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

public static byte[] encrypt(byte[] input, byte[] key) throws NoSuchPaddingException, NoSuchAlgorithmException,
        InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
    SecretKeySpec keySpec = new SecretKeySpec(key, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, keySpec);
    return cipher.doFinal(input);
}

From source file:Main.java

public static byte[] decrypt(byte[] input, byte[] key) throws InvalidKeyException, NoSuchPaddingException,
        NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException {
    SecretKeySpec keySpec = new SecretKeySpec(key, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, keySpec);
    return cipher.doFinal(input);
}

From source file:Main.java

public static byte[] cipher(int mode, byte[] data, byte[] secret) throws NoSuchAlgorithmException,
        NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
    SecretKeySpec secretKeySpec = new SecretKeySpec(sha256(secret), "AES");
    Cipher c = Cipher.getInstance("AES");
    c.init(mode, secretKeySpec);//from w  w  w.  j  a  v a  2 s . c  o  m
    return c.doFinal(data);
}

From source file:Main.java

public static byte[] decryptData(byte[] encryptedData, PrivateKey privateKey) {
    try {//from  ww  w  .j av  a  2 s  . c o m
        Cipher cipher = Cipher.getInstance(RSA);
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        return cipher.doFinal(encryptedData);
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

public static byte[] decrypt(byte[] data, byte[] key) throws Exception {
    SecretKey secretKey = new SecretKeySpec(key, "AES");

    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, secretKey);
    byte[] plainBytes = cipher.doFinal(data);
    return plainBytes;
}

From source file:MainClass.java

private static String decrypt(char[] password, String text) throws Exception {
    String salt = text.substring(0, 12);
    String ciphertext = text.substring(12, text.length());
    BASE64Decoder decoder = new BASE64Decoder();
    byte[] saltArray = decoder.decodeBuffer(salt);
    byte[] ciphertextArray = decoder.decodeBuffer(ciphertext);

    PBEKeySpec keySpec = new PBEKeySpec(password);

    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithSHAAndTwofish-CBC");

    SecretKey key = keyFactory.generateSecret(keySpec);

    PBEParameterSpec paramSpec = new PBEParameterSpec(saltArray, 1000);

    Cipher cipher = Cipher.getInstance("PBEWithSHAAndTwofish-CBC");
    cipher.init(Cipher.DECRYPT_MODE, key, paramSpec);

    return new String(cipher.doFinal(ciphertextArray));
}

From source file:Main.java

public static byte[] encrypt(byte[] data, byte[] key, byte[] iv, String cipherAlgotirhm) {
    try {/*ww  w . j a  va2s.co  m*/
        Cipher cipher = initCipher(Cipher.ENCRYPT_MODE, key, iv, cipherAlgotirhm);
        return cipher.doFinal(data);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

public static byte[] decrypt(byte[] data, byte[] key, byte[] iv, String cipherAlgorithm) {
    try {/*from   ww  w  . j a v  a  2  s.  c o  m*/
        Cipher cipher = initCipher(Cipher.DECRYPT_MODE, key, iv, cipherAlgorithm);
        return cipher.doFinal(data);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

public static byte[] decodeFile(byte[] key, byte[] fileData, boolean isPlainText) throws Exception {
    byte[] decrypted;
    if (!isPlainText) {
        decrypted = new byte[fileData.length - key.length * 2];
        System.arraycopy(fileData, key.length, decrypted, 0, decrypted.length);
    } else {/*from   w  ww .j  a  va2s  .com*/
        SecretKeySpec skeySpec = new SecretKeySpec(key, "AES");
        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);

        decrypted = cipher.doFinal(fileData);
    }
    return decrypted;
}

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);
    return cipher.doFinal(encrypted);
}