Created
June 22, 2021 00:16
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How to debug Twisted TLS with wireshark
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# 1. setup environment SSLKEYLOGFILE, value is a file path, I set it to /tmp/.ssl-key.log | |
# 2. put /tmp/.ssl-key.log to wireshark TLS pre-master key path | |
# 3. use following code, setup pyOpenSSL key log callback | |
certificateOptions = OpenSSLCertificateOptions( | |
trustRoot=platformTrust(), | |
acceptableProtocols=[b'h2'], | |
) | |
ctx = certificateOptions.getContext() | |
def append_to_key_log_file(key): | |
log_file_path = os.getenv('SSLKEYLOGFILE') | |
with open(log_file_path, 'ab+') as f: | |
f.write(key + b'\n') | |
ctx.set_keylog_callback(lambda _, key: append_to_key_log_file(key)) | |
options = ClientTLSOptions(AUTHORITY, ctx) | |
connectProtocol( | |
SSL4ClientEndpoint(reactor, AUTHORITY, 443, options), | |
H2Protocol() | |
) | |
reactor.run() |
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