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Posted on 2006-11-09 20:54 neter 阅读(419) 评论(0) 编辑 收藏 引用 所属分类: 程序设计
http://www.ietf.org/rfc/rfc1321.txt 此为rfc1321.txt
1 #include <stdio.h> 2![](/Images/OutliningIndicators/None.gif) 3![](/Images/OutliningIndicators/ExpandedBlockStart.gif) typedef struct { 4![](/Images/OutliningIndicators/InBlock.gif) 5 unsigned int state[4]; 6![](/Images/OutliningIndicators/InBlock.gif) 7 unsigned int count[2]; 8![](/Images/OutliningIndicators/InBlock.gif) 9 unsigned char buffer[64]; 10![](/Images/OutliningIndicators/InBlock.gif) 11 } MD5Context; 12![](/Images/OutliningIndicators/None.gif) 13 14![](/Images/OutliningIndicators/None.gif) 15 void MD5_Init(MD5Context * context); 16![](/Images/OutliningIndicators/None.gif) 17 void MD5_Update(MD5Context * context, unsigned char * buf, int len); 18![](/Images/OutliningIndicators/None.gif) 19 void MD5_Final(MD5Context * context, unsigned char digest[16]); 20![](/Images/OutliningIndicators/None.gif) 21 #define S11 7 22![](/Images/OutliningIndicators/None.gif) 23 #define S12 12 24![](/Images/OutliningIndicators/None.gif) 25 #define S13 17 26![](/Images/OutliningIndicators/None.gif) 27 #define S14 22 28![](/Images/OutliningIndicators/None.gif) 29 #define S21 5 30![](/Images/OutliningIndicators/None.gif) 31 #define S22 9 32![](/Images/OutliningIndicators/None.gif) 33 #define S23 14 34![](/Images/OutliningIndicators/None.gif) 35 #define S24 20 36![](/Images/OutliningIndicators/None.gif) 37 #define S31 4 38![](/Images/OutliningIndicators/None.gif) 39 #define S32 11 40![](/Images/OutliningIndicators/None.gif) 41 #define S33 16 42![](/Images/OutliningIndicators/None.gif) 43 #define S34 23 44![](/Images/OutliningIndicators/None.gif) 45 #define S41 6 46![](/Images/OutliningIndicators/None.gif) 47 #define S42 10 48![](/Images/OutliningIndicators/None.gif) 49 #define S43 15 50![](/Images/OutliningIndicators/None.gif) 51 #define S44 21 52![](/Images/OutliningIndicators/None.gif) 53 54![](/Images/OutliningIndicators/None.gif) 55 static unsigned char PADDING[64] = 56![](/Images/OutliningIndicators/None.gif) 57![](/Images/OutliningIndicators/ExpandedBlockStart.gif) ![](/Images/OutliningIndicators/ContractedBlock.gif) { 58![](/Images/OutliningIndicators/InBlock.gif) 59 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 60![](/Images/OutliningIndicators/InBlock.gif) 61 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62![](/Images/OutliningIndicators/InBlock.gif) 63 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 64![](/Images/OutliningIndicators/InBlock.gif) 65 }; 66![](/Images/OutliningIndicators/None.gif) 67 #define F(x, y, z) (((x) & (y)) | ((~x) & (z))) 68![](/Images/OutliningIndicators/None.gif) 69 #define G(x, y, z) (((x) & (z)) | ((y) & (~z))) 70![](/Images/OutliningIndicators/None.gif) 71 #define H(x, y, z) ((x) ^ (y) ^ (z)) 72![](/Images/OutliningIndicators/None.gif) 73 #define I(x, y, z) ((y) ^ ((x) | (~z))) 74![](/Images/OutliningIndicators/None.gif) 75 76![](/Images/OutliningIndicators/None.gif) 77 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) 78![](/Images/OutliningIndicators/None.gif) 79 80![](/Images/OutliningIndicators/None.gif) 81 #define FF(a, b, c, d, x, s, ac) \ 82![](/Images/OutliningIndicators/None.gif) 83![](/Images/OutliningIndicators/ExpandedBlockStart.gif) { \ 84![](/Images/OutliningIndicators/InBlock.gif) 85 (a) += F((b), (c), (d)) + (x) + (unsigned int)(ac); \ 86![](/Images/OutliningIndicators/InBlock.gif) 87 (a) = ROTATE_LEFT((a), (s)); \ 88![](/Images/OutliningIndicators/InBlock.gif) 89 (a) += (b); \ 90![](/Images/OutliningIndicators/InBlock.gif) 91 } 92![](/Images/OutliningIndicators/None.gif) 93 94![](/Images/OutliningIndicators/None.gif) 95 #define GG(a, b, c, d, x, s, ac) \ 96![](/Images/OutliningIndicators/None.gif) 