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.liferay.util.Encryptor.java

public static String decrypt(Key key, String encryptedString) throws EncryptorException {

    try {// w ww .  jav a 2s  .co  m
        Security.addProvider(getProvider());

        Cipher cipher = Cipher.getInstance(key.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, key);

        byte[] encryptedBytes = Base64.decode(encryptedString);
        byte[] decryptedBytes = cipher.doFinal(encryptedBytes);

        String decryptedString = new String(decryptedBytes, ENCODING);

        return decryptedString;
    } catch (Exception e) {
        throw new EncryptorException(e);
    }
}

From source file:com.amazonaws.cognito.devauthsample.AESEncryption.java

private static byte[] encrypt(String clearText, String key, byte[] iv) {
    try {// w ww  .  j  av a 2s .co  m
        Cipher cipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
        AlgorithmParameters params = AlgorithmParameters.getInstance("AES");
        params.init(new IvParameterSpec(iv));
        cipher.init(Cipher.ENCRYPT_MODE, getKey(key), params);
        return cipher.doFinal(clearText.getBytes());
    } catch (GeneralSecurityException e) {
        throw new RuntimeException("Failed to encrypt.", e);
    }
}

From source file:com.amazonaws.cognito.devauthsample.AESEncryption.java

private static byte[] decrypt(byte[] cipherBytes, String key, byte[] iv) {
    try {//from  w  w w .ja  va 2s . c om
        Cipher cipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
        AlgorithmParameters params = AlgorithmParameters.getInstance("AES");
        params.init(new IvParameterSpec(iv));
        cipher.init(Cipher.DECRYPT_MODE, getKey(key), params);
        return cipher.doFinal(cipherBytes);
    } catch (GeneralSecurityException e) {
        throw new RuntimeException("Failed to decrypt.", e);
    }
}

From source file:com.github.aynu.mosir.core.standard.util.SecurityHelper.java

/**
 * ????/*from ww  w.  jav  a 2 s  .  co m*/
 * <dl>
 * <dt>?
 * <dd>RSA/ECB/PKCS1Padding???????
 * </dl>
 * @param key ?
 * @param input 
 * @return ?
 */
public static byte[] encrypt(final Key key, final byte[] input) {
    try {
        final Cipher cipher = Cipher.getInstance(ALGO_CIPHER_SMALL);
        cipher.init(Cipher.ENCRYPT_MODE, key);
        return cipher.doFinal(input);
    } catch (final NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException
            | IllegalBlockSizeException | BadPaddingException e) {
        throw new StandardRuntimeException(e);
    }
}

From source file:com.github.aynu.mosir.core.standard.util.SecurityHelper.java

/**
 * ????/*from   w  ww  .  j a va2 s.co  m*/
 * <dl>
 * <dt>?
 * <dd>RSA/ECB/PKCS1Padding???????
 * </dl>
 * @param key ?
 * @param input 
 * @return ?
 */
public static byte[] decrypt(final Key key, final byte[] input) {
    try {
        final Cipher cipher = Cipher.getInstance(ALGO_CIPHER_SMALL);
        cipher.init(Cipher.DECRYPT_MODE, key);
        return cipher.doFinal(input);
    } catch (final NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException
            | IllegalBlockSizeException | BadPaddingException e) {
        throw new StandardRuntimeException(e);
    }
}

From source file:com.github.aynu.mosir.core.standard.util.SecurityHelper.java

/**
 * ???//w  ww  .j ava  2 s . com
 * <dl>
 * <dt>?
 * <dd>AES/CBC/PKCS5Padding???????
 * </dl>
 * @param key ?
 * @param iv ?
 * @param input 
 * @return ?
 */
public static byte[] encrypt(final Key key, final IvParameterSpec iv, final byte[] input) {
    try {
        final Cipher cipher = Cipher.getInstance(ALGO_CIPHER_BIG);
        cipher.init(Cipher.ENCRYPT_MODE, key, iv);
        return cipher.doFinal(input);
    } catch (final NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException
            | IllegalBlockSizeException | BadPaddingException | InvalidAlgorithmParameterException e) {
        throw new StandardRuntimeException(e);
    }
}

