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:io.manasobi.utils.CryptoUtils.java

/**
 *  .//from   ww  w . ja v a2 s.  co m
 *
 * @param keyHex generateHexKey ? ? ?? Hex ? ? 
 * @param data    ?? byte 
 * 
 * @return  ? ??
 */
public static byte[] encryptByDES(String keyHex, byte[] data) {

    SecretKey key = getSecretDESKeyFromHex(keyHex);

    byte[] encryptedData = null;

    try {

        Cipher cipher = Cipher.getInstance(ALGORITHM);

        cipher.init(Cipher.ENCRYPT_MODE, key);

        encryptedData = cipher.doFinal(data);

    } catch (Exception e) {

        throw new CryptoUtilsException(e.getMessage());
    }

    return encryptedData;
}

From source file:io.manasobi.utils.CryptoUtils.java

/**
 *  .//from w  w w.  ja  v a2s.co  m
 *
 * @param keyHex generateHexKey ? ? ?? Hex ? ? 
 * @param data    ? ?
 *             
 * @return ? ?? byte 
 */
public static byte[] decryptByDES(String keyHex, byte[] data) {

    SecretKey key = getSecretDESKeyFromHex(keyHex);

    byte[] decryptedData = null;

    try {

        Cipher cipher = Cipher.getInstance(ALGORITHM);

        cipher.init(Cipher.DECRYPT_MODE, key);

        decryptedData = cipher.doFinal(data);

    } catch (Exception e) {

        throw new CryptoUtilsException(e.getMessage());
    }

    return decryptedData;
}

From source file:com.os.util.PasswordDecoderEncoder.java

public static String encrypt(String plainPassword) throws Exception {
    Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
    key = convertHexToBytes(keyst);//from   w  w w  . j  ava 2 s.com
    final SecretKeySpec secretKey = new SecretKeySpec(key, "AES");
    cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    final String encryptedString = Base64.encodeBase64String(cipher.doFinal(plainPassword.getBytes("UTF8")));
    System.out.println(encryptedString);
    String passwordEncrypted = encryptedString.trim();

    return passwordEncrypted;

}

From source file:com.cherong.mock.common.base.util.EncryptionUtil.java

/**
 * DES bytKey8?//from ww  w .j a  v a2s.  co m
 * 
 * @param bytP
 * @param bytKey
 * @return
 * @throws Exception
 */
public static byte[] encryptByDES(byte[] bytP, byte[] bytKey) throws Exception {
    DESKeySpec dks = new DESKeySpec(bytKey);
    SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");
    SecretKey sk = skf.generateSecret(dks);
    Cipher cip = Cipher.getInstance(DES_CIPHER_ALGORITHM);
    cip.init(Cipher.ENCRYPT_MODE, sk);
    return cip.doFinal(bytP);
}

From source file:com.cherong.mock.common.base.util.EncryptionUtil.java

/**
 * DES bytKey8?//from   w  ww.jav a  2s.co  m
 * 
 * @param bytE
 * @param bytKey
 * @return
 * @throws Exception
 */
public static byte[] decryptByDES(byte[] bytE, byte[] bytKey) throws Exception {
    DESKeySpec desKS = new DESKeySpec(bytKey);
    SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");
    SecretKey sk = skf.generateSecret(desKS);
    Cipher cip = Cipher.getInstance(DES_CIPHER_ALGORITHM);
    cip.init(Cipher.DECRYPT_MODE, sk);
    return cip.doFinal(bytE);
}

From source file:com.example.license.DESUtil.java

/**
 * ?//from ww w.j  a va 2  s  .  c o  m
 * 
 * @param data
 *            ?
 * @param key
 *            
 * @return ??
 */
public static String encrypt(String data, String key) throws Exception {
    Key deskey = keyGenerator(key);
    // Cipher??
    Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
    SecureRandom random = new SecureRandom();
    // ?Cipher?
    cipher.init(Cipher.ENCRYPT_MODE, deskey, random);
    byte[] results = cipher.doFinal(data.getBytes("UTF-8"));
    // http://tripledes.online-domain-tools.com/??
    for (int i = 0; i < results.length; i++) {
        System.out.print(results[i] + " ");
    }
    System.out.println();
    // ??Base64?
    return Base64.encodeBase64String(results);
}

From source file:Logic.security.java

public static String symmetricEncrypt(String text, String secretKey) {
    byte[] raw;/*from w ww. j  av  a2 s .c o m*/
    String encryptedString;
    SecretKeySpec skeySpec;
    byte[] encryptText = text.getBytes();
    Cipher cipher;
    try {
        raw = Base64.decodeBase64(secretKey);
        skeySpec = new SecretKeySpec(raw, "AES");
        cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        encryptedString = Base64.encodeBase64String(cipher.doFinal(encryptText));
    } catch (Exception e) {
        e.printStackTrace();
        return "Error";
    }
    return encryptedString;
}

From source file:com.ec2box.manage.util.EncryptionUtil.java

/**
 * return decrypted value of encrypted string
 *
 * @param str encrypted string/*from  w  ww  . j a  v a2s  .  c  o m*/
 * @return decrypted string
 */
public static String decrypt(String str) {
    String retVal = null;
    if (str != null && str.length() > 0) {
        try {
            Cipher c = Cipher.getInstance("AES");
            c.init(Cipher.DECRYPT_MODE, new SecretKeySpec(key, "AES"));
            byte[] decodedVal = Base64.decodeBase64(str.getBytes());
            retVal = new String(c.doFinal(decodedVal));
        } catch (Exception ex) {
            log.error(ex.toString(), ex);
        }

    }
    return retVal;
}

From source file:Main.java

public static String encryptData(String password, String plaintextData) throws Exception {
    // Thank you Mr. Nelenkov
    String maybeThisHelps = "http://nelenkov.blogspot.com/2012/04/using-password-based-encryption-on.html";
    Log.v(TAG, maybeThisHelps);//from   w  w w . ja va2 s .  c o m
    int iterationCount = 100; //because Polaroid
    int keyLength = 256;
    int saltLength = keyLength;

    SecureRandom random = new SecureRandom();
    byte[] salt = new byte[saltLength];
    random.nextBytes(salt);
    KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, iterationCount, keyLength);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
    byte[] keyBytes = keyFactory.generateSecret(keySpec).getEncoded();
    SecretKey key = new SecretKeySpec(keyBytes, "AES");

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    byte[] iv = new byte[cipher.getBlockSize()];
    random.nextBytes(iv);

    IvParameterSpec ivParams = new IvParameterSpec(iv);
    cipher.init(Cipher.ENCRYPT_MODE, key, ivParams);
    byte[] ciphertext = cipher.doFinal(plaintextData.getBytes("UTF-8"));

    String ivToString = new String(Base64.encode(iv, 0));
    String saltToString = new String(Base64.encode(salt, 0));
    String ciphertextToString = new String(Base64.encode(ciphertext, 0));

    Log.d(TAG, ivToString + "]" + saltToString + "]" + ciphertextToString);
    return (ivToString + "]" + saltToString + "]" + ciphertextToString).replace("\n", "");
}

From source file:com.servoy.j2db.util.SecuritySupport.java

@SuppressWarnings("nls")
public static String encryptUrlSafe(Settings settings, String value) throws Exception {
    if (value == null)
        return value;
    Cipher cipher = Cipher.getInstance("DESede");
    cipher.init(Cipher.ENCRYPT_MODE, SecuritySupport.getCryptKey(settings));
    return Base64.encodeBase64URLSafeString(cipher.doFinal(value.getBytes()));
}