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/* Copyright (c) 2023, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#if !defined(_DEFAULT_SOURCE)
#define _DEFAULT_SOURCE // Needed for getentropy on musl and glibc
#endif
#include <CCryptoBoringSSL_rand.h>
#include "../fipsmodule/rand/internal.h"
#if defined(OPENSSL_RAND_GETENTROPY)
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#if defined(OPENSSL_MACOS) || defined(OPENSSL_FUCHSIA)
#include <sys/random.h>
#endif
// CRYPTO_sysrand puts |requested| random bytes into |out|.
void CRYPTO_sysrand(uint8_t *out, size_t requested) {
while (requested > 0) {
// |getentropy| can only request 256 bytes at a time.
size_t todo = requested <= 256 ? requested : 256;
if (getentropy(out, todo) != 0) {
perror("getentropy() failed");
abort();
}
out += todo;
requested -= todo;
}
}
void CRYPTO_sysrand_for_seed(uint8_t *out, size_t requested) {
CRYPTO_sysrand(out, requested);
}
#endif // OPENSSL_RAND_GETENTROPY
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