1 <script language="JavaScript">
2 var sAscii = " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ"
3 var sAscii = sAscii + "[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~";
4 var sHex = "0123456789ABCDEF";
5 function hex(i)
6 {
7 h = "";
8 for(j = 0; j <= 3; j++)
9 {
10 h += sHex.charAt((i >> (j * 8 + 4)) & 0x0F) +
11 sHex.charAt((i >> (j * 8)) & 0x0F);
12 }
13 return h;
14 }
15 /* add, handling overflows correctly */
16 function add(x, y) {
17 return ((x&0x7FFFFFFF) + (y&0x7FFFFFFF)) ^ (x&0x80000000) ^ (y&0x80000000);
18 }
19 /* MD5 rounds functions */
20 function R1(A, B, C, D, X, S, T) {
21 q = add(add(A, (B & C) | (~B & D)), add(X, T));
22 return add((q << S) | ((q >> (32 - S)) & (Math.pow(2, S) - 1)), B);
23 }
24
25 function R2(A, B, C, D, X, S, T) {
26 q = add(add(A, (B & D) | (C & ~D)), add(X, T));
27 return add((q << S) | ((q >> (32 - S)) & (Math.pow(2, S) - 1)), B);
28 }
29
30 function R3(A, B, C, D, X, S, T) {
31 q = add(add(A, B ^ C ^ D), add(X, T));
32 return add((q << S) | ((q >> (32 - S)) & (Math.pow(2, S) - 1)), B);
33 }
34
35 function R4(A, B, C, D, X, S, T) {
36 q = add(add(A, C ^ (B | ~D)), add(X, T));
37 return add((q << S) | ((q >> (32 - S)) & (Math.pow(2, S) - 1)), B);
38 }
39
40 /* main entry point */
41 function calcMD5(sInp) {
42
43 /* Calculate length in machine words, including padding */
44 wLen = (((sInp.length + 8) >> 6) + 1) << 4;
45 var X = new Array(wLen);
46
47 /* Convert string to array of words */
48 j = 4;
49 for (i = 0; (i * 4) < sInp.length; i++) {
50 X[i] = 0;
51 for (j = 0; (j < 4) && ((j + i * 4) < sInp.length); j++) {
52 X[i] += (sAscii.indexOf(sInp.charAt((i * 4) + j)) + 32) << (j * 8);
53 }
54 }
55
56 /* Append padding bits and length */
57 if (j == 4) {
58 X[i++] = 0x80;
59 }
60 else {
61 X[i - 1] += 0x80 << (j * 8);
62 }
63 for(; i < wLen; i++) {
64 X[i] = 0;
65 }
66 X[wLen - 2] = sInp.length * 8;
67
68 /* hard-coded initial values */
69 a = 0x67452301;
70 b = 0xefcdab89;
71 c = 0x98badcfe;
72 d = 0x10325476;
73
74 /* Process each 16-word block in turn */
75 for (i = 0; i < wLen; i += 16) {
76 aO = a;
77 bO = b;
78 cO = c;
79 dO = d;
80
81 a = R1(a, b, c, d, X[i+ 0], 7 , 0xd76aa478);
82 d = R1(d, a, b, c, X[i+ 1], 12, 0xe8c7b756);
83 c = R1(c, d, a, b, X[i+ 2], 17, 0x242070db);
84 b = R1(b, c, d, a, X[i+ 3], 22, 0xc1bdceee);
85 a = R1(a, b, c, d, X[i+ 4], 7 , 0xf57c0faf);
86 d = R1(d, a, b, c, X[i+ 5], 12, 0x4787c62a);
87 c = R1(c, d, a, b, X[i+ 6], 17, 0xa8304613);
88 b = R1(b, c, d, a, X[i+ 7], 22, 0xfd469501);
89 a = R1(a, b, c, d, X[i+ 8], 7 , 0x698098d8);
90 d = R1(d, a, b, c, X[i+ 9], 12, 0x8b44f7af);
91 c = R1(c, d, a, b, X[i+10], 17, 0xffff5bb1);
92 b = R1(b, c, d, a, X[i+11], 22, 0x895cd7be);
93 a = R1(a, b, c, d, X[i+12], 7 , 0x6b901122);
94 d = R1(d, a, b, c, X[i+13], 12, 0xfd987193);
