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.redsqirl.workflow.utils.FileStream.java

private static byte[] encrypt(byte[] plaintext) throws Exception {
    SecretKey key = generateKey();
    PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, 42);
    Cipher cipher = Cipher.getInstance("PBEWithMD5AndDES");
    cipher.init(Cipher.ENCRYPT_MODE, key, pbeParamSpec);
    return cipher.doFinal(plaintext);
}

From source file:com.redsqirl.workflow.utils.FileStream.java

private static byte[] decrypt(byte[] ciphertext) throws Exception {
    SecretKey key = generateKey();
    PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, 42);
    Cipher cipher = Cipher.getInstance("PBEWithMD5AndDES");
    cipher.init(Cipher.DECRYPT_MODE, key, pbeParamSpec);
    return cipher.doFinal(ciphertext);
}

From source file:de.scrubstudios.srvmon.agent.classes.Crypt.java

/**
 * This function is used to encrypt the outgoing data.
 * @param key Encryption key/* ww  w.  j a v a 2  s .c  om*/
 * @param data Data which will be encrypted.
 * @return The encrypted data string.
 */
public static String encrypt(String key, String data) {
    byte[] encryptedData = null;
    SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");

    try {
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");

        cipher.init(Cipher.ENCRYPT_MODE, keySpec);
        encryptedData = cipher.doFinal(data.getBytes());

        return new String(Base64.encodeBase64(encryptedData));
    } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | IllegalBlockSizeException
            | BadPaddingException ex) {
        Logger.getLogger(Crypt.class.getName()).log(Level.SEVERE, null, ex);
    }

    return null;
}

From source file:de.scrubstudios.srvmon.agent.classes.Crypt.java

/**
 * This function is used to decrypt incoming data.
 * @param key Encryption key/*from   ww  w.  jav a  2  s.  co  m*/
 * @param data Data string which should be decrypted.
 * @return The decrypted data string.
 */
public static String decrypt(String key, String data) {
    byte[] decryptedData = null;
    SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");

    try {
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");

        cipher.init(Cipher.DECRYPT_MODE, keySpec);
        decryptedData = cipher.doFinal(Base64.decodeBase64(data));

        return new String(decryptedData);
    } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | IllegalBlockSizeException
            | BadPaddingException ex) {
        Logger.getLogger(Crypt.class.getName()).log(Level.SEVERE, null, ex);
    }

    return null;
}

From source file:edu.wright.cs.sp16.ceg3120.util.PasswordEncryptionUtility.java

/**
 * Encrypts a given string using AES.// w ww .  j  a v  a2s .c om
 * 
 * @param value
 *            // String to encrypt.
 * @return // Returns encrypted string.
 */
public static String encrypt(String value) {
    try {
        IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8"));
        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);

        byte[] encrypted = cipher.doFinal(value.getBytes("UTF-8"));
        System.out.println("encrypted string: " + Base64.encodeBase64String(encrypted));

        return Base64.encodeBase64String(encrypted);
    } catch (RuntimeException e) {
        throw e;
    } catch (Exception ex) {
        ex.printStackTrace();
    }

    return null;
}

From source file:com.fpt.crypto.CipherDemo.java

public static String decrypt(String in, String key) throws NoSuchAlgorithmException, NoSuchPaddingException,
        InvalidKeyException, IllegalBlockSizeException, BadPaddingException, DecoderException {
    Cipher cipher = Cipher.getInstance("AES");
    byte[] inputBytes = Hex.decodeHex(in.toCharArray());
    SecretKey secKey = new SecretKeySpec(key.getBytes(), "AES");
    cipher.init(Cipher.DECRYPT_MODE, secKey);
    byte[] outputBytes = cipher.doFinal(inputBytes);
    return new String(outputBytes);

}

From source file:com.thoughtworks.go.server.util.EncryptionHelper.java

public static String decryptUsingRSA(String cipherText, String privateKeyContent)
        throws NoSuchPaddingException, NoSuchAlgorithmException, IOException, InvalidKeySpecException,
        BadPaddingException, IllegalBlockSizeException, InvalidKeyException {
    Cipher decryptCipher = Cipher.getInstance("RSA");
    decryptCipher.init(Cipher.DECRYPT_MODE, getRSAPrivateKeyFrom(privateKeyContent));
    return new String(decryptCipher.doFinal(Base64.getDecoder().decode(cipherText)), UTF_8);
}

From source file:Main.java

public static byte[] encipherAes256(byte[] clearText, String keyString) throws NullPointerException {
    if (keyString == null || keyString.length() == 0) {
        throw new NullPointerException("Please give Password");
    }/*ww w.  ja v  a 2  s. c o  m*/

    if (clearText == null || clearText.length <= 0) {
        throw new NullPointerException("Please give clearText");
    }

    try {
        SecretKeySpec skeySpec = getKey(keyString);

        // IMPORTANT TO GET SAME RESULTS ON iOS and ANDROID
        final byte[] iv = new byte[16];
        Arrays.fill(iv, (byte) 0x00);
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);

        // Cipher is not thread safe
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivParameterSpec);

        return cipher.doFinal(clearText);

    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (InvalidAlgorithmParameterException e) {
        e.printStackTrace();
    }
    return null;
}

From source file:de.hybris.platform.b2b.punchout.services.impl.SymmetricManager.java

public static String encrypt(final String unsecureText, final String key) throws PunchOutCipherException {
    String encrypted = null;/*from ww w  .  j ava2 s  .  c  o m*/
    try {
        final Key skeySpec = new SecretKeySpec(new Base64().decode(key), ALGORITHM);
        final Cipher cipher = Cipher.getInstance(ALGORITHM);
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);

        final byte[] encryptedValue = cipher.doFinal(unsecureText.getBytes());
        encrypted = new Base64().encodeAsString(encryptedValue);
    } catch (final NoSuchAlgorithmException | NoSuchPaddingException e) {
        // should never happen
        LOG.error("System was unable instantiate Cipher.", e);
    } catch (InvalidKeyException | BadPaddingException | IllegalBlockSizeException e) {
        final String msg = "Error occured during encryption." + e.getMessage();
        LOG.error(msg);
        throw new PunchOutCipherException(msg, e);
    }

    return encrypted;
}

From source file:com.basp.trabajo_al_minuto.model.business.BusinessSecurity.java

/**
 * Se encarga de encriptar la contrasea ingresada por el usuario *
 *//* w w  w . jav  a2  s  . c o m*/
public static String encrypt(String value) throws BusinessException {
    String secretKey = "e-business";
    String base64EncryptedString = "";
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] digestOfPassword = md.digest(secretKey.getBytes("utf-8"));
        byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
        SecretKey key = new SecretKeySpec(keyBytes, "DESede");
        Cipher cipher = Cipher.getInstance("DESede");
        cipher.init(Cipher.ENCRYPT_MODE, key);
        byte[] plainTextBytes = value.getBytes("utf-8");
        byte[] buf = cipher.doFinal(plainTextBytes);
        byte[] base64Bytes = Base64.encodeBase64(buf);
        base64EncryptedString = new String(base64Bytes);
    } catch (Exception ex) {
        throw new BusinessException(ex);
    }
    return base64EncryptedString;
}