crypto/rc5/rc5_locl.h

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 <stdlib.h>
  11
  12 #undef c2l
  13 #define c2l(c,l)        (l =((unsigned long)(*((c)++)))    , \
  14                          l|=((unsigned long)(*((c)++)))<< 8L, \
  15                          l|=((unsigned long)(*((c)++)))<<16L, \
  16                          l|=((unsigned long)(*((c)++)))<<24L)
  17
  18 /* NOTE - c is not incremented as per c2l */
  19 #undef c2ln
  20 #define c2ln(c,l1,l2,n) { \
  21                         c+=n; \
  22                         l1=l2=0; \
  23                         switch (n) { \
  24                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
  25                         /* fall thru */                               \
  26                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
  27                         /* fall thru */                               \
  28                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
  29                         /* fall thru */                               \
  30                         case 5: l2|=((unsigned long)(*(--(c))));      \
  31                         /* fall thru */                               \
  32                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
  33                         /* fall thru */                               \
  34                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
  35                         /* fall thru */                               \
  36                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
  37                         /* fall thru */                               \
  38                         case 1: l1|=((unsigned long)(*(--(c))));      \
  39                                 } \
  40                         }
  41
  42 #undef l2c
  43 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
  44                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  45                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
  46                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
  47
  48 /* NOTE - c is not incremented as per l2c */
  49 #undef l2cn
  50 #define l2cn(l1,l2,c,n) { \
  51                         c+=n; \
  52                         switch (n) { \
  53                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
  54                         /* fall thru */                                     \
  55                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
  56                         /* fall thru */                                     \
  57                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
  58                         /* fall thru */                                     \
  59                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
  60                         /* fall thru */                                     \
  61                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
  62                         /* fall thru */                                     \
  63                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
  64                         /* fall thru */                                     \
  65                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
  66                         /* fall thru */                                     \
  67                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
  68                                 } \
  69                         }
  70
  71 /* NOTE - c is not incremented as per n2l */
  72 #define n2ln(c,l1,l2,n) { \
  73                         c+=n; \
  74                         l1=l2=0; \
  75                         switch (n) { \
  76                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
  77                         /* fall thru */                              \
  78                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
  79                         /* fall thru */                              \
  80                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
  81                         /* fall thru */                              \
  82                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
  83                         /* fall thru */                              \
  84                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
  85                         /* fall thru */                              \
  86                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
  87                         /* fall thru */                              \
  88                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
  89                         /* fall thru */                              \
  90                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
  91                                 } \
  92                         }
  93
  94 /* NOTE - c is not incremented as per l2n */
  95 #define l2nn(l1,l2,c,n) { \
  96                         c+=n; \
  97                         switch (n) { \
  98                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
  99                         /* fall thru */                                    \
 100                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
 101                         /* fall thru */                                    \
 102                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
 103                         /* fall thru */                                    \
 104                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
 105                         /* fall thru */                                    \
 106                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
 107                         /* fall thru */                                    \
 108                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
 109                         /* fall thru */                                    \
 110                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
 111                         /* fall thru */                                    \
 112                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
 113                                 } \
 114                         }
 115
 116 #undef n2l
 117 #define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
 118                          l|=((unsigned long)(*((c)++)))<<16L, \
 119                          l|=((unsigned long)(*((c)++)))<< 8L, \
 120                          l|=((unsigned long)(*((c)++))))
 121
 122 #undef l2n
 123 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 124                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 125                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 126                          *((c)++)=(unsigned char)(((l)     )&0xff))
 127
 128 #if (defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER))
 129 # define ROTATE_l32(a,n)     _lrotl(a,n)
 130 # define ROTATE_r32(a,n)     _lrotr(a,n)
 131 #elif defined(__ICC)
 132 # define ROTATE_l32(a,n)     _rotl(a,n)
 133 # define ROTATE_r32(a,n)     _rotr(a,n)
 134 #elif defined(__GNUC__) && __GNUC__>=2 && !defined(__STRICT_ANSI__) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) && !defined(PEDANTIC)
 135 # if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
 136 #  define ROTATE_l32(a,n)       ({ register unsigned int ret;   \
 137                                         asm ("roll %%cl,%0"     \
 138                                                 : "=r"(ret)     \
 139                                                 : "c"(n),"0"((unsigned int)(a)) \
 140                                                 : "cc");        \
 141                                         ret;                    \
 142                                 })
 143 #  define ROTATE_r32(a,n)       ({ register unsigned int ret;   \
 144                                         asm ("rorl %%cl,%0"     \
 145                                                 : "=r"(ret)     \
 146                                                 : "c"(n),"0"((unsigned int)(a)) \
 147                                                 : "cc");        \
 148                                         ret;                    \
 149                                 })
 150 # endif
 151 #endif
 152 #ifndef ROTATE_l32
 153 # define ROTATE_l32(a,n)     (((a)<<(n&0x1f))|(((a)&0xffffffff)>>((32-n)&0x1f)))
 154 #endif
 155 #ifndef ROTATE_r32
 156 # define ROTATE_r32(a,n)     (((a)<<((32-n)&0x1f))|(((a)&0xffffffff)>>(n&0x1f)))
 157 #endif
 158
 159 #define RC5_32_MASK     0xffffffffL
 160
 161 #define RC5_16_P        0xB7E1
 162 #define RC5_16_Q        0x9E37
 163 #define RC5_32_P        0xB7E15163L
 164 #define RC5_32_Q        0x9E3779B9L
 165 #define RC5_64_P        0xB7E151628AED2A6BLL
 166 #define RC5_64_Q        0x9E3779B97F4A7C15LL
 167
 168 #define E_RC5_32(a,b,s,n) \
 169         a^=b; \
 170         a=ROTATE_l32(a,b); \
 171         a+=s[n]; \
 172         a&=RC5_32_MASK; \
 173         b^=a; \
 174         b=ROTATE_l32(b,a); \
 175         b+=s[n+1]; \
 176         b&=RC5_32_MASK;
 177
 178 #define D_RC5_32(a,b,s,n) \
 179         b-=s[n+1]; \
 180         b&=RC5_32_MASK; \
 181         b=ROTATE_r32(b,a); \
 182         b^=a; \
 183         a-=s[n]; \
 184         a&=RC5_32_MASK; \
 185         a=ROTATE_r32(a,b); \
 186         a^=b;