1 /* ====================================================================
2 * Copyright (c) 2011 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
16 * 3. All advertising materials mentioning features or use of this
17 * software must display the following acknowledgment:
18 * "This product includes software developed by the OpenSSL Project
19 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 * endorse or promote products derived from this software without
23 * prior written permission. For written permission, please contact
24 * licensing@OpenSSL.org.
26 * 5. Products derived from this software may not be called "OpenSSL"
27 * nor may "OpenSSL" appear in their names without prior written
28 * permission of the OpenSSL Project.
30 * 6. Redistributions of any form whatsoever must retain the following
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 * ====================================================================
50 #include <openssl/opensslconf.h>
54 #include <internal/engine.h>
55 #include <openssl/rand.h>
56 #include <openssl/err.h>
57 #include <openssl/crypto.h>
59 #if (defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
60 defined(__x86_64) || defined(__x86_64__) || \
61 defined(_M_AMD64) || defined (_M_X64)) && defined(OPENSSL_CPUID_OBJ)
63 size_t OPENSSL_ia32_rdrand(void);
65 static int get_random_bytes(unsigned char *buf
, int num
)
69 while (num
>= (int)sizeof(size_t)) {
70 if ((rnd
= OPENSSL_ia32_rdrand()) == 0)
73 *((size_t *)buf
) = rnd
;
74 buf
+= sizeof(size_t);
75 num
-= sizeof(size_t);
78 if ((rnd
= OPENSSL_ia32_rdrand()) == 0)
81 memcpy(buf
, &rnd
, num
);
87 static int random_status(void)
92 static RAND_METHOD rdrand_meth
= {
101 static int rdrand_init(ENGINE
*e
)
106 static const char *engine_e_rdrand_id
= "rdrand";
107 static const char *engine_e_rdrand_name
= "Intel RDRAND engine";
109 static int bind_helper(ENGINE
*e
)
111 if (!ENGINE_set_id(e
, engine_e_rdrand_id
) ||
112 !ENGINE_set_name(e
, engine_e_rdrand_name
) ||
113 !ENGINE_set_flags(e
, ENGINE_FLAGS_NO_REGISTER_ALL
) ||
114 !ENGINE_set_init_function(e
, rdrand_init
) ||
115 !ENGINE_set_RAND(e
, &rdrand_meth
))
121 static ENGINE
*ENGINE_rdrand(void)
123 ENGINE
*ret
= ENGINE_new();
126 if (!bind_helper(ret
)) {
133 void engine_load_rdrand_internal(void)
135 extern unsigned int OPENSSL_ia32cap_P
[];
137 if (OPENSSL_ia32cap_P
[1] & (1 << (62 - 32))) {
138 ENGINE
*toadd
= ENGINE_rdrand();
147 void engine_load_rdrand_internal(void)