aes_encryption.AES_Encryption.java Source code

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Here is the source code for aes_encryption.AES_Encryption.java

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/*
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package aes_encryption;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;

/**
 *
 * @author Alex Lp
 */
public class AES_Encryption {

    private static SecretKeySpec secretKey;
    private static byte[] key;
    private static String decryptedString;
    private static String encryptedString;

    public static void setKey(String myKey) {

        MessageDigest sha = null;
        try {
            key = myKey.getBytes("UTF-8");
            System.out.println(key.length);
            sha = MessageDigest.getInstance("SHA-1");
            key = sha.digest(key);
            key = Arrays.copyOf(key, 16); //change the bits later 128 then 256
            System.out.println(key.length);
            System.out.println(new String(key, "UTF-8"));
            secretKey = new SecretKeySpec(key, "AES");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }

    public static String getDecryptedString() {
        return decryptedString;
    }

    public static void setDecryptedString(String decryptedString) {
        AES_Encryption.decryptedString = decryptedString;
    }

    public static String getEncryptedString() {
        return encryptedString;
    }

    public static void setEncryptedString(String encryptedString) {
        AES_Encryption.encryptedString = encryptedString;
    }

    public static String encrypt(String strToEncrypt) {
        try {
            Cipher cipher = Cipher.getInstance("AES_Encryption/ECB/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, secretKey);
            setEncryptedString(Base64.encodeBase64String(cipher.doFinal(strToEncrypt.getBytes("UTF-8"))));
        } catch (Exception e) {
            System.out.println("Error while encrypting: " + e.toString());
        }
        return null;
    }

    public static String decrypt(String strToDecrypt) {

        try {
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");

            cipher.init(Cipher.DECRYPT_MODE, secretKey);
            setDecryptedString(new String(cipher.doFinal(Base64.decodeBase64(strToDecrypt))));

        } catch (Exception e) {

            System.out.println("Error while decrypting: " + e.toString());
        }
        return null;
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        final String strtoEncrypt = "TEST";
        final String strPassword = "1234567890";
        AES_Encryption.setKey(strPassword);

        AES_Encryption.encrypt(strtoEncrypt.trim());

        System.out.println("String to Encrypt: " + strtoEncrypt);
        System.out.println("Encrypted: " + AES_Encryption.getEncryptedString());

        final String strToDecrypt = AES_Encryption.getEncryptedString();
        AES_Encryption.decrypt(strToDecrypt.trim());

        System.out.println("String To Decrypt : " + strToDecrypt);
        System.out.println("Decrypted : " + AES_Encryption.getDecryptedString());

    }

}