/* mbed Microcontroller Library * Copyright (c) 2016 ARM Limited * * 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. */ #if defined(DEVICE_TRNG) || defined(FEATURE_PSA) #include "hal/trng_api.h" #include "platform/SingletonPtr.h" #include "platform/PlatformMutex.h" SingletonPtr<PlatformMutex> mbedtls_mutex; extern "C" int mbedtls_hardware_poll( void *data, unsigned char *output, size_t len, size_t *olen ) { #if defined(DEVICE_TRNG) trng_t trng_obj; mbedtls_mutex->lock(); trng_init(&trng_obj); int ret = trng_get_bytes(&trng_obj, output, len, olen); trng_free(&trng_obj); mbedtls_mutex->unlock(); return ret; #else /* defined(FEATURE_PSA) */ mbedtls_mutex->lock(); int ret = trng_get_bytes(NULL, output, len, olen); mbedtls_mutex->unlock(); return ret; #endif } #endif