[project @ robey@master-shake.local-20060127030114-b6810c4c29964a4e]

code from mike looijmans for a windows interactive shell -- while i'm mucking around in here, clean up the demos a bit too

demos/demo.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 # Copyright (C) 2003-2005 Robey Pointer <robey@lag.net>
 #
@@ -19,38 +19,49 @@
 # 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 
 
-# ----- WINDOWS USERS PLEASE NOTE -----
+import base64
-# This demo won't work on Windows because it uses pseudo-terminals, which
+import getpass
-# are a posix-only feature.  check out the README file for a simpler demo.
+import os
+import select
+import socket
+import sys
+import threading
+import time
+import traceback
 
-
-import sys, os, socket, threading, getpass, time, base64, select, termios, tty, traceback
 import paramiko
+import interactive
 
 
-#####   utility functions
+def agent_auth(transport, username):
+    """
+    Attempt to authenticate to the given transport using any of the private
+    keys available from an SSH agent.
+    """
     
-def agent_auth(username, t, event):
     agent = paramiko.Agent()
     agent_keys = agent.get_keys()
-    if len(agent_keys) > 0:
+    if len(agent_keys) == 0:
+        return
+        
     for key in agent_keys:
         print 'Trying ssh-agent key %s' % paramiko.util.hexify(key.get_fingerprint()),
-            t.auth_publickey(username, key, event)
+        try:
-            event.wait(10)
+            transport.auth_publickey(username, key)
-            if t.is_authenticated():
             print '... success!'
             return
+        except SSHException:
             print '... nope.'
 
-def manual_auth(username, hostname, event):
+
+def manual_auth(username, hostname):
     default_auth = 'p'
     auth = raw_input('Auth by (p)assword, (r)sa key, or (d)ss key? [%s] ' % default_auth)
     if len(auth) == 0:
         auth = default_auth
 
     if auth == 'r':
-        default_path = os.environ['HOME'] + '/.ssh/id_rsa'
+        default_path = os.path.join(os.environ['HOME'], '.ssh', 'id_rsa')
         path = raw_input('RSA key [%s]: ' % default_path)
         if len(path) == 0:
             path = default_path
@@ -59,9 +70,9 @@ def manual_auth(username, hostname, event):
         except paramiko.PasswordRequiredException:
             password = getpass.getpass('RSA key password: ')
             key = paramiko.RSAKey.from_private_key_file(path, password)
-        t.auth_publickey(username, key, event)
+        t.auth_publickey(username, key)
     elif auth == 'd':
-        default_path = os.environ['HOME'] + '/.ssh/id_dsa'
+        default_path = os.path.join(os.environ['HOME'], '.ssh', 'id_dsa')
         path = raw_input('DSS key [%s]: ' % default_path)
         if len(path) == 0:
             path = default_path
@@ -70,18 +81,15 @@ def manual_auth(username, hostname, event):
         except paramiko.PasswordRequiredException:
             password = getpass.getpass('DSS key password: ')
             key = paramiko.DSSKey.from_private_key_file(path, password)
-        t.auth_publickey(username, key, event)
+        t.auth_publickey(username, key)
     else:
         pw = getpass.getpass('Password for %s@%s: ' % (username, hostname))
-        t.auth_password(username, pw, event)
+        t.auth_password(username, pw)
 
 
-#####   main demo
-
 # setup logging
 paramiko.util.log_to_file('demo.log')
 
-
 username = ''
 if len(sys.argv) > 1:
     hostname = sys.argv[1]
@@ -107,15 +115,11 @@ except Exception, e:
     sys.exit(1)
 
 try:
-    event = threading.Event()
     t = paramiko.Transport(sock)
-    t.start_client(event)
+    t.start_client()
-    # print repr(t)
-    event.wait(15)
     if not t.is_active():
         print '*** SSH negotiation failed.'
         sys.exit(1)
-    # print repr(t)
 
     try:
         keys = paramiko.util.load_host_keys(os.path.expanduser('~/.ssh/known_hosts'))
@@ -137,8 +141,6 @@ try:
     else:
         print '*** Host key OK.'
 
-    event.clear()
-
     # get username
     if username == '':
         default_username = getpass.getuser()
@@ -146,14 +148,9 @@ try:
         if len(username) == 0:
             username = default_username
 
-    agent_auth(username, t, event)
+    agent_auth(t, username)
-    
-    # ask for what kind of authentication to try
     if not t.is_authenticated():
-        manual_auth(username, hostname, event)
+        manual_auth(username, hostname)
-
-    event.wait(10)
-    # print repr(t)
     if not t.is_authenticated():
         print '*** Authentication failed. :('
         t.close()
@@ -164,38 +161,7 @@ try:
     chan.invoke_shell()
     print '*** Here we go!'
     print
-
+    interactive.interactive_shell(chan)
-    try:
-        oldtty = termios.tcgetattr(sys.stdin)
-        tty.setraw(sys.stdin.fileno())
-        tty.setcbreak(sys.stdin.fileno())
-        chan.settimeout(0.0)
-
-        while 1:
-            r, w, e = select.select([chan, sys.stdin], [], [])
-            if chan in r:
-                try:
-                    x = chan.recv(1024)
-                    if len(x) == 0:
-                        print
-                        print '*** EOF\r\n',
-                        break
-                    sys.stdout.write(x)
-                    sys.stdout.flush()
-                except socket.timeout:
-                    pass
-            if sys.stdin in r:
-                # FIXME: reading 1 byte at a time is incredibly dumb.
-                x = sys.stdin.read(1)
-                if len(x) == 0:
-                    print
-                    print '*** Bye.\r\n',
-                    break
-                chan.send(x)
-
-    finally:
-        termios.tcsetattr(sys.stdin, termios.TCSADRAIN, oldtty)
-
     chan.close()
     t.close()
 