97![](/Images/OutliningIndicators/ExpandedBlockStart.gif) { \ 98![](/Images/OutliningIndicators/InBlock.gif) 99 (a) += G((b), (c), (d)) + (x) + (unsigned int)(ac); \ 100![](/Images/OutliningIndicators/InBlock.gif) 101 (a) = ROTATE_LEFT((a), (s)); \ 102![](/Images/OutliningIndicators/InBlock.gif) 103 (a) += (b); \ 104![](/Images/OutliningIndicators/InBlock.gif) 105 } 106![](/Images/OutliningIndicators/None.gif) 107 108![](/Images/OutliningIndicators/None.gif) 109 #define HH(a, b, c, d, x, s, ac) \ 110![](/Images/OutliningIndicators/None.gif) 111![](/Images/OutliningIndicators/ExpandedBlockStart.gif) { \ 112![](/Images/OutliningIndicators/InBlock.gif) 113 (a) += H((b), (c), (d)) + (x) + (unsigned int)(ac); \ 114![](/Images/OutliningIndicators/InBlock.gif) 115 (a) = ROTATE_LEFT((a), (s)); \ 116![](/Images/OutliningIndicators/InBlock.gif) 117 (a) += (b); \ 118![](/Images/OutliningIndicators/InBlock.gif) 119 } 120![](/Images/OutliningIndicators/None.gif) 121 122![](/Images/OutliningIndicators/None.gif) 123 #define II(a, b, c, d, x, s, ac) \ 124![](/Images/OutliningIndicators/None.gif) 125![](/Images/OutliningIndicators/ExpandedBlockStart.gif) { \ 126![](/Images/OutliningIndicators/InBlock.gif) 127 (a) += I((b), (c), (d)) + (x) + (unsigned int)(ac); \ 128![](/Images/OutliningIndicators/InBlock.gif) 129 (a) = ROTATE_LEFT((a), (s)); \ 130![](/Images/OutliningIndicators/InBlock.gif) 131 (a) += (b); \ 132![](/Images/OutliningIndicators/InBlock.gif) 133 } 134![](/Images/OutliningIndicators/None.gif) 135 static void MD5_Encode(unsigned char * output, unsigned int * input, int len) 136![](/Images/OutliningIndicators/None.gif) 137![](/Images/OutliningIndicators/ExpandedBlockStart.gif) ![](/Images/OutliningIndicators/ContractedBlock.gif) { 138![](/Images/OutliningIndicators/InBlock.gif) 139 unsigned int i, j; 140![](/Images/OutliningIndicators/InBlock.gif) 141 142![](/Images/OutliningIndicators/InBlock.gif) 143 for (i = 0, j = 0; j < len; i++, j += 4) 144![](/Images/OutliningIndicators/InBlock.gif) 145![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) { 146![](/Images/OutliningIndicators/InBlock.gif) 147 output[j] = (unsigned char) (input[i] & 0xff); 148![](/Images/OutliningIndicators/InBlock.gif) 149 output[j + 1] = (unsigned char) ((input[i] >> 8) & 0xff); 150![](/Images/OutliningIndicators/InBlock.gif) 151 output[j + 2] = (unsigned char) ((input[i] >> 16) & 0xff); 152![](/Images/OutliningIndicators/InBlock.gif) 153 output[j + 3] = (unsigned char) ((input[i] >> 24) & 0xff); 154![](/Images/OutliningIndicators/InBlock.gif) 155 } 156![](/Images/OutliningIndicators/InBlock.gif) 157 } 158![](/Images/OutliningIndicators/None.gif) 159 160![](/Images/OutliningIndicators/None.gif) 161 static void MD5_Decode(unsigned int * output, unsigned char * input, int len) 162![](/Images/OutliningIndicators/None.gif) 163![](/Images/OutliningIndicators/ExpandedBlockStart.gif) ![](/Images/OutliningIndicators/ContractedBlock.gif) { 164![](/Images/OutliningIndicators/InBlock.gif) 165 unsigned int i, j; 166![](/Images/OutliningIndicators/InBlock.gif) 167 168![](/Images/OutliningIndicators/InBlock.gif) 169 for (i = 0, j = 0; j < len; i++, j += 4) 170![](/Images/OutliningIndicators/InBlock.gif) 171![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) { 172![](/Images/OutliningIndicators/InBlock.gif) 173 output[i] = ((unsigned int) input[j]) | 174![](/Images/OutliningIndicators/InBlock.gif) 175 (((unsigned int) input[j + 1]) << 8) | 176![](/Images/OutliningIndicators/InBlock.gif) 177 (((unsigned int) input[j + 2]) << 16) | 178![](/Images/OutliningIndicators/InBlock.gif) 179 (((unsigned int) input[j + 3]) << 24); 180![](/Images/OutliningIndicators/InBlock.gif) 181 } 182![](/Images/OutliningIndicators/InBlock.gif) 183 } 184![](/Images/OutliningIndicators/None.gif) 