Example usage for javax.crypto Cipher doFinal

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:Main.java

private static byte[] doFinal(String key, int opmode, byte[] input)
        throws InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException,
        IllegalBlockSizeException, BadPaddingException {
    key = checkNull(key) ? DEFAULT_KEY : key;
    if (checkNull(key)) {
        return null;
    }/* ww  w  .j  a va2 s  . com*/
    SecureRandom sr = new SecureRandom();
    DESKeySpec dks = new DESKeySpec(key.getBytes());
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
    SecretKey securekey = keyFactory.generateSecret(dks);
    Cipher cipher = Cipher.getInstance(MODE);
    cipher.init(opmode, securekey, sr);
    return cipher.doFinal(input);
}

From source file:Main.java

private static byte[] encryptWithPassphrase(byte[] encryptionSalt, int iterations, byte[] data,
        String passphrase) throws GeneralSecurityException {
    Cipher cipher = getCipherFromPassphrase(passphrase, encryptionSalt, iterations, Cipher.ENCRYPT_MODE);
    return cipher.doFinal(data);
}

From source file:Main.java

/**
 * Decrypt data/*from w  w  w  .j ava 2  s.c  o  m*/
 * @param secretKey -   a secret key used for decryption
 * @param data      -   data to decrypt
 * @return   Decrypted data
 * @throws Exception
 */
public static String decipher(String secretKey, String data) throws Exception {
    // Key has to be of length 8
    if (secretKey == null || secretKey.length() != 8)
        throw new Exception("Invalid key length - 8 bytes key needed!");

    SecretKey key = new SecretKeySpec(secretKey.getBytes(), ALGORITHM);
    Cipher cipher = Cipher.getInstance(ALGORITHM);
    cipher.init(Cipher.DECRYPT_MODE, key);

    return new String(cipher.doFinal(toByte(data)));
}

From source file:com.searchbox.utils.DecryptLicense.java

public static byte[] decrypt(byte[] inpBytes) throws Exception {

    byte[] pkbytes = Base64.decodeBase64(privkey);
    KeyFactory keyFactory = KeyFactory.getInstance(algorithm);
    PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(pkbytes);
    PrivateKey pk = keyFactory.generatePrivate(privateKeySpec);

    Cipher cipher = Cipher.getInstance(xform);
    cipher.init(Cipher.DECRYPT_MODE, pk);
    return cipher.doFinal(inpBytes);
}

From source file:Main.java

private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {
    SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
    return cipher.doFinal(clear);
}

From source file:Main.java

private static byte[] decryptWithPassphrase(byte[] encryptionSalt, int iterations, byte[] data,
        String passphrase) throws GeneralSecurityException, IOException {
    Cipher cipher = getCipherFromPassphrase(passphrase, encryptionSalt, iterations, Cipher.DECRYPT_MODE);
    return cipher.doFinal(data);
}

From source file:Main.java

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

From source file:Main.java

public static byte[] decrypt(byte[] ivBytes, byte[] keyBytes, byte[] textBytes) {
    try {//from www. ja  v a  2 s.c om
        AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivBytes);
        SecretKeySpec newKey = new SecretKeySpec(keyBytes, "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, newKey, ivSpec);
        return cipher.doFinal(textBytes);
    } catch (Exception e) {
        return errorbyte;
    }
}

From source file:com.doculibre.constellio.utils.aes.SimpleProtector.java

public static String encrypt(String valueToEnc) throws Exception {
    Key key = generateKey();//from www. j a  v a  2 s  .  c o m
    Cipher c = Cipher.getInstance(ALGORITHM);
    c.init(Cipher.ENCRYPT_MODE, key);
    byte[] encValue = c.doFinal(valueToEnc.getBytes());
    String encryptedValue = Base64.encodeBase64String(encValue);
    return encryptedValue;
}

From source file:Main.java

public static byte[] encrypt(byte[] ivBytes, byte[] keyBytes, byte[] textBytes) {
    try {/*from  ww w  . j a  v a  2 s.c o m*/
        AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivBytes);
        SecretKeySpec newKey = new SecretKeySpec(keyBytes, "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, newKey, ivSpec);
        return cipher.doFinal(textBytes);
    } catch (Exception e) {
        Log.e(TAG, "Error during encryption: " + e.toString());
        return errorbyte;
    }
}