Example usage for javax.crypto Cipher doFinal

List of usage examples for javax.crypto Cipher doFinal

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Introduction

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

Prototype

public final byte[] doFinal(byte[] input) throws IllegalBlockSizeException, BadPaddingException

Source Link

Document

Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.

Usage

From source file:com.vmware.fdmsecprotomgmt.PasswdEncrypter.java

/**
 * Decrypt the encrypted value with provided key
 *//*from   w w  w  .j  a  va  2s  . c om*/
public static String decrypt(String key, String encryptedValue) {
    String decryptedString = null;
    try {
        IvParameterSpec iv = new IvParameterSpec(INIT_VECTOR.getBytes("UTF-8"));
        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);

        decryptedString = new String(cipher.doFinal(Base64.decodeBase64(encryptedValue)));

    } catch (Exception ex) {
        System.out.println("Caught exception while decrypting string");
        ex.printStackTrace();
    }

    return decryptedString;
}

From source file:com.greenline.hrs.admin.util.encrypt.DESUtil.java

/**
 * Description ?/*from ww  w  .  j a v a2  s . c  o  m*/
 *
 * @param data
 * @param key  byte
 * @return
 * @throws Exception
 */
private static byte[] encrypt(byte[] data, byte[] key) throws GeneralSecurityException {
    // ????
    SecureRandom sr = new SecureRandom();

    // ?DESKeySpec
    DESKeySpec dks = new DESKeySpec(key);

    // ?DESKeySpec??SecretKey
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
    SecretKey securekey = keyFactory.generateSecret(dks);

    // Cipher??
    Cipher cipher = Cipher.getInstance(DES);

    // ?Cipher
    cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);

    return cipher.doFinal(data);

}

From source file:net.fender.crypto.CryptoUtil.java

/**
 * @param keyName/*from ww w  .  j a v  a 2 s .  com*/
 * @param plaintext
 * @return
 * @throws GeneralSecurityException
 */
public static String encryptUsingSystemPropertyKey(String keyName, String plaintext)
        throws GeneralSecurityException {
    Key key = getSystemPropertyKey(keyName);
    Cipher cipher = Cipher.getInstance(key.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, key);
    byte[] encryptedByes = cipher.doFinal(plaintext.getBytes());
    String encrypted = new String(Base64.encodeBase64(encryptedByes));
    return encrypted;
}

From source file:fr.ortolang.diffusion.security.authentication.TicketHelper.java

public static Ticket decodeTicket(String ticket) {
    byte[] encryptedBytes = Base64.decodeBase64(ticket.getBytes());
    try {/*from   w w  w. jav a 2  s  . c  om*/
        Cipher cipher = Cipher.getInstance(ALGORITHM_MODE_PADDING);
        cipher.init(Cipher.DECRYPT_MODE, key);
        byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
        // Extract digest from decryptedBytes (MD5 length is 16 bytes)
        byte[] digest = Arrays.copyOfRange(decryptedBytes, decryptedBytes.length - 16, decryptedBytes.length);
        byte[] serializedMap = Arrays.copyOfRange(decryptedBytes, 0, decryptedBytes.length - 16);
        MessageDigest md = MessageDigest.getInstance(MESSAGE_DIGEST_ALGORITHM);
        if (!Arrays.equals(digest, md.digest(serializedMap))) {
            throw new DigestException();
        }
        ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(serializedMap));
        return (Ticket) ois.readObject();
    } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | BadPaddingException
            | IllegalBlockSizeException | IOException | ClassNotFoundException | DigestException e) {
        LOGGER.log(Level.SEVERE, "Error when decoding ticket: " + e.getMessage());
    }
    return null;
}

From source file:com.netcrest.pado.internal.security.AESCipher.java

private static byte[] decryptBinaryToBinary(byte[] pke, byte[] encrypted) throws Exception {
    SecretKeySpec skeySpec = new SecretKeySpec(pke, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, skeySpec);
    return cipher.doFinal(encrypted);
}

From source file:net.fender.crypto.CryptoUtil.java

/**
 * @param keyName//from   w  w  w . j a  va  2 s . c om
 * @param base64Encoded
 * @return
 * @throws GeneralSecurityException
 */
public static String decryptUsingSystemPropertyKey(String keyName, String base64Encoded)
        throws GeneralSecurityException {
    byte[] encryptedBytes = Base64.decodeBase64(base64Encoded.getBytes());
    Key key = getSystemPropertyKey(keyName);
    Cipher cipher = Cipher.getInstance(key.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, key);
    byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
    String decrypted = new String(decryptedBytes);
    return decrypted;
}

From source file:com.lecaddyfute.utils.security.AESCrypto.java

public static String decrypt1(String encryptedData) throws Exception {
    KeyGenerator keyGen = KeyGenerator.getInstance(ALGO);
    keyGen.init(128);//from w  w  w  .jav  a 2s. c  om
    SecretKey key = keyGen.generateKey();
    Cipher c = Cipher.getInstance(ALGO);

    c.init(Cipher.DECRYPT_MODE, key);
    //        byte[] decordedValue = Base64.decodeBase64(encryptedData.getBytes());
    //        byte[] decValue = c.doFinal(decordedValue);
    byte[] decValue = c.doFinal(encryptedData.getBytes("UTF8"));
    String decryptedValue = new String(decValue);
    return decryptedValue;
}

From source file:com.servoy.j2db.util.SecuritySupport.java

@SuppressWarnings("nls")
public static String decrypt(Settings settings, String value) throws Exception {
    if (value == null)
        return value;
    Cipher cipher = Cipher.getInstance("DESede");
    cipher.init(Cipher.DECRYPT_MODE, SecuritySupport.getCryptKey(settings));
    return new String(cipher.doFinal(Utils.decodeBASE64(value)));
}

From source file:com.sshutils.utils.CryptHelper.java

public static String encrypt(String strToEncrypt) {
    try {//w  ww  .java2s.  c o m

        Cipher cipher = Cipher.getInstance(ENCRYPT_TYPE, "BC");
        final SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        final String encryptedString = Base64.encodeBase64String(cipher.doFinal(strToEncrypt.getBytes()));
        return encryptedString;
    } catch (Exception e) {
        log.error("Error while encrypting", e);
    }
    return null;

}

From source file:de.hybris.platform.b2b.punchout.services.impl.SymmetricManager.java

public static String decrypt(final String encrypted, final String key) throws PunchOutCipherException {
    String decrypted = null;//  ww  w.  j a va 2 s.  c  o m

    try {
        final Key skeySpec = new SecretKeySpec(new Base64().decode(key), ALGORITHM);
        final Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);

        final byte[] decodedValue = new Base64().decode(encrypted.getBytes());
        final byte[] decryptedValue = cipher.doFinal(decodedValue);
        decrypted = new String(decryptedValue);
    } catch (final NoSuchAlgorithmException | NoSuchPaddingException e) {
        // should never happen
        LOG.error("System was unable instantiate Cipher.", e);
    } catch (InvalidKeyException | BadPaddingException | IllegalBlockSizeException e) {
        final String msg = "Error occured during decryption." + e.getMessage();
        LOG.info(msg);
        throw new PunchOutCipherException(msg, e);
    }
    return decrypted;
}