Copy the code code as follows:
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;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class Des
{
public static final String ALGORITHM_DES = "DES/CBC/PKCS5Padding";
private static Log log = LogFactory.getLog(Des.class);
/**
* DES algorithm, encryption
*
* @param data string to be encrypted
* @param key Encryption private key, the length cannot be less than 8 bits
* @return Encrypted byte array, generally used in combination with Base64 encoding
* @throws CryptException exception
*/
public static String encode(String key,String data) throws Exception
{
return encode(key, data.getBytes());
}
/**
* DES algorithm, encryption
*
* @param data string to be encrypted
* @param key Encryption private key, the length cannot be less than 8 bits
* @return Encrypted byte array, generally used in combination with Base64 encoding
* @throws CryptException exception
*/
public static String encode(String key,byte[] data) throws Exception
{
try
{
DESKeySpec dks = new DESKeySpec(key.getBytes());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
//The length of key cannot be less than 8 bytes
Key secretKey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance(ALGORITHM_DES);
IvParameterSpec iv = new IvParameterSpec("********".getBytes());
AlgorithmParameterSpec paramSpec = iv;
cipher.init(Cipher.ENCRYPT_MODE, secretKey,paramSpec);
byte[] bytes = cipher.doFinal(data);
return Base64.encode(bytes);
} catch (Exception e)
{
throw new Exception(e);
}
}
/**
* DES algorithm, decryption
*
* @param data string to be decrypted
* @param key Decryption private key, the length cannot be less than 8 bits
* @return decrypted byte array
* @throws Exception exception
*/
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");
//The length of key cannot be less than 8 bytes
Key secretKey = keyFactory.generateSecret(dks);
Cipher cipher = Cipher.getInstance(ALGORITHM_DES);
IvParameterSpec iv = new IvParameterSpec("********".getBytes());
AlgorithmParameterSpec paramSpec = iv;
cipher.init(Cipher.DECRYPT_MODE, secretKey,paramSpec);
return cipher.doFinal(data);
} catch (Exception e)
{
// e.printStackTrace();
throw new Exception(e);
}
}
/**
* Get the encoded value
* @param key
* @param data
* @return
* @throwsException
* @throwsException
*/
public static String decodeValue(String key,String data) throws Exception
{
byte[] datas;
String value = null;
datas = decode(key, Base64.decode(data));
value = new String(datas);
if (value.equals("")){
throw new Exception();
}
return value;
}
}