import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class DESedeEncryption {
private static final String UNICODE_FORMAT = "UTF8";
public static final String DESEDE_ENCRYPTION_SCHEME = "DESede";
private KeySpec myKeySpec;
private SecretKeyFactory mySecretKeyFactory;
private Cipher cipher;
byte[] keyAsBytes;
private String myEncryptionKey;
private String myEncryptionScheme;
SecretKey key;
public DESedeEncryption()
{
}
public DESedeEncryption(String skey) throws Exception
{
myEncryptionKey = skey;//"This Is Secret Encryption Key";
myEncryptionScheme = DESEDE_ENCRYPTION_SCHEME;
keyAsBytes = myEncryptionKey.getBytes(UNICODE_FORMAT);
for(int i=0;i<keyAsBytes.length;i++)
System.out.print(keyAsBytes[i]);
System.out.print("\n");
myKeySpec = new DESedeKeySpec(keyAsBytes);
mySecretKeyFactory = SecretKeyFactory.getInstance(myEncryptionScheme);
cipher = Cipher.getInstance(myEncryptionScheme);
key = mySecretKeyFactory.generateSecret(myKeySpec);
}
public String encrypt(String unencryptedString) {
String encryptedString = null;
try {
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] plainText = unencryptedString.getBytes(UNICODE_FORMAT);
byte[] encryptedText = cipher.doFinal(plainText);
BASE64Encoder base64encoder = new BASE64Encoder();
encryptedString = base64encoder.encode(encryptedText);
} catch (Exception e) {
e.printStackTrace();
}
return encryptedString;
}
public String decrypt(String encryptedString) {
String decryptedText=null;
try {
cipher.init(Cipher.DECRYPT_MODE, key);
BASE64Decoder base64decoder = new BASE64Decoder();
byte[] encryptedText = base64decoder.decodeBuffer(encryptedString);
byte[] plainText = cipher.doFinal(encryptedText);
decryptedText= bytes2String(plainText);
} catch (Exception e) {
e.printStackTrace();
}
return decryptedText;
}
private static String bytes2String(byte[] bytes) {
StringBuffer stringBuffer = new StringBuffer();
for (int i = 0; i <bytes.length; i++) {
stringBuffer.append((char) bytes[i]);
}
return stringBuffer.toString();
}
public static void main(String args []) throws Exception
{
String stringToEncrypt="wel come";
DESedeEncryption myEncryptor= new DESedeEncryption("This Is Secret Encryption This Is Secret Encryption This Is Secret Encryption");
System.out.println("String To Encrypt: "+stringToEncrypt);
String encrypted=myEncryptor.encrypt(stringToEncrypt);
System.out.println("Encrypted Value : "+ encrypted);
String decrypted=myEncryptor.decrypt(encrypted);
System.out.println("Decrypted Value : "+decrypted);
}
}