在网上搜索jquery base64解密
说的比较多的是用jquery.base64.js
搜出来的某**DN需要积分，找了半天才发现在github上有源码
于是分享一下源代码和用法
一、用法
页面得引入jqurey
还有：<script src="./jquery.base64.js"></script>
具体用法，后台返回了JSON格式的对象，里面存了jwt
解密jwt的中间部分，拿出相印的信息
var json = jQuery.parseJSON(data);
var jwt = json.jwt;
var kv = $.base64.decode(jwt.split('.')[1]);
var info = jQuery.parseJSON(kv);
二、插件源代码
jquery.base64.js
/**
* Created by Administrator on 2018/3/17.
*/
(function($){
var base64module = {};
// *** begin
/* /_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
charset = shift_jis
+++ Base64 Encode / Decode +++
LastModified : 2006-11/08
Powered by kerry
http://202.248.69.143/~goma/
動作ブラウザ :: IE4+ , NN4.06+ , Gecko , Opera6+
* [RFC 2045] Multipurpose Internet Mail Extensions
(MIME) Part One:
Format of Internet Message Bodies
ftp://ftp.isi.edu/in-notes/rfc2045.txt
/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
* Usage:
// エンコード
b64_string = base64.encode( my_data [, strMode] );
// デコード
my_data = base64.decode( b64_string [, strMode] );
strMode -> 入力データが文字列の場合 1 を
/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ */
// [yatt] enclose
//base64 = new function()
var base64 = new function()
//
{
var utfLibName = "utf";
var b64char = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var b64encTable = b64char.split("");
var b64decTable = [];
for (var i=0; i<b64char.length; i++) b64decTable[b64char.charAt(i)] = i;
this.encode = function(_dat, _strMode)
{
return encoder( _strMode? unpackUTF8(_dat): unpackChar(_dat) );
}
var encoder = function(_ary)
{
var md = _ary.length % 3;
var b64 = "";
var i, tmp = 0;
if (md) for (i=3-md; i>0; i--) _ary[_ary.length] = 0;
for (i=0; i<_ary.length; i+=3)
{
tmp = (_ary[i]<<16) | (_ary[i+1]<<8) | _ary[i+2];
b64 += b64encTable[ (tmp >>>18) & 0x3f]
+ b64encTable[ (tmp >>>12) & 0x3f]
+ b64encTable[ (tmp >>> 6) & 0x3f]
+ b64encTable[ tmp & 0x3f];
}
if (md) // 3の倍数にパディングした 0x0 分 = に置き換え
{
md = 3- md;
b64 = b64.substr(0, b64.length- md);
while (md--) b64 += "=";
}
return b64;
}
this.decode = function(_b64, _strMode)
{
var tmp = decoder( _b64 );
return _strMode? packUTF8(tmp): packChar(tmp);
}
var decoder = function(_b64)
{
_b64 = _b64.replace(/[^A-Za-z0-9\+\/]/g, "");
var md = _b64.length % 4;
var j, i, tmp;
var dat = [];
// replace 時 = も削っている。その = の代わりに 0x0 を補間
if (md) for (i=0; i<4-md; i++) _b64 += "A";
for (j=i=0; i<_b64.length; i+=4, j+=3)
{
tmp = (b64decTable[_b64.charAt( i )] <<18)
| (b64decTable[_b64.charAt(i+1)] <<12)
| (b64decTable[_b64.charAt(i+2)] << 6)
| b64decTable[_b64.charAt(i+3)];
dat[ j ] = tmp >>> 16;
dat[j+1] = (tmp >>> 8) & 0xff;
dat[j+2] = tmp & 0xff;
}
// 補完された 0x0 分削る
if (md) dat.length -= [0,0,2,1][md];
return dat;
}
var packUTF8 = function(_x){ return utf.packUTF8(_x) };
var unpackUTF8 = function(_x){ return utf.unpackUTF8(_x) };
var packChar = function(_x){ return utf.packChar(_x) };
var unpackChar = function(_x){ return utf.unpackChar(_x) };
// var packUTF8 = function(_x){ return window[utfLibName].packUTF8(_x) };
// var unpackUTF8 = function(_x){ return window[utfLibName].unpackUTF8(_x) };
// var packChar = function(_x){ return window[utfLibName].packChar(_x) };
// var unpackChar = function(_x){ return window[utfLibName].unpackChar(_x) };
}
/* /_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
charset = shift_jis
+++ UTF8/16 ライブラリ +++
LastModified : 2006-10/16
Powered by kerry
http://202.248.69.143/~goma/
動作ブラウザ :: IE4+ , NN4.06+ , Gecko , Opera6+
* [RFC 2279] UTF-8, a transformation format of ISO 10646
ftp://ftp.isi.edu/in-notes/rfc2279.txt
* [RFC 1738] Uniform Resource Locators (URL)
ftp://ftp.isi.edu/in-notes/rfc1738.txt
/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
Usage:
// 文字列を UTF16 (文字コード) へ
utf16code_array = utf.unpackUTF16( my_string );
// 文字列を UTF8 (文字コード) へ
