/src/openssl/crypto/engine/eng_rdrand.c

Source (jump to first uncovered line)
/* ====================================================================
 * 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

Line	Count	Source (jump to first uncovered line)
1		/* ====================================================================
2		* Copyright (c) 2011 The OpenSSL Project. All rights reserved.
3		*
4		* Redistribution and use in source and binary forms, with or without
5		* modification, are permitted provided that the following conditions
6		* are met:
7		*
8		* 1. Redistributions of source code must retain the above copyright
9		* notice, this list of conditions and the following disclaimer.
10		*
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
14		* distribution.
15		*
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/)"
20		*
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.
25		*
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.
29		*
30		* 6. Redistributions of any form whatsoever must retain the following
31		* acknowledgment:
32		* "This product includes software developed by the OpenSSL Project
33		* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
34		*
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		* ====================================================================
48		*/
49
50		#include <openssl/opensslconf.h>
51
52		#include <stdio.h>
53		#include <string.h>
54		#include <openssl/engine.h>
55		#include <openssl/rand.h>
56		#include <openssl/err.h>
57
58		#if (defined(__i386) \|\| defined(__i386__) \|\| defined(_M_IX86) \|\| \
59		defined(__x86_64) \|\| defined(__x86_64__) \|\| \
60		defined(_M_AMD64) \|\| defined (_M_X64)) && defined(OPENSSL_CPUID_OBJ)
61
62		size_t OPENSSL_ia32_rdrand(void);
63
64		static int get_random_bytes(unsigned char *buf, int num)
65	0	{
66	0	size_t rnd;
67
68	0	while (num >= (int)sizeof(size_t)) {
69	0	if ((rnd = OPENSSL_ia32_rdrand()) == 0)
70	0	return 0;
71
72	0	((size_t )buf) = rnd;
73	0	buf += sizeof(size_t);
74	0	num -= sizeof(size_t);
75	0	}
76	0	if (num) {
77	0	if ((rnd = OPENSSL_ia32_rdrand()) == 0)
78	0	return 0;
79
80	0	memcpy(buf, &rnd, num);
81	0	}
82
83	0	return 1;
84	0	}
85
86		static int random_status(void)
87	0	{
88	0	return 1;
89	0	}
90
91		static RAND_METHOD rdrand_meth = {
92		NULL, /* seed */
93		get_random_bytes,
94		NULL, /* cleanup */
95		NULL, /* add */
96		get_random_bytes,
97		random_status,
98		};
99
100		static int rdrand_init(ENGINE *e)
101	0	{
102	0	return 1;
103	0	}
104
105		static const char *engine_e_rdrand_id = "rdrand";
106		static const char *engine_e_rdrand_name = "Intel RDRAND engine";
107
108		static int bind_helper(ENGINE *e)
109	19	{
110	19	if (!ENGINE_set_id(e, engine_e_rdrand_id) \|\|
111	19	!ENGINE_set_name(e, engine_e_rdrand_name) \|\|
112	19	!ENGINE_set_flags(e, ENGINE_FLAGS_NO_REGISTER_ALL) \|\|
113	19	!ENGINE_set_init_function(e, rdrand_init) \|\|
114	19	!ENGINE_set_RAND(e, &rdrand_meth))
115	0	return 0;
116
117	19	return 1;
118	19	}
119
120		static ENGINE *ENGINE_rdrand(void)
121	19	{
122	19	ENGINE *ret = ENGINE_new();
123	19	if (!ret)
124	0	return NULL;
125	19	if (!bind_helper(ret)) {
126	0	ENGINE_free(ret);
127	0	return NULL;
128	0	}
129	19	return ret;
130	19	}
131
132		void ENGINE_load_rdrand(void)
133	19	{
134	19	extern unsigned int OPENSSL_ia32cap_P[];
135
136	19	if (OPENSSL_ia32cap_P[1] & (1 << (62 - 32))) {
137	19	ENGINE *toadd = ENGINE_rdrand();
138	19	if (!toadd)
139	0	return;
140	19	ENGINE_add(toadd);
141	19	ENGINE_free(toadd);
142	19	ERR_clear_error();
143	19	}
144	19	}
145		#else
146		void ENGINE_load_rdrand(void)
147		{
148		}
149		#endif

Coverage Report

Created: 2022-11-30 06:20