Exception: "Given final block not properly padded" in Linux, but it works in Windows
- by user1685364
My application works in windows, but fails in Linux with Given final block not properly padded exception.
Configuration:
JDK Version: 1.6
Windows : version 7
Linux : CentOS 5.8 64bit
My code is below:
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class SecurityKey {
private static Key key = null;
private static String encode = "UTF-8";
private static String cipherKey = "DES/ECB/PKCS5Padding";
static {
try {
KeyGenerator generator = KeyGenerator.getInstance("DES");
String seedStr = "test";
generator.init(new SecureRandom(seedStr.getBytes()));
key = generator.generateKey();
} catch(Exception e) {
}
}
// SecurityKey.decodeKey("password")
public static String decodeKey(String str) throws Exception {
if(str == null)
return str;
Cipher cipher = null;
byte[] raw = null;
BASE64Decoder decoder = new BASE64Decoder();
String result = null;
cipher = Cipher.getInstance(cipherKey);
cipher.init(Cipher.DECRYPT_MODE, key);
raw = decoder.decodeBuffer(str);
byte[] stringBytes = null;
stringBytes = cipher.doFinal(raw); // Exception!!!!
result = new String(stringBytes, encode);
return result;
}
}
At the line:
ciper.doFilnal(raw);
the following exception is thrown:
javax.crypto.BadPaddingException: Given final block not properly padded
How can I fix this issue?
