1 /* $NetBSD: md5_locl.h,v 1.1.1.1 2009/04/12 15:33:31 christos Exp $ */ 2 3 /* crypto/md/md5_locl.h */ 4 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) 5 * All rights reserved. 6 * 7 * This package is an SSL implementation written 8 * by Eric Young (eay@cryptsoft.com). 9 * The implementation was written so as to conform with Netscapes SSL. 10 * 11 * This library is free for commercial and non-commercial use as long as 12 * the following conditions are aheared to. The following conditions 13 * apply to all code found in this distribution, be it the RC4, RSA, 14 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 15 * included with this distribution is covered by the same copyright terms 16 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 17 * 18 * Copyright remains Eric Young's, and as such any Copyright notices in 19 * the code are not to be removed. 20 * If this package is used in a product, Eric Young should be given attribution 21 * as the author of the parts of the library used. 22 * This can be in the form of a textual message at program startup or 23 * in documentation (online or textual) provided with the package. 24 * 25 * Redistribution and use in source and binary forms, with or without 26 * modification, are permitted provided that the following conditions 27 * are met: 28 * 1. Redistributions of source code must retain the copyright 29 * notice, this list of conditions and the following disclaimer. 30 * 2. Redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution. 33 * 3. All advertising materials mentioning features or use of this software 34 * must display the following acknowledgement: 35 * "This product includes cryptographic software written by 36 * Eric Young (eay@cryptsoft.com)" 37 * The word 'cryptographic' can be left out if the rouines from the library 38 * being used are not cryptographic related :-). 39 * 4. If you include any Windows specific code (or a derivative thereof) from 40 * the apps directory (application code) you must include an acknowledgement: 41 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 42 * 43 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 46 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 53 * SUCH DAMAGE. 54 * 55 * The licence and distribution terms for any publically available version or 56 * derivative of this code cannot be changed. i.e. this code cannot simply be 57 * copied and put under another distribution licence 58 * [including the GNU Public Licence.] 59 */ 60 61 #include <stdlib.h> 62 #include <string.h> 63 #include "md5.h" 64 65 #define ULONG unsigned long 66 #define UCHAR unsigned char 67 #define UINT unsigned int 68 69 #if defined(NOCONST) 70 #define const 71 #endif 72 73 #undef c2l 74 #define c2l(c,l) (l = ((unsigned long)(*((c)++))) , \ 75 l|=(((unsigned long)(*((c)++)))<< 8), \ 76 l|=(((unsigned long)(*((c)++)))<<16), \ 77 l|=(((unsigned long)(*((c)++)))<<24)) 78 79 #undef p_c2l 80 #define p_c2l(c,l,n) { \ 81 switch (n) { \ 82 case 0: l =((unsigned long)(*((c)++))); \ 83 case 1: l|=((unsigned long)(*((c)++)))<< 8; \ 84 case 2: l|=((unsigned long)(*((c)++)))<<16; \ 85 case 3: l|=((unsigned long)(*((c)++)))<<24; \ 86 } \ 87 } 88 89 /* NOTE the pointer is not incremented at the end of this */ 90 #undef c2l_p 91 #define c2l_p(c,l,n) { \ 92 l=0; \ 93 (c)+=n; \ 94 switch (n) { \ 95 case 3: l =((unsigned long)(*(--(c))))<<16; \ 96 case 2: l|=((unsigned long)(*(--(c))))<< 8; \ 97 case 1: l|=((unsigned long)(*(--(c)))) ; \ 98 } \ 99 } 100 101 #undef p_c2l_p 102 #define p_c2l_p(c,l,sc,len) { \ 103 switch (sc) \ 104 { \ 105 case 0: l =((unsigned long)(*((c)++))); \ 106 if (--len == 0U) break; \ 107 case 1: l|=((unsigned long)(*((c)++)))<< 8; \ 108 if (--len == 0U) break; \ 109 case 2: l|=((unsigned long)(*((c)++)))<<16; \ 110 } \ 111 } 112 113 #undef l2c 114 #define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \ 115 *((c)++)=(unsigned char)(((l)>> 8)&0xff), \ 116 *((c)++)=(unsigned char)(((l)>>16)&0xff), \ 117 *((c)++)=(unsigned char)(((l)>>24)&0xff)) 118 119 /* NOTE - c is not incremented as per l2c */ 120 #undef l2cn 121 #define l2cn(l1,l2,c,n) { \ 122 c+=n; \ 123 switch (n) { \ 124 case 8: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \ 125 case 7: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \ 126 case 6: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \ 127 case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \ 128 case 4: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \ 129 case 3: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \ 130 case 2: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \ 131 case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \ 132 } \ 133 } 134 135 /* A nice byte order reversal from Wei Dai <weidai@eskimo.com> */ 136 #if defined(WIN32) 137 /* 5 instructions with rotate instruction, else 9 */ 138 #define Endian_Reverse32(a) \ 139 { \ 140 unsigned long l=(a); \ 141 (a)=((ROTATE(l,8)&0x00FF00FF)|(ROTATE(l,24)&0xFF00FF00)); \ 142 } 143 #else 144 /* 6 instructions with rotate instruction, else 8 */ 145 #define Endian_Reverse32(a) \ 146 { \ 147 unsigned long l=(a); \ 148 l=(((l&0xFF00FF00)>>8L)|((l&0x00FF00FF)<<8L)); \ 149 (a)=ROTATE(l,16L); \ 150 } 151 #endif 152 153 /*% 154 #define F(x,y,z) (((x) & (y)) | ((~(x)) & (z))) 155 #define G(x,y,z) (((x) & (z)) | ((y) & (~(z)))) 156 */ 157 158 /* As pointed out by Wei Dai <weidai@eskimo.com>, the above can be 159 * simplified to the code below. Wei attributes these optimisations 160 * to Peter Gutmann's SHS code, and he attributes it to Rich Schroeppel. 161 */ 162 #define F(x,y,z) ((((y) ^ (z)) & (x)) ^ (z)) 163 #define G(x,y,z) ((((x) ^ (y)) & (z)) ^ (y)) 164 #define H(x,y,z) ((x) ^ (y) ^ (z)) 165 #define I(x,y,z) (((x) | (~(z))) ^ (y)) 166 167 #undef ROTATE 168 #if defined(WIN32) 169 #define ROTATE(a,n) _lrotl(a,n) 170 #else 171 #define ROTATE(a,n) (((a)<<(n))|(((a)&0xffffffff)>>(32-(n)))) 172 #endif 173 174 175 #define R0(a,b,c,d,k,s,t) { \ 176 a+=((k)+(t)+F((b),(c),(d))); \ 177 a=ROTATE(a,s); \ 178 a+=b; };\ 179 180 #define R1(a,b,c,d,k,s,t) { \ 181 a+=((k)+(t)+G((b),(c),(d))); \ 182 a=ROTATE(a,s); \ 183 a+=b; }; 184 185 #define R2(a,b,c,d,k,s,t) { \ 186 a+=((k)+(t)+H((b),(c),(d))); \ 187 a=ROTATE(a,s); \ 188 a+=b; }; 189 190 #define R3(a,b,c,d,k,s,t) { \ 191 a+=((k)+(t)+I((b),(c),(d))); \ 192 a=ROTATE(a,s); \ 193 a+=b; }; 194 195 /*! \file */ 196