mirror of
https://github.com/jtesta/ssh-audit.git
synced 2024-12-22 09:05:10 +01:00
Multiple style fixes (protector, veryhigh).
This commit is contained in:
Andris Raugulis
parent
c759e53779
commit
fba6397721
60
ssh-audit.py
60
ssh-audit.py
@ -29,7 +29,8 @@ import os, io, sys, socket, struct, random, errno, getopt
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VERSION = 'v1.0.20160902'
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SSH_BANNER = 'SSH-2.0-OpenSSH_7.3'
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def usage(err = None):
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def usage(err=None):
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p = os.path.basename(sys.argv[0])
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out.batch = False
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out.minlevel = 'info'
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@ -45,6 +46,7 @@ def usage(err = None):
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out.sep()
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sys.exit(1)
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class Output(object):
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LEVELS = ['info', 'warn', 'fail']
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COLORS = {'head': 36, 'good': 32, 'warn': 33, 'fail': 31}
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@ -58,20 +60,24 @@ class Output(object):
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@property
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def minlevel(self):
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return self.__minlevel
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@minlevel.setter
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def minlevel(self, name):
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self.__minlevel = self.getlevel(name)
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def getlevel(self, name):
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cname = 'info' if name == 'good' else name
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if not cname in self.LEVELS:
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if cname not in self.LEVELS:
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return sys.maxsize
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return self.LEVELS.index(cname)
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def sep(self):
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if not self.batch:
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print()
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def _colorized(self, color):
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return lambda x: print(u'{0}{1}\033[0m'.format(color, x))
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def __getattr__(self, name):
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if name == 'head' and self.batch:
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return lambda x: None
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@ -83,25 +89,30 @@ class Output(object):
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else:
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return lambda x: print(u'{0}'.format(x))
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class OutputBuffer(list):
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def __enter__(self):
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self.__buf = io.StringIO()
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self.__stdout = sys.stdout
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sys.stdout = self.__buf
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return self
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def flush(self):
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for line in self:
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print(line)
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def __exit__(self, *args):
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self.extend(self.__buf.getvalue().splitlines())
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sys.stdout = self.__stdout
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class KexParty(object):
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encryption = []
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mac = []
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compression = []
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languages = []
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class Kex(object):
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cookie = None
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kex_algorithms = []
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@ -130,8 +141,9 @@ class Kex(object):
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kex.unused = buf.read_int()
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return kex
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class ReadBuf(object):
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def __init__(self, data = None):
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def __init__(self, data=None):
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super(ReadBuf, self).__init__()
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self._buf = io.BytesIO(data) if data else io.BytesIO()
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self._len = len(data) if data else 0
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@ -156,8 +168,9 @@ class ReadBuf(object):
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list_size = self.read_int()
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return self.read(list_size).decode().split(',')
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class WriteBuf(object):
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def __init__(self, data = None):
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def __init__(self, data=None):
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super(WriteBuf, self).__init__()
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self._wbuf = io.BytesIO(data) if data else io.BytesIO()
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@ -185,10 +198,11 @@ class WriteBuf(object):
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def write_mpint(self, v):
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length = v.bit_length() // 8 + 1
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data = [(v >> i*8) & 0xff for i in reversed(range(length))]
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data = [(v >> i * 8) & 0xff for i in reversed(range(length))]
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data = bytes(bytearray(data))
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self.write_string(data)
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class SSH(object):
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MSG_KEXINIT = 20
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MSG_NEWKEYS = 21
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@ -198,7 +212,7 @@ class SSH(object):
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class Socket(ReadBuf, WriteBuf):
