| /* |
| * Copyright 2016 The OpenThread Authors. All Rights Reserved. |
| * |
| * 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. |
| */ |
| |
| /** |
| * @file |
| * This file implements to use hardware entropy source. |
| * uncomment MBEDTLS_ENTROPY_HARDWARE_ALT in mbedtls/mbedtls_config.h to use this. |
| */ |
| |
| #include <stddef.h> |
| |
| #include "openthread/types.h" |
| #include "openthread/platform/random.h" |
| |
| #include "mbedtls/entropy.h" |
| |
| int mbedtls_hardware_poll(void *data, unsigned char *output, size_t len, size_t *olen) |
| { |
| otError error; |
| |
| (void)data; |
| |
| error = otPlatRandomGetTrue((uint8_t *)output, (uint16_t)len); |
| |
| if (error != OT_ERROR_NONE) |
| { |
| return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED; |
| } |
| |
| if (olen != NULL) |
| { |
| *olen = len; |
| } |
| |
| return 0; |
| } |