include/openssl/blowfish.h

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #ifndef HEADER_BLOWFISH_H
  59 # define HEADER_BLOWFISH_H
  60
  61 # include <openssl/e_os2.h>
  62
  63 #ifdef  __cplusplus
  64 extern "C" {
  65 #endif
  66
  67 # ifdef OPENSSL_NO_BF
  68 #  error BF is disabled.
  69 # endif
  70
  71 # define BF_ENCRYPT      1
  72 # define BF_DECRYPT      0
  73
  74 /*-
  75  * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
  76  * ! BF_LONG has to be at least 32 bits wide.                     !
  77  * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
  78  */
  79 # define BF_LONG unsigned int
  80
  81 # define BF_ROUNDS       16
  82 # define BF_BLOCK        8
  83
  84 typedef struct bf_key_st {
  85     BF_LONG P[BF_ROUNDS + 2];
  86     BF_LONG S[4 * 256];
  87 } BF_KEY;
  88
  89 void BF_set_key(BF_KEY *key, int len, const unsigned char *data);
  90
  91 void BF_encrypt(BF_LONG *data, const BF_KEY *key);
  92 void BF_decrypt(BF_LONG *data, const BF_KEY *key);
  93
  94 void BF_ecb_encrypt(const unsigned char *in, unsigned char *out,
  95                     const BF_KEY *key, int enc);
  96 void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
  97                     const BF_KEY *schedule, unsigned char *ivec, int enc);
  98 void BF_cfb64_encrypt(const unsigned char *in, unsigned char *out,
  99                       long length, const BF_KEY *schedule,
 100                       unsigned char *ivec, int *num, int enc);
 101 void BF_ofb64_encrypt(const unsigned char *in, unsigned char *out,
 102                       long length, const BF_KEY *schedule,
 103                       unsigned char *ivec, int *num);
 104 const char *BF_options(void);
 105
 106 #ifdef  __cplusplus
 107 }
 108 #endif
 109
 110 #endif