Example usage for javax.crypto Cipher getInstance

Introduction

In this page you can find the example usage for javax.crypto Cipher getInstance.

Prototype

public static final Cipher getInstance(String transformation)
        throws NoSuchAlgorithmException, NoSuchPaddingException 

Source Link

Document

Returns a Cipher object that implements the specified transformation.

Usage

From source file:Conexion.newClass.java

public String encode(String texto) throws EncoderException {
    String secretKey = "mailEncrypted"; //llave para encriptar datos
    String base64EncryptedString = "";

    try {//from w  w  w  .  j av  a2s. c  o m

        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);

        SecretKey key = new SecretKeySpec(keyBytes, "DESede");
        Cipher cipher = Cipher.getInstance("DESede");
        cipher.init(Cipher.ENCRYPT_MODE, key);

        byte[] plainTextBytes = texto.getBytes("utf-8");
        byte[] buf = cipher.doFinal(plainTextBytes);
        byte[] base64Bytes = Base64.encodeBase64(buf);
        base64EncryptedString = new String(base64Bytes);
    } catch (Exception ex) {
    }
    return base64EncryptedString;
}

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From source file:Main.java

private static Cipher genCipher(char[] pass, byte[] salt, String factory, int iterations, int mode)
        throws NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidKeyException,
        InvalidAlgorithmParameterException {
    PBEKeySpec keySpec = new PBEKeySpec(pass, salt, iterations, 128);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(factory);
    SecretKey key = keyFactory.generateSecret(keySpec);
    AlgorithmParameterSpec spec = new PBEParameterSpec(salt, iterations);
    Cipher cipher = Cipher.getInstance(factory);
    cipher.init(mode, key, spec);/*from ww w  . j  a  va2s . co m*/
    return cipher;
}

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From source file:com.tesora.dve.common.PECryptoUtils.java

private static Cipher createCrypter(int mode) throws Exception {
    // Create the key
    KeySpec keySpec = new PBEKeySpec(settings.getPassword().toCharArray(), settings.getSalt(),
            settings.getIterations());//  ww  w. j a  v a2s. com
    SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);

    Cipher cipher = Cipher.getInstance(key.getAlgorithm());

    cipher.init(mode, key, new PBEParameterSpec(settings.getSalt(), settings.getIterations()));

    return cipher;
}

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From source file:com.enviosya.client.tool.Tool.java

public String Encriptar(String texto) {

    //llave para encriptar datos
    String base64EncryptedString = "";

    try {/*from w ww  .j  a v a2s . co  m*/

        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);

        SecretKey key = new SecretKeySpec(keyBytes, "DESede");
        Cipher cipher = Cipher.getInstance("DESede");
        cipher.init(Cipher.ENCRYPT_MODE, key);

        byte[] plainTextBytes = texto.getBytes("utf-8");
        byte[] buf = cipher.doFinal(plainTextBytes);
        byte[] base64Bytes = Base64.encodeBase64(buf);
        base64EncryptedString = new String(base64Bytes);

    } catch (Exception e) {
        //Ac tengo que agregar el retorno de la exception
    }
    return base64EncryptedString;
}

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From source file:it.geosolutions.figis.persistence.dao.util.PwEncoder.java

/**
 * Encoding the password on base64// w  ww . j  a  va 2 s  .c  o  m
 * @param msg
 * @return
 */
public static String encode(String msg) {
    try {
        SecretKeySpec keySpec = new SecretKeySpec(KEY, "AES");
        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, keySpec);

        byte[] input = msg.getBytes();
        byte[] encrypted = cipher.doFinal(input);
        byte[] output = Base64.encodeBase64(encrypted);

        return new String(output);
    } catch (NoSuchAlgorithmException ex) {
        throw new RuntimeException("Error while encoding", ex);
    } catch (NoSuchPaddingException ex) {
        throw new RuntimeException("Error while encoding", ex);
    } catch (IllegalBlockSizeException ex) {
        throw new RuntimeException("Error while encoding", ex);
    } catch (BadPaddingException ex) {
        throw new RuntimeException("Error while encoding", ex);
    } catch (InvalidKeyException ex) {
        throw new RuntimeException("Error while encoding", ex);
    }
}

