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1/* MD5 Message-Digest Algorithm - JavaScript
2' MODIFICATION HISTORY:
3' 1.0 16-Feb-2001 - Phil Fresle (sales@frez.co.uk) - Initial Version (VB/ASP code)
4' 1.0 21-Feb-2001 - Enrico Mosanghini (erik504@yahoo.com) - JavaScript porting
5*/
6function MD5(sMessage) {
7 function RotateLeft(lValue, iShiftBits) { return (lValue<<iShiftBits) | (lValue>>>(32-iShiftBits)); }
8 function AddUnsigned(lX,lY) {
9 var lX4,lY4,lX8,lY8,lResult;
10 lX8 = (lX & 0x80000000);
11 lY8 = (lY & 0x80000000);
12 lX4 = (lX & 0x40000000);
13 lY4 = (lY & 0x40000000);
14 lResult = (lX & 0x3FFFFFFF)+(lY & 0x3FFFFFFF);
15 if (lX4 & lY4) return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
16 if (lX4 | lY4) {
17 if (lResult & 0x40000000) return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
18 else return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
19 } else return (lResult ^ lX8 ^ lY8);
20 }
21 function F(x,y,z) { return (x & y) | ((~x) & z); }
22 function G(x,y,z) { return (x & z) | (y & (~z)); }
23 function H(x,y,z) { return (x ^ y ^ z); }
24 function I(x,y,z) { return (y ^ (x | (~z))); }
25 function FF(a,b,c,d,x,s,ac) {
26 a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));
27 return AddUnsigned(RotateLeft(a, s), b);
28 }
29 function GG(a,b,c,d,x,s,ac) {
30 a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));
31 return AddUnsigned(RotateLeft(a, s), b);
32 }
33 function HH(a,b,c,d,x,s,ac) {
34 a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));
35 return AddUnsigned(RotateLeft(a, s), b);
36 }
37 function II(a,b,c,d,x,s,ac) {
38 a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));
39 return AddUnsigned(RotateLeft(a, s), b);
40 }
41 function ConvertToWordArray(sMessage) {
42 var lWordCount;
43 var lMessageLength = sMessage.length;
44 var lNumberOfWords_temp1=lMessageLength + 8;
45 var lNumberOfWords_temp2=(lNumberOfWords_temp1-(lNumberOfWords_temp1 % 64))/64;
46 var lNumberOfWords = (lNumberOfWords_temp2+1)*16;
47 var lWordArray=Array(lNumberOfWords-1);
48 var lBytePosition = 0;
49 var lByteCount = 0;
50 while ( lByteCount < lMessageLength ) {
51 lWordCount = (lByteCount-(lByteCount % 4))/4;
52 lBytePosition = (lByteCount % 4)*8;
53 lWordArray[lWordCount] = (lWordArray[lWordCount] | (sMessage.charCodeAt(lByteCount)<<lBytePosition));
54 lByteCount++;
55 }
56 lWordCount = (lByteCount-(lByteCount % 4))/4;
57 lBytePosition = (lByteCount % 4)*8;
58 lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80<<lBytePosition);
59 lWordArray[lNumberOfWords-2] = lMessageLength<<3;
60 lWordArray[lNumberOfWords-1] = lMessageLength>>>29;
61 return lWordArray;
62 }
63 function WordToHex(lValue) {
64 var WordToHexValue="",WordToHexValue_temp="",lByte,lCount;
65 for (lCount = 0;lCount<=3;lCount++) {
66 lByte = (lValue>>>(lCount*8)) & 255;
67 WordToHexValue_temp = "0" + lByte.toString(16);
68 WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length-2,2);
69 }
70 return WordToHexValue;
71 }
72 var x=Array();
73 var k,AA,BB,CC,DD,a,b,c,d
74 var S11=7, S12=12, S13=17, S14=22;
75 var S21=5, S22=9 , S23=14, S24=20;
76 var S31=4, S32=11, S33=16, S34=23;
77 var S41=6, S42=10, S43=15, S44=21;
