/* Copyright (c) 2018-2020 ARM Limited * * 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 "trng_api.h" #include "crypto.h" #include "mbed_toolchain.h" MBED_WEAK void trng_init(trng_t *obj) { (void)(obj); } MBED_WEAK void trng_free(trng_t *obj) { (void)(obj); } MBED_WEAK int trng_get_bytes(trng_t *obj, uint8_t *output, size_t length, size_t *output_length) { ((void)(obj)); if (output == NULL || output_length == NULL) { return -1; } psa_status_t status = psa_crypto_init(); if (status != PSA_SUCCESS) { return -1; } status = psa_generate_random(output, length); if (status != PSA_SUCCESS) { return -1; } *output_length = length; return 0; }