Example usage for javax.crypto KeyGenerator init

List of usage examples for javax.crypto KeyGenerator init

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Introduction

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

Prototype

public final void init(int keysize, SecureRandom random)

Source Link

Document

Initializes this key generator for a certain keysize, using a user-provided source of randomness.

Usage

From source file:MainClass.java

public static void main(String args[]) throws Exception {

    KeyGenerator keyGen = KeyGenerator.getInstance("DES");
    SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
    random.setSeed(101L);/* w  w w  .  j ava  2  s. c o  m*/
    keyGen.init(56, random);
    SecretKey sKey = keyGen.generateKey();
    SecretKeyFactory kfactory = SecretKeyFactory.getInstance("DES");

    DESKeySpec kspec = (DESKeySpec) kfactory.getKeySpec(sKey, DESKeySpec.class);

    System.out.println(sKey);
    FileOutputStream fos = new FileOutputStream("secretKeys");
    ObjectOutputStream oos = new ObjectOutputStream(fos);

    oos.writeObject(kspec.getKey());

    FileInputStream fin = new FileInputStream("secretKeys");
    ObjectInputStream ois = new ObjectInputStream(fin);

    byte[] kMaterial = (byte[]) ois.readObject();

    DESKeySpec keyspec = new DESKeySpec(kMaterial);
    SecretKey newKey = kfactory.generateSecret(keyspec);
    System.out.println(newKey);
    System.out.println("Do the keys equal :" + newKey.equals(sKey));

}

From source file:com.tremolosecurity.openunison.util.OpenUnisonUtils.java

public static void main(String[] args) throws Exception {

    logger = org.apache.logging.log4j.LogManager.getLogger(OpenUnisonUtils.class.getName());

    Options options = new Options();
    options.addOption("unisonXMLFile", true, "The full path to the Unison xml file");
    options.addOption("keystorePath", true, "The full path to the Unison keystore");
    options.addOption("chainName", true, "The name of the authentication chain");
    options.addOption("mechanismName", true, "The name of the authentication mechanism for SAML2");
    options.addOption("idpName", true, "The name of the identity provider application");
    options.addOption("pathToMetaData", true, "The full path to the saml2 metadata file");
    options.addOption("createDefault", false, "If set, add default parameters");
    options.addOption("action", true,
            "export-sp-metadata, import-sp-metadata, export-secretkey, print-secretkey, import-idp-metadata, export-idp-metadata, clear-dlq, import-secretkey, create-secretkey");
    options.addOption("urlBase", true, "Base URL, no URI; https://host:port");
    options.addOption("alias", true, "Key alias");
    options.addOption("newKeystorePath", true, "Path to the new keystore");
    options.addOption("newKeystorePassword", true, "Password for the new keystore");
    options.addOption("help", false, "Prints this message");
    options.addOption("signMetadataWithKey", true, "Signs the metadata with the specified key");
    options.addOption("dlqName", true, "The name of the dead letter queue");
    options.addOption("upgradeFrom106", false, "Updates workflows from 1.0.6");
    options.addOption("secretkey", true, "base64 encoded secret key");
    options.addOption("envFile", true, "Environment variables for parmaterized configs");

    CommandLineParser parser = new DefaultParser();
    CommandLine cmd = parser.parse(options, args, true);

    if (args.length == 0 || cmd.hasOption("help")) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp("OpenUnisonUtils", options);
    }/*from  www  .j av  a2  s. co m*/

    logger.info("Loading Unison Configuration");
    String unisonXMLFile = loadOption(cmd, "unisonXMLFile", options);
    TremoloType ttRead = loadTremoloType(unisonXMLFile, cmd, options);

    String action = loadOption(cmd, "action", options);
    TremoloType ttWrite = null;
    if (action.equalsIgnoreCase("import-sp-metadata") || action.equalsIgnoreCase("import-idp-metadata")) {
        ttWrite = loadTremoloType(unisonXMLFile);
    }

    logger.info("Configuration loaded");

    logger.info("Loading the keystore...");
    String ksPath = loadOption(cmd, "keystorePath", options);

    KeyStore ks = loadKeyStore(ksPath, ttRead);

    logger.info("...loaded");

    if (action.equalsIgnoreCase("import-sp-metadata")) {

        importMetaData(options, cmd, unisonXMLFile, ttRead, ttWrite, ksPath, ks);
    } else if (action.equalsIgnoreCase("export-sp-metadata")) {
        exportSPMetaData(options, cmd, ttRead, ks);

    } else if (action.equalsIgnoreCase("print-secretkey")) {
        printSecreyKey(options, cmd, ttRead, ks);
    } else if (action.equalsIgnoreCase("import-secretkey")) {
        importSecreyKey(options, cmd, ttRead, ks, ksPath);
    } else if (action.equalsIgnoreCase("create-secretkey")) {
        Security.addProvider(new BouncyCastleProvider());
        logger.info("Creating AES-256 secret key");
        String alias = loadOption(cmd, "alias", options);
        logger.info("Alias : '" + alias + "'");
        KeyGenerator kg = KeyGenerator.getInstance("AES", "BC");
        kg.init(256, new SecureRandom());
        SecretKey sk = kg.generateKey();
        ks.setKeyEntry(alias, sk, ttRead.getKeyStorePassword().toCharArray(), null);
        logger.info("Saving key");
        ks.store(new FileOutputStream(ksPath), ttRead.getKeyStorePassword().toCharArray());
        logger.info("Finished");
    } else if (action.equalsIgnoreCase("export-secretkey")) {
        logger.info("Export Secret Key");

        logger.info("Loading key");
        String alias = loadOption(cmd, "alias", options);
        SecretKey key = (SecretKey) ks.getKey(alias, ttRead.getKeyStorePassword().toCharArray());
        logger.info("Loading new keystore path");
        String pathToNewKeystore = loadOption(cmd, "newKeystorePath", options);
        logger.info("Loading new keystore password");
        String ksPassword = loadOption(cmd, "newKeystorePassword", options);