185 186![](/Images/OutliningIndicators/None.gif) 187 static void MD5_Transform(unsigned int state[4], unsigned char block[64]) 188![](/Images/OutliningIndicators/None.gif) 189![](/Images/OutliningIndicators/ExpandedBlockStart.gif) ![](/Images/OutliningIndicators/ContractedBlock.gif) { 190![](/Images/OutliningIndicators/InBlock.gif) 191 unsigned int a = state[0], b = state[1], c = state[2], d = state[3], x[16]; 192![](/Images/OutliningIndicators/InBlock.gif) 193 194![](/Images/OutliningIndicators/InBlock.gif) 195 MD5_Decode(x, block, 64); 196![](/Images/OutliningIndicators/InBlock.gif) 197 198![](/Images/OutliningIndicators/InBlock.gif) 199![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) /**//* Round 1 */ 200![](/Images/OutliningIndicators/InBlock.gif) 201![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(a, b, c, d, x[0], S11, 0xd76aa478); /**//* 1 */ 202![](/Images/OutliningIndicators/InBlock.gif) 203![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(d, a, b, c, x[1], S12, 0xe8c7b756); /**//* 2 */ 204![](/Images/OutliningIndicators/InBlock.gif) 205![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(c, d, a, b, x[2], S13, 0x242070db); /**//* 3 */ 206![](/Images/OutliningIndicators/InBlock.gif) 207![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(b, c, d, a, x[3], S14, 0xc1bdceee); /**//* 4 */ 208![](/Images/OutliningIndicators/InBlock.gif) 209![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(a, b, c, d, x[4], S11, 0xf57c0faf); /**//* 5 */ 210![](/Images/OutliningIndicators/InBlock.gif) 211![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(d, a, b, c, x[5], S12, 0x4787c62a); /**//* 6 */ 212![](/Images/OutliningIndicators/InBlock.gif) 213![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(c, d, a, b, x[6], S13, 0xa8304613); /**//* 7 */ 214![](/Images/OutliningIndicators/InBlock.gif) 215![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(b, c, d, a, x[7], S14, 0xfd469501); /**//* 8 */ 216![](/Images/OutliningIndicators/InBlock.gif) 217![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(a, b, c, d, x[8], S11, 0x698098d8); /**//* 9 */ 218![](/Images/OutliningIndicators/InBlock.gif) 219![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(d, a, b, c, x[9], S12, 0x8b44f7af); /**//* 10 */ 220![](/Images/OutliningIndicators/InBlock.gif) 221![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(c, d, a, b, x[10], S13, 0xffff5bb1); /**//* 11 */ 222![](/Images/OutliningIndicators/InBlock.gif) 223![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(b, c, d, a, x[11], S14, 0x895cd7be); /**//* 12 */ 224![](/Images/OutliningIndicators/InBlock.gif) 225![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(a, b, c, d, x[12], S11, 0x6b901122); /**//* 13 */ 226![](/Images/OutliningIndicators/InBlock.gif) 227![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(d, a, b, c, x[13], S12, 0xfd987193); /**//* 14 */ 228![](/Images/OutliningIndicators/InBlock.gif) 229![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(c, d, a, b, x[14], S13, 0xa679438e); /**//* 15 */ 230![](/Images/OutliningIndicators/InBlock.gif) 231![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) FF(b, c, d, a, x[15], S14, 0x49b40821); /**//* 16 */ 232![](/Images/OutliningIndicators/InBlock.gif) 233 234![](/Images/OutliningIndicators/InBlock.gif) 235![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) /**//* Round 2 */ 236![](/Images/OutliningIndicators/InBlock.gif) 237![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(a, b, c, d, x[1], S21, 0xf61e2562); /**//* 17 */ 238![](/Images/OutliningIndicators/InBlock.gif) 239![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(d, a, b, c, x[6], S22, 0xc040b340); /**//* 18 */ 240![](/Images/OutliningIndicators/InBlock.gif) 