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keyfinder.py
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keyfinder.py
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#!/usr/bin/env python3
# CERT Keyfinder
#
# Copyright 2018 Carnegie Mellon University. All Rights Reserved.
# NO WARRANTY. THIS CARNEGIE MELLON UNIVERSITY AND SOFTWARE ENGINEERING INSTITUTE MATERIAL IS FURNISHED ON AN "AS-IS"
# BASIS. CARNEGIE MELLON UNIVERSITY MAKES NO WARRANTIES OF ANY KIND, EITHER EXPRESSED OR IMPLIED, AS TO ANY MATTER
# INCLUDING, BUT NOT LIMITED TO, WARRANTY OF FITNESS FOR PURPOSE OR MERCHANTABILITY, EXCLUSIVITY, OR RESULTS OBTAINED
# FROM USE OF THE MATERIAL. CARNEGIE MELLON UNIVERSITY DOES NOT MAKE ANY WARRANTY OF ANY KIND WITH RESPECT TO FREEDOM
# FROM PATENT, TRADEMARK, OR COPYRIGHT INFRINGEMENT.
#
# Released under a MIT (SEI)-style license, please see license.txt or contact permission@sei.cmu.edu for full terms.
# [DISTRIBUTION STATEMENT A] This material has been approved for public release and unlimited distribution. Please see
# Copyright notice for non-US Government use and distribution.
#
# DM18-0850
import sys
import os
import sys
import re
if sys.version_info[0] == 2:
print('Python 3.x is recommended for best Unicode compatibility')
try:
import subprocess32 as subprocess
except ImportError:
print('subprocess32 library not found. Please install this package for proper functionality.')
else:
import subprocess
import argparse
import shutil
import json
import struct
import androapkinfo
import zipfile
import base64
from pprint import pformat
import tempfile
import logging
import binascii
import gc
try:
from urllib2 import urlopen
except ImportError:
from urllib.request import urlopen
import hashlib
try:
from OpenSSL import crypto
from OpenSSL.crypto import FILETYPE_PEM
except ImportError:
print('PyOpenSSL library not found. Key processing capabilities will be limited.')
try:
import magic
except ImportError:
print('magic library not found. Please install this package for proper functionality.')
b4 = struct.Struct('>L') # unsigned
logger = logging.getLogger()
FNULL = open(os.devnull, 'w')
# Simple regex to detect base64 data
b64re = re.compile('^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$')
def get_magic(filename):
magictype = None
try:
# filemagic
with magic.Magic() as m:
try:
magictype = m.id_filename(filename)
except magic.api.MagicError:
logger.debug('Error determining magic of file: %s' % filename)
except AttributeError:
# python-magic
try:
magictype = magic.from_file(filename)
except:
logger.debug('Error determining magic of file: %s' % filename)
return magictype
def getasn(keydata):
logger.debug('getting ASN1...')
parsed = None
isasn1 = False
tmpkey = tempfile.NamedTemporaryFile(suffix='.key').name
if keydata:
try:
# Might be a string
keydata = keydata.encode()
except AttributeError:
# Already bytes
pass
except UnicodeDecodeError:
try:
keydata = keydata.decode('utf-8').encode('utf-8')
except:
pass
with open(tmpkey, 'wb') as wp:
wp.write(keydata)
try:
parsed = subprocess.check_output(
['openssl', 'asn1parse', '-inform', 'der', '-in', tmpkey], stderr=FNULL).decode('utf-8',
'backslashreplace')
os.unlink(tmpkey)
for line in parsed.splitlines():
if 'prim: ' in line and 'prim: EOC' not in line and ':BAD' not in line:
# Should be ASN1 data
if not isasn1:
logger.debug('"%s" Looks like legit ASN1 data' % line)
isasn1 = True
except subprocess.CalledProcessError:
os.unlink(tmpkey)
if not isasn1:
parsed = None
return parsed
def validasn(keyfile):
try:
parsed = subprocess.check_output(
['openssl', 'asn1parse', '-inform', 'der', '-in', keyfile], stderr=FNULL).decode('utf-8',
'backslashreplace')
if 'prim: OBJECT' in parsed:
# logger.debug(parsed)
return True
else:
return False
except subprocess.CalledProcessError:
return False
def is_b64(data):
# logger.debug('Checking if %s is b64' % type(data))
# logger.debug(data)
if len(data) > 1:
try:
data = data.decode('utf-8', 'backslashreplace').replace('\n', '').replace('\r', '')
except TypeError:
logger.debug('UTF-8 decode error')
pass
# logger.debug('"%s"' % data)
m = re.match(b64re, data)
if m:
logger.debug('It is base64!')
