SHA1

// SHA1 function add(x, y) {

return((x & 0x7FFFFFFF) + (y & 0x7FFFFFFF)) ^ (x & 0x80000000) ^ (y & 0x80000000); }

function SHA1hex(num) {

var sHEXChars = "0123456789abcdef";

var str = "";

for(var j = 7; j >= 0; j--)

str += sHEXChars.charAt((num >> (j * 4)) & 0x0F);

return str; }

function AlignSHA1(sIn) {

var nblk = ((sIn.length + 8) >> 6) + 1,

blks = new Array(nblk * 16);

for(var i = 0; i < nblk * 16; i++) blks[i] = 0;

for(i = 0; i < sIn.length; i++) blks[i >> 2] |= sIn.charCodeAt(i) << (24 - (i & 3) * 8);

blks[i >> 2] |= 0x80 << (24 - (i & 3) * 8);

blks[nblk * 16 - 1] = sIn.length * 8;

return blks; }

function rol(num, cnt) {

return(num << cnt) | (num >>> (32 - cnt));

}

function ft(t, b, c, d) {

if(t < 20) return(b & c) | ((~b) & d);

if(t < 40) return b ^ c ^ d;

if(t < 60) return(b & c) | (b & d) | (c & d); return b ^ c ^ d; }

function kt(t) {

return(t < 20) ? 1518500249 : (t < 40) ? 1859775393 :

(t < 60) ? -1894007588 : -899497514; }

function SHA1(sIn) {

var x = AlignSHA1(sIn);

var w = new Array(80);

var a = 1732584193; var b = -271733879;

var c = -1732584194;

var d = 271733878;

var e = -1009589776;

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

var olda = a;

var oldb = b; var oldc = c;

var oldd = d; var olde = e;

for(var j = 0; j < 80; j++) {

if(j < 16) w[j] = x[i + j];

else w[j] = rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);

t = add(add(rol(a, 5), ft(j, b, c, d)), add(add(e, w[j]), kt(j)));

e = d; d = c; c = rol(b, 30);

b = a; a = t; } a = add(a, olda); b = add(b, oldb); c = add(c, oldc); d = add(d, oldd); e = add(e, olde); } SHA1Value = SHA1hex(a) + SHA1hex(b) + SHA1hex(c) + SHA1hex(d) + SHA1hex(e); return SHA1Value.toUpperCase(); } function SHA2(sIn) { return SHA1(sIn).toLowerCase(); } 调用方法:[javascript] view plain copySHA1("要加密的字符串")