241![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(c, d, a, b, x[11], S23, 0x265e5a51); /**//* 19 */ 242![](/Images/OutliningIndicators/InBlock.gif) 243![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(b, c, d, a, x[0], S24, 0xe9b6c7aa); /**//* 20 */ 244![](/Images/OutliningIndicators/InBlock.gif) 245![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(a, b, c, d, x[5], S21, 0xd62f105d); /**//* 21 */ 246![](/Images/OutliningIndicators/InBlock.gif) 247![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(d, a, b, c, x[10], S22, 0x2441453); /**//* 22 */ 248![](/Images/OutliningIndicators/InBlock.gif) 249![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(c, d, a, b, x[15], S23, 0xd8a1e681); /**//* 23 */ 250![](/Images/OutliningIndicators/InBlock.gif) 251![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(b, c, d, a, x[4], S24, 0xe7d3fbc8); /**//* 24 */ 252![](/Images/OutliningIndicators/InBlock.gif) 253![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(a, b, c, d, x[9], S21, 0x21e1cde6); /**//* 25 */ 254![](/Images/OutliningIndicators/InBlock.gif) 255![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(d, a, b, c, x[14], S22, 0xc33707d6); /**//* 26 */ 256![](/Images/OutliningIndicators/InBlock.gif) 257![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(c, d, a, b, x[3], S23, 0xf4d50d87); /**//* 27 */ 258![](/Images/OutliningIndicators/InBlock.gif) 259![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(b, c, d, a, x[8], S24, 0x455a14ed); /**//* 28 */ 260![](/Images/OutliningIndicators/InBlock.gif) 261![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(a, b, c, d, x[13], S21, 0xa9e3e905); /**//* 29 */ 262![](/Images/OutliningIndicators/InBlock.gif) 263![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(d, a, b, c, x[2], S22, 0xfcefa3f8); /**//* 30 */ 264![](/Images/OutliningIndicators/InBlock.gif) 265![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(c, d, a, b, x[7], S23, 0x676f02d9); /**//* 31 */ 266![](/Images/OutliningIndicators/InBlock.gif) 267![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /**//* 32 */ 268![](/Images/OutliningIndicators/InBlock.gif) 269 270![](/Images/OutliningIndicators/InBlock.gif) 271![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) /**//* Round 3 */ 272![](/Images/OutliningIndicators/InBlock.gif) 273![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) HH(a, b, c, d, x[5], S31, 0xfffa3942); /**//* 33 */ 274![](/Images/OutliningIndicators/InBlock.gif) 275![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) HH(d, a, b, c, x[8], S32, 0x8771f681); /**//* 34 */ 276![](/Images/OutliningIndicators/InBlock.gif) 277![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) HH(c, d, a, b, x[11], S33, 0x6d9d6122); /**//* 35 */ 278![](/Images/OutliningIndicators/InBlock.gif) 279![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) HH(b, c, d, a, x[14], S34, 0xfde5380c); /**//* 36 */ 280![](/Images/OutliningIndicators/InBlock.gif) 281![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) HH(a, b, c, d, x[1], S31, 0xa4beea44); /**//* 37 */ 282![](/Images/OutliningIndicators/InBlock.gif) 283![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) HH(d, a, b, c, x[4], S32, 0x4bdecfa9); /**//* 38 */ 284![](/Images/OutliningIndicators/InBlock.gif) 285![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) HH(c, d, a, b, x[7], S33, 0xf6bb4b60); /**//* 39 */ 286![](/Images/OutliningIndicators/InBlock.gif) 287![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) HH(b, c, d, a, x[10], S34, 0xbebfbc70); /**//* 40 */ 288![](/Images/OutliningIndicators/InBlock.gif) 289![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif) HH(a, b, c, d, x[13], S31, 0x289b7ec6); /**//* 41 */ 290![](/Images/OutliningIndicators/InBlock.gif)
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