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03bede0cc8
Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com> (Merged from https://github.com/openssl/openssl/pull/13226)
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/*
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* Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "crypto/rand.h"
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#include "crypto/rand_pool.h"
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#include <openssl/core_dispatch.h>
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#include <openssl/err.h>
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size_t ossl_rand_get_entropy(ossl_unused OSSL_CORE_HANDLE *handle,
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unsigned char **pout, int entropy,
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size_t min_len, size_t max_len)
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{
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size_t ret = 0;
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size_t entropy_available;
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RAND_POOL *pool;
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pool = rand_pool_new(entropy, 1, min_len, max_len);
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if (pool == NULL) {
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ERR_raise(ERR_LIB_RAND, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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/* Get entropy by polling system entropy sources. */
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entropy_available = ossl_pool_acquire_entropy(pool);
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if (entropy_available > 0) {
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ret = rand_pool_length(pool);
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*pout = rand_pool_detach(pool);
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}
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rand_pool_free(pool);
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return ret;
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}
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void ossl_rand_cleanup_entropy(ossl_unused OSSL_CORE_HANDLE *handle,
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unsigned char *buf, size_t len)
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{
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OPENSSL_secure_clear_free(buf, len);
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}
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size_t ossl_rand_get_nonce(ossl_unused OSSL_CORE_HANDLE *handle,
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unsigned char **pout, size_t min_len, size_t max_len,
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const void *salt, size_t salt_len)
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{
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size_t ret = 0;
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RAND_POOL *pool;
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pool = rand_pool_new(0, 0, min_len, max_len);
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if (pool == NULL) {
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ERR_raise(ERR_LIB_RAND, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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if (!ossl_pool_add_nonce_data(pool))
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goto err;
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if (salt != NULL && !rand_pool_add(pool, salt, salt_len, 0))
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goto err;
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ret = rand_pool_length(pool);
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*pout = rand_pool_detach(pool);
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err:
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rand_pool_free(pool);
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return ret;
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}
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void ossl_rand_cleanup_nonce(ossl_unused OSSL_CORE_HANDLE *handle,
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unsigned char *buf, size_t len)
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{
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OPENSSL_clear_free(buf, len);
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}
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