        KeyStore newKS = KeyStore.getInstance("PKCS12");
        newKS.load(null, ttRead.getKeyStorePassword().toCharArray());
        newKS.setKeyEntry(alias, key, ksPassword.toCharArray(), null);
        newKS.store(new FileOutputStream(pathToNewKeystore), ksPassword.toCharArray());
        logger.info("Exported");
    } else if (action.equalsIgnoreCase("import-idp-metadata")) {
        importIdpMetadata(options, cmd, unisonXMLFile, ttRead, ttWrite, ksPath, ks);

    } else if (action.equalsIgnoreCase("export-idp-metadata")) {
        exportIdPMetadata(options, cmd, ttRead, ks);
    } else if (action.equalsIgnoreCase("clear-dlq")) {
        logger.info("Getting the DLQ Name...");
        String dlqName = loadOption(cmd, "dlqName", options);
        QueUtils.emptyDLQ(ttRead, dlqName);
    } else if (action.equalsIgnoreCase("upgradeFrom106")) {
        logger.info("Upgrading OpenUnison's configuration from 1.0.6");

        String backupFileName = unisonXMLFile + ".bak";

        logger.info("Backing up to '" + backupFileName + "'");

        BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(unisonXMLFile)));
        PrintWriter out = new PrintWriter(new FileOutputStream(backupFileName));
        String line = null;
        while ((line = in.readLine()) != null) {
            out.println(line);
        }
        out.flush();
        out.close();
        in.close();

        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        AddChoiceToTasks.convert(new FileInputStream(unisonXMLFile), bout);
        FileOutputStream fsout = new FileOutputStream(unisonXMLFile);
        fsout.write(bout.toByteArray());
        fsout.flush();
        fsout.close();

    }

}

From source file:MainClass.java

public static SecretKey createKeyForAES(int bitLength, SecureRandom random)
        throws NoSuchAlgorithmException, NoSuchProviderException {
    KeyGenerator generator = KeyGenerator.getInstance("AES", "BC");
    generator.init(128, random);
    return generator.generateKey();
}

From source file:Main.java

public static byte[] aesEncryptToBytes(String content, String encryptKey) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128, new SecureRandom(encryptKey.getBytes()));

    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));

    return cipher.doFinal(content.getBytes("utf-8"));
}

From source file:Main.java

public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    kgen.init(128, new SecureRandom(decryptKey.getBytes()));

    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));
    byte[] decryptBytes = cipher.doFinal(encryptBytes);

    return new String(decryptBytes);
}

From source file:Main.java

/**
 * do not work/*from   w  w  w.j  av  a  2  s .  co m*/
 */
private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
    keyGenerator.init(128, new SecureRandom(seed)); // 192 and 256 bits may not be available
    return keyGenerator.generateKey().getEncoded();
}

From source file:MainClass.java

public static SecretKey createKeyForAES(int bitLength, SecureRandom random)
        throws NoSuchAlgorithmException, NoSuchProviderException {
    KeyGenerator generator = KeyGenerator.getInstance("AES", "BC");

    generator.init(128, random);

    return generator.generateKey();
}

From source file:MainClass.java

static SecretKey createKeyForAES(int bitLength, SecureRandom random)
        throws NoSuchAlgorithmException, NoSuchProviderException {
    KeyGenerator generator = KeyGenerator.getInstance("AES", "BC");
    generator.init(256, random);
    return generator.generateKey();
}

From source file:de.openflorian.crypt.CipherKeyGenerator.java

/**
 * Generate Cipher Secret<br/>//from  w  w  w.  j a  v a2 s  .c o m
 * <br/>
 * Secret is generated by Blowfish {@link KeyGenerator} and a system default
 * {@link SecureRandom} provider and Base64 encoded afterwards.
 * 
 * @return Base64 encoded {@link SecureRandom} generated encryption key
 * @throws GeneralSecurityException
 */
public static String generateKey() throws GeneralSecurityException {
    try {
        KeyGenerator gen = KeyGenerator.getInstance("Blowfish");
        gen.init(192, new SecureRandom());
        SecretKey key = gen.generateKey();

        return new String(new Base64().encode(key.getEncoded())).trim();
    } catch (Exception e) {
        log.error(e.getMessage(), e);
        throw new GeneralSecurityException(e.getMessage(), e);
    }
}

From source file:Main.java

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
    sr.setSeed(seed);//from ww  w. j  a v a 2  s .co  m
    kgen.init(128, sr);
    SecretKey sKey = kgen.generateKey();
    byte[] raw = sKey.getEncoded();

    return raw;
}