Example usage for java.security SecureRandom getInstance

Introduction

In this page you can find the example usage for java.security SecureRandom getInstance.

Prototype

public static SecureRandom getInstance(String algorithm) throws NoSuchAlgorithmException

Source Link

Document

Returns a SecureRandom object that implements the specified Random Number Generator (RNG) algorithm.

Usage

From source file:org.wso2.carbon.identity.core.util.IdentityUtil.java

/**
 * Generates a secure random hexadecimal string using SHA1 PRNG and digest
 *
 * @return Random hexadecimal encoded String
 * @throws Exception//from w w w . ja va  2s .  c o  m
 */
public static String generateUUID() throws Exception {

    try {
        // SHA1 Pseudo Random Number Generator
        SecureRandom prng = SecureRandom.getInstance("SHA1PRNG");

        // random number
        String randomNum = Integer.toString(prng.nextInt());
        MessageDigest sha = MessageDigest.getInstance("SHA-1");
        byte[] digest = sha.digest(randomNum.getBytes());

        // Hexadecimal encoding
        return new String(Hex.encodeHex(digest));

    } catch (NoSuchAlgorithmException e) {
        throw new Exception("Failed to generate UUID ", e);
    }
}

From source file:org.everit.osgi.password.encryptor.pbkdf2.internal.PBKDF2PasswordEncryptorComponent.java

private byte[] generateSalt() throws NoSuchAlgorithmException {
    // VERY important to use SecureRandom instead of just Random
    SecureRandom random;//from   ww w.  j  a v  a2s. c o  m
    random = SecureRandom.getInstance(SALT_ALGORITHM);
    // Generate a 8 byte (64 bit) salt as recommended by RSA PKCS5
    byte[] salt = new byte[8];
    random.nextBytes(salt);
    return salt;
}

From source file:org.n2.app.beans.RegisterBean.java

/**
 * Creates a fixed length small fingerprint (digest / hash)
 * See: https://www.owasp.org/index.php/Hashing_Java
 *//*from  w  w w .j a v  a2  s .  c  o  m*/
private void securePassword() {
    try {
        // Uses a secure Random not a simple Random
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
        // Salt generation 64 bits long
        byte[] salt = new byte[8];
        random.nextBytes(salt);
        // Digest computation
        byte[] digest = getHash(ITERATION_NUMBER, password, salt);
        setPassword(byteToBase64(digest));
        setSalt(byteToBase64(salt));
    } catch (Exception e) {
        LOG.error("Error while creating password hash", e);
        throw new RuntimeException("Error while creating user.");
    }
}

From source file:com.cloud.vm.VMInstanceVO.java

public VMInstanceVO(long id, long serviceOfferingId, String name, String instanceName, Type type,
        Long vmTemplateId, HypervisorType hypervisorType, long guestOSId, long domainId, long accountId,
        long userId, boolean haEnabled) {
    this.id = id;
    hostName = name != null ? name : uuid;
    if (vmTemplateId != null) {
        templateId = vmTemplateId;// www.j a  v  a  2  s . c o  m
    }
    this.instanceName = instanceName;
    this.type = type;
    this.guestOSId = guestOSId;
    this.haEnabled = haEnabled;
    state = State.Stopped;
    this.accountId = accountId;
    this.domainId = domainId;
    this.serviceOfferingId = serviceOfferingId;
    this.hypervisorType = hypervisorType;
    this.userId = userId;
    limitCpuUse = false;
    try {
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
        byte[] randomBytes = new byte[16];
        random.nextBytes(randomBytes);
        vncPassword = Base64.encodeBase64URLSafeString(randomBytes);
    } catch (NoSuchAlgorithmException e) {
        s_logger.error("Unexpected exception in SecureRandom Algorithm selection ", e);
    }
}

From source file:com.adito.server.jetty.CustomJsseListener.java

protected SSLServerSocketFactory createFactory() throws Exception {
    if (KeyStoreManager.getInstance(KeyStoreManager.DEFAULT_KEY_STORE).isKeyStoreEmpty()) {
        throw new Exception(
                "The keystore does not contain any certificates. Please run the installation wizard (--install).");
    }/*  w w  w  .  j av  a  2s .c om*/
    KeyStore ks = KeyStoreManager.getInstance(KeyStoreManager.DEFAULT_KEY_STORE).getKeyStore();
    String pw = ContextHolder.getContext().getConfig()
            .retrieveProperty(new ContextKey("webServer.keystore.sslCertificate.password"));
    KeyManager[] kma = new KeyManager[] { new CustomKeyManager(pw) };
    TrustManager[] tma = null;
    if (trustManager == null) {
        TrustManagerFactory tm = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
        tm.init(ks);
        tma = tm.getTrustManagers();
    } else {

