mirror of
https://github.com/jtesta/ssh-audit.git
synced 2024-11-16 13:35:39 +01:00
Implement new options (-4/--ipv4, -6/--ipv6, -p/--port <port>).
By default both IPv4 and IPv6 is supported and order of precedence depends on OS. By using -46, IPv4 is prefered, but by using -64, IPv6 is preferd. For now the old way how to specify port (host:port) has been kept intact.
This commit is contained in:
Andris Raugulis
parent
8018209dd1
commit
66b9e079a8
165
ssh-audit.py
165
ssh-audit.py
@ -28,21 +28,22 @@ import os, io, sys, socket, struct, random, errno, getopt, re, hashlib, base64
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VERSION = 'v1.6.1.dev'
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if sys.version_info >= (3,):
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if sys.version_info >= (3,): # pragma: nocover
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StringIO, BytesIO = io.StringIO, io.BytesIO
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text_type = str
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binary_type = bytes
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else:
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else: # pragma: nocover
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import StringIO as _StringIO # pylint: disable=import-error
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StringIO = BytesIO = _StringIO.StringIO
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text_type = unicode # pylint: disable=undefined-variable
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binary_type = str
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try:
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try: # pragma: nocover
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# pylint: disable=unused-import
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from typing import List, Tuple, Optional, Callable, Union, Any
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from typing import List, Set, Sequence, Tuple, Iterable
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from typing import Callable, Optional, Union, Any
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except ImportError: # pragma: nocover
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pass
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try:
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try: # pragma: nocover
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from colorama import init as colorama_init
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colorama_init() # pragma: nocover
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except ImportError: # pragma: nocover
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@ -53,13 +54,16 @@ def usage(err=None):
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# type: (Optional[str]) -> None
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uout = Output()
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p = os.path.basename(sys.argv[0])
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uout.head('# {0} {1}, moo@arthepsy.eu'.format(p, VERSION))
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uout.head('# {0} {1}, moo@arthepsy.eu\n'.format(p, VERSION))
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if err is not None:
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uout.fail('\n' + err)
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uout.info('\nusage: {0} [-12bnv] [-l <level>] <host[:port]>\n'.format(p))
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uout.info('usage: {0} [-1246pbnvl] <host>\n'.format(p))
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uout.info(' -h, --help print this help')
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uout.info(' -1, --ssh1 force ssh version 1 only')
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uout.info(' -2, --ssh2 force ssh version 2 only')
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uout.info(' -4, --ipv4 enable IPv4 (order of precedence)')
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uout.info(' -6, --ipv6 enable IPv6 (order of precedence)')
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uout.info(' -p, --port=<port> port to connect')
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uout.info(' -b, --batch batch output')
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uout.info(' -n, --no-colors disable colors')
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uout.info(' -v, --verbose verbose output')
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@ -69,6 +73,7 @@ def usage(err=None):
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class AuditConf(object):
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# pylint: disable=too-many-instance-attributes
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def __init__(self, host=None, port=22):
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# type: (Optional[str], int) -> None
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self.host = host
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@ -79,12 +84,35 @@ class AuditConf(object):
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self.colors = True
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self.verbose = False
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self.minlevel = 'info'
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self.ipvo = () # type: Sequence[int]
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self.ipv4 = False
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self.ipv6 = False
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def __setattr__(self, name, value):
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# type: (str, Union[str, int, bool]) -> None
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# type: (str, Union[str, int, bool, Sequence[int]]) -> None
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valid = False
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if name in ['ssh1', 'ssh2', 'batch', 'colors', 'verbose']:
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valid, value = True, True if value else False
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elif name in ['ipv4', 'ipv6']:
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valid = False
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value = True if value else False
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ipv = 4 if name == 'ipv4' else 6
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if value:
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value = tuple(list(self.ipvo) + [ipv])
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else:
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if len(self.ipvo) == 0:
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value = (6,) if ipv == 4 else (4,)
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else:
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value = tuple(filter(lambda x: x != ipv, self.ipvo))
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self.__setattr__('ipvo', value)
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elif name == 'ipvo':
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if isinstance(value, (tuple, list)):
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uniq_value = utils.unique_seq(value)
