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June 2, 2021 08:08
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Simple script to extract the server cert of a given domain
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#!/usr/bin/env python | |
# -*- coding: utf-8 -*- | |
import ssl | |
import OpenSSL | |
cert = ssl.get_server_certificate(('google.de', 443)) | |
x509 = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, cert) | |
print 'Expired: {}'.format(x509.has_expired()) | |
print 'Signature Algorithm: {}\n'.format(x509.get_signature_algorithm()) | |
for item in x509.get_subject().get_components(): | |
print 'Subject {}: {}'.format(item[0], item[1]) | |
print 'Subject Hash: {}\n'.format(x509.get_subject().hash()) | |
for item in x509.get_issuer().get_components(): | |
print 'Issuer {}: {}'.format(item[0], item[1]) | |
print 'Issuer Hash: {}\n'.format(x509.get_issuer().hash()) | |
for i in xrange(x509.get_extension_count()): | |
print 'Extension {}: {}'.format(x509.get_extension(i).get_short_name(), x509.get_extension(i).__str__()) | |
print '\nPublic Key Bits: {}'.format(x509.get_pubkey().bits()) | |
print 'Public Key Type: {}'.format(x509.get_pubkey().type()) | |
print 'Public Key only public: {}'.format(x509.get_pubkey()._only_public) | |
print 'Public Key initialized: {}'.format(x509.get_pubkey()._initialized) | |
aa = x509.get_serial_number() | |
bb = hex(aa).rstrip('L').lstrip('0x') | |
print 'Serial Number: {}'.format(x509.get_serial_number()) | |
print 'Serial Number Hex: {}'.format(':'.join(s.encode('hex').upper() for s in bb.decode('hex'))) | |
print 'Serial Number Length: {}\n'.format(x509.get_serial_number().bit_length()) | |
print 'MD5: {}'.format(x509.digest('md5')) | |
print 'SHA1: {}'.format(x509.digest('sha1')) | |
print 'SHA224: {}'.format(x509.digest('sha224')) | |
print 'SHA256: {}'.format(x509.digest('sha256')) | |
print 'SHA384: {}'.format(x509.digest('sha384')) | |
print 'SHA512: {}\n'.format(x509.digest('sha512')) | |
print 'Valid from: {}'.format(x509.get_notBefore()) | |
print 'Valid until: {}'.format(x509.get_notAfter()) |
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