o_init.c revision 296465 
1/* o_init.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 * project.
5 */
6/* ====================================================================
7 * Copyright (c) 2007 The OpenSSL Project.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in
18 *    the documentation and/or other materials provided with the
19 *    distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 *    software must display the following acknowledgment:
23 *    "This product includes software developed by the OpenSSL Project
24 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 *    endorse or promote products derived from this software without
28 *    prior written permission. For written permission, please contact
29 *    openssl-core@openssl.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 *    nor may "OpenSSL" appear in their names without prior written
33 *    permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 *    acknowledgment:
37 *    "This product includes software developed by the OpenSSL Project
38 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com).  This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include <e_os.h>
61#include <openssl/err.h>
62
63/* Internal only functions: only ever used here */
64#ifdef OPENSSL_FIPS
65extern void int_ERR_lib_init(void);
66# ifndef OPENSSL_NO_ENGINE
67extern void int_EVP_MD_init_engine_callbacks(void);
68extern void int_EVP_CIPHER_init_engine_callbacks(void);
69extern void int_RAND_init_engine_callbacks(void);
70# endif
71#endif
72
73/*
74 * Perform any essential OpenSSL initialization operations. Currently only
75 * sets FIPS callbacks
76 */
77
78void OPENSSL_init(void)
79{
80#ifdef OPENSSL_FIPS
81    static int done = 0;
82    if (!done) {
83        int_ERR_lib_init();
84# ifdef CRYPTO_MDEBUG
85        CRYPTO_malloc_debug_init();
86# endif
87# ifndef OPENSSL_NO_ENGINE
88        int_EVP_MD_init_engine_callbacks();
89        int_EVP_CIPHER_init_engine_callbacks();
90        int_RAND_init_engine_callbacks();
91# endif
92        done = 1;
93    }
94#endif
95}
96
97#ifdef OPENSSL_FIPS
98
99int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len)
100{
101    size_t i;
102    const unsigned char *a = in_a;
103    const unsigned char *b = in_b;
104    unsigned char x = 0;
105
106    for (i = 0; i < len; i++)
107        x |= a[i] ^ b[i];
108
109    return x;
110}
111#endif
112