TripleDea.java

import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import java.util.Base64;

public class TripleDea {

    private static final String UNICODE_FORMAT = "UTF8";
    public static final String DESEDE_ENCRYPTION_SCHEME = "DESede";
    private KeySpec ks;
    private SecretKeyFactory skf;
    private Cipher cipher;
    byte[] arrayBytes;
    private String myEncryptionKey;
    private String myEncryptionScheme;
    SecretKey key;

    public TripleDea() {
        try {
            myEncryptionKey = "ThisIsSpartaThisIsSparta";
            myEncryptionScheme = DESEDE_ENCRYPTION_SCHEME;
            arrayBytes = myEncryptionKey.getBytes(UNICODE_FORMAT);
            ks = new DESedeKeySpec(arrayBytes);
            skf = SecretKeyFactory.getInstance(myEncryptionScheme);
            cipher = Cipher.getInstance(myEncryptionScheme);
            key = skf.generateSecret(ks);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    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);
            encryptedString = new String(Base64.getEncoder().encode(encryptedText));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return encryptedString;
    }

    public String decrypt(String encryptedString) {
        String decryptedText = null;
        byte[] encryptedStringBytes = encryptedString.getBytes();
        try {
            cipher.init(Cipher.DECRYPT_MODE, key);
            byte[] encryptedText = Base64.getDecoder().decode(encryptedStringBytes);
            byte[] plainText = cipher.doFinal(encryptedText);
            decryptedText = new String(plainText);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return decryptedText;
    }

    /*public static void main(String args[]) {
        TripleDea td = new TripleDea();

        String target = "imparator";
        String encrypted = td.encrypt(target);
        String decrypted = td.decrypt(encrypted);

        System.out.println("String To Encrypt: " + target);
        System.out.println("Encrypted String:" + encrypted);
        System.out.println("Decrypted String:" + decrypted);

    }*/
}