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value = tuple(filter(lambda x: x in (4, 6), uniq_value))
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valid = True
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ipv_both = len(value) == 0
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object.__setattr__(self, 'ipv4', ipv_both or 4 in value)
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object.__setattr__(self, 'ipv6', ipv_both or 6 in value)
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elif name == 'port':
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valid, port = True, utils.parse_int(value)
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if port < 1 or port > 65535:
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@ -105,13 +133,14 @@ class AuditConf(object):
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# pylint: disable=too-many-branches
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aconf = cls()
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try:
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sopts = 'h12bnvl:'
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lopts = ['help', 'ssh1', 'ssh2', 'batch',
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'no-colors', 'verbose', 'level=']
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sopts = 'h1246p:bnvl:'
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lopts = ['help', 'ssh1', 'ssh2', 'ipv4', 'ipv6', 'port',
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'batch', 'no-colors', 'verbose', 'level=']
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opts, args = getopt.getopt(args, sopts, lopts)
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except getopt.GetoptError as err:
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usage_cb(str(err))
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aconf.ssh1, aconf.ssh2 = False, False
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oport = None
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for o, a in opts:
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if o in ('-h', '--help'):
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usage_cb()
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@ -119,6 +148,12 @@ class AuditConf(object):
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aconf.ssh1 = True
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elif o in ('-2', '--ssh2'):
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aconf.ssh2 = True
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elif o in ('-4', '--ipv4'):
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aconf.ipv4 = True
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elif o in ('-6', '--ipv6'):
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aconf.ipv6 = True
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elif o in ('-p', '--port'):
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oport = a
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elif o in ('-b', '--batch'):
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aconf.batch = True
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aconf.verbose = True
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@ -132,14 +167,20 @@ class AuditConf(object):
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aconf.minlevel = a
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if len(args) == 0:
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usage_cb()
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s = args[0].split(':')
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host, port = s[0].strip(), 22
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if len(s) > 1:
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port = utils.parse_int(s[1])
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if oport is not None:
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host = args[0]
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port = utils.parse_int(oport)
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else:
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s = args[0].split(':')
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host = s[0].strip()
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if len(s) == 2:
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oport, port = s[1], utils.parse_int(s[1])
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else:
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oport, port = '22', 22
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if not host:
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usage_cb('host is empty')
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if port <= 0 or port > 65535:
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usage_cb('port {0} is not valid'.format(s[1]))
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usage_cb('port {0} is not valid'.format(oport))
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aconf.host = host
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aconf.port = port
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if not (aconf.ssh1 or aconf.ssh2):
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@ -1038,24 +1079,67 @@ class SSH(object): # pylint: disable=too-few-public-methods
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SM_BANNER_SENT = 1
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def __init__(self, host, port, cto=3.0, rto=5.0):
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# type: (str, int, float, float) -> None
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def __init__(self, host, port):
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# type: (str, int) -> None
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super(SSH.Socket, self).__init__()
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self.__block_size = 8
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self.__state = 0
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self.__header = [] # type: List[text_type]
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self.__banner = None # type: Optional[SSH.Banner]
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super(SSH.Socket, self).__init__()
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try:
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self.__sock = socket.create_connection((host, port), cto)
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self.__sock.settimeout(rto)
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except Exception as e: # pylint: disable=broad-except
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out.fail('[fail] {0}'.format(e))
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sys.exit(1)
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self.__host = host
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self.__port = port
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self.__sock = None # type: socket.socket
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def __enter__(self):
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# type: () -> SSH.Socket
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return self
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def _resolve(self, ipvo):
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# type: (Sequence[int]) -> Iterable[Tuple[int, Tuple[Any, ...]]]