return True
else:
logger.debug('It is not base64.')
return False
else:
logger.debug('Zero-length file!')
return False
def decode_b64(keyfile, keydata):
if is_b64(keydata):
try:
decoded_keydata = base64.b64decode(keydata)
# logger.debug('%s IS base64!' % keyfile)
# logger.debug(decoded_keydata)
return True, decoded_keydata
except binascii.Error:
logger.debug('%s is surprisingly NOT base64!' % keyfile)
return False, keydata
else:
# logger.debug('%s is NOT base64!' % keyfile)
return False, keydata
def output_reader(proc, outq):
# Thread worker for reading subprocess stdout
for line in iter(proc.stdout.readline, b''):
outq.put(line.decode('utf-8', 'backslashreplace'))
def changejkspassword(jksfilepath):
jksoutfile = None
logger.debug('Changing the password for %s' % jksfilepath)
if os.path.exists(jksfilepath):
jksoutfile = tempfile.NamedTemporaryFile(suffix='.jks').name
if not os.path.exists(jksoutfile):
try:
subprocess.check_call(['java', 'ChangePassword', jksfilepath, jksoutfile], stdout=FNULL, stderr=FNULL)
logger.debug('Password changed!')
except subprocess.CalledProcessError:
logger.debug('Error changing password of %s' % jksfilepath)
jksoutfile = None
return jksoutfile
def parsekeystorecontents(keystorecontents):
keydict = {}
if keystorecontents:
# logger.debug('Parsing %s' % bkscontents)
try:
keystorecontents = keystorecontents.decode('utf-8', 'backslashreplace')
except TypeError:
# Python 2.7
pass
keydict['type'] = ''
currententry = None
keydict['keystoretext'] = keystorecontents
if 'Entry type: PrivateKeyEntry' in keystorecontents or 'Entry type: SecretKeyEntry' in keystorecontents:
keydict['private'] = True
keydict['iskey'] = True
if 'Entry type: trustedCertEntry' in keystorecontents:
keydict['iscert'] = True
for line in keystorecontents.splitlines():
line = line.rstrip()
# logger.debug('"%s"' % line)
if 'Entry type: PrivateKeyEntry' in line or 'Entry type: SecretKeyEntry' in line:
# logger.debug('*** We have a key! ***')
currententry = 'key'
elif 'Entry type: trustedCertEntry' in line:
# logger.debug('*** We have a cert! ***')
currententry = 'cert'
if line == '*******************************************':
# logger.debug('*** We are between entries! ***')
currententry = None
if currententry == 'key':
if '\t SHA256: ' in line and 'certhash' not in keydict:
# We have a certificate hash for a private key
# BKS includes entire cert chain, so stop at first one.
# logger.debug('*** We have a key certificate hash! ***')
sha256 = line.replace('\t SHA256: ', '').replace(':', '').lower()
keydict['certhash'] = sha256
foundcrt, url = checkcrt(sha256)
if foundcrt:
logger.info('-=-= This key is in CRT.SH! =-=-')
keydict['crt'] = url
return keydict
def getbksversion(bksfilepath):
logger.debug('Checking bksfilepath: "%s"' % bksfilepath)
version = 'UNKNOWN'
if os.path.exists(bksfilepath):
with open(bksfilepath, 'rb') as f:
binver = f.read(4)
# logger.debug(binver)
if len(binver) == 4:
version = b4.unpack(binver)[0]
return version
def get_keyhash(keyfile, encoding='pem', pw=''):
if pw is None:
# Revert back to empty string if no password
pw = ''
logger.debug('* Getting sha256 of key %s with password "%s"' % (keyfile, pw))
sha256 = None
if os.path.exists(keyfile):
if encoding == 'pem':
try:
pkey_der = subprocess.check_output(
['openssl', 'pkey', '-in', keyfile, '-pubout', '-outform', 'der', '-passin', str('pass:%s' % pw)],
timeout=2, stderr=FNULL)
sha256 = hashlib.sha256(pkey_der).hexdigest()
except (subprocess.CalledProcessError, subprocess.TimeoutExpired):
logger.debug('%s Bad pass!' % keyfile)
else:
asndata = getasn(keyfile)
if asndata:
if 'rsaEncryption' in asndata and 'prim: OCTET STRING' in asndata:
logger.debug('Trying password %s on %s' % (pw, keyfile))
try:
pkey_der = subprocess.check_output(
['openssl', 'pkey', '-inform', 'der', '-in', keyfile, '-pubout', '-outform', 'der',
'-passin', str('pass:%s' % pw)], timeout=2, stderr=FNULL)
sha256 = hashlib.sha256(pkey_der).hexdigest()
logger.debug('%s sha256: %s' % (keyfile, sha256))
except (subprocess.CalledProcessError, subprocess.TimeoutExpired):
logger.debug('%s Bad pass!' % keyfile)
else:
logger.debug('%s is not a DER' % keyfile)
return sha256
def get_sha256(keyfile, keydata, encoding='pem'):
logger.debug('Analyzing and getting sha256...')
