今天发现一个神奇的问题,用户反馈自己账号密码登不了,但是只有他一个人,然后自己区摸排,发现账号和密码输入的都一样就是登录不了,想到了base64的原因,因为我们的密码在进行交互的时候需要加密,于是去查一下base64文件,发现真的有问题,这里记录一下:
首先是错误的base64文件,这里并不是错误,只是有一部分加密时候会漏掉
//加密、解密算法封装：
function Base64()
{
let _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=" ;
this.encode = function(e){
var t="";
var n,r,i,s,o,u,a;
var f=0;
e=_utf8_encode(e);
while(f<e.length){
n=e.charCodeAt(f++);
r=e.charCodeAt(f++);
i=e.charCodeAt(f++);
s=n>>2;
o=(n&3)<<4|r>>4;
u=(r&15)<<2|i>>6;
a=i&63;
if(isNaN(r)){
u=a=64
}else if(isNaN(i)){
a=64
}
t=t+_keyStr.charAt(s)+_keyStr.charAt(o)+_keyStr.charAt(u)+_keyStr.charAt(a)
}
return t
};
this.decode = function(e){
var t="";
var n,r,i;
var s,o,u,a;
var f=0;
e=e.replace(/[^A-Za-z0-9+/=]/g,"");
while(f<e.length){
s=_keyStr.indexOf(e.charAt(f++));
o=_keyStr.indexOf(e.charAt(f++));
u=_keyStr.indexOf(e.charAt(f++));
a=_keyStr.indexOf(e.charAt(f++));
n=s<<2|o>>4;
r=(o&15)<<4|u>>2;
i=(u&3)<<6|a;
t=t+String.fromCharCode(n);
if(u!=64){
t=t+String.fromCharCode(r)
}
if(a!=64){
t=t+String.fromCharCode(i)
}
}
t=_utf8_decode(t);
return t
};
let _utf8_encode = function(e){
e=e.replace(/rn/g,"n");
var t="";
for(var n=0;n<e.length;n++){
var r=e.charCodeAt(n);
if(r<128){
t+=String.fromCharCode(r)
}else if(r>127&&r<2048){
t+=String.fromCharCode(r>>6|192);
t+=String.fromCharCode(r&63|128)
}else{
t+=String.fromCharCode(r>>12|224);
t+=String.fromCharCode(r>>6&63|128);
t+=String.fromCharCode(r&63|128)
}
}
return t
};
let _utf8_decode = function(e){
var t="";
var n=0;
var r=0,c1=0,c2=0;
while(n<e.length){
r=e.charCodeAt(n);
if(r<128){
t+=String.fromCharCode(r);
n++
}else if(r>191&&r<224){
c2=e.charCodeAt(n+1);
t+=String.fromCharCode((r&31)<<6|c2&63);
n+=2
}else{
c2=e.charCodeAt(n+1);
c3=e.charCodeAt(n+2);
t+=String.fromCharCode((r&15)<<12|(c2&63)<<6|c3&63);
n+=3
}
}
return t
}
};
export {
Base64,
}
引用:
上面这种对数字+字母大小写的时候是没有问题的,但是只加密纯小写字母就会出现缺少加密信息的问题.
换成了下面的完美结果:
/*
* base64.js
*
* Licensed under the BSD 3-Clause License.
* http://opensource.org/licenses/BSD-3-Clause
*
* References:
* http://en.wikipedia.org/wiki/Base64
*/
;(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined'
? module.exports = factory(global)
: typeof define === 'function' && define.amd
? define(factory) : factory(global)
}((
typeof self !== 'undefined' ? self
: typeof window !== 'undefined' ? window
: typeof global !== 'undefined' ? global
: this
), function(global) {
'use strict';
// existing version for noConflict()
global = global || {};
var _Base64 = global.Base64;
var version = "2.5.2";
// if node.js and NOT React Native, we use Buffer
var buffer;
if (typeof module !== 'undefined' && module.exports) {
try {
buffer = eval("require('buffer').Buffer");
} catch (err) {
buffer = undefined;
}
}
// constants
var b64chars
= 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
var b64tab = function(bin) {
var t = {};
for (var i = 0, l = bin.length; i < l; i++) t[bin.charAt(i)] = i;
return t;
}(b64chars);
var fromCharCode = String.fromCharCode;
// encoder stuff
var cb_utob = function(c) {
if (c.length < 2) {
var cc = c.charCodeAt(0);
return cc < 0x80 ? c
: cc < 0x800 ? (fromCharCode(0xc0 | (cc >>> 6))
+ fromCharCode(0x80 | (cc & 0x3f)))
: (fromCharCode(0xe0 | ((cc >>> 12) & 0x0f))
+ fromCharCode(0x80 | ((cc >>> 6) & 0x3f))
+ fromCharCode(0x80 | ( cc & 0x3f)));
} else {
var cc = 0x10000
+ (c.charCodeAt(0) - 0xD800) * 0x400
+ (c.charCodeAt(1) - 0xDC00);
return (fromCharCode(0xf0 | ((cc >>> 18) & 0x07))
+ fromCharCode(0x80 | ((cc >>> 12) & 0x3f))
+ fromCharCode(0x80 | ((cc >>> 6) & 0x3f))
+ fromCharCode(0x80 | ( cc & 0x3f)));
}
};
var re_utob = /[\uD800-\uDBFF][\uDC00-\uDFFFF]|[^\x00-\x7F]/g;
var utob = function(u) {
return u.replace(re_utob, cb_utob);
};
var cb_encode = function(ccc) {
var padlen = [0, 2, 1][ccc.length % 3],
ord = ccc.charCodeAt(0) << 16
| ((ccc.length > 1 ? ccc.charCodeAt(1) : 0) << 8)
| ((ccc.length > 2 ? ccc.charCodeAt(2) : 0)),
chars = [
b64chars.charAt( ord >>> 18),
b64chars.charAt((ord >>> 12) & 63),
padlen >= 2 ? '=' : b64chars.charAt((ord >>> 6) & 63),
