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/**
* WinPR: Windows Portable Runtime
*
* Copyright 2015 Marc-Andre Moreau <marcandre.moreau@gmail.com>
*
* 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 <winpr/config.h>
#include <winpr/crt.h>
#include <winpr/crypto.h>
#ifdef WITH_OPENSSL
#include <openssl/crypto.h>
#include <openssl/rand.h>
#endif
#ifdef WITH_MBEDTLS
#include <mbedtls/md.h>
#include <mbedtls/entropy.h>
#ifdef MBEDTLS_HAVEGE_C
#include <mbedtls/havege.h>
#endif
#include <mbedtls/hmac_drbg.h>
#endif
int winpr_RAND(void* output, size_t len)
{
#if defined(WITH_OPENSSL)
if (len > INT_MAX)
return -1;
if (RAND_bytes(output, (int)len) != 1)
return -1;
#elif defined(WITH_MBEDTLS)
#if defined(MBEDTLS_HAVEGE_C)
mbedtls_havege_state hs;
mbedtls_havege_init(&hs);
if (mbedtls_havege_random(&hs, output, len) != 0)
return -1;
mbedtls_havege_free(&hs);
#else
int status;
mbedtls_entropy_context entropy;
mbedtls_hmac_drbg_context hmac_drbg;
const mbedtls_md_info_t* md_info;
mbedtls_entropy_init(&entropy);
mbedtls_hmac_drbg_init(&hmac_drbg);
md_info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
if ((status = mbedtls_hmac_drbg_seed(&hmac_drbg, md_info, mbedtls_entropy_func, &entropy, NULL,
0)) != 0)
return -1;
status = mbedtls_hmac_drbg_random(&hmac_drbg, output, len);
mbedtls_hmac_drbg_free(&hmac_drbg);
mbedtls_entropy_free(&entropy);
if (status != 0)
return -1;
#endif
#endif
return 0;
}
int winpr_RAND_pseudo(void* output, size_t len)
{
return winpr_RAND(output, len);
}
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