initial commit
This commit is contained in:
brent s
commit
82fed08a12
18
.gitignore
vendored
Normal file
18
.gitignore
vendored
Normal file
@ -0,0 +1,18 @@
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*/
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.*.swp
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*.pkg.tar.xz
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src/
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pkg/
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*.tar
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*.tar.bz2
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*.tar.xz
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*.tar.gz
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*.tgz
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*.txz
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*.tbz
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*.tbz2
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*.zip
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*.run
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*.7z
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*.rar
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*.deb
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474
certparser.py
Executable file
474
certparser.py
Executable file
@ -0,0 +1,474 @@
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#!/usr/bin/env python3
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# stdlib
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import argparse
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import collections
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import copy
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import datetime
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import hashlib
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import importlib
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import ipaddress
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import json
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import os
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import pprint
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import re
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import shutil
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import socket
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import ssl
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from urllib import parse
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# PyPi/PIP
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# These are handled automagically.
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# If you'd rather install them via your distro's package manager (YOU SHOULD),
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# then install them first then run this script.
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# Otherwise you'll have to use pip to remove them.
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thrd_prty = {'OpenSSL': 'pyOpenSSL',
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#'pyasn1': 'pyasn1',
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#'jinja2': 'Jinja2',
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'validators': 'validators'}
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cols = shutil.get_terminal_size((80, 20)).columns
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for mod in thrd_prty:
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try:
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globals()[mod] = importlib.import_module(mod)
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except ImportError:
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import pip
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pip.main(['install', '--quiet', '--quiet', '--quiet',
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'--user', thrd_prty[mod]])
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globals()[mod] = importlib.import_module(mod)
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class CertParse(object):
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def __init__(self, target, port = 443, force = None, cert_type = 'pem',
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json_fmt = False, starttls = False, extensions = False,
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alt_names = False):
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self.target = target
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self.port = port
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self.force_type = force
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self.cert_type = cert_type
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self.starttls = starttls
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self.json_fmt = json_fmt
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self.extensions = extensions
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self.alt_names = alt_names
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self.cert = None
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self.certinfo = None
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self.get_type()
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def getCert(self):
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if self.cert_type.lower() == 'pem':
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self.cert_type = OpenSSL.crypto.FILETYPE_PEM
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elif self.cert_type.lower() == 'asn1':
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self.cert_type = OpenSSL.crypto.FILETYPE_ASN1
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else:
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raise ValueError(('{0} is not a valid cert type; must be either ' +
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'"pem" or "asn1"').format(self.cert_type))
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if not self.force_type in ('url', 'domain', 'ip'):
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with open(self.target, 'rb') as f:
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self.cert = OpenSSL.crypto.load_certificate(self.cert_type,
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f.read())
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else:
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_cert = ssl.get_server_certificate((self.target, self.port))
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self.cert = OpenSSL.crypto.load_certificate(self.cert_type,
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_cert)
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return()
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def parseCert(self):
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certinfo = collections.OrderedDict()
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timefmt = '%Y%m%d%H%M%SZ'
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certinfo['Subject'] = self.parse_name(self.cert.get_subject().\
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get_components())
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certinfo['EXPIRED'] = self.cert.has_expired()
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certinfo['Issuer'] = self.parse_name(self.cert.get_issuer().\
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get_components())
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certinfo['Issued'] = str(datetime.datetime.strptime(
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self.cert.get_notBefore().decode('utf-8'),
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timefmt))
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certinfo['Expires'] = str(datetime.datetime.strptime(
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self.cert.get_notAfter().decode('utf-8'),
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timefmt))
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if self.extensions:
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certinfo['Extensions'] = self.parse_ext()
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elif self.alt_names:
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certinfo['SANs'] = self.parse_ext_san_only()
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certinfo['Pubkey'] = self.get_pubkey()
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certinfo['Serial'] = int(self.cert.get_serial_number())
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certinfo['Signature Algorithm'] = self.cert.get_signature_algorithm().\
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decode('utf-8')
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certinfo['Version'] = self.cert.get_version()
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certinfo['Subject Name Hash'] = self.cert.subject_name_hash()
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certinfo['Fingerprints'] = self.gen_hashes()
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self.certinfo = certinfo
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return()
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def print(self, json_fmt = None):
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if json_fmt is None:
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json_fmt = self.json_fmt
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if json_fmt:
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output = json.dumps(self.certinfo, indent = 4)
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else:
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output = self.certinfo
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if __name__ == '__main__':
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if not json_fmt:
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pprint.pprint(output, compact = False, width = cols)
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else:
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print(output)
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return()
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return(output)
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def get_pubkey(self):
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pubkey = {}
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key = self.cert.get_pubkey()
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pubkey['Bit Length'] = key.bits()
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# I wish there was a more comfortable way of comparing these.
