mirror of
https://github.com/jtesta/ssh-audit.git
synced 2024-11-22 02:21:40 +01:00
Implement new features: minimum output level and batch output.
This commit is contained in:
Andris Raugulis
parent
ef8d727356
commit
5189c341f3
189
ssh-audit.py
189
ssh-audit.py
@ -24,38 +24,77 @@
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THE SOFTWARE.
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"""
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from __future__ import print_function
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import os, io, sys, socket, struct, random, errno
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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():
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def usage(err = None):
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p = os.path.basename(sys.argv[0])
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out.head('# {0} v1.0.20160812, moo@arthepsy.eu'.format(p))
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out.info('\nusage: {0} [-nv] host[:port]\n'.format(p))
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out.info(' -v verbose')
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out.info(' -n disable colors' + os.linesep)
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out.batch = False
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out.minlevel = 'info'
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out.head('# {0} {1}, moo@arthepsy.eu'.format(p, VERSION))
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if err is not None:
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out.fail('\n' + err)
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out.info('\nusage: {0} [-bnv] [-l <level>] <host[:port]>\n'.format(p))
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out.info(' -h, --help print this help')
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out.info(' -b --batch batch output')
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out.info(' -n --no-colors disable colors')
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out.info(' -v --verbose verbose output')
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out.info(' -l, --level=<level> minimum output level (info|warn|fail)')
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out.sep()
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sys.exit(1)
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class Output(object):
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colors = True
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verbose = False
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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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def __init__(self):
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self.batch = False
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self.colors = True
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self.verbose = False
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self.__minlevel = 0
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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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return sys.maxsize
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return self.LEVELS.index(cname)
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_colors = {
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'head': 36,
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'good': 32,
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'fail': 31,
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'warn': 33,
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}
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def sep(self):
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print()
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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(color + x + '\033[0m')
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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 self.colors and os.name == 'posix' and name in self._colors:
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color = '\033[0;{0}m'.format(self._colors[name])
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if name == 'head' and self.batch:
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return lambda x: None
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if not self.getlevel(name) >= self.minlevel:
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return lambda x: None
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if self.colors and os.name == 'posix' and name in self.COLORS:
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color = u'\033[0;{0}m'.format(self.COLORS[name])
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return self._colorized(color)
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else:
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return lambda x: print(x)
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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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@ -481,9 +520,14 @@ KEX_DB = {
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}
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}
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def output_algorithms(alg_type, algorithms, maxlen=0):
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for algorithm in algorithms:
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output_algorithm(alg_type, algorithm, maxlen)
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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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output_algorithm(alg_type, algorithm, maxlen)
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if len(obuf) > 0:
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out.head('# ' + title)
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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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@ -512,7 +556,7 @@ 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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@ -531,44 +575,48 @@ def output_compatibility(kex, client=False):
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comp_text.append('{0} {1}'.format(sshd_name, v[0]))
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else:
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if v[1] < v[0]:
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comp_text.append('{0} {1}+ (some functionality from {2})'.format(sshd_name, v[0], v[1]))
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tfmt = '{0} {1}+ (some functionality from {2})'
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else:
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comp_text.append('{0} {1}-{2}'.format(sshd_name, v[0], v[1]))
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tfmt = '{0} {1}-{2}'
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comp_text.append(tfmt.format(sshd_name, v[0], v[1]))
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if len(comp_text) > 0:
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out.good('[info] compatibility: ' + ', '.join(comp_text))
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out.good('(gen) compatibility: ' + ', '.join(comp_text))
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def output(banner, header, kex):
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if banner is not None or kex is not None:
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with OutputBuffer() as obuf:
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if len(header) > 0:
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out.info('(gen) header: ' + '\n'.join(header))
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if banner is not None:
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out.good('(gen) banner: ' + banner)
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if banner.startswith('SSH-1.99-'):
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out.fail('(gen) protocol SSH1 enabled')
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if kex is not None:
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output_compatibility(kex)
