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ssh-mole
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ssh-mole
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# ┏━┓┏━┓╻ ╻ ┏┳┓┏━┓╻ ┏━╸
# ┗━┓┗━┓┣━┫╺━╸┃┃┃┃ ┃┃ ┣╸
# ┗━┛┗━┛╹ ╹ ╹ ╹┗━┛┗━╸┗━╸
# MIT License
#
# Copyright (c) 2017 Shane R. Spencer
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
from __future__ import print_function, unicode_literals
import os
import sys
import socket
import tempfile
import select
import struct
import argparse
__git_ident__ = '$Id$'
__git_export_subst__ = '$Format:%ci$ ($Format:%h$)'
__version__ = '0.01'
RECV_SIZE = 1024
# FROM: http://api.libssh.org/rfc/PROTOCOL.agent
SSH_AGENTC_REQUEST_RSA_IDENTITIES = 1
SSH_AGENTC_RSA_CHALLENGE = 3
SSH_AGENTC_ADD_RSA_IDENTITY = 7
SSH_AGENTC_REMOVE_RSA_IDENTITY = 8
SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES = 9
SSH_AGENTC_ADD_RSA_ID_CONSTRAINED = 24
SSH2_AGENTC_REQUEST_IDENTITIES = 11
SSH2_AGENTC_SIGN_REQUEST = 13
SSH2_AGENTC_ADD_IDENTITY = 17
SSH2_AGENTC_REMOVE_IDENTITY = 18
SSH2_AGENTC_REMOVE_ALL_IDENTITIES = 19
SSH2_AGENTC_ADD_ID_CONSTRAINED = 25
SSH_AGENTC_ADD_SMARTCARD_KEY = 20
SSH_AGENTC_REMOVE_SMARTCARD_KEY = 21
SSH_AGENTC_LOCK = 22
SSH_AGENTC_UNLOCK = 23
SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED = 26
SSH_AGENT_FAILURE = 5
SSH_AGENT_SUCCESS = 6
SSH_AGENT_RSA_IDENTITIES_ANSWER = 2
SSH_AGENT_RSA_RESPONSE = 4
SSH2_AGENT_IDENTITIES_ANSWER = 12
SSH2_AGENT_SIGN_RESPONSE = 14
SSH_AGENT_CONSTRAIN_LIFETIME = 1
SSH_AGENT_CONSTRAIN_CONFIRM = 2
SSH_AGENT_REQUEST_TYPES = [
x for x in locals().keys() if x.startswith('SSH_AGENTC') or x.startswith('SSH2_AGENTC')
]
SSH_MOLEC_SEND_SOURCE_FILE = -1
SSH_MOLEC_RECEIVE = 200
SSH_MOLEC_RECEIVE_STREAM = 201
SSH_MOLEC_SEND = 220
SSH_MOLEC_SEND_STREAM = 221
SSH_MOLE_FAILURE = SSH_AGENT_FAILURE
SSH_MOLE_SUCCESS = SSH_AGENT_SUCCESS
SSH_MOLE_REQUEST_TYPES = [
x for x in locals().keys() if x.startswith('SSH_MOLEC')
]
# ┏┳┓┏━┓╻┏┓╻
# ┃┃┃┣━┫┃┃┗┫
# ╹ ╹╹ ╹╹╹ ╹
def main_old():
p = argparse.ArgumentParser()
p.add_argument('command')
p.add_argument('remaining', nargs=argparse.REMAINDER)
args = p.parse_args()
listen_file_fileno, listen_file_path = tempfile.mkstemp()
os.close(listen_file_fileno)
os.remove(listen_file_path)
fork_pid = os.fork()
if fork_pid == 0:
os.environ['SSH_ORIG_AUTH_SOCK'] = os.environ['SSH_AUTH_SOCK']
os.environ['SSH_AUTH_SOCK'] = listen_file_path
os.execvp(args.remaining[0], args.remaining)
else:
socket_data_by_fileno = {}
def close_socket_delete_data(socket_data):
if not socket_data:
return
try:
socket_data['socket'].close()
except:
pass
try:
del(socket_data_by_fileno[socket_data['fileno']])
except:
pass
def create_socket_data(type, socket):
""" Create a self referencing dict with common socket parameters """
data = {
'type': type,
'socket': socket,
'fileno': socket.fileno()
}
data[type + '_data'] = data
return data
listen_socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
listen_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
listen_socket.bind(listen_file_path)
listen_socket.listen(5)
listen_data = create_socket_data('listen', listen_socket)
socket_data_by_fileno[listen_socket.fileno()] = listen_data
while True:
wait_child_pid, wait_child_status = os.waitpid(fork_pid, os.P_NOWAIT)
if wait_child_pid == fork_pid:
break
##fixme
import time
time.sleep(0.1)
socket_fileno_read_list, socket_fileno_write_list, socket_fileno_error_list = select.select(
socket_data_by_fileno.keys(),
[],
[],
1
)
for socket_fileno in socket_fileno_read_list:
socket_data = socket_data_by_fileno[socket_fileno]
listen_data = socket_data.get('listen_data')
downstream_data = socket_data.get('downstream_data')
downstream_protocol_data = socket_data.get('downstream_protocol_data')
upstream_data = socket_data.get('upstream_data')
if socket_data['type'] == 'listen':
# ╻ ╻┏━┓╺┳╸┏━╸┏┓╻
# ┃ ┃┗━┓ ┃ ┣╸ ┃┗┫
# ┗━╸╹┗━┛ ╹ ┗━╸╹ ╹
downstream_socket, downstream_addr = listen_data['socket'].accept()
downstream_socket.setblocking(0)
downstream_data = create_socket_data('downstream', downstream_socket)
socket_data_by_fileno[downstream_socket.fileno()] = downstream_data
elif socket_data['type'] == 'downstream':
