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aws-lc-rs: reduce priority of ECDSA_NISTP521_SHA512 #1924

Merged
merged 1 commit into from
May 3, 2024

Commits on Apr 26, 2024

  1. aws-lc-rs: reduce priority of ECDSA_NISTP521_SHA512

    In TLS1.2, this actually means ECDSA_SHA512.  If the peer selects
    that, we get caught out depending on the curve of the public key
    because we don't support (for example) `ECDSA_NISTP256_SHA512`.
    
    Reducing the preference of this improves matters, because a
    peer that respects our priority will only select that if nothing
    else is possible (which includes the cases that SHA256 and SHA384
    are not supported, in which case we are hosed, but also if the
    version is TLS1.3 and public key is on P521).
    ctz committed Apr 26, 2024
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