crypto/rc5/rc5_locl.h

   1 /* crypto/rc5/rc5_locl.h */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdlib.h>
  60
  61 #undef c2l
  62 #define c2l(c,l)        (l =((unsigned long)(*((c)++)))    , \
  63                          l|=((unsigned long)(*((c)++)))<< 8L, \
  64                          l|=((unsigned long)(*((c)++)))<<16L, \
  65                          l|=((unsigned long)(*((c)++)))<<24L)
  66
  67 /* NOTE - c is not incremented as per c2l */
  68 #undef c2ln
  69 #define c2ln(c,l1,l2,n) { \
  70                         c+=n; \
  71                         l1=l2=0; \
  72                         switch (n) { \
  73                         case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
  74                         case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
  75                         case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
  76                         case 5: l2|=((unsigned long)(*(--(c))));     \
  77                         case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
  78                         case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
  79                         case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
  80                         case 1: l1|=((unsigned long)(*(--(c))));     \
  81                                 } \
  82                         }
  83
  84 #undef l2c
  85 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
  86                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  87                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
  88                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
  89
  90 /* NOTE - c is not incremented as per l2c */
  91 #undef l2cn
  92 #define l2cn(l1,l2,c,n) { \
  93                         c+=n; \
  94                         switch (n) { \
  95                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
  96                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
  97                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
  98                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
  99                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
 100                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
 101                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
 102                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
 103                                 } \
 104                         }
 105
 106 /* NOTE - c is not incremented as per n2l */
 107 #define n2ln(c,l1,l2,n) { \
 108                         c+=n; \
 109                         l1=l2=0; \
 110                         switch (n) { \
 111                         case 8: l2 =((unsigned long)(*(--(c))))    ; \
 112                         case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
 113                         case 6: l2|=((unsigned long)(*(--(c))))<<16; \
 114                         case 5: l2|=((unsigned long)(*(--(c))))<<24; \
 115                         case 4: l1 =((unsigned long)(*(--(c))))    ; \
 116                         case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
 117                         case 2: l1|=((unsigned long)(*(--(c))))<<16; \
 118                         case 1: l1|=((unsigned long)(*(--(c))))<<24; \
 119                                 } \
 120                         }
 121
 122 /* NOTE - c is not incremented as per l2n */
 123 #define l2nn(l1,l2,c,n) { \
 124                         c+=n; \
 125                         switch (n) { \
 126                         case 8: *(--(c))=(unsigned char)(((l2)    )&0xff); \
 127                         case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
 128                         case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
 129                         case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
 130                         case 4: *(--(c))=(unsigned char)(((l1)    )&0xff); \
 131                         case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
 132                         case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
 133                         case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
 134                                 } \
 135                         }
 136
 137 #undef n2l
 138 #define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24L, \
 139                          l|=((unsigned long)(*((c)++)))<<16L, \
 140                          l|=((unsigned long)(*((c)++)))<< 8L, \
 141                          l|=((unsigned long)(*((c)++))))
 142
 143 #undef l2n
 144 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 145                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 146                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 147                          *((c)++)=(unsigned char)(((l)     )&0xff))
 148
 149 #if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)
 150 #define ROTATE_l32(a,n)     _lrotl(a,n)
 151 #define ROTATE_r32(a,n)     _lrotr(a,n)
 152 #elif defined(__GNUC__) && __GNUC__>=2 && !defined(NO_ASM) && !defined(NO_INLINE_ASM)
 153 # if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
 154 #  define ROTATE_l32(a,n)       ({ register unsigned int ret;   \
 155                                         asm ("roll %%cl,%0"     \
 156                                                 : "=r"(ret)     \
 157                                                 : "c"(n),"0"(a) \
 158                                                 : "cc");        \
 159                                         ret;                    \
 160                                 })
 161 #  define ROTATE_r32(a,n)       ({ register unsigned int ret;   \
 162                                         asm ("rorl %%cl,%0"     \
 163                                                 : "=r"(ret)     \
 164                                                 : "c"(n),"0"(a) \
 165                                                 : "cc");        \
 166                                         ret;                    \
 167                                 })
 168 # endif
 169 #else
 170 #define ROTATE_l32(a,n)     (((a)<<(n&0x1f))|(((a)&0xffffffff)>>(32-(n&0x1f))))
 171 #define ROTATE_r32(a,n)     (((a)<<(32-(n&0x1f)))|(((a)&0xffffffff)>>(n&0x1f)))
 172 #endif
 173
 174 #define RC5_32_MASK     0xffffffffL
 175
 176 #define RC5_16_P        0xB7E1
 177 #define RC5_16_Q        0x9E37
 178 #define RC5_32_P        0xB7E15163L
 179 #define RC5_32_Q        0x9E3779B9L
 180 #define RC5_64_P        0xB7E151628AED2A6BLL
 181 #define RC5_64_Q        0x9E3779B97F4A7C15LL
 182
 183 #define E_RC5_32(a,b,s,n) \
 184         a^=b; \
 185         a=ROTATE_l32(a,b); \
 186         a+=s[n]; \
 187         a&=RC5_32_MASK; \
 188         b^=a; \
 189         b=ROTATE_l32(b,a); \
 190         b+=s[n+1]; \
 191         b&=RC5_32_MASK;
 192
 193 #define D_RC5_32(a,b,s,n) \
 194         b-=s[n+1]; \
 195         b&=RC5_32_MASK; \
 196         b=ROTATE_r32(b,a); \
 197         b^=a; \
 198         a-=s[n]; \
 199         a&=RC5_32_MASK; \
 200         a=ROTATE_r32(a,b); \
 201         a^=b;
 202
 203
 204