XXTEA加解密as3和python分别实现

最新推荐文章于 2024-06-10 11:46:38 发布

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最新推荐文章于 2024-06-10 11:46:38 发布 · 5.1k 阅读

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文章标签：

#adobe #flash #加密 #ActionScript

本文提供了XXTEA加解密算法在ActionScript和Python中的实现，包括具体的代码示例，以及Python中的xxtea.py和test.py测试代码。

加解密代码

package 
{
	import flash.display.Shape;
	import flash.display.Sprite;
	import flash.utils.ByteArray;
	
	public class Test extends Sprite {
		
		public function Test() {
			var dataStr:String = "Today's weather is good.";
			var data:ByteArray = new ByteArray();
			data.writeMultiByte(dataStr, "utf-8");
			
			var keyStr:String = "abcxyz123";
			var key:ByteArray = new ByteArray();
			key.writeMultiByte(keyStr, "utf-8");
			trace("data:", dataStr);
			trace("key:", keyStr);
			
			//加密
			var encryptData:ByteArray = XXTEA.encrypt(data, key);
			var content:String = Base64.encodeByteArray(encryptData);
			trace("encode: " + content);
			
			//解密
			encryptData = Base64.decodeToByteArray(content);
			var sourceBtyes:ByteArray = XXTEA.decrypt(encryptData, key);
			var sourceStr:String = sourceBtyes.toString();
			trace("decode: " + sourceStr );
			
		}
	}
}

XXTEA加解密用到了Base64，以下是XXTEA和Base64的代码

XXTEA的代码　

package 
{	
	import flash.utils.ByteArray;   
	import flash.utils.Endian;   
	
	public class XXTEA {  
		
		private static const delta:uint = uint(0x9E3779B9);   
		
		private static function LongArrayToByteArray(data:Array, includeLength:Boolean):ByteArray {   
			var length:uint = data.length;   
			var n:uint = (length - 1) << 2;   
			if (includeLength) {   
				var m:uint = data[length - 1];   
				if ((m < n - 3) || (m > n)) {   
					return null;   
				}   
				n = m;   
			}   
			var result:ByteArray = new ByteArray();   
			result.endian = Endian.LITTLE_ENDIAN;   
			for (var i:uint = 0; i < length; i++) {   
				result.writeUnsignedInt(data[i]);   
			}   
			if (includeLength) {   
				result.length = n;   
				return result;   
			}   
			else {   
				return result;   
			}   
		}  
		
		private static function ByteArrayToLongArray(data:ByteArray, includeLength:Boolean):Array {   
			var length:uint = data.length;   
			var n:uint = length >> 2;   
			if (length % 4 > 0) {   
				n++;   
				data.length += (4 - (length % 4));   
			}   
			data.endian = Endian.LITTLE_ENDIAN;   
			data.position = 0;   
			var result:Array = [];   
			for (var i:uint = 0; i < n; i++) {   
				result[