[project @ Arch-1:robey@lag.net--2005-master-shake%paramiko--dev--1--patch-8]

add unit tests for the packetizer, and fix a little locking bug where i think more of the packetizer write function should be inside a lock

README

@@ -226,10 +226,10 @@ v0.9 FEAROW
 ***  MISSING LINKS
 
 * ctr forms of ciphers are missing (blowfish-ctr, aes128-ctr, aes256-ctr)
-* server mode needs better documentation
-* why are big files so slow to transfer?  profiling needed...
 
 * would be nice to have an ftp-like interface to sftp (put, get, chdir...)
 
+* why are big files so slow to transfer?  profiling needed...
 * speed up file transfers!
 * what is psyco?
+* make a simple example demonstrating use of SocketServer

paramiko/__init__.py

@@ -66,7 +66,8 @@ __version__ = "1.3 (marowak)"
 __license__ = "GNU Lesser General Public License (LGPL)"
 
 
-import transport, auth_transport, channel, rsakey, dsskey, message, ssh_exception, file
+import transport, auth_transport, channel, rsakey, dsskey, message
+import ssh_exception, file, packet
 import sftp, sftp_client, sftp_attr, sftp_file, sftp_handle, sftp_server, sftp_si
 
 randpool = transport.randpool
@@ -89,6 +90,7 @@ ServerInterface = server.ServerInterface
 SubsystemHandler = server.SubsystemHandler
 SecurityOptions = transport.SecurityOptions
 BufferedFile = file.BufferedFile
+Packetizer = packet.Packetizer
 
 from common import AUTH_SUCCESSFUL, AUTH_PARTIALLY_SUCCESSFUL, AUTH_FAILED, \
      OPEN_SUCCEEDED, OPEN_FAILED_ADMINISTRATIVELY_PROHIBITED,  OPEN_FAILED_CONNECT_FAILED, \

paramiko/packet.py

@@ -226,13 +226,13 @@ class Packetizer (object):
         packet = self._build_packet(data)
         if self.__dump_packets:
             self._log(DEBUG, util.format_binary(packet, 'OUT: '))
+        self.__write_lock.acquire()
+        try:
             if self.__block_engine_out != None:
                 out = self.__block_engine_out.encrypt(packet)
             else:
                 out = packet
             # + mac
-        self.__write_lock.acquire()
-        try:
             if self.__block_engine_out != None:
                 payload = struct.pack('>I', self.__sequence_number_out) + packet
                 out += HMAC.HMAC(self.__mac_key_out, payload, self.__mac_engine_out).digest()[:self.__mac_size_out]

test.py

@@ -32,6 +32,7 @@ from test_message import MessageTest
 from test_file import BufferedFileTest
 from test_pkey import KeyTest
 from test_kex import KexTest
+from test_packetizer import PacketizerTest
 from test_transport import TransportTest
 from test_sftp import SFTPTest
 
@@ -87,6 +88,7 @@ suite.addTest(unittest.makeSuite(BufferedFileTest))
 if options.use_pkey:
     suite.addTest(unittest.makeSuite(KeyTest))
 suite.addTest(unittest.makeSuite(KexTest))
+suite.addTest(unittest.makeSuite(PacketizerTest))
 if options.use_transport:
     suite.addTest(unittest.makeSuite(TransportTest))
 if options.use_sftp:

tests/test_packetizer.py

@@ -0,0 +1,70 @@
+# 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.
+
+"""
+Some unit tests for the ssh2 protocol in Transport.
+"""
+
+import unittest
+from loop import LoopSocket
+from Crypto.Cipher import AES
+from Crypto.Hash import SHA, HMAC
+from paramiko import Message, Packetizer, util
+
+class PacketizerTest (unittest.TestCase):
+
+    def test_1_write (self):
+        rsock = LoopSocket()
+        wsock = LoopSocket()
+        rsock.link(wsock)
+        p = Packetizer(wsock)
+        p.set_log(util.get_logger('paramiko.transport'))
+        p.set_hexdump(True)
+        cipher = AES.new('\x00' * 16, AES.MODE_CBC, '\x55' * 16)
+        p.set_outbound_cipher(cipher, 16, SHA, 12, '\x1f' * 20)
+
+        # message has to be at least 16 bytes long, so we'll have at least one
+        # block of data encrypted that contains zero random padding bytes
+        m = Message()
+        m.add_byte(chr(100))
+        m.add_int(100)
+        m.add_int(1)
+        m.add_int(900)
+        p.send_message(m)
+        data = rsock.recv(100)
+        # 32 + 12 bytes of MAC = 44
+        self.assertEquals(44, len(data))
+        self.assertEquals('\x43\x91\x97\xbd\x5b\x50\xac\x25\x87\xc2\xc4\x6b\xc7\xe9\x38\xc0', data[:16])
+    
+    def test_2_read (self):
+        rsock = LoopSocket()
+        wsock = LoopSocket()
+        rsock.link(wsock)
+        p = Packetizer(rsock)
+        p.set_log(util.get_logger('paramiko.transport'))
+        p.set_hexdump(True)
+        cipher = AES.new('\x00' * 16, AES.MODE_CBC, '\x55' * 16)
+        p.set_inbound_cipher(cipher, 16, SHA, 12, '\x1f' * 20)
+        
+        wsock.send('C\x91\x97\xbd[P\xac%\x87\xc2\xc4k\xc7\xe98\xc0' + \
+                   '\x90\xd2\x16V\rqsa8|L=\xfb\x97}\xe2n\x03\xb1\xa0\xc2\x1c\xd6AAL\xb4Y')
+        cmd, m = p.read_message()
+        self.assertEquals(100, cmd)
+        self.assertEquals(100, m.get_int())
+        self.assertEquals(1, m.get_int())
+        self.assertEquals(900, m.get_int())