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if key.type() == OpenSSL.crypto.TYPE_RSA:
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pubkey['Algorithm'] = 'RSA'
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elif key.type() == OpenSSL.crypto.TYPE_DSA:
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pubkey['Algorithm'] = 'DSA'
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return(pubkey)
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def gen_hashes(self):
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hashes = {}
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# Note: MD2 is *so old* that they aren't even
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# *supported in python 3*.
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# If we NEED to implement, https://urchin.earth.li/~twic/md2.py
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fpt_types = sorted([i.lower() for i in ['md2', 'md5', 'sha1', 'mdc2',
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'ripemd160', 'blake2b512',
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'blake2s256', 'sha224',
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|
'sha256', 'sha384', 'sha512']])
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|
supported_types = sorted([i.lower() for i in \
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list(hashlib.algorithms_available)])
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cert_hash_types = [i for i in fpt_types if i in supported_types]
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for h in cert_hash_types:
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hashes[h.upper()] = self.cert.digest(h).decode('utf-8')
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return(hashes)
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def parse_name(self, item):
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component_map = {'C': 'Country',
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|
'countryName': 'Country',
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|
'ST': 'State/Province',
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|
'stateOrProvinceName': 'State/Province',
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|
'L': 'Locality/City/Town/Region',
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'localityName': 'Locality/City/Town/Region',
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|
'O': 'Organization',
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|
'organizationName': 'Organization',
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|
'OU': 'Department/Team/Organization Unit',
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'organizationalUnitName': ('Department/Team/' +
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'Organization Unit'),
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'CN': 'Common name',
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'commonName': 'Common name',
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'emailAddress': 'eMail Address'}
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info = {}
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for c in item:
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item = c[0].decode('utf-8')
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|
value = c[1].decode('utf-8')
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|
if item in component_map.keys():
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|
info[component_map[item]] = value
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|
else:
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|
info[item] = value
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|
return(info)
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|
def parse_ext_san_only(self):
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|
SANs = []
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|
for idx in range(0, self.cert.get_extension_count()):
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|
ext = self.cert.get_extension(idx)
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name = ext.get_short_name().decode('utf-8').lower()
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x = str(ext).strip()
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|
if name == 'subjectaltname':
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|
val_lst = [i.strip() for i in x.split(',')]
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|
for v in val_lst:
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|
parsed_val = re.sub('^\s*DNS:\s*(.*)', '\g<1>', v)
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|
if parsed_val not in ('\n', ''):
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|
SANs.append(parsed_val.lower())
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|
return(SANs)
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|
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|
def parse_ext(self):
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|
exts = {}
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for idx in range(0, self.cert.get_extension_count()):
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|
ext = self.cert.get_extension(idx)
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|
keyname = ext.get_short_name().decode('utf-8')
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value_str = str(ext).strip()
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|
# These should be split into lists by commas.
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|
if keyname in ('subjectAltName', 'keyUsage', 'extendedKeyUsage',
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|
'basicConstraints'):
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|
val_lst = [i.strip() for i in value_str.split(',')]
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|
value_str = []
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|
for v in val_lst:
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|
parsed_val = re.sub('^\s*DNS:\s*(.*)', '\g<1>', v)
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||||||
|
if parsed_val not in ('\n', ''):
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|
value_str.append(parsed_val)
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|
# These should be split into lists by lines.
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||||||
|
elif keyname in ('certificatePolicies', 'ct_precert_scts',
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||||||
|
'authorityInfoAccess'):
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||||||
|
val_lst = [i.strip() for i in value_str.splitlines()]
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||||||
|
value_str = []
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||||||
|
for v in val_lst:
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|
value_str.append(v)
