AS3加密解密Des

来源：互联网发布：知乎评价章泽天长相编辑：程序博客网时间：2024/06/05 07:01
1、导入D:\workspace\newTesthehe\src\com\hurlant，即com.hurlant包，下载的在F:\程序文件里面
2、执行加密解密就是下面的代码
使用as3加解密的开源项目as3crypto，下载地址：
http://download.csdn.net/detail/lang10217/7519497
官方下载地址：
http://code.google.com/p/as3crypto/
示例代码：
[javascript] view plain copy 
package  
{  
    import com.hurlant.crypto.symmetric.DESKey;  
    import com.hurlant.crypto.symmetric.ECBMode;  
    import com.hurlant.util.Base64;  
      
    import flash.display.Sprite;  
    import flash.utils.ByteArray;  
      
    /** 
     * Author:大飞狼 
     * Date: 2014-6-19 上午9:30:12 
     * Synopsis:des加解密测试 
     */  
    public class DesTest extends Sprite  
    {  
        /** 
         * key顾名思义就是加解密用的钥匙 
         */       
        private const KEY_STR:String="123123";  
          
        public function DesTest()  
        {  
            var b_ba:ByteArray=encrypt(KEY_STR,"www.dafeilang.com");  
            //字符串形式的密文  
            var b_ciphertext:String=Base64.encodeByteArray(b_ba);  
            trace("密文:",b_ciphertext);  
              
            var b_ciphertext16:String=byteArrayTo16(b_ba);  
            trace("十六进制形式密文:",b_ciphertext16);  
              
            //解密后的原文  
            var b_originalText :String=decrypt(KEY_STR,Base64.decodeToByteArray(b_ciphertext));  
            trace("解密得到：",b_originalText);  
              
            //解密16进制密文后的原文  
            var b_originalText16 :String=decrypt(KEY_STR,from16ToByteArray(b_ciphertext16));  
            trace("解密十六进制密文得到：",b_originalText16);  
        }  
        /** 
         * 加密 
         * @param key 加解密用的key 
         * @param data 被加密的字符串 
         * @return 加密后生成ByteArray数据 
         */       
        private function encrypt(key:String,data:String):ByteArray{  
            trace("执行加密方法，key:",key,"，被加密的字符串：",data);  
              
            //实验化key的Bytearray对象，给DESKey使用  
            var b_keyByteArray:ByteArray=new ByteArray();   
            b_keyByteArray.writeUTFBytes(key);  
              
            //实例化DESKey  
            var b_desKey:DESKey=new DESKey(b_keyByteArray);  
              
            //不只是有ecb还有cbc,cfb等，有兴趣可以自己尝试  
            var b_ecb:ECBMode=new ECBMode(b_desKey);  
            //把需要加密字符串转换为ByteArray  
            var b_byteArray:ByteArray=convertStringToByteArray(data);  
              
            //执行加密  
            b_ecb.encrypt(b_byteArray);  
              
            return b_byteArray;  
        }  
        /** 
         * 解密 
         * @param key 解密用的key 
         * @param data 需要解密的数据 
         * @return 解密后的数据 
         */       
        private function decrypt(key:String,data:ByteArray):String{  
            trace("\n执行解密方法，key:",key,"，需要解密的字符串：",data);  
              
            //实验化key的Bytearray对象，给DESKey使用  
            var b_keyByteArray:ByteArray=new ByteArray();   
            b_keyByteArray.writeUTFBytes(key);  
              
            //实例化DESKey  
            var b_desKey:DESKey=new DESKey(b_keyByteArray);  
              
            //  
            var b_ecb:ECBMode=new ECBMode(b_desKey);  
              
            var b_byteArray:ByteArray=new ByteArray();  
            b_byteArray.writeBytes(data);  
              
            //执行解密  
            b_ecb.decrypt(b_byteArray);  
              
            return convertByteArrayToString(b_byteArray);  
        }  
          
        /** 
         * String转ByteArray  
         * @param str 
         * @return  
         */       
        public function convertStringToByteArray(str:String):ByteArray   
        {   
            var bytes:ByteArray;   
            if (str)   
            {   
                bytes=new ByteArray();   
                bytes.writeUTFBytes(str);   
            }   
            return bytes;   
        }   
        /** 
         * ByteArray转String 
         * @param bytes 
         * @return  
         */       
        public function convertByteArrayToString(bytes:ByteArray):String   
        {   
            var str:String;   
            if (bytes)   
            {   
                bytes.position=0;   
                str=bytes.readUTFBytes(bytes.length);   
            }   
            return str;   
        }  
        /** 
         * 把ByteArray转换为16进制的形式的字符串 
         * @param ba 
         * @param name 
         * @return  
         */       
        private function byteArrayTo16(ba:ByteArray):String{  
            ba.position=0;  
            var b_str:String="";  
            while (ba.bytesAvailable > 0) {  
                var b_s:String=ba.readUnsignedByte().toString(16);  
//              trace("b_s:",b_s);  
                if(b_s.length<2) b_s="0"+b_s;  
                b_str+=b_s;  
            }  
            return b_str;  
        }  
        private function from16ToByteArray(str:String):ByteArray{  
            var b_ba:ByteArray=new ByteArray();  
            var b_arr:Array=str.split("");  
            var b_length:int=b_arr.length;  
            for(var i:int=0;i<b_length-1;i+=2){  
                var b_char1:String=b_arr[i];  
                var b_char2:String=b_arr[i+1];  
                var b_byte:int=parseInt(b_char1+b_char2,16);  
//              trace("b_byte:",b_byte);  
                b_ba.writeByte(b_byte);  
            }  
            return b_ba;  
        }  
          
    }  
}  
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