        // LDP - Add the existing trust managers so that outgoing certificates are still trusted.
        TrustManagerFactory tm = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
        tm.init(ks);

        tma = new TrustManager[tm.getTrustManagers().length + 1];
        for (int i = 0; i < tm.getTrustManagers().length; i++) {
            tma[i] = tm.getTrustManagers()[i];
        }
        tma[tma.length - 1] = trustManager;
    }
    SSLContext sslc = SSLContext.getInstance("SSL");
    sslc.init(kma, tma, SecureRandom.getInstance("SHA1PRNG"));
    SSLServerSocketFactory ssfc = sslc.getServerSocketFactory();
    if (log.isInfoEnabled())
        log.info("SSLServerSocketFactory=" + ssfc);
    initialised = true;
    return ssfc;
}

From source file:com.sslexplorer.server.jetty.CustomJsseListener.java

protected SSLServerSocketFactory createFactory() throws Exception {
    if (KeyStoreManager.getInstance(KeyStoreManager.DEFAULT_KEY_STORE).isKeyStoreEmpty()) {
        throw new Exception(
                "The keystore does not contain any certificates. Please run the installation wizard (--install).");
    }/*from   w  w w  .  j a  v a 2 s . c om*/
    KeyStore ks = KeyStoreManager.getInstance(KeyStoreManager.DEFAULT_KEY_STORE).getKeyStore();
    String pw = ContextHolder.getContext().getConfig()
            .retrieveProperty(new ContextKey("webServer.keystore.sslCertificate.password"));
    KeyManager[] kma = new KeyManager[] { new CustomKeyManager(pw) };
    TrustManager[] tma = null;
    if (trustManager == null) {
        TrustManagerFactory tm = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
        tm.init(ks);
        tma = tm.getTrustManagers();
    } else {

        // LDP - Add the existing trust managers so that outgoing certificates are still trusted.
        TrustManagerFactory tm = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
        tm.init(ks);

        tma = new TrustManager[tm.getTrustManagers().length + 1];
        for (int i = 0; i < tm.getTrustManagers().length - 1; i++) {
            tma[i] = tm.getTrustManagers()[i];
        }
        tma[tma.length - 1] = trustManager;
    }
    SSLContext sslc = SSLContext.getInstance("SSL");
    sslc.init(kma, tma, SecureRandom.getInstance("SHA1PRNG"));
    SSLServerSocketFactory ssfc = sslc.getServerSocketFactory();
    if (log.isInfoEnabled())
        log.info("SSLServerSocketFactory=" + ssfc);
    initialised = true;
    return ssfc;
}

From source file:org.sakaiproject.tool.impl.SessionComponent.java

/**
 * Final initialization, once all dependencies are set.
 *///  w  ww  .  j  av  a  2 s . c  o  m
public void init() {
    // start the maintenance thread
    if (m_checkEvery > 0) {
        m_maintenance = new Maintenance();
        m_maintenance.start();
    }

    // Salt generation 64 bits long

    salt = new byte[8];
    SecureRandom random;
    try {
        random = SecureRandom.getInstance("SHA1PRNG");
        random.nextBytes(salt);
    } catch (NoSuchAlgorithmException e) {
        M_log.warn("Random number generator not available - using time randomness");
        salt = String.valueOf(System.currentTimeMillis()).getBytes();
    }

    M_log.info("init(): interval: " + m_defaultInactiveInterval + " refresh: " + m_checkEvery);
}

From source file:org.wso2.carbon.identity.password.history.store.Impl.DefaultPasswordHistoryDataStore.java

/**
 * This private method returns a saltValue using SecureRandom.
 *
 * @return saltValue//from ww  w. ja  v a  2  s .  com
 */
private String generateSaltValue() {
    String saltValue;
    try {
        SecureRandom secureRandom = SecureRandom.getInstance(SHA_1_PRNG);
        byte[] bytes = new byte[16];
        //secureRandom is automatically seeded by calling nextBytes
        secureRandom.nextBytes(bytes);
        saltValue = Base64.encode(bytes);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("SHA1PRNG algorithm could not be found.");
    }
    return saltValue;
}

From source file:com.aimluck.eip.util.ALCommonUtils.java

/**
 * ID??SecureRandom????//from w  w w .  j  a  v a 2 s  .  c  om
 * 
 * @return random ID??SecureRandom
 */
public static SecureRandom getSecureRandom() {
    SecureRandom random = null;
    try {
        random = SecureRandom.getInstance(DEF_RANDOM_ALGORITHM);
        byte seed[] = random.generateSeed(DEF_RANDOM_LENGTH);
        random.setSeed(seed);
    } catch (Exception e) {
        logger.error("ALCommonUtils.getSecureRandom", e);
        return null;
    }
    return random;
}