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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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def __init__(self, host, port, cto=3.0, rto=5.0):
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self.__block_size = 8
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self.__state = 0
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self.__header = []
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@ -231,7 +245,7 @@ class SSH(object):
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self.__header.append(line)
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return self.__banner, self.__header
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def recv(self, size = 2048):
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def recv(self, size=2048):
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try:
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data = self.__sock.recv(size)
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except socket.timeout as e:
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@ -257,7 +271,7 @@ class SSH(object):
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return (-1, e)
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self.__sock.send(data)
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def send_banner(self, banner = SSH_BANNER):
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def send_banner(self, banner=SSH_BANNER):
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self.send(banner.encode() + b'\r\n')
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if self.__state < self.SM_BANNER_SENT:
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self.__state = self.SM_BANNER_SENT
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@ -314,6 +328,7 @@ class SSH(object):
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except:
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pass
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class KexDH(object):
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def __init__(self, alg, g, p):
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self.__alg = alg
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@ -330,6 +345,7 @@ class KexDH(object):
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s.write_mpint(self.__e)
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s.send_packet()
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class KexGroup1(KexDH):
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def __init__(self):
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# rfc2409: second oakley group
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@ -340,6 +356,7 @@ class KexGroup1(KexDH):
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'ffffffffffffffff', 16)
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super(KexGroup1, self).__init__('sha1', 2, p)
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class KexGroup14(KexDH):
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def __init__(self):
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# rfc3526: 2048-bit modp group
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@ -354,12 +371,14 @@ class KexGroup14(KexDH):
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'15728e5a8aacaa68ffffffffffffffff', 16)
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super(KexGroup14, self).__init__('sha1', 2, p)
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def get_ssh_version(version_desc):
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if version_desc.startswith('d'):
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return ('Dropbear SSH', version_desc[1:])
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else:
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return ('OpenSSH', version_desc)
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def get_alg_since_text(alg_desc):
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tv = []
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versions = alg_desc[0]
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@ -368,7 +387,8 @@ def get_alg_since_text(alg_desc):
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tv.append('{0} {1}'.format(ssh_prefix, ssh_version))
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return 'available since ' + ', '.join(tv).rstrip(', ')
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def get_alg_timeframe(alg_desc, result = {}):
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def get_alg_timeframe(alg_desc, result={}):
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versions = alg_desc[0]
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vlen = len(versions)
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for i in range(3):
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@ -383,7 +403,7 @@ def get_alg_timeframe(alg_desc, result = {}):
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continue
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for v in cversions.split(','):
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ssh_prefix, ssh_version = get_ssh_version(v)
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if not ssh_prefix in result:
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if ssh_prefix not in result:
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result[ssh_prefix] = [None, None, None]
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prev, push = result[ssh_prefix][i], False
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if prev is None:
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@ -396,9 +416,10 @@ def get_alg_timeframe(alg_desc, result = {}):
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result[ssh_prefix][i] = ssh_version
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return result
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def get_ssh_timeframe(kex):
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alg_timeframe = {}
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algs = {'kex': kex.kex_algorithms,
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algs = {'kex': kex.kex_algorithms,
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'key': kex.key_algorithms,
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'enc': kex.server.encryption,
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'mac': kex.server.mac}
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@ -459,7 +480,7 @@ KEX_DB = {
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'ecdsa-sha2-nistp384': [['5.7,d2013.62'], [TEXT_CURVES_WEAK], [TEXT_RNDSIG_KEY]],
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'ecdsa-sha2-nistp521': [['5.7,d2013.62'], [TEXT_CURVES_WEAK], [TEXT_RNDSIG_KEY]],
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'ssh-rsa-cert-v00@openssh.com': [['5.4', '6.9'], [FAIL_OPENSSH70_LEGACY], []],
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'ssh-dss-cert-v00@openssh.com': [['5.4', '6.9'], [FAIL_OPENSSH70_LEGACY], [TEXT_MODULUS_SIZE, TEXT_RNDSIG_KEY]],
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'ssh-dss-cert-v00@openssh.com': [['5.4', '6.9'], [FAIL_OPENSSH70_LEGACY], [TEXT_MODULUS_SIZE, TEXT_RNDSIG_KEY]],
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'ssh-rsa-cert-v01@openssh.com': [['5.6']],