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ipvo = tuple(filter(lambda x: x in (4, 6), utils.unique_seq(ipvo)))
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ipvo_len = len(ipvo)
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prefer_ipvo = ipvo_len > 0
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prefer_ipv4 = prefer_ipvo and ipvo[0] == 4
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if len(ipvo) == 1:
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family = {4: socket.AF_INET, 6: socket.AF_INET6}.get(ipvo[0])
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else:
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family = socket.AF_UNSPEC
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try:
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stype = socket.SOCK_STREAM
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r = socket.getaddrinfo(self.__host, self.__port, family, stype)
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if prefer_ipvo:
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r = sorted(r, key=lambda x: x[0], reverse=not prefer_ipv4)
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check = any(stype == rline[2] for rline in r)
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for (af, socktype, proto, canonname, addr) in r:
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if not check or socktype == socket.SOCK_STREAM:
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yield (af, addr)
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except socket.error as e:
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out.fail('[exception] {0}'.format(e))
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sys.exit(1)
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def connect(self, ipvo=(), cto=3.0, rto=5.0):
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# type: (Sequence[int], float, float) -> None
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err = None
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for (af, addr) in self._resolve(ipvo):
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s = None
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try:
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s = socket.socket(af, socket.SOCK_STREAM)
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s.settimeout(cto)
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s.connect(addr)
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s.settimeout(rto)
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self.__sock = s
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return
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except socket.error as e:
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err = e
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self._close_socket(s)
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if err is None:
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errm = 'host {0} has no DNS records'.format(self.__host)
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else:
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errt = (self.__host, self.__port, err)
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errm = 'cannot connect to {0} port {1}: {2}'.format(*errt)
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out.fail('[exception] {0}'.format(errm))
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sys.exit(1)
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def get_banner(self, sshv=2):
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# type: (int) -> Tuple[Optional[SSH.Banner], List[text_type]]
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banner = 'SSH-{0}-OpenSSH_7.3'.format('1.5' if sshv == 1 else '2.0')
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@ -1188,6 +1272,15 @@ class SSH(object): # pylint: disable=too-few-public-methods
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data = struct.pack('>Ib', plen, padding) + payload + pad_bytes
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return self.send(data)
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def _close_socket(self, s):
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# type: (Optional[socket.socket]) -> None
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try:
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if s is not None:
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s.shutdown(socket.SHUT_RDWR)
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s.close()
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except: # pylint: disable=bare-except
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pass
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def __del__(self):
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# type: () -> None
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self.__cleanup()
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@ -1198,11 +1291,7 @@ class SSH(object): # pylint: disable=too-few-public-methods
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def __cleanup(self):
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# type: () -> None
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try:
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self.__sock.shutdown(socket.SHUT_RDWR)
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self.__sock.close()
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except: # pylint: disable=bare-except
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pass
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self._close_socket(self.__sock)
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class KexDH(object):
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@ -1847,6 +1936,21 @@ class Utils(object):
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return cls.to_ntext(v.encode('ascii', errors))
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raise cls._type_err(v, 'ascii')
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@classmethod
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def unique_seq(cls, seq):
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# type: (Sequence[Any]) -> Sequence[Any]
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seen = set() # type: Set[Any]
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def _seen_add(x):
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# type: (Any) -> bool
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seen.add(x)
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return False
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if isinstance(seq, tuple):
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return tuple(x for x in seq if x not in seen and not _seen_add(x))
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else:
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return [x for x in seq if x not in seen and not _seen_add(x)]
