tree eef21da5aa19c418afb16f0f33a8df08e3bc705c
parent 449e02e909af08d009d9ce66db2af9bfb95ef60e
author Gilles Peskine <Gilles.Peskine@arm.com> 1647435289 +0100
committer Gilles Peskine <Gilles.Peskine@arm.com> 1649164756 +0200

Fix psa_mac_verify() returning BUFFER_TOO_SMALL

It doesn't make sense for psa_mac_verify() to return
PSA_ERROR_BUFFER_TOO_SMALL since it doesn't have an output buffer. But this
was happening when requesting the verification of an unsupported algorithm
whose output size is larger than the maximum supported MAC size, e.g.
HMAC-SHA-512 when building with only SHA-256 support. Arrange to return
PSA_ERROR_NOT_SUPPORTED instead.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>