crypto/openssl-0.9.7d/crypto/rc5/rc5.h

   1 /* crypto/rc5/rc5.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_RC5_H
  60 #define HEADER_RC5_H
  61
  62 #ifdef  __cplusplus
  63 extern "C" {
  64 #endif
  65
  66 #ifdef OPENSSL_NO_RC5
  67 #error RC5 is disabled.
  68 #endif
  69
  70 #define RC5_ENCRYPT     1
  71 #define RC5_DECRYPT     0
  72
  73 /* 32 bit.  For Alpha, things may get weird */
  74 #define RC5_32_INT unsigned long
  75
  76 #define RC5_32_BLOCK            8
  77 #define RC5_32_KEY_LENGTH       16 /* This is a default, max is 255 */
  78
  79 /* This are the only values supported.  Tweak the code if you want more
  80  * The most supported modes will be
  81  * RC5-32/12/16
  82  * RC5-32/16/8
  83  */
  84 #define RC5_8_ROUNDS    8
  85 #define RC5_12_ROUNDS   12
  86 #define RC5_16_ROUNDS   16
  87
  88 typedef struct rc5_key_st
  89         {
  90         /* Number of rounds */
  91         int rounds;
  92         RC5_32_INT data[2*(RC5_16_ROUNDS+1)];
  93         } RC5_32_KEY;
  94
  95
  96 void RC5_32_set_key(RC5_32_KEY *key, int len, const unsigned char *data,
  97         int rounds);
  98 void RC5_32_ecb_encrypt(const unsigned char *in,unsigned char *out,RC5_32_KEY *key,
  99         int enc);
 100 void RC5_32_encrypt(unsigned long *data,RC5_32_KEY *key);
 101 void RC5_32_decrypt(unsigned long *data,RC5_32_KEY *key);
 102 void RC5_32_cbc_encrypt(const unsigned char *in, unsigned char *out,
 103                         long length, RC5_32_KEY *ks, unsigned char *iv,
 104                         int enc);
 105 void RC5_32_cfb64_encrypt(const unsigned char *in, unsigned char *out,
 106                           long length, RC5_32_KEY *schedule,
 107                           unsigned char *ivec, int *num, int enc);
 108 void RC5_32_ofb64_encrypt(const unsigned char *in, unsigned char *out,
 109                           long length, RC5_32_KEY *schedule,
 110                           unsigned char *ivec, int *num);
 111
 112 #ifdef  __cplusplus
 113 }
 114 #endif
 115
 116 #endif