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f39efd0317
The way in which TLS 1.3 is negotiated was changed slightly in later revisions of the standard. The final version is only sent in an extension - while the version field in the server hello still shows TLS 1.2. This patch makes ssl.log show the correct version again.
19 lines
888 B
Text
19 lines
888 B
Text
# @TEST-EXEC: bro -C -r $TRACES/tls/chrome-63.0.3211.0-canary-tls_experiment.pcap %INPUT
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# @TEST-EXEC: btest-diff ssl.log
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# @TEST-EXEC: btest-diff .stdout
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# This is a trace that uses a completely non-standard way of establishing TLS 1.3; this seems
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# to be an undocumented extension where the TLS version is negotiated via the server sending back
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# an supported_versions extension (which, according to the RFC is strictly prohibited).
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#
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# This only seems to happen with Chrome talking to google servers. We do not recognize this as
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# TLS 1.3, but we do not abort when encountering traffic like this.
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#
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# In the meantime this way of establishing TLS 1.3 was standardized. Still keeping the test even
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# though we parse this correctly now.
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event ssl_extension(c: connection, is_orig: bool, code: count, val: string)
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{
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if ( ! is_orig && code == 43 )
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print bytestring_to_hexstr(val);
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}
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