Linux下运行java DES解密失败，报javax.crypto.BadPaddingException:Given final block not properly padded

1、报错内容

avax.crypto.BadPaddingException: Given final block not properly padded
at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:810)
at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:675)
at com.sun.crypto.provider.DESCipher.engineDoFinal(DESCipher.java:314)
at javax.crypto.Cipher.doFinal(Cipher.java:1976)

2、

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

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

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

public class DesEncryptUtil {

private Key key;

public DesEncryptUtil() {
setKey2("hahhah");
}
/**
* 根据参数生成KEY
*
* @param strKey
*
* Windows下正常 Linux 下报错
*/
public void setKey(String strKey) {
try {
KeyGenerator _generator = KeyGenerator.getInstance("DES");
_generator.init(new SecureRandom(strKey.getBytes()));
this.key = _generator.generateKey();
_generator = null;
} catch (Exception e) {
e.printStackTrace();
}
}

//Linux 系统下正常运行
public void setKey2(String strKey) {
try {
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
DESKeySpec keySpec = new DESKeySpec(strKey.getBytes("utf-8"));
this.key = keyFactory.generateSecret(keySpec);
} catch (Exception e) {
e.printStackTrace();
}finally{

}
}

public static void main(String[] args) {

DesEncryptUtil u = new DesEncryptUtil();
for (int i = 1; i < 100; i++) {
//加密
String encString = u.getEncString(""+i);
//解密
String desString = u.getDesString(encString);
System.err.println("encString:"+encString+";desString:"+desString+":"+i);
if (!desString.equals(""+i)) {
System.err.println(i+":错误：encString:"+encString+";desString:"+desString);
}
}
}

/**
* 加密String明文输入,String密文输出
*
* @param strMing
* @return 加密
*/
public String getEncString(String strMing) {
byte[] byteMi = null;
byte[] byteMing = null;
String strMi = "";
BASE64Encoder base64en = new BASE64Encoder();
try {
byteMing = strMing.getBytes("UTF-8");
byteMi = getEncCode(byteMing);
strMi = base64en.encode(byteMi);
} catch (Exception e) {
e.printStackTrace();
} finally {
base64en = null;
byteMing = null;
byteMi = null;
}
return strMi;
}

/**
* 解密 以String密文输入,String明文输出
*
* @param strMi
* @return 解密
*/
public String getDesString(String strMi) {
BASE64Decoder base64De = new BASE64Decoder();
byte[] byteMing = null;
byte[] byteMi = null;
String strMing = "";
try {
byteMi = base64De.decodeBuffer(strMi);
byteMing = getDesCode(byteMi);
strMing = new String(byteMing, "UTF-8");
} catch (Exception e) {
e.printStackTrace();
} finally {
base64De = null;
byteMing = null;
byteMi = null;
}
return strMing;
}

/**
* 加密以byte[]明文输入,byte[]密文输出
*
* @param byteS
* @return
*/
private byte[] getEncCode(byte[] byteS) {
byte[] byteFina = null;
Cipher cipher;
try {
cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, key);
byteFina = cipher.doFinal(byteS);
} catch (Exception e) {
e.printStackTrace();
} finally {
cipher = null;
}
return byteFina;
}

/**
* 解密以byte[]密文输入,以byte[]明文输出
*
* @param byteD
* @return
*/
private byte[] getDesCode(byte[] byteD) {
Cipher cipher;
byte[] byteFina = null;
try {
cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, this.key);
byteFina = cipher.doFinal(byteD);
} catch (Exception e) {
e.printStackTrace();
} finally {
cipher = null;
}
return byteFina;
}

}


3、解释 ，所以setKey时  用 //Linux 系统下  public void setKey2(String strKey) {}方法

  

* SecureRandom 实现完全随操作系统本身的內部状态，除非调用方在调用 getInstance 方法，然后调用 setSeed 方法；
* 该实现在 windows 上每次生成的 key 都相同，但是在 solaris 或部分 linux 系统上则不同。
* 关于SecureRandom类的详细介绍，见 http://yangzb.iteye.com/blog/325264
参考：

http://blog.csdn.net/rj042/article/details/8196125

http://www.cnblogs.com/digdeep/p/5580244.html