crypto/cast/cast_lcl.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 #include "e_os.h"
  59
  60 #ifdef OPENSSL_SYS_WIN32
  61 # include <stdlib.h>
  62 #endif
  63
  64 #undef c2l
  65 #define c2l(c,l)        (l =((unsigned long)(*((c)++)))    , \
  66                          l|=((unsigned long)(*((c)++)))<< 8L, \
  67                          l|=((unsigned long)(*((c)++)))<<16L, \
  68                          l|=((unsigned long)(*((c)++)))<<24L)
  69
  70 /* NOTE - c is not incremented as per c2l */
  71 #undef c2ln
  72 #define c2ln(c,l1,l2,n) { \
  73                         c+=n; \
  74                         l1=l2=0; \
  75                         switch (n) { \
  76                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
  77                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
  78                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
  79                         case 5: l2|=((unsigned long)(*(--(c))));     \
  80                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
  81                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
  82                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
  83                         case 1: l1|=((unsigned long)(*(--(c))));     \
  84                                 } \
  85                         }
  86
  87 #undef l2c
  88 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
  89                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  90                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
  91                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
  92
  93 /* NOTE - c is not incremented as per l2c */
  94 #undef l2cn
  95 #define l2cn(l1,l2,c,n) { \
  96                         c+=n; \
  97                         switch (n) { \
  98                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
  99                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
 100                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
 101                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
 102                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
 103                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
 104                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
 105                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
 106                                 } \
 107                         }
 108
 109 /* NOTE - c is not incremented as per n2l */
 110 #define n2ln(c,l1,l2,n) { \
 111                         c+=n; \
 112                         l1=l2=0; \
 113                         switch (n) { \
 114                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
 115                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
 116                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
 117                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
 118                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
 119                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
 120                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
 121                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
 122                                 } \
 123                         }
 124
 125 /* NOTE - c is not incremented as per l2n */
 126 #define l2nn(l1,l2,c,n) { \
 127                         c+=n; \
 128                         switch (n) { \
 129                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
 130                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
 131                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
 132                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
 133                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
 134                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
 135                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
 136                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
 137                                 } \
 138                         }
 139
 140 #undef n2l
 141 #define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
 142                          l|=((unsigned long)(*((c)++)))<<16L, \
 143                          l|=((unsigned long)(*((c)++)))<< 8L, \
 144                          l|=((unsigned long)(*((c)++))))
 145
 146 #undef l2n
 147 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 148                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 149                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 150                          *((c)++)=(unsigned char)(((l)     )&0xff))
 151
 152 #if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)
 153 # define ROTL(a,n)     (_lrotl(a,n))
 154 #elif defined(PEDANTIC)
 155 # define ROTL(a,n)     ((((a)<<(n))&0xffffffffL)|((a)>>((32-(n))&31)))
 156 #else
 157 # define ROTL(a,n)     ((((a)<<(n))&0xffffffffL)|((a)>>(32-(n))))
 158 #endif
 159
 160 #define C_M    0x3fc
 161 #define C_0    22L
 162 #define C_1    14L
 163 #define C_2     6L
 164 #define C_3     2L              /* left shift */
 165
 166 /* The rotate has an extra 16 added to it to help the x86 asm */
 167 #if defined(CAST_PTR)
 168 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 169         { \
 170         int i; \
 171         t=(key[n*2] OP1 R)&0xffffffffL; \
 172         i=key[n*2+1]; \
 173         t=ROTL(t,i); \
 174         L^= (((((*(CAST_LONG *)((unsigned char *) \
 175                         CAST_S_table0+((t>>C_2)&C_M)) OP2 \
 176                 *(CAST_LONG *)((unsigned char *) \
 177                         CAST_S_table1+((t<<C_3)&C_M)))&0xffffffffL) OP3 \
 178                 *(CAST_LONG *)((unsigned char *) \
 179                         CAST_S_table2+((t>>C_0)&C_M)))&0xffffffffL) OP1 \
 180                 *(CAST_LONG *)((unsigned char *) \
 181                         CAST_S_table3+((t>>C_1)&C_M)))&0xffffffffL; \
 182         }
 183 #elif defined(CAST_PTR2)
 184 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 185         { \
 186         int i; \
 187         CAST_LONG u,v,w; \
 188         w=(key[n*2] OP1 R)&0xffffffffL; \
 189         i=key[n*2+1]; \
 190         w=ROTL(w,i); \
 191         u=w>>C_2; \
 192         v=w<<C_3; \
 193         u&=C_M; \
 194         v&=C_M; \
 195         t= *(CAST_LONG *)((unsigned char *)CAST_S_table0+u); \
 196         u=w>>C_0; \
 197         t=(t OP2 *(CAST_LONG *)((unsigned char *)CAST_S_table1+v))&0xffffffffL;\
 198         v=w>>C_1; \
 199         u&=C_M; \
 200         v&=C_M; \
 201         t=(t OP3 *(CAST_LONG *)((unsigned char *)CAST_S_table2+u)&0xffffffffL);\
 202         t=(t OP1 *(CAST_LONG *)((unsigned char *)CAST_S_table3+v)&0xffffffffL);\
 203         L^=(t&0xffffffff); \
 204         }
 205 #else
 206 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 207         { \
 208         CAST_LONG a,b,c,d; \
 209         t=(key[n*2] OP1 R)&0xffffffff; \
 210         t=ROTL(t,(key[n*2+1])); \
 211         a=CAST_S_table0[(t>> 8)&0xff]; \
 212         b=CAST_S_table1[(t    )&0xff]; \
 213         c=CAST_S_table2[(t>>24)&0xff]; \
 214         d=CAST_S_table3[(t>>16)&0xff]; \
 215         L^=(((((a OP2 b)&0xffffffffL) OP3 c)&0xffffffffL) OP1 d)&0xffffffffL; \
 216         }
 217 #endif
 218
 219 extern const CAST_LONG CAST_S_table0[256];
 220 extern const CAST_LONG CAST_S_table1[256];
 221 extern const CAST_LONG CAST_S_table2[256];
 222 extern const CAST_LONG CAST_S_table3[256];
 223 extern const CAST_LONG CAST_S_table4[256];
 224 extern const CAST_LONG CAST_S_table5[256];
 225 extern const CAST_LONG CAST_S_table6[256];
 226 extern const CAST_LONG CAST_S_table7[256];