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                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
  68                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
  69                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
  70                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
  71                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
  72                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
  73                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
  74                                 } \
  75                         }
  76
  77 /* NOTE - c is not incremented as per l2n */
  78 #define l2nn(l1,l2,c,n) { \
  79                         c+=n; \
  80                         switch (n) { \
  81                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
  82                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
  83                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
  84                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
  85                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
  86                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
  87                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
  88                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
  89                                 } \
  90                         }
  91
  92 #undef n2l
  93 #define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
  94                          l|=((unsigned long)(*((c)++)))<<16L, \
  95                          l|=((unsigned long)(*((c)++)))<< 8L, \
  96                          l|=((unsigned long)(*((c)++))))
  97
  98 #undef l2n
  99 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 100                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 101                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 102                          *((c)++)=(unsigned char)(((l)     )&0xff))
 103
 104 #if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)
 105 # define ROTL(a,n)     (_lrotl(a,n))
 106 #else
 107 # define ROTL(a,n)     ((((a)<<(n))&0xffffffffL)|((a)>>((32-(n))&31)))
 108 #endif
 109
 110 #define C_M    0x3fc
 111 #define C_0    22L
 112 #define C_1    14L
 113 #define C_2     6L
 114 #define C_3     2L              /* left shift */
 115
 116 /* The rotate has an extra 16 added to it to help the x86 asm */
 117 #if defined(CAST_PTR)
 118 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 119         { \
 120         int i; \
 121         t=(key[n*2] OP1 R)&0xffffffffL; \
 122         i=key[n*2+1]; \
 123         t=ROTL(t,i); \
 124         L^= (((((*(CAST_LONG *)((unsigned char *) \
 125                         CAST_S_table0+((t>>C_2)&C_M)) OP2 \
 126                 *(CAST_LONG *)((unsigned char *) \
 127                         CAST_S_table1+((t<<C_3)&C_M)))&0xffffffffL) OP3 \
 128                 *(CAST_LONG *)((unsigned char *) \
 129                         CAST_S_table2+((t>>C_0)&C_M)))&0xffffffffL) OP1 \
 130                 *(CAST_LONG *)((unsigned char *) \
 131                         CAST_S_table3+((t>>C_1)&C_M)))&0xffffffffL; \
 132         }
 133 #elif defined(CAST_PTR2)
 134 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 135         { \
 136         int i; \
 137         CAST_LONG u,v,w; \
 138         w=(key[n*2] OP1 R)&0xffffffffL; \
 139         i=key[n*2+1]; \
 140         w=ROTL(w,i); \
 141         u=w>>C_2; \
 142         v=w<<C_3; \
 143         u&=C_M; \
 144         v&=C_M; \
 145         t= *(CAST_LONG *)((unsigned char *)CAST_S_table0+u); \
 146         u=w>>C_0; \
 147         t=(t OP2 *(CAST_LONG *)((unsigned char *)CAST_S_table1+v))&0xffffffffL;\
 148         v=w>>C_1; \
 149         u&=C_M; \
 150         v&=C_M; \
 151         t=(t OP3 *(CAST_LONG *)((unsigned char *)CAST_S_table2+u)&0xffffffffL);\
 152         t=(t OP1 *(CAST_LONG *)((unsigned char *)CAST_S_table3+v)&0xffffffffL);\
 153         L^=(t&0xffffffff); \
 154         }
 155 #else
 156 # define E_CAST(n,key,L,R,OP1,OP2,OP3) \
 157         { \
 158         CAST_LONG a,b,c,d; \
 159         t=(key[n*2] OP1 R)&0xffffffff; \
 160         t=ROTL(t,(key[n*2+1])); \
 161         a=CAST_S_table0[(t>> 8)&0xff]; \
 162         b=CAST_S_table1[(t    )&0xff]; \
 163         c=CAST_S_table2[(t>>24)&0xff]; \
 164         d=CAST_S_table3[(t>>16)&0xff]; \
 165         L^=(((((a OP2 b)&0xffffffffL) OP3 c)&0xffffffffL) OP1 d)&0xffffffffL; \
 166         }
 167 #endif
 168
 169 extern const CAST_LONG CAST_S_table0[256];
 170 extern const CAST_LONG CAST_S_table1[256];
 171 extern const CAST_LONG CAST_S_table2[256];
 172 extern const CAST_LONG CAST_S_table3[256];
 173 extern const CAST_LONG CAST_S_table4[256];
 174 extern const CAST_LONG CAST_S_table5[256];
 175 extern const CAST_LONG CAST_S_table6[256];
 176 extern const CAST_LONG CAST_S_table7[256];