crypto/cast/cast_lcl.h

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include "e_os.h"
  11
  12 #ifdef OPENSSL_SYS_WIN32
  13 # include <stdlib.h>
  14 #endif
  15
  16 #undef c2l
  17 #define c2l(c,l)        (l =((unsigned long)(*((c)++)))    , \
  18                          l|=((unsigned long)(*((c)++)))<< 8L, \
  19                          l|=((unsigned long)(*((c)++)))<<16L, \
  20                          l|=((unsigned long)(*((c)++)))<<24L)
  21
  22 /* NOTE - c is not incremented as per c2l */
  23 #undef c2ln
  24 #define c2ln(c,l1,l2,n) { \
  25                         c+=n; \
  26                         l1=l2=0; \
  27                         switch (n) { \
  28                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
  29                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
  30                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
  31                         case 5: l2|=((unsigned long)(*(--(c))));     \
  32                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
  33                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
  34                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
  35                         case 1: l1|=((unsigned long)(*(--(c))));     \
  36                                 } \
  37                         }
  38
  39 #undef l2c
  40 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
  41                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  42                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
  43                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
  44
  45 /* NOTE - c is not incremented as per l2c */
  46 #undef l2cn
  47 #define l2cn(l1,l2,c,n) { \
  48                         c+=n; \
  49                         switch (n) { \
  50                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
  51                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
  52                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
  53                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
  54                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
  55                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
  56                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
  57                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
  58                                 } \
  59                         }
  60
  61 /* NOTE - c is not incremented as per n2l */
  62 #define n2ln(c,l1,l2,n) { \
  63                         c+=n; \
  64                         l1=l2=0; \
  65                         switch (n) { \
  66                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
  67                         /* fall thru */                              \
  68                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
  69                         /* fall thru */                              \
  70                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
  71                         /* fall thru */                              \
  72                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
  73                         /* fall thru */                              \
  74                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
  75                         /* fall thru */                              \
  76                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
  77                         /* fall thru */                              \
  78                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
  79                         /* fall thru */                              \
  80                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
  81                                 } \
  82                         }
  83
  84 /* NOTE - c is not incremented as per l2n */
  85 #define l2nn(l1,l2,c,n) { \
  86                         c+=n; \
  87                         switch (n) { \
  88                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
  89                         /* fall thru */                                    \
  90                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
  91                         /* fall thru */                                    \
  92                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
  93                         /* fall thru */                                    \
  94                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
  95                         /* fall thru */                                    \
  96                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
  97                         /* fall thru */                                    \
  98                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
  99                         /* fall thru */                                    \
 100                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
 101                         /* fall thru */                                    \
 102                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
 103                                 } \
 104                         }
 105
 106 #undef n2l
 107 #define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
 108                          l|=((unsigned long)(*((c)++)))<<16L, \
 109                          l|=((unsigned long)(*((c)++)))<< 8L, \
 110                          l|=((unsigned long)(*((c)++))))
 111
 112 #undef l2n
 113 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 114                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 115                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 116                          *((c)++)=(unsigned char)(((l)     )&0xff))
 117
 118 #if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)
 119 # define ROTL(a,n)     (_lrotl(a,n))
 120 #else
 121 # define ROTL(a,n)     ((((a)<<(n))&0xffffffffL)|((a)>>((32-(n))&31)))
 122 #endif
 123
 124 #define C_M    0x3fc
 125 #define C_0    22L
 126 #define C_1    14L
 127 #define C_2     6L
 128 #define C_3     2L              /* left shift */
 129
 130 /* The rotate has an extra 16 added to it to help the x86 asm */
 131 #if defined(CAST_PTR)
 132 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 133         { \
 134         int i; \
 135         t=(key[n*2] OP1 R)&0xffffffffL; \
 136         i=key[n*2+1]; \
 137         t=ROTL(t,i); \
 138         L^= (((((*(CAST_LONG *)((unsigned char *) \
 139                         CAST_S_table0+((t>>C_2)&C_M)) OP2 \
 140                 *(CAST_LONG *)((unsigned char *) \
 141                         CAST_S_table1+((t<<C_3)&C_M)))&0xffffffffL) OP3 \
 142                 *(CAST_LONG *)((unsigned char *) \
 143                         CAST_S_table2+((t>>C_0)&C_M)))&0xffffffffL) OP1 \
 144                 *(CAST_LONG *)((unsigned char *) \
 145                         CAST_S_table3+((t>>C_1)&C_M)))&0xffffffffL; \
 146         }
 147 #elif defined(CAST_PTR2)
 148 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 149         { \
 150         int i; \
 151         CAST_LONG u,v,w; \
 152         w=(key[n*2] OP1 R)&0xffffffffL; \
 153         i=key[n*2+1]; \
 154         w=ROTL(w,i); \
 155         u=w>>C_2; \
 156         v=w<<C_3; \
 157         u&=C_M; \
 158         v&=C_M; \
 159         t= *(CAST_LONG *)((unsigned char *)CAST_S_table0+u); \
 160         u=w>>C_0; \
 161         t=(t OP2 *(CAST_LONG *)((unsigned char *)CAST_S_table1+v))&0xffffffffL;\
 162         v=w>>C_1; \
 163         u&=C_M; \
 164         v&=C_M; \
 165         t=(t OP3 *(CAST_LONG *)((unsigned char *)CAST_S_table2+u)&0xffffffffL);\
 166         t=(t OP1 *(CAST_LONG *)((unsigned char *)CAST_S_table3+v)&0xffffffffL);\
 167         L^=(t&0xffffffff); \
 168         }
 169 #else
 170 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 171         { \
 172         CAST_LONG a,b,c,d; \
 173         t=(key[n*2] OP1 R)&0xffffffff; \
 174         t=ROTL(t,(key[n*2+1])); \
 175         a=CAST_S_table0[(t>> 8)&0xff]; \
 176         b=CAST_S_table1[(t    )&0xff]; \
 177         c=CAST_S_table2[(t>>24)&0xff]; \
 178         d=CAST_S_table3[(t>>16)&0xff]; \
 179         L^=(((((a OP2 b)&0xffffffffL) OP3 c)&0xffffffffL) OP1 d)&0xffffffffL; \
 180         }
 181 #endif
 182
 183 extern const CAST_LONG CAST_S_table0[256];
 184 extern const CAST_LONG CAST_S_table1[256];
 185 extern const CAST_LONG CAST_S_table2[256];
 186 extern const CAST_LONG CAST_S_table3[256];
 187 extern const CAST_LONG CAST_S_table4[256];
 188 extern const CAST_LONG CAST_S_table5[256];
 189 extern const CAST_LONG CAST_S_table6[256];
 190 extern const CAST_LONG CAST_S_table7[256];