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/** \file fake_external_rng_for_test.c
*
* \brief Helper functions to test PSA crypto functionality.
*/
/*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <test/fake_external_rng_for_test.h>
#if defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
#include <test/random.h>
#include <psa/crypto.h>
static int test_insecure_external_rng_enabled = 0;
void mbedtls_test_enable_insecure_external_rng( void )
{
test_insecure_external_rng_enabled = 1;
}
void mbedtls_test_disable_insecure_external_rng( void )
{
test_insecure_external_rng_enabled = 0;
}
psa_status_t mbedtls_psa_external_get_random(
mbedtls_psa_external_random_context_t *context,
uint8_t *output, size_t output_size, size_t *output_length )
{
(void) context;
if( !test_insecure_external_rng_enabled )
return( PSA_ERROR_INSUFFICIENT_ENTROPY );
/* This implementation is for test purposes only!
* Use the libc non-cryptographic random generator. */
mbedtls_test_rnd_std_rand( NULL, output, output_size );
*output_length = output_size;
return( PSA_SUCCESS );
}
#endif /* MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG */