ossl-rand-cc.c   [plain text]


/*
 * Copyright (c) 2011-12 Apple Inc. All Rights Reserved.
 *
 * @APPLE_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. 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
 * limitations under the License.
 *
 * @APPLE_LICENSE_HEADER_END@
 */

/*
 * Copyright (c) 2010 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 *
 * Portions Copyright (c) 2010 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "ossl-config.h"


#include <stdio.h>
#include <stdlib.h>

#include "ossl-rand.h"
#include "ossl-randi.h"

#if defined(__APPLE_PRIVATE__) && !defined(__APPLE_TARGET_EMBEDDED__)

#include <CommonCrypto/CommonRandomSPI.h>

/*
 * Unix /dev/random
 */
static void
cc_seed(const void *indata, int size)
{
}


static int
cc_bytes(unsigned char *outdata, int size)
{
	/*
	 * XXX until rdar://problem/8174874 is fixed CCRandomCopyBytes()
	 * won't work for sshd.
	 */
	if (CCRandomCopyBytes(kCCRandomDefault, outdata, size) != kCCSuccess) {
		return (0);
	}
	return (1);
}


static void
cc_cleanup(void)
{
}


static void
cc_add(const void *indata, int size, double entropi)
{
}


static int
cc_pseudorand(unsigned char *outdata, int size)
{
	return (cc_bytes(outdata, size));
}


static int
cc_status(void)
{
	return (1);
}


const RAND_METHOD ossl_rand_cc_method =
{
	.seed		= cc_seed,
	.bytes		= cc_bytes,
	.cleanup	= cc_cleanup,
	.add		= cc_add,
	.pseudorand	= cc_pseudorand,
	.status		= cc_status
};

#endif /* __APPLE_PRIVATE__ */

const RAND_METHOD *
RAND_cc_method(void)
{
#if defined(__APPLE_PRIVATE__) && !defined(__APPLE_TARGET_EMBEDDED__)
	return (&ossl_rand_cc_method);

#else
	return (NULL);
#endif
}