ready(self):
"""
Returns true if data is buffered and ready to be read from this
channel. A C{False} result does not mean that the channel has closed;
channel. A ``False`` result does not mean that the channel has closed;
it means you may need to wait before more data arrives.
@return: C{True} if a L{recv} call on this channel would immediately
return at least one byte; C{False} otherwise.
@rtype: boolean
:return:
``True`` if a `recv` call on this channel would immediately return
at least one byte; ``False`` otherwise.
"""
return self.in_buffer.read_ready()
@ -602,16 +570,14 @@ class Channel (object):
"""
Receive data from the channel. The return value is a string
representing the data received. The maximum amount of data to be
received at once is specified by C{nbytes}. If a string of length zero
received at once is specified by ``nbytes``. If a string of length zero
is returned, the channel stream has closed.
@param nbytes: maximum number of bytes to read.
@type nbytes: int
@return: data.
@rtype: str
:param int nbytes: maximum number of bytes to read.
:return: received data, as a `str`
@raise socket.timeout: if no data is ready before the timeout set by
L{settimeout}.
:raises socket.timeout:
if no data is ready before the timeout set by `settimeout`.
"""
try:
out = self.in_buffer.read(nbytes, self.timeout)
@ -632,36 +598,34 @@ class Channel (object):
def recv_stderr_ready(self):
"""
Returns true if data is buffered and ready to be read from this
channel's stderr stream. Only channels using L{exec_command} or
L{invoke_shell} without a pty will ever have data on the stderr
channel's stderr stream. Only channels using `exec_command` or
`invoke_shell` without a pty will ever have data on the stderr
stream.
@return: C{True} if a L{recv_stderr} call on this channel would
immediately return at least one byte; C{False} otherwise.
@rtype: boolean
:return:
``True`` if a `recv_stderr` call on this channel would immediately
return at least one byte; ``False`` otherwise.
@since: 1.1
.. versionadded:: 1.1
"""
return self.in_stderr_buffer.read_ready()
def recv_stderr(self, nbytes):
"""
Receive data from the channel's stderr stream. Only channels using
L{exec_command} or L{invoke_shell} without a pty will ever have data
`exec_command` or `invoke_shell` without a pty will ever have data
on the stderr stream. The return value is a string representing the
data received. The maximum amount of data to be received at once is
specified by C{nbytes}. If a string of length zero is returned, the
specified by ``nbytes``. If a string of length zero is returned, the
channel stream has closed.
@param nbytes: maximum number of bytes to read.
@type nbytes: int
@return: data.
@rtype: str
:param int nbytes: maximum number of bytes to read.
:return: received data as a `str`
@raise socket.timeout: if no data is ready before the timeout set by
L{settimeout}.
:raises socket.timeout: if no data is ready before the timeout set by
`settimeout`.
@since: 1.1
.. versionadded:: 1.1
"""
try:
out = self.in_stderr_buffer.read(nbytes, self.timeout)
@ -685,12 +649,12 @@ class Channel (object):
This means the channel is either closed (so any write attempt would
return immediately) or there is at least one byte of space in the
outbound buffer. If there is at least one byte of space in the
outbound buffer, a L{send} call will succeed immediately and return
outbound buffer, a `send` call will succeed immediately and return
the number of bytes actually written.
@return: C{True} if a L{send} call on this channel would immediately
succeed or fail
@rtype: boolean
:return:
``True`` if a `send` call on this channel would immediately succeed
or fail
"""
self.lock.acquire()
try:
@ -708,13 +672,11 @@ class Channel (object):
transmitted, the application needs to attempt delivery of the remaining
data.
@param s: data to send
@type s: str
@return: number of bytes actually sent
@rtype: int
:param str s: data to send
:return: number of bytes actually sent, as an `int`
@raise socket.timeout: if no data could be sent before the timeout set
by L{settimeout}.
:raises socket.timeout: if no data could be sent before the timeout set
by `settimeout`.
"""
size = len(s)
self.lock.acquire()
@ -743,15 +705,13 @@ class Channel (object):
data has been sent: if only some of the data was transmitted, the
application needs to attempt delivery of the remaining data.
@param s: data to send.
@type s: str
@return: number of bytes actually sent.
@rtype: int
:param str s: data to send.
:return: number of bytes actually sent, as an `int`.
@raise socket.timeout: if no data could be sent before the timeout set
by L{settimeout}.
:raises socket.timeout:
if no data could be sent before the timeout set by `settimeout`.
@since: 1.1
.. versionadded:: 1.1
"""
size = len(s)
self.lock.acquire()
@ -775,20 +735,20 @@ class Channel (object):
def sendall(self, s):
"""
Send data to the channel, without allowing partial results. Unlike
L{send}, this method continues to send data from the given string until
`send`, this method continues to send data from the given string until
either all data has been sent or an error occurs. Nothing is returned.
@param s: data to send.
@type s: str
:param str s: data to send.
@raise socket.timeout: if sending stalled for longer than the timeout
set by L{settimeout}.
@raise socket.error: if an error occured before the entire string was
sent.
:raises socket.timeout:
if sending stalled for longer than the timeout set by `settimeout`.
:raises socket.error:
if an error occured before the entire string was sent.
@note: If the channel is closed while only part of the data hase been
.. note::
If the channel is closed while only part of the data hase been
sent, there is no way to determine how much data (if any) was sent.
This is irritating, but identically follows python's API.
This is irritating, but identically follows Python's API.
"""
while s:
if self.closed:
@ -801,19 +761,18 @@ class Channel (object):
def sendall_stderr(self, s):
"""
Send data to the channel's "stderr" stream, without allowing partial
results. Unlike L{send_stderr}, this method continues to send data
results. Unlike `send_stderr`, this method continues to send data
from the given string until all data has been sent or an error occurs.
Nothing is returned.
@param s: data to send to the client as "stderr" output.
@type s: str
:param str s: data to send to the client as "stderr" output.
@raise socket.timeout: if sending stalled for longer than the timeout
set by L{settimeout}.
@raise socket.error: if an error occured before the entire string was
sent.
:raises socket.timeout:
if sending stalled for longer than the timeout set by `settimeout`.
:raises socket.error:
if an error occured before the entire string was sent.
@since: 1.1
.. versionadded:: 1.1
"""
while s:
if self.closed:
@ -825,49 +784,46 @@ class Channel (object):
def makefile(self, *params):
"""
Return a file-like object associated with this channel. The optional
C{mode} and C{bufsize} arguments are interpreted the same way as by
the built-in C{file()} function in python.
``mode`` and ``bufsize`` arguments are interpreted the same way as by
the built-in ``file()`` function in Python.
@return: object which can be used for python file I/O.
@rtype: L{ChannelFile}
:return: `.ChannelFile` object which can be used for Python file I/O.
"""
return ChannelFile(*([self] + list(params)))
def makefile_stderr(self, *params):
"""
Return a file-like object associated with this channel's stderr
stream. Only channels using L{exec_command} or L{invoke_shell}
stream. Only channels using `exec_command` or `invoke_shell`
without a pty will ever have data on the stderr stream.
The optional C{mode} and C{bufsize} arguments are interpreted the
same way as by the built-in C{file()} function in python. For a
The optional ``mode`` and ``bufsize`` arguments are interpreted the
same way as by the built-in ``file()`` function in Python. For a
client, it only makes sense to open this file for reading. For a
server, it only makes sense to open this file for writing.
@return: object which can be used for python file I/O.
@rtype: L{ChannelFile}
:return: `.ChannelFile` object which can be used for Python file I/O.
@since: 1.1
.. versionadded:: 1.1
"""
return ChannelStderrFile(*([self] + list(params)))
def fileno(self):
"""
Returns an OS-level file descriptor which can be used for polling, but
but I{not} for reading or writing. This is primaily to allow python's
C{select} module to work.
but not for reading or writing. This is primaily to allow Python's
``select`` module to work.
The first time C{fileno} is called on a channel, a pipe is created to
The first time ``fileno`` is called on a channel, a pipe is created to
simulate real OS-level file descriptor (FD) behavior. Because of this,
two OS-level FDs are created, which will use up FDs faster than normal.
(You won't notice this effect unless you have hundreds of channels
open at the same time.)
@return: an OS-level file descriptor
@rtype: int
:return: an OS-level file descriptor (`int`)
@warning: This method causes channel reads to be slightly less
efficient.
.. warning::
This method causes channel reads to be slightly less efficient.
"""
self.lock.acquire()
try:
@ -884,14 +840,14 @@ class Channel (object):
def shutdown(self, how):
"""
Shut down one or both halves of the connection. If C{how} is 0,
further receives are disallowed. If C{how} is 1, further sends
are disallowed. If C{how} is 2, further sends and receives are
Shut down one or both halves of the connection. If ``how`` is 0,
further receives are disallowed. If ``how`` is 1, further sends
are disallowed. If ``how`` is 2, further sends and receives are
disallowed. This closes the stream in one or both directions.
@param how: 0 (stop receiving), 1 (stop sending), or 2 (stop
receiving and sending).
@type how: int
:param int how:
0 (stop receiving), 1 (stop sending), or 2 (stop receiving and
sending).
"""
if (how == 0) or (how == 2):
# feign "read" shutdown
@ -910,10 +866,10 @@ class Channel (object):
Shutdown the receiving side of this socket, closing the stream in
the incoming direction. After this call, future reads on this
channel will fail instantly. This is a convenience method, equivalent
to C{shutdown(0)}, for people who don't make it a habit to
to ``shutdown(0)``, for people who don't make it a habit to
memorize unix constants from the 1970s.
@since: 1.2
.. versionadded:: 1.2
"""
self.shutdown(0)
@ -922,10 +878,10 @@ class Channel (object):
Shutdown the sending side of this socket, closing the stream in
the outgoing direction. After this call, future writes on this
channel will fail instantly. This is a convenience method, equivalent
to C{shutdown(1)}, for people who don't make it a habit to
to ``shutdown(1)``, for people who don't make it a habit to
memorize unix constants from the 1970s.
@since: 1.2
.. versionadded:: 1.2
"""
self.shutdown(1)
@ -1196,7 +1152,7 @@ class Channel (object):
def _wait_for_send_window(self, size):
"""
(You are already holding the lock.)
Wait for the send window to open up, and allocate up to C{size} bytes
Wait for the send window to open up, and allocate up to ``size`` bytes
for transmission. If no space opens up before the timeout, a timeout
exception is raised. Returns the number of bytes available to send
(may be less than requested).
@ -1234,13 +1190,15 @@ class Channel (object):
class ChannelFile (BufferedFile):
"""
A file-like wrapper around L{Channel}. A ChannelFile is created by calling
L{Channel.makefile}.
A file-like wrapper around `.Channel`. A ChannelFile is created by calling
`Channel.makefile`.
@bug: To correctly emulate the file object created from a socket's
C{makefile} method, a L{Channel} and its C{ChannelFile} should be able
to be closed or garbage-collected independently. Currently, closing
the C{ChannelFile} does nothing but flush the buffer.
.. warning::
To correctly emulate the file object created from a socket's `makefile
<python:socket.socket.makefile>` method, a `.Channel` and its
`.ChannelFile` should be able to be closed or garbage-collected
independently. Currently, closing the `ChannelFile` does nothing but
flush the buffer.
"""
def __init__(self, channel, mode = 'r', bufsize = -1):
@ -1251,8 +1209,6 @@ class ChannelFile (BufferedFile):
def __repr__(self):
"""
Returns a string representation of this object, for debugging.
@rtype: str
"""
return '<paramiko.ChannelFile from ' + repr(self.channel) + '>'

293
paramiko/client.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
L{SSHClient}.
SSH client & key policies
"""
from binascii import hexlify
@ -38,67 +38,10 @@ from paramiko.transport import Transport
from paramiko.util import retry_on_signal
class MissingHostKeyPolicy (object):
"""
Interface for defining the policy that L{SSHClient} should use when the
SSH server's hostname is not in either the system host keys or the
application's keys. Pre-made classes implement policies for automatically
adding the key to the application's L{HostKeys} object (L{AutoAddPolicy}),
and for automatically rejecting the key (L{RejectPolicy}).
This function may be used to ask the user to verify the key, for example.
"""
def missing_host_key(self, client, hostname, key):
"""
Called when an L{SSHClient} receives a server key for a server that
isn't in either the system or local L{HostKeys} object. To accept
the key, simply return. To reject, raised an exception (which will
be passed to the calling application).
"""
pass
class AutoAddPolicy (MissingHostKeyPolicy):
"""
Policy for automatically adding the hostname and new host key to the
local L{HostKeys} object, and saving it. This is used by L{SSHClient}.
"""
def missing_host_key(self, client, hostname, key):
client._host_keys.add(hostname, key.get_name(), key)
if client._host_keys_filename is not None:
client.save_host_keys(client._host_keys_filename)
client._log(DEBUG, 'Adding %s host key for %s: %s' %
(key.get_name(), hostname, hexlify(key.get_fingerprint())))
class RejectPolicy (MissingHostKeyPolicy):
"""
Policy for automatically rejecting the unknown hostname & key. This is
used by L{SSHClient}.
"""
def missing_host_key(self, client, hostname, key):
client._log(DEBUG, 'Rejecting %s host key for %s: %s' %
(key.get_name(), hostname, hexlify(key.get_fingerprint())))
raise SSHException('Server %r not found in known_hosts' % hostname)
class WarningPolicy (MissingHostKeyPolicy):
"""
Policy for logging a python-style warning for an unknown host key, but
accepting it. This is used by L{SSHClient}.
"""
def missing_host_key(self, client, hostname, key):
warnings.warn('Unknown %s host key for %s: %s' %
(key.get_name(), hostname, hexlify(key.get_fingerprint())))
class SSHClient (object):
"""
A high-level representation of a session with an SSH server. This class
wraps L{Transport}, L{Channel}, and L{SFTPClient} to take care of most
wraps `.Transport`, `.Channel`, and `.SFTPClient` to take care of most
aspects of authenticating and opening channels. A typical use case is::
client = SSHClient()
@ -110,7 +53,7 @@ class SSHClient (object):
checking. The default mechanism is to try to use local key files or an
SSH agent (if one is running).
@since: 1.6
.. versionadded:: 1.6
"""
def __init__(self):
@ -128,22 +71,21 @@ class SSHClient (object):
def load_system_host_keys(self, filename=None):
"""
Load host keys from a system (read-only) file. Host keys read with
this method will not be saved back by L{save_host_keys}.
this method will not be saved back by `save_host_keys`.
This method can be called multiple times. Each new set of host keys
will be merged with the existing set (new replacing old if there are
conflicts).
If C{filename} is left as C{None}, an attempt will be made to read
If ``filename`` is left as ``None``, an attempt will be made to read
keys from the user's local "known hosts" file, as used by OpenSSH,
and no exception will be raised if the file can't be read. This is
probably only useful on posix.
@param filename: the filename to read, or C{None}
@type filename: str
:param str filename: the filename to read, or ``None``
@raise IOError: if a filename was provided and the file could not be
read
:raises IOError:
if a filename was provided and the file could not be read
"""
if filename is None:
# try the user's .ssh key file, and mask exceptions
@ -158,19 +100,18 @@ class SSHClient (object):
def load_host_keys(self, filename):
"""
Load host keys from a local host-key file. Host keys read with this
method will be checked I{after} keys loaded via L{load_system_host_keys},
but will be saved back by L{save_host_keys} (so they can be modified).
The missing host key policy L{AutoAddPolicy} adds keys to this set and
method will be checked after keys loaded via `load_system_host_keys`,
but will be saved back by `save_host_keys` (so they can be modified).
The missing host key policy `.AutoAddPolicy` adds keys to this set and
saves them, when connecting to a previously-unknown server.
This method can be called multiple times. Each new set of host keys
will be merged with the existing set (new replacing old if there are
conflicts). When automatically saving, the last hostname is used.
@param filename: the filename to read
@type filename: str
:param str filename: the filename to read
@raise IOError: if the filename could not be read
:raises IOError: if the filename could not be read
"""
self._host_keys_filename = filename
self._host_keys.load(filename)
@ -178,13 +119,12 @@ class SSHClient (object):
def save_host_keys(self, filename):
"""
Save the host keys back to a file. Only the host keys loaded with
L{load_host_keys} (plus any added directly) will be saved -- not any
host keys loaded with L{load_system_host_keys}.
`load_host_keys` (plus any added directly) will be saved -- not any
host keys loaded with `load_system_host_keys`.
@param filename: the filename to save to
@type filename: str
:param str filename: the filename to save to
@raise IOError: if the file could not be written
:raises IOError: if the file could not be written
"""
# update local host keys from file (in case other SSH clients
@ -200,34 +140,32 @@ class SSHClient (object):
def get_host_keys(self):
"""
Get the local L{HostKeys} object. This can be used to examine the
Get the local `.HostKeys` object. This can be used to examine the
local host keys or change them.
@return: the local host keys
@rtype: L{HostKeys}
:return: the local host keys as a `.HostKeys` object.
"""
return self._host_keys
def set_log_channel(self, name):
"""
Set the channel for logging. The default is C{"paramiko.transport"}
Set the channel for logging. The default is ``"paramiko.transport"``
but it can be set to anything you want.
@param name: new channel name for logging
@type name: str
:param str name: new channel name for logging
"""
self._log_channel = name
def set_missing_host_key_policy(self, policy):
"""
Set the policy to use when connecting to a server that doesn't have a
host key in either the system or local L{HostKeys} objects. The
default policy is to reject all unknown servers (using L{RejectPolicy}).
You may substitute L{AutoAddPolicy} or write your own policy class.
host key in either the system or local `.HostKeys` objects. The
default policy is to reject all unknown servers (using `.RejectPolicy`).
You may substitute `.AutoAddPolicy` or write your own policy class.
@param policy: the policy to use when receiving a host key from a
:param .MissingHostKeyPolicy policy:
the policy to use when receiving a host key from a
previously-unknown server
@type policy: L{MissingHostKeyPolicy}
"""
self._policy = policy
@ -236,56 +174,49 @@ class SSHClient (object):
compress=False, sock=None):
"""
Connect to an SSH server and authenticate to it. The server's host key
is checked against the system host keys (see L{load_system_host_keys})
and any local host keys (L{load_host_keys}). If the server's hostname
is checked against the system host keys (see `load_system_host_keys`)
and any local host keys (`load_host_keys`). If the server's hostname
is not found in either set of host keys, the missing host key policy
is used (see L{set_missing_host_key_policy}). The default policy is
to reject the key and raise an L{SSHException}.
is used (see `set_missing_host_key_policy`). The default policy is
to reject the key and raise an `.SSHException`.
Authentication is attempted in the following order of priority:
- The C{pkey} or C{key_filename} passed in (if any)
- The ``pkey`` or ``key_filename`` passed in (if any)
- Any key we can find through an SSH agent
- Any "id_rsa" or "id_dsa" key discoverable in C{~/.ssh/}
- Any "id_rsa" or "id_dsa" key discoverable in ``~/.ssh/``
- Plain username/password auth, if a password was given
If a private key requires a password to unlock it, and a password is
passed in, that password will be used to attempt to unlock the key.
@param hostname: the server to connect to
@type hostname: str
@param port: the server port to connect to
@type port: int
@param username: the username to authenticate as (defaults to the
current local username)
@type username: str
@param password: a password to use for authentication or for unlocking
a private key
@type password: str
@param pkey: an optional private key to use for authentication
@type pkey: L{PKey}
@param key_filename: the filename, or list of filenames, of optional
private key(s) to try for authentication
@type key_filename: str or list(str)
@param timeout: an optional timeout (in seconds) for the TCP connect
@type timeout: float
@param allow_agent: set to False to disable connecting to the SSH agent
@type allow_agent: bool
@param look_for_keys: set to False to disable searching for discoverable
private key files in C{~/.ssh/}
@type look_for_keys: bool
@param compress: set to True to turn on compression
@type compress: bool
@param sock: an open socket or socket-like object (such as a
L{Channel}) to use for communication to the target host
@type sock: socket
:param str hostname: the server to connect to
:param int port: the server port to connect to
:param str username:
the username to authenticate as (defaults to the current local
username)
:param str password:
a password to use for authentication or for unlocking a private key
:param .PKey pkey: an optional private key to use for authentication
:param str key_filename:
the filename, or list of filenames, of optional private key(s) to
try for authentication
:param float timeout: an optional timeout (in seconds) for the TCP connect
:param bool allow_agent: set to False to disable connecting to the SSH agent
:param bool look_for_keys:
set to False to disable searching for discoverable private key
files in ``~/.ssh/``
:param bool compress: set to True to turn on compression
:param socket sock:
an open socket or socket-like object (such as a `.Channel`) to use
for communication to the target host
@raise BadHostKeyException: if the server's host key could not be
:raises BadHostKeyException: if the server's host key could not be
verified
@raise AuthenticationException: if authentication failed
@raise SSHException: if there was any other error connecting or
:raises AuthenticationException: if authentication failed
:raises SSHException: if there was any other error connecting or
establishing an SSH session
@raise socket.error: if a socket error occurred while connecting
:raises socket.error: if a socket error occurred while connecting
"""
if not sock:
for (family, socktype, proto, canonname, sockaddr) in socket.getaddrinfo(hostname, port, socket.AF_UNSPEC, socket.SOCK_STREAM):
@ -343,7 +274,7 @@ class SSHClient (object):
def close(self):
"""
Close this SSHClient and its underlying L{Transport}.
Close this SSHClient and its underlying `.Transport`.
"""
if self._transport is None:
return
@ -356,21 +287,22 @@ class SSHClient (object):
def exec_command(self, command, bufsize=-1, timeout=None, get_pty=False):
"""
Execute a command on the SSH server. A new L{Channel} is opened and
Execute a command on the SSH server. A new `.Channel` is opened and
the requested command is executed. The command's input and output
streams are returned as python C{file}-like objects representing
streams are returned as Python ``file``-like objects representing
stdin, stdout, and stderr.
@param command: the command to execute
@type command: str
@param bufsize: interpreted the same way as by the built-in C{file()} function in python
@type bufsize: int
@param timeout: set command's channel timeout. See L{Channel.settimeout}.settimeout
@type timeout: int
@return: the stdin, stdout, and stderr of the executing command
@rtype: tuple(L{ChannelFile}, L{ChannelFile}, L{ChannelFile})
:param str command: the command to execute
:param int bufsize:
interpreted the same way as by the built-in ``file()`` function in
Python
:param int timeout:
set command's channel timeout. See `Channel.settimeout`.settimeout
:return:
the stdin, stdout, and stderr of the executing command, as a
3-tuple
@raise SSHException: if the server fails to execute the command
:raises SSHException: if the server fails to execute the command
"""
chan = self._transport.open_session()
if(get_pty):
@ -385,24 +317,19 @@ class SSHClient (object):
def invoke_shell(self, term='vt100', width=80, height=24, width_pixels=0,
height_pixels=0):
"""
Start an interactive shell session on the SSH server. A new L{Channel}
Start an interactive shell session on the SSH server. A new `.Channel`
is opened and connected to a pseudo-terminal using the requested
terminal type and size.
@param term: the terminal type to emulate (for example, C{"vt100"})
@type term: str
@param width: the width (in characters) of the terminal window
@type width: int
@param height: the height (in characters) of the terminal window
@type height: int
@param width_pixels: the width (in pixels) of the terminal window
@type width_pixels: int
@param height_pixels: the height (in pixels) of the terminal window
@type height_pixels: int
@return: a new channel connected to the remote shell
@rtype: L{Channel}
:param str term:
the terminal type to emulate (for example, ``"vt100"``)
:param int width: the width (in characters) of the terminal window
:param int height: the height (in characters) of the terminal window
:param int width_pixels: the width (in pixels) of the terminal window
:param int height_pixels: the height (in pixels) of the terminal window
:return: a new `.Channel` connected to the remote shell
@raise SSHException: if the server fails to invoke a shell
:raises SSHException: if the server fails to invoke a shell
"""
chan = self._transport.open_session()
chan.get_pty(term, width, height, width_pixels, height_pixels)
@ -413,19 +340,17 @@ class SSHClient (object):
"""
Open an SFTP session on the SSH server.
@return: a new SFTP session object
@rtype: L{SFTPClient}
:return: a new `.SFTPClient` session object
"""
return self._transport.open_sftp_client()
def get_transport(self):
"""
Return the underlying L{Transport} object for this SSH connection.
Return the underlying `.Transport` object for this SSH connection.
This can be used to perform lower-level tasks, like opening specific
kinds of channels.
@return: the Transport for this connection
@rtype: L{Transport}
:return: the `.Transport` for this connection
"""
return self._transport
@ -536,3 +461,59 @@ class SSHClient (object):
def _log(self, level, msg):
self._transport._log(level, msg)
class MissingHostKeyPolicy (object):
"""
Interface for defining the policy that `.SSHClient` should use when the
SSH server's hostname is not in either the system host keys or the
application's keys. Pre-made classes implement policies for automatically
adding the key to the application's `.HostKeys` object (`.AutoAddPolicy`),
and for automatically rejecting the key (`.RejectPolicy`).
This function may be used to ask the user to verify the key, for example.
"""
def missing_host_key(self, client, hostname, key):
"""
Called when an `.SSHClient` receives a server key for a server that
isn't in either the system or local `.HostKeys` object. To accept
the key, simply return. To reject, raised an exception (which will
be passed to the calling application).
"""
pass
class AutoAddPolicy (MissingHostKeyPolicy):
"""
Policy for automatically adding the hostname and new host key to the
local `.HostKeys` object, and saving it. This is used by `.SSHClient`.
"""
def missing_host_key(self, client, hostname, key):
client._host_keys.add(hostname, key.get_name(), key)
if client._host_keys_filename is not None:
client.save_host_keys(client._host_keys_filename)
client._log(DEBUG, 'Adding %s host key for %s: %s' %
(key.get_name(), hostname, hexlify(key.get_fingerprint())))
class RejectPolicy (MissingHostKeyPolicy):
"""
Policy for automatically rejecting the unknown hostname & key. This is
used by `.SSHClient`.
"""
def missing_host_key(self, client, hostname, key):
client._log(DEBUG, 'Rejecting %s host key for %s: %s' %
(key.get_name(), hostname, hexlify(key.get_fingerprint())))
raise SSHException('Server %r not found in known_hosts' % hostname)
class WarningPolicy (MissingHostKeyPolicy):
"""
Policy for logging a Python-style warning for an unknown host key, but
accepting it. This is used by `.SSHClient`.
"""
def missing_host_key(self, client, hostname, key):
warnings.warn('Unknown %s host key for %s: %s' %
(key.get_name(), hostname, hexlify(key.get_fingerprint())))

