本文实例讲述了JS常用加密编码与算法。分享给大家供大家参考，具体如下：
一：UTF8编码函数
=0x30&&icode<=0x39)||(icode>=0x41&&icode<=0x5A)||(icode>=0x61&&icode<=0x7A))
newStr+=Str.charAt(i);
else
newStr+="%"+toCase(icode);
}
else if(icode<0x800){
newStr+="%"+toCase(0xC0+(icode>>6));
newStr+="%"+toCase(0x80+icode%0x40);
}
else{
newStr+="%"+toCase(0xE0+(icode>>12));
newStr+="%"+toCase(0x80+(icode>>6)%0x40);
newStr+="%"+toCase(0x80+icode%0x40);
}
}
return newStr;
}
二：Base64编码,解码函数
> 2);
out += base64EncodeChars.charAt((c1 & 0x3) << 4);
out += "==";
break;
}
c2 = str.charCodeAt(i++);
if(i == len)
{
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charAt((c2 & 0xF) << 2);
out += "=";
break;
}
c3 = str.charCodeAt(i++);
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));
out += base64EncodeChars.charAt(c3 & 0x3F);
}
return out;
}
function base64decode(str) {
var c1,c3,c4;
var i,len,out;
len = str.length;
i = 0;
out = "";
while(i < len) {
/* c1 */
do {
c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
} while(i < len && c1 == -1);
if(c1 == -1)
break;
/* c2 */
do {
c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
} while(i < len && c2 == -1);
if(c2 == -1)
break;
out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
/* c3 */
do {
c3 = str.charCodeAt(i++) & 0xff;
if(c3 == 61)
return out;
c3 = base64DecodeChars[c3];
} while(i < len && c3 == -1);
if(c3 == -1)
break;
out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
/* c4 */
do {
c4 = str.charCodeAt(i++) & 0xff;
if(c4 == 61)
return out;
c4 = base64DecodeChars[c4];
} while(i < len && c4 == -1);
if(c4 == -1)
break;
out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
}
return out;
}
function utf16to8(str) {
var out,c;
out = "";
len = str.length;
for(i = 0; i < len; i++) {
c = str.charCodeAt(i);
if ((c >= 0x0001) && (c <= 0x007F)) {
out += str.charAt(i);
} else if (c > 0x07FF) {
out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
} else {
out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
}
}
return out;
}
function utf8to16(str) {
var out,c;
var char2,char3;
out = "";
len = str.length;
i = 0;
while(i < len) {
c = str.charCodeAt(i++);
switch(c >> 4)
{
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
// 0xxxxxxx
out += str.charAt(i-1);
break;
case 12: case 13:
// 110x xxxx 10xx xxxx
char2 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
break;
case 14:
// 1110 xxxx 10xx xxxx 10xx xxxx
char2 = str.charCodeAt(i++);
char3 = str.charCodeAt(i++);
out += String.fromCharCode(((c & 0x0F) << 12) |
((char2 & 0x3F) << 6) |
((char3 & 0x3F) << 0));
break;
}
}
return out;
}
function doit() {
var f = document.f
f.output.value = base64encode(utf16to8(f.source.value))
f.decode.value = utf8to16(base64decode(f.output.value))
}
三：MD5
> 5] |= 0x80 << ((len) % 32);
x[(((len + 64) >>> 9) << 4) + 14] = len;
var a = 1732584193;
var b = -271733879;
var c = -1732584194;
var d = 271733878;
for(var i = 0; i < x.length; i += 16)
{
var olda = a;
var oldb = b;