95 c = R1(c, d, a, b, X[i+14], 17, 0xa679438e);
96 b = R1(b, c, d, a, X[i+15], 22, 0x49b40821);
97
98 a = R2(a, b, c, d, X[i+ 1], 5 , 0xf61e2562);
99 d = R2(d, a, b, c, X[i+ 6], 9 , 0xc040b340);
100 c = R2(c, d, a, b, X[i+11], 14, 0x265e5a51);
101 b = R2(b, c, d, a, X[i+ 0], 20, 0xe9b6c7aa);
102 a = R2(a, b, c, d, X[i+ 5], 5 , 0xd62f105d);
103 d = R2(d, a, b, c, X[i+10], 9 , 0x2441453);
104 c = R2(c, d, a, b, X[i+15], 14, 0xd8a1e681);
105 b = R2(b, c, d, a, X[i+ 4], 20, 0xe7d3fbc8);
106 a = R2(a, b, c, d, X[i+ 9], 5 , 0x21e1cde6);
107 d = R2(d, a, b, c, X[i+14], 9 , 0xc33707d6);
108 c = R2(c, d, a, b, X[i+ 3], 14, 0xf4d50d87);
109 b = R2(b, c, d, a, X[i+ 8], 20, 0x455a14ed);
110 a = R2(a, b, c, d, X[i+13], 5 , 0xa9e3e905);
111 d = R2(d, a, b, c, X[i+ 2], 9 , 0xfcefa3f8);
112 c = R2(c, d, a, b, X[i+ 7], 14, 0x676f02d9);
113 b = R2(b, c, d, a, X[i+12], 20, 0x8d2a4c8a);
114 a = R3(a, b, c, d, X[i+ 5], 4 , 0xfffa3942);
115 d = R3(d, a, b, c, X[i+ 8], 11, 0x8771f681);
116 c = R3(c, d, a, b, X[i+11], 16, 0x6d9d6122);
117 b = R3(b, c, d, a, X[i+14], 23, 0xfde5380c);
118 a = R3(a, b, c, d, X[i+ 1], 4 , 0xa4beea44);
119 d = R3(d, a, b, c, X[i+ 4], 11, 0x4bdecfa9);
120 c = R3(c, d, a, b, X[i+ 7], 16, 0xf6bb4b60);
121 b = R3(b, c, d, a, X[i+10], 23, 0xbebfbc70);
122 a = R3(a, b, c, d, X[i+13], 4 , 0x289b7ec6);
123 d = R3(d, a, b, c, X[i+ 0], 11, 0xeaa127fa);
124 c = R3(c, d, a, b, X[i+ 3], 16, 0xd4ef3085);
125 b = R3(b, c, d, a, X[i+ 6], 23, 0x4881d05);
126 a = R3(a, b, c, d, X[i+ 9], 4 , 0xd9d4d039);
127 d = R3(d, a, b, c, X[i+12], 11, 0xe6db99e5);
128 c = R3(c, d, a, b, X[i+15], 16, 0x1fa27cf8);
129 b = R3(b, c, d, a, X[i+ 2], 23, 0xc4ac5665);
130 a = R4(a, b, c, d, X[i+ 0], 6 , 0xf4292244);
131 d = R4(d, a, b, c, X[i+ 7], 10, 0x432aff97);
132 c = R4(c, d, a, b, X[i+14], 15, 0xab9423a7);
133 b = R4(b, c, d, a, X[i+ 5], 21, 0xfc93a039);
134 a = R4(a, b, c, d, X[i+12], 6 , 0x655b59c3);
135 d = R4(d, a, b, c, X[i+ 3], 10, 0x8f0ccc92);
136 c = R4(c, d, a, b, X[i+10], 15, 0xffeff47d);
137 b = R4(b, c, d, a, X[i+ 1], 21, 0x85845dd1);
138 a = R4(a, b, c, d, X[i+ 8], 6 , 0x6fa87e4f);
139 d = R4(d, a, b, c, X[i+15], 10, 0xfe2ce6e0);
140 c = R4(c, d, a, b, X[i+ 6], 15, 0xa3014314);
141 b = R4(b, c, d, a, X[i+13], 21, 0x4e0811a1);
142 a = R4(a, b, c, d, X[i+ 4], 6 , 0xf7537e82);
143 d = R4(d, a, b, c, X[i+11], 10, 0xbd3af235);
144 c = R4(c, d, a, b, X[i+ 2], 15, 0x2ad7d2bb);
145 b = R4(b, c, d, a, X[i+ 9], 21, 0xeb86d391);
146 a = add(a, aO);
147 b = add(b, bO);
148 c = add(c, cO);
149 d = add(d, dO);
150 }
151 return hex(a) + hex(b) + hex(c) + hex(d);
152 }
153 </script>
154 <input type="text" id="m"><input type=button value="md5加密" onclick=alert(calcMD5(m.value))>
155
posted on 2007-02-07 09:49
-274°C 閱讀(546)
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