143
paramiko/config.py
View File

@ -18,7 +18,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
L{SSHConfig}.
Configuration file (aka ``ssh_config``) support.
"""
import fnmatch
@ -30,69 +30,15 @@ SSH_PORT = 22
proxy_re = re.compile(r"^(proxycommand)\s*=*\s*(.*)", re.I)
class LazyFqdn(object):
"""
Returns the host's fqdn on request as string.
"""
def __init__(self, config, host=None):
self.fqdn = None
self.config = config
self.host = host
def __str__(self):
if self.fqdn is None:
#
# If the SSH config contains AddressFamily, use that when
# determining the local host's FQDN. Using socket.getfqdn() from
# the standard library is the most general solution, but can
# result in noticeable delays on some platforms when IPv6 is
# misconfigured or not available, as it calls getaddrinfo with no
# address family specified, so both IPv4 and IPv6 are checked.
#
# Handle specific option
fqdn = None
address_family = self.config.get('addressfamily', 'any').lower()
if address_family != 'any':
try:
family = socket.AF_INET if address_family == 'inet' \
else socket.AF_INET6
results = socket.getaddrinfo(
self.host,
None,
family,
socket.SOCK_DGRAM,
socket.IPPROTO_IP,
socket.AI_CANONNAME
)
for res in results:
af, socktype, proto, canonname, sa = res
if canonname and '.' in canonname:
fqdn = canonname
break
# giaerror -> socket.getaddrinfo() can't resolve self.host
# (which is from socket.gethostname()). Fall back to the
# getfqdn() call below.
except socket.gaierror:
pass
# Handle 'any' / unspecified
if fqdn is None:
fqdn = socket.getfqdn()
# Cache
self.fqdn = fqdn
return self.fqdn
class SSHConfig (object):
"""
Representation of config information as stored in the format used by
OpenSSH. Queries can be made via L{lookup}. The format is described in
OpenSSH's C{ssh_config} man page. This class is provided primarily as a
OpenSSH. Queries can be made via `lookup`. The format is described in
OpenSSH's ``ssh_config`` man page. This class is provided primarily as a
convenience to posix users (since the OpenSSH format is a de-facto
standard on posix) but should work fine on Windows too.
@since: 1.6
.. versionadded:: 1.6
"""
def __init__(self):
@ -105,8 +51,7 @@ class SSHConfig (object):
"""
Read an OpenSSH config from the given file object.
@param file_obj: a file-like object to read the config file from
@type file_obj: file
:param file file_obj: a file-like object to read the config file from
"""
host = {"host": ['*'], "config": {}}
for line in file_obj:
@ -152,22 +97,20 @@ class SSHConfig (object):
"""
Return a dict of config options for a given hostname.
The host-matching rules of OpenSSH's C{ssh_config} man page are used,
The host-matching rules of OpenSSH's ``ssh_config`` man page are used,
which means that all configuration options from matching host
specifications are merged, with more specific hostmasks taking
precedence. In other words, if C{"Port"} is set under C{"Host *"}
and also C{"Host *.example.com"}, and the lookup is for
C{"ssh.example.com"}, then the port entry for C{"Host *.example.com"}
precedence. In other words, if ``"Port"`` is set under ``"Host *"``
and also ``"Host *.example.com"``, and the lookup is for
``"ssh.example.com"``, then the port entry for ``"Host *.example.com"``
will win out.
The keys in the returned dict are all normalized to lowercase (look for
C{"port"}, not C{"Port"}. The values are processed according to the
rules for substitution variable expansion in C{ssh_config}.
``"port"``, not ``"Port"``. The values are processed according to the
rules for substitution variable expansion in ``ssh_config``.
@param hostname: the hostname to lookup
@type hostname: str
:param str hostname: the hostname to lookup
"""
matches = [config for config in self._config if
self._allowed(hostname, config['host'])]
@ -199,13 +142,11 @@ class SSHConfig (object):
Return a dict of config options with expanded substitutions
for a given hostname.
Please refer to man C{ssh_config} for the parameters that
Please refer to man ``ssh_config`` for the parameters that
are replaced.
@param config: the config for the hostname
@type hostname: dict
@param hostname: the hostname that the config belongs to
@type hostname: str
:param dict config: the config for the hostname
:param str hostname: the hostname that the config belongs to
"""
if 'hostname' in config:
@ -264,3 +205,57 @@ class SSHConfig (object):
else:
config[k] = config[k].replace(find, str(replace))
return config
class LazyFqdn(object):
"""
Returns the host's fqdn on request as string.
"""
def __init__(self, config, host=None):
self.fqdn = None
self.config = config
self.host = host
def __str__(self):
if self.fqdn is None:
#
# If the SSH config contains AddressFamily, use that when
# determining the local host's FQDN. Using socket.getfqdn() from
# the standard library is the most general solution, but can
# result in noticeable delays on some platforms when IPv6 is
# misconfigured or not available, as it calls getaddrinfo with no
# address family specified, so both IPv4 and IPv6 are checked.
#
# Handle specific option
fqdn = None
address_family = self.config.get('addressfamily', 'any').lower()
if address_family != 'any':
try:
family = socket.AF_INET if address_family == 'inet' \
else socket.AF_INET6
results = socket.getaddrinfo(
self.host,
None,
family,
socket.SOCK_DGRAM,
socket.IPPROTO_IP,
socket.AI_CANONNAME
)
for res in results:
af, socktype, proto, canonname, sa = res
if canonname and '.' in canonname:
fqdn = canonname
break
# giaerror -> socket.getaddrinfo() can't resolve self.host
# (which is from socket.gethostname()). Fall back to the
# getfqdn() call below.
except socket.gaierror:
pass
# Handle 'any' / unspecified
if fqdn is None:
fqdn = socket.getfqdn()
# Cache
self.fqdn = fqdn
return self.fqdn

14
paramiko/dsskey.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
L{DSSKey}
DSS keys.
"""
from Crypto.PublicKey import DSA
@ -153,13 +153,11 @@ class DSSKey (PKey):
Generate a new private DSS key. This factory function can be used to
generate a new host key or authentication key.
@param bits: number of bits the generated key should be.
@type bits: int
@param progress_func: an optional function to call at key points in
key generation (used by C{pyCrypto.PublicKey}).
@type progress_func: function
@return: new private key
@rtype: L{DSSKey}
:param int bits: number of bits the generated key should be.
:param function progress_func:
an optional function to call at key points in key generation (used
by ``pyCrypto.PublicKey``).
:return: new `.DSSKey` private key
"""
dsa = DSA.generate(bits, rng.read, progress_func)
key = DSSKey(vals=(dsa.p, dsa.q, dsa.g, dsa.y))

106
paramiko/file.py
View File

@ -16,16 +16,12 @@
# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
BufferedFile.
"""
from cStringIO import StringIO
class BufferedFile (object):
"""
Reusable base class to implement python-style file buffering around a
Reusable base class to implement Python-style file buffering around a
simpler stream.
"""
@ -67,10 +63,7 @@ class BufferedFile (object):
file. This iterator happens to return the file itself, since a file is
its own iterator.
@raise ValueError: if the file is closed.
@return: an interator.
@rtype: iterator
:raises ValueError: if the file is closed.
"""
if self._closed:
raise ValueError('I/O operation on closed file')
@ -94,14 +87,13 @@ class BufferedFile (object):
def next(self):
"""
Returns the next line from the input, or raises L{StopIteration} when
EOF is hit. Unlike python file objects, it's okay to mix calls to
C{next} and L{readline}.
Returns the next line from the input, or raises
`~exceptions.StopIteration` when EOF is hit. Unlike Python file
objects, it's okay to mix calls to `next` and `readline`.
@raise StopIteration: when the end of the file is reached.
:raises StopIteration: when the end of the file is reached.
@return: a line read from the file.
@rtype: str
:return: a line (`str`) read from the file.
"""
line = self.readline()
if not line:
@ -110,15 +102,14 @@ class BufferedFile (object):
def read(self, size=None):
"""
Read at most C{size} bytes from the file (less if we hit the end of the
file first). If the C{size} argument is negative or omitted, read all
Read at most ``size`` bytes from the file (less if we hit the end of the
file first). If the ``size`` argument is negative or omitted, read all
the remaining data in the file.
@param size: maximum number of bytes to read
@type size: int
@return: data read from the file, or an empty string if EOF was
:param int size: maximum number of bytes to read
:return:
data read from the file (as a `str`), or an empty string if EOF was
encountered immediately
@rtype: str
"""
if self._closed:
raise IOError('File is closed')
@ -171,14 +162,14 @@ class BufferedFile (object):
incomplete line may be returned. An empty string is returned only when
EOF is encountered immediately.
@note: Unlike stdio's C{fgets()}, the returned string contains null
characters (C{'\\0'}) if they occurred in the input.
.. note::
Unlike stdio's ``fgets``, the returned string contains null
characters (``'\\0'``) if they occurred in the input.
@param size: maximum length of returned string.
@type size: int
@return: next line of the file, or an empty string if the end of the
:param int size: maximum length of returned string.
:return:
next line of the file (`str`), or an empty string if the end of the
file has been reached.
@rtype: str
"""
# it's almost silly how complex this function is.
if self._closed:
@ -243,15 +234,13 @@ class BufferedFile (object):
def readlines(self, sizehint=None):
"""
Read all remaining lines using L{readline} and return them as a list.
If the optional C{sizehint} argument is present, instead of reading up
Read all remaining lines using `readline` and return them as a list.
If the optional ``sizehint`` argument is present, instead of reading up
to EOF, whole lines totalling approximately sizehint bytes (possibly
after rounding up to an internal buffer size) are read.
@param sizehint: desired maximum number of bytes to read.
@type sizehint: int
@return: list of lines read from the file.
@rtype: list
:param int sizehint: desired maximum number of bytes to read.
:return: `list` of lines read from the file.
"""
lines = []
bytes = 0
@ -267,21 +256,20 @@ class BufferedFile (object):
def seek(self, offset, whence=0):
"""
Set the file's current position, like stdio's C{fseek}. Not all file
Set the file's current position, like stdio's ``fseek``. Not all file
objects support seeking.
@note: If a file is opened in append mode (C{'a'} or C{'a+'}), any seek
.. note:: If a file is opened in append mode (``'a'`` or ``'a+'``), any seek
operations will be undone at the next write (as the file position
will move back to the end of the file).
@param offset: position to move to within the file, relative to
C{whence}.
@type offset: int
@param whence: type of movement: 0 = absolute; 1 = relative to the
current position; 2 = relative to the end of the file.
@type whence: int
:param int offset:
position to move to within the file, relative to ``whence``.
:param int whence:
type of movement: 0 = absolute; 1 = relative to the current
position; 2 = relative to the end of the file.
@raise IOError: if the file doesn't support random access.
:raises IOError: if the file doesn't support random access.
"""
raise IOError('File does not support seeking.')
@ -291,20 +279,18 @@ class BufferedFile (object):
useful if the underlying file doesn't support random access, or was
opened in append mode.
@return: file position (in bytes).
@rtype: int
:return: file position (`number <int>` of bytes).
"""
return self._pos
def write(self, data):
"""
Write data to the file. If write buffering is on (C{bufsize} was
Write data to the file. If write buffering is on (``bufsize`` was
specified and non-zero), some or all of the data may not actually be
written yet. (Use L{flush} or L{close} to force buffered data to be
written yet. (Use `flush` or `close` to force buffered data to be
written out.)
@param data: data to write.
@type data: str
:param str data: data to write
"""
if self._closed:
raise IOError('File is closed')
@ -334,11 +320,10 @@ class BufferedFile (object):
"""
Write a sequence of strings to the file. The sequence can be any
iterable object producing strings, typically a list of strings. (The
name is intended to match L{readlines}; C{writelines} does not add line
name is intended to match `readlines`; `writelines` does not add line
separators.)
@param sequence: an iterable sequence of strings.
@type sequence: sequence
:param iterable sequence: an iterable sequence of strings.
"""
for line in sequence:
self.write(line)
@ -346,11 +331,8 @@ class BufferedFile (object):
def xreadlines(self):
"""
Identical to C{iter(f)}. This is a deprecated file interface that
predates python iterator support.
@return: an iterator.
@rtype: iterator
Identical to ``iter(f)``. This is a deprecated file interface that
predates Python iterator support.
"""
return self
@ -364,25 +346,25 @@ class BufferedFile (object):
def _read(self, size):
"""
I{(subclass override)}
Read data from the stream. Return C{None} or raise C{EOFError} to
(subclass override)
Read data from the stream. Return ``None`` or raise ``EOFError`` to
indicate EOF.
"""
raise EOFError()
def _write(self, data):
"""
I{(subclass override)}
(subclass override)
Write data into the stream.
"""
raise IOError('write not implemented')
def _get_size(self):
"""
I{(subclass override)}
Return the size of the file. This is called from within L{_set_mode}
(subclass override)
Return the size of the file. This is called from within `_set_mode`
if the file is opened in append mode, so the file position can be
tracked and L{seek} and L{tell} will work correctly. If the file is
tracked and `seek` and `tell` will work correctly. If the file is
a stream that can't be randomly accessed, you don't need to override
this method,
"""

