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export public key

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This commit is contained in:
Moran Peker
2018-04-03 15:30:03 +03:00
committed by itayzafrir
parent a0655c3501
commit dd4ea38d58
3 changed files with 61 additions and 1 deletions
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51
library/psa_crypto.c
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@ -521,6 +521,57 @@ psa_status_t psa_export_key(psa_key_slot_t key,
}
psa_status_t psa_export_public_key(psa_key_slot_t key,
uint8_t *data,
size_t data_size,
size_t *data_length)
{
key_slot_t *slot;
psa_status_t status;
if( key == 0 || key > MBEDTLS_PSA_KEY_SLOT_COUNT )
return( PSA_ERROR_EMPTY_SLOT );
status = psa_get_key_slot( key, &slot );
if( status != PSA_SUCCESS)
return( status );
if( slot->type == PSA_KEY_TYPE_NONE )
return( PSA_ERROR_EMPTY_SLOT );
if( !(PSA_KEY_TYPE_IS_PUBLIC_KEY( slot->type ) || PSA_KEY_TYPE_IS_KEYPAIR(slot->type)) )
return( PSA_ERROR_INVALID_ARGUMENT );
#if defined(MBEDTLS_PK_WRITE_C)
if( slot->type == PSA_KEY_TYPE_RSA_PUBLIC_KEY ||
slot->type == PSA_KEY_TYPE_RSA_KEYPAIR ||
PSA_KEY_TYPE_IS_ECC( slot->type ) )
{
mbedtls_pk_context pk;
int ret;
mbedtls_pk_init( &pk );
if( slot->type == PSA_KEY_TYPE_RSA_PUBLIC_KEY ||
slot->type == PSA_KEY_TYPE_RSA_KEYPAIR )
{
pk.pk_info = &mbedtls_rsa_info;
pk.pk_ctx = slot->data.rsa;
}
else
{
pk.pk_info = &mbedtls_eckey_info;
pk.pk_ctx = slot->data.ecp;
}
ret = mbedtls_pk_write_pubkey_der( &pk, data, data_size );
if( ret < 0 )
return( mbedtls_to_psa_error( ret ) );
*data_length = ret;
return( PSA_SUCCESS );
}
#endif /* defined(MBEDTLS_PK_WRITE_C) */
/* This shouldn't happen in the reference implementation, but
it is valid for a special-purpose implementation to omit
support for exporting certain key types. */
return( PSA_ERROR_NOT_SUPPORTED );
}
/****************************************************************/
/* Message digests */