78 // Steps 1 and 2. Append padding bits and length and convert to words
79 x = ConvertToWordArray(sMessage);
80 // Step 3. Initialise
81 a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;
82 // Step 4. Process the message in 16-word blocks
83 for (k=0;k<x.length;k+=16) {
84 AA=a; BB=b; CC=c; DD=d;
85 a=FF(a,b,c,d,x[k+0], S11,0xD76AA478);
86 d=FF(d,a,b,c,x[k+1], S12,0xE8C7B756);
87 c=FF(c,d,a,b,x[k+2], S13,0x242070DB);
88 b=FF(b,c,d,a,x[k+3], S14,0xC1BDCEEE);
89 a=FF(a,b,c,d,x[k+4], S11,0xF57C0FAF);
90 d=FF(d,a,b,c,x[k+5], S12,0x4787C62A);
91 c=FF(c,d,a,b,x[k+6], S13,0xA8304613);
92 b=FF(b,c,d,a,x[k+7], S14,0xFD469501);
93 a=FF(a,b,c,d,x[k+8], S11,0x698098D8);
94 d=FF(d,a,b,c,x[k+9], S12,0x8B44F7AF);
95 c=FF(c,d,a,b,x[k+10],S13,0xFFFF5BB1);
96 b=FF(b,c,d,a,x[k+11],S14,0x895CD7BE);
97 a=FF(a,b,c,d,x[k+12],S11,0x6B901122);
98 d=FF(d,a,b,c,x[k+13],S12,0xFD987193);
99 c=FF(c,d,a,b,x[k+14],S13,0xA679438E);
100 b=FF(b,c,d,a,x[k+15],S14,0x49B40821);
101 a=GG(a,b,c,d,x[k+1], S21,0xF61E2562);
102 d=GG(d,a,b,c,x[k+6], S22,0xC040B340);
103 c=GG(c,d,a,b,x[k+11],S23,0x265E5A51);
104 b=GG(b,c,d,a,x[k+0], S24,0xE9B6C7AA);
105 a=GG(a,b,c,d,x[k+5], S21,0xD62F105D);
106 d=GG(d,a,b,c,x[k+10],S22,0x2441453);
107 c=GG(c,d,a,b,x[k+15],S23,0xD8A1E681);
108 b=GG(b,c,d,a,x[k+4], S24,0xE7D3FBC8);
109 a=GG(a,b,c,d,x[k+9], S21,0x21E1CDE6);
110 d=GG(d,a,b,c,x[k+14],S22,0xC33707D6);
111 c=GG(c,d,a,b,x[k+3], S23,0xF4D50D87);
112 b=GG(b,c,d,a,x[k+8], S24,0x455A14ED);
113 a=GG(a,b,c,d,x[k+13],S21,0xA9E3E905);
114 d=GG(d,a,b,c,x[k+2], S22,0xFCEFA3F8);
115 c=GG(c,d,a,b,x[k+7], S23,0x676F02D9);
116 b=GG(b,c,d,a,x[k+12],S24,0x8D2A4C8A);
117 a=HH(a,b,c,d,x[k+5], S31,0xFFFA3942);
118 d=HH(d,a,b,c,x[k+8], S32,0x8771F681);
119 c=HH(c,d,a,b,x[k+11],S33,0x6D9D6122);
120 b=HH(b,c,d,a,x[k+14],S34,0xFDE5380C);
121 a=HH(a,b,c,d,x[k+1], S31,0xA4BEEA44);
122 d=HH(d,a,b,c,x[k+4], S32,0x4BDECFA9);
123 c=HH(c,d,a,b,x[k+7], S33,0xF6BB4B60);
124 b=HH(b,c,d,a,x[k+10],S34,0xBEBFBC70);
125 a=HH(a,b,c,d,x[k+13],S31,0x289B7EC6);
126 d=HH(d,a,b,c,x[k+0], S32,0xEAA127FA);
127 c=HH(c,d,a,b,x[k+3], S33,0xD4EF3085);
128 b=HH(b,c,d,a,x[k+6], S34,0x4881D05);
129 a=HH(a,b,c,d,x[k+9], S31,0xD9D4D039);
130 d=HH(d,a,b,c,x[k+12],S32,0xE6DB99E5);
131 c=HH(c,d,a,b,x[k+15],S33,0x1FA27CF8);
132 b=HH(b,c,d,a,x[k+2], S34,0xC4AC5665);
133 a=II(a,b,c,d,x[k+0], S41,0xF4292244);
134 d=II(d,a,b,c,x[k+7], S42,0x432AFF97);
135 c=II(c,d,a,b,x[k+14],S43,0xAB9423A7);
136 b=II(b,c,d,a,x[k+5], S44,0xFC93A039);
137 a=II(a,b,c,d,x[k+12],S41,0x655B59C3);
138 d=II(d,a,b,c,x[k+3], S42,0x8F0CCC92);
139 c=II(c,d,a,b,x[k+10],S43,0xFFEFF47D);
140 b=II(b,c,d,a,x[k+1], S44,0x85845DD1);
141 a=II(a,b,c,d,x[k+8], S41,0x6FA87E4F);
142 d=II(d,a,b,c,x[k+15],S42,0xFE2CE6E0);
143 c=II(c,d,a,b,x[k+6], S43,0xA3014314);
144 b=II(b,c,d,a,x[k+13],S44,0x4E0811A1);
145 a=II(a,b,c,d,x[k+4], S41,0xF7537E82);
146 d=II(d,a,b,c,x[k+11],S42,0xBD3AF235);
147 c=II(c,d,a,b,x[k+2], S43,0x2AD7D2BB);
148 b=II(b,c,d,a,x[k+9], S44,0xEB86D391);
149 a=AddUnsigned(a,AA); b=AddUnsigned(b,BB); c=AddUnsigned(c,CC); d=AddUnsigned(d,DD);
150 }
151 // Step 5. Output the 128 bit digest
152 var temp= WordToHex(a)+WordToHex(b)+WordToHex(c)+WordToHex(d);
153 return temp.toLowerCase();
154}