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5b68158154
Most tools used for compliance and SBOM generation use SPDX identifiers This change brings us a step closer to an easy SBOM generation. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/****************************************************************************
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* apps/crypto/openssl_mbedtls_wrapper/mbedtls/rand.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <mbedtls/ctr_drbg.h>
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#include <mbedtls/entropy.h>
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#include <openssl/rand.h>
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#include <string.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/* RAND_bytes() generates num random bytes using a
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* cryptographically secure pseudo random generator
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* (CSPRNG) and stores them in buf.
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*
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* @param buf the buffer to contains the generated random data
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* @param num the length of the generated random data
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* @return return 1 on success, other value on failure
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*/
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int RAND_bytes(unsigned char *buf, int num)
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{
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int ret;
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mbedtls_entropy_context entropy;
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mbedtls_ctr_drbg_context ctr_drbg;
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const char *keymaster_personalization =
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"softkeymaster_random_generator";
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mbedtls_entropy_init(&entropy);
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mbedtls_ctr_drbg_init(&ctr_drbg);
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ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func,
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&entropy, (const unsigned char *)keymaster_personalization,
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strlen(keymaster_personalization)) == 0
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&& mbedtls_ctr_drbg_random(&ctr_drbg, buf, num) == 0 ? 1 : 0;
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mbedtls_ctr_drbg_free(&ctr_drbg);
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mbedtls_entropy_free(&entropy);
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return ret;
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}
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/* RAND_add method using to seed the random generator
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* This function also do nothing on android
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* https://github.com/google/boringssl/blob/
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* 94b477cea5057d9372984a311aba9276f737f748/
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* crypto/rand_extra/rand_extra.c#L39
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*/
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void RAND_add(const void *buf, int num, double randomness)
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{
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}
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