Created
October 5, 2019 08:02
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Get fingerprints of certificates in certificate chain (python)
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| """ | |
| https://stackoverflow.com/questions/19145097/ | |
| """ | |
| import socket | |
| from OpenSSL import SSL | |
| import certifi | |
| hostname='www.google.com' | |
| port=443 | |
| context = SSL.Context(method=SSL.TLSv1_METHOD) | |
| context.load_verify_locations(cafile=certifi.where()) | |
| conn = SSL.Connection(context, socket=socket.socket(socket.AF_INET, socket.SOCK_STREAM)) | |
| conn.settimeout(5) | |
| conn.connect((hostname, port)) | |
| conn.setblocking(1) | |
| conn.do_handshake() | |
| conn.set_tlsext_host_name(hostname.encode()) | |
| for (idx, cert) in enumerate(conn.get_peer_cert_chain()): | |
| print(f'{idx} subject: {cert.get_subject()}') | |
| print(f' issuer: {cert.get_issuer()})') | |
| print(f' fingerprint: {cert.digest("sha1")}') | |
| conn.close() |
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