o_init.c revision 248272 
1/* o_init.c */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5/* ====================================================================
6 * Copyright (c) 2007 The OpenSSL Project.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in
17 *    the documentation and/or other materials provided with the
18 *    distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 *    software must display the following acknowledgment:
22 *    "This product includes software developed by the OpenSSL Project
23 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 *    endorse or promote products derived from this software without
27 *    prior written permission. For written permission, please contact
28 *    openssl-core@openssl.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 *    nor may "OpenSSL" appear in their names without prior written
32 *    permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 *    acknowledgment:
36 *    "This product includes software developed by the OpenSSL Project
37 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com).  This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <e_os.h>
60#include <openssl/err.h>
61
62/* Internal only functions: only ever used here */
63#ifdef OPENSSL_FIPS
64extern	void int_ERR_lib_init(void);
65# ifndef OPENSSL_NO_ENGINE
66extern	void int_EVP_MD_init_engine_callbacks(void );
67extern	void int_EVP_CIPHER_init_engine_callbacks(void );
68extern	void int_RAND_init_engine_callbacks(void );
69# endif
70#endif
71
72/* Perform any essential OpenSSL initialization operations.
73 * Currently only sets FIPS callbacks
74 */
75
76void OPENSSL_init(void)
77	{
78#ifdef OPENSSL_FIPS
79	static int done = 0;
80	if (!done)
81		{
82		int_ERR_lib_init();
83#ifdef CRYPTO_MDEBUG
84		CRYPTO_malloc_debug_init();
85#endif
86#ifndef OPENSSL_NO_ENGINE
87		int_EVP_MD_init_engine_callbacks();
88		int_EVP_CIPHER_init_engine_callbacks();
89		int_RAND_init_engine_callbacks();
90#endif
91		done = 1;
92		}
93#endif
94	}
95
96#ifdef OPENSSL_FIPS
97
98int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len)
99	{
100	size_t i;
101	const unsigned char *a = in_a;
102	const unsigned char *b = in_b;
103	unsigned char x = 0;
104
105	for (i = 0; i < len; i++)
106		x |= a[i] ^ b[i];
107
108	return x;
109	}
110#endif
111