keydict = {}
tmpkey = tempfile.NamedTemporaryFile(suffix='.key').name
if keydata:
with open(tmpkey, 'wb') as wp:
wp.write(keydata)
if encoding == 'pem':
logger.debug('PEM encoded key...')
try:
pkey_der = subprocess.check_output(
['openssl', 'pkey', '-in', tmpkey, '-pubout', '-outform', 'der', '-passin', 'pass:'],
timeout=2, stderr=FNULL)
sha256 = hashlib.sha256(pkey_der).hexdigest()
keydict['protected'] = False
keydict['keyhash'] = sha256
except (subprocess.CalledProcessError, subprocess.TimeoutExpired):
keydict['protected'] = True
keydict['keyhash'] = None
logger.debug('%s Bad pass!' % keyfile)
else:
asndata = getasn(keydata)
if asndata:
logger.debug('DER encoded key...')
keydict['asn1'] = asndata
keydict['encoding'] = 'der'
logger.debug('%s ASNDATA:' % keyfile)
if 'X509' in asndata:
logger.debug('Found DER CERTIFICATE: %s' % keyfile)
keydict['iscert'] = True
keydict['type'] = 'certificate'
x509text = decodex509(keydata, encoding='der')
keydict['x509text'] = x509text
keydict['private'] = False
elif 'OBJECT :commonName' in asndata:
logger.debug('Found DER CSR: %s' % keyfile)
keydict['type'] = 'csr'
elif 'rsaEncryption' in asndata and 'prim: OCTET STRING' in asndata:
logger.debug('Found DER PRIVATE KEY: %s' % keyfile)
keydict['type'] = 'privkey'
keydict['private'] = True
try:
pkey_der = subprocess.check_output(
['openssl', 'pkey', '-inform', 'der', '-in', tmpkey, '-pubout', '-outform', 'der',
'-passin', 'pass:'], timeout=2, stderr=FNULL)
sha256 = hashlib.sha256(pkey_der).hexdigest()
keydict['keyhash'] = sha256
keydict['protected'] = False
logger.debug('%s sha256: %s' % (keyfile, sha256))
# sha256 = get_sha256(keyfile, keydata)
foundcrt, url = checkcrt(sha256, keytype='pubkey')
if foundcrt:
logger.debug('%s is listed in crt.sh (PRIVATE KEY)' %
keyfile)
keydict['crt'] = url
except (subprocess.CalledProcessError, subprocess.TimeoutExpired):
logger.debug('%s Bad pass!' % keyfile)
keydict['protected'] = True
elif 'secp160r1' in asndata:
logger.debug('Found DER EC PRIVATE KEY: %s')
keydict['type'] = 'privkey-ec'
keydict['private'] = True
elif 'pbeWithSHA1And3-KeyTripleDES-CBC' in asndata or '1.2.410.200004.1.15' in asndata:
logger.debug('Found DER PKCS8 PRIVATE KEY: %s' % keyfile)
keydict['type'] = 'pkcs8'
keydict['private'] = True
keydict['protected'] = True
elif (
'rsaEncryption' in asndata or '2.557816.113549.1.1.1' in asndata or 'dsaEncryption' in asndata)\
and 'prim: BIT STRING' in asndata:
logger.debug('Found DER PUBLIC KEY: %s' % keyfile)
keydict['type'] = 'pubkey'
keydict['private'] = False
elif 'id-ecPublicKey' in asndata:
logger.debug('Found DER EC PUBLIC KEY: %s' % keyfile)
keydict['type'] = 'pubkey-ec'
keydict['private'] = False
elif 'rsaEncryption' in asndata:
logger.debug('Found DER RSA public key: %s' % keyfile)
keydict['type'] = 'rsa'
keydict['private'] = False
else:
logger.debug('Found DER UKNOWN: %s' % keyfile)
keydict['type'] = 'UNKNOWN (%s)' % get_magic(keyfile)
logger.debug(pformat(asndata))
else:
logger.debug('%s is not a DER' % keyfile)
try:
os.unlink(tmpkey)
except FileNotFoundError:
