[X2go-Commits] python-paramiko.git - sunweaver (branch) updated: 93c1a0da5d5ce2bbb1251bf7d77c336aedcb3332
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- Log -----------------------------------------------------------------
commit 93c1a0da5d5ce2bbb1251bf7d77c336aedcb3332
Merge: f5a2862 06d987c
Author: Mike Gabriel <mike.gabriel at das-netzwerkteam.de>
Date: Wed Nov 7 15:34:31 2012 +0100
Merge branch 'master' into sunweaver
-----------------------------------------------------------------------
Summary of changes:
.travis.yml | 2 +
NEWS | 21 ++++++++---
paramiko/__init__.py | 7 +++-
paramiko/client.py | 37 ++++++++++--------
paramiko/config.py | 56 +++++++++++++++++-----------
paramiko/packet.py | 4 +-
paramiko/proxy.py | 91 +++++++++++++++++++++++++++++++++++++++++++++
paramiko/ssh_exception.py | 17 +++++++++
paramiko/transport.py | 5 ++-
setup.py | 2 +-
tests/test_util.py | 48 +++++++++++++++++++++++-
11 files changed, 241 insertions(+), 49 deletions(-)
create mode 100644 paramiko/proxy.py
The diff of changes is:
diff --git a/.travis.yml b/.travis.yml
index 312a184..90dbb80 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,8 @@ install:
- pip install -e .
script: python test.py
notifications:
+ email:
+ on_failure: change
irc:
channels: "irc.freenode.org#fabric"
on_success: change
diff --git a/NEWS b/NEWS
index ed9fd00..5542046 100644
--- a/NEWS
+++ b/NEWS
@@ -12,12 +12,21 @@ Issues noted as "Fabric #NN" can be found at https://github.com/fabric/fabric/.
Releases
========
-v1.9.0 (DD MM YYYY)
--------------------
-
+v1.9.0 (6th Nov 2012)
+---------------------
-v1.8.1 (DD MM YYYY)
--------------------
+* #97 (with a little #93): Improve config parsing of `ProxyCommand` directives
+ and provide a wrapper class to allow subprocess-driven proxy commands to be
+ used as `sock=` arguments for `SSHClient.connect`.
+* #77: Allow `SSHClient.connect()` to take an explicit `sock` parameter
+ overriding creation of an internal, implicit socket object.
+* Thanks in no particular order to Erwin Bolwidt, Oskari Saarenmaa, Steven
+ Noonan, Vladimir Lazarenko, Lincoln de Sousa, Valentino Volonghi, Olle
+ Lundberg, and Github user `@acrish` for the various and sundry patches
+ leading to the above changes.
+
+v1.8.1 (6th Nov 2012)
+---------------------
* #90: Ensure that callbacks handed to `SFTPClient.get()` always fire at least
once, even for zero-length files downloaded. Thanks to Github user `@enB` for
@@ -32,6 +41,8 @@ v1.8.1 (DD MM YYYY)
v1.8.0 (3rd Oct 2012)
---------------------
+* #17 ('ssh' 28): Fix spurious `NoneType has no attribute 'error'` and similar
+ exceptions that crop up on interpreter exit.
* 'ssh' 32: Raise a more useful error explaining which `known_hosts` key line was
problematic, when encountering `binascii` issues decoding known host keys.
Thanks to `@thomasvs` for catch & patch.
