📄 md5加密的javascript实现例子.htm
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<BLOCKQUOTE><BR>/* MD5 Message-Digest Algorithm - JavaScript<BR>'
MODIFICATION HISTORY:<BR>' 1.0 16-Feb-2001 - Phil Fresle
(sales@frez.co.uk) - Initial Version (VB/ASP code)<BR>' 1.0
21-Feb-2001 - Enrico Mosanghini (erik504@yahoo.com) - JavaScript
porting<BR>*/<BR>function MD5(sMessage) {<BR>function
RotateLeft(lValue, iShiftBits) { return (lValue<<iShiftBits)
| (lValue>>>(32-iShiftBits)); }<BR>function
AddUnsigned(lX,lY) {<BR>var lX4,lY4,lX8,lY8,lResult;<BR>lX8 = (lX
& 0x80000000);<BR>lY8 = (lY & 0x80000000);<BR>lX4 = (lX
& 0x40000000);<BR>lY4 = (lY & 0x40000000);<BR>lResult =
(lX & 0x3FFFFFFF)+(lY & 0x3FFFFFFF);<BR>if (lX4 & lY4)
return (lResult ^ 0x80000000 ^ lX8 ^ lY8);<BR>if (lX4 | lY4)
{<BR>if (lResult & 0x40000000) return (lResult ^ 0xC0000000 ^
lX8 ^ lY8);<BR>else return (lResult ^ 0x40000000 ^ lX8 ^
lY8);<BR>} else return (lResult ^ lX8 ^ lY8);<BR>}<BR>function
F(x,y,z) { return (x & y) | ((~x) & z); }<BR>function
G(x,y,z) { return (x & z) | (y & (~z)); }<BR>function
H(x,y,z) { return (x ^ y ^ z); }<BR>function I(x,y,z) { return (y
^ (x | (~z))); }<BR>function FF(a,b,c,d,x,s,ac) {<BR>a =
AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x),
ac));<BR>return AddUnsigned(RotateLeft(a, s), b);<BR>}<BR>function
GG(a,b,c,d,x,s,ac) {<BR>a = AddUnsigned(a,
AddUnsigned(AddUnsigned(G(b, c, d), x), ac));<BR>return
AddUnsigned(RotateLeft(a, s), b);<BR>}<BR>function
HH(a,b,c,d,x,s,ac) {<BR>a = AddUnsigned(a,
AddUnsigned(AddUnsigned(H(b, c, d), x), ac));<BR>return
AddUnsigned(RotateLeft(a, s), b);<BR>}<BR>function
II(a,b,c,d,x,s,ac) {<BR>a = AddUnsigned(a,
AddUnsigned(AddUnsigned(I(b, c, d), x), ac));<BR>return
AddUnsigned(RotateLeft(a, s), b);<BR>}<BR>function
ConvertToWordArray(sMessage) {<BR>var lWordCount;<BR>var
lMessageLength = sMessage.length;<BR>var
lNumberOfWords_temp1=lMessageLength + 8;<BR>var
lNumberOfWords_temp2=(lNumberOfWords_temp1-(lNumberOfWords_temp1 %
64))/64;<BR>var lNumberOfWords =
(lNumberOfWords_temp2+1)*16;<BR>var
lWordArray=Array(lNumberOfWords-1);<BR>var lBytePosition =
0;<BR>var lByteCount = 0;<BR>while ( lByteCount <
lMessageLength ) {<BR>lWordCount = (lByteCount-(lByteCount %
