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Use helper macro for (deterministic) ECDSA

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- centralizes decision making about which version to use when
- avoids nested #ifs in pk_ecc_set_key()

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
This commit is contained in:
Manuel Pégourié-Gonnard
2023-07-25 12:06:55 +02:00
parent dcd98fffab
commit 116175c5d7
3 changed files with 11 additions and 14 deletions
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7
library/pkparse.c
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@@ -504,14 +504,11 @@ static int pk_ecc_set_key(mbedtls_pk_context *pk,
psa_set_key_type(&attributes, PSA_KEY_TYPE_ECC_KEY_PAIR(pk->ec_family));
psa_set_key_algorithm(&attributes, PSA_ALG_ECDH);
psa_key_usage_t flags = PSA_KEY_USAGE_EXPORT | PSA_KEY_USAGE_DERIVE;
/* Montgomery allows only ECDH, others ECDSA too */
if (pk->ec_family != PSA_ECC_FAMILY_MONTGOMERY) {
flags |= PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_SIGN_MESSAGE;
#if defined(MBEDTLS_ECDSA_DETERMINISTIC)
psa_set_key_enrollment_algorithm(&attributes,
PSA_ALG_DETERMINISTIC_ECDSA(PSA_ALG_ANY_HASH));
#else
psa_set_key_enrollment_algorithm(&attributes, PSA_ALG_ECDSA(PSA_ALG_ANY_HASH));
#endif
MBEDTLS_PK_PSA_ALG_ECDSA_MAYBE_DET(PSA_ALG_ANY_HASH));
}
psa_set_key_usage_flags(&attributes, flags);