460
paramiko/hostkeys.py
View File

@ -16,9 +16,6 @@
# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
L{HostKeys}
"""
import base64
import binascii
@ -32,8 +29,225 @@ from paramiko.util import get_logger, constant_time_bytes_eq
from paramiko.ecdsakey import ECDSAKey
class InvalidHostKey(Exception):
class HostKeys (UserDict.DictMixin):
"""
Representation of an OpenSSH-style "known hosts" file. Host keys can be
read from one or more files, and then individual hosts can be looked up to
verify server keys during SSH negotiation.
A `.HostKeys` object can be treated like a dict; any dict lookup is
equivalent to calling `lookup`.
.. versionadded:: 1.5.3
"""
def __init__(self, filename=None):
"""
Create a new HostKeys object, optionally loading keys from an OpenSSH
style host-key file.
:param str filename: filename to load host keys from, or ``None``
"""
# emulate a dict of { hostname: { keytype: PKey } }
self._entries = []
if filename is not None:
self.load(filename)
def add(self, hostname, keytype, key):
"""
Add a host key entry to the table. Any existing entry for a
``(hostname, keytype)`` pair will be replaced.
:param str hostname: the hostname (or IP) to add
:param str keytype: key type (``"ssh-rsa"`` or ``"ssh-dss"``)
:param .PKey key: the key to add
"""
for e in self._entries:
if (hostname in e.hostnames) and (e.key.get_name() == keytype):
e.key = key
return
self._entries.append(HostKeyEntry([hostname], key))
def load(self, filename):
"""
Read a file of known SSH host keys, in the format used by OpenSSH.
This type of file unfortunately doesn't exist on Windows, but on
posix, it will usually be stored in
``os.path.expanduser("~/.ssh/known_hosts")``.
If this method is called multiple times, the host keys are merged,
not cleared. So multiple calls to `load` will just call `add`,
replacing any existing entries and adding new ones.
:param str filename: name of the file to read host keys from
:raises IOError: if there was an error reading the file
"""
f = open(filename, 'r')
for lineno, line in enumerate(f):
line = line.strip()
if (len(line) == 0) or (line[0] == '#'):
continue
e = HostKeyEntry.from_line(line, lineno)
if e is not None:
_hostnames = e.hostnames
for h in _hostnames:
if self.check(h, e.key):
e.hostnames.remove(h)
if len(e.hostnames):
self._entries.append(e)
f.close()
def save(self, filename):
"""
Save host keys into a file, in the format used by OpenSSH. The order of
keys in the file will be preserved when possible (if these keys were
loaded from a file originally). The single exception is that combined
lines will be split into individual key lines, which is arguably a bug.
:param str filename: name of the file to write
:raises IOError: if there was an error writing the file
.. versionadded:: 1.6.1
"""
f = open(filename, 'w')
for e in self._entries:
line = e.to_line()
if line:
f.write(line)
f.close()
def lookup(self, hostname):
"""
Find a hostkey entry for a given hostname or IP. If no entry is found,
``None`` is returned. Otherwise a dictionary of keytype to key is
returned. The keytype will be either ``"ssh-rsa"`` or ``"ssh-dss"``.
:param str hostname: the hostname (or IP) to lookup
:return: dict of `str` -> `.PKey` keys associated with this host (or ``None``)
"""
class SubDict (UserDict.DictMixin):
def __init__(self, hostname, entries, hostkeys):
self._hostname = hostname
self._entries = entries
self._hostkeys = hostkeys
def __getitem__(self, key):
for e in self._entries:
if e.key.get_name() == key:
return e.key
raise KeyError(key)
def __setitem__(self, key, val):
for e in self._entries:
if e.key is None:
continue
if e.key.get_name() == key:
# replace
e.key = val
break
else:
# add a new one
e = HostKeyEntry([hostname], val)
self._entries.append(e)
self._hostkeys._entries.append(e)
def keys(self):
return [e.key.get_name() for e in self._entries if e.key is not None]
entries = []
for e in self._entries:
for h in e.hostnames:
if h.startswith('|1|') and constant_time_bytes_eq(self.hash_host(hostname, h), h) or h == hostname:
entries.append(e)
if len(entries) == 0:
return None
return SubDict(hostname, entries, self)
def check(self, hostname, key):
"""
Return True if the given key is associated with the given hostname
in this dictionary.
:param str hostname: hostname (or IP) of the SSH server
:param .PKey key: the key to check
:return:
``True`` if the key is associated with the hostname; else ``False``
"""
k = self.lookup(hostname)
if k is None:
return False
host_key = k.get(key.get_name(), None)
if host_key is None:
return False
return str(host_key) == str(key)
def clear(self):
"""
Remove all host keys from the dictionary.
"""
self._entries = []
def __getitem__(self, key):
ret = self.lookup(key)
if ret is None:
raise KeyError(key)
return ret
def __setitem__(self, hostname, entry):
# don't use this please.
if len(entry) == 0:
self._entries.append(HostKeyEntry([hostname], None))
return
for key_type in entry.keys():
found = False
for e in self._entries:
if (hostname in e.hostnames) and (e.key.get_name() == key_type):
# replace
e.key = entry[key_type]
found = True
if not found:
self._entries.append(HostKeyEntry([hostname], entry[key_type]))
def keys(self):
# Python 2.4 sets would be nice here.
ret = []
for e in self._entries:
for h in e.hostnames:
if h not in ret:
ret.append(h)
return ret
def values(self):
ret = []
for k in self.keys():
ret.append(self.lookup(k))
return ret
def hash_host(hostname, salt=None):
"""
Return a "hashed" form of the hostname, as used by OpenSSH when storing
hashed hostnames in the known_hosts file.
:param str hostname: the hostname to hash
:param str salt: optional salt to use when hashing (must be 20 bytes long)
:return: the hashed hostname as a `str`
"""
if salt is None:
salt = rng.read(SHA.digest_size)
else:
if salt.startswith('|1|'):
salt = salt.split('|')[2]
salt = base64.decodestring(salt)
assert len(salt) == SHA.digest_size
hmac = HMAC.HMAC(salt, hostname, SHA).digest()
hostkey = '|1|%s|%s' % (base64.encodestring(salt), base64.encodestring(hmac))
return hostkey.replace('\n', '')
hash_host = staticmethod(hash_host)
class InvalidHostKey(Exception):
def __init__(self, line, exc):
self.line = line
self.exc = exc
@ -54,14 +268,13 @@ class HostKeyEntry:
"""
Parses the given line of text to find the names for the host,
the type of key, and the key data. The line is expected to be in the
format used by the openssh known_hosts file.
format used by the OpenSSH known_hosts file.
Lines are expected to not have leading or trailing whitespace.
We don't bother to check for comments or empty lines. All of
that should be taken care of before sending the line to us.
@param line: a line from an OpenSSH known_hosts file
@type line: str
:param str line: a line from an OpenSSH known_hosts file
"""
log = get_logger('paramiko.hostkeys')
fields = line.split(' ')
@ -107,236 +320,3 @@ class HostKeyEntry:
def __repr__(self):
return '<HostKeyEntry %r: %r>' % (self.hostnames, self.key)
class HostKeys (UserDict.DictMixin):
"""
Representation of an openssh-style "known hosts" file. Host keys can be
read from one or more files, and then individual hosts can be looked up to
verify server keys during SSH negotiation.
A HostKeys object can be treated like a dict; any dict lookup is equivalent
to calling L{lookup}.
@since: 1.5.3
"""
def __init__(self, filename=None):
"""
Create a new HostKeys object, optionally loading keys from an openssh
style host-key file.
@param filename: filename to load host keys from, or C{None}
@type filename: str
"""
# emulate a dict of { hostname: { keytype: PKey } }
self._entries = []
if filename is not None:
self.load(filename)
def add(self, hostname, keytype, key):
"""
Add a host key entry to the table. Any existing entry for a
C{(hostname, keytype)} pair will be replaced.
@param hostname: the hostname (or IP) to add
@type hostname: str
@param keytype: key type (C{"ssh-rsa"} or C{"ssh-dss"})
@type keytype: str
@param key: the key to add
@type key: L{PKey}
"""
for e in self._entries:
if (hostname in e.hostnames) and (e.key.get_name() == keytype):
e.key = key
return
self._entries.append(HostKeyEntry([hostname], key))
def load(self, filename):
"""
Read a file of known SSH host keys, in the format used by openssh.
This type of file unfortunately doesn't exist on Windows, but on
posix, it will usually be stored in
C{os.path.expanduser("~/.ssh/known_hosts")}.
If this method is called multiple times, the host keys are merged,
not cleared. So multiple calls to C{load} will just call L{add},
replacing any existing entries and adding new ones.
@param filename: name of the file to read host keys from
@type filename: str
@raise IOError: if there was an error reading the file
"""
f = open(filename, 'r')
for lineno, line in enumerate(f):
line = line.strip()
if (len(line) == 0) or (line[0] == '#'):
continue
e = HostKeyEntry.from_line(line, lineno)
if e is not None:
_hostnames = e.hostnames
for h in _hostnames:
if self.check(h, e.key):
e.hostnames.remove(h)
if len(e.hostnames):
self._entries.append(e)
f.close()
def save(self, filename):
"""
Save host keys into a file, in the format used by openssh. The order of
keys in the file will be preserved when possible (if these keys were
loaded from a file originally). The single exception is that combined
lines will be split into individual key lines, which is arguably a bug.
@param filename: name of the file to write
@type filename: str
@raise IOError: if there was an error writing the file
@since: 1.6.1
"""
f = open(filename, 'w')
for e in self._entries:
line = e.to_line()
if line:
f.write(line)
f.close()
def lookup(self, hostname):
"""
Find a hostkey entry for a given hostname or IP. If no entry is found,
C{None} is returned. Otherwise a dictionary of keytype to key is
returned. The keytype will be either C{"ssh-rsa"} or C{"ssh-dss"}.
@param hostname: the hostname (or IP) to lookup
@type hostname: str
@return: keys associated with this host (or C{None})
@rtype: dict(str, L{PKey})
"""
class SubDict (UserDict.DictMixin):
def __init__(self, hostname, entries, hostkeys):
self._hostname = hostname
self._entries = entries
self._hostkeys = hostkeys
def __getitem__(self, key):
for e in self._entries:
if e.key.get_name() == key:
return e.key
raise KeyError(key)
def __setitem__(self, key, val):
for e in self._entries:
if e.key is None:
continue
if e.key.get_name() == key:
# replace
e.key = val
break
else:
# add a new one
e = HostKeyEntry([hostname], val)
self._entries.append(e)
self._hostkeys._entries.append(e)
def keys(self):
return [e.key.get_name() for e in self._entries if e.key is not None]
entries = []
for e in self._entries:
for h in e.hostnames:
if h.startswith('|1|') and constant_time_bytes_eq(self.hash_host(hostname, h), h) or h == hostname:
entries.append(e)
if len(entries) == 0:
return None
return SubDict(hostname, entries, self)
def check(self, hostname, key):
"""
Return True if the given key is associated with the given hostname
in this dictionary.
@param hostname: hostname (or IP) of the SSH server
@type hostname: str
@param key: the key to check
@type key: L{PKey}
@return: C{True} if the key is associated with the hostname; C{False}
if not
@rtype: bool
"""
k = self.lookup(hostname)
if k is None:
return False
host_key = k.get(key.get_name(), None)
if host_key is None:
return False
return str(host_key) == str(key)
def clear(self):
"""
Remove all host keys from the dictionary.
"""
self._entries = []
def __getitem__(self, key):
ret = self.lookup(key)
if ret is None:
raise KeyError(key)
return ret
def __setitem__(self, hostname, entry):
# don't use this please.
if len(entry) == 0:
self._entries.append(HostKeyEntry([hostname], None))
return
for key_type in entry.keys():
found = False
for e in self._entries:
if (hostname in e.hostnames) and (e.key.get_name() == key_type):
# replace
e.key = entry[key_type]
found = True
if not found:
self._entries.append(HostKeyEntry([hostname], entry[key_type]))
def keys(self):
# python 2.4 sets would be nice here.
ret = []
for e in self._entries:
for h in e.hostnames:
if h not in ret:
ret.append(h)
return ret
def values(self):
ret = []
for k in self.keys():
ret.append(self.lookup(k))
return ret
def hash_host(hostname, salt=None):
"""
Return a "hashed" form of the hostname, as used by openssh when storing
hashed hostnames in the known_hosts file.
@param hostname: the hostname to hash
@type hostname: str
@param salt: optional salt to use when hashing (must be 20 bytes long)
@type salt: str
@return: the hashed hostname
@rtype: str
"""
if salt is None:
salt = rng.read(SHA.digest_size)
else:
if salt.startswith('|1|'):
salt = salt.split('|')[2]
salt = base64.decodestring(salt)
assert len(salt) == SHA.digest_size
hmac = HMAC.HMAC(salt, hostname, SHA).digest()
hostkey = '|1|%s|%s' % (base64.encodestring(salt), base64.encodestring(hmac))
return hostkey.replace('\n', '')
hash_host = staticmethod(hash_host)

2
paramiko/kex_gex.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
Variant on L{KexGroup1 <paramiko.kex_group1.KexGroup1>} where the prime "p" and
Variant on `KexGroup1 <paramiko.kex_group1.KexGroup1>` where the prime "p" and
generator "g" are provided by the server. A bit more work is required on the
client side, and a B{lot} more on the server side.
"""

2
paramiko/logging22.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
Stub out logging on python < 2.3.
Stub out logging on Python < 2.3.
"""

114
paramiko/message.py
View File

@ -28,9 +28,9 @@ from paramiko import util
class Message (object):
"""
An SSH2 I{Message} is a stream of bytes that encodes some combination of
strings, integers, bools, and infinite-precision integers (known in python
as I{long}s). This class builds or breaks down such a byte stream.
An SSH2 message is a stream of bytes that encodes some combination of
strings, integers, bools, and infinite-precision integers (known in Python
as longs). This class builds or breaks down such a byte stream.
Normally you don't need to deal with anything this low-level, but it's
exposed for people implementing custom extensions, or features that
@ -39,11 +39,11 @@ class Message (object):
def __init__(self, content=None):
"""
Create a new SSH2 Message.
Create a new SSH2 message.
@param content: the byte stream to use as the Message content (passed
in only when decomposing a Message).
@type content: string
:param str content:
the byte stream to use as the message content (passed in only when
decomposing a message).
"""
if content != None:
self.packet = cStringIO.StringIO(content)
@ -52,18 +52,13 @@ class Message (object):
def __str__(self):
"""
Return the byte stream content of this Message, as a string.
@return: the contents of this Message.
@rtype: string
Return the byte stream content of this message, as a string.
"""
return self.packet.getvalue()
def __repr__(self):
"""
Returns a string representation of this object, for debugging.
@rtype: string
"""
return 'paramiko.Message(' + repr(self.packet.getvalue()) + ')'
@ -76,11 +71,8 @@ class Message (object):
def get_remainder(self):
"""
Return the bytes of this Message that haven't already been parsed and
returned.
@return: a string of the bytes not parsed yet.
@rtype: string
Return the bytes (as a `str`) of this message that haven't already been
parsed and returned.
"""
position = self.packet.tell()
remainder = self.packet.read()
@ -89,12 +81,9 @@ class Message (object):
def get_so_far(self):
"""
Returns the bytes of this Message that have been parsed and returned.
The string passed into a Message's constructor can be regenerated by
concatenating C{get_so_far} and L{get_remainder}.
@return: a string of the bytes parsed so far.
@rtype: string
Returns the `str` bytes of this message that have been parsed and
returned. The string passed into a message's constructor can be
regenerated by concatenating ``get_so_far`` and `get_remainder`.
"""
position = self.packet.tell()
self.rewind()
@ -102,12 +91,10 @@ class Message (object):
def get_bytes(self, n):
"""
Return the next C{n} bytes of the Message, without decomposing into
an int, string, etc. Just the raw bytes are returned.
@return: a string of the next C{n} bytes of the Message, or a string
of C{n} zero bytes, if there aren't C{n} bytes remaining.
@rtype: string
Return the next ``n`` bytes of the message (as a `str`), without
decomposing into an int, decoded string, etc. Just the raw bytes are
returned. Returns a string of ``n`` zero bytes if there weren't ``n``
bytes remaining in the message.
"""
b = self.packet.read(n)
max_pad_size = 1<<20 # Limit padding to 1 MB
@ -117,21 +104,18 @@ class Message (object):
def get_byte(self):
"""
Return the next byte of the Message, without decomposing it. This
is equivalent to L{get_bytes(1)<get_bytes>}.
Return the next byte of the message, without decomposing it. This
is equivalent to `get_bytes(1) <get_bytes>`.
@return: the next byte of the Message, or C{'\000'} if there aren't
:return:
the next (`str`) byte of the message, or ``'\000'`` if there aren't
any bytes remaining.
@rtype: string
"""
return self.get_bytes(1)
def get_boolean(self):
"""
Fetch a boolean from the stream.
@return: C{True} or C{False} (from the Message).
@rtype: bool
"""
b = self.get_bytes(1)
return b != '\x00'
@ -140,8 +124,7 @@ class Message (object):
"""
Fetch an int from the stream.
@return: a 32-bit unsigned integer.
@rtype: int
:return: a 32-bit unsigned `int`.
"""
return struct.unpack('>I', self.get_bytes(4))[0]
@ -149,8 +132,7 @@ class Message (object):
"""
Fetch a 64-bit int from the stream.
@return: a 64-bit unsigned integer.
@rtype: long
:return: a 64-bit unsigned integer (`long`).
"""
return struct.unpack('>Q', self.get_bytes(8))[0]
@ -158,29 +140,23 @@ class Message (object):
"""
Fetch a long int (mpint) from the stream.
@return: an arbitrary-length integer.
@rtype: long
:return: an arbitrary-length integer (`long`).
"""
return util.inflate_long(self.get_string())
def get_string(self):
"""
Fetch a string from the stream. This could be a byte string and may
Fetch a `str` from the stream. This could be a byte string and may
contain unprintable characters. (It's not unheard of for a string to
contain another byte-stream Message.)
@return: a string.
@rtype: string
contain another byte-stream message.)
"""
return self.get_bytes(self.get_int())
def get_list(self):
"""
Fetch a list of strings from the stream. These are trivially encoded
as comma-separated values in a string.
@return: a list of strings.
@rtype: list of strings
Fetch a `list` of `strings <str>` from the stream.
These are trivially encoded as comma-separated values in a string.
"""
return self.get_string().split(',')
@ -188,8 +164,7 @@ class Message (object):
"""
Write bytes to the stream, without any formatting.
@param b: bytes to add
@type b: str
:param str b: bytes to add
"""
self.packet.write(b)
return self
@ -198,8 +173,7 @@ class Message (object):
"""
Write a single byte to the stream, without any formatting.
@param b: byte to add
@type b: str
:param str b: byte to add
"""
self.packet.write(b)
return self
@ -208,8 +182,7 @@ class Message (object):
"""
Add a boolean value to the stream.
@param b: boolean value to add
@type b: bool
:param bool b: boolean value to add
"""
if b:
self.add_byte('\x01')
@ -221,8 +194,7 @@ class Message (object):
"""
Add an integer to the stream.
@param n: integer to add
@type n: int
:param int n: integer to add
"""
self.packet.write(struct.pack('>I', n))
return self
@ -231,8 +203,7 @@ class Message (object):
"""
Add a 64-bit int to the stream.
@param n: long int to add
@type n: long
:param long n: long int to add
"""
self.packet.write(struct.pack('>Q', n))
return self
@ -242,8 +213,7 @@ class Message (object):
Add a long int to the stream, encoded as an infinite-precision
integer. This method only works on positive numbers.
@param z: long int to add
@type z: long
:param long z: long int to add
"""
self.add_string(util.deflate_long(z))
return self
@ -252,8 +222,7 @@ class Message (object):
"""
Add a string to the stream.
@param s: string to add
@type s: str
:param str s: string to add
"""
self.add_int(len(s))
self.packet.write(s)
@ -265,8 +234,7 @@ class Message (object):
a single string of values separated by commas. (Yes, really, that's
how SSH2 does it.)
@param l: list of strings to add
@type l: list(str)
:param list l: list of strings to add
"""
self.add_string(','.join(l))
return self
@ -292,11 +260,11 @@ class Message (object):
"""
Add a sequence of items to the stream. The values are encoded based
on their type: str, int, bool, list, or long.
.. warning::
Longs are encoded non-deterministically. Don't use this method.
@param seq: the sequence of items
@type seq: sequence
@bug: longs are encoded non-deterministically. Don't use this method.
:param seq: the sequence of items
"""
for item in seq:
self._add(item)

25
paramiko/packet.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
Packetizer.
Packet handling
"""
import errno
@ -103,7 +103,7 @@ class Packetizer (object):
def set_log(self, log):
"""
Set the python log object to use for logging.
Set the Python log object to use for logging.
"""
self.__logger = log
@ -167,17 +167,15 @@ class Packetizer (object):
def need_rekey(self):
"""
Returns C{True} if a new set of keys needs to be negotiated. This
Returns ``True`` if a new set of keys needs to be negotiated. This
will be triggered during a packet read or write, so it should be
checked after every read or write, or at least after every few.
@return: C{True} if a new set of keys needs to be negotiated
"""
return self.__need_rekey
def set_keepalive(self, interval, callback):
"""
Turn on/off the callback keepalive. If C{interval} seconds pass with
Turn on/off the callback keepalive. If ``interval`` seconds pass with
no data read from or written to the socket, the callback will be
executed and the timer will be reset.
"""
@ -189,12 +187,11 @@ class Packetizer (object):
"""
Read as close to N bytes as possible, blocking as long as necessary.
@param n: number of bytes to read
@type n: int
@return: the data read
@rtype: str
@raise EOFError: if the socket was closed before all the bytes could
be read
:param int n: number of bytes to read
:return: the data read, as a `str`
:raises EOFError:
if the socket was closed before all the bytes could be read
"""
out = ''
# handle over-reading from reading the banner line
@ -331,8 +328,8 @@ class Packetizer (object):
Only one thread should ever be in this function (no other locking is
done).
@raise SSHException: if the packet is mangled
@raise NeedRekeyException: if the transport should rekey
:raises SSHException: if the packet is mangled
:raises NeedRekeyException: if the transport should rekey
"""
header = self.read_all(self.__block_size_in, check_rekey=True)
if self.__block_engine_in != None:

7
paramiko/pipe.py
View File

@ -17,11 +17,12 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
Abstraction of a one-way pipe where the read end can be used in select().
Normally this is trivial, but Windows makes it nearly impossible.
Abstraction of a one-way pipe where the read end can be used in
`select.select`. Normally this is trivial, but Windows makes it nearly
impossible.
The pipe acts like an Event, which can be set or cleared. When set, the pipe
will trigger as readable in select().
will trigger as readable in `select <select.select>`.
"""
import sys