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@staticmethod
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def parse_int(v):
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# type: (Any) -> int
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@ -1863,6 +1967,7 @@ def audit(aconf, sshv=None):
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out.verbose = aconf.verbose
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out.minlevel = aconf.minlevel
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s = SSH.Socket(aconf.host, aconf.port)
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s.connect(aconf.ipvo)
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if sshv is None:
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sshv = 2 if aconf.ssh2 else 1
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err = None
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@ -1,10 +1,14 @@
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import pytest, os, sys, io, socket
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import os
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import io
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import sys
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import socket
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import pytest
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if sys.version_info[0] == 2:
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import StringIO
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import StringIO # pylint: disable=import-error
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StringIO = StringIO.StringIO
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else:
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StringIO = io.StringIO
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@ -17,6 +21,7 @@ def ssh_audit():
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return __import__('ssh-audit')
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# pylint: disable=attribute-defined-outside-init
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class _OutputSpy(list):
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def begin(self):
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self.__out = StringIO()
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@ -50,11 +55,14 @@ class _VirtualSocket(object):
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if method_error:
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raise method_error
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def _connect(self, address):
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def connect(self, address):
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return self._connect(address, False)
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def _connect(self, address, ret=True):
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self.peer_address = address
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self._connected = True
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self._check_err('connect')
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return self
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return self if ret else None
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def settimeout(self, timeout):
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self.timeout = timeout
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@ -77,6 +85,7 @@ class _VirtualSocket(object):
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pass
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def accept(self):
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# pylint: disable=protected-access
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conn = _VirtualSocket()
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conn.sock_address = self.sock_address
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conn.peer_address = ('127.0.0.1', 0)
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@ -84,6 +93,7 @@ class _VirtualSocket(object):
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return conn, conn.peer_address
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def recv(self, bufsize, flags=0):
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# pylint: disable=unused-argument
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if not self._connected:
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raise socket.error(54, 'Connection reset by peer')
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if not len(self.rdata) > 0:
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@ -103,10 +113,18 @@ class _VirtualSocket(object):
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@pytest.fixture()
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def virtual_socket(monkeypatch):
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vsocket = _VirtualSocket()
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def _c(address):
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return vsocket._connect(address)
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# pylint: disable=unused-argument
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def _socket(family=socket.AF_INET,
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socktype=socket.SOCK_STREAM,
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proto=0,
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fileno=None):
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return vsocket
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def _cc(address, timeout=0, source_address=None):
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return vsocket._connect(address)
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# pylint: disable=protected-access
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return vsocket._connect(address, True)
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monkeypatch.setattr(socket, 'create_connection', _cc)
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monkeypatch.setattr(socket.socket, 'connect', _c)
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monkeypatch.setattr(socket, 'socket', _socket)
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return vsocket
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@ -20,7 +20,10 @@ class TestAuditConf(object):
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'batch': False,
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'colors': True,
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'verbose': False,
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'minlevel': 'info'
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'minlevel': 'info',
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'ipv4': True,
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'ipv6': True,
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'ipvo': ()
