84 lines
2.5 KiB
JavaScript
84 lines
2.5 KiB
JavaScript
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// SHA1
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function add(x, y) {
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return((x & 0x7FFFFFFF) + (y & 0x7FFFFFFF)) ^ (x & 0x80000000) ^ (y & 0x80000000);
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}
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function SHA1hex(num) {
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var sHEXChars = "0123456789abcdef";
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var str = "";
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for(var j = 7; j >= 0; j--)
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str += sHEXChars.charAt((num >> (j * 4)) & 0x0F);
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return str;
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}
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function AlignSHA1(sIn) {
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var nblk = ((sIn.length + 8) >> 6) + 1,
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blks = new Array(nblk * 16);
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for(var i = 0; i < nblk * 16; i++) blks[i] = 0;
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for(i = 0; i < sIn.length; i++)
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blks[i >> 2] |= sIn.charCodeAt(i) << (24 - (i & 3) * 8);
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blks[i >> 2] |= 0x80 << (24 - (i & 3) * 8);
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blks[nblk * 16 - 1] = sIn.length * 8;
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return blks;
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}
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function rol(num, cnt) {
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return(num << cnt) | (num >>> (32 - cnt));
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}
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function ft(t, b, c, d) {
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if(t < 20) return(b & c) | ((~b) & d);
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if(t < 40) return b ^ c ^ d;
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if(t < 60) return(b & c) | (b & d) | (c & d);
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return b ^ c ^ d;
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}
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function kt(t) {
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return(t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
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(t < 60) ? -1894007588 : -899497514;
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}
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function SHA1(sIn) {
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var x = AlignSHA1(sIn);
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var w = new Array(80);
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var a = 1732584193;
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var b = -271733879;
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var c = -1732584194;
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var d = 271733878;
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var e = -1009589776;
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for(var i = 0; i < x.length; i += 16) {
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var olda = a;
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var oldb = b;
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var oldc = c;
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var oldd = d;
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var olde = e;
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for(var j = 0; j < 80; j++) {
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if(j < 16) w[j] = x[i + j];
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else w[j] = rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
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t = add(add(rol(a, 5), ft(j, b, c, d)), add(add(e, w[j]), kt(j)));
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e = d;
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d = c;
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c = rol(b, 30);
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b = a;
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a = t;
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}
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a = add(a, olda);
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b = add(b, oldb);
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c = add(c, oldc);
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d = add(d, oldd);
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e = add(e, olde);
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}
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SHA1Value = SHA1hex(a) + SHA1hex(b) + SHA1hex(c) + SHA1hex(d) + SHA1hex(e);
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return SHA1Value.toUpperCase();
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}
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function SALT() {
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var a=['0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
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var code="";
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for(var i=0;i<4;i++){
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//0-1的随机小数 --> 0~数组长度-1的范围 取整
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var randPosition = Math.floor(Math.random()*(a.length-1)); //每次生成一个随机数的位置
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code += a[randPosition];//带有随机位置作为下标，指示到当前随机产生的某个字符上，
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}
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return code;
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}
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