mds加密

var rotateLeft = function(lValue, iShiftBits) {

return(lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));

}

var addUnsigned = function(lX, lY) {

var lX4, lY4, lX8, lY8, lResult;

lX8 = (lX & 0x80000000);

lY8 = (lY & 0x80000000);

lX4 = (lX & 0x40000000);

lY4 = (lY & 0x40000000);

lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);

if(lX4 & lY4) return(lResult ^ 0x80000000 ^ lX8 ^ lY8);

if(lX4 | lY4) {

if(lResult & 0x40000000) return(lResult ^ 0xC0000000 ^ lX8 ^ lY8);

else return(lResult ^ 0x40000000 ^ lX8 ^ lY8);

} else {

return(lResult ^ lX8 ^ lY8);

}

}

var F = function(x, y, z) {

return(x & y) | ((~x) & z);

}

var G = function(x, y, z) {

return(x & z) | (y & (~z));

}

var H = function(x, y, z) {

return(x ^ y ^ z);

}

var I = function(x, y, z) {

return(y ^ (x | (~z)));

}

var FF = function(a, b, c, d, x, s, ac) {

a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac));

return addUnsigned(rotateLeft(a, s), b);

};

var GG = function(a, b, c, d, x, s, ac) {

a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac));

return addUnsigned(rotateLeft(a, s), b);

};

var HH = function(a, b, c, d, x, s, ac) {

a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac));

return addUnsigned(rotateLeft(a, s), b);

};

var II = function(a, b, c, d, x, s, ac) {

a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac));

return addUnsigned(rotateLeft(a, s), b);

};

var convertToWordArray = function(string) {

var lWordCount;

var lMessageLength = string.length;

var lNumberOfWordsTempOne = lMessageLength + 8;

var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64;

var lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16;

var lWordArray = Array(lNumberOfWords - 1);

var lBytePosition = 0;

var lByteCount = 0;

while(lByteCount < lMessageLength) {

lWordCount = (lByteCount - (lByteCount % 4)) / 4;

lBytePosition = (lByteCount % 4) * 8;

lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));

lByteCount++;

}

lWordCount = (lByteCount - (lByteCount % 4)) / 4;

lBytePosition = (lByteCount % 4) * 8;

lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);

lWordArray[lNumberOfWords - 2] = lMessageLength << 3;

lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;

return lWordArray;

};

var wordToHex = function(lValue) {

var WordToHexValue = "",

WordToHexValueTemp = "",

lByte, lCount;

for(lCount = 0; lCount <= 3; lCount++) {

lByte = (lValue >>> (lCount * 8)) & 255;

WordToHexValueTemp = "0" + lByte.toString(16);

WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2);

}

return WordToHexValue;

};

var uTF8Encode = function(string) {

string = string.replace(/\x0d\x0a/g, "\x0a");

var output = "";

for(var n = 0; n < string.length; n++) {

var c = string.charCodeAt(n);

if(c < 128) {

output += String.fromCharCode(c);

} else if((c > 127) && (c < 2048)) {

output += String.fromCharCode((c >> 6) | 192);

output += String.fromCharCode((c & 63) | 128);

} else {

output += String.fromCharCode((c >> 12) | 224);

output += String.fromCharCode(((c >> 6) & 63) | 128);

output += String.fromCharCode((c & 63) | 128);

}

}

return output;

};

function md5(string) {

var x = Array();

var k, AA, BB, CC, DD, a, b, c, d;

var S11 = 7,

S12 = 12,

S13 = 17,

S14 = 22;

var S21 = 5,

S22 = 9,

S23 = 14,

S24 = 20;

var S31 = 4,

S32 = 11,

S33 = 16,

S34 = 23;

var S41 = 6,

S42 = 10,

S43 = 15,

S44 = 21;

string = uTF8Encode(string);

x = convertToWordArray(string);

a = 0x67452301;

b = 0xEFCDAB89;

c = 0x98BADCFE;

d = 0x10325476;

for(k = 0; k < x.length; k += 16) {

AA = a;

BB = b;

CC = c;

DD = d;

a = FF(a, b, c, d, x[k + 0], S11, 0xD76AA478);

d = FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);

c = FF(c, d, a, b, x[k + 2], S13, 0x242070DB);

b = FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);

a = FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);

d = FF(d, a, b, c, x[k + 5], S12, 0x4787C62A);

c = FF(c, d, a, b, x[k + 6], S13, 0xA8304613);

b = FF(b, c, d, a, x[k + 7], S14, 0xFD469501);

a = FF(a, b, c, d, x[k + 8], S11, 0x698098D8);

d = FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);

c = FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);

b = FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);

a = FF(a, b, c, d, x[k + 12], S11, 0x6B901122);

d = FF(d, a, b, c, x[k + 13], S12, 0xFD987193);

c = FF(c, d, a, b, x[k + 14], S13, 0xA679438E);

b = FF(b, c, d, a, x[k + 15], S14, 0x49B40821);

a = GG(a, b, c, d, x[k + 1], S21, 0xF61E2562);

d = GG(d, a, b, c, x[k + 6], S22, 0xC040B340);

c = GG(c, d, a, b, x[k + 11], S23, 0x265E5A51);

b = GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);

a = GG(a, b, c, d, x[k + 5], S21, 0xD62F105D);

d = GG(d, a, b, c, x[k + 10], S22, 0x2441453);

c = GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);

b = GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);

a = GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);

d = GG(d, a, b, c, x[k + 14], S22, 0xC33707D6);

c = GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);

b = GG(b, c, d, a, x[k + 8], S24, 0x455A14ED);

a = GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);

d = GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);

c = GG(c, d, a, b, x[k + 7], S23, 0x676F02D9);

b = GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);

a = HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);

d = HH(d, a, b, c, x[k + 8], S32, 0x8771F681);

c = HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);

b = HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);

a = HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);

d = HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);

c = HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);

b = HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);

a = HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);

d = HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);

c = HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);

b = HH(b, c, d, a, x[k + 6], S34, 0x4881D05);

a = HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);

d = HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);

c = HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);

b = HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);

a = II(a, b, c, d, x[k + 0], S41, 0xF4292244);

d = II(d, a, b, c, x[k + 7], S42, 0x432AFF97);

c = II(c, d, a, b, x[k + 14], S43, 0xAB9423A7);

b = II(b, c, d, a, x[k + 5], S44, 0xFC93A039);

a = II(a, b, c, d, x[k + 12], S41, 0x655B59C3);

d = II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);

c = II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);

b = II(b, c, d, a, x[k + 1], S44, 0x85845DD1);

a = II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);

d = II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);

c = II(c, d, a, b, x[k + 6], S43, 0xA3014314);

b = II(b, c, d, a, x[k + 13], S44, 0x4E0811A1);

a = II(a, b, c, d, x[k + 4], S41, 0xF7537E82);

d = II(d, a, b, c, x[k + 11], S42, 0xBD3AF235);

c = II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);

b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391);

a = addUnsigned(a, AA);

b = addUnsigned(b, BB);

c = addUnsigned(c, CC);

d = addUnsigned(d, DD);

}

var tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);

return tempValue.toLowerCase();

}

module.exports.md5 = md5

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