utf8code_array = utf.unpackUTF8( my_string );
// UTF8 (文字コード) から文字列へ。 utf.unpackUTF8() したものを元に戻す
my_string = utf.packUTF8( utf8code_array );
// UTF8/16 (文字コード) を文字列へ
my_string = utf.packChar( utfCode_array );
// UTF16 (文字コード) から UTF8 (文字コード) へ
utf8code_array = utf.toUTF8( utf16code_array );
// UTF8 (文字コード) から UTF16 (文字コード) へ
utf16code_array = utf.toUTF16( utf8code_array );
// URL 文字列へエンコード
url_string = utf.URLencode( my_string );
// URL 文字列からデコード
my_string = utf.URLdecode( url_string );
/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ */
// [yatt] enclose
//utf = new function()
var utf = new function()
//
{
this.unpackUTF16 = function(_str)
{
var i, utf16=[];
for (i=0; i<_str.length; i++) utf16[i] = _str.charCodeAt(i);
return utf16;
}
this.unpackChar = function(_str)
{
var utf16 = this.unpackUTF16(_str);
var i,n, tmp = [];
for (n=i=0; i<utf16.length; i++) {
if (utf16[i]<=0xff) tmp[n++] = utf16[i];
else {
tmp[n++] = utf16[i] >> 8;
tmp[n++] = utf16[i] & 0xff;
}
}
return tmp;
}
this.packChar =
this.packUTF16 = function(_utf16)
{
var i, str = "";
for (i in _utf16) str += String.fromCharCode(_utf16[i]);
return str;
}
this.unpackUTF8 = function(_str)
{
return this.toUTF8( this.unpackUTF16(_str) );
}
this.packUTF8 = function(_utf8)
{
return this.packUTF16( this.toUTF16(_utf8) );
}
this.toUTF8 = function(_utf16)
{
var utf8 = [];
var idx = 0;
var i, j, c;
for (i=0; i<_utf16.length; i++)
{
c = _utf16[i];
if (c <= 0x7f) utf8[idx++] = c;
else if (c <= 0x7ff)
{
utf8[idx++] = 0xc0 | (c >>> 6 );
utf8[idx++] = 0x80 | (c & 0x3f);
}
else if (c <= 0xffff)
{
utf8[idx++] = 0xe0 | (c >>> 12 );
utf8[idx++] = 0x80 | ((c >>> 6 ) & 0x3f);
utf8[idx++] = 0x80 | (c & 0x3f);
}
else
{
j = 4;
while (c >> (6*j)) j++;
utf8[idx++] = ((0xff00 >>> j) & 0xff) | (c >>> (6*--j) );
while (j--)
utf8[idx++] = 0x80 | ((c >>> (6*j)) & 0x3f);
}
}
return utf8;
}
this.toUTF16 = function(_utf8)
{
var utf16 = [];
var idx = 0;
var i,s;
for (i=0; i<_utf8.length; i++, idx++)
{
if (_utf8[i] <= 0x7f) utf16[idx] = _utf8[i];
else
{
if ( (_utf8[i]>>5) == 0x6)
{
utf16[idx] = ( (_utf8[i] & 0x1f) << 6 )
| ( _utf8[++i] & 0x3f );
}
else if ( (_utf8[i]>>4) == 0xe)
{
utf16[idx] = ( (_utf8[i] & 0xf) << 12 )
| ( (_utf8[++i] & 0x3f) << 6 )
| ( _utf8[++i] & 0x3f );
}
else
{
s = 1;
while (_utf8[i] & (0x20 >>> s) ) s++;
utf16[idx] = _utf8[i] & (0x1f >>> s);
while (s-->=0) utf16[idx] = (utf16[idx] << 6) ^ (_utf8[++i] & 0x3f);
}
}
}
return utf16;
}
this.URLencode = function(_str)
{
return _str.replace(/([^a-zA-Z0-9_\-\.])/g, function(_tmp, _c)
{
if (_c == "\x20") return "+";
var tmp = utf.toUTF8( [_c.charCodeAt(0)] );
var c = "";
for (var i in tmp)
{
i = tmp[i].toString(16);
if (i.length == 1) i = "0"+ i;
c += "%"+ i;
}
return c;
} );
}
this.URLdecode = function(_dat)
{
_dat = _dat.replace(/\+/g, "\x20");
_dat = _dat.replace( /%([a-fA-F0-9][a-fA-F0-9])/g,
function(_tmp, _hex){ return String.fromCharCode( parseInt(_hex, 16) ) } );
return this.packChar( this.toUTF16( this.unpackUTF16(_dat) ) );
}
}
// *** end
// add functions
$.extend({
base64: {
encode: base64.encode,
decode: base64.decode,
codec: typeof atob == 'function' ? 'builtin' : 'alternate'
}
})
//
// override jQuery.ajax:
// if ajax 'dataType' option value ended by ':b64', then
// decode base64 string automatically
//
$.ajax = (function(ajax){
return function(option){
var flg = 0
// dataType string ended by ':b64' or not?
if (option.dataType && option.dataType.match(/:b64/)){
option.dataType = option.dataType.replace(':b64', '')
flg = 1
}
if (flg){
option.success = (function(callback){
return function(data, status, xhr){
data = $.base64.decode(data)
callback(data, status, xhr)
}
})(option.success || function(data, status, xhr){})
}
return ajax.apply(this, arguments)
}
})($.ajax)
})(jQuery)
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