crypto/rc2/rc2_locl.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 #undef c2l
  59 #define c2l(c,l)        (l =((unsigned long)(*((c)++)))    , \
  60                          l|=((unsigned long)(*((c)++)))<< 8L, \
  61                          l|=((unsigned long)(*((c)++)))<<16L, \
  62                          l|=((unsigned long)(*((c)++)))<<24L)
  63
  64 /* NOTE - c is not incremented as per c2l */
  65 #undef c2ln
  66 #define c2ln(c,l1,l2,n) { \
  67                         c+=n; \
  68                         l1=l2=0; \
  69                         switch (n) { \
  70                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
  71                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
  72                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
  73                         case 5: l2|=((unsigned long)(*(--(c))));     \
  74                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
  75                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
  76                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
  77                         case 1: l1|=((unsigned long)(*(--(c))));     \
  78                                 } \
  79                         }
  80
  81 #undef l2c
  82 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
  83                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  84                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
  85                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
  86
  87 /* NOTE - c is not incremented as per l2c */
  88 #undef l2cn
  89 #define l2cn(l1,l2,c,n) { \
  90                         c+=n; \
  91                         switch (n) { \
  92                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
  93                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
  94                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
  95                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
  96                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
  97                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
  98                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
  99                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
 100                                 } \
 101                         }
 102
 103 /* NOTE - c is not incremented as per n2l */
 104 #define n2ln(c,l1,l2,n) { \
 105                         c+=n; \
 106                         l1=l2=0; \
 107                         switch (n) { \
 108                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
 109                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
 110                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
 111                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
 112                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
 113                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
 114                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
 115                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
 116                                 } \
 117                         }
 118
 119 /* NOTE - c is not incremented as per l2n */
 120 #define l2nn(l1,l2,c,n) { \
 121                         c+=n; \
 122                         switch (n) { \
 123                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
 124                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
 125                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
 126                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
 127                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
 128                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
 129                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
 130                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
 131                                 } \
 132                         }
 133
 134 #undef n2l
 135 #define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
 136                          l|=((unsigned long)(*((c)++)))<<16L, \
 137                          l|=((unsigned long)(*((c)++)))<< 8L, \
 138                          l|=((unsigned long)(*((c)++))))
 139
 140 #undef l2n
 141 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 142                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 143                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 144                          *((c)++)=(unsigned char)(((l)     )&0xff))
 145
 146 #define C_RC2(n) \
 147         t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff; \
 148         x0=(t<<1)|(t>>15); \
 149         t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff; \
 150         x1=(t<<2)|(t>>14); \
 151         t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff; \
 152         x2=(t<<3)|(t>>13); \
 153         t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff; \
 154         x3=(t<<5)|(t>>11);