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H A Drsa.ca846630f4435a7127bdee968781e6d6eb296f5fa Fri Apr 01 15:45:55 UTC 2022 Jens Wiklander <jens.wiklander@linaro.org> libmbedtls: add fault mitigation in mbedtls_rsa_rsassa_pss_verify_ext()

Adds fault mitigation in mbedtls_rsa_rsassa_pss_verify_ext() by using
the macro FTMN_CALLEE_DONE_MEMCMP() instead of memcmp() when checking
that the hash in the RSA signature is matching the expected value.

FTMN_CALLEE_DONE_MEMCMP() saves on success the result in a thread local
storage if fault mitigations was enabled when the function was called.

Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>