188
paramiko/pkey.py
View File

@ -47,30 +47,26 @@ class PKey (object):
def __init__(self, msg=None, data=None):
"""
Create a new instance of this public key type. If C{msg} is given,
Create a new instance of this public key type. If ``msg`` is given,
the key's public part(s) will be filled in from the message. If
C{data} is given, the key's public part(s) will be filled in from
``data`` is given, the key's public part(s) will be filled in from
the string.
@param msg: an optional SSH L{Message} containing a public key of this
type.
@type msg: L{Message}
@param data: an optional string containing a public key of this type
@type data: str
:param .Message msg:
an optional SSH `.Message` containing a public key of this type.
:param str data: an optional string containing a public key of this type
@raise SSHException: if a key cannot be created from the C{data} or
C{msg} given, or no key was passed in.
:raises SSHException:
if a key cannot be created from the ``data`` or ``msg`` given, or
no key was passed in.
"""
pass
def __str__(self):
"""
Return a string of an SSH L{Message} made up of the public part(s) of
this key. This string is suitable for passing to L{__init__} to
Return a string of an SSH `.Message` made up of the public part(s) of
this key. This string is suitable for passing to `__init__` to
re-create the key object later.
@return: string representation of an SSH key message.
@rtype: str
"""
return ''
@ -81,10 +77,7 @@ class PKey (object):
of the key are compared, so a public key will compare equal to its
corresponding private key.
@param other: key to compare to.
@type other: L{PKey}
@return: 0 if the two keys are equivalent, non-0 otherwise.
@rtype: int
:param .Pkey other: key to compare to.
"""
hs = hash(self)
ho = hash(other)
@ -96,9 +89,9 @@ class PKey (object):
"""
Return the name of this private key implementation.
@return: name of this private key type, in SSH terminology (for
example, C{"ssh-rsa"}).
@rtype: str
:return:
name of this private key type, in SSH terminology, as a `str` (for
example, ``"ssh-rsa"``).
"""
return ''
@ -107,18 +100,14 @@ class PKey (object):
Return the number of significant bits in this key. This is useful
for judging the relative security of a key.
@return: bits in the key.
@rtype: int
:return: bits in the key (as an `int`)
"""
return 0
def can_sign(self):
"""
Return C{True} if this key has the private part necessary for signing
Return ``True`` if this key has the private part necessary for signing
data.
@return: C{True} if this is a private key.
@rtype: bool
"""
return False
@ -127,9 +116,9 @@ class PKey (object):
Return an MD5 fingerprint of the public part of this key. Nothing
secret is revealed.
@return: a 16-byte string (binary) of the MD5 fingerprint, in SSH
:return:
a 16-byte `string <str>` (binary) of the MD5 fingerprint, in SSH
format.
@rtype: str
"""
return MD5.new(str(self)).digest()
@ -139,22 +128,18 @@ class PKey (object):
secret is revealed. This format is compatible with that used to store
public key files or recognized host keys.
@return: a base64 string containing the public part of the key.
@rtype: str
:return: a base64 `string <str>` containing the public part of the key.
"""
return base64.encodestring(str(self)).replace('\n', '')
def sign_ssh_data(self, rng, data):
"""
Sign a blob of data with this private key, and return a L{Message}
Sign a blob of data with this private key, and return a `.Message`
representing an SSH signature message.
@param rng: a secure random number generator.
@type rng: L{Crypto.Util.rng.RandomPool}
@param data: the data to sign.
@type data: str
@return: an SSH signature message.
@rtype: L{Message}
:param .Crypto.Util.rng.RandomPool rng: a secure random number generator.
:param str data: the data to sign.
:return: an SSH signature `message <.Message>`.
"""
return ''
@ -163,37 +148,31 @@ class PKey (object):
Given a blob of data, and an SSH message representing a signature of
that data, verify that it was signed with this key.
@param data: the data that was signed.
@type data: str
@param msg: an SSH signature message
@type msg: L{Message}
@return: C{True} if the signature verifies correctly; C{False}
otherwise.
@rtype: boolean
:param str data: the data that was signed.
:param .Message msg: an SSH signature message
:return:
``True`` if the signature verifies correctly; ``False`` otherwise.
"""
return False
def from_private_key_file(cls, filename, password=None):
"""
Create a key object by reading a private key file. If the private
key is encrypted and C{password} is not C{None}, the given password
will be used to decrypt the key (otherwise L{PasswordRequiredException}
is thrown). Through the magic of python, this factory method will
exist in all subclasses of PKey (such as L{RSAKey} or L{DSSKey}), but
key is encrypted and ``password`` is not ``None``, the given password
will be used to decrypt the key (otherwise `.PasswordRequiredException`
is thrown). Through the magic of Python, this factory method will
exist in all subclasses of PKey (such as `.RSAKey` or `.DSSKey`), but
is useless on the abstract PKey class.
@param filename: name of the file to read
@type filename: str
@param password: an optional password to use to decrypt the key file,
:param str filename: name of the file to read
:param str password: an optional password to use to decrypt the key file,
if it's encrypted
@type password: str
@return: a new key object based on the given private key
@rtype: L{PKey}
:return: a new `.PKey` based on the given private key
@raise IOError: if there was an error reading the file
@raise PasswordRequiredException: if the private key file is
encrypted, and C{password} is C{None}
@raise SSHException: if the key file is invalid
:raises IOError: if there was an error reading the file
:raises PasswordRequiredException: if the private key file is
encrypted, and ``password`` is ``None``
:raises SSHException: if the key file is invalid
"""
key = cls(filename=filename, password=password)
return key
@ -202,22 +181,19 @@ class PKey (object):
def from_private_key(cls, file_obj, password=None):
"""
Create a key object by reading a private key from a file (or file-like)
object. If the private key is encrypted and C{password} is not C{None},
object. If the private key is encrypted and ``password`` is not ``None``,
the given password will be used to decrypt the key (otherwise
L{PasswordRequiredException} is thrown).
`.PasswordRequiredException` is thrown).
@param file_obj: the file to read from
@type file_obj: file
@param password: an optional password to use to decrypt the key, if it's
encrypted
@type password: str
@return: a new key object based on the given private key
@rtype: L{PKey}
:param file file_obj: the file to read from
:param str password:
an optional password to use to decrypt the key, if it's encrypted
:return: a new `.PKey` based on the given private key
@raise IOError: if there was an error reading the key
@raise PasswordRequiredException: if the private key file is encrypted,
and C{password} is C{None}
@raise SSHException: if the key file is invalid
:raises IOError: if there was an error reading the key
:raises PasswordRequiredException: if the private key file is encrypted,
and ``password`` is ``None``
:raises SSHException: if the key file is invalid
"""
key = cls(file_obj=file_obj, password=password)
return key
@ -226,55 +202,49 @@ class PKey (object):
def write_private_key_file(self, filename, password=None):
"""
Write private key contents into a file. If the password is not
C{None}, the key is encrypted before writing.
``None``, the key is encrypted before writing.
@param filename: name of the file to write
@type filename: str
@param password: an optional password to use to encrypt the key file
@type password: str
:param str filename: name of the file to write
:param str password:
an optional password to use to encrypt the key file
@raise IOError: if there was an error writing the file
@raise SSHException: if the key is invalid
:raises IOError: if there was an error writing the file
:raises SSHException: if the key is invalid
"""
raise Exception('Not implemented in PKey')
def write_private_key(self, file_obj, password=None):
"""
Write private key contents into a file (or file-like) object. If the
password is not C{None}, the key is encrypted before writing.
password is not ``None``, the key is encrypted before writing.
@param file_obj: the file object to write into
@type file_obj: file
@param password: an optional password to use to encrypt the key
@type password: str
:param file file_obj: the file object to write into
:param str password: an optional password to use to encrypt the key
@raise IOError: if there was an error writing to the file
@raise SSHException: if the key is invalid
:raises IOError: if there was an error writing to the file
:raises SSHException: if the key is invalid
"""
raise Exception('Not implemented in PKey')
def _read_private_key_file(self, tag, filename, password=None):
"""
Read an SSH2-format private key file, looking for a string of the type
C{"BEGIN xxx PRIVATE KEY"} for some C{xxx}, base64-decode the text we
``"BEGIN xxx PRIVATE KEY"`` for some ``xxx``, base64-decode the text we
find, and return it as a string. If the private key is encrypted and
C{password} is not C{None}, the given password will be used to decrypt
the key (otherwise L{PasswordRequiredException} is thrown).
``password`` is not ``None``, the given password will be used to decrypt
the key (otherwise `.PasswordRequiredException` is thrown).
@param tag: C{"RSA"} or C{"DSA"}, the tag used to mark the data block.
@type tag: str
@param filename: name of the file to read.
@type filename: str
@param password: an optional password to use to decrypt the key file,
if it's encrypted.
@type password: str
@return: data blob that makes up the private key.
@rtype: str
:param str tag: ``"RSA"`` or ``"DSA"``, the tag used to mark the data block.
:param str filename: name of the file to read.
:param str password:
an optional password to use to decrypt the key file, if it's
encrypted.
:return: data blob (`str`) that makes up the private key.
@raise IOError: if there was an error reading the file.
@raise PasswordRequiredException: if the private key file is
encrypted, and C{password} is C{None}.
@raise SSHException: if the key file is invalid.
:raises IOError: if there was an error reading the file.
:raises PasswordRequiredException: if the private key file is
encrypted, and ``password`` is ``None``.
:raises SSHException: if the key file is invalid.
"""
f = open(filename, 'r')
data = self._read_private_key(tag, f, password)
@ -335,16 +305,12 @@ class PKey (object):
a trivially-encoded format (base64) which is completely insecure. If
a password is given, DES-EDE3-CBC is used.
@param tag: C{"RSA"} or C{"DSA"}, the tag used to mark the data block.
@type tag: str
@param filename: name of the file to write.
@type filename: str
@param data: data blob that makes up the private key.
@type data: str
@param password: an optional password to use to encrypt the file.
@type password: str
:param str tag: ``"RSA"`` or ``"DSA"``, the tag used to mark the data block.
:param file filename: name of the file to write.
:param str data: data blob that makes up the private key.
:param str password: an optional password to use to encrypt the file.
@raise IOError: if there was an error writing the file.
:raises IOError: if there was an error writing the file.
"""
f = open(filename, 'w', 0600)
# grrr... the mode doesn't always take hold

2
paramiko/primes.py
View File

@ -109,7 +109,7 @@ class ModulusPack (object):
def read_file(self, filename):
"""
@raise IOError: passed from any file operations that fail.
:raises IOError: passed from any file operations that fail.
"""
self.pack = {}
f = open(filename, 'r')

21
paramiko/proxy.py
View File

@ -16,9 +16,6 @@
# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
L{ProxyCommand}.
"""
from datetime import datetime
import os
@ -36,18 +33,17 @@ class ProxyCommand(object):
Wraps a subprocess running ProxyCommand-driven programs.
This class implements a the socket-like interface needed by the
L{Transport} and L{Packetizer} classes. Using this class instead of a
`.Transport` and `.Packetizer` classes. Using this class instead of a
regular socket makes it possible to talk with a Popen'd command that will
proxy traffic between the client and a server hosted in another machine.
"""
def __init__(self, command_line):
"""
Create a new CommandProxy instance. The instance created by this
class can be passed as an argument to the L{Transport} class.
class can be passed as an argument to the `.Transport` class.
@param command_line: the command that should be executed and
used as the proxy.
@type command_line: str
:param str command_line:
the command that should be executed and used as the proxy.
"""
self.cmd = shlsplit(command_line)
self.process = Popen(self.cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE)
@ -59,8 +55,7 @@ class ProxyCommand(object):
Write the content received from the SSH client to the standard
input of the forked command.
@param content: string to be sent to the forked command
@type content: str
:param str content: string to be sent to the forked command
"""
try:
self.process.stdin.write(content)
@ -76,11 +71,9 @@ class ProxyCommand(object):
"""
Read from the standard output of the forked program.
@param size: how many chars should be read
@type size: int
:param int size: how many chars should be read
@return: the length of the read content
@rtype: int
:return: the length of the read content, as an `int`
"""
try:
start = datetime.now()

17
paramiko/resource.py
View File

@ -28,13 +28,13 @@ class ResourceManager (object):
A registry of objects and resources that should be closed when those
objects are deleted.
This is meant to be a safer alternative to python's C{__del__} method,
This is meant to be a safer alternative to Python's ``__del__`` method,
which can cause reference cycles to never be collected. Objects registered
with the ResourceManager can be collected but still free resources when
they die.
Resources are registered using L{register}, and when an object is garbage
collected, each registered resource is closed by having its C{close()}
Resources are registered using `register`, and when an object is garbage
collected, each registered resource is closed by having its ``close()``
method called. Multiple resources may be registered per object, but a
resource will only be closed once, even if multiple objects register it.
(The last object to register it wins.)
@ -47,14 +47,13 @@ class ResourceManager (object):
"""
Register a resource to be closed with an object is collected.
When the given C{obj} is garbage-collected by the python interpreter,
the C{resource} will be closed by having its C{close()} method called.
When the given ``obj`` is garbage-collected by the Python interpreter,
the ``resource`` will be closed by having its ``close()`` method called.
Any exceptions are ignored.
@param obj: the object to track
@type obj: object
@param resource: the resource to close when the object is collected
@type resource: object
:param object obj: the object to track
:param object resource:
the resource to close when the object is collected
"""
def callback(ref):
try:

14
paramiko/rsakey.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
L{RSAKey}
RSA keys.
"""
from Crypto.PublicKey import RSA
@ -129,13 +129,11 @@ class RSAKey (PKey):
Generate a new private RSA key. This factory function can be used to
generate a new host key or authentication key.
@param bits: number of bits the generated key should be.
@type bits: int
@param progress_func: an optional function to call at key points in
key generation (used by C{pyCrypto.PublicKey}).
@type progress_func: function
@return: new private key
@rtype: L{RSAKey}
:param int bits: number of bits the generated key should be.
:param function progress_func:
an optional function to call at key points in key generation (used
by ``pyCrypto.PublicKey``).
:return: new `.RSAKey` private key
"""
rsa = RSA.generate(bits, rng.read, progress_func)
key = RSAKey(vals=(rsa.e, rsa.n))

