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Use a public macro for AEAD tag length variations

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Avoid depending on the encoding of algorithms inside psa_crypto.c.
This commit is contained in:
Gilles Peskine 2018-10-17 18:29:17 +02:00
parent 7fa99d90dd
commit 57fbdb1939
1 changed files with 3 additions and 3 deletions
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6
library/psa_crypto.c
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@ -1225,7 +1225,7 @@ static const mbedtls_cipher_info_t *mbedtls_cipher_info_from_psa(
mbedtls_cipher_id_t cipher_id_tmp;
if( PSA_ALG_IS_AEAD( alg ) )
alg &= ~PSA_ALG_AEAD_TAG_LENGTH_MASK;
alg = PSA_ALG_AEAD_WITH_TAG_LENGTH( alg, 0 );
if( PSA_ALG_IS_CIPHER( alg ) || PSA_ALG_IS_AEAD( alg ) )
{
@ -1249,10 +1249,10 @@ static const mbedtls_cipher_info_t *mbedtls_cipher_info_from_psa(
case PSA_ALG_CBC_PKCS7:
mode = MBEDTLS_MODE_CBC;
break;
case PSA_ALG_CCM & ~PSA_ALG_AEAD_TAG_LENGTH_MASK:
case PSA_ALG_AEAD_WITH_TAG_LENGTH( PSA_ALG_CCM, 0 ):
mode = MBEDTLS_MODE_CCM;
break;
case PSA_ALG_GCM & ~PSA_ALG_AEAD_TAG_LENGTH_MASK:
case PSA_ALG_AEAD_WITH_TAG_LENGTH( PSA_ALG_GCM, 0 ):
mode = MBEDTLS_MODE_GCM;
break;
default: