optools/mumble/gencerthash.py

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#!/usr/bin/env python3
# TODO: can we use struct instead for blobParser?
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import argparse
import getpass
import hashlib
import re
import sys
import os
from collections import defaultdict
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try:
import OpenSSL # "python-pyopenssl" package on Arch
except ImportError:
exit('You need to install PyOpenSSL ("pip3 install --user PyOpenSSL" if pip3 is installed)')
## DEFINE SOME PRETTY STUFF ##
class color(object):
# Windows doesn't support ANSI color escapes like sh does.
if sys.platform == 'win32':
# Gorram it, Windows.
# https://bugs.python.org/issue29059
# https://bugs.python.org/issue30075
# https://github.com/Microsoft/WSL/issues/1173
import subprocess
subprocess.call('', shell=True)
PURPLE = '\033[95m'
CYAN = '\033[96m'
DARKCYAN = '\033[36m'
BLUE = '\033[94m'
GREEN = '\033[92m'
YELLOW = '\033[93m'
RED = '\033[91m'
BOLD = '\033[1m'
UNDERLINE = '\033[4m'
END = '\033[0m'
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class Hasher(object):
def __init__(self, args):
self.args = args
self.blobGetter(self.args['cert'])
self.blobParser()
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def getPass(self):
# Do we need to get the passphrase?
if self.args['passphrase']:
if self.args['passphrase'] == 'stdin':
self.args['passphrase'] = sys.stdin.read().replace('\n', '')
elif self.args['passphrase'] == 'prompt':
_colorargs = (color.BOLD, color.RED, self.args['cert'], color.END)
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_repeat = True
while _repeat == True:
_pass_in = getpass.getpass(('\n{0}What is the encryption password ' +
'for {1}{2}{0}{3}{0} ?{3} ').format(*_colorargs))
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if not _pass_in or _pass_in == '':
print(('\n{0}Invalid passphrase for {1}{2}{0}{3}{0} ; ' +
'please enter a valid passphrase!{3} ').format(*_colorargs))
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else:
_repeat = False
self.args['passphrase'] = _pass_in.replace('\n', '')
print()
else:
self.args['passphrase'] = None
return()
def importCert(self):
self.getPass()
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# Try loading the certificate
try:
self.pkcs = OpenSSL.crypto.load_pkcs12(self.cert, self.args['passphrase'])
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except OpenSSL.crypto.Error:
exit('Could not load certificate! (Wrong passphrase? Wrong file?)')
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return()
def hashCert(self):
self.crt_in = self.pkcs.get_certificate()
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self.der = OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_ASN1,
self.crt_in)
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self.hash = hashlib.sha1(self.der).hexdigest().lower()
return(self.hash)
def blobGetter(self, blobpath):
self.cert = None
self.blob = None
_blst = blobpath.split(':')
if len(_blst) == 2:
blob = _blst[1]
self.certtype = _blst[0].lower()
elif len(_blst) == 1:
blob = _blst[0]
self.certtype = 'file'
else:
raise ValueError('{0} is not a supported path'.format(blobpath))
self.certtype = None
if self.certtype:
_hexblob = None
if self.certtype in ('plist', 'ini', 'file'):
blob = os.path.abspath(os.path.expanduser(blob))
if not os.path.isfile(blob):
raise FileNotFoundError('{0} does not exist'.format(blob))
if self.certtype == 'reg': # Only supported on Windows machines, obviously.
if sys.platform == 'win32':
import winreg
elif sys.platform == 'cygwin':
# https://bitbucket.org/sfllaw/cygwinreg/issues/5/support-python3
exit(('Python 3 under Cygwin does not support reading the registry. ' +
'Please use native-Windows Python 3 (for now) or ' +
'specify an actual PKCS #12 certificate file.'))
#try:
# import cygwinreg as winreg
#except ImportError:
# exit('You must install the cygwinreg python module in your cygwin environment to read the registry.')
_keypath = blob.split('\\')
_hkey = getattr(winreg, _keypath[0])
_skeypath = _keypath[1:-1]
_ckey = _keypath[-1]
_r = winreg.OpenKey(_hkey, '\\'.join(_skeypath))
_hexblob, _ = winreg.QueryValueEx(_r, _ckey)
winreg.CloseKey(_r)
elif self.certtype == 'plist': # plistlib, however, is thankfully cross-platform.
import plistlib
with open(blob, 'rb') as f:
_pdata = plistlib.loads(f.read())
_hexblob = _pdata['net.certificate']
elif self.certtype == 'ini':
import configparser
_parser = configparser.RawConfigParser()
_parser.read(blob)
_cfg = defaultdict(dict)
for s in _parser.sections():
_cfg[s] = {}
for k in _parser.options(s):
_cfg[s][k] = _parser.get(s, k)
self.blob = _cfg['net']['certificate']
else: # It's (supposedly) a PKCS #12 file - obviously, cross-platform.
with open(blob, 'rb') as f:
self.cert = f.read()
return()
def blobParser(self):
if not self.blob:
return()
if self.blob == '':
raise ValueError('We could not find an embedded certificate.')
