crypto/o_init.c

   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
  64 extern  void int_ERR_lib_init(void);
  65 # ifndef OPENSSL_NO_ENGINE
  66 extern  void int_EVP_MD_init_engine_callbacks(void );
  67 extern  void int_EVP_CIPHER_init_engine_callbacks(void );
  68 extern  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
  76 void 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
  98 int 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