[gnutls-devel] GnuTLS | Do not use HMAC-SHA1 for session ticket authentication algorithm (#1482)

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Sun May 7 04:14:03 CEST 2023

Daiki Ueno commented: https://gitlab.com/gnutls/gnutls/-/issues/1482#note_1380868841

This turned out not so trivial, as it increases the entire key size from 64 to 80, which breaks the [assumption](https://gitlab.com/gnutls/gnutls/-/blob/0263dec937e02ab71fd9cb158fa69acf7c374481/lib/stek.c) of the key rotation logic. Perhaps we could switch the SHA3-512 usage to using SHAKE, generating 80-byte output, or repeatedly call the hash function.

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