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149 lines
4.5 KiB
149 lines
4.5 KiB
/* ==================================================================== |
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* Copyright (c) 2011 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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*/ |
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#include <openssl/opensslconf.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <openssl/engine.h> |
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#include <openssl/rand.h> |
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#include <openssl/err.h> |
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#if (defined(__i386) || defined(__i386__) || defined(_M_IX86) || \ |
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defined(__x86_64) || defined(__x86_64__) || \ |
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defined(_M_AMD64) || defined (_M_X64)) && defined(OPENSSL_CPUID_OBJ) |
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size_t OPENSSL_ia32_rdrand(void); |
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static int get_random_bytes(unsigned char *buf, int num) |
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{ |
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size_t rnd; |
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while (num >= (int)sizeof(size_t)) { |
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if ((rnd = OPENSSL_ia32_rdrand()) == 0) |
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return 0; |
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*((size_t *)buf) = rnd; |
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buf += sizeof(size_t); |
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num -= sizeof(size_t); |
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} |
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if (num) { |
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if ((rnd = OPENSSL_ia32_rdrand()) == 0) |
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return 0; |
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memcpy(buf, &rnd, num); |
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} |
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return 1; |
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} |
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static int random_status(void) |
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{ |
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return 1; |
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} |
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static RAND_METHOD rdrand_meth = { |
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NULL, /* seed */ |
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get_random_bytes, |
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NULL, /* cleanup */ |
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NULL, /* add */ |
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get_random_bytes, |
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random_status, |
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}; |
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static int rdrand_init(ENGINE *e) |
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{ |
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return 1; |
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} |
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static const char *engine_e_rdrand_id = "rdrand"; |
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static const char *engine_e_rdrand_name = "Intel RDRAND engine"; |
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static int bind_helper(ENGINE *e) |
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{ |
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if (!ENGINE_set_id(e, engine_e_rdrand_id) || |
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!ENGINE_set_name(e, engine_e_rdrand_name) || |
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!ENGINE_set_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL) || |
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!ENGINE_set_init_function(e, rdrand_init) || |
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!ENGINE_set_RAND(e, &rdrand_meth)) |
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return 0; |
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return 1; |
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} |
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static ENGINE *ENGINE_rdrand(void) |
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{ |
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ENGINE *ret = ENGINE_new(); |
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if (!ret) |
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return NULL; |
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if (!bind_helper(ret)) { |
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ENGINE_free(ret); |
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return NULL; |
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} |
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return ret; |
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} |
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void ENGINE_load_rdrand(void) |
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{ |
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extern unsigned int OPENSSL_ia32cap_P[]; |
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if (OPENSSL_ia32cap_P[1] & (1 << (62 - 32))) { |
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ENGINE *toadd = ENGINE_rdrand(); |
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if (!toadd) |
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return; |
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ENGINE_add(toadd); |
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ENGINE_free(toadd); |
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ERR_clear_error(); |
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} |
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} |
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#else |
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void ENGINE_load_rdrand(void) |
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{ |
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} |
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#endif
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