[gnutls-devel] GnuTLS | Verification of deterministic RSA-PSS signature fails (#953)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Fri Mar 13 20:57:22 CET 2020

Nikos Mavrogiannopoulos commented:

To my understanding the RSA-PSS signature does not contain the salt size thus the salt size needs to be provided somehow. The verification functions will read the parameters from the certificate (see `fixup_spki_params()`) or assume some defaults. That's the case here, the verification function has no way to be told that this is a key with zero salt.

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