567
paramiko/server.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
L{ServerInterface} is an interface to override for server support.
`.ServerInterface` is an interface to override for server support.
"""
import threading
@ -25,54 +25,12 @@ from paramiko.common import *
from paramiko import util
class InteractiveQuery (object):
"""
A query (set of prompts) for a user during interactive authentication.
"""
def __init__(self, name='', instructions='', *prompts):
"""
Create a new interactive query to send to the client. The name and
instructions are optional, but are generally displayed to the end
user. A list of prompts may be included, or they may be added via
the L{add_prompt} method.
@param name: name of this query
@type name: str
@param instructions: user instructions (usually short) about this query
@type instructions: str
@param prompts: one or more authentication prompts
@type prompts: str
"""
self.name = name
self.instructions = instructions
self.prompts = []
for x in prompts:
if (type(x) is str) or (type(x) is unicode):
self.add_prompt(x)
else:
self.add_prompt(x[0], x[1])
def add_prompt(self, prompt, echo=True):
"""
Add a prompt to this query. The prompt should be a (reasonably short)
string. Multiple prompts can be added to the same query.
@param prompt: the user prompt
@type prompt: str
@param echo: C{True} (default) if the user's response should be echoed;
C{False} if not (for a password or similar)
@type echo: bool
"""
self.prompts.append((prompt, echo))
class ServerInterface (object):
"""
This class defines an interface for controlling the behavior of paramiko
This class defines an interface for controlling the behavior of Paramiko
in server mode.
Methods on this class are called from paramiko's primary thread, so you
Methods on this class are called from Paramiko's primary thread, so you
shouldn't do too much work in them. (Certainly nothing that blocks or
sleeps.)
"""
@ -80,7 +38,7 @@ class ServerInterface (object):
def check_channel_request(self, kind, chanid):
"""
Determine if a channel request of a given type will be granted, and
return C{OPEN_SUCCEEDED} or an error code. This method is
return ``OPEN_SUCCEEDED`` or an error code. This method is
called in server mode when the client requests a channel, after
authentication is complete.
@ -88,37 +46,37 @@ class ServerInterface (object):
useless), you should also override some of the channel request methods
below, which are used to determine which services will be allowed on
a given channel:
- L{check_channel_pty_request}
- L{check_channel_shell_request}
- L{check_channel_subsystem_request}
- L{check_channel_window_change_request}
- L{check_channel_x11_request}
- L{check_channel_forward_agent_request}
The C{chanid} parameter is a small number that uniquely identifies the
channel within a L{Transport}. A L{Channel} object is not created
unless this method returns C{OPEN_SUCCEEDED} -- once a
L{Channel} object is created, you can call L{Channel.get_id} to
- `check_channel_pty_request`
- `check_channel_shell_request`
- `check_channel_subsystem_request`
- `check_channel_window_change_request`
- `check_channel_x11_request`
- `check_channel_forward_agent_request`
The ``chanid`` parameter is a small number that uniquely identifies the
channel within a `.Transport`. A `.Channel` object is not created
unless this method returns ``OPEN_SUCCEEDED`` -- once a
`.Channel` object is created, you can call `.Channel.get_id` to
retrieve the channel ID.
The return value should either be C{OPEN_SUCCEEDED} (or
C{0}) to allow the channel request, or one of the following error
The return value should either be ``OPEN_SUCCEEDED`` (or
``0``) to allow the channel request, or one of the following error
codes to reject it:
- C{OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED}
- C{OPEN_FAILED_CONNECT_FAILED}
- C{OPEN_FAILED_UNKNOWN_CHANNEL_TYPE}
- C{OPEN_FAILED_RESOURCE_SHORTAGE}
- ``OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED``
- ``OPEN_FAILED_CONNECT_FAILED``
- ``OPEN_FAILED_UNKNOWN_CHANNEL_TYPE``
- ``OPEN_FAILED_RESOURCE_SHORTAGE``
The default implementation always returns
C{OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED}.
``OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED``.
@param kind: the kind of channel the client would like to open
(usually C{"session"}).
@type kind: str
@param chanid: ID of the channel
@type chanid: int
@return: a success or failure code (listed above)
@rtype: int
:param str kind:
the kind of channel the client would like to open (usually
``"session"``).
:param int chanid: ID of the channel
:return: an `int` success or failure code (listed above)
"""
return OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED
@ -129,15 +87,13 @@ class ServerInterface (object):
of authentication methods that might be successful.
The "list" is actually a string of comma-separated names of types of
authentication. Possible values are C{"password"}, C{"publickey"},
and C{"none"}.
authentication. Possible values are ``"password"``, ``"publickey"``,
and ``"none"``.
The default implementation always returns C{"password"}.
The default implementation always returns ``"password"``.
@param username: the username requesting authentication.
@type username: str
@return: a comma-separated list of authentication types
@rtype: str
:param str username: the username requesting authentication.
:return: a comma-separated `str` of authentication types
"""
return 'password'
@ -146,17 +102,17 @@ class ServerInterface (object):
Determine if a client may open channels with no (further)
authentication.
Return L{AUTH_FAILED} if the client must authenticate, or
L{AUTH_SUCCESSFUL} if it's okay for the client to not
Return `.AUTH_FAILED` if the client must authenticate, or
`.AUTH_SUCCESSFUL` if it's okay for the client to not
authenticate.
The default implementation always returns L{AUTH_FAILED}.
The default implementation always returns `.AUTH_FAILED`.
@param username: the username of the client.
@type username: str
@return: L{AUTH_FAILED} if the authentication fails;
L{AUTH_SUCCESSFUL} if it succeeds.
@rtype: int
:param str username: the username of the client.
:return:
`.AUTH_FAILED` if the authentication fails; `.AUTH_SUCCESSFUL` if
it succeeds.
:rtype: int
"""
return AUTH_FAILED
@ -165,25 +121,23 @@ class ServerInterface (object):
Determine if a given username and password supplied by the client is
acceptable for use in authentication.
Return L{AUTH_FAILED} if the password is not accepted,
L{AUTH_SUCCESSFUL} if the password is accepted and completes
the authentication, or L{AUTH_PARTIALLY_SUCCESSFUL} if your
Return `.AUTH_FAILED` if the password is not accepted,
`.AUTH_SUCCESSFUL` if the password is accepted and completes
the authentication, or `.AUTH_PARTIALLY_SUCCESSFUL` if your
authentication is stateful, and this key is accepted for
authentication, but more authentication is required. (In this latter
case, L{get_allowed_auths} will be called to report to the client what
case, `get_allowed_auths` will be called to report to the client what
options it has for continuing the authentication.)
The default implementation always returns L{AUTH_FAILED}.
The default implementation always returns `.AUTH_FAILED`.
@param username: the username of the authenticating client.
@type username: str
@param password: the password given by the client.
@type password: str
@return: L{AUTH_FAILED} if the authentication fails;
L{AUTH_SUCCESSFUL} if it succeeds;
L{AUTH_PARTIALLY_SUCCESSFUL} if the password auth is
:param str username: the username of the authenticating client.
:param str password: the password given by the client.
:return:
`.AUTH_FAILED` if the authentication fails; `.AUTH_SUCCESSFUL` if
it succeeds; `.AUTH_PARTIALLY_SUCCESSFUL` if the password auth is
successful, but authentication must continue.
@rtype: int
:rtype: int
"""
return AUTH_FAILED
@ -194,29 +148,28 @@ class ServerInterface (object):
check the username and key and decide if you would accept a signature
made using this key.
Return L{AUTH_FAILED} if the key is not accepted,
L{AUTH_SUCCESSFUL} if the key is accepted and completes the
authentication, or L{AUTH_PARTIALLY_SUCCESSFUL} if your
Return `.AUTH_FAILED` if the key is not accepted,
`.AUTH_SUCCESSFUL` if the key is accepted and completes the
authentication, or `.AUTH_PARTIALLY_SUCCESSFUL` if your
authentication is stateful, and this password is accepted for
authentication, but more authentication is required. (In this latter
case, L{get_allowed_auths} will be called to report to the client what
case, `get_allowed_auths` will be called to report to the client what
options it has for continuing the authentication.)
Note that you don't have to actually verify any key signtature here.
If you're willing to accept the key, paramiko will do the work of
If you're willing to accept the key, Paramiko will do the work of
verifying the client's signature.
The default implementation always returns L{AUTH_FAILED}.
The default implementation always returns `.AUTH_FAILED`.
@param username: the username of the authenticating client
@type username: str
@param key: the key object provided by the client
@type key: L{PKey <pkey.PKey>}
@return: L{AUTH_FAILED} if the client can't authenticate
with this key; L{AUTH_SUCCESSFUL} if it can;
L{AUTH_PARTIALLY_SUCCESSFUL} if it can authenticate with
this key but must continue with authentication
@rtype: int
:param str username: the username of the authenticating client
:param .PKey key: the key object provided by the client
:return:
`.AUTH_FAILED` if the client can't authenticate with this key;
`.AUTH_SUCCESSFUL` if it can; `.AUTH_PARTIALLY_SUCCESSFUL` if it
can authenticate with this key but must continue with
authentication
:rtype: int
"""
return AUTH_FAILED
@ -224,24 +177,24 @@ class ServerInterface (object):
"""
Begin an interactive authentication challenge, if supported. You
should override this method in server mode if you want to support the
C{"keyboard-interactive"} auth type, which requires you to send a
``"keyboard-interactive"`` auth type, which requires you to send a
series of questions for the client to answer.
Return L{AUTH_FAILED} if this auth method isn't supported. Otherwise,
you should return an L{InteractiveQuery} object containing the prompts
Return `.AUTH_FAILED` if this auth method isn't supported. Otherwise,
you should return an `.InteractiveQuery` object containing the prompts
and instructions for the user. The response will be sent via a call
to L{check_auth_interactive_response}.
to `check_auth_interactive_response`.
The default implementation always returns L{AUTH_FAILED}.
The default implementation always returns `.AUTH_FAILED`.
@param username: the username of the authenticating client
@type username: str
@param submethods: a comma-separated list of methods preferred by the
client (usually empty)
@type submethods: str
@return: L{AUTH_FAILED} if this auth method isn't supported; otherwise
an object containing queries for the user
@rtype: int or L{InteractiveQuery}
:param str username: the username of the authenticating client
:param str submethods:
a comma-separated list of methods preferred by the client (usually
empty)
:return:
`.AUTH_FAILED` if this auth method isn't supported; otherwise an
object containing queries for the user
:rtype: int or `.InteractiveQuery`
"""
return AUTH_FAILED
@ -249,31 +202,30 @@ class ServerInterface (object):
"""
Continue or finish an interactive authentication challenge, if
supported. You should override this method in server mode if you want
to support the C{"keyboard-interactive"} auth type.
to support the ``"keyboard-interactive"`` auth type.
Return L{AUTH_FAILED} if the responses are not accepted,
L{AUTH_SUCCESSFUL} if the responses are accepted and complete
the authentication, or L{AUTH_PARTIALLY_SUCCESSFUL} if your
Return `.AUTH_FAILED` if the responses are not accepted,
`.AUTH_SUCCESSFUL` if the responses are accepted and complete
the authentication, or `.AUTH_PARTIALLY_SUCCESSFUL` if your
authentication is stateful, and this set of responses is accepted for
authentication, but more authentication is required. (In this latter
case, L{get_allowed_auths} will be called to report to the client what
case, `get_allowed_auths` will be called to report to the client what
options it has for continuing the authentication.)
If you wish to continue interactive authentication with more questions,
you may return an L{InteractiveQuery} object, which should cause the
you may return an `.InteractiveQuery` object, which should cause the
client to respond with more answers, calling this method again. This
cycle can continue indefinitely.
The default implementation always returns L{AUTH_FAILED}.
The default implementation always returns `.AUTH_FAILED`.
@param responses: list of responses from the client
@type responses: list(str)
@return: L{AUTH_FAILED} if the authentication fails;
L{AUTH_SUCCESSFUL} if it succeeds;
L{AUTH_PARTIALLY_SUCCESSFUL} if the interactive auth is
successful, but authentication must continue; otherwise an object
containing queries for the user
@rtype: int or L{InteractiveQuery}
:param list responses: list of `str` responses from the client
:return:
`.AUTH_FAILED` if the authentication fails; `.AUTH_SUCCESSFUL` if
it succeeds; `.AUTH_PARTIALLY_SUCCESSFUL` if the interactive auth
is successful, but authentication must continue; otherwise an
object containing queries for the user
:rtype: int or `.InteractiveQuery`
"""
return AUTH_FAILED
@ -281,22 +233,20 @@ class ServerInterface (object):
"""
Handle a request for port forwarding. The client is asking that
connections to the given address and port be forwarded back across
this ssh connection. An address of C{"0.0.0.0"} indicates a global
address (any address associated with this server) and a port of C{0}
this ssh connection. An address of ``"0.0.0.0"`` indicates a global
address (any address associated with this server) and a port of ``0``
indicates that no specific port is requested (usually the OS will pick
a port).
The default implementation always returns C{False}, rejecting the
The default implementation always returns ``False``, rejecting the
port forwarding request. If the request is accepted, you should return
the port opened for listening.
@param address: the requested address
@type address: str
@param port: the requested port
@type port: int
@return: the port number that was opened for listening, or C{False} to
reject
@rtype: int
:param str address: the requested address
:param int port: the requested port
:return:
the port number (`int`) that was opened for listening, or ``False``
to reject
"""
return False
@ -306,19 +256,17 @@ class ServerInterface (object):
If the given address and port is being forwarded across this ssh
connection, the port should be closed.
@param address: the forwarded address
@type address: str
@param port: the forwarded port
@type port: int
:param str address: the forwarded address
:param int port: the forwarded port
"""
pass
def check_global_request(self, kind, msg):
"""
Handle a global request of the given C{kind}. This method is called
Handle a global request of the given ``kind``. This method is called
in server mode and client mode, whenever the remote host makes a global
request. If there are any arguments to the request, they will be in
C{msg}.
``msg``.
There aren't any useful global requests defined, aside from port
forwarding, so usually this type of request is an extension to the
@ -329,19 +277,17 @@ class ServerInterface (object):
sent back with the successful result. (Note that the items in the
tuple can only be strings, ints, longs, or bools.)
The default implementation always returns C{False}, indicating that it
The default implementation always returns ``False``, indicating that it
does not support any global requests.
@note: Port forwarding requests are handled separately, in
L{check_port_forward_request}.
.. note:: Port forwarding requests are handled separately, in
`check_port_forward_request`.
@param kind: the kind of global request being made.
@type kind: str
@param msg: any extra arguments to the request.
@type msg: L{Message}
@return: C{True} or a tuple of data if the request was granted;
C{False} otherwise.
@rtype: bool
:param str kind: the kind of global request being made.
:param .Message msg: any extra arguments to the request.
:return:
``True`` or a `tuple` of data if the request was granted; ``False``
otherwise.
"""
return False
@ -355,89 +301,78 @@ class ServerInterface (object):
Determine if a pseudo-terminal of the given dimensions (usually
requested for shell access) can be provided on the given channel.
The default implementation always returns C{False}.
The default implementation always returns ``False``.
@param channel: the L{Channel} the pty request arrived on.
@type channel: L{Channel}
@param term: type of terminal requested (for example, C{"vt100"}).
@type term: str
@param width: width of screen in characters.
@type width: int
@param height: height of screen in characters.
@type height: int
@param pixelwidth: width of screen in pixels, if known (may be C{0} if
unknown).
@type pixelwidth: int
@param pixelheight: height of screen in pixels, if known (may be C{0}
if unknown).
@type pixelheight: int
@return: C{True} if the psuedo-terminal has been allocated; C{False}
:param .Channel channel: the `.Channel` the pty request arrived on.
:param str term: type of terminal requested (for example, ``"vt100"``).
:param int width: width of screen in characters.
:param int height: height of screen in characters.
:param int pixelwidth:
width of screen in pixels, if known (may be ``0`` if unknown).
:param int pixelheight:
height of screen in pixels, if known (may be ``0`` if unknown).
:return:
``True`` if the psuedo-terminal has been allocated; ``False``
otherwise.
@rtype: bool
"""
return False
def check_channel_shell_request(self, channel):
"""
Determine if a shell will be provided to the client on the given
channel. If this method returns C{True}, the channel should be
channel. If this method returns ``True``, the channel should be
connected to the stdin/stdout of a shell (or something that acts like
a shell).
The default implementation always returns C{False}.
The default implementation always returns ``False``.
@param channel: the L{Channel} the request arrived on.
@type channel: L{Channel}
@return: C{True} if this channel is now hooked up to a shell; C{False}
if a shell can't or won't be provided.
@rtype: bool
:param .Channel channel: the `.Channel` the request arrived on.
:return:
``True`` if this channel is now hooked up to a shell; ``False`` if
a shell can't or won't be provided.
"""
return False
def check_channel_exec_request(self, channel, command):
"""
Determine if a shell command will be executed for the client. If this
method returns C{True}, the channel should be connected to the stdin,
method returns ``True``, the channel should be connected to the stdin,
stdout, and stderr of the shell command.
The default implementation always returns C{False}.
The default implementation always returns ``False``.
@param channel: the L{Channel} the request arrived on.
@type channel: L{Channel}
@param command: the command to execute.
@type command: str
@return: C{True} if this channel is now hooked up to the stdin,
stdout, and stderr of the executing command; C{False} if the
command will not be executed.
@rtype: bool
:param .Channel channel: the `.Channel` the request arrived on.
:param str command: the command to execute.
:return:
``True`` if this channel is now hooked up to the stdin, stdout, and
stderr of the executing command; ``False`` if the command will not
be executed.
@since: 1.1
.. versionadded:: 1.1
"""
return False
def check_channel_subsystem_request(self, channel, name):
"""
Determine if a requested subsystem will be provided to the client on
the given channel. If this method returns C{True}, all future I/O
the given channel. If this method returns ``True``, all future I/O
through this channel will be assumed to be connected to the requested
subsystem. An example of a subsystem is C{sftp}.
subsystem. An example of a subsystem is ``sftp``.
The default implementation checks for a subsystem handler assigned via
L{Transport.set_subsystem_handler}.
`.Transport.set_subsystem_handler`.
If one has been set, the handler is invoked and this method returns
C{True}. Otherwise it returns C{False}.
``True``. Otherwise it returns ``False``.
@note: Because the default implementation uses the L{Transport} to
.. note:: Because the default implementation uses the `.Transport` to
identify valid subsystems, you probably won't need to override this
method.
@param channel: the L{Channel} the pty request arrived on.
@type channel: L{Channel}
@param name: name of the requested subsystem.
@type name: str
@return: C{True} if this channel is now hooked up to the requested
subsystem; C{False} if that subsystem can't or won't be provided.
@rtype: bool
:param .Channel channel: the `.Channel` the pty request arrived on.
:param str name: name of the requested subsystem.
:return:
``True`` if this channel is now hooked up to the requested
subsystem; ``False`` if that subsystem can't or won't be provided.
"""
handler_class, larg, kwarg = channel.get_transport()._get_subsystem_handler(name)
if handler_class is None:
@ -451,102 +386,88 @@ class ServerInterface (object):
Determine if the pseudo-terminal on the given channel can be resized.
This only makes sense if a pty was previously allocated on it.
The default implementation always returns C{False}.
The default implementation always returns ``False``.
@param channel: the L{Channel} the pty request arrived on.
@type channel: L{Channel}
@param width: width of screen in characters.
@type width: int
@param height: height of screen in characters.
@type height: int
@param pixelwidth: width of screen in pixels, if known (may be C{0} if
unknown).
@type pixelwidth: int
@param pixelheight: height of screen in pixels, if known (may be C{0}
if unknown).
@type pixelheight: int
@return: C{True} if the terminal was resized; C{False} if not.
@rtype: bool
:param .Channel channel: the `.Channel` the pty request arrived on.
:param int width: width of screen in characters.
:param int height: height of screen in characters.
:param int pixelwidth:
width of screen in pixels, if known (may be ``0`` if unknown).
:param int pixelheight:
height of screen in pixels, if known (may be ``0`` if unknown).
:return: ``True`` if the terminal was resized; ``False`` if not.
"""
return False
def check_channel_x11_request(self, channel, single_connection, auth_protocol, auth_cookie, screen_number):
"""
Determine if the client will be provided with an X11 session. If this
method returns C{True}, X11 applications should be routed through new
SSH channels, using L{Transport.open_x11_channel}.
method returns ``True``, X11 applications should be routed through new
SSH channels, using `.Transport.open_x11_channel`.
The default implementation always returns C{False}.
The default implementation always returns ``False``.
@param channel: the L{Channel} the X11 request arrived on
@type channel: L{Channel}
@param single_connection: C{True} if only a single X11 channel should
be opened
@type single_connection: bool
@param auth_protocol: the protocol used for X11 authentication
@type auth_protocol: str
@param auth_cookie: the cookie used to authenticate to X11
@type auth_cookie: str
@param screen_number: the number of the X11 screen to connect to
@type screen_number: int
@return: C{True} if the X11 session was opened; C{False} if not
@rtype: bool
:param .Channel channel: the `.Channel` the X11 request arrived on
:param bool single_connection:
``True`` if only a single X11 channel should be opened, else
``False``.
:param str auth_protocol: the protocol used for X11 authentication
:param str auth_cookie: the cookie used to authenticate to X11
:param int screen_number: the number of the X11 screen to connect to
:return: ``True`` if the X11 session was opened; ``False`` if not
"""
return False
def check_channel_forward_agent_request(self, channel):
"""
Determine if the client will be provided with an forward agent session.
If this method returns C{True}, the server will allow SSH Agent
If this method returns ``True``, the server will allow SSH Agent
forwarding.
The default implementation always returns C{False}.
The default implementation always returns ``False``.
@param channel: the L{Channel} the request arrived on
@type channel: L{Channel}
@return: C{True} if the AgentForward was loaded; C{False} if not
@rtype: bool
:param .Channel channel: the `.Channel` the request arrived on
:return: ``True`` if the AgentForward was loaded; ``False`` if not
"""
return False
def check_channel_direct_tcpip_request(self, chanid, origin, destination):
"""
Determine if a local port forwarding channel will be granted, and
return C{OPEN_SUCCEEDED} or an error code. This method is
return ``OPEN_SUCCEEDED`` or an error code. This method is
called in server mode when the client requests a channel, after
authentication is complete.
The C{chanid} parameter is a small number that uniquely identifies the
channel within a L{Transport}. A L{Channel} object is not created
unless this method returns C{OPEN_SUCCEEDED} -- once a
L{Channel} object is created, you can call L{Channel.get_id} to
The ``chanid`` parameter is a small number that uniquely identifies the
channel within a `.Transport`. A `.Channel` object is not created
unless this method returns ``OPEN_SUCCEEDED`` -- once a
`.Channel` object is created, you can call `.Channel.get_id` to
retrieve the channel ID.
The origin and destination parameters are (ip_address, port) tuples
that correspond to both ends of the TCP connection in the forwarding
tunnel.
The return value should either be C{OPEN_SUCCEEDED} (or
C{0}) to allow the channel request, or one of the following error
The return value should either be ``OPEN_SUCCEEDED`` (or
``0``) to allow the channel request, or one of the following error
codes to reject it:
- C{OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED}
- C{OPEN_FAILED_CONNECT_FAILED}
- C{OPEN_FAILED_UNKNOWN_CHANNEL_TYPE}
- C{OPEN_FAILED_RESOURCE_SHORTAGE}
- ``OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED``
- ``OPEN_FAILED_CONNECT_FAILED``
- ``OPEN_FAILED_UNKNOWN_CHANNEL_TYPE``
- ``OPEN_FAILED_RESOURCE_SHORTAGE``
The default implementation always returns
C{OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED}.
``OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED``.
@param chanid: ID of the channel
@type chanid: int
@param origin: 2-tuple containing the IP address and port of the
originator (client side)
@type origin: tuple
@param destination: 2-tuple containing the IP address and port of the
destination (server side)
@type destination: tuple
@return: a success or failure code (listed above)
@rtype: int
:param int chanid: ID of the channel
:param tuple origin:
2-tuple containing the IP address and port of the originator
(client side)
:param tuple destination:
2-tuple containing the IP address and port of the destination
(server side)
:return: an `int` success or failure code (listed above)
"""
return OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED
@ -572,37 +493,71 @@ class ServerInterface (object):
return False
class InteractiveQuery (object):
"""
A query (set of prompts) for a user during interactive authentication.
"""
def __init__(self, name='', instructions='', *prompts):
"""
Create a new interactive query to send to the client. The name and
instructions are optional, but are generally displayed to the end
user. A list of prompts may be included, or they may be added via
the `add_prompt` method.
:param str name: name of this query
:param str instructions:
user instructions (usually short) about this query
:param str prompts: one or more authentication prompts
"""
self.name = name
self.instructions = instructions
self.prompts = []
for x in prompts:
if (type(x) is str) or (type(x) is unicode):
self.add_prompt(x)
else:
self.add_prompt(x[0], x[1])
def add_prompt(self, prompt, echo=True):
"""
Add a prompt to this query. The prompt should be a (reasonably short)
string. Multiple prompts can be added to the same query.
:param str prompt: the user prompt
:param bool echo:
``True`` (default) if the user's response should be echoed;
``False`` if not (for a password or similar)
"""
self.prompts.append((prompt, echo))
class SubsystemHandler (threading.Thread):
"""
Handler for a subsytem in server mode. If you create a subclass of this
class and pass it to
L{Transport.set_subsystem_handler},
an object of this
class and pass it to `.Transport.set_subsystem_handler`, an object of this
class will be created for each request for this subsystem. Each new object
will be executed within its own new thread by calling L{start_subsystem}.
will be executed within its own new thread by calling `start_subsystem`.
When that method completes, the channel is closed.
For example, if you made a subclass C{MP3Handler} and registered it as the
handler for subsystem C{"mp3"}, then whenever a client has successfully
authenticated and requests subsytem C{"mp3"}, an object of class
C{MP3Handler} will be created, and L{start_subsystem} will be called on
For example, if you made a subclass ``MP3Handler`` and registered it as the
handler for subsystem ``"mp3"``, then whenever a client has successfully
authenticated and requests subsytem ``"mp3"``, an object of class
``MP3Handler`` will be created, and `start_subsystem` will be called on
it from a new thread.
"""
def __init__(self, channel, name, server):
"""
Create a new handler for a channel. This is used by L{ServerInterface}
Create a new handler for a channel. This is used by `.ServerInterface`
to start up a new handler when a channel requests this subsystem. You
don't need to override this method, but if you do, be sure to pass the
C{channel} and C{name} parameters through to the original C{__init__}
``channel`` and ``name`` parameters through to the original ``__init__``
method here.
@param channel: the channel associated with this subsystem request.
@type channel: L{Channel}
@param name: name of the requested subsystem.
@type name: str
@param server: the server object for the session that started this
subsystem
@type server: L{ServerInterface}
:param .Channel channel: the channel associated with this subsystem request.
:param str name: name of the requested subsystem.
:param .ServerInterface server:
the server object for the session that started this subsystem
"""
threading.Thread.__init__(self, target=self._run)
self.__channel = channel
@ -612,10 +567,8 @@ class SubsystemHandler (threading.Thread):
def get_server(self):
"""
Return the L{ServerInterface} object associated with this channel and
Return the `.ServerInterface` object associated with this channel and
subsystem.
@rtype: L{ServerInterface}
"""
return self.__server
@ -640,22 +593,20 @@ class SubsystemHandler (threading.Thread):
subsystem is finished, this method will return. After this method
returns, the channel is closed.
The combination of C{transport} and C{channel} are unique; this handler
corresponds to exactly one L{Channel} on one L{Transport}.
The combination of ``transport`` and ``channel`` are unique; this handler
corresponds to exactly one `.Channel` on one `.Transport`.
@note: It is the responsibility of this method to exit if the
underlying L{Transport} is closed. This can be done by checking
L{Transport.is_active} or noticing an EOF
on the L{Channel}. If this method loops forever without checking
for this case, your python interpreter may refuse to exit because
this thread will still be running.
.. note::
It is the responsibility of this method to exit if the underlying
`.Transport` is closed. This can be done by checking
`.Transport.is_active` or noticing an EOF on the `.Channel`. If
this method loops forever without checking for this case, your
Python interpreter may refuse to exit because this thread will
still be running.
@param name: name of the requested subsystem.
@type name: str
@param transport: the server-mode L{Transport}.
@type transport: L{Transport}
@param channel: the channel associated with this subsystem request.
@type channel: L{Channel}
:param str name: name of the requested subsystem.
:param .Transport transport: the server-mode `.Transport`.
:param .Channel channel: the channel associated with this subsystem request.
"""
pass
@ -664,6 +615,6 @@ class SubsystemHandler (threading.Thread):
Perform any cleanup at the end of a subsystem. The default
implementation just closes the channel.
@since: 1.1
.. versionadded:: 1.1
"""
self.__channel.close()

34
paramiko/sftp_attr.py
View File

@ -26,18 +26,19 @@ class SFTPAttributes (object):
"""
Representation of the attributes of a file (or proxied file) for SFTP in
client or server mode. It attemps to mirror the object returned by
C{os.stat} as closely as possible, so it may have the following fields,
with the same meanings as those returned by an C{os.stat} object:
- st_size
- st_uid
- st_gid
- st_mode
- st_atime
- st_mtime
`os.stat` as closely as possible, so it may have the following fields,
with the same meanings as those returned by an `os.stat` object:
- ``st_size``
- ``st_uid``
- ``st_gid``
- ``st_mode``
- ``st_atime``
- ``st_mtime``
Because SFTP allows flags to have other arbitrary named attributes, these
are stored in a dict named C{attr}. Occasionally, the filename is also
stored, in C{filename}.
are stored in a dict named ``attr``. Occasionally, the filename is also
stored, in ``filename``.
"""
FLAG_SIZE = 1
@ -61,15 +62,12 @@ class SFTPAttributes (object):
def from_stat(cls, obj, filename=None):
"""
Create an SFTPAttributes object from an existing C{stat} object (an
object returned by C{os.stat}).
Create an `.SFTPAttributes` object from an existing ``stat`` object (an
object returned by `os.stat`).
@param obj: an object returned by C{os.stat} (or equivalent).
@type obj: object
@param filename: the filename associated with this file.
@type filename: str
@return: new L{SFTPAttributes} object with the same attribute fields.
@rtype: L{SFTPAttributes}
:param object obj: an object returned by `os.stat` (or equivalent).
:param str filename: the filename associated with this file.
:return: new `.SFTPAttributes` object with the same attribute fields.
"""
attr = cls()
attr.st_size = obj.st_size

