crypto/rc2/rc2_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 #undef c2l
  11 #define c2l(c,l)        (l =((unsigned long)(*((c)++)))    , \
  12                          l|=((unsigned long)(*((c)++)))<< 8L, \
  13                          l|=((unsigned long)(*((c)++)))<<16L, \
  14                          l|=((unsigned long)(*((c)++)))<<24L)
  15
  16 /* NOTE - c is not incremented as per c2l */
  17 #undef c2ln
  18 #define c2ln(c,l1,l2,n) { \
  19                         c+=n; \
  20                         l1=l2=0; \
  21                         switch (n) { \
  22                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
  23                         /* fall thru */                               \
  24                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
  25                         /* fall thru */                               \
  26                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
  27                         /* fall thru */                               \
  28                         case 5: l2|=((unsigned long)(*(--(c))));      \
  29                         /* fall thru */                               \
  30                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
  31                         /* fall thru */                               \
  32                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
  33                         /* fall thru */                               \
  34                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
  35                         /* fall thru */                               \
  36                         case 1: l1|=((unsigned long)(*(--(c))));      \
  37                                 } \
  38                         }
  39
  40 #undef l2c
  41 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
  42                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  43                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
  44                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
  45
  46 /* NOTE - c is not incremented as per l2c */
  47 #undef l2cn
  48 #define l2cn(l1,l2,c,n) { \
  49                         c+=n; \
  50                         switch (n) { \
  51                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
  52                         /* fall thru */                                     \
  53                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
  54                         /* fall thru */                                     \
  55                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
  56                         /* fall thru */                                     \
  57                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
  58                         /* fall thru */                                     \
  59                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
  60                         /* fall thru */                                     \
  61                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
  62                         /* fall thru */                                     \
  63                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
  64                         /* fall thru */                                     \
  65                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
  66                                 } \
  67                         }
  68
  69 /* NOTE - c is not incremented as per n2l */
  70 #define n2ln(c,l1,l2,n) { \
  71                         c+=n; \
  72                         l1=l2=0; \
  73                         switch (n) { \
  74                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
  75                         /* fall thru */                              \
  76                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
  77                         /* fall thru */                              \
  78                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
  79                         /* fall thru */                              \
  80                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
  81                         /* fall thru */                              \
  82                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
  83                         /* fall thru */                              \
  84                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
  85                         /* fall thru */                              \
  86                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
  87                         /* fall thru */                              \
  88                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
  89                                 } \
  90                         }
  91
  92 /* NOTE - c is not incremented as per l2n */
  93 #define l2nn(l1,l2,c,n) { \
  94                         c+=n; \
  95                         switch (n) { \
  96                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
  97                         /* fall thru */                                    \
  98                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
  99                         /* fall thru */                                    \
 100                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
 101                         /* fall thru */                                    \
 102                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
 103                         /* fall thru */                                    \
 104                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
 105                         /* fall thru */                                    \
 106                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
 107                         /* fall thru */                                    \
 108                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
 109                         /* fall thru */                                    \
 110                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
 111                                 } \
 112                         }
 113
 114 #undef n2l
 115 #define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
 116                          l|=((unsigned long)(*((c)++)))<<16L, \
 117                          l|=((unsigned long)(*((c)++)))<< 8L, \
 118                          l|=((unsigned long)(*((c)++))))
 119
 120 #undef l2n
 121 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 122                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 123                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 124                          *((c)++)=(unsigned char)(((l)     )&0xff))
 125
 126 #define C_RC2(n) \
 127         t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff; \
 128         x0=(t<<1)|(t>>15); \
 129         t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff; \
 130         x1=(t<<2)|(t>>14); \
 131         t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff; \
 132         x2=(t<<3)|(t>>13); \
 133         t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff; \
 134         x3=(t<<5)|(t>>11);