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Supply actual key bits to PSA_MAC_LENGTH during MAC setup

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Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
This commit is contained in:
Steven Cooreman 2021-05-10 11:13:41 +02:00
parent 9621f444a7
commit a6474de2ac
1 changed files with 5 additions and 5 deletions
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10
library/psa_crypto.c
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@ -2333,11 +2333,11 @@ static psa_status_t psa_mac_setup( psa_mac_operation_t *operation,
operation->is_sign = is_sign; operation->is_sign = is_sign;
/* Get the output length for the algorithm and key combination. None of the /* Get the output length for the algorithm and key combination */
* currently supported algorithms have an output length dependent on actual
* key size, so setting it to a bogus value is currently OK. */
operation->mac_size = PSA_MAC_LENGTH( operation->mac_size = PSA_MAC_LENGTH(
psa_get_key_type( &attributes ), 0, alg ); psa_get_key_type( &attributes ),
psa_get_key_bits( &attributes ),
alg );
if( operation->mac_size < 4 ) if( operation->mac_size < 4 )
{ {
@ -2350,7 +2350,7 @@ static psa_status_t psa_mac_setup( psa_mac_operation_t *operation,
} }
if( operation->mac_size > PSA_MAC_LENGTH( psa_get_key_type( &attributes ), if( operation->mac_size > PSA_MAC_LENGTH( psa_get_key_type( &attributes ),
0, psa_get_key_bits( &attributes ),
PSA_ALG_FULL_LENGTH_MAC( alg ) ) ) PSA_ALG_FULL_LENGTH_MAC( alg ) ) )
{ {
/* It's impossible to "truncate" to a larger length than the full length /* It's impossible to "truncate" to a larger length than the full length