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Posted on 2006-11-09 20:54 neter 閱讀(426) 評(píng)論(0) 編輯 收藏 引用 所屬分類: 程序設(shè)計(jì)
http://www.ietf.org/rfc/rfc1321.txt?此為rfc1321.txt
??1 #include?<stdio.h>
??2
??3  typedef?struct? {
??4
??5????unsigned?int?state[4];??????
??6
??7????unsigned?int?count[2];??????
??8
??9????unsigned?char?buffer[64];??????
?10
?11 }?MD5Context;
?12
?13?
?14
?15void?MD5_Init(MD5Context?*?context);
?16
?17void?MD5_Update(MD5Context?*?context,?unsigned?char?*?buf,?int?len);
?18
?19void?MD5_Final(MD5Context?*?context,?unsigned?char?digest[16]);
?20
?21#define?S11?7
?22
?23#define?S12?12
?24
?25#define?S13?17
?26
?27#define?S14?22
?28
?29#define?S21?5
?30
?31#define?S22?9
?32
?33#define?S23?14
?34
?35#define?S24?20
?36
?37#define?S31?4
?38
?39#define?S32?11
?40
?41#define?S33?16
?42
?43#define?S34?23
?44
?45#define?S41?6
?46
?47#define?S42?10
?48
?49#define?S43?15
?50
?51#define?S44?21
?52
?53?
?54
?55static?unsigned?char?PADDING[64]?=
?56
?57{
?58
?59????0x80,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,
?60
?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
?63????0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0,?0
?64
?65};
?66
?67#define?F(x,?y,?z)?(((x)?&?(y))?|?((~x)?&?(z)))
?68
?69#define?G(x,?y,?z)?(((x)?&?(z))?|?((y)?&?(~z)))
?70
?71#define?H(x,?y,?z)?((x)?^?(y)?^?(z))
?72
?73#define?I(x,?y,?z)?((y)?^?((x)?|?(~z)))
?74
?75?
?76
?77#define?ROTATE_LEFT(x,?n)?(((x)?<<?(n))?|?((x)?>>?(32-(n))))
?78
?79?
?80
?81#define?FF(a,?b,?c,?d,?x,?s,?ac)??????????\
?82
?83????{???????????????????????\
?84
?85????(a)?+=?F((b),?(c),?(d))?+?(x)?+?(unsigned?int)(ac);??\
?86
?87????(a)?=?ROTATE_LEFT((a),?(s));???????????\
?88
?89????(a)?+=?(b);?????????????????\
?90
?91????}
?92
?93?
?94
?95#define?GG(a,?b,?c,?d,?x,?s,?ac)??????????\
?96
?97????{???????????????????????\
?98
?99????(a)?+=?G((b),?(c),?(d))?+?(x)?+?(unsigned?int)(ac);??\
100
101????(a)?=?ROTATE_LEFT((a),?(s));???????????\
102
103????(a)?+=?(b);?????????????????\
104
105????}
106
107?
108
109#define?HH(a,?b,?c,?d,?x,?s,?ac)??????????\
110
111????{???????????????????????\
112
113????(a)?+=?H((b),?(c),?(d))?+?(x)?+?(unsigned?int)(ac);??\
114
115????(a)?=?ROTATE_LEFT((a),?(s));???????????\
116
117????(a)?+=?(b);?????????????????\
118
119????}
120
121?
122
123#define?II(a,?b,?c,?d,?x,?s,?ac)??????????\
124
125????{???????????????????????\
126
127????(a)?+=?I((b),?(c),?(d))?+?(x)?+?(unsigned?int)(ac);??\
128
129????(a)?=?ROTATE_LEFT((a),?(s));???????????\
130
131????(a)?+=?(b);?????????????????\
132
133????}
134
135static?void?MD5_Encode(unsigned?char?*?output,?unsigned?int?*?input,?int?len)
136
137{
138
139????unsigned?int?i,?j;
140
141?
142
143????for?(i?=?0,?j?=?0;?j?<?len;?i++,?j?+=?4)?
144
145  ????{
146
147???????output[j]?=?(unsigned?char)?(input[i]?&?0xff);
148
149???????output[j?+?1]?=?(unsigned?char)?((input[i]?>>?8)?&?0xff);
150
151???????output[j?+?2]?=?(unsigned?char)?((input[i]?>>?16)?&?0xff);
152
153???????output[j?+?3]?=?(unsigned?char)?((input[i]?>>?24)?&?0xff);
154
155 ????}
156
157}
158
159?
160
161static?void?MD5_Decode(unsigned?int?*?output,?unsigned?char?*?input,?int?len)
162
163{
164
165????unsigned?int?i,?j;
166
167?
168
169????for?(i?=?0,?j?=?0;?j?<?len;?i++,?j?+=?4)
170
171????{
172
173???????output[i]?=?((unsigned?int)?input[j])?|
174
175???????????(((unsigned?int)?input[j?+?1])?<<?8)?|
176
177???????????(((unsigned?int)?input[j?+?2])?<<?16)?|
178
179???????????(((unsigned?int)?input[j?+?3])?<<?24);
180
181????}
182
183}
184
185?
