Example usage for javax.crypto Cipher update

Introduction

In this page you can find the example usage for javax.crypto Cipher update.

Prototype

public final byte[] update(byte[] input) 

Source Link

Document

Continues a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part.

Usage

From source file:hh.learnj.test.license.test.rsa.RSATest.java

/**
 * //from   w w  w.  java  2  s  .co  m
 * 
 * @param target
 * @throws Exception
 */
static void decryptionByPublicKey(String target) throws Exception {
    PublicKey publicKey = getPublicKey();
    Cipher cipher = Cipher.getInstance(publicKey.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, publicKey);
    cipher.update(decodeBase64(target));
    String source = new String(cipher.doFinal(), "UTF-8");
    System.out.println("??\r\n" + source);
}

---

From source file:hh.learnj.test.license.test.rsa.RSATest.java

/**
 * /*from  w  ww. j a va2 s  .  c o  m*/
 * 
 * @param data
 * @return
 * @throws Exception
 */
static String encryptionByPublicKey(String source) throws Exception {
    PublicKey publicKey = getPublicKey();
    Cipher cipher = Cipher.getInstance(publicKey.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, publicKey);
    cipher.update(source.getBytes("UTF-8"));
    String target = encodeBase64(cipher.doFinal());
    System.out.println("??\r\n" + target);
    return target;
}

---

From source file:hh.learnj.test.license.test.rsa.RSATest.java

/**
 * ?//from   w  w w.  j a  v a  2 s .  c om
 * 
 * @param target
 * @throws Exception
 */
static void decryptionByPrivateKey(String target) throws Exception {
    PrivateKey privateKey = getPrivateKey();
    Cipher cipher = Cipher.getInstance(privateKey.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, privateKey);
    cipher.update(decodeBase64(target));
    String source = new String(cipher.doFinal(), "UTF-8");
    System.out.println("???\r\n" + source);
}

---

From source file:hh.learnj.test.license.test.rsa.RSATest.java

/**
 * ?//from  w  ww.j a  va2 s  . com
 * 
 * @param data
 * @return
 * @throws Exception
 */
static String encryptionByPrivateKey(String source) throws Exception {
    PrivateKey privateKey = getPrivateKey();
    Cipher cipher = Cipher.getInstance(privateKey.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, privateKey);
    cipher.update(source.getBytes("UTF-8"));
    String target = encodeBase64(cipher.doFinal());
    System.out.println("???\r\n" + target);
    return target;
}

---

From source file:cloudeventbus.pki.CertificateUtils.java

public static byte[] signChallenge(PrivateKey key, byte[] challenge, byte[] salt) {
    try {/* ww w .j av  a  2  s .  com*/
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.ENCRYPT_MODE, key);
        cipher.update(challenge);
        cipher.update(salt);
        return cipher.doFinal();
    } catch (GeneralSecurityException e) {
        throw new CertificateSecurityException(e);
    }
}

---

From source file:im.whistle.crypt.Crypt.java

/**
 * Encrypts a message./*www.  j av  a 2s.  c  om*/
 * @param args Arguments: data, publicKey[, privateKey]
 * @param callback Callback
 */
public static void encrypt(JSONArray args, AsyncCallback<JSONArray> callback) {
    try {
        PRNGProvider.init(); // Ensure OpenSSL fix

        // Get the arguments
        String data = args.getString(0);
        String pub = args.getString(1);
        String priv = null;
        if (args.length() == 3) {
            priv = args.getString(2);
        }
        String sig = null;

        // Convert everything into byte arrays
        byte[] dataRaw = data.getBytes("utf-8");
        byte[] pubRaw = Base64.decode(stripKey(pub), Base64.DEFAULT);

        // Generate random AES key and IV
        byte[] aesKey = new byte[AES_BYTES];
        new SecureRandom().nextBytes(aesKey);
        byte[] aesIv = new byte[16]; // Block size
        new SecureRandom().nextBytes(aesIv);
        Cipher c = Cipher.getInstance("AES/CBC/PKCS7Padding", "BC");
        c.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(aesKey, "AES"), new IvParameterSpec(aesIv));

        // Encrypt data with AES
        byte[] encData = c.doFinal(dataRaw);