# ╺┳┓┏━┓╻ ╻┏┓╻┏━┓╺┳╸┏━┓┏━╸┏━┓┏┳┓
# ┃┃┃ ┃┃╻┃┃┗┫┗━┓ ┃ ┣┳┛┣╸ ┣━┫┃┃┃
# ╺┻┛┗━┛┗┻┛╹ ╹┗━┛ ╹ ╹┗╸┗━╸╹ ╹╹ ╹
chunk = downstream_data['socket'].recv(RECV_SIZE)
#FIXME: MOVE TO PROTOCOL HANDLER
if not upstream_data:
upstream_socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
upstream_data = create_socket_data('upstream', upstream_socket)
upstream_data['downstream_data'] = downstream_data
downstream_data['upstream_data'] = upstream_data
socket_data_by_fileno[upstream_socket.fileno()] = upstream_data
upstream_data['socket'].connect(os.environ['SSH_AUTH_SOCK'])
upstream_socket.setblocking(0) #This has to come after connect on Cygwin.. so here it is
if not chunk:
close_socket_delete_data(downstream_data)
close_socket_delete_data(upstream_data)
else:
if not downstream_protocol_data:
downstream_protocol_data = {
'type': 'SSH_AGENT' #INNOCENT UNTIL PROVEN GUILTY
}
socket_data['downstream_protocol_data'] = downstream_protocol_data
if len(chunk) < 5:
print 'SENDING SOURCE'
downstream_protocol_data['type'] = 'SSH_MOLE'
downstream_protocol_data['request'] = SSH_MOLEC_SEND_SOURCE_FILE
else:
message_length, request_type = struct.unpack(">ib", chunk[:5])
if request_type in SSH_AGENT_REQUEST_TYPES: #REDUNDANT BUT FUN
downstream_protocol_data['type'] = 'SSH_AGENT'
if request_type in SSH_MOLE_REQUEST_TYPES:
downstream_protocol_data['type'] = 'SSH_MOLE'
if downstream_protocol_data['type'] == 'SSH_AGENT': #PASS THROUGH STREAM
upstream_data['socket'].sendall(chunk)
if downstream_protocol_data['type'] == 'SSH_MOLE':
if downstream_protocol_data['request'] == SSH_MOLEC_SEND_SOURCE_FILE:
downstream_data['socket'].sendall(open(os.path.basename(__file__)).read())
close_socket_delete_data(downstream_data)
print repr(('SSH_MOLE', chunk))
elif socket_data['type'] == 'upstream':
# ╻ ╻┏━┓┏━┓╺┳╸┏━┓┏━╸┏━┓┏┳┓
# ┃ ┃┣━┛┗━┓ ┃ ┣┳┛┣╸ ┣━┫┃┃┃
# ┗━┛╹ ┗━┛ ╹ ╹┗╸┗━╸╹ ╹╹ ╹
chunk = upstream_data['socket'].recv(RECV_SIZE)
if not chunk:
close_socket_delete_data(downstream_data)
close_socket_delete_data(upstream_data)
else:
downstream_data['socket'].sendall(chunk)
def parse_args(argv):
parser = argparse.ArgumentParser()
subparsers = parser.add_subparsers()
parser.add_argument('--version', action='version', version='%(prog)s 1.0')
parser.add_argument("-k", "--key-file", default=None)
parser.add_argument("-c", "--cert-file", default=None)
parser.add_argument("--log-level", default="DEBUG",
choices=["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"])
parser.add_argument("--log-config", default=None)
server_parser = subparsers.add_parser('server', help='start a serving daemon')
server_parser.add_argument("-l", "--listen-addr", required=True)
server_parser.add_argument("-m", "--max-connections", default=16)
server_parser.add_argument("-p", "--plugin", action='append', default=[])
server_parser.add_argument("--timeout", type=int, default=300,
help="exit if have no successfull connection in this timeout")
server_parser.add_argument("-d", "--daemon", action="store_true", help="became a daemon")
server_parser.add_argument("--stdout-file", default=None)
server_parser.add_argument("-s", "--show-settings", default=None, nargs='?', const='-',
help="dump settings dict after daemonization, not used in other cases")
server_parser.add_argument("--working-dir", default="/tmp",
help="cd to this directory after daemonization, not used in other cases")
server_parser.add_argument("--id", default="", help="Used only to find a process")
server_parser.set_defaults(subparser_name="server")
client_parser = subparsers.add_parser('call', help='send cmd to server')
client_parser.add_argument("-s", "--server-addr", required=True)
client_parser.add_argument("name")
client_parser.add_argument("params", nargs="*")
client_parser.set_defaults(subparser_name="call")
keygen_parser = subparsers.add_parser('gen_keys', help='Generate keys')
keygen_parser.add_argument("--subj",
default="/C=NN/ST=Some/L=Some/O=Ceph-monitor/OU=Ceph-monitor/CN=mirantis.com")
keygen_parser.set_defaults(subparser_name="keygen")
return parser.parse_args(argv[1:])
def main(argv):
options = parse_args(argv)
if __name__ == '__main__':
exit(main(sys.argv))