186
187static?void?MD5_Transform(unsigned?int?state[4],?unsigned?char?block[64])
188
189{
190
191????unsigned?int?a?=?state[0],?b?=?state[1],?c?=?state[2],?d?=?state[3],?x[16];
192
193?
194
195????MD5_Decode(x,?block,?64);
196
197?
198
199????/**//*?Round?1?*/
200
201????FF(a,?b,?c,?d,?x[0],?S11,?0xd76aa478);????/**//*?1?*/
202
203????FF(d,?a,?b,?c,?x[1],?S12,?0xe8c7b756);????/**//*?2?*/
204
205????FF(c,?d,?a,?b,?x[2],?S13,?0x242070db);????/**//*?3?*/
206
207????FF(b,?c,?d,?a,?x[3],?S14,?0xc1bdceee);????/**//*?4?*/
208
209????FF(a,?b,?c,?d,?x[4],?S11,?0xf57c0faf);????/**//*?5?*/
210
211????FF(d,?a,?b,?c,?x[5],?S12,?0x4787c62a);????/**//*?6?*/
212
213????FF(c,?d,?a,?b,?x[6],?S13,?0xa8304613);????/**//*?7?*/
214
215????FF(b,?c,?d,?a,?x[7],?S14,?0xfd469501);????/**//*?8?*/
216
217????FF(a,?b,?c,?d,?x[8],?S11,?0x698098d8);????/**//*?9?*/
218
219????FF(d,?a,?b,?c,?x[9],?S12,?0x8b44f7af);????/**//*?10?*/
220
221????FF(c,?d,?a,?b,?x[10],?S13,?0xffff5bb1);???/**//*?11?*/
222
223????FF(b,?c,?d,?a,?x[11],?S14,?0x895cd7be);???/**//*?12?*/
224
225????FF(a,?b,?c,?d,?x[12],?S11,?0x6b901122);???/**//*?13?*/
226
227????FF(d,?a,?b,?c,?x[13],?S12,?0xfd987193);???/**//*?14?*/
228
229????FF(c,?d,?a,?b,?x[14],?S13,?0xa679438e);???/**//*?15?*/
230
231????FF(b,?c,?d,?a,?x[15],?S14,?0x49b40821);???/**//*?16?*/
232
233?
234
235????/**//*?Round?2?*/
236
237????GG(a,?b,?c,?d,?x[1],?S21,?0xf61e2562);????/**//*?17?*/
238
239????GG(d,?a,?b,?c,?x[6],?S22,?0xc040b340);????/**//*?18?*/
240
241????GG(c,?d,?a,?b,?x[11],?S23,?0x265e5a51);???/**//*?19?*/
242
243????GG(b,?c,?d,?a,?x[0],?S24,?0xe9b6c7aa);????/**//*?20?*/
244
245????GG(a,?b,?c,?d,?x[5],?S21,?0xd62f105d);????/**//*?21?*/
246
247????GG(d,?a,?b,?c,?x[10],?S22,?0x2441453);????/**//*?22?*/
248
249????GG(c,?d,?a,?b,?x[15],?S23,?0xd8a1e681);???/**//*?23?*/
250
251????GG(b,?c,?d,?a,?x[4],?S24,?0xe7d3fbc8);????/**//*?24?*/
252
253????GG(a,?b,?c,?d,?x[9],?S21,?0x21e1cde6);????/**//*?25?*/
254
255????GG(d,?a,?b,?c,?x[14],?S22,?0xc33707d6);???/**//*?26?*/
256
257????GG(c,?d,?a,?b,?x[3],?S23,?0xf4d50d87);????/**//*?27?*/
258
259????GG(b,?c,?d,?a,?x[8],?S24,?0x455a14ed);????/**//*?28?*/
260
261????GG(a,?b,?c,?d,?x[13],?S21,?0xa9e3e905);???/**//*?29?*/
262
263????GG(d,?a,?b,?c,?x[2],?S22,?0xfcefa3f8);????/**//*?30?*/
264
265????GG(c,?d,?a,?b,?x[7],?S23,?0x676f02d9);????/**//*?31?*/
266
267????GG(b,?c,?d,?a,?x[12],?S24,?0x8d2a4c8a);???/**//*?32?*/
268
269?
270
271????/**//*?Round?3?*/
272
273????HH(a,?b,?c,?d,?x[5],?S31,?0xfffa3942);????/**//*?33?*/
274
275????HH(d,?a,?b,?c,?x[8],?S32,?0x8771f681);????/**//*?34?*/
276
277????HH(c,?d,?a,?b,?x[11],?S33,?0x6d9d6122);???/**//*?35?*/
278
279????HH(b,?c,?d,?a,?x[14],?S34,?0xfde5380c);???/**//*?36?*/
280
281????HH(a,?b,?c,?d,?x[1],?S31,?0xa4beea44);????/**//*?37?*/
282
283????HH(d,?a,?b,?c,?x[4],?S32,?0x4bdecfa9);????/**//*?38?*/
284
285????HH(c,?d,?a,?b,?x[7],?S33,?0xf6bb4b60);????/**//*?39?*/
286
287????HH(b,?c,?d,?a,?x[10],?S34,?0xbebfbc70);???/**//*?40?*/
288
289????HH(a,?b,?c,?d,?x[13],?S31,?0x289b7ec6);???/**//*?41?*/
290
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