        // Encrypt aes data with RSA
        X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(pubRaw);
        KeyFactory kf = KeyFactory.getInstance("RSA", "BC");
        c = Cipher.getInstance("RSA/None/OAEPWithSHA-1AndMGF1Padding", "BC");
        c.init(Cipher.ENCRYPT_MODE, kf.generatePublic(publicKeySpec));
        c.update(aesKey);
        c.update(aesIv);
        byte[] encKey = c.doFinal();

        // Concatenate and transform
        byte[] encRaw = new byte[encKey.length + encData.length];
        System.arraycopy(encKey, 0, encRaw, 0, encKey.length);
        System.arraycopy(encData, 0, encRaw, encKey.length, encData.length);
        encKey = null;
        encData = null;
        String enc = new String(Base64.encode(encRaw /* needed for sign */, Base64.NO_WRAP), "utf-8");

        // Sign
        if (priv != null) {
            // Fail on error (no try-catch)
            byte[] privRaw = Base64.decode(stripKey(priv), Base64.DEFAULT);
            PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(privRaw);
            Signature s = Signature.getInstance("SHA1withRSA", "BC");
            s.initSign(kf.generatePrivate(privateKeySpec));
            s.update(encRaw);
            sig = new String(Base64.encode(s.sign(), Base64.NO_WRAP), "utf-8");
        }

        JSONArray res = new JSONArray();
        res.put(enc);
        res.put(sig);
        callback.success(res);
    } catch (Exception ex) {
        Log.w("whistle", "Encrypt error: " + ex.getMessage(), ex);
        callback.error(ex);
    }
}

---

From source file:rotmg.net.RotmgNetworkHandler.java

private byte[] decrypt(byte[] bytes, Cipher key) throws IOException {
    return key.update(bytes);
}

---

From source file:info.fcrp.keepitsafe.bean.CryptBeanTest.java

@Test
public void symetric() throws NoSuchAlgorithmException, NoSuchProviderException, NoSuchPaddingException,
        InvalidKeyException, IllegalBlockSizeException, BadPaddingException {

    KeyGenerator kg = KeyGenerator.getInstance("AES");
    kg.init(256, new SecureRandom());
    Key k = kg.generateKey();//from  w w  w.j  ava2s. c  o m

    Cipher c = Cipher.getInstance("AES");
    String plain = "plain";
    byte[] plainBytes = plain.getBytes();

    c.init(Cipher.ENCRYPT_MODE, k);
    c.update(plainBytes);

    byte[] encBytes = c.doFinal();
    String enc = Base64.encodeBase64String(encBytes);
    assertNotSame(plain, enc);

    c.init(Cipher.DECRYPT_MODE, k);
    c.update(encBytes);
    byte[] decBytes = c.doFinal();
    String dec = new String(decBytes);

    assertEquals(plain, dec);
}

---

From source file:info.fcrp.keepitsafe.bean.CryptBeanTest.java

@Test
public void assymetric() throws NoSuchAlgorithmException, NoSuchProviderException, NoSuchPaddingException,
        InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
    KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
    kpg.initialize(1024, new SecureRandom());
    KeyPair kp = kpg.generateKeyPair();
    PrivateKey priKey = kp.getPrivate();
    PublicKey pubKey = kp.getPublic();

    Cipher c = Cipher.getInstance("RSA");
    String plain = "plain";
    byte[] plainBytes = plain.getBytes();

    c.init(Cipher.ENCRYPT_MODE, pubKey);
    c.update(plainBytes);

    byte[] encBytes = c.doFinal();
    String enc = Base64.encodeBase64String(encBytes);
    assertNotSame(plain, enc);/*from   w w  w . j a v a 2  s .  co  m*/

    c.init(Cipher.DECRYPT_MODE, priKey);
    c.update(encBytes);
    byte[] decBytes = c.doFinal();
    String dec = new String(decBytes);

    assertEquals(plain, dec);
}

---

From source file:com.joyent.manta.client.crypto.AesCtrCipherDetails.java

@Override
public long updateCipherToPosition(final Cipher cipher, final long position) {
    final int blockSize = getBlockSizeInBytes();
    final long block = position / blockSize;
    final long skip = (position % blockSize);

    byte[] throwaway = new byte[blockSize];
    for (long i = 0; i < block; i++) {
        cipher.update(throwaway);
    }//from www  .j  a  v a2  s.c o m

    return skip;
}

---

• «
• 1
• 2
• »