xnu-3789.31.2.tar.gz

[apple/xnu.git] / libkern / crypto / corecrypto_rand.c

/*
 * Copyright (c) 2016 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
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 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

#include <libkern/crypto/crypto_internal.h>
#include <corecrypto/ccrng.h>
#include <libkern/crypto/rand.h>

int
cc_rand_generate(void *out, size_t outlen)
{
	struct ccrng_state *rng_state = NULL;
	int error = -1;

	if (g_crypto_funcs) {
		rng_state = g_crypto_funcs->ccrng_fn(&error);
		if (rng_state != NULL) {
			error = ccrng_generate(rng_state, outlen, out);
		}
	}

	return error;
}