controlpac.EncryptHelper.java Source code

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Here is the source code for controlpac.EncryptHelper.java

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/*
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package controlpac;

/**
 *
 * @author Diego
 */
import java.security.MessageDigest;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;

public class EncryptHelper {
    static String secretKey = "Pacientes"; //llave para encriptar datos

    public static String Encriptar(String texto) {
        String base64EncryptedString = "";
        try {
            MessageDigest md = MessageDigest.getInstance("MD5"); //Crea un hash con la clave elegida
            byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
            byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
            SecretKey key = new SecretKeySpec(keyBytes, "DESede"); //Crea la clave
            Cipher cipher = Cipher.getInstance("DESede");
            cipher.init(Cipher.ENCRYPT_MODE, key);//Inicializa el cifrado con la clave
            byte[] plainTextBytes = texto.getBytes("utf-8");
            byte[] buf = cipher.doFinal(plainTextBytes);//Cifra el texto
            byte[] base64Bytes = Base64.encodeBase64(buf);//Encodea el texto en base64
            base64EncryptedString = new String(base64Bytes);
        } catch (Exception ex) {
        }
        return base64EncryptedString;
    }

    public static String Desencriptar(String textoEncriptado) {
        String base64EncryptedString = "";
        try {
            byte[] message = Base64.decodeBase64(textoEncriptado.getBytes("utf-8"));//Desencodea el texto en base64
            MessageDigest md = MessageDigest.getInstance("MD5");
            byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8")); //Crea un hash con la clave elegida
            byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
            SecretKey key = new SecretKeySpec(keyBytes, "DESede");//Crea la clave 
            Cipher decipher = Cipher.getInstance("DESede");
            decipher.init(Cipher.DECRYPT_MODE, key); //Inicia el descifrado
            byte[] plainText = decipher.doFinal(message);//Descifra el texto
            base64EncryptedString = new String(plainText, "UTF-8");
        } catch (Exception ex) {
        }
        return base64EncryptedString;
    }
}