Base64加密解密

我不是女神ヾ 2024-03-24 06:35 57阅读 0赞

## 一、Base64加密解密 ##

### 一、前端加密 ###

#### 一、方法 一 ####

const that = this;
    const copyruleForm = JSON.parse(JSON.stringify(that.ruleForm));
    const c_clus_content = window.btoa(unescape(encodeURIComponent(this.ruleForm.c_clus_content)));
    const c_clus_econtent = window.btoa(unescape(encodeURIComponent(this.ruleForm.c_clus_econtent)))
    
    注：unescape()方法已经被弃用，不建议使用

#### 二、方法 二 ####

注：深拷贝处理

const that = this;
    # 深拷贝
    const copyruleForm = JSON.parse(JSON.stringify(that.ruleForm));
    const c_clus_content = btoa(encodeURI(that.ruleForm.c_clus_content));
    const c_clus_econtent = btoa(encodeURI(that.ruleForm.c_clus_econtent));

### 二、后端解密 ###

#### 一、方法 一 ####

public ProdCompDuty update(ProdCompDutyDTO prodCompDutyDTO) {
        
            ProdCompDuty field = prodCompDutyDTO.getField();
            //Base64解密 责任中文内容和责任英文内容
            if (StringUtil.isNotBlank(prodCompDutyDTO.getIsBase64()) && "true".equals(prodCompDutyDTO.getIsBase64())) {
        
                byte[] bytes1 = Base64.getDecoder().decode(field.getC_clus_content());
                String c_clus_content = new String(bytes1);
                field.setC_clus_content(c_clus_content);
                byte[] bytes2 = Base64.getDecoder().decode(field.getC_clus_econtent());
                String c_clus_econtent = new String(bytes2);
                field.setC_clus_econtent(c_clus_econtent);
            }
                ProdCompDutyDao.updateOne_odb_duty_no(field);
                return field;
        }

#### 二、方法 二 ####

public ProdCompDuty update(ProdCompDutyDTO prodCompDutyDTO) {
        
             ProdCompDuty field = prodCompDutyDTO.getField();
            //Base64解密 责任中文内容和责任英文内容
            if (StringUtil.isNotBlank(prodCompDutyDTO.getIsBase64()) && "true".equals(prodCompDutyDTO.getIsBase64())) {
        
                try {
        
                    String c_clus_content = URLDecoder.decode(new String(Base64.getDecoder().decode(field.getC_clus_content()), "utf-8"), "utf-8");
                    String c_clus_econtent = URLDecoder.decode(new String(Base64.getDecoder().decode(field.getC_clus_econtent()), "utf-8"), "utf-8");
                    field.setC_clus_content(c_clus_content);
                    field.setC_clus_econtent(c_clus_econtent);
                } catch (UnsupportedEncodingException e) {
        
                    e.printStackTrace();
                }
            }
            ProdCompDutyDao.updateOne_odb_duty_no(field);
            return field;
        }

### 三、前端加密解密 ###

#### 一、window浏览器环境 ####

1、window.btoa() 将ascii字符串或二进制数据转换成 base64 编码过的字符串

2、window.atob() 函数用来解码被 base64 编码过的数据

# 方法名就是 btoa和 atob ，具体语法如下：
    window.btoa('hellow World')  // 编码   aGVsbG93IFdvcmxk
    window.atob('aGVsbG93IFdvcmxk')  // 解码 hellow World

注意：不适用于带中文解密，即window.btoa 与 window.atob 不支持中文，且 IE9 以下不支持atob、btoa

解决：btoa 不支持 Unicode 字符编码的问题编码时，先用 encodeURIComponent 对字符串进行编码，再进行 btoa 进行 Base64 编码解码时，先用 atob 对 Base64 编码的串进行解码，再用 decodeURIComponent 对字符串进行解码

var str = "hello,中国";
    var encoded_str = btoa(encodeURIComponent(str));
    var decoded_str = decodeURIComponent(atob(encoded_str));
    
    console.log(encoded_str); // aGVsbG8lMkMlRTQlQjglQUQlRTUlOUIlQkQ=
    console.log(decoded_str); // hello,中国在这里插入代码片

#### 二、封装base64 ####

/*
     *  base64.js
     */
    ;(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}
    }));

方法使用

1、引用
    import {
        Base64} from './utils/base64'
    2、使用
    Base64.encode('hellow world'); // 编码  aGVsbG93IFdvcmxk
    Base64.decode('aGVsbG93IFdvcmxk'); // 解码  hellow World

#### 三、开源的base64.js ####

1、下载依赖
    $ npm install --save js-base64
    
    2、使用方法：
    import {
        Base64} from 'js-base64'
    
    Base64.encode('hellow world'); // 编码  aGVsbG93IFdvcmxk
    Base64.decode('aGVsbG93IFdvcmxk'); // 解码  hellow World

### 四、后端Base64工具类 ###

#### 一、base64加密解密（apache） ####

import org.apache.commons.net.util.Base64;
    
    import java.io.UnsupportedEncodingException;
    
    @SuppressWarnings("restriction")
    public class BaseEncodeAndDecode {
          
    	//加密  
        public static String getBase64(String str){
          
            byte[] b=null;  
            String s=null;  
            try {
          
                b = str.getBytes("utf-8");  
            } catch (UnsupportedEncodingException e) {
          
                e.printStackTrace();  
            }  
            if(b!=null){
          
                s=Base64.encodeBase64String(b);
            }
            return s;  
        }  
        // 解密    
        public static String getFromBase64(String s) {
            
            byte[] b = null;    
            String result = null;    
            if (s != null) {
            
                try {
        
                    b = Base64.decodeBase64(s);
                    result = new String(b, "utf-8");    
                } catch (Exception e) {
            
                    e.printStackTrace();    
                }    
            }    
            return result;    
        } 
    }

#### 二、base64加密解密（util） ####

import java.util.Base64;
    
    public class BaseEncodeAndDecode {
          
    	//加密
    	private static String BaseEncodeAndDecode(String str) {
        
    		//String encodedString = Base64.getEncoder().encodeToString(str.getBytes());
    		String encodedString = Base64.getEncoder().withoutPadding().encodeToString(str.getBytes());
    		return encodedString;
    	}
    
    	//解密
    	private static String getFromBase64(String str) {
        
    		byte[] decodedBytes = Base64.getDecoder().decode(str);
    		String decodedString = new String(decodedBytes);
    		return decodedString;
    	}
    }