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}
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for k, v in kwargs.items():
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options[k] = v
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@ -32,6 +35,9 @@ class TestAuditConf(object):
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assert conf.colors is options['colors']
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assert conf.verbose is options['verbose']
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assert conf.minlevel == options['minlevel']
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assert conf.ipv4 == options['ipv4']
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assert conf.ipv6 == options['ipv6']
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assert conf.ipvo == options['ipvo']
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def test_audit_conf_defaults(self):
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conf = self.AuditConf()
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@ -57,6 +63,58 @@ class TestAuditConf(object):
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conf.port = port
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excinfo.match(r'.*invalid port.*')
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def test_audit_conf_ipvo(self):
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# ipv4-only
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conf = self.AuditConf()
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conf.ipv4 = True
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assert conf.ipv4 is True
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assert conf.ipv6 is False
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assert conf.ipvo == (4,)
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# ipv6-only
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conf = self.AuditConf()
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conf.ipv6 = True
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assert conf.ipv4 is False
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assert conf.ipv6 is True
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assert conf.ipvo == (6,)
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# ipv4-only (by removing ipv6)
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conf = self.AuditConf()
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conf.ipv6 = False
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assert conf.ipv4 is True
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assert conf.ipv6 is False
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assert conf.ipvo == (4, )
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# ipv6-only (by removing ipv4)
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conf = self.AuditConf()
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conf.ipv4 = False
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assert conf.ipv4 is False
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assert conf.ipv6 is True
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assert conf.ipvo == (6, )
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# ipv4-preferred
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conf = self.AuditConf()
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conf.ipv4 = True
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conf.ipv6 = True
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assert conf.ipv4 is True
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assert conf.ipv6 is True
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assert conf.ipvo == (4, 6)
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# ipv6-preferred
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conf = self.AuditConf()
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conf.ipv6 = True
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conf.ipv4 = True
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assert conf.ipv4 is True
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assert conf.ipv6 is True
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assert conf.ipvo == (6, 4)
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# ipvo empty
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conf = self.AuditConf()
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conf.ipvo = ()
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assert conf.ipv4 is True
|
||||
assert conf.ipv6 is True
|
||||
assert conf.ipvo == ()
|
||||
# ipvo validation
|
||||
conf = self.AuditConf()
|
||||
conf.ipvo = (1, 2, 3, 4, 5, 6)
|
||||
assert conf.ipvo == (4, 6)
|
||||
conf.ipvo = (4, 4, 4, 6, 6)
|
||||
assert conf.ipvo == (4, 6)
|
||||
|
||||
def test_audit_conf_minlevel(self):
|
||||
conf = self.AuditConf()
|
||||
for level in ['info', 'warn', 'fail']:
|
||||
@ -68,6 +126,7 @@ class TestAuditConf(object):
|
||||
excinfo.match(r'.*invalid level.*')
|
||||
|
||||
def test_audit_conf_cmdline(self):
|
||||
# pylint: disable=too-many-statements
|
||||
c = lambda x: self.AuditConf.from_cmdline(x.split(), self.usage) # noqa
|
||||
with pytest.raises(SystemExit):
|
||||
conf = c('')
|
||||
@ -87,20 +146,36 @@ class TestAuditConf(object):
|
||||
self._test_conf(conf, host='github.com')
|
||||
conf = c('localhost:2222')
|
||||
self._test_conf(conf, host='localhost', port=2222)
|
||||
conf = c('-p 2222 localhost')
|
||||
self._test_conf(conf, host='localhost', port=2222)
|
||||
with pytest.raises(SystemExit):
|
||||
conf = c('localhost:')
|
||||
with pytest.raises(SystemExit):
|
||||
conf = c('localhost:abc')
|
||||
with pytest.raises(SystemExit):
|
||||
conf = c('-p abc localhost')
|
||||
with pytest.raises(SystemExit):
|
||||
conf = c('localhost:-22')
|
||||
with pytest.raises(SystemExit):
|
||||
conf = c('-p -22 localhost')
|
||||
with pytest.raises(SystemExit):
|
||||
conf = c('localhost:99999')
|
||||
with pytest.raises(SystemExit):
|
||||
conf = c('-p 99999 localhost')
|
||||
conf = c('-1 localhost')
|
||||
self._test_conf(conf, host='localhost', ssh1=True, ssh2=False)
|
||||
conf = c('-2 localhost')
|
||||
self._test_conf(conf, host='localhost', ssh1=False, ssh2=True)
|
||||
conf = c('-12 localhost')
|
||||
self._test_conf(conf, host='localhost', ssh1=True, ssh2=True)
|
||||
conf = c('-4 localhost')
|
||||
self._test_conf(conf, host='localhost', ipv4=True, ipv6=False, ipvo=(4,))
|
||||
conf = c('-6 localhost')
|
||||
self._test_conf(conf, host='localhost', ipv4=False, ipv6=True, ipvo=(6,))
|
||||
conf = c('-46 localhost')
|
||||
self._test_conf(conf, host='localhost', ipv4=True, ipv6=True, ipvo=(4, 6))
|
||||
conf = c('-64 localhost')
|
||||
self._test_conf(conf, host='localhost', ipv4=True, ipv6=True, ipvo=(6, 4))
|
||||
conf = c('-b localhost')
|
||||
self._test_conf(conf, host='localhost', batch=True, verbose=True)
|
||||
conf = c('-n localhost')
|
||||
|
||||
Loading…
Reference in New Issue
Block a user