4))/4;<BR>lBytePosition = (lByteCount %
4)*8;<BR>lWordArray[lWordCount] = (lWordArray[lWordCount] |
(sMessage.charCodeAt(lByteCount)<<lBytePosition));<BR>lByteCount++;<BR>}<BR>lWordCount
= (lByteCount-(lByteCount % 4))/4;<BR>lBytePosition = (lByteCount
% 4)*8;<BR>lWordArray[lWordCount] = lWordArray[lWordCount] |
(0x80<<lBytePosition);<BR>lWordArray[lNumberOfWords-2] =
lMessageLength<<3;<BR>lWordArray[lNumberOfWords-1] =
lMessageLength>>>29;<BR>return
lWordArray;<BR>}<BR>function WordToHex(lValue) {<BR>var
WordToHexValue="",WordToHexValue_temp="",lByte,lCount;<BR>for
(lCount = 0;lCount<=3;lCount++) {<BR>lByte =
(lValue>>>(lCount*8)) & 255;<BR>WordToHexValue_temp =
"0" + lByte.toString(16);<BR>WordToHexValue = WordToHexValue +
WordToHexValue_temp.substr(WordToHexValue_temp.length-2,2);<BR>}<BR>return
WordToHexValue;<BR>}<BR>var x=Array();<BR>var
k,AA,BB,CC,DD,a,b,c,d<BR>var S11=7, S12=12, S13=17, S14=22;<BR>var
S21=5, S22=9 , S23=14, S24=20;<BR>var S31=4, S32=11, S33=16,
S34=23;<BR>var S41=6, S42=10, S43=15, S44=21;<BR>// Steps 1 and 2.
Append padding bits and length and convert to words<BR>x =
ConvertToWordArray(sMessage);<BR>// Step 3. Initialise<BR>a =
0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;<BR>//
Step 4. Process the message in 16-word blocks<BR>for
(k=0;k<x.length;k+=16) {<BR>AA=a; BB=b; CC=c;
DD=d;<BR>a=FF(a,b,c,d,x[k+0],
S11,0xD76AA478);<BR>d=FF(d,a,b,c,x[k+1],
S12,0xE8C7B756);<BR>c=FF(c,d,a,b,x[k+2],
S13,0x242070DB);<BR>b=FF(b,c,d,a,x[k+3],
S14,0xC1BDCEEE);<BR>a=FF(a,b,c,d,x[k+4],
S11,0xF57C0FAF);<BR>d=FF(d,a,b,c,x[k+5],
S12,0x4787C62A);<BR>c=FF(c,d,a,b,x[k+6],
S13,0xA8304613);<BR>b=FF(b,c,d,a,x[k+7],
S14,0xFD469501);<BR>a=FF(a,b,c,d,x[k+8],
S11,0x698098D8);<BR>d=FF(d,a,b,c,x[k+9],
S12,0x8B44F7AF);<BR>c=FF(c,d,a,b,x[k+10],S13,0xFFFF5BB1);<BR>b=FF(b,c,d,a,x[k+11],S14,0x895CD7BE);<BR>a=FF(a,b,c,d,x[k+12],S11,0x6B901122);<BR>d=FF(d,a,b,c,x[k+13],S12,0xFD987193);<BR>c=FF(c,d,a,b,x[k+14],S13,0xA679438E);<BR>b=FF(b,c,d,a,x[k+15],S14,0x49B40821);<BR>a=GG(a,b,c,d,x[k+1],
S21,0xF61E2562);<BR>d=GG(d,a,b,c,x[k+6],
S22,0xC040B340);<BR>c=GG(c,d,a,b,x[k+11],S23,0x265E5A51);<BR>b=GG(b,c,d,a,x[k+0],
S24,0xE9B6C7AA);<BR>a=GG(a,b,c,d,x[k+5],