From source file:com.github.aynu.mosir.core.standard.util.SecurityHelper.java

/**
 * ???/* w  w  w  .j  av a  2 s.c  o  m*/
 * <dl>
 * <dt>?
 * <dd>AES/CBC/PKCS5Padding???????
 * </dl>
 * @param key ?
 * @param iv ?
 * @param input 
 * @return ?
 */
public static byte[] decrypt(final Key key, final IvParameterSpec iv, final byte[] input) {
    try {
        final Cipher cipher = Cipher.getInstance(ALGO_CIPHER_BIG);
        cipher.init(Cipher.DECRYPT_MODE, key, iv);
        return cipher.doFinal(input);
    } catch (final NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException
            | IllegalBlockSizeException | BadPaddingException | InvalidAlgorithmParameterException e) {
        throw new StandardRuntimeException(e);
    }
}

From source file:Controller.StringEncrypt.java

public final static String encrypt(String cleartext) {
    byte[] encrypted = null;
    try {//  ww  w  .j  a  v a 2 s . c  o m
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        SecretKeySpec skeySpec = new SecretKeySpec("92AE31A79FEEB2A3".getBytes(), "AES");
        IvParameterSpec ivParameterSpec = new IvParameterSpec("0123456789ABCDEF".getBytes());
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivParameterSpec);
        encrypted = cipher.doFinal(cleartext.getBytes());
    } catch (InvalidAlgorithmParameterException | InvalidKeyException | NoSuchAlgorithmException
            | BadPaddingException | IllegalBlockSizeException | NoSuchPaddingException e) {
        JOptionPane.showMessageDialog(null, "Error encriptando contrasea");
    }
    return new String(encodeBase64(encrypted));
}

From source file:cloudeventbus.pki.CertificateUtils.java

public static void validateSignature(PublicKey key, byte[] challenge, byte[] salt, byte[] signature) {
    try {// www.ja v a 2 s.  co  m
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.DECRYPT_MODE, key);
        final byte[] decryptedSignature = cipher.doFinal(signature);
        if (decryptedSignature.length != challenge.length + salt.length) {
            throw new InvalidSignatureException("Signature doesn't match challenge");
        }
        for (int i = 0; i < challenge.length; i++) {
            if (decryptedSignature[i] != challenge[i]) {
                throw new InvalidSignatureException("Signature doesn't match challenge");
            }
        }
        for (int i = 0; i < salt.length; i++) {
            if (decryptedSignature[challenge.length + i] != salt[i]) {
                throw new InvalidSignatureException("Signature doesn't match challenge");
            }
        }
    } catch (GeneralSecurityException e) {
        throw new CertificateSecurityException(e);
    }
}

From source file:com.app.utils.StringEncrypt.java

/**
 * Funcin de tipo String que recibe una llave (key), un vector de inicializacin (iv)
 * y el texto que se desea descifrar/*from   w ww . ja v a2s  .  c  o  m*/
 * @param key la llave en tipo String a utilizar
 * @param iv el vector de inicializacin a utilizar
 * @param encrypted el texto cifrado en modo String
 * @return el texto desencriptado en modo String
 * @throws Exception puede devolver excepciones de los siguientes tipos: NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException
 */
public static String decrypt(String key, String iv, String encrypted) throws Exception {
    Cipher cipher = Cipher.getInstance(cI);
    SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), alg);
    IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes());
    byte[] enc = decodeBase64(encrypted);
    cipher.init(Cipher.DECRYPT_MODE, skeySpec, ivParameterSpec);
    byte[] decrypted = cipher.doFinal(enc);
    return new String(decrypted);
}