var oldc = c;
var oldd = d;
a = md5_ff(a,b,c,d,x[i+ 0],-680876936);
d = md5_ff(d,a,x[i+ 1],-389564586);
c = md5_ff(c,x[i+ 2],606105819);
b = md5_ff(b,x[i+ 3],-1044525330);
a = md5_ff(a,x[i+ 4],-176418897);
d = md5_ff(d,x[i+ 5],1200080426);
c = md5_ff(c,x[i+ 6],-1473231341);
b = md5_ff(b,x[i+ 7],-45705983);
a = md5_ff(a,x[i+ 8],1770035416);
d = md5_ff(d,x[i+ 9],-1958414417);
c = md5_ff(c,x[i+10],-42063);
b = md5_ff(b,x[i+11],-1990404162);
a = md5_ff(a,x[i+12],1804603682);
d = md5_ff(d,x[i+13],-40341101);
c = md5_ff(c,x[i+14],-1502002290);
b = md5_ff(b,x[i+15],1236535329);
a = md5_gg(a,-165796510);
d = md5_gg(d,-1069501632);
c = md5_gg(c,643717713);
b = md5_gg(b,-373897302);
a = md5_gg(a,-701558691);
d = md5_gg(d,38016083);
c = md5_gg(c,-660478335);
b = md5_gg(b,-405537848);
a = md5_gg(a,568446438);
d = md5_gg(d,-1019803690);
c = md5_gg(c,-187363961);
b = md5_gg(b,1163531501);
a = md5_gg(a,-1444681467);
d = md5_gg(d,-51403784);
c = md5_gg(c,1735328473);
b = md5_gg(b,-1926607734);
a = md5_hh(a,-378558);
d = md5_hh(d,-2022574463);
c = md5_hh(c,1839030562);
b = md5_hh(b,-35309556);
a = md5_hh(a,-1530992060);
d = md5_hh(d,1272893353);
c = md5_hh(c,-155497632);
b = md5_hh(b,-1094730640);
a = md5_hh(a,681279174);
d = md5_hh(d,-358537222);
c = md5_hh(c,-722521979);
b = md5_hh(b,76029189);
a = md5_hh(a,-640364487);
d = md5_hh(d,-421815835);
c = md5_hh(c,530742520);
b = md5_hh(b,-995338651);
a = md5_ii(a,-198630844);
d = md5_ii(d,1126891415);
c = md5_ii(c,-1416354905);
b = md5_ii(b,-57434055);
a = md5_ii(a,1700485571);
d = md5_ii(d,-1894986606);
c = md5_ii(c,-1051523);
b = md5_ii(b,-2054922799);
a = md5_ii(a,1873313359);
d = md5_ii(d,-30611744);
c = md5_ii(c,-1560198380);
b = md5_ii(b,1309151649);
a = md5_ii(a,-145523070);
d = md5_ii(d,-1120210379);
c = md5_ii(c,718787259);
b = md5_ii(b,-343485551);
a = safe_add(a,olda);
b = safe_add(b,oldb);
c = safe_add(c,oldc);
d = safe_add(d,oldd);
}
return Array(a,d);
}
/*
* These functions implement the four basic operations the algorithm uses.
*/
function md5_cmn(q,x,s,t)
{
return safe_add(bit_rol(safe_add(safe_add(a,q),safe_add(x,t)),s),b);
}
function md5_ff(a,t)
{
return md5_cmn((b & c) | ((~b) & d),t);
}
function md5_gg(a,t)
{
return md5_cmn((b & d) | (c & (~d)),t);
}
function md5_hh(a,t)
{
return md5_cmn(b ^ c ^ d,t);
}
function md5_ii(a,t)
{
return md5_cmn(c ^ (b | (~d)),t);
}
/*
* Calculate the HMAC-MD5,of a key and some data
*/
function core_hmac_md5(key,data)
{
var bkey = str2binl(key);
if(bkey.length > 16) bkey = core_md5(bkey,key.length * chrsz);
var ipad = Array(16),opad = Array(16);
for(var i = 0; i < 16; i++)
{
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5C5C5C5C;
}
var hash = core_md5(ipad.concat(str2binl(data)),512 + data.length * chrsz);
return core_md5(opad.concat(hash),512 + 128);
}
/*
* Add integers,wrapping at 2^32. This uses 16-bit operations internally
* to work around bugs in some JS interpreters.