# Not sure how this can happen, but it apparently can.
pass
return keydict
def get_x509_hash(x509text):
if x509text:
for line in x509text.splitlines():
# line = str(line)
# logger.debug(line)
if line.startswith('SHA256 Fingerprint='):
sha256 = line.replace('SHA256 Fingerprint=', '')
return sha256.replace(':', '').lower()
def decodep12_openssl(keyfile, pw):
p12dict = {}
try:
decoded = subprocess.check_output(
['openssl', 'pkcs12', '-in', keyfile, '-info', '-passin', str(r'pass:%s' % pw), '-nodes'], stderr=FNULL,
timeout=2)
except (subprocess.CalledProcessError, subprocess.TimeoutExpired):
logger.debug('openssl error!')
decoded = None
if decoded:
logger.debug(decoded)
x509text = decodex509(decoded)
sha256 = get_x509_hash(x509text)
p12dict['certhash'] = sha256
p12dict['x509text'] = x509text
# TODO: Is it really private if we only know it's password-protected?
p12dict['private'] = True
p12dict['protected'] = True
p12dict['iskey'] = True
p12dict['iscert'] = True
return p12dict
def get_java_keytype(keydata):
if 'KeyRep' in keydata:
if keydata.endswith('PUBLIC'):
return 'public'
elif keydata.endswith('PRIVATE'):
return 'private'
return None
def checkp8pw(keyfile, pw, encoding='pem'):
cracked = False
try:
if encoding == 'pem':
subprocess.call(
['openssl', 'pkcs8', '-in', keyfile, '-passin', str('pass:%s' % pw), ], stderr=FNULL, timeout=2)
cracked = True
else:
subprocess.call(
['openssl', 'pkcs8', '-inform', 'der', '-in', keyfile, '-passin', str('pass:%s' % pw), ], stderr=FNULL,
timeout=2)
cracked = True
except (subprocess.CalledProcessError, subprocess.TimeoutExpired):
pass
return cracked
def checkp5pw(keyfile, pw, encoding='pem'):
cracked = False
try:
if encoding == 'pem':
subprocess.call(
['openssl', 'pkey', '-in', keyfile, '-passin', str('pass:%s' % pw), ], stderr=FNULL, timeout=2)
cracked = True
else:
subprocess.call(
['openssl', 'pkey', '-inform', 'der', '-in', keyfile, '-passin', str('pass:%s' % pw), ], stderr=FNULL,
timeout=2)
cracked = True
except (subprocess.CalledProcessError, subprocess.TimeoutExpired):
pass
return cracked
def decodep8_openssl(keyfile, pw, encoding='pem'):
# logger.debug('*** falling back to openssl! ***')
p8dict = {}
try:
if encoding == 'pem':
decoded = subprocess.check_output(
['openssl', 'pkcs8', '-in', keyfile, '-passin', str('pass:%s' % pw), ], stderr=FNULL, timeout=2)
else:
decoded = subprocess.check_output(
['openssl', 'pkcs8', '-in', keyfile, '-passin', str('pass:%s' % pw), ], stderr=FNULL, timeout=2)
except (subprocess.CalledProcessError, subprocess.TimeoutExpired):
decoded = None
if decoded:
pass
# logger.debug('***** decoded: *****')
# logger.debug(decoded)
# x509text = decodex509(decoded)
# sha256 = get_x509_hash(x509text)
# p12dict['certhash'] = sha256
# p12dict['x509text'] = x509text
# p12dict['private'] = True
# p12dict['protected'] = True
# p12dict['iskey'] = True
# p12dict['iscert'] = True
return p8dict
def p8_is_protected(keyfile, encoding='pem'):
try:
if encoding == 'pem':
decoded = subprocess.check_output(
['openssl', 'pkcs8', '-in', keyfile, '-nocrypt', '-nodes'], stderr=FNULL)
else:
decoded = subprocess.check_output(
['openssl', 'pkcs8', '-in', keyfile, '-passin', '-nocrypt', '-nodes'], stderr=FNULL)
return False, decoded
except subprocess.CalledProcessError:
return True, None
def decodep12_openssl_nokeys(keyfile, pw):
p12dict = {}
try:
decoded = subprocess.check_output(['openssl', 'pkcs12', '-in', keyfile, '-info', '-passin', str(
'pass:%s' % pw), '-nodes', '-nokeys', '-nomacver'], stderr=FNULL).decode('utf-8', 'backslashreplace')
if 'CERTIFICATE' in decoded:
logger.debug('--- Got certificate w/o keys! ---')
p12dict['x509text'] = decodex509(decoded)
p12dict['iscert'] = True
except subprocess.CalledProcessError:
decoded = None
if decoded:
# logger.debug('***** decoded: *****')
# logger.debug(decoded)
x509 = decodex509(decoded)
if x509:
for line in x509.splitlines():
# line = str(line)
# logger.debug(line)
if line.startswith('SHA256 Fingerprint='):