diff --git a/paramiko/__init__.py b/paramiko/__init__.py
index 8c15853..29e470a 100644
--- a/paramiko/__init__.py
+++ b/paramiko/__init__.py
@@ -55,7 +55,7 @@ if sys.version_info < (2, 2):
__author__ = "Jeff Forcier <jeff at bitprophet.org>"
-__version__ = "1.8.0"
+__version__ = "1.9.0"
__license__ = "GNU Lesser General Public License (LGPL)"
@@ -65,7 +65,7 @@ from auth_handler import AuthHandler
from channel import Channel, ChannelFile
from ssh_exception import SSHException, PasswordRequiredException, \
BadAuthenticationType, ChannelException, BadHostKeyException, \
- AuthenticationException
+ AuthenticationException, ProxyCommandFailure
from server import ServerInterface, SubsystemHandler, InteractiveQuery
from rsakey import RSAKey
from dsskey import DSSKey
@@ -83,6 +83,7 @@ from agent import Agent, AgentKey
from pkey import PKey
from hostkeys import HostKeys
from config import SSHConfig
+from proxy import ProxyCommand
# fix module names for epydoc
for c in locals().values():
@@ -119,6 +120,8 @@ __all__ = [ 'Transport',
'BadAuthenticationType',
'ChannelException',
'BadHostKeyException',
+ 'ProxyCommand',
+ 'ProxyCommandFailure',
'SFTP',
'SFTPFile',
'SFTPHandle',
diff --git a/paramiko/client.py b/paramiko/client.py
index 21ee3be..0f05f30 100644
--- a/paramiko/client.py
+++ b/paramiko/client.py
@@ -234,7 +234,7 @@ class SSHClient (object):
def connect(self, hostname, port=SSH_PORT, username=None, password=None, pkey=None,
key_filename=None, timeout=None, allow_agent=True, look_for_keys=True,
- compress=False):
+ 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})
@@ -277,6 +277,9 @@ class SSHClient (object):
@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
@raise BadHostKeyException: if the server's host key could not be
verified
@@ -285,21 +288,23 @@ class SSHClient (object):
establishing an SSH session
@raise socket.error: if a socket error occurred while connecting
"""
- for (family, socktype, proto, canonname, sockaddr) in socket.getaddrinfo(hostname, port, socket.AF_UNSPEC, socket.SOCK_STREAM):
- if socktype == socket.SOCK_STREAM:
- af = family
- addr = sockaddr
- break
- else:
- # some OS like AIX don't indicate SOCK_STREAM support, so just guess. :(
- af, _, _, _, addr = socket.getaddrinfo(hostname, port, socket.AF_UNSPEC, socket.SOCK_STREAM)
- sock = socket.socket(af, socket.SOCK_STREAM)
- if timeout is not None:
- try:
- sock.settimeout(timeout)
- except:
- pass
- retry_on_signal(lambda: sock.connect(addr))
+ if not sock:
+ for (family, socktype, proto, canonname, sockaddr) in socket.getaddrinfo(hostname, port, socket.AF_UNSPEC, socket.SOCK_STREAM):
+ if socktype == socket.SOCK_STREAM:
+ af = family
+ addr = sockaddr
+ break
+ else:
+ # some OS like AIX don't indicate SOCK_STREAM support, so just guess. :(
+ af, _, _, _, addr = socket.getaddrinfo(hostname, port, socket.AF_UNSPEC, socket.SOCK_STREAM)
+ sock = socket.socket(af, socket.SOCK_STREAM)
+ if timeout is not None:
+ try:
+ sock.settimeout(timeout)
+ except:
+ pass
+ retry_on_signal(lambda: sock.connect(addr))
+
t = self._transport = Transport(sock)
t.use_compression(compress=compress)
if self._log_channel is not None:
diff --git a/paramiko/config.py b/paramiko/config.py
index 458d5dd..2828d90 100644
--- a/paramiko/config.py
+++ b/paramiko/config.py
@@ -22,9 +22,12 @@ L{SSHConfig}.
