TLS: Initial support for printing TLS PDUs#990
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ryandoyle wants to merge 1 commit intothe-tcpdump-group:masterfrom
Open
TLS: Initial support for printing TLS PDUs#990ryandoyle wants to merge 1 commit intothe-tcpdump-group:masterfrom
ryandoyle wants to merge 1 commit intothe-tcpdump-group:masterfrom
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Thank you for preparing these changes. Apparently, |
Supports printing plain text parts of TLS. Basic record layer printing is supported as well as more complex printing of handshake and alert protocols, specifically ClientHello and ServerHello - these will print interesting parts of TLS extensions like ALPN, SNI and the underlying TLS version negotiated. As we don't keep state and TLS is stateful, this printer does assume/ is limited by this, specifically: * TLS version is printed as per record layer version. In the case of TLS 1.3, the record layer is set to TLS 1.2, and the supported_versions extension is used to negotiate the actual version used. * Alert and Handshake protocol messages can be plain text or encrypted, depending on if a crypto context is established. This printer doesn't know this, so we try to detect it and print "(likely encrypted)".
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Cheers @infrastation, fixed 👍 |
its0x08
approved these changes
Apr 17, 2022
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Supports printing plain text parts of TLS. Basic record layer printing is
supported as well as more complex printing of handshake and alert protocols,
specifically ClientHello and ServerHello - these will print interesting parts
of TLS extensions like ALPN, SNI and the underlying TLS version negotiated.
As we don't keep state and TLS is stateful, this printer does assume/
is limited by this, specifically:
the record layer is set to TLS 1.2, and the supported_versions extension is
used to negotiate the actual version used.
depending on if a crypto context is established. This printer doesn't know
this, so we try to detect it and print "(likely encrypted)".