149 lines
4.5 KiB
C
149 lines
4.5 KiB
C
/* ====================================================================
|
|
* Copyright (c) 2011 The OpenSSL Project. 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. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* licensing@OpenSSL.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED 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 OpenSSL PROJECT OR
|
|
* ITS 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 <openssl/opensslconf.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <openssl/engine.h>
|
|
#include <openssl/rand.h>
|
|
#include <openssl/err.h>
|
|
|
|
#if (defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
|
|
defined(__x86_64) || defined(__x86_64__) || \
|
|
defined(_M_AMD64) || defined (_M_X64)) && defined(OPENSSL_CPUID_OBJ)
|
|
|
|
size_t OPENSSL_ia32_rdrand(void);
|
|
|
|
static int get_random_bytes(unsigned char *buf, int num)
|
|
{
|
|
size_t rnd;
|
|
|
|
while (num >= (int)sizeof(size_t)) {
|
|
if ((rnd = OPENSSL_ia32_rdrand()) == 0)
|
|
return 0;
|
|
|
|
*((size_t *)buf) = rnd;
|
|
buf += sizeof(size_t);
|
|
num -= sizeof(size_t);
|
|
}
|
|
if (num) {
|
|
if ((rnd = OPENSSL_ia32_rdrand()) == 0)
|
|
return 0;
|
|
|
|
memcpy(buf, &rnd, num);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int random_status(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static RAND_METHOD rdrand_meth = {
|
|
NULL, /* seed */
|
|
get_random_bytes,
|
|
NULL, /* cleanup */
|
|
NULL, /* add */
|
|
get_random_bytes,
|
|
random_status,
|
|
};
|
|
|
|
static int rdrand_init(ENGINE *e)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static const char *engine_e_rdrand_id = "rdrand";
|
|
static const char *engine_e_rdrand_name = "Intel RDRAND engine";
|
|
|
|
static int bind_helper(ENGINE *e)
|
|
{
|
|
if (!ENGINE_set_id(e, engine_e_rdrand_id) ||
|
|
!ENGINE_set_name(e, engine_e_rdrand_name) ||
|
|
!ENGINE_set_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL) ||
|
|
!ENGINE_set_init_function(e, rdrand_init) ||
|
|
!ENGINE_set_RAND(e, &rdrand_meth))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static ENGINE *ENGINE_rdrand(void)
|
|
{
|
|
ENGINE *ret = ENGINE_new();
|
|
if (!ret)
|
|
return NULL;
|
|
if (!bind_helper(ret)) {
|
|
ENGINE_free(ret);
|
|
return NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void ENGINE_load_rdrand(void)
|
|
{
|
|
extern unsigned int OPENSSL_ia32cap_P[];
|
|
|
|
if (OPENSSL_ia32cap_P[1] & (1 << (62 - 32))) {
|
|
ENGINE *toadd = ENGINE_rdrand();
|
|
if (!toadd)
|
|
return;
|
|
ENGINE_add(toadd);
|
|
ENGINE_free(toadd);
|
|
ERR_clear_error();
|
|
}
|
|
}
|
|
#else
|
|
void ENGINE_load_rdrand(void)
|
|
{
|
|
}
|
|
#endif
|