import fnmatch
import os
+import re
import socket
SSH_PORT=22
+proxy_re = re.compile(r"^(proxycommand)\s*=*\s*(.*)", re.I)
+
class SSHConfig (object):
"""
@@ -56,8 +59,13 @@ class SSHConfig (object):
if (line == '') or (line[0] == '#'):
continue
if '=' in line:
- key, value = line.split('=', 1)
- key = key.strip().lower()
+ # Ensure ProxyCommand gets properly split
+ if line.lower().strip().startswith('proxycommand'):
+ match = proxy_re.match(line)
+ key, value = match.group(1).lower(), match.group(2)
+ else:
+ key, value = line.split('=', 1)
+ key = key.strip().lower()
else:
# find first whitespace, and split there
i = 0
@@ -149,26 +157,30 @@ class SSHConfig (object):
host = socket.gethostname().split('.')[0]
fqdn = socket.getfqdn()
homedir = os.path.expanduser('~')
- replacements = {'controlpath' :
- [
- ('%h', config['hostname']),
- ('%l', fqdn),
- ('%L', host),
- ('%n', hostname),
- ('%p', port),
- ('%r', remoteuser),
- ('%u', user)
- ],
- 'identityfile' :
- [
- ('~', homedir),
- ('%d', homedir),
- ('%h', config['hostname']),
- ('%l', fqdn),
- ('%u', user),
- ('%r', remoteuser)
- ]
- }
+ replacements = {
+ 'controlpath': [
+ ('%h', config['hostname']),
+ ('%l', fqdn),
+ ('%L', host),
+ ('%n', hostname),
+ ('%p', port),
+ ('%r', remoteuser),
+ ('%u', user)
+ ],
+ 'identityfile': [
+ ('~', homedir),
+ ('%d', homedir),
+ ('%h', config['hostname']),
+ ('%l', fqdn),
+ ('%u', user),
+ ('%r', remoteuser)
+ ],
+ 'proxycommand': [
+ ('%h', config['hostname']),
+ ('%p', port),
+ ('%r', remoteuser),
+ ],
+ }
for k in config:
if k in replacements:
for find, replace in replacements[k]:
diff --git a/paramiko/packet.py b/paramiko/packet.py
index 9782061..5d918e2 100644
--- a/paramiko/packet.py
+++ b/paramiko/packet.py
@@ -29,7 +29,7 @@ import time
from paramiko.common import *
from paramiko import util
-from paramiko.ssh_exception import SSHException
+from paramiko.ssh_exception import SSHException, ProxyCommandFailure
from paramiko.message import Message
@@ -254,6 +254,8 @@ class Packetizer (object):
retry_write = True
else:
n = -1
+ except ProxyCommandFailure:
+ raise # so it doesn't get swallowed by the below catchall
except Exception:
# could be: (32, 'Broken pipe')
n = -1
diff --git a/paramiko/proxy.py b/paramiko/proxy.py
new file mode 100644
index 0000000..218b76e
--- /dev/null
+++ b/paramiko/proxy.py
@@ -0,0 +1,91 @@
+# Copyright (C) 2012 Yipit, Inc <coders at yipit.com>
+#
+# 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.
+
+"""
+L{ProxyCommand}.
+"""
+
+import os
+from shlex import split as shlsplit
+import signal
+from subprocess import Popen, PIPE
+
+from paramiko.ssh_exception import ProxyCommandFailure
+
+
+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
+ 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.
+
+ @param command_line: the command that should be executed and
+ used as the proxy.
+ @type command_line: str
+ """
+ self.cmd = shlsplit(command_line)
+ self.process = Popen(self.cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE)
+
+ def send(self, content):
+ """
+ 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
+ """
+ try:
+ self.process.stdin.write(content)
+ except IOError, e:
+ # There was a problem with the child process. It probably
+ # died and we can't proceed. The best option here is to
+ # raise an exception informing the user that the informed
+ # ProxyCommand is not working.
+ raise BadProxyCommand(' '.join(self.cmd), e.strerror)
+ return len(content)
+
+ def recv(self, size):
+ """
+ Read from the standard output of the forked program.
+
+ @param size: how many chars should be read
+ @type size: int
+
+ @return: the length of the read content
+ @rtype: int
+ """
+ try:
+ return os.read(self.process.stdout.fileno(), size)
+ except IOError, e:
+ raise BadProxyCommand(' '.join(self.cmd), e.strerror)
+
+ def close(self):
+ os.kill(self.process.pid, signal.SIGTERM)
+
+ def settimeout(self, timeout):
+ # Timeouts are meaningless for this implementation, but are part of the
+ # spec, so must be present.