---

From source file:lib.clases_cripto.java

public static String Desencriptar(String textoEncriptado) throws Exception {

    String secretKey = "qualityinfosolutions"; //llave para desenciptar datos
    String base64EncryptedString = "";

    try {/*from w  ww  .  j  a v a2s  .c o m*/
        byte[] message = Base64.decodeBase64(textoEncriptado.getBytes("utf-8"));
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
        SecretKey key = new SecretKeySpec(keyBytes, "DESede");

        Cipher decipher = Cipher.getInstance("DESede");
        decipher.init(Cipher.DECRYPT_MODE, key);

        byte[] plainText = decipher.doFinal(message);

        base64EncryptedString = new String(plainText, "UTF-8");

    } catch (Exception ex) {
    }
    return base64EncryptedString;
}

---

From source file:controlpac.EncryptHelper.java

public static String Desencriptar(String textoEncriptado) {
    String base64EncryptedString = "";
    try {/*from  ww  w. j a  v  a2s .  co m*/
        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;
}

---

From source file:com.bytecode.util.Crypto.java

private static byte[] encrypt(String keystring, String message, int bits) throws Exception {
    byte[] encValue = null;
    SecureRandom random = new SecureRandom();
    byte[] nonceBytes = new byte[8];
    random.nextBytes(nonceBytes);//from  w  w w  .  j  a v a 2  s  .c  om
    IvParameterSpec nonce = new IvParameterSpec(Arrays.copyOf(nonceBytes, 16));

    Key key = generateKey(keystring, bits);
    Cipher c = Cipher.getInstance(ALGORITHM);
    c.init(Cipher.ENCRYPT_MODE, key, nonce);
    byte[] ciphertextWithoutNonce = c.doFinal(message.getBytes("UTF-8"));
    encValue = Arrays.copyOf(nonceBytes, nonceBytes.length + ciphertextWithoutNonce.length);
    for (int i = 0; i < ciphertextWithoutNonce.length; i++) {
        encValue[i + 8] = ciphertextWithoutNonce[i];
    }

    return encValue;
}

---

From source file:io.zipi.common.util.AesEncrypter.java

/**
 * Encrypt./*from  ww w .  ja va 2  s  .  c  o m*/
 * @param plainText the plain text
 * @param secretKey the secret key
 * @return the string
 */
public static String encrypt(String secretKey, String plainText) {
    if (plainText == null) {
        return null;
    }
    byte[] encrypted;
    Cipher cipher;
    try {
        SecretKeySpec skeySpec = keySpecFromSecretKey(secretKey);

        cipher = Cipher.getInstance("AES"); //$NON-NLS-1$
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
    } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException e) {
        throw new RuntimeException(e);
    }
    try {
        encrypted = cipher.doFinal(plainText.getBytes());
    } catch (IllegalBlockSizeException | BadPaddingException e) {
        throw new RuntimeException(e);
    }
    return "$CRYPT::" + new String(Base64.encodeBase64(encrypted)); //$NON-NLS-1$
}

---

From source file:de.fhdo.helper.DES.java

public static String decrypt(String Text) {
    try {//from w  ww .  j  av a  2s  .c o m
        DESKeySpec keySpec = new DESKeySpec("schluessel_stdrepository15".getBytes("UTF8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(keySpec);

        byte[] encrypedPwdBytes = Base64.decodeBase64(Text);
        Cipher cipher = Cipher.getInstance("DES");// cipher is not thread safe
        cipher.init(Cipher.DECRYPT_MODE, key);

        byte[] plainTextPwdBytes = (cipher.doFinal(encrypedPwdBytes));

        return new String(plainTextPwdBytes);

    } catch (Exception e) {
        e.printStackTrace();
    }

    return "";
}

---

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