/usr/share/pyshared/x2go/_paramiko.py is in python-x2go 0.4.0.8-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | # -*- coding: utf-8 -*-
# Copyright (C) 2010-2013 by Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
#
# Python X2Go is free software; you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# Python X2Go is distributed 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program; if not, write to the
# Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
"""\
Monkey Patch and feature map for Python Paramiko
"""
import paramiko
import re
from paramiko.config import SSH_PORT
import platform
from utils import compare_versions
PARAMIKO_VERSION = paramiko.__version__.split()[0]
PARAMIKO_FEATURE = {
'forward-ssh-agent': compare_versions(PARAMIKO_VERSION, ">=", '1.8.0') and (platform.system() != "Windows"),
'use-compression': compare_versions(PARAMIKO_VERSION, ">=", '1.7.7.1'),
'hash-host-entries': compare_versions(PARAMIKO_VERSION, ">=", '99'),
'host-entries-reloadable': compare_versions(PARAMIKO_VERSION, ">=", '1.11.0'),
'preserve-known-hosts': compare_versions(PARAMIKO_VERSION, ">=", '1.11.0'),
}
def _SSHClient_save_host_keys(self, filename):
"""\
Available since paramiko 1.11.0...
This method has been taken from SSHClient class in Paramiko and
has been improved and adapted to latest SSH implementations.
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}.
@param filename: the filename to save to
@type filename: str
@raise IOError: if the file could not be written
"""
# update local host keys from file (in case other SSH clients
# have written to the known_hosts file meanwhile.
if self.known_hosts is not None:
self.load_host_keys(self.known_hosts)
f = open(filename, 'w')
#f.write('# SSH host keys collected by paramiko\n')
_host_keys = self.get_host_keys()
for hostname, keys in _host_keys.iteritems():
for keytype, key in keys.iteritems():
f.write('%s %s %s\n' % (hostname, keytype, key.get_base64()))
f.close()
def _HostKeys_load(self, filename):
"""\
Available since paramiko 1.11.0...
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 line in f:
line = line.strip()
if (len(line) == 0) or (line[0] == '#'):
continue
e = paramiko.hostkeys.HostKeyEntry.from_line(line)
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 _HostKeys_add(self, hostname, keytype, key, hash_hostname=True):
"""\
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}
"""
# IPv4 and IPv6 addresses using the SSH default port need to be stripped off the port number
if re.match('^\[.*\]\:'+str(SSH_PORT)+'$', hostname):
# so stripping off the port and the square brackets here...
hostname = hostname.split(':')[-2].lstrip('[').rstrip(']')
for e in self._entries:
if (hostname in e.hostnames) and (e.key.get_name() == keytype):
e.key = key
return
if not hostname.startswith('|1|') and hash_hostname:
hostname = self.hash_host(hostname)
self._entries.append(paramiko.hostkeys.HostKeyEntry([hostname], key))
def monkey_patch_paramiko():
if not PARAMIKO_FEATURE['preserve-known-hosts']:
paramiko.SSHClient.save_host_keys = _SSHClient_save_host_keys
if not PARAMIKO_FEATURE['host-entries-reloadable']:
paramiko.hostkeys.HostKeys.load = _HostKeys_load
if not PARAMIKO_FEATURE['hash-host-entries']:
paramiko.hostkeys.HostKeys.add = _HostKeys_add
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