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compressions = [x for x in kex.server.compression if x != 'none']
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if len(compressions) > 0:
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cmptxt = 'enabled ({0})'.format(', '.join(compressions))
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else:
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cmptxt = 'disabled'
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out.good('(gen) compression is ' + cmptxt)
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if len(obuf) > 0:
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out.head('# general')
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if len(header) > 0:
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out.info('[info] header: ' + '\n'.join(header))
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if banner is not None:
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out.good('[info] banner: ' + banner)
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if banner.startswith('SSH-1.99-'):
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out.fail('[fail] protocol SSH1 enabled')
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obuf.flush()
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out.sep()
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if kex is None:
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return
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output_compatibility(kex)
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compressions = [x for x in kex.server.compression if x != 'none']
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if len(compressions) > 0:
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cmptxt = 'enabled ({0})'.format(', '.join(compressions))
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else:
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cmptxt = 'disabled'
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out.good('[info] compression is ' + cmptxt)
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ml = lambda l: max(len(i) for i in l)
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maxlen = max(ml(kex.kex_algorithms),
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ml(kex.key_algorithms),
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ml(kex.server.encryption),
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ml(kex.server.mac))
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out.head('\n# key exchange algorithms')
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output_algorithms('kex', kex.kex_algorithms, maxlen)
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out.head('\n# host-key algorithms')
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output_algorithms('key', kex.key_algorithms, maxlen)
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out.head('\n# encryption algorithms (ciphers)')
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output_algorithms('enc', kex.server.encryption, maxlen)
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out.head('\n# message authentication code algorithms')
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output_algorithms('mac', kex.server.mac, maxlen)
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out.sep()
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title, alg_type = 'key exchange algorithms', 'kex'
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output_algorithms(title, alg_type, kex.kex_algorithms, maxlen)
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title, alg_type = 'host-key algorithms', 'key'
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output_algorithms(title, alg_type, kex.key_algorithms, maxlen)
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title, alg_type = 'encryption algorithms (ciphers)', 'enc'
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output_algorithms(title, alg_type, kex.server.encryption, maxlen)
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title, alg_type = 'message authentication code algorithms', 'mac'
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output_algorithms(title, alg_type, kex.server.mac, maxlen)
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def parse_int(v):
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@ -578,20 +626,34 @@ def parse_int(v):
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return 0
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def parse_args():
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host = None
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port = 22
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for arg in sys.argv[1:]:
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if arg.startswith('-'):
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arg = arg.lstrip('-')
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if arg == 'n': out.colors = False
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elif arg == 'v': out.verbose = True
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continue
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s = arg.split(':')
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host = s[0].strip()
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if len(s) > 1:
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port = parse_int(s[1])
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if not host or port <= 0:
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host, port = None, 22
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try:
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sopts = 'hbnvl:'
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lopts = ['help', 'batch', 'no-colors', 'verbose', 'level=']
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opts, args = getopt.getopt(sys.argv[1:], sopts, lopts)
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except getopt.GetoptError as err:
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usage(str(err))
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for o, a in opts:
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if o in ('-h', '--hep'):
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usage()
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elif o in ('-b', '--batch'):
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out.batch = True
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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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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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out.minlevel = a
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if len(args) == 0:
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usage()
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s = args[0].split(':')
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host = s[0].strip()
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if len(s) > 1:
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port = parse_int(s[1])
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if not host or port <= 0:
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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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@ -606,7 +668,8 @@ def main():
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if packet_type < 0:
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err = '[exception] error reading packet ({0})'.format(payload)
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elif packet_type != SSH.MSG_KEXINIT:
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err = '[exception] did not receive MSG_KEXINIT (20), instead received unknown message ({0})'.format(packet_type)
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err = '[exception] did not receive MSG_KEXINIT (20), ' + \
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'instead received unknown message ({0})'.format(packet_type)
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if err:
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output(banner, header, None)
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out.fail(err)
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