本文实例讲述了JavaScript实现的SHA-1加密算法。分享给大家供大家参考，具体如下：
>>(32-s));
return t4;
};
function lsb_hex(val) {
var str="";
var i;
var vh;
var vl;
for( i=0; i<=6; i+=2 ) {
vh = (val>>>(i*4+4))&0x0f;
vl = (val>>>(i*4))&0x0f;
str += vh.toString(16) + vl.toString(16);
}
return str;
};
function cvt_hex(val) {
var str="";
var i;
var v;
for( i=7; i>=0; i-- ) {
v = (val>>>(i*4))&0x0f;
str += v.toString(16);
}
return str;
};
function Utf8Encode(string) {
string = string.replace(/\r\n/g,"\n");
var utftext = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
}
else if((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
}
else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
};
var blockstart;
var i,j;
var W = new Array(80);
var H0 = 0x67452301;
var H1 = 0xEFCDAB89;
var H2 = 0x98BADCFE;
var H3 = 0x10325476;
var H4 = 0xC3D2E1F0;
var A,B,C,D,E;
var temp;
msg = Utf8Encode(msg);
var msg_len = msg.length;
var word_array = new Array();
for( i=0; i>>29 );
word_array.push( (msg_len<<3)&0x0ffffffff );
for ( blockstart=0; blockstart
更多关于JavaScript相关内容感兴趣的读者可查看本站专题：《》及《》
希望本文所述对大家JavaScript程序设计有所帮助。
原文链接：https://www.f2er.com/js/50235.html