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.sync.engine.util.Encryptor.java

public static String encrypt(String value) throws Exception {
    if (value == null) {
        return "";
    }//from  w w w.ja  va  2s  .com

    SecretKey secretKey = new SecretKeySpec(_PASSWORD, _ALGORITHM);

    Cipher cipher = Cipher.getInstance(_ALGORITHM);

    cipher.init(Cipher.ENCRYPT_MODE, secretKey);

    String salt = getSalt();

    String encryptedValue = value;

    for (int i = 0; i < _ITERATIONS; i++) {
        encryptedValue = salt.concat(encryptedValue);

        byte[] encryptedBytes = cipher.doFinal(encryptedValue.getBytes(_UTF8_CHARSET));

        encryptedValue = Base64.encodeBase64String(encryptedBytes);
    }

    return encryptedValue;
}

From source file:com.salesmanager.core.util.EncryptionUtil.java

public static String decryptFromExternal(String key, String value) throws Exception {

    if (value == null || value.equals(""))
        return "";

    Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
    SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");
    IvParameterSpec ivSpec = new IvParameterSpec("fedcba9876543210".getBytes());
    cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
    byte[] outText;
    outText = cipher.doFinal(hexToBytes(value));
    return new String(outText);

}

From source file:com.myapp.common.AES4MEncrypt.java

/**
 * //  w  w w  .  j  a  v  a 2s .  co  m
 * 
 * @param sSrc 
 * @param sKey KEY
 * @return
 * @throws Exception
 * @author cdduqiang
 * @date 201443
 */
public static String encrypt(String sSrc, String sKey) throws Exception {
    if (sKey == null) {
        log.error("Encrypt Key ??");
        throw new Exception("Encrypt Key ??");
    }

    byte[] raw = hex2byte(sKey);
    SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    IvParameterSpec iv = new IvParameterSpec("0102030405060708".getBytes());
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
    byte[] anslBytes = sSrc.getBytes(ENCODING);// string2AnslBytes(sSrc);
    byte[] encrypted = cipher.doFinal(anslBytes);
    return byte2hex(encrypted).toUpperCase();
}

From source file:com.clustercontrol.util.KeyCheck.java

private static byte[] decrypt(byte[] source, PublicKey publicKey) throws HinemosUnknown {
    m_log.trace("decrypt=" + source.length);
    try {//from  w ww.j  a  va  2  s . c  o m
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, publicKey);
        return cipher.doFinal(source);
    } catch (IllegalBlockSizeException ex) {
        m_log.warn(ex.getMessage(), ex);
    } catch (BadPaddingException ex) {
        m_log.warn(ex.getMessage(), ex);
    } catch (InvalidKeyException ex) {
        m_log.warn(ex.getMessage(), ex);
    } catch (NoSuchAlgorithmException ex) {
        m_log.warn(ex.getMessage(), ex);
    } catch (NoSuchPaddingException ex) {
        m_log.warn(ex.getMessage(), ex);
    }
    throw new HinemosUnknown("decrypt error");
}

From source file:com.clustercontrol.util.KeyCheck.java

private static byte[] encrypt(byte[] source, PrivateKey privateKey) throws HinemosUnknown {
    try {/*from  w  w w  . j  ava 2  s. com*/
        Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.ENCRYPT_MODE, privateKey);
        return cipher.doFinal(source);
    } catch (IllegalBlockSizeException ex) {
        m_log.warn(ex.getMessage(), ex);
    } catch (BadPaddingException ex) {
        m_log.warn(ex.getMessage(), ex);
    } catch (InvalidKeyException ex) {
        m_log.warn(ex.getMessage(), ex);
    } catch (NoSuchAlgorithmException ex) {
        m_log.warn(ex.getMessage(), ex);
    } catch (NoSuchPaddingException ex) {
        m_log.warn(ex.getMessage(), ex);
    }
    throw new HinemosUnknown("encrypt error");
}

From source file:com.salesmanager.core.util.EncryptionUtil.java

public static String decrypt(String key, String value) throws Exception {

    if (value == null || value.equals(""))
        return "";

    // NEED TO UNDERSTAND WHY PKCS5Padding DOES NOT WORK
    // Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");
    IvParameterSpec ivSpec = new IvParameterSpec("fedcba9876543210".getBytes());
    cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
    byte[] outText;
    outText = cipher.doFinal(hexToBytes(value));
    return new String(outText);

}

From source file:com.cloudant.sync.datastore.encryption.DPKEncryptionUtil.java

/**
 * AES Encrypt a byte array//www .j  a v a 2s.  c o m
 *
 * @param key              The encryption key
 * @param iv               The iv
 * @param unencryptedBytes The data to encrypt
 * @return The encrypted data
 * @throws NoSuchPaddingException
 * @throws NoSuchAlgorithmException
 * @throws InvalidAlgorithmParameterException
 * @throws InvalidKeyException
 * @throws BadPaddingException
 * @throws IllegalBlockSizeException
 */
public static byte[] encryptAES(SecretKey key, byte[] iv, byte[] unencryptedBytes)
        throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException,
        InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
    Cipher aesCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    IvParameterSpec ivParameter = new IvParameterSpec(iv);
    // see http://stackoverflow.com/a/11506343
    Key encryptionKey = new SecretKeySpec(key.getEncoded(), "AES");
    aesCipher.init(Cipher.ENCRYPT_MODE, encryptionKey, ivParameter);
    return aesCipher.doFinal(unencryptedBytes);
}

From source file:com.cloudant.sync.datastore.encryption.DPKEncryptionUtil.java

/**
 * Decrypt an AES encrypted byte array//from  ww w. j  a  v  a2s  .c o m
 *
 * @param key            The encryption key
 * @param iv             The iv
 * @param encryptedBytes The data to decrypt
 * @return The decrypted data
 * @throws NoSuchPaddingException
 * @throws NoSuchAlgorithmException
 * @throws InvalidAlgorithmParameterException
 * @throws InvalidKeyException
 * @throws BadPaddingException
 * @throws IllegalBlockSizeException
 */
public static byte[] decryptAES(SecretKey key, byte[] iv, byte[] encryptedBytes)
        throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException,
        InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
    Cipher aesCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    IvParameterSpec ivParameter = new IvParameterSpec(iv);
    // see http://stackoverflow.com/a/11506343
    Key encryptionKey = new SecretKeySpec(key.getEncoded(), "AES");
    aesCipher.init(Cipher.DECRYPT_MODE, encryptionKey, ivParameter);
    return aesCipher.doFinal(encryptedBytes);
}

From source file:com.screenslicer.common.Crypto.java

private static String decodeHelper(String cipherText, String encryptionKey) {
    if (cipherText == null || encryptionKey == null) {
        return null;
    }//w w w .  ja v  a 2 s.  c o m
    try {
        Cipher aesCipher = Cipher.getInstance("AES");
        aesCipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(DigestUtils.sha256(encryptionKey), "AES"),
                aesCipher.getParameters());
        return new String(aesCipher.doFinal(Base64.decodeBase64(cipherText)), "utf-8");
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

private static String des(String id, String key) throws NoSuchPaddingException, NoSuchAlgorithmException,
        InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
    int index = 0;
    SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(), "DES");
    Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
    cipher.init(1, secretKeySpec);//from w  w w. j  av  a2s .  c o  m
    int i = id.length();
    if (i < 8) {
        i = 8 - i;
    } else {
        i %= 8;
        i = i != 0 ? 8 - i : 0;
    }
    while (index < i) {
        id = String.valueOf(id) + "\u0000";
        index++;
    }
    return a(cipher.doFinal(id.getBytes()));
}