crypto/libressl/crypto/cast/cast_lcl.h

   1 /* $OpenBSD: cast_lcl.h,v 1.10 2014/06/12 15:49:28 deraadt Exp $ */
   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 #undef c2l
  60 #define c2l(c,l)        (l =((unsigned long)(*((c)++)))    , \
  61                          l|=((unsigned long)(*((c)++)))<< 8L, \
  62                          l|=((unsigned long)(*((c)++)))<<16L, \
  63                          l|=((unsigned long)(*((c)++)))<<24L)
  64
  65 /* NOTE - c is not incremented as per c2l */
  66 #undef c2ln
  67 #define c2ln(c,l1,l2,n) { \
  68                         c+=n; \
  69                         l1=l2=0; \
  70                         switch (n) { \
  71                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
  72                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
  73                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
  74                         case 5: l2|=((unsigned long)(*(--(c))));     \
  75                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
  76                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
  77                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
  78                         case 1: l1|=((unsigned long)(*(--(c))));     \
  79                                 } \
  80                         }
  81
  82 #undef l2c
  83 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
  84                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  85                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
  86                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
  87
  88 /* NOTE - c is not incremented as per l2c */
  89 #undef l2cn
  90 #define l2cn(l1,l2,c,n) { \
  91                         c+=n; \
  92                         switch (n) { \
  93                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
  94                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
  95                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
  96                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
  97                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
  98                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
  99                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
 100                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
 101                                 } \
 102                         }
 103
 104 /* NOTE - c is not incremented as per n2l */
 105 #define n2ln(c,l1,l2,n) { \
 106                         c+=n; \
 107                         l1=l2=0; \
 108                         switch (n) { \
 109                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
 110                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
 111                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
 112                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
 113                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
 114                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
 115                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
 116                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
 117                                 } \
 118                         }
 119
 120 /* NOTE - c is not incremented as per l2n */
 121 #define l2nn(l1,l2,c,n) { \
 122                         c+=n; \
 123                         switch (n) { \
 124                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
 125                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
 126                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
 127                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
 128                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
 129                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
 130                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
 131                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
 132                                 } \
 133                         }
 134
 135 #undef n2l
 136 #define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
 137                          l|=((unsigned long)(*((c)++)))<<16L, \
 138                          l|=((unsigned long)(*((c)++)))<< 8L, \
 139                          l|=((unsigned long)(*((c)++))))
 140
 141 #undef l2n
 142 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 143                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 144                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 145                          *((c)++)=(unsigned char)(((l)     )&0xff))
 146
 147 /* only invoked with 0 <= n <= 31 */
 148 #define ROTL(a,n)     ((((a)<<(n))&0xffffffffL)|((a)>>(32-(n))))
 149
 150 #define C_M    0x3fc
 151 #define C_0    22L
 152 #define C_1    14L
 153 #define C_2     6L
 154 #define C_3     2L /* left shift */
 155
 156 /* The rotate has an extra 16 added to it to help the x86 asm */
 157 #if defined(CAST_PTR)
 158 #define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 159         { \
 160         int i; \
 161         t=(key[n*2] OP1 R)&0xffffffffL; \
 162         i=key[n*2+1]; \
 163         t=ROTL(t,i); \
 164         L^= (((((*(CAST_LONG *)((unsigned char *) \
 165                         CAST_S_table0+((t>>C_2)&C_M)) OP2 \
 166                 *(CAST_LONG *)((unsigned char *) \
 167                         CAST_S_table1+((t<<C_3)&C_M)))&0xffffffffL) OP3 \
 168                 *(CAST_LONG *)((unsigned char *) \
 169                         CAST_S_table2+((t>>C_0)&C_M)))&0xffffffffL) OP1 \
 170                 *(CAST_LONG *)((unsigned char *) \
 171                         CAST_S_table3+((t>>C_1)&C_M)))&0xffffffffL; \
 172         }
 173 #elif defined(CAST_PTR2)
 174 #define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 175         { \
 176         int i; \
 177         CAST_LONG u,v,w; \
 178         w=(key[n*2] OP1 R)&0xffffffffL; \
 179         i=key[n*2+1]; \
 180         w=ROTL(w,i); \
 181         u=w>>C_2; \
 182         v=w<<C_3; \
 183         u&=C_M; \
 184         v&=C_M; \
 185         t= *(CAST_LONG *)((unsigned char *)CAST_S_table0+u); \
 186         u=w>>C_0; \
 187         t=(t OP2 *(CAST_LONG *)((unsigned char *)CAST_S_table1+v))&0xffffffffL;\
 188         v=w>>C_1; \
 189         u&=C_M; \
 190         v&=C_M; \
 191         t=(t OP3 *(CAST_LONG *)((unsigned char *)CAST_S_table2+u)&0xffffffffL);\
 192         t=(t OP1 *(CAST_LONG *)((unsigned char *)CAST_S_table3+v)&0xffffffffL);\
 193         L^=(t&0xffffffff); \
 194         }
 195 #else
 196 #define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 197         { \
 198         CAST_LONG a,b,c,d; \
 199         t=(key[n*2] OP1 R)&0xffffffff; \
 200         t=ROTL(t,(key[n*2+1])); \
 201         a=CAST_S_table0[(t>> 8)&0xff]; \
 202         b=CAST_S_table1[(t    )&0xff]; \
 203         c=CAST_S_table2[(t>>24)&0xff]; \
 204         d=CAST_S_table3[(t>>16)&0xff]; \
 205         L^=(((((a OP2 b)&0xffffffffL) OP3 c)&0xffffffffL) OP1 d)&0xffffffffL; \
 206         }
 207 #endif
 208
 209 extern const CAST_LONG CAST_S_table0[256];
 210 extern const CAST_LONG CAST_S_table1[256];
 211 extern const CAST_LONG CAST_S_table2[256];
 212 extern const CAST_LONG CAST_S_table3[256];
 213 extern const CAST_LONG CAST_S_table4[256];
 214 extern const CAST_LONG CAST_S_table5[256];
 215 extern const CAST_LONG CAST_S_table6[256];
 216 extern const CAST_LONG CAST_S_table7[256];