@@ -208,3 +174,4 @@ except Exception, e:
         pass
     sys.exit(1)
 
+

demos/demo_simple.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 # Copyright (C) 2003-2005 Robey Pointer <robey@lag.net>
 #
@@ -19,13 +19,15 @@
 # 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 
 
-# ----- WINDOWS USERS PLEASE NOTE -----
+import base64
-# This demo won't work on Windows because it uses pseudo-terminals, which
+import getpass
-# are a posix-only feature.  check out the README file for a simpler demo.
+import os
+import socket
+import sys
+import traceback
 
-
-import sys, os, base64, getpass, socket, traceback, termios, tty, select
 import paramiko
+import interactive
 
 
 # setup logging
@@ -61,17 +63,17 @@ password = getpass.getpass('Password for %s@%s: ' % (username, hostname))
 hostkeytype = None
 hostkey = None
 try:
-    hkeys = paramiko.util.load_host_keys(os.path.expanduser('~/.ssh/known_hosts'))
+    host_keys = paramiko.util.load_host_keys(os.path.expanduser('~/.ssh/known_hosts'))
 except IOError:
     try:
-        hkeys = paramiko.util.load_host_keys(os.path.expanduser('~/ssh/known_hosts'))
+        host_keys = paramiko.util.load_host_keys(os.path.expanduser('~/ssh/known_hosts'))
     except IOError:
         print '*** Unable to open host keys file'
-        hkeys = {}
+        host_keys = {}
 
-if hkeys.has_key(hostname):
+if host_keys.has_key(hostname):
-    hostkeytype = hkeys[hostname].keys()[0]
+    hostkeytype = host_keys[hostname].keys()[0]
-    hostkey = hkeys[hostname][hostkeytype]
+    hostkey = host_keys[hostname][hostkeytype]
     print 'Using host key of type %s' % hostkeytype
 
 
@@ -84,37 +86,7 @@ try:
     chan.invoke_shell()
     print '*** Here we go!'
     print
-
+    interactive.interactive_shell(chan)
-    try:
-        oldtty = termios.tcgetattr(sys.stdin)
-        tty.setraw(sys.stdin.fileno())
-        tty.setcbreak(sys.stdin.fileno())
-        chan.settimeout(0.0)
-
-        while True:
-            r, w, e = select.select([chan, sys.stdin], [], [])
-            if chan in r:
-                try:
-                    x = chan.recv(1024)
-                    if len(x) == 0:
-                        print '\r\n*** EOF\r\n',
-                        break
-                    sys.stdout.write(x)
-                    sys.stdout.flush()
-                except socket.timeout:
-                    pass
-            if sys.stdin in r:
-                # FIXME: reading 1 byte at a time is incredibly dumb.
-                x = sys.stdin.read(1)
-                if len(x) == 0:
-                    print
-                    print '*** Bye.\r\n',
-                    break
-                chan.send(x)
-
-    finally:
-        termios.tcsetattr(sys.stdin, termios.TCSADRAIN, oldtty)
-
     chan.close()
     t.close()
 

demos/interactive.py

@@ -0,0 +1,97 @@
+# Copyright (C) 2003-2005 Robey Pointer <robey@lag.net>
+#
+# 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
+# Software Foundation; either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# Paramiko is distrubuted in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+
+
+import socket
+import sys
+
+# windows does not have termios...
+try:
+    import termios
+    import tty
+    has_termios = True
+except ImportError:
+    has_termios = False
+
+
+def interactive_shell(chan):
+    if has_termios:
+        posix_shell(chan)
+    else:
+        windows_shell(chan)
+
+
+def posix_shell(chan):
+    import select
+    
+    oldtty = termios.tcgetattr(sys.stdin)
+    try:
+        tty.setraw(sys.stdin.fileno())
+        tty.setcbreak(sys.stdin.fileno())
+        chan.settimeout(0.0)
+
+        while True:
+            r, w, e = select.select([chan, sys.stdin], [], [])
+            if chan in r:
+                try:
+                    x = chan.recv(1024)
+                    if len(x) == 0:
+                        print '\r\n*** EOF\r\n',
+                        break
+                    sys.stdout.write(x)
+                    sys.stdout.flush()
+                except socket.timeout:
+                    pass
+            if sys.stdin in r:
+                x = sys.stdin.read(1)
+                if len(x) == 0:
+                    break
+                chan.send(x)
+
+    finally:
+        termios.tcsetattr(sys.stdin, termios.TCSADRAIN, oldtty)
+
+    
+# thanks to Mike Looijmans for this code
+def windows_shell(chan):
+    import threading
+
+    sys.stdout.write("Line-buffered terminal emulation. Press F6 or ^Z to send EOF.\r\n\r\n")
+        
+    def writeall(sock):
+        while True:
+            data = sock.recv(256)
+            if not data:
+                sys.stdout.write('\r\n*** EOF ***\r\n\r\n')
+                sys.stdout.flush()
+                break
+            sys.stdout.write(data)
+            sys.stdout.flush()
+        
+    writer = threading.Thread(target=writeall, args=(chan,))
+    writer.start()
+        
+    try:
+        while True:
+            d = sys.stdin.read(1)
+            if not d:
+                break
+            chan.send(d)
+    except EOFError:
+        # user hit ^Z or F6
+        pass