sha256 = str(line).replace('SHA256 Fingerprint=', '').replace(':', '').lower()
p12dict['certhash'] = sha256
foundcrt, url = checkcrt(sha256)
if foundcrt:
logger.debug('%s is listed in crt.sh (CERTIFICATE)' % keyfile)
p12dict['crt'] = url
return p12dict
def checkcrt(keyhash, keytype='certificate'):
# return None, None
logger.debug('checking crt.sh %s type: %s' % (keyhash, keytype))
# if type == 'certificate':
# return
match = False
url = None
html = None
if keyhash is not None:
if not isinstance(keyhash, str):
type(keyhash)
logger.debug('%s is %s' % (keyhash, type(keyhash)))
keyhash = keyhash.decode('utf-8', 'backslashreplace')
if keytype == 'pubkey':
url = 'https://crt.sh/?spkisha256=%s' % keyhash
logger.debug(url)
try:
html = urlopen(url)
except:
html = None
else:
url = 'https://crt.sh/?q=%s' % keyhash
logger.debug(url)
try:
html = urlopen(url)
except:
html = None
if html:
try:
body = str(html.read())
except:
body = ''
if keytype == 'pubkey':
if 'None found' in body:
pass
elif 'Criteria' in body:
logger.debug('Found public key!')
match = True
# logger.debug(body)
else:
if 'Certificate not found' in body:
pass
elif 'Criteria' in body:
logger.debug('Found certificate!')
match = True
# logger.debug(body)
return match, url
def convertjks(keyfile, pw):
foundcert = False
foundkey = False
reasons = ''
p12keyfile = keyfile + '.p12'
if os.path.exists(p12keyfile):
return p12keyfile
try:
subprocess.check_call(['keytool', '-importkeystore', '-srckeystore', keyfile, '-destkeystore',
p12keyfile, '-deststoretype', 'pkcs12', '-storepass', pw, '-srcstorepass', pw],
stderr=FNULL)
return p12keyfile
except subprocess.CalledProcessError:
logger.debug('Error converting jks file to p12!')
def decodep12(keyfile, pw):
p12dict = {}
foundcert = False
foundkey = False
url = None
reasons = ''
try:
p12 = crypto.load_pkcs12(open(keyfile, 'rb').read(), pw)
p12dict['protected'] = True
logger.debug('pyopenssl loaded crypto OK')
except crypto.Error:
logger.info('pyopenssl crypto error! (bad password?)')
p12 = None
if p12:
logger.debug('checking cert and key...')
if p12.get_certificate():
logger.debug('p12 certificate in %s' % keyfile)
p12dict['iscert'] = True
cert = p12.get_certificate()
sha256 = cert.digest('sha256').decode('utf-8', 'backslashreplace').replace(':', '').lower()
logger.debug('certhash: %s' % sha256)
p12dict['certhash'] = sha256
p12certificate = crypto.dump_certificate(
FILETYPE_PEM, p12.get_certificate())
logger.debug('p12dict-certificate: %s' % p12certificate)
p12dict['x509text'] = decodex509(p12certificate)
logger.debug('x509text:\n\n%s' % p12dict['x509text'])
foundcrt, url = checkcrt(p12dict['certhash'])
if foundcrt:
foundcert = True
p12dict['crt'] = url
# logger.debug('%s has a CERTIFICATE entry in crt.sh (verify)!!' % keyfile)
else:
logger.debug('%s has no certificate! Falling back to openssl...' %
keyfile)
p12dict = decodep12_openssl(keyfile, pw)
if p12.get_privatekey():
p12dict['private'] = True
p12dict['iskey'] = True
p12privatekey = crypto.dump_privatekey(
FILETYPE_PEM, p12.get_privatekey())
kd = get_sha256(keyfile, p12privatekey)
# logger.debug('kd: %s' % kd)
p12dict['keyhash'] = kd['keyhash']
logger.debug('keyhash: %s' % p12dict['keyhash'])
foundcrt, url = checkcrt(p12dict['keyhash'], keytype='pubkey')
if foundcrt:
foundkey = True
p12dict['crt'] = url
# logger.debug('%s has a PUBLIC KEY entry in crt.sh!!' % keyfile)
else:
p12dict['private'] = False
logger.debug('%s has no private key!' % keyfile)
if foundcert or foundkey:
if foundcert:
reasons += 'CERTIFICATE '
if foundkey:
reasons += 'PRIVATE KEY'
logger.info('%s is listed in crt.sh (%s)' % (keyfile, reasons))
p12dict['crt'] = url
logger.debug(p12dict)
return p12dict
def decodekeydata(keyfile, keydata):
encoding = None
iskey = False
iscert = False
asn1 = None
x509text = None
keyhash = None
certhash = None
keydict = {}
kd = {}
logger.debug('Opening %s ...' % keyfile)
if os.path.getsize(keyfile) > 0:
