Example usage for javax.crypto KeyGenerator init

Introduction

In this page you can find the example usage for javax.crypto KeyGenerator init.

Prototype

public final void init(int keysize)

Source Link

Document

Initializes this key generator for a certain keysize.

Usage

From source file:net.sf.xfd.provider.PublicProvider.java

private static @Nullable Key getSalt(Context c) {
    if (cookieSalt == null) {
        synchronized (PublicProvider.class) {
            if (cookieSalt == null) {
                try {
                    try (ObjectInputStream oos = new ObjectInputStream(c.openFileInput(COOKIE_FILE))) {
                        cookieSalt = (Key) oos.readObject();
                    } catch (ClassNotFoundException | IOException e) {
                        LogUtil.logCautiously("Unable to read key file, probably corrupted or missing", e);

                        final File corrupted = c.getFileStreamPath(COOKIE_FILE);

                        //noinspection ResultOfMethodCallIgnored
                        corrupted.delete();
                    }/*from   w ww  . j  a  va 2  s .co m*/

                    if (cookieSalt != null) {
                        return cookieSalt;
                    }

                    final KeyGenerator keygen = KeyGenerator.getInstance("HmacSHA1");
                    keygen.init(COOKIE_SIZE * Byte.SIZE);

                    cookieSalt = keygen.generateKey();

                    try (ObjectOutputStream oos = new ObjectOutputStream(
                            c.openFileOutput(COOKIE_FILE, Context.MODE_PRIVATE))) {
                        oos.writeObject(cookieSalt);
                    } catch (IOException e) {
                        LogUtil.logCautiously("Failed to save key file", e);

                        return null;
                    }
                } catch (NoSuchAlgorithmException e) {
                    throw new AssertionError("failed to initialize hash functions", e);
                }
            }
        }
    }

    return cookieSalt;
}

From source file:jef.tools.security.EncrypterUtil.java

/**
 * ?KEY/* w  w w. j  a  v a2s. com*/
 * 
 * @param value
 * @param algom
 *            
 * @return
 */
public static final SecretKey generateKey(String algom, int keylength) {
    try {
        KeyGenerator keygen = KeyGenerator.getInstance(algom);
        keygen.init(keylength);
        SecretKey deskey = keygen.generateKey();
        return deskey;
    } catch (GeneralSecurityException e) {
        throw new RuntimeException(e);
    }
}

From source file:org.openintents.safe.CryptoHelper.java

/**
 * @return null if failure, otherwise hex string version of key
 * @author Isaac Potoczny-Jones/*from  w  w w .ja  v  a  2s  .  co  m*/
 */
public static String generateMasterKey() throws NoSuchAlgorithmException {
    try {
        KeyGenerator keygen;
        keygen = KeyGenerator.getInstance("AES");
        keygen.init(256);
        SecretKey genDesKey = keygen.generateKey();
        return toHexString(genDesKey.getEncoded());
    } catch (NoSuchAlgorithmException e) {
        Log.e(TAG, "generateMasterKey(): " + e.toString());
        throw e;
    }
}

From source file:com.javiermoreno.springboot.rest.CryptographyServiceImplBlowfish.java

public CryptographyServiceImplBlowfish()
        throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("Blowfish");
    keyGenerator.init(128);
    key = keyGenerator.generateKey();/*from   www. ja va2s.c o m*/
    cipherEncrypt = Cipher.getInstance("Blowfish/ECB/PKCS5Padding");
    cipherEncrypt.init(Cipher.ENCRYPT_MODE, key);
    cipherDecrypt = Cipher.getInstance("Blowfish/ECB/PKCS5Padding");
    cipherDecrypt.init(Cipher.DECRYPT_MODE, key);
}

From source file:com.thoughtworks.go.security.AESCipherProvider.java

private byte[] generateKey() throws NoSuchAlgorithmException {
    KeyGenerator keygen = KeyGenerator.getInstance("AES");
    keygen.init(128);
    byte[] key = keygen.generateKey().getEncoded();
    return key;//from   ww  w . j  ava2 s  .co  m
}

From source file:ezbake.security.service.sync.LocksmithKeySupplierTest.java

String getAESKey() throws NoSuchAlgorithmException {
    KeyGenerator keygenerator = KeyGenerator.getInstance("AES");
    keygenerator.init(256);
    return Base64.encodeBase64String(keygenerator.generateKey().getEncoded());
}

From source file:org.edeoliveira.oauth2.dropwizard.oauth2.auth.CookieEncrypter.java

public CookieEncrypter() throws Exception {
    // Get the KeyGenerator
    KeyGenerator kgen = KeyGenerator.getInstance(ALGORITHM);
    kgen.init(BIT_LENGTH); // 192 and 256 bits may not be available

    // Generate the secret key specs
    SecretKey skey = kgen.generateKey();
    byte[] secretKey = skey.getEncoded();
    keySpec = new SecretKeySpec(secretKey, ALGORITHM);
}

From source file:com.evolveum.midpoint.init.ConfigurableProtectorFactory.java

public void init() {
    Configuration config = configuration.getConfiguration(PROTECTOR_CONFIGURATION);
    protectorConfig = new ProtectorConfiguration(config);

    //Extract file if not exists
    if (config.getString("midpoint.home") == null) {
        return;//from w  w  w.j a  v  a 2 s .com
    }

    File ks = new File(protectorConfig.getKeyStorePath());
    if (ks.exists()) {
        return;
    }

    //todo improve
    FileOutputStream fos = null;
    try {
        KeyStore keystore = KeyStore.getInstance("jceks");
        char[] password = "changeit".toCharArray();

        keystore.load(null, password);

        KeyGenerator keyGen = KeyGenerator.getInstance("AES");
        keyGen.init(128);
        SecretKey secretKey = keyGen.generateKey();

        keystore.setKeyEntry("default", secretKey, "midpoint".toCharArray(), null);

        fos = new FileOutputStream(protectorConfig.getKeyStorePath());
        keystore.store(fos, password);
        fos.close();
    } catch (Exception ex) {
        throw new SystemException("Couldn't generate keystore, reason: " + ex.getMessage(), ex);
    } finally {
        IOUtils.closeQuietly(fos);
    }
}

From source file:pl.mwaleria.safecommunicator.core.cipher.CipherManager.java

public byte[] encrypt(byte[] input, PublicKey publicKey) throws CryptoException {
    try {//w w w  .  j  a  va  2  s  .c om
        KeyGenerator generator = KeyGenerator.getInstance(Constants.CIPHER_SYMETRIC_ALGORITHM);
        generator.init(Constants.CIPHER_SYMETRIC_SIZE);
        SecretKey key = generator.generateKey();
        byte[] aesKey = key.getEncoded();
        byte[] cryptedAesKey = this.encryptAsymetric(aesKey, publicKey);
        Cipher cipher = Cipher.getInstance(Constants.CIPHER_SYMETRIC_INSTANCE);
        cipher.init(Cipher.ENCRYPT_MODE, key);
        return ArrayUtils.addAll(cryptedAesKey, cipher.doFinal(input));
    } catch (NoSuchAlgorithmException | InvalidKeyException | NoSuchPaddingException | IllegalBlockSizeException
            | BadPaddingException ex) {
        Logger.getLogger(CipherManager.class.getName()).log(Level.SEVERE, null, ex);
        throw new CryptoException(ex);
    }
}

From source file:org.wildfly.security.keystore.ModifyTrackingKeyStoreTest.java

private SecretKey getSecretKey() throws GeneralSecurityException {
    KeyGenerator keyGen = KeyGenerator.getInstance("AES");
    keyGen.init(128);

    return keyGen.generateKey();
}