# A pox upon the house of Mumble for not using base64. A POX, I SAY.
# So instead we need to straight up de-byte-array the mess.
# The below is an eldritch horror, bound to twist the mind of any sane man
# into the depths of madness.
# I probably might have been able to use a struct here, but meh.
blob = re.sub('^"?@ByteArray\(0(.*)\)"?$',
'\g<1>',
self.blob,
re.MULTILINE, re.DOTALL)
_bytes = b'0'
for s in blob.split('\\x'):
if s == '':
continue
_chunk = list(s)
# Skip the first two chars for string interpolation - they're hex.
_start = 2
try:
_hex = ''.join(_chunk[0:2])
_bytes += bytes.fromhex(_hex)
except ValueError:
# We need to zero-pad, and alter the starting index
# because yep, you guessed it - their bytearray hex vals
# (in plaintext) aren't zero-padded, either.
_hex = ''.join(_chunk[0]).zfill(2)
_bytes += bytes.fromhex(_hex)
_start = 1
# And then append the rest as-is. "Mostly."
# Namely, we need to change the single-digit null byte notation
# to actual python null bytes, and then de-escape the escapes.
# (i.e. '\t' => ' ')
_str = re.sub('\\\\0([^0])',
'\00\g<1>',
''.join(_chunk[_start:])).encode('utf-8').decode('unicode_escape')
_bytes += _str.encode('utf-8')
self.cert = _bytes
return()
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def parseArgs():
# Set the default cert path
_certpath = '~/Documents/MumbleAutomaticCertificateBackup.p12'
# This catches ALL versions of macOS/OS X.
if sys.platform == 'darwin':
_cfgpath = 'PLIST:~/Library/Preferences/net.sourceforge.mumble.Mumble.plist'
# ALL versions of windows, even Win10, on x86. Even 64-bit. I know.
# And Cygwin, which currently doesn't even suppport registry reading (see blobGetter()).
elif sys.platform in ('win32', 'cygwin'):
_cfgpath = r'REG:HKEY_CURRENT_USER\Software\Mumble\Mumble\net\certificate'
elif (sys.platform == 'linux') or (re.match('.*bsd.*', sys.platform)): # duh
_cfgpath = 'INI:~/.config/Mumble/Mumble.conf'
else:
# WHO KNOWS what we're running on
_cfgpath = None
if not os.path.isfile(os.path.abspath(os.path.expanduser(_certpath))):
_defcrt = _cfgpath
else:
_defcrt = 'FILE:{0}'.format(_certpath)
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args = argparse.ArgumentParser()
args.add_argument('-p',
'--passphrase',
choices = ['stdin', 'prompt'],
dest = 'passphrase',
default = None,
help = ('The default is to behave as if your certificate does not have ' +
'a passphrase attached (as this is Mumble\'s default); however, ' +
'if you specify \'stdin\' we will expect the passphrase to be given as a stdin pipe, ' +
'if you specify \'prompt\', we will prompt you for a passphrase (it will not be echoed back' +
'to the console)'))
args.add_argument('-c', '--cert',
dest = 'cert',
default = _defcrt,
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metavar = 'path/to/mumblecert.p12',
help = ('The path to your exported PKCS #12 Mumble certificate. ' +
'Special prefixes are ' +
'{0} (it is a PKCS #12 file, default), ' +
'{1} (it is embedded in a macOS/OS X PLIST file), ' +
'{2} (it is a Mumble.conf with embedded PKCS#12), or ' +
'{3} (it is a path to a Windows registry object). ' +
'Default: {4}').format('{0}FILE{1}'.format(color.BOLD, color.END),
'{0}PLIST{1}'.format(color.BOLD, color.END),
'{0}INI{1}'.format(color.BOLD, color.END),
'{0}REG{1}'.format(color.BOLD, color.END),
'{0}{1}{2}'.format(color.BOLD, _defcrt, color.END)))
# this ^ currently prints "0m" at the end of the help message,
# all the way on the left on Windows.
# Why? Who knows; Microsoft is a mystery even to themselves.
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return(args)
def main():
args = vars(parseArgs().parse_args())
cert = Hasher(args)
cert.importCert()
h = cert.hashCert()
print(('\n\t{0}Your certificate\'s public hash is: ' +
'{1}{2}{3}\n\n\t{0}Please provide this to the Mumble server administrator ' +
'that has requested it.{3}').format(color.BOLD, color.BLUE, h, color.END))
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if __name__ == '__main__':
main()