# logger.debug('Non-zero file size. Good.')
if b'PGP PUBLIC' in keydata:
logger.debug('Found public PGP key: %s' % keyfile)
keydict['type'] = 'pgp-public'
keydict['private'] = False
elif b'PGP PRIVATE' in keydata:
logger.debug('Found PRIVATE PGP key: %s' % keyfile)
keydict['type'] = 'pgp-private'
keydict['private'] = True
elif b'BEGIN OpenVPN' in keydata:
logger.debug('Found OpenVPN key: %s' % keyfile)
keydict['type'] = 'OpenVPN'
elif (
b' RSA PRIVATE KEY' in keydata or b' DSA PRIVATE KEY' in keydata) and b'ENCRYPTED' in keydata and \
b'BEGIN CERTIFICATE' in keydata:
logger.debug(
'Found PEM pkcs5 ENCRYPTED PRIVATE key with CERTIFICATE: %s' % keyfile)
keydict['private'] = True
keydict['protected'] = True
keydict['iskey'] = True
keydict['iscert'] = True
keydict['encoding'] = 'pem'
keydict['type'] = 'pkcs5'
x509text = decodex509file(keyfile)
keydict['x509text'] = x509text
sha256 = get_x509_hash(x509text)
keydict['certhash'] = sha256
logger.debug('%s CERT SHA256: %s' % (keyfile, sha256))
# Check certificate first
foundcrt, url = checkcrt(sha256)
if foundcrt:
logger.debug('%s is listed in crt.sh (CERTIFICATE PRIVATE KEY)' %
keyfile)
keydict['crt'] = url
# Fall back to public key
kd = get_sha256(keyfile, keydata)
sha256 = kd['keyhash']
logger.debug('%s KEY SHA256: %s' % (keyfile, sha256))
keydict['keyhash'] = sha256
elif b'BEGIN ENCRYPTED PRIVATE KEY' in keydata and b'BEGIN CERTIFICATE' in keydata:
logger.debug(
'Found PEM pkcs8 ENCRYPTED PRIVATE key with CERTIFICATE: %s' % keyfile)
keydict['private'] = True
keydict['protected'] = True
keydict['iskey'] = True
keydict['iscert'] = True
keydict['encoding'] = 'pem'
keydict['type'] = 'pkcs8'
x509text = decodex509file(keyfile)
keydict['x509text'] = x509text
sha256 = get_x509_hash(x509text)
keydict['certhash'] = sha256
logger.debug('%s CERT SHA256: %s' % (keyfile, sha256))
# Check certificate first
foundcrt, url = checkcrt(sha256)
if foundcrt:
logger.debug('%s is listed in crt.sh (CERTIFICATE PRIVATE KEY)' %
keyfile)
keydict['crt'] = url
# Fall back to public key
kd = get_sha256(keyfile, keydata)
sha256 = kd['keyhash']
logger.debug('%s KEY SHA256: %s' % (keyfile, sha256))
keydict['keyhash'] = sha256
elif (b'BEGIN RSA PRIVATE KEY' in keydata or b'BEGIN DSA PRIVATE KEY' in keydata) and b'ENCRYPTED' in keydata:
logger.debug('Found PEM pkcs5 ENCRYPTED PRIVATE key: %s' % keyfile)
keydict['private'] = True
keydict['iskey'] = True
keydict['encoding'] = 'pem'
keydict['protected'] = True
keydict['type'] = 'pkcs5'
elif b'BEGIN PRIVATE KEY' in keydata and b'BEGIN CERTIFICATE' in keydata:
logger.debug('Found PEM pkcs8 PRIVATE key with CERTIFICATE: %s' % keyfile)
keydict['private'] = True
keydict['protected'] = False
keydict['iskey'] = True
keydict['iscert'] = True
keydict['encoding'] = 'pem'
keydict['type'] = 'pkcs8'
x509text = decodex509file(keyfile)
sha256 = get_x509_hash(x509text)
keydict['certhash'] = sha256
logger.debug('%s SHA256: %s' % (keyfile, sha256))
keydict['x509text'] = x509text
kd = get_sha256(keyfile, keydata)
sha256 = kd['keyhash']
keydict['keyhash'] = sha256
foundcrt, url = checkcrt(sha256, keytype='pubkey')
if foundcrt:
logger.debug('%s is listed in crt.sh (PRIVATE KEY)' % keyfile)
keydict['crt'] = url
