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Use multipart PSA key derivation API

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This commit is contained in:
k-stachowiak 2019-08-17 10:30:28 +02:00
parent b2d61e3742
commit 81053a5584
1 changed files with 57 additions and 11 deletions
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68
library/ssl_tls.c
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@ -689,6 +689,52 @@ exit:
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
#if defined(MBEDTLS_USE_PSA_CRYPTO)
static psa_status_t setup_psa_key_derivation( psa_key_derivation_operation_t* derivation,
psa_key_handle_t slot,
psa_algorithm_t alg,
const unsigned char* seed, size_t seed_length,
const unsigned char* label, size_t label_length,
size_t capacity )
{
psa_status_t status;
status = psa_key_derivation_setup( derivation, alg );
if( status != PSA_SUCCESS )
return( status );
if( PSA_ALG_IS_TLS12_PRF( alg ) || PSA_ALG_IS_TLS12_PSK_TO_MS( alg ) )
{
status = psa_key_derivation_input_bytes( derivation,
PSA_KEY_DERIVATION_INPUT_SEED,
seed, seed_length );
if( status != PSA_SUCCESS )
return( status );
status = psa_key_derivation_input_key( derivation,
PSA_KEY_DERIVATION_INPUT_SECRET,
slot );
if( status != PSA_SUCCESS )
return( status );
status = psa_key_derivation_input_bytes( derivation,
PSA_KEY_DERIVATION_INPUT_LABEL,
label, label_length );
if( status != PSA_SUCCESS )
return( status );
}
else
{
return( PSA_ERROR_NOT_SUPPORTED );
}
status = psa_key_derivation_set_capacity( derivation, capacity );
if( status != PSA_SUCCESS )
return( status );
return( PSA_SUCCESS );
}
static int tls_prf_generic( mbedtls_md_type_t md_type,
const unsigned char *secret, size_t slen,
const char *label,
@ -716,12 +762,12 @@ static int tls_prf_generic( mbedtls_md_type_t md_type,
if( status != PSA_SUCCESS )
return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
status = psa_key_derivation( &derivation,
master_slot, alg,
random, rlen,
(unsigned char const *) label,
(size_t) strlen( label ),
dlen );
status = setup_psa_key_derivation( &derivation,
master_slot, alg,
random, rlen,
(unsigned char const *) label,
(size_t) strlen( label ),
dlen );
if( status != PSA_SUCCESS )
{
psa_key_derivation_abort( &derivation );
@ -1695,11 +1741,11 @@ static int ssl_compute_master( mbedtls_ssl_handshake_params *handshake,
else
alg = PSA_ALG_TLS12_PSK_TO_MS(PSA_ALG_SHA_256);
status = psa_key_derivation( &derivation, psk, alg,
salt, salt_len,
(unsigned char const *) lbl,
(size_t) strlen( lbl ),
master_secret_len );
status = setup_psa_key_derivation( &derivation, psk, alg,
salt, salt_len,
(unsigned char const *) lbl,
(size_t) strlen( lbl ),
master_secret_len );
if( status != PSA_SUCCESS )
{
psa_key_derivation_abort( &derivation );