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Diffstat (limited to 'forward.py')
| -rw-r--r-- | forward.py | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/forward.py b/forward.py deleted file mode 100644 index f91e969..0000000 --- a/forward.py +++ /dev/null @@ -1,219 +0,0 @@ -#!/usr/bin/python - -# 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. - -""" -Sample script showing how to do local port forwarding over paramiko. - -This script connects to the requested SSH server and sets up local port -forwarding (the openssh -L option) from a local port through a tunneled -connection to a destination reachable from the SSH server machine. -""" - -import sys -import os -import socket -import select -import SocketServer -import getpass -import base64 -from optparse import OptionParser - -import paramiko - -DEFAULT_PORT = 4000 -SSH_PORT = 22 -VERBOSE = True -READPASS = False - - -class ForwardServer (SocketServer.ThreadingTCPServer): - daemon_threads = True - allow_reuse_address = True - - -class Handler (SocketServer.BaseRequestHandler): - - def handle(self): - try: - chan = self.ssh_transport.open_channel('direct-tcpip', - (self.chain_host, self.chain_port), - self.request.getpeername()) - except Exception, e: - verbose('Incoming request to %s:%d failed: %s' % (self.chain_host, - self.chain_port, - repr(e))) - return - - verbose('Connected! Tunnel open.') - while True: - r, w, x = select.select([self.request, chan], [], []) - if self.request in r: - data = self.request.recv(1024) - if len(data) == 0: - break - chan.send(data) - if chan in r: - data = chan.recv(1024) - if len(data) == 0: - break - self.request.send(data) - chan.close() - self.request.close() - verbose('Tunnel closed.') - - -def forward_tunnel(local_port, remote_host, remote_port, transport): - # this is a little convoluted, but lets me configure things for the Handler - # object. (SocketServer doesn't give Handlers any way to access the outer - # server normally.) - class SubHander (Handler): - chain_host = remote_host - chain_port = remote_port - ssh_transport = transport - ForwardServer(('', local_port), SubHander).serve_forever() - -def find_default_key_file(): - filename = os.path.expanduser('~/.ssh/id_rsa') - if os.access(filename, os.R_OK): - return filename - filename = os.path.expanduser('~/ssh/id_rsa') - if os.access(filename, os.R_OK): - return filename - filename = os.path.expanduser('~/.ssh/id_dsa') - if os.access(filename, os.R_OK): - return filename - filename = os.path.expanduser('~/ssh/id_dsa') - if os.access(filename, os.R_OK): - return filename - return '' - -def verbose(s): - if VERBOSE: - print s - - -##### - - -parser = OptionParser(usage='usage: %prog [options] <remote-addr>:<remote-port>', - version='%prog 1.0') -parser.add_option('-q', '--quiet', action='store_false', dest='verbose', default=VERBOSE, - help='squelch all informational output') -parser.add_option('-l', '--local-port', action='store', type='int', dest='port', - default=DEFAULT_PORT, - help='local port to forward (default: %d)' % DEFAULT_PORT) -parser.add_option('-r', '--host', action='store', type='string', dest='ssh_host', - help='SSH host to tunnel through (required)') -parser.add_option('-p', '--port', action='store', type='int', dest='ssh_port', default=SSH_PORT, - help='SSH port to tunnel through (default: %d)' % SSH_PORT) -parser.add_option('-u', '--user', action='store', type='string', dest='user', - default=getpass.getuser(), - help='username for SSH authentication (default: %s)' % getpass.getuser()) -parser.add_option('-K', '--key', action='store', type='string', dest='keyfile', - default=find_default_key_file(), - help='private key file to use for SSH authentication') -parser.add_option('', '--no-key', action='store_false', dest='use_key', default=True, - help='don\'t look for or use a private key file') -parser.add_option('-P', '--password', action='store_true', dest='readpass', default=READPASS, - help='read password (for key or password auth) from stdin') -options, args = parser.parse_args() - -VERBOSE = options.verbose -READPASS = options.readpass - - -if len(args) != 1: - parser.error('Incorrect number of arguments.') -remote_host = args[0] -if ':' not in remote_host: - parser.error('Remote port missing.') -remote_host, remote_port = remote_host.split(':', 1) -try: - remote_port = int(remote_port) -except: - parser.error('Remote port must be a number.') - -if not options.ssh_host: - parser.error('SSH host is required.') -if ':' in options.ssh_host: - options.ssh_host, options.ssh_port = options.ssh_host.split(':', 1) - try: - options.ssh_port = int(options.ssh_port) - except: - parser.error('SSH port must be a number.') - -try: - host_keys = paramiko.util.load_host_keys(os.path.expanduser('~/.ssh/known_hosts')) -except IOError: - try: - host_keys = paramiko.util.load_host_keys(os.path.expanduser('~/ssh/known_hosts')) - except IOError: - print '*** Unable to open host keys file' - host_keys = {} - -if not host_keys.has_key(options.ssh_host): - print '*** Warning: no host key for %s' % options.ssh_host - expected_host_key_type = None - expected_host_key = None -else: - expected_host_key_type = host_keys[options.ssh_host].keys()[0] - expected_host_key = host_keys[options.ssh_host][expected_host_key_type] - -key = None -password = None -if options.use_key: - try: - key = paramiko.RSAKey.from_private_key_file(options.keyfile) - except paramiko.PasswordRequiredException: - if not READPASS: - print '*** Password needed for keyfile (use -P): %s' % options.keyfile - sys.exit(1) - key_password = getpass.getpass('Enter password for key: ') - try: - key = paramiko.RSAKey.from_private_key_file(options.keyfile, key_password) - except: - print '*** Unable to read keyfile: %s' % options.keyfile - sys.exit(1) - except: - pass - -if key is None: - # try reading a password then - if not READPASS: - print '*** Either a valid private key or password is required (use -K or -P).' - sys.exit(1) - password = getpass.getpass('Enter password: ') - -verbose('Connecting to ssh host %s:%d ...' % (options.ssh_host, options.ssh_port)) - -transport = paramiko.Transport((options.ssh_host, options.ssh_port)) -transport.connect(hostkeytype=expected_host_key_type, - hostkey=expected_host_key, - username=options.user, - password=password, - pkey=key) - -verbose('Now forwarding port %d to %s:%d ...' % (options.port, remote_host, remote_port)) - -try: - forward_tunnel(options.port, remote_host, remote_port, transport) -except KeyboardInterrupt: - print 'Port forwarding stopped.' - sys.exit(0) |