*/
function safe_add(x,y)
{
var lsw = (x & 0xFFFF) + (y & 0xFFFF);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}
/*
* Bitwise rotate a 32-bit number to the left.
*/
function bit_rol(num,cnt)
{
return (num << cnt) | (num >>> (32 - cnt));
}
/*
* Convert a string to an array of little-endian words
* If chrsz is ASCII,characters >255 have their hi-byte silently ignored.
*/
function str2binl(str)
{
var bin = Array();
var mask = (1 << chrsz) - 1;
for(var i = 0; i < str.length * chrsz; i += chrsz)
bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
return bin;
}
/*
* Convert an array of little-endian words to a string
*/
function binl2str(bin)
{
var str = "";
var mask = (1 << chrsz) - 1;
for(var i = 0; i < bin.length * 32; i += chrsz)
str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
return str;
}
/*
* Convert an array of little-endian words to a hex string.
*/
function binl2hex(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] >> ((i%4)*8+4)) & 0xF) +
hex_tab.charAt((binarray[i>>2] >> ((i%4)*8 )) & 0xF);
}
return str;
}
/*
* Convert an array of little-endian words to a base-64 string
*/
function binl2b64(binarray)
{
var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var str = "";
for(var i = 0; i < binarray.length * 4; i += 3)
{
var triplet = (((binarray[i >> 2] >> 8 * ( i %4)) & 0xFF) << 16)
| (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
| ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
for(var j = 0; j < 4; j++)
{
if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
}
}
return str;
}
MD4算法
> 5] |= 0x80 << (len % 32);
x[(((len + 64) >>> 9) << 4) + 14] = len;
var a = 1732584193;
var b = -271733879;
var c = -1732584194;
var d = 271733878;
for(var i = 0; i < x.length; i += 16)
{
var olda = a;
var oldb = b;
var oldc = c;
var oldd = d;
a = md4_ff(a,3 );
d = md4_ff(d,7 );
c = md4_ff(c,11);
b = md4_ff(b,19);
a = md4_ff(a,19);
a = md4_gg(a,3 );
d = md4_gg(d,5 );
c = md4_gg(c,9 );
b = md4_gg(b,13);
a = md4_gg(a,13);
a = md4_hh(a,3 );
d = md4_hh(d,9 );
c = md4_hh(c,11);
b = md4_hh(b,15);
a = md4_hh(a,15);
a = safe_add(a,d);
}
/*
* These functions implement the basic operation for each round of the
* algorithm.
*/
function md4_cmn(q,t)
{
return safe_add(rol(safe_add(safe_add(a,b);
}
function md4_ff(a,s)
{
return md4_cmn((b & c) | ((~b) & d),0);
}
function md4_gg(a,s)
{
return md4_cmn((b & c) | (b & d) | (c & d),1518500249);
}
function md4_hh(a,s)
{
return md4_cmn(b ^ c ^ d,1859775393);
}
/*
* Calculate the HMAC-MD4,of a key and some data
*/
function core_hmac_md4(key,data)
{
var bkey = str2binl(key);
if(bkey.length > 16) bkey = core_md4(bkey,opad = Array(16);
for(var i = 0; i < 16; i++)
{
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5C5C5C5C;
}
var hash = core_md4(ipad.concat(str2binl(data)),512 + data.length * chrsz);
return core_md4(opad.concat(hash),y)
{
var lsw = (x & 0xFFFF) + (y & 0xFFFF);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}
/*
* Bitwise rotate a 32-bit number to the left.
*/
function rol(num,characters >255 have their hi-byte silently ignored.
*/
function str2binl(str)
{
var bin = Array();
var mask = (1 << chrsz) - 1;
for(var i = 0; i < str.length * chrsz; i += chrsz)
bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
return bin;
}
/*
* Convert an array of little-endian words to a string
*/
function binl2str(bin)
{
var str = "";
var mask = (1 << chrsz) - 1;
for(var i = 0; i < bin.length * 32; i += chrsz)
str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
return str;
}
/*
* Convert an array of little-endian words to a hex string.
