网上找了一个DES安全编码组件，据说用的人挺多的，也用了挺长一段时间，在Windows下一直很正常，没出什么问题，但是迁到linux下时，算法没有正常工作，报出了异常：

javax.crypto.BadPaddingException: Given final block not properly padded
        at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:811)
        at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:676)
        at com.sun.crypto.provider.DESCipher.engineDoFinal(DESCipher.java:314)
        at javax.crypto.Cipher.doFinal(Cipher.java:2087)
        at BidCoder.decrypt(BidCoder.java:122)
        at BidCoder.closePass(BidCoder.java:193)
        at BidCoder.main(BidCoder.java:204)

然后根据提示BidCoder.decrypt(BidCoder.java:122)，找到源码的第122行，

return cipher.doFinal(data);

网上也查到这个异常的相关信息，主要是说是由于算法填充块产生的异常，但没有找到解决方法。  希望各位高手们给给建议，源码如下：

import java.security.Key;
import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.SecretKeySpec;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
 * DES安全编码组件
 * 
 * <pre>
 * 支持 DES、DESede(TripleDES,就是3DES)、AES、Blowfish、RC2、RC4(ARCFOUR)
 * DES          		key size must be equal to 56
 * DESede(TripleDES) 	key size must be equal to 112 or 168
 * AES          		key size must be equal to 128, 192 or 256,but 192 and 256 bits may not be available
 * Blowfish     		key size must be multiple of 8, and can only range from 32 to 448 (inclusive)
 * RC2          		key size must be between 40 and 1024 bits
 * RC4(ARCFOUR) 		key size must be between 40 and 1024 bits
 * 具体内容 需要关注 JDK Document http://.../docs/technotes/guides/security/SunProviders.html
 * </pre>
 * 
 * @author 梁栋
 * @version 1.0
 * @since 1.0
 */
public abstract class BidCoder {

	/**
	 * ALGORITHM 算法 <br>
	 * 可替换为以下任意一种算法，同时key值的size相应改变。
	 * 
	 * <pre>
	 * DES          		key size must be equal to 56
	 * DESede(TripleDES) 	key size must be equal to 112 or 168
	 * AES          		key size must be equal to 128, 192 or 256,but 192 and 256 bits may not be available
	 * Blowfish     		key size must be multiple of 8, and can only range from 32 to 448 (inclusive)
	 * RC2          		key size must be between 40 and 1024 bits
	 * RC4(ARCFOUR) 		key size must be between 40 and 1024 bits
	 * </pre>
	 * 
	 * 在Key toKey(byte[] key)方法中使用下述代码
	 * <code>SecretKey secretKey = new SecretKeySpec(key, ALGORITHM);</code> 替换
	 * <code>
	 * DESKeySpec dks = new DESKeySpec(key);
	 * SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
	 * SecretKey secretKey = keyFactory.generateSecret(dks);
	 * </code>
	 */

	// DESede(TripleDES)、AES、Blowfish、RC2、RC4(ARCFOUR)。

	/**
	 * 转换密钥<br>
	 * 
	 * @param key
	 * @param algorithm
	 *            算法
	 * @return
	 * @throws Exception
	 */

	private static Key toKey(byte[] key, String algorithm) throws Exception {
		SecretKey secretKey;
		if (algorithm.equals("DES")) {
			DESKeySpec dks = new DESKeySpec(key);
			SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(algorithm);
			secretKey = keyFactory.generateSecret(dks);
		}
		// 当使用其他对称加密算法时，如AES、Blowfish等算法时，用下述代码替换上述三行代码
		else {
			secretKey = new SecretKeySpec(key, algorithm);
		}
		return secretKey;
	}

	/**
	 * BASE64解密
	 * 
	 * @param key
	 * @return
	 * @throws Exception
	 */
	public static byte[] decryptBASE64(String key) throws Exception {
		return (new BASE64Decoder()).decodeBuffer(key);
	}

	/**
	 * BASE64加密
	 * 
	 * @param key
	 * @return
	 * @throws Exception
	 */
	public static String encryptBASE64(byte[] key) throws Exception {
		return (new BASE64Encoder()).encodeBuffer(key);
	}

	/**
	 * 解密
	 * 
	 * @param data
	 * @param key
	 * @return
	 * @throws Exception
	 */
	public static byte[] decrypt(byte[] data, String key, String algorithm) throws Exception {
		Key k = null;
		Cipher cipher = null;
		k = toKey(decryptBASE64(key), algorithm);
		try {
			cipher = Cipher.getInstance(algorithm);
			cipher.init(Cipher.DECRYPT_MODE, k);
		} catch (Exception e) {
			System.out.println(e + "   toKey 出异常了");
		}
		return cipher.doFinal(data);
	}

	/**
	 * 加密
	 * 
	 * @param data
	 * @param key
	 * @return
	 * @throws Exception
	 */
	public static byte[] encrypt(byte[] data, String key, String algorithm) throws Exception {
		Key k = toKey(decryptBASE64(key), algorithm);
		Cipher cipher = Cipher.getInstance(algorithm);
		cipher.init(Cipher.ENCRYPT_MODE, k);

		return cipher.doFinal(data);
	}

	/**
	 * 生成密钥
	 * 
	 * @return
	 * @throws Exception
	 */
	public static String initKey(String algorithm) throws Exception {
		return initKey(null, algorithm);
	}

	/**
	 * 生成密钥
	 * 
	 * @param seed
	 * @return
	 * @throws Exception
	 */
	public static String initKey(String seed, String algorithm) throws Exception {
		SecureRandom secureRandom = null;
		if (seed != null) {
			secureRandom = new SecureRandom(decryptBASE64(seed));
		} else {
			secureRandom = new SecureRandom();
		}
		KeyGenerator kg = KeyGenerator.getInstance(algorithm);
		kg.init(secureRandom);
		SecretKey secretKey = kg.generateKey();
		return encryptBASE64(secretKey.getEncoded());
	}

	public static String beginPass(String key, String method, String password) {
		String pasString = "";
		try {
			key = BidCoder.initKey(key, method);
			byte[] inputData = password.getBytes();
			inputData = BidCoder.encrypt(inputData, key, method);
			pasString = BidCoder.encryptBASE64(inputData);

		} catch (Exception e) {
			System.out.println(e + "   beginPass 出异常了");
		}

		return pasString;

	}

	public static String closePass(String key, String method, String password) throws Exception {
		String outputStr = "";
		key = BidCoder.initKey(key, method);
		// byte[] outputData =
		// BidCoder.decrypt(BidCoder.decryptBASE64(password), key, method);
		byte[] a = BidCoder.decryptBASE64(password);
		byte[] outputData = BidCoder.decrypt(a, key, method);
		outputStr = new String(outputData);
		return outputStr;
	}

	public static void main(String args[]) {
		String key = "";
		String str2 = "";
		try {
			key = BidCoder.beginPass("hello", "DES", "123");
			System.err.println(key);
			str2 = BidCoder.closePass("hello", "DES", "YTjNKKbGzJ4=");
			System.err.println(str2);
		} catch (Exception e) {
			e.printStackTrace();
		}

	}
}

 还烦请各位大哥帮忙看看哈~~先谢谢啦~