+ pass
diff --git a/paramiko/ssh_exception.py b/paramiko/ssh_exception.py
index 68924d0..f2406dc 100644
--- a/paramiko/ssh_exception.py
+++ b/paramiko/ssh_exception.py
@@ -113,3 +113,20 @@ class BadHostKeyException (SSHException):
self.key = got_key
self.expected_key = expected_key
+
+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
+ """
+ def __init__(self, command, error):
+ SSHException.__init__(self,
+ '"ProxyCommand (%s)" returned non-zero exit status: %s' % (
+ command, error
+ )
+ )
+ self.error = error
diff --git a/paramiko/transport.py b/paramiko/transport.py
index 04680a9..c801031 100644
--- a/paramiko/transport.py
+++ b/paramiko/transport.py
@@ -44,7 +44,8 @@ from paramiko.primes import ModulusPack
from paramiko.rsakey import RSAKey
from paramiko.server import ServerInterface
from paramiko.sftp_client import SFTPClient
-from paramiko.ssh_exception import SSHException, BadAuthenticationType, ChannelException
+from paramiko.ssh_exception import (SSHException, BadAuthenticationType,
+ ChannelException, ProxyCommandFailure)
from paramiko.util import retry_on_signal
from Crypto import Random
@@ -1674,6 +1675,8 @@ class Transport (threading.Thread):
timeout = 2
try:
buf = self.packetizer.readline(timeout)
+ except ProxyCommandFailure:
+ raise
except Exception, x:
raise SSHException('Error reading SSH protocol banner' + str(x))
if buf[:4] == 'SSH-':
diff --git a/setup.py b/setup.py
index 73407b0..1bb1a71 100644
--- a/setup.py
+++ b/setup.py
@@ -52,7 +52,7 @@ if sys.platform == 'darwin':
setup(name = "paramiko",
- version = "1.8.0",
+ version = "1.9.0",
description = "SSH2 protocol library",
author = "Jeff Forcier",
author_email = "jeff at bitprophet.org",
diff --git a/tests/test_util.py b/tests/test_util.py
index 458709b..093a215 100644
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -27,6 +27,7 @@ import os
import unittest
from Crypto.Hash import SHA
import paramiko.util
+from paramiko.util import lookup_ssh_host_config as host_config
from util import ParamikoTest
@@ -151,7 +152,7 @@ class UtilTest(ParamikoTest):
x = rng.read(32)
self.assertEquals(len(x), 32)
- def test_7_host_config_expose_issue_33(self):
+ def test_7_host_config_expose_ssh_issue_33(self):
test_config_file = """
Host www13.*
Port 22
@@ -194,3 +195,48 @@ Host *
raise AssertionError('foo')
self.assertRaises(AssertionError,
lambda: paramiko.util.retry_on_signal(raises_other_exception))
+
+ def test_9_proxycommand_config_equals_parsing(self):
+ """
+ ProxyCommand should not split on equals signs within the value.
+ """
+ conf = """
+Host space-delimited
+ ProxyCommand foo bar=biz baz
+
+Host equals-delimited
+ ProxyCommand=foo bar=biz baz
+"""
+ f = cStringIO.StringIO(conf)
+ config = paramiko.util.parse_ssh_config(f)
+ for host in ('space-delimited', 'equals-delimited'):
+ self.assertEquals(
+ host_config(host, config)['proxycommand'],
+ 'foo bar=biz baz'
+ )
+
+ def test_10_proxycommand_interpolation(self):
+ """
+ ProxyCommand should perform interpolation on the value
+ """
+ config = paramiko.util.parse_ssh_config(cStringIO.StringIO("""
+Host *
+ Port 25
+ ProxyCommand host %h port %p
+
+Host specific
+ Port 37
+ ProxyCommand host %h port %p lol
+
+Host portonly
+ Port 155
+"""))
+ for host, val in (
+ ('foo.com', "host foo.com port 25"),
+ ('specific', "host specific port 37 lol"),
+ ('portonly', "host portonly port 155"),
+ ):
+ self.assertEquals(
+ host_config(host, config)['proxycommand'],
+ val
+ )
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