contrib/dhcp-3.0/dst/md5_locl.h

   1 /* crypto/md/md5_locl.h */
   2 /* Copyright (C) 1995-1997 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 #include <string.h>
  61 #include "md5.h"
  62
  63 #define ULONG   unsigned long
  64 #define UCHAR   unsigned char
  65 #define UINT    unsigned int
  66
  67 #if defined(NOCONST)
  68 #define const
  69 #endif
  70
  71 #undef c2l
  72 #define c2l(c,l)        (l = ((unsigned long)(*((c)++)))     , \
  73                          l|=(((unsigned long)(*((c)++)))<< 8), \
  74                          l|=(((unsigned long)(*((c)++)))<<16), \
  75                          l|=(((unsigned long)(*((c)++)))<<24))
  76
  77 #undef p_c2l
  78 #define p_c2l(c,l,n)    { \
  79                         switch (n) { \
  80                         case 0: l =((unsigned long)(*((c)++))); \
  81                         case 1: l|=((unsigned long)(*((c)++)))<< 8; \
  82                         case 2: l|=((unsigned long)(*((c)++)))<<16; \
  83                         case 3: l|=((unsigned long)(*((c)++)))<<24; \
  84                                 } \
  85                         }
  86
  87 /* NOTE the pointer is not incremented at the end of this */
  88 #undef c2l_p
  89 #define c2l_p(c,l,n)    { \
  90                         l=0; \
  91                         (c)+=n; \
  92                         switch (n) { \
  93                         case 3: l =((unsigned long)(*(--(c))))<<16; \
  94                         case 2: l|=((unsigned long)(*(--(c))))<< 8; \
  95                         case 1: l|=((unsigned long)(*(--(c))))    ; \
  96                                 } \
  97                         }
  98
  99 #undef p_c2l_p
 100 #define p_c2l_p(c,l,sc,len) { \
 101                         switch (sc) \
 102                                 { \
 103                         case 0: l =((unsigned long)(*((c)++))); \
 104                                 if (--len == 0) break; \
 105                         case 1: l|=((unsigned long)(*((c)++)))<< 8; \
 106                                 if (--len == 0) break; \
 107                         case 2: l|=((unsigned long)(*((c)++)))<<16; \
 108                                 } \
 109                         }
 110
 111 #undef l2c
 112 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)    )&0xff), \
 113                          *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
 114                          *((c)++)=(unsigned char)(((l)>>16)&0xff), \
 115                          *((c)++)=(unsigned char)(((l)>>24)&0xff))
 116
 117 /* NOTE - c is not incremented as per l2c */
 118 #undef l2cn
 119 #define l2cn(l1,l2,c,n) { \
 120                         c+=n; \
 121                         switch (n) { \
 122                         case 8: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
 123                         case 7: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
 124                         case 6: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
 125                         case 5: *(--(c))=(unsigned char)(((l2)    )&0xff); \
 126                         case 4: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
 127                         case 3: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
 128                         case 2: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
 129                         case 1: *(--(c))=(unsigned char)(((l1)    )&0xff); \
 130                                 } \
 131                         }
 132
 133 /* A nice byte order reversal from Wei Dai <weidai@eskimo.com> */
 134 #if defined(WIN32)
 135 /* 5 instructions with rotate instruction, else 9 */
 136 #define Endian_Reverse32(a) \
 137         { \
 138         unsigned long l=(a); \
 139         (a)=((ROTATE(l,8)&0x00FF00FF)|(ROTATE(l,24)&0xFF00FF00)); \
 140         }
 141 #else
 142 /* 6 instructions with rotate instruction, else 8 */
 143 #define Endian_Reverse32(a) \
 144         { \
 145         unsigned long l=(a); \
 146         l=(((l&0xFF00FF00)>>8L)|((l&0x00FF00FF)<<8L)); \
 147         (a)=ROTATE(l,16L); \
 148         }
 149 #endif
 150 /*
 151 #define F(x,y,z)        (((x) & (y))  |  ((~(x)) & (z)))
 152 #define G(x,y,z)        (((x) & (z))  |  ((y) & (~(z))))
 153 */
 154
 155 /* As pointed out by Wei Dai <weidai@eskimo.com>, the above can be
 156  * simplified to the code below.  Wei attributes these optimisations
 157  * to Peter Gutmann's SHS code, and he attributes it to Rich Schroeppel.
 158  */
 159 #define F(x,y,z)        ((((y) ^ (z)) & (x)) ^ (z))
 160 #define G(x,y,z)        ((((x) ^ (y)) & (z)) ^ (y))
 161 #define H(x,y,z)        ((x) ^ (y) ^ (z))
 162 #define I(x,y,z)        (((x) | (~(z))) ^ (y))
 163
 164 #undef ROTATE
 165 #if defined(WIN32)
 166 #define ROTATE(a,n)     _lrotl(a,n)
 167 #else
 168 #define ROTATE(a,n)     (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
 169 #endif
 170
 171 #define LOCL_R0(a,b,c,d,k,s,t) { \
 172         a+=((k)+(t)+F((b),(c),(d))); \
 173         a=ROTATE(a,s); \
 174         a+=b; };\
 175
 176 #define LOCL_R1(a,b,c,d,k,s,t) { \
 177         a+=((k)+(t)+G((b),(c),(d))); \
 178         a=ROTATE(a,s); \
 179         a+=b; };
 180
 181 #define LOCL_R2(a,b,c,d,k,s,t) { \
 182         a+=((k)+(t)+H((b),(c),(d))); \
 183         a=ROTATE(a,s); \
 184         a+=b; };
 185
 186 #define LOCL_R3(a,b,c,d,k,s,t) { \
 187         a+=((k)+(t)+I((b),(c),(d))); \
 188         a=ROTATE(a,s); \
 189         a+=b; };