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psa_hmac_start: simplify key_length logic in hash-the-key case

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Gilles Peskine 2018-06-11 17:38:53 +02:00 committed by itayzafrir
parent e1bc6800cc
commit c102e3ce4b
1 changed files with 1 additions and 4 deletions
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5
library/psa_crypto.c
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@ -1069,7 +1069,6 @@ static int psa_hmac_start( psa_mac_operation_t *operation,
unsigned char ipad[PSA_CRYPTO_MD_BLOCK_SIZE];
unsigned char *opad = operation->ctx.hmac.hmac_ctx;
size_t i;
size_t sum_size = MBEDTLS_MD_MAX_SIZE;
size_t block_size =
PSA_HASH_BLOCK_SIZE( ( PSA_ALG_HMAC_HASH( alg ) ) );
unsigned int digest_size =
@ -1099,11 +1098,9 @@ static int psa_hmac_start( psa_mac_operation_t *operation,
if( status != PSA_SUCCESS )
return( status );
status = psa_hash_finish( &operation->ctx.hmac.hash_ctx,
sum, sum_size, &sum_size);
sum, sizeof( sum ), &key_length );
if( status != PSA_SUCCESS )
return( status );
key_length = sum_size;
key_ptr = sum;
}