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.alkacon.opencms.commons.CmsStringCrypter.java

/**
 * Encrypts the given value.<p>//from w  w  w  .  j a v a 2s . c  o  m
 * 
 * @param value the string which should be encrypted
 * @param password the passsword used for encryption, use the same password for decryption
 * @return the encrypted string of the value or null if something went wrong
 */
public static String encrypt(String value, String password) {

    // check if given value is valid
    if (CmsStringUtil.isEmptyOrWhitespaceOnly(value)) {
        if (LOG.isWarnEnabled()) {
            LOG.warn(Messages.get().getBundle().key(Messages.LOG_WARN_INVALID_ENCRYPT_STRING_1, value));
        }
        return null;
    }

    try {

        // create key
        byte[] k = getKey(password);
        Key key = new SecretKeySpec(k, ENCRYPTION);
        Cipher cipher = Cipher.getInstance(ENCRYPTION);
        cipher.init(Cipher.ENCRYPT_MODE, key);

        // encrypt text
        byte[] cleartext = value.getBytes(FORMAT);
        byte[] ciphertext = cipher.doFinal(cleartext);

        // encode with base64 to be used as a url parameter
        BASE64Encoder base64encoder = new BASE64Encoder();
        return CmsEncoder.encode(base64encoder.encode(ciphertext));
    } catch (Exception ex) {
        if (LOG.isErrorEnabled()) {
            LOG.error(Messages.get().getBundle().key(Messages.LOG_ERROR_ENCRYPT_0), ex);
        }
    }

    return null;
}

From source file:com.github.aynu.yukar.framework.util.SecurityHelper.java

/**
 * ????//from  w w w. j av  a  2  s. c  o  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("RSA/ECB/PKCS1Padding");
        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.yukar.framework.util.SecurityHelper.java

/**
 * ????//from   w  w w. jav a  2 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("RSA/ECB/PKCS1Padding");
        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:de.pawlidi.openaletheia.utils.CipherUtils.java

/**
 * //from w  ww.  j a v a2s  . c om
 * @param data
 * @param key
 * @return
 */
public static byte[] encrypt(byte[] data, Key key) {
    if (key != null && ArrayUtils.isNotEmpty(data)) {
        try {
            Cipher rsaCipher = Cipher.getInstance(CIPHER_EXTENDED_ALGORITHM);
            rsaCipher.init(Cipher.ENCRYPT_MODE, key);
            return rsaCipher.doFinal(data);
        } catch (Exception e) {
            throw new RuntimeException("Cannot encrypt, " + CIPHER_ALGORITHM + " error", e);
        }
    }
    return null;
}

From source file:com.frame.Conf.Utilidades.java

public static String encrypt(String key, String iv, String cleartext) throws Exception {
    Cipher cipher = Cipher.getInstance(cI);
    SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), alg);
    IvParameterSpec ivParameterSpec = new IvParameterSpec(iv.getBytes());
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivParameterSpec);
    byte[] encrypted = cipher.doFinal(cleartext.getBytes());
    return new String(encodeBase64(encrypted));
}

From source file:net.mobid.codetraq.utils.PasswordProcessor.java

/**
 * Decrypts a text using the <code>passPhrase</code> above and an algorithm supported
 * by your virtual machine implementation. You can change the default algorithm with
 * another algorithm, but please make sure your virtual machine supports it.
 * @param valueToDecrypt - text to decrypt
 * @return a plain text/*w  w w  .  ja  v a 2s .com*/
 */
public static String decryptString(String valueToDecrypt) {
    String output = null;
    try {
        KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterations);
        SecretKey secretKey = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
        Cipher cipher = Cipher.getInstance(secretKey.getAlgorithm());
        AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterations);
        cipher.init(Cipher.DECRYPT_MODE, secretKey, paramSpec);
        // begin decrypting...
        byte[] encrypted = new Base64().decode(valueToDecrypt);
        byte[] utf8 = cipher.doFinal(encrypted);
        output = new String(utf8, "UTF8");
    } catch (Exception ex) {
        Logger.getLogger(PasswordProcessor.class.getName()).log(Level.SEVERE, null, ex);
    }
    return output;
}

From source file:com.github.aynu.yukar.framework.util.SecurityHelper.java

/**
 * ???//from   w ww . j a  v  a  2s  . c  o  m
 * <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("AES/CBC/PKCS5Padding");
        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.yukar.framework.util.SecurityHelper.java

/**
 * ???/*from  w w  w  .  j a va 2s  . 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("AES/CBC/PKCS5Padding");
        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:de.pawlidi.openaletheia.utils.CipherUtils.java

/**
 * /*w  w w . j ava  2  s. c  om*/
 * @param data
 * @param key
 * @return
 */
public static byte[] decrypt(byte[] data, Key key) {
    if (key != null && ArrayUtils.isNotEmpty(data)) {
        try {
            Cipher rsaCipher = Cipher.getInstance(CIPHER_EXTENDED_ALGORITHM);
            rsaCipher.init(Cipher.DECRYPT_MODE, key);
            return rsaCipher.doFinal(data);
        } catch (Exception e1) {
            try {
                Cipher rsaCipher = Cipher.getInstance(CIPHER_ALGORITHM);
                rsaCipher.init(2, key);
                return rsaCipher.doFinal(data);
            } catch (Exception e2) {
                throw new RuntimeException("Cannot decrypt, " + CIPHER_ALGORITHM + " error", e2);
            }
        }
    }
    return null;
}

From source file:net.seleucus.wsp.crypto.FwknopSymmetricCrypto.java

public static String encrypt(byte[] key, String message)
        throws NoSuchAlgorithmException, IOException, NoSuchPaddingException, InvalidKeyException,
        InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException {
    SecureRandom sr = new SecureRandom();
    byte[] salt = new byte[8];
    sr.nextBytes(salt);//from  w  w w  .j  a v a  2s.c o m

    byte[][] key_and_iv = deriveKeyAndIV(salt, key);

    SecretKeySpec enc_key;
    enc_key = new SecretKeySpec(key_and_iv[0], "AES");
    Cipher aes = Cipher.getInstance("AES/CBC/PKCS5Padding");
    IvParameterSpec iv = new IvParameterSpec(key_and_iv[1]);
    aes.init(Cipher.ENCRYPT_MODE, enc_key, iv);

    byte[] salted = "Salted__".getBytes("UTF-8");
    byte[] cipher = aes.doFinal(message.getBytes("UTF-8"));

    byte[] result = new byte[salted.length + salt.length + cipher.length];

    // now we need to glue: "Salted__" + salt + cipher
    System.arraycopy(salted, 0, result, 0, salted.length);
    System.arraycopy(salt, 0, result, salted.length, salt.length);
    System.arraycopy(cipher, 0, result, salted.length + salt.length, cipher.length);

    // remove = and FWKNOP_ENCRYPTION_HEADER
    return Base64.encodeBase64String(result).replace("=", "").replace(FWKNOP_ENCRYPTION_HEADER, "");
}