417
paramiko/sftp_client.py
View File

@ -1,6 +1,6 @@
# Copyright (C) 2003-2007 Robey Pointer <robeypointer@gmail.com>
#
# This file is part of paramiko.
# This file is part of Paramiko.
#
# Paramiko is free software; you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
@ -16,9 +16,6 @@
# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
Client-mode SFTP support.
"""
from binascii import hexlify
import errno
@ -49,24 +46,24 @@ def _to_unicode(s):
return s
class SFTPClient (BaseSFTP):
class SFTPClient(BaseSFTP):
"""
SFTP client object. C{SFTPClient} is used to open an sftp session across
an open ssh L{Transport} and do remote file operations.
SFTP client object.
Used to open an SFTP session across an open SSH `.Transport` and perform
remote file operations.
"""
def __init__(self, sock):
"""
Create an SFTP client from an existing L{Channel}. The channel
should already have requested the C{"sftp"} subsystem.
Create an SFTP client from an existing `.Channel`. The channel
should already have requested the ``"sftp"`` subsystem.
An alternate way to create an SFTP client context is by using
L{from_transport}.
`from_transport`.
@param sock: an open L{Channel} using the C{"sftp"} subsystem
@type sock: L{Channel}
:param .Channel sock: an open `.Channel` using the ``"sftp"`` subsystem
@raise SSHException: if there's an exception while negotiating
:raises SSHException: if there's an exception while negotiating
sftp
"""
BaseSFTP.__init__(self)
@ -91,13 +88,12 @@ class SFTPClient (BaseSFTP):
def from_transport(cls, t):
"""
Create an SFTP client channel from an open L{Transport}.
Create an SFTP client channel from an open `.Transport`.
@param t: an open L{Transport} which is already authenticated
@type t: L{Transport}
@return: a new L{SFTPClient} object, referring to an sftp session
(channel) across the transport
@rtype: L{SFTPClient}
:param .Transport t: an open `.Transport` which is already authenticated
:return:
a new `.SFTPClient` object, referring to an sftp session (channel)
across the transport
"""
chan = t.open_session()
if chan is None:
@ -117,56 +113,49 @@ class SFTPClient (BaseSFTP):
"""
Close the SFTP session and its underlying channel.
@since: 1.4
.. versionadded:: 1.4
"""
self._log(INFO, 'sftp session closed.')
self.sock.close()
def get_channel(self):
"""
Return the underlying L{Channel} object for this SFTP session. This
Return the underlying `.Channel` object for this SFTP session. This
might be useful for doing things like setting a timeout on the channel.
@return: the SSH channel
@rtype: L{Channel}
@since: 1.7.1
.. versionadded:: 1.7.1
"""
return self.sock
def listdir(self, path='.'):
"""
Return a list containing the names of the entries in the given C{path}.
The list is in arbitrary order. It does not include the special
entries C{'.'} and C{'..'} even if they are present in the folder.
This method is meant to mirror C{os.listdir} as closely as possible.
For a list of full L{SFTPAttributes} objects, see L{listdir_attr}.
Return a list containing the names of the entries in the given ``path``.
@param path: path to list (defaults to C{'.'})
@type path: str
@return: list of filenames
@rtype: list of str
The list is in arbitrary order. It does not include the special
entries ``'.'`` and ``'..'`` even if they are present in the folder.
This method is meant to mirror ``os.listdir`` as closely as possible.
For a list of full `.SFTPAttributes` objects, see `listdir_attr`.
:param str path: path to list (defaults to ``'.'``)
"""
return [f.filename for f in self.listdir_attr(path)]
def listdir_attr(self, path='.'):
"""
Return a list containing L{SFTPAttributes} objects corresponding to
files in the given C{path}. The list is in arbitrary order. It does
not include the special entries C{'.'} and C{'..'} even if they are
Return a list containing `.SFTPAttributes` objects corresponding to
files in the given ``path``. The list is in arbitrary order. It does
not include the special entries ``'.'`` and ``'..'`` even if they are
present in the folder.
The returned L{SFTPAttributes} objects will each have an additional
field: C{longname}, which may contain a formatted string of the file's
The returned `.SFTPAttributes` objects will each have an additional
field: ``longname``, which may contain a formatted string of the file's
attributes, in unix format. The content of this string will probably
depend on the SFTP server implementation.
@param path: path to list (defaults to C{'.'})
@type path: str
@return: list of attributes
@rtype: list of L{SFTPAttributes}
:param str path: path to list (defaults to ``'.'``)
:return: list of `.SFTPAttributes` objects
@since: 1.2
.. versionadded:: 1.2
"""
path = self._adjust_cwd(path)
self._log(DEBUG, 'listdir(%r)' % path)
@ -196,37 +185,34 @@ class SFTPClient (BaseSFTP):
def open(self, filename, mode='r', bufsize=-1):
"""
Open a file on the remote server. The arguments are the same as for
python's built-in C{file} (aka C{open}). A file-like object is
returned, which closely mimics the behavior of a normal python file
object, including the ability to be used as a context manager.
Python's built-in `python:file` (aka `python:open`). A file-like
object is returned, which closely mimics the behavior of a normal
Python file object, including the ability to be used as a context
manager.
The mode indicates how the file is to be opened: C{'r'} for reading,
C{'w'} for writing (truncating an existing file), C{'a'} for appending,
C{'r+'} for reading/writing, C{'w+'} for reading/writing (truncating an
existing file), C{'a+'} for reading/appending. The python C{'b'} flag
is ignored, since SSH treats all files as binary. The C{'U'} flag is
supported in a compatible way.
The mode indicates how the file is to be opened: ``'r'`` for reading,
``'w'`` for writing (truncating an existing file), ``'a'`` for
appending, ``'r+'`` for reading/writing, ``'w+'`` for reading/writing
(truncating an existing file), ``'a+'`` for reading/appending. The
Python ``'b'`` flag is ignored, since SSH treats all files as binary.
The ``'U'`` flag is supported in a compatible way.
Since 1.5.2, an C{'x'} flag indicates that the operation should only
Since 1.5.2, an ``'x'`` flag indicates that the operation should only
succeed if the file was created and did not previously exist. This has
no direct mapping to python's file flags, but is commonly known as the
C{O_EXCL} flag in posix.
no direct mapping to Python's file flags, but is commonly known as the
``O_EXCL`` flag in posix.
The file will be buffered in standard python style by default, but
can be altered with the C{bufsize} parameter. C{0} turns off
buffering, C{1} uses line buffering, and any number greater than 1
(C{>1}) uses that specific buffer size.
The file will be buffered in standard Python style by default, but
can be altered with the ``bufsize`` parameter. ``0`` turns off
buffering, ``1`` uses line buffering, and any number greater than 1
(``>1``) uses that specific buffer size.
@param filename: name of the file to open
@type filename: str
@param mode: mode (python-style) to open in
@type mode: str
@param bufsize: desired buffering (-1 = default buffer size)
@type bufsize: int
@return: a file object representing the open file
@rtype: SFTPFile
:param str filename: name of the file to open
:param str mode: mode (Python-style) to open in
:param int bufsize: desired buffering (-1 = default buffer size)
:return: an `.SFTPFile` object representing the open file
@raise IOError: if the file could not be opened.
:raises IOError: if the file could not be opened.
"""
filename = self._adjust_cwd(filename)
self._log(DEBUG, 'open(%r, %r)' % (filename, mode))
@ -249,18 +235,17 @@ class SFTPClient (BaseSFTP):
self._log(DEBUG, 'open(%r, %r) -> %s' % (filename, mode, hexlify(handle)))
return SFTPFile(self, handle, mode, bufsize)
# python continues to vacillate about "open" vs "file"...
# Python continues to vacillate about "open" vs "file"...
file = open
def remove(self, path):
"""
Remove the file at the given path. This only works on files; for
removing folders (directories), use L{rmdir}.
removing folders (directories), use `rmdir`.
@param path: path (absolute or relative) of the file to remove
@type path: str
:param str path: path (absolute or relative) of the file to remove
@raise IOError: if the path refers to a folder (directory)
:raises IOError: if the path refers to a folder (directory)
"""
path = self._adjust_cwd(path)
self._log(DEBUG, 'remove(%r)' % path)
@ -270,14 +255,12 @@ class SFTPClient (BaseSFTP):
def rename(self, oldpath, newpath):
"""
Rename a file or folder from C{oldpath} to C{newpath}.
Rename a file or folder from ``oldpath`` to ``newpath``.
@param oldpath: existing name of the file or folder
@type oldpath: str
@param newpath: new name for the file or folder
@type newpath: str
:param str oldpath: existing name of the file or folder
:param str newpath: new name for the file or folder
@raise IOError: if C{newpath} is a folder, or something else goes
:raises IOError: if ``newpath`` is a folder, or something else goes
wrong
"""
oldpath = self._adjust_cwd(oldpath)
@ -287,14 +270,12 @@ class SFTPClient (BaseSFTP):
def mkdir(self, path, mode=0777):
"""
Create a folder (directory) named C{path} with numeric mode C{mode}.
Create a folder (directory) named ``path`` with numeric mode ``mode``.
The default mode is 0777 (octal). On some systems, mode is ignored.
Where it is used, the current umask value is first masked out.
@param path: name of the folder to create
@type path: str
@param mode: permissions (posix-style) for the newly-created folder
@type mode: int
:param str path: name of the folder to create
:param int mode: permissions (posix-style) for the newly-created folder
"""
path = self._adjust_cwd(path)
self._log(DEBUG, 'mkdir(%r, %r)' % (path, mode))
@ -304,10 +285,9 @@ class SFTPClient (BaseSFTP):
def rmdir(self, path):
"""
Remove the folder named C{path}.
Remove the folder named ``path``.
@param path: name of the folder to remove
@type path: str
:param str path: name of the folder to remove
"""
path = self._adjust_cwd(path)
self._log(DEBUG, 'rmdir(%r)' % path)
@ -317,20 +297,20 @@ class SFTPClient (BaseSFTP):
"""
Retrieve information about a file on the remote system. The return
value is an object whose attributes correspond to the attributes of
python's C{stat} structure as returned by C{os.stat}, except that it
Python's ``stat`` structure as returned by ``os.stat``, except that it
contains fewer fields. An SFTP server may return as much or as little
info as it wants, so the results may vary from server to server.
Unlike a python C{stat} object, the result may not be accessed as a
tuple. This is mostly due to the author's slack factor.
Unlike a Python `python:stat` object, the result may not be accessed as
a tuple. This is mostly due to the author's slack factor.
The fields supported are: C{st_mode}, C{st_size}, C{st_uid}, C{st_gid},
C{st_atime}, and C{st_mtime}.
The fields supported are: ``st_mode``, ``st_size``, ``st_uid``,
``st_gid``, ``st_atime``, and ``st_mtime``.
@param path: the filename to stat
@type path: str
@return: an object containing attributes about the given file
@rtype: SFTPAttributes
:param str path: the filename to stat
:return:
an `.SFTPAttributes` object containing attributes about the given
file
"""
path = self._adjust_cwd(path)
self._log(DEBUG, 'stat(%r)' % path)
@ -343,12 +323,12 @@ class SFTPClient (BaseSFTP):
"""
Retrieve information about a file on the remote system, without
following symbolic links (shortcuts). This otherwise behaves exactly
the same as L{stat}.
the same as `stat`.
@param path: the filename to stat
@type path: str
@return: an object containing attributes about the given file
@rtype: SFTPAttributes
:param str path: the filename to stat
:return:
an `.SFTPAttributes` object containing attributes about the given
file
"""
path = self._adjust_cwd(path)
self._log(DEBUG, 'lstat(%r)' % path)
@ -359,13 +339,11 @@ class SFTPClient (BaseSFTP):
def symlink(self, source, dest):
"""
Create a symbolic link (shortcut) of the C{source} path at
C{destination}.
Create a symbolic link (shortcut) of the ``source`` path at
``destination``.
@param source: path of the original file
@type source: str
@param dest: path of the newly created symlink
@type dest: str
:param str source: path of the original file
:param str dest: path of the newly created symlink
"""
dest = self._adjust_cwd(dest)
self._log(DEBUG, 'symlink(%r, %r)' % (source, dest))
@ -376,13 +354,11 @@ class SFTPClient (BaseSFTP):
def chmod(self, path, mode):
"""
Change the mode (permissions) of a file. The permissions are
unix-style and identical to those used by python's C{os.chmod}
unix-style and identical to those used by Python's `os.chmod`
function.
@param path: path of the file to change the permissions of
@type path: str
@param mode: new permissions
@type mode: int
:param str path: path of the file to change the permissions of
:param int mode: new permissions
"""
path = self._adjust_cwd(path)
self._log(DEBUG, 'chmod(%r, %r)' % (path, mode))
@ -392,17 +368,14 @@ class SFTPClient (BaseSFTP):
def chown(self, path, uid, gid):
"""
Change the owner (C{uid}) and group (C{gid}) of a file. As with
python's C{os.chown} function, you must pass both arguments, so if you
only want to change one, use L{stat} first to retrieve the current
Change the owner (``uid``) and group (``gid``) of a file. As with
Python's `os.chown` function, you must pass both arguments, so if you
only want to change one, use `stat` first to retrieve the current
owner and group.
@param path: path of the file to change the owner and group of
@type path: str
@param uid: new owner's uid
@type uid: int
@param gid: new group id
@type gid: int
:param str path: path of the file to change the owner and group of
:param int uid: new owner's uid
:param int gid: new group id
"""
path = self._adjust_cwd(path)
self._log(DEBUG, 'chown(%r, %r, %r)' % (path, uid, gid))
@ -412,18 +385,17 @@ class SFTPClient (BaseSFTP):
def utime(self, path, times):
"""
Set the access and modified times of the file specified by C{path}. If
C{times} is C{None}, then the file's access and modified times are set
to the current time. Otherwise, C{times} must be a 2-tuple of numbers,
of the form C{(atime, mtime)}, which is used to set the access and
modified times, respectively. This bizarre API is mimicked from python
Set the access and modified times of the file specified by ``path``. If
``times`` is ``None``, then the file's access and modified times are set
to the current time. Otherwise, ``times`` must be a 2-tuple of numbers,
of the form ``(atime, mtime)``, which is used to set the access and
modified times, respectively. This bizarre API is mimicked from Python
for the sake of consistency -- I apologize.
@param path: path of the file to modify
@type path: str
@param times: C{None} or a tuple of (access time, modified time) in
standard internet epoch time (seconds since 01 January 1970 GMT)
@type times: tuple(int)
:param str path: path of the file to modify
:param tuple times:
``None`` or a tuple of (access time, modified time) in standard
internet epoch time (seconds since 01 January 1970 GMT)
"""
path = self._adjust_cwd(path)
if times is None:
@ -435,14 +407,13 @@ class SFTPClient (BaseSFTP):
def truncate(self, path, size):
"""
Change the size of the file specified by C{path}. This usually extends
or shrinks the size of the file, just like the C{truncate()} method on
python file objects.
Change the size of the file specified by ``path``. This usually
extends or shrinks the size of the file, just like the `~file.truncate`
method on Python file objects.
@param path: path of the file to modify
@type path: str
@param size: the new size of the file
@type size: int or long
:param str path: path of the file to modify
:param size: the new size of the file
:type size: int or long
"""
path = self._adjust_cwd(path)
self._log(DEBUG, 'truncate(%r, %r)' % (path, size))
@ -453,13 +424,11 @@ class SFTPClient (BaseSFTP):
def readlink(self, path):
"""
Return the target of a symbolic link (shortcut). You can use
L{symlink} to create these. The result may be either an absolute or
`symlink` to create these. The result may be either an absolute or
relative pathname.
@param path: path of the symbolic link file
@type path: str
@return: target path
@rtype: str
:param str path: path of the symbolic link file
:return: target path, as a `str`
"""
path = self._adjust_cwd(path)
self._log(DEBUG, 'readlink(%r)' % path)
@ -477,15 +446,13 @@ class SFTPClient (BaseSFTP):
"""
Return the normalized path (on the server) of a given path. This
can be used to quickly resolve symbolic links or determine what the
server is considering to be the "current folder" (by passing C{'.'}
as C{path}).
server is considering to be the "current folder" (by passing ``'.'``
as ``path``).
@param path: path to be normalized
@type path: str
@return: normalized form of the given path
@rtype: str
:param str path: path to be normalized
:return: normalized form of the given path (as a `str`)
@raise IOError: if the path can't be resolved on the server
:raises IOError: if the path can't be resolved on the server
"""
path = self._adjust_cwd(path)
self._log(DEBUG, 'normalize(%r)' % path)
@ -500,18 +467,17 @@ class SFTPClient (BaseSFTP):
def chdir(self, path):
"""
Change the "current directory" of this SFTP session. Since SFTP
doesn't really have the concept of a current working directory, this
is emulated by paramiko. Once you use this method to set a working
directory, all operations on this SFTPClient object will be relative
to that path. You can pass in C{None} to stop using a current working
doesn't really have the concept of a current working directory, this is
emulated by Paramiko. Once you use this method to set a working
directory, all operations on this `.SFTPClient` object will be relative
to that path. You can pass in ``None`` to stop using a current working
directory.
@param path: new current working directory
@type path: str
:param str path: new current working directory
@raise IOError: if the requested path doesn't exist on the server
:raises IOError: if the requested path doesn't exist on the server
@since: 1.4
.. versionadded:: 1.4
"""
if path is None:
self._cwd = None
@ -523,43 +489,41 @@ class SFTPClient (BaseSFTP):
def getcwd(self):
"""
Return the "current working directory" for this SFTP session, as
emulated by paramiko. If no directory has been set with L{chdir},
this method will return C{None}.
emulated by Paramiko. If no directory has been set with `chdir`,
this method will return ``None``.
@return: the current working directory on the server, or C{None}
@rtype: str
@since: 1.4
.. versionadded:: 1.4
"""
return self._cwd
def putfo(self, fl, remotepath, file_size=0, callback=None, confirm=True):
"""
Copy the contents of an open file object (C{fl}) to the SFTP server as
C{remotepath}. Any exception raised by operations will be passed through.
Copy the contents of an open file object (``fl``) to the SFTP server as
``remotepath``. Any exception raised by operations will be passed
through.
The SFTP operations use pipelining for speed.
@param fl: opened file or file-like object to copy
@type localpath: object
@param remotepath: the destination path on the SFTP server
@type remotepath: str
@param file_size: optional size parameter passed to callback. If none is
specified, size defaults to 0
@type file_size: int
@param callback: optional callback function that accepts the bytes
transferred so far and the total bytes to be transferred
:param file fl: opened file or file-like object to copy
:param str remotepath: the destination path on the SFTP server
:param int file_size:
optional size parameter passed to callback. If none is specified,
size defaults to 0
:param callable callback:
optional callback function (form: ``func(int, int)``) that accepts
the bytes transferred so far and the total bytes to be transferred
(since 1.7.4)
@type callback: function(int, int)
@param confirm: whether to do a stat() on the file afterwards to
confirm the file size (since 1.7.7)
@type confirm: bool
:param bool confirm:
whether to do a stat() on the file afterwards to confirm the file
size (since 1.7.7)
@return: an object containing attributes about the given file
(since 1.7.4)
@rtype: SFTPAttributes
:return:
an `.SFTPAttributes` object containing attributes about the given
file.
@since: 1.4
.. versionadded:: 1.4
.. versionchanged:: 1.7.4
Began returning rich attribute objects.
"""
fr = self.file(remotepath, 'wb')
fr.set_pipelined(True)
@ -585,29 +549,28 @@ class SFTPClient (BaseSFTP):
def put(self, localpath, remotepath, callback=None, confirm=True):
"""
Copy a local file (C{localpath}) to the SFTP server as C{remotepath}.
Copy a local file (``localpath``) to the SFTP server as ``remotepath``.
Any exception raised by operations will be passed through. This
method is primarily provided as a convenience.
The SFTP operations use pipelining for speed.
@param localpath: the local file to copy
@type localpath: str
@param remotepath: the destination path on the SFTP server
@type remotepath: str
@param callback: optional callback function that accepts the bytes
transferred so far and the total bytes to be transferred
(since 1.7.4)
@type callback: function(int, int)
@param confirm: whether to do a stat() on the file afterwards to
confirm the file size (since 1.7.7)
@type confirm: bool
:param str localpath: the local file to copy
:param str remotepath: the destination path on the SFTP server
:param callable callback:
optional callback function (form: ``func(int, int)``) that accepts
the bytes transferred so far and the total bytes to be transferred
:param bool confirm:
whether to do a stat() on the file afterwards to confirm the file
size
@return: an object containing attributes about the given file
(since 1.7.4)
@rtype: SFTPAttributes
:return: an `.SFTPAttributes` object containing attributes about the given file
@since: 1.4
.. versionadded:: 1.4
.. versionchanged:: 1.7.4
``callback`` and rich attribute return value added.
.. versionchanged:: 1.7.7
``confirm`` param added.
"""
file_size = os.stat(localpath).st_size
fl = file(localpath, 'rb')
@ -618,23 +581,22 @@ class SFTPClient (BaseSFTP):
def getfo(self, remotepath, fl, callback=None):
"""
Copy a remote file (C{remotepath}) from the SFTP server and write to
an open file or file-like object, C{fl}. Any exception raised by
Copy a remote file (``remotepath``) from the SFTP server and write to
an open file or file-like object, ``fl``. Any exception raised by
operations will be passed through. This method is primarily provided
as a convenience.
@param remotepath: opened file or file-like object to copy to
@type remotepath: object
@param fl: the destination path on the local host or open file
object
@type localpath: str
@param callback: optional callback function that accepts the bytes
transferred so far and the total bytes to be transferred
(since 1.7.4)
@type callback: function(int, int)
@return: the number of bytes written to the opened file object
:param object remotepath: opened file or file-like object to copy to
:param str fl:
the destination path on the local host or open file object
:param callable callback:
optional callback function (form: ``func(int, int)``) that accepts
the bytes transferred so far and the total bytes to be transferred
:return: the `number <int>` of bytes written to the opened file object
@since: 1.4
.. versionadded:: 1.4
.. versionchanged:: 1.7.4
Added the ``callable`` param.
"""
fr = self.file(remotepath, 'rb')
file_size = self.stat(remotepath).st_size
@ -655,20 +617,19 @@ class SFTPClient (BaseSFTP):
def get(self, remotepath, localpath, callback=None):
"""
Copy a remote file (C{remotepath}) from the SFTP server to the local
host as C{localpath}. Any exception raised by operations will be
Copy a remote file (``remotepath``) from the SFTP server to the local
host as ``localpath``. Any exception raised by operations will be
passed through. This method is primarily provided as a convenience.
@param remotepath: the remote file to copy
@type remotepath: str
@param localpath: the destination path on the local host
@type localpath: str
@param callback: optional callback function that accepts the bytes
transferred so far and the total bytes to be transferred
(since 1.7.4)
@type callback: function(int, int)
:param str remotepath: the remote file to copy
:param str localpath: the destination path on the local host
:param callable callback:
optional callback function (form: ``func(int, int)``) that accepts
the bytes transferred so far and the total bytes to be transferred
@since: 1.4
.. versionadded:: 1.4
.. versionchanged:: 1.7.4
Added the ``callback`` param
"""
file_size = self.stat(remotepath).st_size
fl = file(localpath, 'wb')
@ -782,6 +743,8 @@ class SFTPClient (BaseSFTP):
return self._cwd + '/' + path
class SFTP (SFTPClient):
"an alias for L{SFTPClient} for backwards compatability"
class SFTP(SFTPClient):
"""
An alias for `.SFTPClient` for backwards compatability.
"""
pass