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'ssh-dss-cert-v01@openssh.com': [['5.6', '6.9'], [FAIL_OPENSSH70_WEAK], [TEXT_MODULUS_SIZE, TEXT_RNDSIG_KEY]],
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'ecdsa-sha2-nistp256-cert-v01@openssh.com': [['5.7'], [TEXT_CURVES_WEAK], [TEXT_RNDSIG_KEY]],
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@ -470,7 +491,7 @@ KEX_DB = {
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'none': [['1.2.2,d2013.56'], [FAIL_PLAINTEXT]],
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'3des-cbc': [['1.2.2,d0.28', '6.6', None], [FAIL_OPENSSH67_UNSAFE], [TEXT_CIPHER_WEAK, TEXT_CIPHER_MODE, TEXT_BLOCK_SIZE]],
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'3des-ctr': [['d0.52']],
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'blowfish-cbc': [['1.2.2,d0.28', '6.6,d0.52', '7.1,d0.52'], [FAIL_OPENSSH67_UNSAFE, FAIL_DBEAR53_DISABLED], [WARN_OPENSSH72_LEGACY, TEXT_CIPHER_MODE, TEXT_BLOCK_SIZE]],
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'blowfish-cbc': [['1.2.2,d0.28', '6.6,d0.52', '7.1,d0.52'], [FAIL_OPENSSH67_UNSAFE, FAIL_DBEAR53_DISABLED], [WARN_OPENSSH72_LEGACY, TEXT_CIPHER_MODE, TEXT_BLOCK_SIZE]],
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'twofish-cbc': [['d0.28', 'd2014.66'], [FAIL_DBEAR67_DISABLED], [TEXT_CIPHER_MODE]],
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'twofish128-cbc': [['d0.47', 'd2014.66'], [FAIL_DBEAR67_DISABLED], [TEXT_CIPHER_MODE]],
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'twofish256-cbc': [['d0.47', 'd2014.66'], [FAIL_DBEAR67_DISABLED], [TEXT_CIPHER_MODE]],
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@ -520,6 +541,7 @@ KEX_DB = {
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}
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}
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def output_algorithms(title, alg_type, algorithms, maxlen=0):
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with OutputBuffer() as obuf:
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for algorithm in algorithms:
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@ -529,6 +551,7 @@ def output_algorithms(title, alg_type, algorithms, maxlen=0):
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obuf.flush()
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out.sep()
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def output_algorithm(alg_type, alg_name, alg_max_len=0):
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prefix = '(' + alg_type + ') '
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if alg_max_len == 0:
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@ -543,7 +566,7 @@ def output_algorithm(alg_type, alg_name, alg_max_len=0):
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texts.append((level, get_alg_since_text(alg_desc)))
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idx = idx + 1
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if ldesc > idx:
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for t in alg_desc[idx]:
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for t in alg_desc[idx]:
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texts.append((level, t))
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if len(texts) == 0:
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texts.append(('info', ''))
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@ -556,7 +579,7 @@ def output_algorithm(alg_type, alg_name, alg_max_len=0):
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if first:
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if first and level == 'info':
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f = out.good
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f(prefix + alg_name + padding +' -- ' + text)
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f(prefix + alg_name + padding + ' -- ' + text)
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first = False
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else:
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if out.verbose:
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@ -564,6 +587,7 @@ def output_algorithm(alg_type, alg_name, alg_max_len=0):
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else:
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f(' ' * len(prefix + alg_name) + padding + ' `- ' + text)
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def output_compatibility(kex, client=False):
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ssh_timeframe = get_ssh_timeframe(kex)
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cp = 2 if client else 1
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@ -582,6 +606,7 @@ def output_compatibility(kex, client=False):
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if len(comp_text) > 0:
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out.good('(gen) compatibility: ' + ', '.join(comp_text))
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def output(banner, header, kex):
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with OutputBuffer() as obuf:
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if len(header) > 0:
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@ -625,6 +650,7 @@ def parse_int(v):
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except:
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return 0
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def parse_args():
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host, port = None, 22
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try:
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@ -642,7 +668,7 @@ def parse_args():
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elif o in ('-n', '--no-colors'):
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out.colors = False
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elif o in ('-v', '--verbose'):
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out.verbose = True
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out.verbose = True
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elif o in ('-l', '--level'):
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if a not in ('info', 'warn', 'fail'):
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usage('level ' + a + ' is not valid')
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@ -657,6 +683,7 @@ def parse_args():
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usage('port {0} is not valid'.format(port))
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return host, port
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def main():
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host, port = parse_args()
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s = SSH.Socket(host, port)
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@ -678,6 +705,7 @@ def main():
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kex = Kex.parse(payload)
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output(banner, header, kex)
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if __name__ == '__main__':
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out = Output()
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main()
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