php代碼:

<?phpclass DES{	var $key;	var $iv; //偏移量 	function DES($key, $iv=0)	{		$this->key = $key;		if($iv == 0)		{			$this->iv = $key;		}		else 		{			$this->iv = $iv;		}	} 	//加密	function encrypt($str)	{				$size = mcrypt_get_block_size ( MCRYPT_DES, MCRYPT_MODE_CBC );		$str = $this->pkcs5Pad ( $str, $size ); 		$data=mcrypt_cbc(MCRYPT_DES, $this->key, $str, MCRYPT_ENCRYPT, $this->iv);		//$data=strtoupper(bin2hex($data)); //返回大寫十六進制字符串		return base64_encode($data);	} 	//解密	function decrypt($str)	{		$str = base64_decode ($str);		//$strBin = $this->hex2bin( strtolower($str));		$str = mcrypt_cbc(MCRYPT_DES, $this->key, $str, MCRYPT_DECRYPT, $this->iv );		$str = $this->pkcs5Unpad( $str );		return $str;	} 	function hex2bin($hexData)	{		$binData = "";		for($i = 0; $i < strlen ( $hexData ); $i += 2)		{			$binData .= chr(hexdec(substr($hexData, $i, 2)));		}		return $binData;	} 	function pkcs5Pad($text, $blocksize)	{		$pad = $blocksize - (strlen ( $text ) % $blocksize);		return $text . str_repeat ( chr ( $pad ), $pad );	} 	function pkcs5Unpad($text)	{		$pad = ord ( $text {strlen ( $text ) - 1} );		if ($pad > strlen ( $text ))			return false;		if (strspn ( $text, chr ( $pad ), strlen ( $text ) - $pad ) != $pad)			return false;		return substr ( $text, 0, - 1 * $pad );	}}$str = 'abcd';$key= 'asdfwef5';$crypt = new DES($key);$mstr = $crypt->encrypt($str);$str = $crypt->decrypt($mstr); echo $str.' <=> '.$mstr; ?>

Java代碼:

package com.test; import it.sauronsoftware.base64.Base64; import Java.security.Key;import Java.security.SecureRandom;import Java.security.spec.AlgorithmParameterSpec; import Javax.crypto.Cipher;import Javax.crypto.SecretKeyFactory;import Javax.crypto.spec.DESKeySpec;import Javax.crypto.spec.IvParameterSpec; public class Main{  public static final String ALGORITHM_DES = "DES/CBC/PKCS5Padding";  /**   * DES算法，加密   *   * @param data 待加密字符串   * @param key 加密私鑰，長度不能夠小于8位   * @return 加密后的字節數組，一般結合Base64編碼使用   * @throws CryptException 異常   */  public static String encode(String key,String data) throws Exception  {    return encode(key, data.getBytes());  }  /**   * DES算法，加密   *   * @param data 待加密字符串   * @param key 加密私鑰，長度不能夠小于8位   * @return 加密后的字節數組，一般結合Base64編碼使用   * @throws CryptException 異常   */  public static String encode(String key,byte[] data) throws Exception  {    try    {	  	DESKeySpec dks = new DESKeySpec(key.getBytes()); 	  	SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");      //key的長度不能夠小于8位字節      Key secretKey = keyFactory.generateSecret(dks);      Cipher cipher = Cipher.getInstance(ALGORITHM_DES);      IvParameterSpec iv = new IvParameterSpec(key.getBytes());      AlgorithmParameterSpec paramSpec = iv;      cipher.init(Cipher.ENCRYPT_MODE, secretKey,paramSpec);       byte[] bytes = cipher.doFinal(data);  //      return byte2hex(bytes);      return new String(Base64.encode(bytes));    } catch (Exception e)    {      throw new Exception(e);    }  }   /**   * DES算法，解密   *   * @param data 待解密字符串   * @param key 解密私鑰，長度不能夠小于8位   * @return 解密后的字節數組   * @throws Exception 異常   */  public static byte[] decode(String key,byte[] data) throws Exception  {    try    {    	SecureRandom sr = new SecureRandom();	  	DESKeySpec dks = new DESKeySpec(key.getBytes());	  	SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");      //key的長度不能夠小于8位字節      Key secretKey = keyFactory.generateSecret(dks);      Cipher cipher = Cipher.getInstance(ALGORITHM_DES);      IvParameterSpec iv = new IvParameterSpec(key.getBytes());      AlgorithmParameterSpec paramSpec = iv;      cipher.init(Cipher.DECRYPT_MODE, secretKey,paramSpec);      return cipher.doFinal(data);    } catch (Exception e)    {      throw new Exception(e);    }  }   /**   * 獲取編碼后的值   * @param key   * @param data   * @return   * @throws Exception   */  public static String decodeValue(String key,String data)   {  	byte[] datas;  	String value = null;		try { 	  		datas = decode(key, Base64.decode(data.getBytes())); 			value = new String(datas);		} catch (Exception e) {			value = "";		}  	return value;  }   public static void main(String[] args) throws Exception  {  	System.out.println("明：abcd ；密：" + Main.encode("asdfwef5","abcd"));  }}

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