0ef1717155
Some checks failed
Basic Checks / license-check (push) Has been cancelled
Basic Checks / include-check (push) Has been cancelled
Basic Checks / style-check (push) Has been cancelled
Basic Checks / docs-check (push) Has been cancelled
Basic Checks / python-tests (push) Has been cancelled
Basic Checks / pin-validation (push) Has been cancelled
Basic Checks / cmake-checks (push) Has been cancelled
Basic Checks / frozen-tools-check (push) Has been cancelled
Publish or Update docker image for head of branch / prepare-tags (push) Has been cancelled
Release or update docker image for a released mbed-os version / prepare-tags (push) Has been cancelled
Publish or Update docker image for head of branch / build-container (push) Has been cancelled
Publish or Update docker image for head of branch / test-container (linux/amd64) (push) Has been cancelled
Publish or Update docker image for head of branch / test-container (linux/arm64) (push) Has been cancelled
Publish or Update docker image for head of branch / deploy-container (push) Has been cancelled
Release or update docker image for a released mbed-os version / build-container (push) Has been cancelled
Release or update docker image for a released mbed-os version / test-container (linux/amd64) (push) Has been cancelled
Release or update docker image for a released mbed-os version / test-container (linux/arm64) (push) Has been cancelled
Release or update docker image for a released mbed-os version / deploy-container (push) Has been cancelled
Prune temporary docker images / prune-images (push) Has been cancelled
91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/*
|
|
* trng.c
|
|
*
|
|
* Copyright (C) 2017, Arm Limited, All Rights Reserved
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#if DEVICE_TRNG
|
|
|
|
#include <string.h>
|
|
#include "trng_api.h"
|
|
#include "mbedtls/platform.h"
|
|
|
|
extern mbedtls_platform_context plat_ctx;
|
|
static CRYS_RND_WorkBuff_t rndWorkBuff = { { 0 } };
|
|
|
|
/* Implementation that should never be optimized out by the compiler */
|
|
static void mbedtls_zeroize( void *v, size_t n ) {
|
|
volatile unsigned char *p = (unsigned char*)v;
|
|
while( n-- ) *p++ = 0;
|
|
}
|
|
|
|
CRYSError_t RNG_PLAT_SetUserRngParameters(
|
|
CRYS_RND_State_t *pRndState,
|
|
CRYS_RND_Params_t *pTrngParams);
|
|
|
|
CRYSError_t LLF_RND_GetTrngSource(
|
|
CRYS_RND_State_t *rndState_ptr,
|
|
CRYS_RND_Params_t *trngParams_ptr,
|
|
SaSiBool_t isContinued,
|
|
uint32_t *entropySize_ptr,
|
|
uint32_t **sourceOut_ptr_ptr,
|
|
uint32_t *sourceOutSize_ptr,
|
|
uint32_t *rndWorkBuff_ptr);
|
|
|
|
|
|
void trng_init(trng_t *obj)
|
|
{
|
|
RNG_PLAT_SetUserRngParameters(&plat_ctx.platform_impl_ctx.rndState, obj);
|
|
}
|
|
|
|
void trng_free(trng_t *obj)
|
|
{
|
|
(void)obj;
|
|
}
|
|
|
|
|
|
int trng_get_bytes(trng_t *obj, uint8_t *output, size_t length, size_t *outputLength)
|
|
{
|
|
(void)obj;
|
|
int ret;
|
|
uint32_t entropySizeBits;
|
|
uint32_t *entrSource_ptr;
|
|
uint32_t actualLength;
|
|
|
|
ret = LLF_RND_GetTrngSource(
|
|
&plat_ctx.platform_impl_ctx.rndState , /*in/out*/
|
|
obj, /*in/out*/
|
|
0, /*in*/
|
|
&entropySizeBits, /*in/out*/
|
|
&entrSource_ptr, /*out*/
|
|
&actualLength, /*out*/
|
|
(uint32_t*)&rndWorkBuff.crysRndWorkBuff /*in*/);
|
|
if ( ret != 0 )
|
|
return -1;
|
|
|
|
if ( length < actualLength )
|
|
actualLength = length;
|
|
|
|
*outputLength = actualLength;
|
|
|
|
memcpy( output, entrSource_ptr + CRYS_RND_TRNG_SRC_INNER_OFFSET_WORDS, *outputLength );
|
|
mbedtls_zeroize( entrSource_ptr + CRYS_RND_TRNG_SRC_INNER_OFFSET_WORDS, *outputLength );
|
|
return 0;
|
|
}
|
|
|
|
#endif //DEVICE_TRNG
|