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Add label input for psa_tls12_prf_input

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This commit is contained in:
Janos Follath 2019-06-13 09:15:47 +01:00
parent 8155054e28
commit 63028dd906
1 changed files with 21 additions and 0 deletions
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21
library/psa_crypto.c
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@ -4808,6 +4808,25 @@ static psa_status_t psa_tls12_prf_set_key( psa_tls12_prf_key_derivation_t *prf,
return( PSA_SUCCESS );
}
static psa_status_t psa_tls12_prf_set_label( psa_tls12_prf_key_derivation_t *prf,
const uint8_t *data,
size_t data_length )
{
if( prf->state != TLS12_PRF_STATE_KEY_SET )
return( PSA_ERROR_BAD_STATE );
prf->label = mbedtls_calloc( 1, data_length );
if( prf->label == NULL )
return( PSA_ERROR_INSUFFICIENT_MEMORY );
memcpy( prf->label, data, data_length );
prf->label_length = data_length;
prf->state = TLS12_PRF_STATE_LABEL_SET;
return( PSA_SUCCESS );
}
static psa_status_t psa_tls12_prf_input( psa_tls12_prf_key_derivation_t *prf,
psa_algorithm_t hash_alg,
psa_key_derivation_step_t step,
@ -4820,6 +4839,8 @@ static psa_status_t psa_tls12_prf_input( psa_tls12_prf_key_derivation_t *prf,
return( psa_tls12_prf_set_seed( prf, data, data_length ) );
case PSA_KEY_DERIVATION_INPUT_SECRET:
return( psa_tls12_prf_set_key( prf, hash_alg, data, data_length ) );
case PSA_KEY_DERIVATION_INPUT_LABEL:
return( psa_tls12_prf_set_label( prf, data, data_length ) );
default:
return( PSA_ERROR_INVALID_ARGUMENT );
}