S21,0xD62F105D);<BR>d=GG(d,a,b,c,x[k+10],S22,0x2441453);<BR>c=GG(c,d,a,b,x[k+15],S23,0xD8A1E681);<BR>b=GG(b,c,d,a,x[k+4],
S24,0xE7D3FBC8);<BR>a=GG(a,b,c,d,x[k+9],
S21,0x21E1CDE6);<BR>d=GG(d,a,b,c,x[k+14],S22,0xC33707D6);<BR>c=GG(c,d,a,b,x[k+3],
S23,0xF4D50D87);<BR>b=GG(b,c,d,a,x[k+8],
S24,0x455A14ED);<BR>a=GG(a,b,c,d,x[k+13],S21,0xA9E3E905);<BR>d=GG(d,a,b,c,x[k+2],
S22,0xFCEFA3F8);<BR>c=GG(c,d,a,b,x[k+7],
S23,0x676F02D9);<BR>b=GG(b,c,d,a,x[k+12],S24,0x8D2A4C8A);<BR>a=HH(a,b,c,d,x[k+5],
S31,0xFFFA3942);<BR>d=HH(d,a,b,c,x[k+8],
S32,0x8771F681);<BR>c=HH(c,d,a,b,x[k+11],S33,0x6D9D6122);<BR>b=HH(b,c,d,a,x[k+14],S34,0xFDE5380C);<BR>a=HH(a,b,c,d,x[k+1],
S31,0xA4BEEA44);<BR>d=HH(d,a,b,c,x[k+4],
S32,0x4BDECFA9);<BR>c=HH(c,d,a,b,x[k+7],
S33,0xF6BB4B60);<BR>b=HH(b,c,d,a,x[k+10],S34,0xBEBFBC70);<BR>a=HH(a,b,c,d,x[k+13],S31,0x289B7EC6);<BR>d=HH(d,a,b,c,x[k+0],
S32,0xEAA127FA);<BR>c=HH(c,d,a,b,x[k+3],
S33,0xD4EF3085);<BR>b=HH(b,c,d,a,x[k+6],
S34,0x4881D05);<BR>a=HH(a,b,c,d,x[k+9],
S31,0xD9D4D039);<BR>d=HH(d,a,b,c,x[k+12],S32,0xE6DB99E5);<BR>c=HH(c,d,a,b,x[k+15],S33,0x1FA27CF8);<BR>b=HH(b,c,d,a,x[k+2],
S34,0xC4AC5665);<BR>a=II(a,b,c,d,x[k+0],
S41,0xF4292244);<BR>d=II(d,a,b,c,x[k+7],
S42,0x432AFF97);<BR>c=II(c,d,a,b,x[k+14],S43,0xAB9423A7);<BR>b=II(b,c,d,a,x[k+5],
S44,0xFC93A039);<BR>a=II(a,b,c,d,x[k+12],S41,0x655B59C3);<BR>d=II(d,a,b,c,x[k+3],
S42,0x8F0CCC92);<BR>c=II(c,d,a,b,x[k+10],S43,0xFFEFF47D);<BR>b=II(b,c,d,a,x[k+1],
S44,0x85845DD1);<BR>a=II(a,b,c,d,x[k+8],
S41,0x6FA87E4F);<BR>d=II(d,a,b,c,x[k+15],S42,0xFE2CE6E0);<BR>c=II(c,d,a,b,x[k+6],
S43,0xA3014314);<BR>b=II(b,c,d,a,x[k+13],S44,0x4E0811A1);<BR>a=II(a,b,c,d,x[k+4],
S41,0xF7537E82);<BR>d=II(d,a,b,c,x[k+11],S42,0xBD3AF235);<BR>c=II(c,d,a,b,x[k+2],
S43,0x2AD7D2BB);<BR>b=II(b,c,d,a,x[k+9],
S44,0xEB86D391);<BR>a=AddUnsigned(a,AA); b=AddUnsigned(b,BB);
c=AddUnsigned(c,CC); d=AddUnsigned(d,DD);<BR>}<BR>// Step 5.
Output the 128 bit digest<BR>var temp=
WordToHex(a)+WordToHex(b)+WordToHex(c)+WordToHex(d);<BR>return
temp.toLowerCase();<BR>} <BR><BR></BLOCKQUOTE></TD></TR>
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<BLOCKQUOTE>原作者：netnice(转)<BR>来 源：开发者俱乐部<BR>共有3964位读者阅读过此文<BR>【<A
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