yuzu/mbedtls
1
0
Fork 0
mirror of https://github.com/yuzu-emu/mbedtls.git synced 2025-02-24 08:46:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

Rework mbedlts group id to PSA curve conversion

Browse source 
Don't rely on the PSA curve identifier determining the key size, in
preparation for removing that.
This commit is contained in:
Gilles Peskine 2019-12-12 16:58:00 +01:00
parent 2eea95cb5d
commit c7ef5b3f45
1 changed files with 24 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
library/psa_crypto.c
View file

@ -375,35 +375,49 @@ static inline int psa_key_slot_is_external( const psa_key_slot_t *slot )
#endif /* MBEDTLS_PSA_CRYPTO_SE_C */
#if defined(MBEDTLS_ECP_C)
static psa_ecc_curve_t mbedtls_ecc_group_to_psa( mbedtls_ecp_group_id grpid )
static psa_ecc_curve_t mbedtls_ecc_group_to_psa( mbedtls_ecp_group_id grpid,
size_t *bits )
{
switch( grpid )
{
case MBEDTLS_ECP_DP_SECP192R1:
*bits = 192;
return( PSA_ECC_CURVE_SECP192R1 );
case MBEDTLS_ECP_DP_SECP224R1:
*bits = 224;
return( PSA_ECC_CURVE_SECP224R1 );
case MBEDTLS_ECP_DP_SECP256R1:
*bits = 256;
return( PSA_ECC_CURVE_SECP256R1 );
case MBEDTLS_ECP_DP_SECP384R1:
*bits = 384;
return( PSA_ECC_CURVE_SECP384R1 );
case MBEDTLS_ECP_DP_SECP521R1:
*bits = 521;
return( PSA_ECC_CURVE_SECP521R1 );
case MBEDTLS_ECP_DP_BP256R1:
*bits = 256;
return( PSA_ECC_CURVE_BRAINPOOL_P256R1 );
case MBEDTLS_ECP_DP_BP384R1:
*bits = 384;
return( PSA_ECC_CURVE_BRAINPOOL_P384R1 );
case MBEDTLS_ECP_DP_BP512R1:
*bits = 512;
return( PSA_ECC_CURVE_BRAINPOOL_P512R1 );
case MBEDTLS_ECP_DP_CURVE25519:
*bits = 255;
return( PSA_ECC_CURVE_CURVE25519 );
case MBEDTLS_ECP_DP_SECP192K1:
*bits = 192;
return( PSA_ECC_CURVE_SECP192K1 );
case MBEDTLS_ECP_DP_SECP224K1:
*bits = 224;
return( PSA_ECC_CURVE_SECP224K1 );
case MBEDTLS_ECP_DP_SECP256K1:
*bits = 256;
return( PSA_ECC_CURVE_SECP256K1 );
case MBEDTLS_ECP_DP_CURVE448:
*bits = 448;
return( PSA_ECC_CURVE_CURVE448 );
default:
return( 0 );
@ -5251,10 +5265,11 @@ static psa_status_t psa_key_agreement_ecdh( const uint8_t *peer_key,
mbedtls_ecp_keypair *their_key = NULL;
mbedtls_ecdh_context ecdh;
psa_status_t status;
size_t bits = 0;
psa_ecc_curve_t curve = mbedtls_ecc_group_to_psa( our_key->grp.id, &bits );
mbedtls_ecdh_init( &ecdh );
status = psa_import_ec_public_key(
mbedtls_ecc_group_to_psa( our_key->grp.id ),
status = psa_import_ec_public_key( curve,
peer_key, peer_key_length,
&their_key );
if( status != PSA_SUCCESS )
@ -5275,6 +5290,10 @@ static psa_status_t psa_key_agreement_ecdh( const uint8_t *peer_key,
shared_secret, shared_secret_size,
mbedtls_ctr_drbg_random,
&global_data.ctr_drbg ) );
if( status != PSA_SUCCESS )
goto exit;
if( PSA_BITS_TO_BYTES( bits ) != *shared_secret_length )
status = PSA_ERROR_CORRUPTION_DETECTED;
exit:
mbedtls_ecdh_free( &ecdh );