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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 | */ | ||
6 | function 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 | } | ||