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||||||
|
exts[keyname] = value_str
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||||||
|
# These are split FURTHER into dicts but require unique... massaging.
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||||||
|
# authorityInfoAccess
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||||||
|
if 'authorityInfoAccess' in exts.keys():
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||||||
|
_tmp = copy.deepcopy(exts['authorityInfoAccess'])
|
||||||
|
exts['authorityInfoAccess'] = {}
|
||||||
|
for i in _tmp:
|
||||||
|
x = [n.strip() for n in i.split('-', 1)]
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||||||
|
y = [n.strip() for n in x[1].split(':', 1)]
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||||||
|
exts['authorityInfoAccess'][x[0]] = {y[0]: y[1]}
|
||||||
|
# authorityKeyIdentifier
|
||||||
|
if 'authorityKeyIdentifier' in exts.keys():
|
||||||
|
_tmp = copy.deepcopy(exts['authorityKeyIdentifier'])
|
||||||
|
exts['authorityKeyIdentifier'] = {_tmp.split(':', 1)[0]:
|
||||||
|
_tmp.split(':', 1)[1]}
|
||||||
|
# basicConstraints
|
||||||
|
if 'basicConstraints' in exts.keys():
|
||||||
|
_tmp = copy.deepcopy(exts['basicConstraints'])
|
||||||
|
exts['basicConstraints'] = {}
|
||||||
|
for i in _tmp:
|
||||||
|
x = [n.strip() for n in i.split(':', 1)]
|
||||||
|
if len(x) >= 1:
|
||||||
|
if x[1].lower() in ('true', 'false'):
|
||||||
|
x[1] = (x[1].lower() == 'true')
|
||||||
|
exts['basicConstraints'][x[0]] = x[1]
|
||||||
|
else:
|
||||||
|
exts['basicConstraints'][x[0]] = True
|
||||||
|
# certificatePolicies
|
||||||
|
# What a mess.
|
||||||
|
if 'certificatePolicies' in exts.keys():
|
||||||
|
_tmp = copy.deepcopy(exts['certificatePolicies'])
|
||||||
|
exts['certificatePolicies'] = {}
|
||||||
|
last_key = None
|
||||||
|
for i in [n.strip() for n in _tmp]:
|
||||||
|
l = [y for y in i.split(':', 1) if y not in ('', None)]
|
||||||
|
if len(l) > 1:
|
||||||
|
# It MAY be a key:value.
|
||||||
|
if re.search('^\s+', l[1]):
|
||||||
|
val = l[1].strip()
|
||||||
|
if last_key == 'Policy':
|
||||||
|
if not isinstance(exts['certificatePolicies']\
|
||||||
|
[last_key],
|
||||||
|
list):
|
||||||
|
exts['certificatePolicies'][last_key] = [
|
||||||
|
exts['certificatePolicies'][last_key]]
|
||||||
|
exts['certificatePolicies'][last_key].append(val)
|
||||||
|
# I can't seem to get CPS as a separate dict.
|
||||||
|
# Patches welcome.
|
||||||
|
# Also, are CPS and User Notice *subitems* of Policy
|
||||||
|
# items?
|
||||||
|
elif last_key not in ('User Notice', 'CPS'):
|
||||||
|
# It's a value.
|
||||||
|
last_key = l[0].strip()
|
||||||
|
exts['certificatePolicies'][last_key] = val
|
||||||
|
else:
|
||||||
|
k = l[0].strip()
|
||||||
|
exts['certificatePolicies'][last_key][k] = val
|
||||||
|
else:
|
||||||
|
# Standalone key line
|
||||||
|
last_key = l[0].strip()
|
||||||
|
exts['certificatePolicies'][last_key] = {}
|
||||||
|
# ct_precert_scts
|
||||||
|
# another mess. a much. much, bigger mess.
|
||||||
|
if 'ct_precert_scts' in exts.keys():
|
||||||
|
_tmp = copy.deepcopy(exts['ct_precert_scts'])
|
||||||
|
exts['ct_precert_scts'] = {}
|
||||||
|
last_key = None
|
||||||
|
last_sub_key = None
|
||||||
|
cnt = 0
|
||||||
|
for i in [n.strip() for n in _tmp]:
|
||||||
|
l = [y for y in i.split(':', 1) if y not in ('', None)]
|
||||||
|
if len(l) > 1:
|
||||||
|
# Is it a line continuation (of a hex value)?
|
||||||
|
if ((re.search('^[0-9A-Z]{2}$', l[0])) and
|
||||||
|
(re.search('^[0-9A-Z:]*:?$', ':'.join(l)))):
|
||||||
|
exts['ct_precert_scts'][last_key][cnt]\
|
||||||
|
[last_sub_key] += ':'.join(l)
|
||||||
|
continue
|
||||||
|
# It MAY be a key:value.
|
||||||
|
if re.search('^\s+', l[1]) and (
|
||||||
|
last_key !=
|
||||||
|
'Signed Certificate Timestamp'):