175
paramiko/sftp_file.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
L{SFTPFile}
SFTP file object
"""
from __future__ import with_statement
@ -64,6 +64,9 @@ class SFTPFile (BufferedFile):
self._close(async=True)
def close(self):
"""
Close the file.
"""
self._close(async=False)
def _close(self, async=False):
@ -181,34 +184,34 @@ class SFTPFile (BufferedFile):
def settimeout(self, timeout):
"""
Set a timeout on read/write operations on the underlying socket or
ssh L{Channel}.
ssh `.Channel`.
@see: L{Channel.settimeout}
@param timeout: seconds to wait for a pending read/write operation
before raising C{socket.timeout}, or C{None} for no timeout
@type timeout: float
:param float timeout:
seconds to wait for a pending read/write operation before raising
``socket.timeout``, or ``None`` for no timeout
.. seealso:: `.Channel.settimeout`
"""
self.sftp.sock.settimeout(timeout)
def gettimeout(self):
"""
Returns the timeout in seconds (as a float) associated with the socket
or ssh L{Channel} used for this file.
Returns the timeout in seconds (as a `float`) associated with the
socket or ssh `.Channel` used for this file.
@see: L{Channel.gettimeout}
@rtype: float
.. seealso:: `.Channel.gettimeout`
"""
return self.sftp.sock.gettimeout()
def setblocking(self, blocking):
"""
Set blocking or non-blocking mode on the underiying socket or ssh
L{Channel}.
`.Channel`.
@see: L{Channel.setblocking}
@param blocking: 0 to set non-blocking mode; non-0 to set blocking
mode.
@type blocking: int
:param int blocking:
0 to set non-blocking mode; non-0 to set blocking mode.
.. seealso:: `.Channel.setblocking`
"""
self.sftp.sock.setblocking(blocking)
@ -226,11 +229,10 @@ class SFTPFile (BufferedFile):
def stat(self):
"""
Retrieve information about this file from the remote system. This is
exactly like L{SFTP.stat}, except that it operates on an already-open
file.
exactly like `.SFTPClient.stat`, except that it operates on an
already-open file.
@return: an object containing attributes about this file.
@rtype: SFTPAttributes
:return: an `.SFTPAttributes` object containing attributes about this file.
"""
t, msg = self.sftp._request(CMD_FSTAT, self.handle)
if t != CMD_ATTRS:
@ -240,11 +242,10 @@ class SFTPFile (BufferedFile):
def chmod(self, mode):
"""
Change the mode (permissions) of this file. The permissions are
unix-style and identical to those used by python's C{os.chmod}
unix-style and identical to those used by Python's `os.chmod`
function.
@param mode: new permissions
@type mode: int
:param int mode: new permissions
"""
self.sftp._log(DEBUG, 'chmod(%s, %r)' % (hexlify(self.handle), mode))
attr = SFTPAttributes()
@ -253,15 +254,13 @@ class SFTPFile (BufferedFile):
def chown(self, uid, gid):
"""
Change the owner (C{uid}) and group (C{gid}) of this file. As with
python's C{os.chown} function, you must pass both arguments, so if you
only want to change one, use L{stat} first to retrieve the current
Change the owner (``uid``) and group (``gid``) of this file. As with
Python's `os.chown` function, you must pass both arguments, so if you
only want to change one, use `stat` first to retrieve the current
owner and group.
@param uid: new owner's uid
@type uid: int
@param gid: new group id
@type gid: int
:param int uid: new owner's uid
:param int gid: new group id
"""
self.sftp._log(DEBUG, 'chown(%s, %r, %r)' % (hexlify(self.handle), uid, gid))
attr = SFTPAttributes()
@ -271,15 +270,15 @@ class SFTPFile (BufferedFile):
def utime(self, times):
"""
Set the access and modified times of this file. If
C{times} is C{None}, then the file's access and modified times are set
to the current time. Otherwise, C{times} must be a 2-tuple of numbers,
of the form C{(atime, mtime)}, which is used to set the access and
modified times, respectively. This bizarre API is mimicked from python
``times`` is ``None``, then the file's access and modified times are set
to the current time. Otherwise, ``times`` must be a 2-tuple of numbers,
of the form ``(atime, mtime)``, which is used to set the access and
modified times, respectively. This bizarre API is mimicked from Python
for the sake of consistency -- I apologize.
@param times: C{None} or a tuple of (access time, modified time) in
standard internet epoch time (seconds since 01 January 1970 GMT)
@type times: tuple(int)
:param tuple times:
``None`` or a tuple of (access time, modified time) in standard
internet epoch time (seconds since 01 January 1970 GMT)
"""
if times is None:
times = (time.time(), time.time())
@ -291,11 +290,11 @@ class SFTPFile (BufferedFile):
def truncate(self, size):
"""
Change the size of this file. This usually extends
or shrinks the size of the file, just like the C{truncate()} method on
python file objects.
or shrinks the size of the file, just like the ``truncate()`` method on
Python file objects.
@param size: the new size of the file
@type size: int or long
:param size: the new size of the file
:type size: int or long
"""
self.sftp._log(DEBUG, 'truncate(%s, %r)' % (hexlify(self.handle), size))
attr = SFTPAttributes()
@ -308,46 +307,48 @@ class SFTPFile (BufferedFile):
to verify a successful upload or download, or for various rsync-like
operations.
The file is hashed from C{offset}, for C{length} bytes. If C{length}
is 0, the remainder of the file is hashed. Thus, if both C{offset}
and C{length} are zero, the entire file is hashed.
The file is hashed from ``offset``, for ``length`` bytes. If ``length``
is 0, the remainder of the file is hashed. Thus, if both ``offset``
and ``length`` are zero, the entire file is hashed.
Normally, C{block_size} will be 0 (the default), and this method will
Normally, ``block_size`` will be 0 (the default), and this method will
return a byte string representing the requested hash (for example, a
string of length 16 for MD5, or 20 for SHA-1). If a non-zero
C{block_size} is given, each chunk of the file (from C{offset} to
C{offset + length}) of C{block_size} bytes is computed as a separate
``block_size`` is given, each chunk of the file (from ``offset`` to
``offset + length``) of ``block_size`` bytes is computed as a separate
hash. The hash results are all concatenated and returned as a single
string.
For example, C{check('sha1', 0, 1024, 512)} will return a string of
For example, ``check('sha1', 0, 1024, 512)`` will return a string of
length 40. The first 20 bytes will be the SHA-1 of the first 512 bytes
of the file, and the last 20 bytes will be the SHA-1 of the next 512
bytes.
@param hash_algorithm: the name of the hash algorithm to use (normally
C{"sha1"} or C{"md5"})
@type hash_algorithm: str
@param offset: offset into the file to begin hashing (0 means to start
from the beginning)
@type offset: int or long
@param length: number of bytes to hash (0 means continue to the end of
the file)
@type length: int or long
@param block_size: number of bytes to hash per result (must not be less
than 256; 0 means to compute only one hash of the entire segment)
@type block_size: int
@return: string of bytes representing the hash of each block,
concatenated together
@rtype: str
:param str hash_algorithm:
the name of the hash algorithm to use (normally ``"sha1"`` or
``"md5"``)
:param offset:
offset into the file to begin hashing (0 means to start from the
beginning)
:type offset: int or long
:param length:
number of bytes to hash (0 means continue to the end of the file)
:type length: int or long
:param int block_size:
number of bytes to hash per result (must not be less than 256; 0
means to compute only one hash of the entire segment)
:type block_size: int
:return:
`str` of bytes representing the hash of each block, concatenated
together
@note: Many (most?) servers don't support this extension yet.
@raise IOError: if the server doesn't support the "check-file"
:raises IOError: if the server doesn't support the "check-file"
extension, or possibly doesn't support the hash algorithm
requested
@since: 1.4
.. note:: Many (most?) servers don't support this extension yet.
.. versionadded:: 1.4
"""
t, msg = self.sftp._request(CMD_EXTENDED, 'check-file', self.handle,
hash_algorithm, long(offset), long(length), block_size)
@ -360,35 +361,35 @@ class SFTPFile (BufferedFile):
"""
Turn on/off the pipelining of write operations to this file. When
pipelining is on, paramiko won't wait for the server response after
each write operation. Instead, they're collected as they come in.
At the first non-write operation (including L{close}), all remaining
each write operation. Instead, they're collected as they come in. At
the first non-write operation (including `.close`), all remaining
server responses are collected. This means that if there was an error
with one of your later writes, an exception might be thrown from
within L{close} instead of L{write}.
with one of your later writes, an exception might be thrown from within
`.close` instead of `.write`.
By default, files are I{not} pipelined.
By default, files are not pipelined.
@param pipelined: C{True} if pipelining should be turned on for this
file; C{False} otherwise
@type pipelined: bool
:param bool pipelined:
``True`` if pipelining should be turned on for this file; ``False``
otherwise
@since: 1.5
.. versionadded:: 1.5
"""
self.pipelined = pipelined
def prefetch(self):
"""
Pre-fetch the remaining contents of this file in anticipation of
future L{read} calls. If reading the entire file, pre-fetching can
Pre-fetch the remaining contents of this file in anticipation of future
`.read` calls. If reading the entire file, pre-fetching can
dramatically improve the download speed by avoiding roundtrip latency.
The file's contents are incrementally buffered in a background thread.
The prefetched data is stored in a buffer until read via the L{read}
The prefetched data is stored in a buffer until read via the `.read`
method. Once data has been read, it's removed from the buffer. The
data may be read in a random order (using L{seek}); chunks of the
data may be read in a random order (using `.seek`); chunks of the
buffer that haven't been read will continue to be buffered.
@since: 1.5.1
.. versionadded:: 1.5.1
"""
size = self.stat().st_size
# queue up async reads for the rest of the file
@ -404,17 +405,17 @@ class SFTPFile (BufferedFile):
def readv(self, chunks):
"""
Read a set of blocks from the file by (offset, length). This is more
efficient than doing a series of L{seek} and L{read} calls, since the
efficient than doing a series of `.seek` and `.read` calls, since the
prefetch machinery is used to retrieve all the requested blocks at
once.
@param chunks: a list of (offset, length) tuples indicating which
sections of the file to read
@type chunks: list(tuple(long, int))
@return: a list of blocks read, in the same order as in C{chunks}
@rtype: list(str)
:param chunks:
a list of (offset, length) tuples indicating which sections of the
file to read
:type chunks: list(tuple(long, int))
:return: a list of blocks read, in the same order as in ``chunks``
@since: 1.5.4
.. versionadded:: 1.5.4
"""
self.sftp._log(DEBUG, 'readv(%s, %r)' % (hexlify(self.handle), chunks))

81
paramiko/sftp_handle.py
View File

@ -33,16 +33,15 @@ class SFTPHandle (object):
by the client to refer to the underlying file.
Server implementations can (and should) subclass SFTPHandle to implement
features of a file handle, like L{stat} or L{chattr}.
features of a file handle, like `stat` or `chattr`.
"""
def __init__(self, flags=0):
"""
Create a new file handle representing a local file being served over
SFTP. If C{flags} is passed in, it's used to determine if the file
SFTP. If ``flags`` is passed in, it's used to determine if the file
is open in append mode.
@param flags: optional flags as passed to L{SFTPServerInterface.open}
@type flags: int
:param int flags: optional flags as passed to `.SFTPServerInterface.open`
"""
self.__flags = flags
self.__name = None
@ -56,10 +55,10 @@ class SFTPHandle (object):
Normally you would use this method to close the underlying OS level
file object(s).
The default implementation checks for attributes on C{self} named
C{readfile} and/or C{writefile}, and if either or both are present,
their C{close()} methods are called. This means that if you are
using the default implementations of L{read} and L{write}, this
The default implementation checks for attributes on ``self`` named
``readfile`` and/or ``writefile``, and if either or both are present,
their ``close()`` methods are called. This means that if you are
using the default implementations of `read` and `write`, this
method's default implementation should be fine also.
"""
readfile = getattr(self, 'readfile', None)
@ -71,24 +70,22 @@ class SFTPHandle (object):
def read(self, offset, length):
"""
Read up to C{length} bytes from this file, starting at position
C{offset}. The offset may be a python long, since SFTP allows it
Read up to ``length`` bytes from this file, starting at position
``offset``. The offset may be a Python long, since SFTP allows it
to be 64 bits.
If the end of the file has been reached, this method may return an
empty string to signify EOF, or it may also return L{SFTP_EOF}.
empty string to signify EOF, or it may also return `.SFTP_EOF`.
The default implementation checks for an attribute on C{self} named
C{readfile}, and if present, performs the read operation on the python
The default implementation checks for an attribute on ``self`` named
``readfile``, and if present, performs the read operation on the Python
file-like object found there. (This is meant as a time saver for the
common case where you are wrapping a python file object.)
common case where you are wrapping a Python file object.)
@param offset: position in the file to start reading from.
@type offset: int or long
@param length: number of bytes to attempt to read.
@type length: int
@return: data read from the file, or an SFTP error code.
@rtype: str
:param offset: position in the file to start reading from.
:type offset: int or long
:param int length: number of bytes to attempt to read.
:return: data read from the file, or an SFTP error code, as a `str`.
"""
readfile = getattr(self, 'readfile', None)
if readfile is None:
@ -108,23 +105,22 @@ class SFTPHandle (object):
def write(self, offset, data):
"""
Write C{data} into this file at position C{offset}. Extending the
file past its original end is expected. Unlike python's normal
C{write()} methods, this method cannot do a partial write: it must
write all of C{data} or else return an error.
Write ``data`` into this file at position ``offset``. Extending the
file past its original end is expected. Unlike Python's normal
``write()`` methods, this method cannot do a partial write: it must
write all of ``data`` or else return an error.
The default implementation checks for an attribute on C{self} named
C{writefile}, and if present, performs the write operation on the
python file-like object found there. The attribute is named
differently from C{readfile} to make it easy to implement read-only
The default implementation checks for an attribute on ``self`` named
``writefile``, and if present, performs the write operation on the
Python file-like object found there. The attribute is named
differently from ``readfile`` to make it easy to implement read-only
(or write-only) files, but if both attributes are present, they should
refer to the same file.
@param offset: position in the file to start reading from.
@type offset: int or long
@param data: data to write into the file.
@type data: str
@return: an SFTP error code like L{SFTP_OK}.
:param offset: position in the file to start reading from.
:type offset: int or long
:param str data: data to write into the file.
:return: an SFTP error code like `.SFTP_OK`.
"""
writefile = getattr(self, 'writefile', None)
if writefile is None:
@ -148,26 +144,25 @@ class SFTPHandle (object):
def stat(self):
"""
Return an L{SFTPAttributes} object referring to this open file, or an
error code. This is equivalent to L{SFTPServerInterface.stat}, except
Return an `.SFTPAttributes` object referring to this open file, or an
error code. This is equivalent to `.SFTPServerInterface.stat`, except
it's called on an open file instead of a path.
@return: an attributes object for the given file, or an SFTP error
code (like L{SFTP_PERMISSION_DENIED}).
@rtype: L{SFTPAttributes} I{or error code}
:return:
an attributes object for the given file, or an SFTP error code
(like `.SFTP_PERMISSION_DENIED`).
:rtype: `.SFTPAttributes` or error code
"""
return SFTP_OP_UNSUPPORTED
def chattr(self, attr):
"""
Change the attributes of this file. The C{attr} object will contain
Change the attributes of this file. The ``attr`` object will contain
only those fields provided by the client in its request, so you should
check for the presence of fields before using them.
@param attr: the attributes to change on this file.
@type attr: L{SFTPAttributes}
@return: an error code like L{SFTP_OK}.
@rtype: int
:param .SFTPAttributes attr: the attributes to change on this file.
:return: an `int` error code like `.SFTP_OK`.
"""
return SFTP_OP_UNSUPPORTED

49
paramiko/sftp_server.py
View File

@ -40,28 +40,25 @@ _hash_class = {
class SFTPServer (BaseSFTP, SubsystemHandler):
"""
Server-side SFTP subsystem support. Since this is a L{SubsystemHandler},
it can be (and is meant to be) set as the handler for C{"sftp"} requests.
Use L{Transport.set_subsystem_handler} to activate this class.
Server-side SFTP subsystem support. Since this is a `.SubsystemHandler`,
it can be (and is meant to be) set as the handler for ``"sftp"`` requests.
Use `.Transport.set_subsystem_handler` to activate this class.
"""
def __init__(self, channel, name, server, sftp_si=SFTPServerInterface, *largs, **kwargs):
"""
The constructor for SFTPServer is meant to be called from within the
L{Transport} as a subsystem handler. C{server} and any additional
`.Transport` as a subsystem handler. ``server`` and any additional
parameters or keyword parameters are passed from the original call to
L{Transport.set_subsystem_handler}.
`.Transport.set_subsystem_handler`.
@param channel: channel passed from the L{Transport}.
@type channel: L{Channel}
@param name: name of the requested subsystem.
@type name: str
@param server: the server object associated with this channel and
subsystem
@type server: L{ServerInterface}
@param sftp_si: a subclass of L{SFTPServerInterface} to use for handling
individual requests.
@type sftp_si: class
:param .Channel channel: channel passed from the `.Transport`.
:param str name: name of the requested subsystem.
:param .ServerInterface server:
the server object associated with this channel and subsystem
:param class sftp_si:
a subclass of `.SFTPServerInterface` to use for handling individual
requests.
"""
BaseSFTP.__init__(self)
SubsystemHandler.__init__(self, channel, name, server)
@ -122,14 +119,12 @@ class SFTPServer (BaseSFTP, SubsystemHandler):
def convert_errno(e):
"""
Convert an errno value (as from an C{OSError} or C{IOError}) into a
Convert an errno value (as from an ``OSError`` or ``IOError``) into a
standard SFTP result code. This is a convenience function for trapping
exceptions in server code and returning an appropriate result.
@param e: an errno code, as from C{OSError.errno}.
@type e: int
@return: an SFTP error code like L{SFTP_NO_SUCH_FILE}.
@rtype: int
:param int e: an errno code, as from ``OSError.errno``.
:return: an `int` SFTP error code like ``SFTP_NO_SUCH_FILE``.
"""
if e == errno.EACCES:
# permission denied
@ -144,18 +139,16 @@ class SFTPServer (BaseSFTP, SubsystemHandler):
def set_file_attr(filename, attr):
"""
Change a file's attributes on the local filesystem. The contents of
C{attr} are used to change the permissions, owner, group ownership,
``attr`` are used to change the permissions, owner, group ownership,
and/or modification & access time of the file, depending on which
attributes are present in C{attr}.
attributes are present in ``attr``.
This is meant to be a handy helper function for translating SFTP file
requests into local file operations.
@param filename: name of the file to alter (should usually be an
absolute path).
@type filename: str
@param attr: attributes to change.
@type attr: L{SFTPAttributes}
:param str filename:
name of the file to alter (should usually be an absolute path).
:param .SFTPAttributes attr: attributes to change.
"""
if sys.platform != 'win32':
# mode operations are meaningless on win32
@ -296,7 +289,7 @@ class SFTPServer (BaseSFTP, SubsystemHandler):
self._send_packet(CMD_EXTENDED_REPLY, str(msg))
def _convert_pflags(self, pflags):
"convert SFTP-style open() flags to python's os.open() flags"
"convert SFTP-style open() flags to Python's os.open() flags"
if (pflags & SFTP_FLAG_READ) and (pflags & SFTP_FLAG_WRITE):
flags = os.O_RDWR
elif pflags & SFTP_FLAG_WRITE:

