image.png
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>测试</title>
<script type="text/ecmascript" src="sha1.js"></script>
<script>
// 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 displayDate(){
var sha = SHA1(document.getElementById("txt").value)
document.getElementById("ciphertext").innerHTML=sha
}
</script>
</head>
<body>
<h1>SHA1加密</h1>
<input id="txt" type="text">
<button type="button" onclick="displayDate()">加密</button>
<p id="ciphertext">这里显示加密后的字符串</p>
</body>
</html>
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