*/
function binl2hex(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] >> ((i%4)*8+4)) & 0xF) +
hex_tab.charAt((binarray[i>>2] >> ((i%4)*8 )) & 0xF);
}
return str;
}
/*
* Convert an array of little-endian words to a base-64 string
*/
function binl2b64(binarray)
{
var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var str = "";
for(var i = 0; i < binarray.length * 4; i += 3)
{
var triplet = (((binarray[i >> 2] >> 8 * ( i %4)) & 0xFF) << 16)
| (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
| ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
for(var j = 0; j < 4; j++)
{
if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
}
}
return str;
}
SHA1算法
> 5] |= 0x80 << (24 - len % 32);
x[((len + 64 >> 9) << 4) + 15] = len;
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,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,oldd);
e = safe_add(e,olde);
}
return Array(a,e);
}
/*
* Perform the appropriate triplet combination function for the current
* iteration
*/
function sha1_ft(t,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;
}
/*
* Determine the appropriate additive constant for the current iteration
*/
function sha1_kt(t)
{
return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
(t < 60) ? -1894007588 : -899497514;
}
/*
* Calculate the HMAC-SHA1 of a key and some data
*/
function core_hmac_sha1(key,data)
{
var bkey = str2binb(key);
if(bkey.length > 16) bkey = core_sha1(bkey,opad = Array(16);
for(var i = 0; i < 16; i++)
{
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5C5C5C5C;
}
var hash = core_sha1(ipad.concat(str2binb(data)),512 + data.length * chrsz);
return core_sha1(opad.concat(hash),512 + 160);
}
/*
* Add integers,cnt)
{
return (num << cnt) | (num >>> (32 - cnt));
}
/*
* Convert an 8-bit or 16-bit string to an array of big-endian words
* In 8-bit function,characters >255 have their hi-byte silently ignored.
*/
function str2binb(str)
{
var bin = Array();
var mask = (1 << chrsz) - 1;
for(var i = 0; i < str.length * chrsz; i += chrsz)
bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (32 - chrsz - i%32);
return bin;
}
/*
* Convert an array of big-endian words to a string
*/
function binb2str(bin)
{
var str = "";
var mask = (1 << chrsz) - 1;
for(var i = 0; i < bin.length * 32; i += chrsz)
str += String.fromCharCode((bin[i>>5] >>> (32 - chrsz - i%32)) & mask);
return str;
}
/*
* Convert an array of big-endian words to a hex string.
*/
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;
}
/*
* Convert an array of big-endian words to a base-64 string
*/
function binb2b64(binarray)
{
var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var str = "";
for(var i = 0; i < binarray.length * 4; i += 3)
{
var triplet = (((binarray[i >> 2] >> 8 * (3 - i %4)) & 0xFF) << 16)
| (((binarray[i+1 >> 2] >> 8 * (3 - (i+1)%4)) & 0xFF) << 8 )
| ((binarray[i+2 >> 2] >> 8 * (3 - (i+2)%4)) & 0xFF);
for(var j = 0; j < 4; j++)
{
if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
}
}
return str;
}
BASE64编码解码工具：
URL网址16进制加密工具：
密码安全性在线检测：
高强度密码生成器：
http://tools.jb51.cc/password/Createh3PasswordMD5在线加密工具：
http://tools.jb51.cc/password/CreateMD5Password迅雷、快车、旋风URL加密/解密工具：
http://tools.jb51.cc/password/urlrethunder在线散列/哈希算法加密工具：
http://tools.jb51.cc/password/hash_encrypt更多关于JavaScript相关内容可查看本站专题：《》、《》、《》、《》、《》、《》、《》及《》
希望本文所述对大家JavaScript程序设计有所帮助。