elif b'BEGIN ENCRYPTED PRIVATE KEY' in keydata:
logger.debug('Found PEM PKCS8 private key')
keydict['private'] = True
keydict['iskey'] = True
keydict['encoding'] = 'pem'
keydict['protected'] = True
keydict['type'] = 'pkcs8'
elif (
b'BEGIN RSA PRIVATE KEY' in keydata or b'BEGIN DSA PRIVATE KEY' in keydata) and b'BEGIN CERTIFICATE' \
in keydata:
logger.debug('Found PEM pkcs5 PRIVATE key with CERTIFICATE: %s' % keyfile)
keydict['private'] = True
keydict['protected'] = False
keydict['iskey'] = True
keydict['iscert'] = True
keydict['encoding'] = 'pem'
keydict['type'] = 'pkcs5'
x509text = decodex509file(keyfile)
sha256 = get_x509_hash(x509text)
keydict['certhash'] = sha256
logger.debug('%s SHA256: %s' % (keyfile, sha256))
keydict['x509text'] = x509text
kd = get_sha256(keyfile, keydata)
sha256 = kd['keyhash']
keydict['keyhash'] = sha256
foundcrt, url = checkcrt(sha256, keytype='pubkey')
if foundcrt:
logger.debug('%s is listed in crt.sh (PRIVATE KEY)' % keyfile)
keydict['crt'] = url
elif b'BEGIN RSA PRIVATE KEY' in keydata or b'BEGIN DSA PRIVATE KEY' in keydata:
logger.debug('Found PEM pkcs5 PRIVATE key: %s' % keyfile)
kd = get_sha256(keyfile, keydata)
# logger.debug('kd: %s' % kd)
sha256 = kd['keyhash']
keydict['keyhash'] = sha256
keydict['private'] = True
keydict['iskey'] = True
keydict['encoding'] = 'pem'
keydict['type'] = 'pkcs5'
keydict['protected'] = False
foundcrt, url = checkcrt(sha256, keytype='pubkey')
if foundcrt:
logger.debug('%s is listed in crt.sh (PRIVATE KEY)' % keyfile)
keydict['crt'] = url
elif b'BEGIN PRIVATE KEY' in keydata:
logger.debug('Found PEM pkcs5 PRIVATE key: %s' % keyfile)
kd = get_sha256(keyfile, keydata)
# logger.debug('kd: %s' % kd)
sha256 = kd['keyhash']
keydict['keyhash'] = sha256
keydict['private'] = True
keydict['iskey'] = True
keydict['encoding'] = 'pem'
keydict['type'] = 'pkcs8'
keydict['protected'] = False
foundcrt, url = checkcrt(sha256, keytype='pubkey')
if foundcrt:
logger.debug('%s is listed in crt.sh (PRIVATE KEY)' % keyfile)
keydict['crt'] = url
elif b'BEGIN RSA PUBLIC KEY' in keydata:
logger.debug('Found RSA PUBLIC KEY: %s' % keyfile)
keydict['private'] = False
elif b'BEGIN EC PUBLIC KEY' in keydata:
logger.debug('Found EC PUBLIC KEY: %s' % keyfile)
keydict['private'] = False
elif b'BEGIN EC PRIVATE KEY' in keydata:
logger.debug('Found EC PUBLIC KEY: %s' % keyfile)
keydict['private'] = False
elif b'BEGIN PUBLIC KEY' in keydata:
logger.debug('Found PUBLIC KEY: %s' % keyfile)
keydict['private'] = False
keydict['type'] = 'pubkey'
elif b'CERTIFICATE REQUEST' in keydata:
logger.debug('Found CERTIFICATE REQUEST in %s' % keyfile)
elif b'BEGIN CERTIFICATE' in keydata:
logger.debug('Found CERTIFICATE: %s' % keyfile)
x509text = decodex509(keydata)
sha256 = get_x509_hash(x509text)
logger.debug('%s SHA256: %s' % (keyfile, sha256))
keydict['x509text'] = x509text
keydict['private'] = False
keydict['protected'] = False
keydict['type'] = 'certificate'
# elif 'KEY' in keydata:
# logger.debug('Found other KEY: %s' % keyfile)it is
elif b'BEGIN DH PARAMETERS' in keydata:
logger.debug('Found DH parameters: %s' % keyfile)
keydict['private'] = False
keydict['type'] = 'DH'
elif keydata.startswith(b'LGYK'):
logger.debug('Found LGYK file: %s' % keyfile)
else:
