<html>
<head>
<script language="JavaScript">
var hexcase = 0;
var chrsz = 8;
function hex_sha1(s){
return binb2hex(core_sha1(AlignSHA1(s)));
}
function sha1_vm_test(){
return hex_sha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d";
}
function core_sha1(blockArray){
var x = blockArray; //append padding
var w = 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);
var t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)),
safe_add(safe_add(e, w[j]), sha1_kt(j)));
e = d;
d = c;
c = rol(b, 30);
b = a;
a = t;
}
a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);
e = safe_add(e, olde);
}
return new Array(a, b, c, d, e);
}
function sha1_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; //t<80
}
function sha1_kt(t){
return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
(t < 60) ? -1894007588 : -899497514;
}
function safe_add(x, y){
var lsw = (x & 0xFFFF) + (y & 0xFFFF);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}
function rol(num, cnt){
return (num << cnt) | (num >>> (32 - cnt));
}
function AlignSHA1(str){
var nblk=((str.length+8)>>6)+1, blks=new Array(nblk*16);
for(var i=0;i<nblk*16;i++)blks[i]=0;
for(i=0;i<str.length;i++)
blks[i>>2]|=str.charCodeAt(i)<<(24-(i&3)*8);
blks[i>>2]|=0x80<<(24-(i&3)*8);
blks[nblk*16-1]=str.length*8;
return blks;
}
function binb2hex(binarray){
var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
var str = "";
for(var i = 0; i < binarray.length * 4; i++){
str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) +
hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8 )) & 0xF);
}
return str;
}
function calcDigest(){
var digestM = hex_sha1(document.SHAForm.SourceMessage.value);
document.SHAForm.MessageDigest.value = digestM;
}
</script>
<title>SHA-1算法JavaScript实现</title>
</head>
<body>
<center>
<BR/>
<BR/>
<H2>SHA-1算法JavaScript实现</H2>
<BR/>
<form name="SHAForm"> 源消息:<input type="text" name="SourceMessage" size=40><BR> 消息摘要:<input type="text" name="MessageDigest" size=40> <P> <input type="button" value="计算消息摘要" onclick="calcDigest()"> </form> </body></html>
在补完长度以后是怎么把字符串计算成a,b,c,d,e的,请大侠们指点指点,最好能举例说明,谢谢!
<head>
<script language="JavaScript">
var hexcase = 0;
var chrsz = 8;
function hex_sha1(s){
return binb2hex(core_sha1(AlignSHA1(s)));
}
function sha1_vm_test(){
return hex_sha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d";
}
function core_sha1(blockArray){
var x = blockArray; //append padding
var w = 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);
var t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)),
safe_add(safe_add(e, w[j]), sha1_kt(j)));
e = d;
d = c;
c = rol(b, 30);
b = a;
a = t;
}
a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);
e = safe_add(e, olde);
}
return new Array(a, b, c, d, e);
}
function sha1_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; //t<80
}
function sha1_kt(t){
return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
(t < 60) ? -1894007588 : -899497514;
}
function safe_add(x, y){
var lsw = (x & 0xFFFF) + (y & 0xFFFF);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}
function rol(num, cnt){
return (num << cnt) | (num >>> (32 - cnt));
}
function AlignSHA1(str){
var nblk=((str.length+8)>>6)+1, blks=new Array(nblk*16);
for(var i=0;i<nblk*16;i++)blks[i]=0;
for(i=0;i<str.length;i++)
blks[i>>2]|=str.charCodeAt(i)<<(24-(i&3)*8);
blks[i>>2]|=0x80<<(24-(i&3)*8);
blks[nblk*16-1]=str.length*8;
return blks;
}
function binb2hex(binarray){
var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
var str = "";
for(var i = 0; i < binarray.length * 4; i++){
str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) +
hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8 )) & 0xF);
}
return str;
}
function calcDigest(){
var digestM = hex_sha1(document.SHAForm.SourceMessage.value);
document.SHAForm.MessageDigest.value = digestM;
}
</script>
<title>SHA-1算法JavaScript实现</title>
</head>
<body>
<center>
<BR/>
<BR/>
<H2>SHA-1算法JavaScript实现</H2>
<BR/>
<form name="SHAForm"> 源消息:<input type="text" name="SourceMessage" size=40><BR> 消息摘要:<input type="text" name="MessageDigest" size=40> <P> <input type="button" value="计算消息摘要" onclick="calcDigest()"> </form> </body></html>
在补完长度以后是怎么把字符串计算成a,b,c,d,e的,请大侠们指点指点,最好能举例说明,谢谢!
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货