lib/libcrypto/libblowfish/blowfish.h

   1 /* crypto/bf/blowfish.h */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #ifndef HEADER_BLOWFISH_H
  60 #define HEADER_BLOWFISH_H
  61
  62 #ifdef  __cplusplus
  63 extern "C" {
  64 #endif
  65
  66 #ifdef NO_BF
  67 #error BF is disabled.
  68 #endif
  69
  70 #define BF_ENCRYPT      1
  71 #define BF_DECRYPT      0
  72
  73 /*
  74  * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
  75  * ! BF_LONG has to be at least 32 bits wide. If it's wider, then !
  76  * ! BF_LONG_LOG2 has to be defined along.                        !
  77  * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
  78  */
  79
  80 #if defined(WIN16) || defined(__LP32__)
  81 #define BF_LONG unsigned long
  82 #elif defined(_CRAY) || defined(__ILP64__)
  83 #define BF_LONG unsigned long
  84 #define BF_LONG_LOG2 3
  85 #endif
  86 /*
  87  * _CRAY note. I could declare short, but I have no idea what impact
  88  * does it have on performance on none-T3E machines. I could declare
  89  * int, but at least on C90 sizeof(int) can be chosen at compile time.
  90  * So I've chosen long...
  91  *                                      <appro@fy.chalmers.se>
  92  */
  93
  94 /* des.h-like hack <jjo-ipsec@mendoza.gov.ar> */
  95 #ifndef BF_LONG
  96 #ifdef __KERNEL__
  97 #include <linux/types.h>
  98 #else
  99 #include <sys/types.h>
 100 #endif
 101 #define BF_LONG u_int32_t
 102 #endif
 103
 104 #define BF_ROUNDS       16
 105 #define BF_BLOCK        8
 106
 107 typedef struct bf_key_st
 108         {
 109         BF_LONG P[BF_ROUNDS+2];
 110         BF_LONG S[4*256];
 111         } BF_KEY;
 112
 113
 114 void BF_set_key(BF_KEY *key, int len, const unsigned char *data);
 115
 116 void BF_encrypt(BF_LONG *data,const BF_KEY *key);
 117 void BF_decrypt(BF_LONG *data,const BF_KEY *key);
 118
 119 void BF_ecb_encrypt(const unsigned char *in, unsigned char *out,
 120         const BF_KEY *key, int enc);
 121 void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
 122         const BF_KEY *schedule, unsigned char *ivec, int enc);
 123 void BF_cfb64_encrypt(const unsigned char *in, unsigned char *out, long length,
 124         const BF_KEY *schedule, unsigned char *ivec, int *num, int enc);
 125 void BF_ofb64_encrypt(const unsigned char *in, unsigned char *out, long length,
 126         const BF_KEY *schedule, unsigned char *ivec, int *num);
 127 const char *BF_options(void);
 128
 129 #ifdef  __cplusplus
 130 }
 131 #endif
 132
 133 #endif