|
||||||
|
# It's a value.
|
||||||
|
last_key = l[0].strip()
|
||||||
|
val = l[1].strip()
|
||||||
|
if val.lower() == 'none':
|
||||||
|
val = None
|
||||||
|
exts['ct_precert_scts'][last_key] = val
|
||||||
|
elif re.search('^\s+', l[1]):
|
||||||
|
last_sub_key = l[0].strip()
|
||||||
|
val = l[1].strip()
|
||||||
|
if val.lower() == 'none':
|
||||||
|
val = None
|
||||||
|
if last_sub_key == 'Signature':
|
||||||
|
val += ' '
|
||||||
|
exts['ct_precert_scts'][last_key][cnt]\
|
||||||
|
[last_sub_key] = val
|
||||||
|
else:
|
||||||
|
# Standalone key line
|
||||||
|
last_key = l[0].strip()
|
||||||
|
if last_key == 'Signed Certificate Timestamp':
|
||||||
|
if last_key not in exts['ct_precert_scts'].keys():
|
||||||
|
exts['ct_precert_scts'][last_key] = [{}]
|
||||||
|
else:
|
||||||
|
exts['ct_precert_scts'][last_key].append({})
|
||||||
|
cnt += 1
|
||||||
|
# some laaaast bit of cleanup...
|
||||||
|
if 'Signed Certificate Timestamp' in exts['ct_precert_scts']:
|
||||||
|
for i in exts['ct_precert_scts']\
|
||||||
|
['Signed Certificate Timestamp']:
|
||||||
|
if 'Signature' in i.keys():
|
||||||
|
d = i['Signature'].split()
|
||||||
|
i['Signature'] = {d[0]: d[1]}
|
||||||
|
return(exts)
|
||||||
|
|
||||||
|
def get_domain_from_url(self, url):
|
||||||
|
orig_url = url
|
||||||
|
# Needed in case a URL is passed with no http:// or https://, etc.
|
||||||
|
url = re.sub('^((ht|f)tps?://)*',
|
||||||
|
'https://',
|
||||||
|
url,
|
||||||
|
re.IGNORECASE).lower()
|
||||||
|
if not self.validURL(url):
|
||||||
|
raise ValueError(('{0} is not a valid URL').format(orig_url))
|
||||||
|
domain = parse.urlparse(url).netloc
|
||||||
|
return(domain)
|
||||||
|
|
||||||
|
def validIP(self, ip):
|
||||||
|
is_valid = False
|
||||||
|
try:
|
||||||
|
ipaddress.ip_address(self.target)
|
||||||
|
is_valid = True
|
||||||
|
except ValueError:
|
||||||
|
pass
|
||||||
|
return(is_valid)
|
||||||
|
|
||||||
|
def validDomain(self, domain):
|
||||||
|
is_valid = False
|
||||||
|
if not isinstance(validators.domain(domain),
|
||||||
|
validators.utils.ValidationFailure):
|
||||||
|
is_valid = True
|
||||||
|
return(is_valid)
|
||||||
|
|
||||||
|
def validURL(self, url):
|
||||||
|
is_valid = False
|
||||||
|
if not isinstance(validators.url(url),
|
||||||
|
validators.utils.ValidationFailure):
|
||||||
|
is_valid = True
|
||||||
|
return(is_valid)
|
||||||
|
|
||||||
|
def validPath(self, path):
|
||||||
|
is_valid = False
|
||||||
|
if os.path.isfile(path):
|
||||||
|
is_valid = True
|
||||||
|
return(is_valid)
|
||||||
|
|
||||||
|
def get_type(self):
|
||||||
|
if self.force_type:
|
||||||
|
# Just run the validator and some cleanup.
|
||||||
|
if self.force_type == 'url':
|
||||||
|
self.target = self.get_domain_from_url(self.target)
|
||||||
|
chk = self.validURL(self.target)
|
||||||
|
if chk:
|
||||||
|
self.force_type = 'domain'
|
||||||
|
elif self.force_type == 'ip':
|
||||||
|
chk = self.validIP(self.target)
|
||||||
|
elif self.force_type == 'domain':
|
||||||
|
chk = self.validDomain(self.target)
|
||||||
|
elif self.force_type == 'file':
|
||||||
|
self.target = os.path.abspath(os.path.expanduser(self.target))
|
||||||
|
chk = self.validPath(self.target)
|
||||||
|
if not chk:
|
||||||
|
raise TypeError(('{0} does not appear to be a valid ' +
|
||||||
|
'instance of type {1}'.format(self.target,
|
||||||
|
self.force_type)
|
||||||
|
))
|
||||||
|
if self.force_type in ('url', 'domain', 'ip'):
|
||||||
|
self.remote = True
|
||||||
|
else:
|
||||||
|
self.remote = False
|
||||||
|
return()