237
paramiko/sftp_si.py
View File

@ -17,7 +17,7 @@
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
L{SFTPServerInterface} is an interface to override for SFTP server support.
An interface to override for SFTP server support.
"""
import os
@ -29,7 +29,7 @@ from paramiko.sftp import *
class SFTPServerInterface (object):
"""
This class defines an interface for controlling the behavior of paramiko
when using the L{SFTPServer} subsystem to provide an SFTP server.
when using the `.SFTPServer` subsystem to provide an SFTP server.
Methods on this class are called from the SFTP session's thread, so you can
block as long as necessary without affecting other sessions (even other
@ -46,9 +46,8 @@ class SFTPServerInterface (object):
Create a new SFTPServerInterface object. This method does nothing by
default and is meant to be overridden by subclasses.
@param server: the server object associated with this channel and
SFTP subsystem
@type server: L{ServerInterface}
:param .ServerInterface server:
the server object associated with this channel and SFTP subsystem
"""
super(SFTPServerInterface, self).__init__(*largs, **kwargs)
@ -64,7 +63,7 @@ class SFTPServerInterface (object):
"""
The SFTP server session has just ended, either cleanly or via an
exception. This method is meant to be overridden to perform any
necessary cleanup before this C{SFTPServerInterface} object is
necessary cleanup before this `.SFTPServerInterface` object is
destroyed.
"""
pass
@ -72,103 +71,105 @@ class SFTPServerInterface (object):
def open(self, path, flags, attr):
"""
Open a file on the server and create a handle for future operations
on that file. On success, a new object subclassed from L{SFTPHandle}
on that file. On success, a new object subclassed from `.SFTPHandle`
should be returned. This handle will be used for future operations
on the file (read, write, etc). On failure, an error code such as
L{SFTP_PERMISSION_DENIED} should be returned.
`.SFTP_PERMISSION_DENIED` should be returned.
C{flags} contains the requested mode for opening (read-only,
write-append, etc) as a bitset of flags from the C{os} module:
- C{os.O_RDONLY}
- C{os.O_WRONLY}
- C{os.O_RDWR}
- C{os.O_APPEND}
- C{os.O_CREAT}
- C{os.O_TRUNC}
- C{os.O_EXCL}
(One of C{os.O_RDONLY}, C{os.O_WRONLY}, or C{os.O_RDWR} will always
``flags`` contains the requested mode for opening (read-only,
write-append, etc) as a bitset of flags from the ``os`` module:
- ``os.O_RDONLY``
- ``os.O_WRONLY``
- ``os.O_RDWR``
- ``os.O_APPEND``
- ``os.O_CREAT``
- ``os.O_TRUNC``
- ``os.O_EXCL``
(One of ``os.O_RDONLY``, ``os.O_WRONLY``, or ``os.O_RDWR`` will always
be set.)
The C{attr} object contains requested attributes of the file if it
The ``attr`` object contains requested attributes of the file if it
has to be created. Some or all attribute fields may be missing if
the client didn't specify them.
@note: The SFTP protocol defines all files to be in "binary" mode.
There is no equivalent to python's "text" mode.
.. note:: The SFTP protocol defines all files to be in "binary" mode.
There is no equivalent to Python's "text" mode.
@param path: the requested path (relative or absolute) of the file
to be opened.
@type path: str
@param flags: flags or'd together from the C{os} module indicating the
requested mode for opening the file.
@type flags: int
@param attr: requested attributes of the file if it is newly created.
@type attr: L{SFTPAttributes}
@return: a new L{SFTPHandle} I{or error code}.
@rtype L{SFTPHandle}
:param str path:
the requested path (relative or absolute) of the file to be opened.
:param int flags:
flags or'd together from the ``os`` module indicating the requested
mode for opening the file.
:param .SFTPAttributes attr:
requested attributes of the file if it is newly created.
:return: a new `.SFTPHandle` or error code.
"""
return SFTP_OP_UNSUPPORTED
def list_folder(self, path):
"""
Return a list of files within a given folder. The C{path} will use
posix notation (C{"/"} separates folder names) and may be an absolute
Return a list of files within a given folder. The ``path`` will use
posix notation (``"/"`` separates folder names) and may be an absolute
or relative path.
The list of files is expected to be a list of L{SFTPAttributes}
The list of files is expected to be a list of `.SFTPAttributes`
objects, which are similar in structure to the objects returned by
C{os.stat}. In addition, each object should have its C{filename}
``os.stat``. In addition, each object should have its ``filename``
field filled in, since this is important to a directory listing and
not normally present in C{os.stat} results. The method
L{SFTPAttributes.from_stat} will usually do what you want.
not normally present in ``os.stat`` results. The method
`.SFTPAttributes.from_stat` will usually do what you want.
In case of an error, you should return one of the C{SFTP_*} error
codes, such as L{SFTP_PERMISSION_DENIED}.
In case of an error, you should return one of the ``SFTP_*`` error
codes, such as `.SFTP_PERMISSION_DENIED`.
@param path: the requested path (relative or absolute) to be listed.
@type path: str
@return: a list of the files in the given folder, using
L{SFTPAttributes} objects.
@rtype: list of L{SFTPAttributes} I{or error code}
:param str path: the requested path (relative or absolute) to be listed.
:return:
a list of the files in the given folder, using `.SFTPAttributes`
objects.
@note: You should normalize the given C{path} first (see the
C{os.path} module) and check appropriate permissions before returning
the list of files. Be careful of malicious clients attempting to use
relative paths to escape restricted folders, if you're doing a direct
translation from the SFTP server path to your local filesystem.
.. note::
You should normalize the given ``path`` first (see the `os.path`
module) and check appropriate permissions before returning the list
of files. Be careful of malicious clients attempting to use
relative paths to escape restricted folders, if you're doing a
direct translation from the SFTP server path to your local
filesystem.
"""
return SFTP_OP_UNSUPPORTED
def stat(self, path):
"""
Return an L{SFTPAttributes} object for a path on the server, or an
Return an `.SFTPAttributes` object for a path on the server, or an
error code. If your server supports symbolic links (also known as
"aliases"), you should follow them. (L{lstat} is the corresponding
"aliases"), you should follow them. (`lstat` is the corresponding
call that doesn't follow symlinks/aliases.)
@param path: the requested path (relative or absolute) to fetch
file statistics for.
@type path: str
@return: an attributes object for the given file, or an SFTP error
code (like L{SFTP_PERMISSION_DENIED}).
@rtype: L{SFTPAttributes} I{or error code}
:param str path:
the requested path (relative or absolute) to fetch file statistics
for.
:return:
an `.SFTPAttributes` object for the given file, or an SFTP error
code (like `.SFTP_PERMISSION_DENIED`).
"""
return SFTP_OP_UNSUPPORTED
def lstat(self, path):
"""
Return an L{SFTPAttributes} object for a path on the server, or an
Return an `.SFTPAttributes` object for a path on the server, or an
error code. If your server supports symbolic links (also known as
"aliases"), you should I{not} follow them -- instead, you should
return data on the symlink or alias itself. (L{stat} is the
"aliases"), you should not follow them -- instead, you should
return data on the symlink or alias itself. (`stat` is the
corresponding call that follows symlinks/aliases.)
@param path: the requested path (relative or absolute) to fetch
file statistics for.
@type path: str
@return: an attributes object for the given file, or an SFTP error
code (like L{SFTP_PERMISSION_DENIED}).
@rtype: L{SFTPAttributes} I{or error code}
:param str path:
the requested path (relative or absolute) to fetch file statistics
for.
:type path: str
:return:
an `.SFTPAttributes` object for the given file, or an SFTP error
code (like `.SFTP_PERMISSION_DENIED`).
"""
return SFTP_OP_UNSUPPORTED
@ -176,11 +177,9 @@ class SFTPServerInterface (object):
"""
Delete a file, if possible.
@param path: the requested path (relative or absolute) of the file
to delete.
@type path: str
@return: an SFTP error code like L{SFTP_OK}.
@rtype: int
:param str path:
the requested path (relative or absolute) of the file to delete.
:return: an SFTP error code `int` like `.SFTP_OK`.
"""
return SFTP_OP_UNSUPPORTED
@ -192,83 +191,74 @@ class SFTPServerInterface (object):
probably a good idea to implement "move" in this method too, even for
files that cross disk partition boundaries, if at all possible.
@note: You should return an error if a file with the same name as
C{newpath} already exists. (The rename operation should be
.. note:: You should return an error if a file with the same name as
``newpath`` already exists. (The rename operation should be
non-desctructive.)
@param oldpath: the requested path (relative or absolute) of the
existing file.
@type oldpath: str
@param newpath: the requested new path of the file.
@type newpath: str
@return: an SFTP error code like L{SFTP_OK}.
@rtype: int
:param str oldpath:
the requested path (relative or absolute) of the existing file.
:param str newpath: the requested new path of the file.
:return: an SFTP error code `int` like `.SFTP_OK`.
"""
return SFTP_OP_UNSUPPORTED
def mkdir(self, path, attr):
"""
Create a new directory with the given attributes. The C{attr}
Create a new directory with the given attributes. The ``attr``
object may be considered a "hint" and ignored.
The C{attr} object will contain only those fields provided by the
client in its request, so you should use C{hasattr} to check for
the presense of fields before using them. In some cases, the C{attr}
The ``attr`` object will contain only those fields provided by the
client in its request, so you should use ``hasattr`` to check for
the presense of fields before using them. In some cases, the ``attr``
object may be completely empty.
@param path: requested path (relative or absolute) of the new
folder.
@type path: str
@param attr: requested attributes of the new folder.
@type attr: L{SFTPAttributes}
@return: an SFTP error code like L{SFTP_OK}.
@rtype: int
:param str path:
requested path (relative or absolute) of the new folder.
:param .SFTPAttributes attr: requested attributes of the new folder.
:return: an SFTP error code `int` like `.SFTP_OK`.
"""
return SFTP_OP_UNSUPPORTED
def rmdir(self, path):
"""
Remove a directory if it exists. The C{path} should refer to an
Remove a directory if it exists. The ``path`` should refer to an
existing, empty folder -- otherwise this method should return an
error.
@param path: requested path (relative or absolute) of the folder
to remove.
@type path: str
@return: an SFTP error code like L{SFTP_OK}.
@rtype: int
:param str path:
requested path (relative or absolute) of the folder to remove.
:return: an SFTP error code `int` like `.SFTP_OK`.
"""
return SFTP_OP_UNSUPPORTED
def chattr(self, path, attr):
"""
Change the attributes of a file. The C{attr} object will contain
Change the attributes of a file. The ``attr`` object will contain
only those fields provided by the client in its request, so you
should check for the presence of fields before using them.
@param path: requested path (relative or absolute) of the file to
change.
@type path: str
@param attr: requested attributes to change on the file.
@type attr: L{SFTPAttributes}
@return: an error code like L{SFTP_OK}.
@rtype: int
:param str path:
requested path (relative or absolute) of the file to change.
:param attr:
requested attributes to change on the file (an `.SFTPAttributes`
object)
:return: an error code `int` like `.SFTP_OK`.
"""
return SFTP_OP_UNSUPPORTED
def canonicalize(self, path):
"""
Return the canonical form of a path on the server. For example,
if the server's home folder is C{/home/foo}, the path
C{"../betty"} would be canonicalized to C{"/home/betty"}. Note
if the server's home folder is ``/home/foo``, the path
``"../betty"`` would be canonicalized to ``"/home/betty"``. Note
the obvious security issues: if you're serving files only from a
specific folder, you probably don't want this method to reveal path
names outside that folder.
You may find the python methods in C{os.path} useful, especially
C{os.path.normpath} and C{os.path.realpath}.
You may find the Python methods in ``os.path`` useful, especially
``os.path.normpath`` and ``os.path.realpath``.
The default implementation returns C{os.path.normpath('/' + path)}.
The default implementation returns ``os.path.normpath('/' + path)``.
"""
if os.path.isabs(path):
out = os.path.normpath(path)
@ -285,26 +275,23 @@ class SFTPServerInterface (object):
If the specified path doesn't refer to a symbolic link, an error
should be returned.
@param path: path (relative or absolute) of the symbolic link.
@type path: str
@return: the target path of the symbolic link, or an error code like
L{SFTP_NO_SUCH_FILE}.
@rtype: str I{or error code}
:param str path: path (relative or absolute) of the symbolic link.
:return:
the target `str` path of the symbolic link, or an error code like
`.SFTP_NO_SUCH_FILE`.
"""
return SFTP_OP_UNSUPPORTED
def symlink(self, target_path, path):
"""
Create a symbolic link on the server, as new pathname C{path},
with C{target_path} as the target of the link.
Create a symbolic link on the server, as new pathname ``path``,
with ``target_path`` as the target of the link.
@param target_path: path (relative or absolute) of the target for
this new symbolic link.
@type target_path: str
@param path: path (relative or absolute) of the symbolic link to
create.
@type path: str
@return: an error code like C{SFTP_OK}.
@rtype: int
:param str target_path:
path (relative or absolute) of the target for this new symbolic
link.
:param str path:
path (relative or absolute) of the symbolic link to create.
:return: an error code `int` like ``SFTP_OK``.
"""
return SFTP_OP_UNSUPPORTED

39
paramiko/ssh_exception.py
View File

@ -16,10 +16,6 @@
# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
Exceptions defined by paramiko.
"""
class SSHException (Exception):
"""
@ -34,7 +30,7 @@ class AuthenticationException (SSHException):
possible to retry with different credentials. (Other classes specify more
specific reasons.)
@since: 1.6
.. versionadded:: 1.6
"""
pass
@ -52,12 +48,11 @@ class BadAuthenticationType (AuthenticationException):
the server isn't allowing that type. (It may only allow public-key, for
example.)
@ivar allowed_types: list of allowed authentication types provided by the
server (possible values are: C{"none"}, C{"password"}, and
C{"publickey"}).
@type allowed_types: list
:ivar list allowed_types:
list of allowed authentication types provided by the server (possible
values are: ``"none"``, ``"password"``, and ``"publickey"``).
@since: 1.1
.. versionadded:: 1.1
"""
allowed_types = []
@ -82,12 +77,11 @@ class PartialAuthentication (AuthenticationException):
class ChannelException (SSHException):
"""
Exception raised when an attempt to open a new L{Channel} fails.
Exception raised when an attempt to open a new `.Channel` fails.
@ivar code: the error code returned by the server
@type code: int
:ivar int code: the error code returned by the server
@since: 1.6
.. versionadded:: 1.6
"""
def __init__(self, code, text):
SSHException.__init__(self, text)
@ -98,14 +92,11 @@ class BadHostKeyException (SSHException):
"""
The host key given by the SSH server did not match what we were expecting.
@ivar hostname: the hostname of the SSH server
@type hostname: str
@ivar key: the host key presented by the server
@type key: L{PKey}
@ivar expected_key: the host key expected
@type expected_key: L{PKey}
:ivar str hostname: the hostname of the SSH server
:ivar PKey got_key: the host key presented by the server
:ivar PKey expected_key: the host key expected
@since: 1.6
.. versionadded:: 1.6
"""
def __init__(self, hostname, got_key, expected_key):
SSHException.__init__(self, 'Host key for server %s does not match!' % hostname)
@ -118,10 +109,8 @@ class ProxyCommandFailure (SSHException):
"""
The "ProxyCommand" found in the .ssh/config file returned an error.
@ivar command: The command line that is generating this exception.
@type command: str
@ivar error: The error captured from the proxy command output.
@type error: str
:ivar str command: The command line that is generating this exception.
:ivar str error: The error captured from the proxy command output.
"""
def __init__(self, command, error):
SSHException.__init__(self,

816
paramiko/transport.py
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File diff suppressed because it is too large Load Diff

43
paramiko/util.py
View File

@ -34,7 +34,7 @@ from paramiko.common import *
from paramiko.config import SSHConfig
# Change by RogerB - python < 2.3 doesn't have enumerate so we implement it
# Change by RogerB - Python < 2.3 doesn't have enumerate so we implement it
if sys.version_info < (2,3):
class enumerate:
def __init__ (self, sequence):
@ -154,17 +154,13 @@ def generate_key_bytes(hashclass, salt, key, nbytes):
through a secure hash into some keyworthy bytes. This specific algorithm
is used for encrypting/decrypting private key files.
@param hashclass: class from L{Crypto.Hash} that can be used as a secure
hashing function (like C{MD5} or C{SHA}).
@type hashclass: L{Crypto.Hash}
@param salt: data to salt the hash with.
@type salt: string
@param key: human-entered password or passphrase.
@type key: string
@param nbytes: number of bytes to generate.
@type nbytes: int
@return: key data
@rtype: string
:param class hashclass:
class from `Crypto.Hash` that can be used as a secure hashing function
(like ``MD5`` or ``SHA``).
:param str salt: data to salt the hash with.
:param str key: human-entered password or passphrase.
:param int nbytes: number of bytes to generate.
:return: Key data `str`
"""
keydata = ''
digest = ''
@ -185,26 +181,25 @@ def generate_key_bytes(hashclass, salt, key, nbytes):
def load_host_keys(filename):
"""
Read a file of known SSH host keys, in the format used by openssh, and
return a compound dict of C{hostname -> keytype ->} L{PKey <paramiko.pkey.PKey>}.
The hostname may be an IP address or DNS name. The keytype will be either
C{"ssh-rsa"} or C{"ssh-dss"}.
return a compound dict of ``hostname -> keytype ->`` `PKey
<paramiko.pkey.PKey>`. The hostname may be an IP address or DNS name. The
keytype will be either ``"ssh-rsa"`` or ``"ssh-dss"``.
This type of file unfortunately doesn't exist on Windows, but on posix,
it will usually be stored in C{os.path.expanduser("~/.ssh/known_hosts")}.
it will usually be stored in ``os.path.expanduser("~/.ssh/known_hosts")``.
Since 1.5.3, this is just a wrapper around L{HostKeys}.
Since 1.5.3, this is just a wrapper around `.HostKeys`.
@param filename: name of the file to read host keys from
@type filename: str
@return: dict of host keys, indexed by hostname and then keytype
@rtype: dict(hostname, dict(keytype, L{PKey <paramiko.pkey.PKey>}))
:param str filename: name of the file to read host keys from
:return:
nested dict of `.PKey` objects, indexed by hostname and then keytype
"""
from paramiko.hostkeys import HostKeys
return HostKeys(filename)
def parse_ssh_config(file_obj):
"""
Provided only as a backward-compatible wrapper around L{SSHConfig}.
Provided only as a backward-compatible wrapper around `.SSHConfig`.
"""
config = SSHConfig()
config.parse(file_obj)
@ -212,12 +207,12 @@ def parse_ssh_config(file_obj):
def lookup_ssh_host_config(hostname, config):
"""
Provided only as a backward-compatible wrapper around L{SSHConfig}.
Provided only as a backward-compatible wrapper around `.SSHConfig`.
"""
return config.lookup(hostname)
def mod_inverse(x, m):
# it's crazy how small python can make this function.
# it's crazy how small Python can make this function.
u1, u2, u3 = 1, 0, m
v1, v2, v3 = 0, 1, x

6
sites/docs/api/agent.rst Normal file
View File

@ -0,0 +1,6 @@
SSH Agents
==========
.. automodule:: paramiko.agent
:inherited-members:
:no-special-members:

4
sites/docs/api/buffered_pipe.rst Normal file
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@ -0,0 +1,4 @@
Buffered pipes
==============
.. automodule:: paramiko.buffered_pipe

4
sites/docs/api/channel.rst Normal file
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@ -0,0 +1,4 @@
Channel
=======
.. automodule:: paramiko.channel

5
sites/docs/api/client.rst Normal file
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@ -0,0 +1,5 @@
Client
======
.. automodule:: paramiko.client
:member-order: bysource

5
sites/docs/api/config.rst Normal file
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@ -0,0 +1,5 @@
Configuration
=============
.. automodule:: paramiko.config
:member-order: bysource

4
sites/docs/api/file.rst Normal file
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@ -0,0 +1,4 @@
Buffered files
==============
.. automodule:: paramiko.file

5
sites/docs/api/hostkeys.rst Normal file
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@ -0,0 +1,5 @@
Host keys / ``known_hosts`` files
=================================
.. automodule:: paramiko.hostkeys
:member-order: bysource

6
sites/docs/api/keys.rst Normal file
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@ -0,0 +1,6 @@
Key handling
============
.. automodule:: paramiko.pkey
.. automodule:: paramiko.dsskey
.. automodule:: paramiko.rsakey

4
sites/docs/api/message.rst Normal file
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@ -0,0 +1,4 @@
Message
=======
.. automodule:: paramiko.message

4
sites/docs/api/packet.rst Normal file
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@ -0,0 +1,4 @@
Packetizer
==========
.. automodule:: paramiko.packet

4
sites/docs/api/pipe.rst Normal file
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@ -0,0 +1,4 @@
Cross-platform pipe implementations
===================================
.. automodule:: paramiko.pipe

4
sites/docs/api/proxy.rst Normal file
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@ -0,0 +1,4 @@
``ProxyCommand`` support
========================
.. automodule:: paramiko.proxy

5
sites/docs/api/server.rst Normal file
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@ -0,0 +1,5 @@
Server implementation
=====================
.. automodule:: paramiko.server
:member-order: bysource

13
sites/docs/api/sftp.rst Normal file
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@ -0,0 +1,13 @@
SFTP
====
.. automodule:: paramiko.sftp
.. automodule:: paramiko.sftp_client
.. automodule:: paramiko.sftp_server
.. automodule:: paramiko.sftp_attr
.. automodule:: paramiko.sftp_file
:inherited-members:
:no-special-members:
:show-inheritance:
.. automodule:: paramiko.sftp_handle
.. automodule:: paramiko.sftp_si

4
sites/docs/api/ssh_exception.rst Normal file
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@ -0,0 +1,4 @@
Exceptions
==========
.. automodule:: paramiko.ssh_exception

5
sites/docs/api/transport.rst Normal file
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@ -0,0 +1,5 @@
Transport
=========
.. automodule:: paramiko.transport
:member-order: bysource

12
sites/docs/conf.py
View File

@ -1,4 +1,16 @@
# Obtain shared config values
import os, sys
sys.path.append(os.path.abspath('..'))
sys.path.append(os.path.abspath('../..'))
from shared_conf import *
# Enable autodoc, intersphinx
extensions.extend(['sphinx.ext.autodoc', 'sphinx.ext.intersphinx'])
# Autodoc settings
autodoc_default_flags = ['members', 'special-members']
# Intersphinx connection to stdlib
intersphinx_mapping = {
'python': ('http://docs.python.org/2.6', None),
}

66
sites/docs/index.rst
View File

@ -1,6 +1,72 @@
====================================
Welcome to Paramiko's documentation!
====================================
This site covers Paramiko's usage & API documentation. For basic info on what
Paramiko is, including its public changelog & how the project is maintained,
please see `the main website <http://paramiko.org>`_.
API documentation
=================
The high-level client API starts with creation of an `.SSHClient` object. For
more direct control, pass a socket (or socket-like object) to a `.Transport`,
and use `start_server <.Transport.start_server>` or `start_client
<.Transport.start_client>` to negotiate with the remote host as either a server
or client.
As a client, you are responsible for authenticating using a password or private
key, and checking the server's host key. (Key signature and verification is
done by paramiko, but you will need to provide private keys and check that the
content of a public key matches what you expected to see.)
As a server, you are responsible for deciding which users, passwords, and keys
to allow, and what kind of channels to allow.
Once you have finished, either side may request flow-controlled `channels
<.Channel>` to the other side, which are Python objects that act like sockets,
but send and receive data over the encrypted session.
For details, please see the following tables of contents (which are organized
by area of interest.)
Core SSH protocol classes
-------------------------
.. toctree::
api/channel
api/client
api/message
api/packet
api/transport
Authentication & keys
---------------------
.. toctree::
api/agent
api/hostkeys
api/keys
Other primary functions
-----------------------
.. toctree::
api/config
api/proxy
api/server
api/sftp
Miscellany
----------
.. toctree::
api/buffered_pipe
api/file
api/pipe
api/ssh_exception

3
sites/www/changelog.rst
View File

@ -2,6 +2,9 @@
Changelog
=========
* :support:`256` Convert API documentation to Sphinx, yielding a new API
docs website to replace the old Epydoc one. Thanks to Olle Lundberg for the
initial conversion work.
* :bug:`-` Use constant-time hash comparison operations where possible, to
protect against `timing-based attacks
<http://codahale.com/a-lesson-in-timing-attacks/>`_. Thanks to Alex Gaynor

8
sites/www/conf.py
View File

@ -24,10 +24,10 @@ extensions.append('sphinx.ext.intersphinx')
target = join(dirname(__file__), '..', 'docs', '_build')
if os.environ.get('READTHEDOCS') == 'True':
# TODO: switch to docs.paramiko.org post go-live of sphinx API docs
target = 'http://paramiko-docs.readthedocs.org/en/latest/'
#intersphinx_mapping = {
# 'docs': (target, None),
#}
target = 'http://docs.paramiko.org/en/latest/'
intersphinx_mapping = {
'docs': (target, None),
}
# Sister-site links to API docs
html_theme_options['extra_nav_links'] = {

29
tasks.py
View File

@ -1,23 +1,27 @@
from os import mkdir
from os.path import join
from shutil import rmtree, copytree
from invoke import Collection, ctask as task
from invocations import docs as _docs
from invocations.packaging import publish
d = 'sites'
# Usage doc/API site (published as docs.paramiko.org)
path = join(d, 'docs')
docs_path = join(d, 'docs')
docs_build = join(docs_path, '_build')
docs = Collection.from_module(_docs, name='docs', config={
'sphinx.source': path,
'sphinx.target': join(path, '_build'),
'sphinx.source': docs_path,
'sphinx.target': docs_build,
})
# Main/about/changelog site ((www.)?paramiko.org)
path = join(d, 'www')
www_path = join(d, 'www')
www = Collection.from_module(_docs, name='www', config={
'sphinx.source': path,
'sphinx.target': join(path, '_build'),
'sphinx.source': www_path,
'sphinx.target': join(www_path, '_build'),
})
@ -31,4 +35,15 @@ def coverage(ctx):
ctx.run("coverage run --source=paramiko test.py --verbose")
ns = Collection(test, coverage, docs=docs, www=www)
# Until we stop bundling docs w/ releases. Need to discover use cases first.
@task('docs') # Will invoke the API doc site build
def release(ctx):
# Move the built docs into where Epydocs used to live
target = 'docs'
rmtree(target, ignore_errors=True)
copytree(docs_build, target)
# Publish
publish(ctx)
ns = Collection(test, coverage, release, docs=docs, www=www)