crypto/cast/cast_lcl.h

   1 /* crypto/cast/cast_lcl.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 #ifdef WIN32
  60 #include <stdlib.h>
  61 #endif
  62
  63 #undef c2l
  64 #define c2l(c,l)        (l =((unsigned long)(*((c)++)))    , \
  65                          l|=((unsigned long)(*((c)++)))<< 8L, \
  66                          l|=((unsigned long)(*((c)++)))<<16L, \
  67                          l|=((unsigned long)(*((c)++)))<<24L)
  68
  69 /* NOTE - c is not incremented as per c2l */
  70 #undef c2ln
  71 #define c2ln(c,l1,l2,n) { \
  72                         c+=n; \
  73                         l1=l2=0; \
  74                         switch (n) { \
  75                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
  76                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
  77                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
  78                         case 5: l2|=((unsigned long)(*(--(c))));     \
  79                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
  80                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
  81                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
  82                         case 1: l1|=((unsigned long)(*(--(c))));     \
  83                                 } \
  84                         }
  85
  86 #undef l2c
  87 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
  88                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  89                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
  90                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
  91
  92 /* NOTE - c is not incremented as per l2c */
  93 #undef l2cn
  94 #define l2cn(l1,l2,c,n) { \
  95                         c+=n; \
  96                         switch (n) { \
  97                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
  98                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
  99                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
 100                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
 101                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
 102                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
 103                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
 104                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
 105                                 } \
 106                         }
 107
 108 /* NOTE - c is not incremented as per n2l */
 109 #define n2ln(c,l1,l2,n) { \
 110                         c+=n; \
 111                         l1=l2=0; \
 112                         switch (n) { \
 113                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
 114                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
 115                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
 116                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
 117                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
 118                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
 119                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
 120                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
 121                                 } \
 122                         }
 123
 124 /* NOTE - c is not incremented as per l2n */
 125 #define l2nn(l1,l2,c,n) { \
 126                         c+=n; \
 127                         switch (n) { \
 128                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
 129                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
 130                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
 131                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
 132                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
 133                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
 134                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
 135                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
 136                                 } \
 137                         }
 138
 139 #undef n2l
 140 #define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
 141                          l|=((unsigned long)(*((c)++)))<<16L, \
 142                          l|=((unsigned long)(*((c)++)))<< 8L, \
 143                          l|=((unsigned long)(*((c)++))))
 144
 145 #undef l2n
 146 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 147                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 148                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 149                          *((c)++)=(unsigned char)(((l)     )&0xff))
 150
 151 #if defined(WIN32)
 152 #define ROTL(a,n)     (_lrotl(a,n))
 153 #else
 154 #define ROTL(a,n)     ((((a)<<(n))&0xffffffffL)|((a)>>(32-(n))))
 155 #endif
 156
 157 #define C_M    0x3fc
 158 #define C_0    22L
 159 #define C_1    14L
 160 #define C_2     6L
 161 #define C_3     2L /* left shift */
 162
 163 /* The rotate has an extra 16 added to it to help the x86 asm */
 164 #if defined(CAST_PTR)
 165 #define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 166         { \
 167         int i; \
 168         t=(key[n*2] OP1 R)&0xffffffffL; \
 169         i=key[n*2+1]; \
 170         t=ROTL(t,i); \
 171         L^= (((((*(CAST_LONG *)((unsigned char *) \
 172                         CAST_S_table0+((t>>C_2)&C_M)) OP2 \
 173                 *(CAST_LONG *)((unsigned char *) \
 174                         CAST_S_table1+((t<<C_3)&C_M)))&0xffffffffL) OP3 \
 175                 *(CAST_LONG *)((unsigned char *) \
 176                         CAST_S_table2+((t>>C_0)&C_M)))&0xffffffffL) OP1 \
 177                 *(CAST_LONG *)((unsigned char *) \
 178                         CAST_S_table3+((t>>C_1)&C_M)))&0xffffffffL; \
 179         }
 180 #elif defined(CAST_PTR2)
 181 #define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 182         { \
 183         int i; \
 184         CAST_LONG u,v,w; \
 185         w=(key[n*2] OP1 R)&0xffffffffL; \
 186         i=key[n*2+1]; \
 187         w=ROTL(w,i); \
 188         u=w>>C_2; \
 189         v=w<<C_3; \
 190         u&=C_M; \
 191         v&=C_M; \
 192         t= *(CAST_LONG *)((unsigned char *)CAST_S_table0+u); \
 193         u=w>>C_0; \
 194         t=(t OP2 *(CAST_LONG *)((unsigned char *)CAST_S_table1+v))&0xffffffffL;\
 195         v=w>>C_1; \
 196         u&=C_M; \
 197         v&=C_M; \
 198         t=(t OP3 *(CAST_LONG *)((unsigned char *)CAST_S_table2+u)&0xffffffffL);\
 199         t=(t OP1 *(CAST_LONG *)((unsigned char *)CAST_S_table3+v)&0xffffffffL);\
 200         L^=(t&0xffffffff); \
 201         }
 202 #else
 203 #define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 204         { \
 205         CAST_LONG a,b,c,d; \
 206         t=(key[n*2] OP1 R)&0xffffffff; \
 207         t=ROTL(t,(key[n*2+1])); \
 208         a=CAST_S_table0[(t>> 8)&0xff]; \
 209         b=CAST_S_table1[(t    )&0xff]; \
 210         c=CAST_S_table2[(t>>24)&0xff]; \
 211         d=CAST_S_table3[(t>>16)&0xff]; \
 212         L^=(((((a OP2 b)&0xffffffffL) OP3 c)&0xffffffffL) OP1 d)&0xffffffffL; \
 213         }
 214 #endif
 215
 216 extern CAST_LONG CAST_S_table0[256];
 217 extern CAST_LONG CAST_S_table1[256];
 218 extern CAST_LONG CAST_S_table2[256];
 219 extern CAST_LONG CAST_S_table3[256];
 220 extern CAST_LONG CAST_S_table4[256];
 221 extern CAST_LONG CAST_S_table5[256];
 222 extern CAST_LONG CAST_S_table6[256];
 223 extern CAST_LONG CAST_S_table7[256];
 224