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RFC 9266: Channel Bindings for TLS 1.3 #4191 #4772

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RFC 9266: Channel Bindings for TLS 1.3 #4191 #4772

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Commits on Dec 18, 2023

  1. RFC 9266: Channel Bindings for TLS 1.3 cyrusimap#4191 

    TLS connections of the IMAPD service provide channel binding data
for the SASL authentication layer. The current implementation
sets the correct "tls-unique" channel binding data for TLS
versions 1.2 and lower, however not for TLS version 1.3.

TLS version 1.3 requires using specific exporter keying material
(EKM) according to RFC 9266 Section 2:
Label:      "EXPORTER-Channel-Binding"
Context:    Zero-length string
Key Length: 32 bytes

Signed-off-by: Guido Kiener <[email protected]>
    @GuidoKiener
    GuidoKiener committed Dec 18, 2023
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