# logger.debug('Checking if base64 encoded...')
logger.debug('Found unknown key. base64 encoded?: %s' % keyfile)
b64encoded, newkeydata = decode_b64(keyfile, keydata)
if b64encoded:
logger.debug('base64 encoded data found in %s' % keyfile)
# recurse into key detection
keydict = decodekeydata(keyfile, newkeydata)
else:
logger.debug('No more base64 decoding to with %s' % keyfile)
kd = get_sha256(keyfile, keydata, encoding='der')
# logger.debug('kd: %s' % kd)
if 'keyhash' in kd:
keydict['keyhash'] = kd['keyhash']
if 'certhash' in kd:
keydict['certhash'] = kd['certhash']
logger.debug('Enumerating properties...')
if not keydict:
for prop in kd:
keydict[prop] = kd[prop]
return keydict
def decodex509file(keyfile):
try:
decoded = subprocess.check_output(
['openssl', 'x509', '-in', keyfile, '-text', '-fingerprint', '-sha256']).decode('utf-8', 'backslashreplace')
return decoded
except subprocess.CalledProcessError:
return None
def decodex509(keydata, encoding='pem'):
decoded = None
if keydata:
tmpkey = tempfile.NamedTemporaryFile(suffix='.key').name
# logger.debug(keydata)
if isinstance(keydata, str):
# Don't try to write a string object to a binary file
try:
keydata = keydata.encode()
except UnicodeDecodeError:
try:
keydata = keydata.decode('utf-8').encode('utf-8')
except:
pass
with open(tmpkey, 'wb') as wp:
wp.write(keydata)
if encoding == 'pem':
try:
decoded = subprocess.check_output(
['openssl', 'x509', '-in', tmpkey, '-text', '-fingerprint', '-sha256']).decode('utf-8',
'backslashreplace')
except subprocess.CalledProcessError:
pass
except:
# Python 2.x isn't so good at Unicode
pass
else:
try:
decoded = subprocess.check_output(
['openssl', 'x509', '-in', tmpkey, '-inform', 'der', '-text', '-fingerprint', '-sha256']).decode(
'utf-8', 'backslashreplace')
except subprocess.CalledProcessError:
pass
except:
# Python 2.x isn't so good at Unicode
pass
os.unlink(tmpkey)
return decoded
def getsubject(keydata):
# logger.debug(keydata)
if keydata:
keylines = keydata.splitlines()
for line in keylines:
if line.startswith('subject='):
subject = re.sub('^subject=', '', line)
return subject
def getcn(keydata):
if keydata:
subject = getsubject(keydata)
# logger.debug('subject: %s' % subject)
splitsubject = subject.split('/CN=')
if len(splitsubject) > 1:
cnline = splitsubject[1]
splitcnline = cnline.split('/')
cn = splitcnline[0]
return cn
else:
return subject
def extract_keyfile(apkpath, keyfile):
appname = getappname(apkpath)
keys_dir = os.path.join('keys', appname)
keyfile_path = os.path.normpath(os.path.join(keys_dir, keyfile))
if not os.path.exists(keyfile_path):
logger.debug('Extracting %s from %s' % (keyfile, apkpath))
apkfile = zipfile.ZipFile(apkpath)
apkfile.extract(keyfile, keys_dir)
else:
pass
# clean up mismatched '/' and '\\' directory separators
keyfile = os.path.normpath(keyfile)
return os.path.join(keys_dir, keyfile)
def getbkscontents(bksfilepath, password):
output = None