|
||||||
|
# Is it an IP address?
|
||||||
|
if self.validIP(self.target):
|
||||||
|
self.force_type = 'ip'
|
||||||
|
return()
|
||||||
|
# Is it a filepath?
|
||||||
|
fpath = os.path.abspath(os.path.expanduser(self.target))
|
||||||
|
if self.validPath(fpath):
|
||||||
|
self.target = fpath
|
||||||
|
self.force_type = 'file'
|
||||||
|
return()
|
||||||
|
# Is it a domain?
|
||||||
|
if self.validDomain(self.target):
|
||||||
|
self.force_type = 'domain'
|
||||||
|
return()
|
||||||
|
# Lastly, is it a URL?
|
||||||
|
if self.validURL(self.target):
|
||||||
|
domain = self.get_domain_from_url(self.target)
|
||||||
|
if self.validDomain(domain):
|
||||||
|
self.target = domain
|
||||||
|
self.force_type = 'domain'
|
||||||
|
if not self.force_type: # We couldn't detect it
|
||||||
|
raise RuntimeError(('Automatic type detection of {0} requested ' +
|
||||||
|
'but we could not determine what type of ' +
|
||||||
|
'resource it is'))
|
||||||
|
return()
|
||||||
|
|
||||||
|
def parseArgs():
|
||||||
|
args = argparse.ArgumentParser()
|
||||||
|
args.add_argument('-e', '--extensions',
|
||||||
|
dest = 'extensions',
|
||||||
|
action = 'store_true',
|
||||||
|
help = ('If specified, include ALL extension info ' +
|
||||||
|
'(this DRASTICALLY increases the output. You ' +
|
||||||
|
'have been warned)'))
|
||||||
|
args.add_argument('-a', '--alt-names',
|
||||||
|
dest = 'alt_names',
|
||||||
|
action = 'store_true',
|
||||||
|
help = ('If specified, ONLY include the SAN (Subject ' +
|
||||||
|
'Alt Name) extension. This is highly ' +
|
||||||
|
'recommended over -e/--extensions. Ignored if ' +
|
||||||
|
'-e/--extensions is set (as the SANs are ' +
|
||||||
|
'included in that)'))
|
||||||
|
args.add_argument('-j','--json',
|
||||||
|
dest = 'json_fmt',
|
||||||
|
action = 'store_true',
|
||||||
|
help = ('If specified, return the results in JSON'))
|
||||||
|
args.add_argument('-f', '--force',
|
||||||
|
choices = ['url', 'domain', 'ip', 'file'],
|
||||||
|
default = None,
|
||||||
|
help = ('If specified, force the TARGET to be parsed ' +
|
||||||
|
'as the given type'))
|
||||||
|
args.add_argument('-p', '--port',
|
||||||
|
dest = 'port',
|
||||||
|
type = int,
|
||||||
|
default = 443,
|
||||||
|
help = ('Use a port other than 443 (only used for ' +
|
||||||
|
'URL/domain/IP address targets)'))
|
||||||
|
args.add_argument('-t', '--cert-type',
|
||||||
|
dest = 'cert_type',
|
||||||
|
default = 'pem',
|
||||||
|
choices = ['pem', 'asn1'],
|
||||||
|
help = ('The type of certificate (only used for '
|
||||||
|
'file targets). Note that "DER"-encoded ' +
|
||||||
|
'certificates should use "asn1". The default ' +
|
||||||
|
'is pem'))
|
||||||
|
# TODO: I think the starttls process depends on the protocol? If so, this...
|
||||||
|
# won't be feasible.
|
||||||
|
# args.add_argument('-s', '--starttls',
|
||||||
|
# dest = 'starttls',
|
||||||
|
# action = 'store_true',
|
||||||
|
# help = ('If specified, initiate STARTTLS on the ' +
|
||||||
|
# 'target instead of pure SSL/TLS'))
|
||||||
|
args.add_argument('TARGET',
|
||||||
|
help = ('The target to gather cert info for. Can be a ' +
|
||||||
|
'filepath (to the certificate, not key etc.), ' +
|
||||||
|
'a URL/domain, or IP address'))
|
||||||
|
return(args)
|
||||||
|
|
||||||
|
def main():
|
||||||
|
args = vars(parseArgs().parse_args())
|
||||||
|
args['target'] = copy.deepcopy(args['TARGET'])
|
||||||
|
del(args['TARGET'])
|
||||||
|
p = CertParse(**args)
|
||||||
|
p.getCert()
|
||||||
|
p.parseCert()
|
||||||
|
p.print()
|
||||||
|
|
||||||
|
if __name__ == '__main__':
|
||||||
|
main()
|
||||||
Loading…
Reference in New Issue
Block a user