padlen >= 1 ? '=' : b64chars.charAt(ord & 63)
];
return chars.join('');
};
var btoa = global.btoa ? function(b) {
return global.btoa(b);
} : function(b) {
return b.replace(/[\s\S]{1,3}/g, cb_encode);
};
var _encode = function(u) {
var isUint8Array = Object.prototype.toString.call(u) === '[object Uint8Array]';
return isUint8Array ? u.toString('base64')
: btoa(utob(String(u)));
}
var encode = function(u, urisafe) {
return !urisafe
? _encode(u)
: _encode(String(u)).replace(/[+\/]/g, function(m0) {
return m0 == '+' ? '-' : '_';
}).replace(/=/g, '');
};
var encodeURI = function(u) { return encode(u, true) };
// decoder stuff
var re_btou = /[\xC0-\xDF][\x80-\xBF]|[\xE0-\xEF][\x80-\xBF]{2}|[\xF0-\xF7][\x80-\xBF]{3}/g;
var cb_btou = function(cccc) {
switch(cccc.length) {
case 4:
var cp = ((0x07 & cccc.charCodeAt(0)) << 18)
| ((0x3f & cccc.charCodeAt(1)) << 12)
| ((0x3f & cccc.charCodeAt(2)) << 6)
| (0x3f & cccc.charCodeAt(3)),
offset = cp - 0x10000;
return (fromCharCode((offset >>> 10) + 0xD800)
+ fromCharCode((offset & 0x3FF) + 0xDC00));
case 3:
return fromCharCode(
((0x0f & cccc.charCodeAt(0)) << 12)
| ((0x3f & cccc.charCodeAt(1)) << 6)
| (0x3f & cccc.charCodeAt(2))
);
default:
return fromCharCode(
((0x1f & cccc.charCodeAt(0)) << 6)
| (0x3f & cccc.charCodeAt(1))
);
}
};
var btou = function(b) {
return b.replace(re_btou, cb_btou);
};
var cb_decode = function(cccc) {
var len = cccc.length,
padlen = len % 4,
n = (len > 0 ? b64tab[cccc.charAt(0)] << 18 : 0)
| (len > 1 ? b64tab[cccc.charAt(1)] << 12 : 0)
| (len > 2 ? b64tab[cccc.charAt(2)] << 6 : 0)
| (len > 3 ? b64tab[cccc.charAt(3)] : 0),
chars = [
fromCharCode( n >>> 16),
fromCharCode((n >>> 8) & 0xff),
fromCharCode( n & 0xff)
];
chars.length -= [0, 0, 2, 1][padlen];
return chars.join('');
};
var _atob = global.atob ? function(a) {
return global.atob(a);
} : function(a){
return a.replace(/\S{1,4}/g, cb_decode);
};
var atob = function(a) {
return _atob(String(a).replace(/[^A-Za-z0-9\+\/]/g, ''));
};
var _decode = buffer ?
buffer.from && Uint8Array && buffer.from !== Uint8Array.from
? function(a) {
return (a.constructor === buffer.constructor
? a : buffer.from(a, 'base64')).toString();
}
: function(a) {
return (a.constructor === buffer.constructor
? a : new buffer(a, 'base64')).toString();
}
: function(a) { return btou(_atob(a)) };
var decode = function(a){
return _decode(
String(a).replace(/[-_]/g, function(m0) { return m0 == '-' ? '+' : '/' })
.replace(/[^A-Za-z0-9\+\/]/g, '')
);
};
var noConflict = function() {
var Base64 = global.Base64;
global.Base64 = _Base64;
return Base64;
};
// export Base64
global.Base64 = {
VERSION: version,
atob: atob,
btoa: btoa,
fromBase64: decode,
toBase64: encode,
utob: utob,
encode: encode,
encodeURI: encodeURI,
btou: btou,
decode: decode,
noConflict: noConflict,
__buffer__: buffer
};
// if ES5 is available, make Base64.extendString() available
if (typeof Object.defineProperty === 'function') {
var noEnum = function(v){
return {value:v,enumerable:false,writable:true,configurable:true};
};
global.Base64.extendString = function () {
Object.defineProperty(
String.prototype, 'fromBase64', noEnum(function () {
return decode(this)
}));
Object.defineProperty(
String.prototype, 'toBase64', noEnum(function (urisafe) {
return encode(this, urisafe)
}));
Object.defineProperty(
String.prototype, 'toBase64URI', noEnum(function () {
return encode(this, true)
}));
};
}
//
// export Base64 to the namespace
//
if (global['Meteor']) { // Meteor.js
Base64 = global.Base64;
}
// module.exports and AMD are mutually exclusive.
// module.exports has precedence.
if (typeof module !== 'undefined' && module.exports) {
module.exports.Base64 = global.Base64;
}
else if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define([], function(){ return global.Base64 });
}
// that's it!
return {Base64: global.Base64}
}));
引用:
到此完美解决.
标签：function,global,return,base64,Base64,解密,var,加密,fromCharCode From： https://www.cnblogs.com/wgs-blog/p/16903284.html