Example usage for java.security SecureRandom getInstance

List of usage examples for java.security SecureRandom getInstance

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Introduction

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

Prototype

public static SecureRandom getInstance(String algorithm, SecureRandomParameters params)
        throws NoSuchAlgorithmException

Source Link

Document

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

Usage

From source file:com.github.tojo.session.cookies.SessionInACookieDefaultImpl.java

@Override
public CookieValue encode(SessionData sessionData) throws CipherStrategyException {
    try {//from  w  ww  .  j av  a 2  s. c o  m
        // 1. create session id
        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG", "SUN");
        byte[] sessionId = new byte[SESSION_ID_LENGTH];
        secureRandom.nextBytes(sessionId);

        // 2. prefix session data with the session id
        byte[] dataWithSessionId = ArrayUtils.addAll(sessionId, sessionData.asBytes());

        // 3. calculate the cookie value
        CookieValue cookieValue = encryptSignAndEncode(dataWithSessionId);

        // 4. hit timeout strategy
        timeoutStrategy.issue(sessionData, cookieValue);

        return cookieValue;
    } catch (NoSuchAlgorithmException | NoSuchProviderException e) {
        throw new RuntimeException(e);
    }
}

From source file:com.offbynull.peernetic.common.identification.IdGenerator.java

/**
 * Constructs a {@link DefaultIdGenerator} using {@link SecureRandom} (with SUN / SHA1PRNG implementation).
 * @param limit maximum value the id generated can be
 * @throws NoSuchAlgorithmException thrown by {@link SecureRandom#getInstance(java.lang.String, java.lang.String) }
 * @throws NoSuchProviderException thrown by {@link SecureRandom#getInstance(java.lang.String, java.lang.String) }
 * @throws NullPointerException if any arguments are {@code null}
 * @throws IllegalArgumentException if limit is 0
 *//*  w w w . j a va 2 s  .  com*/
public IdGenerator(byte[] limit) throws NoSuchAlgorithmException, NoSuchProviderException {
    this(SecureRandom.getInstance("SHA1PRNG", "SUN"), limit);
}

From source file:org.apache.hadoop.crypto.JceAesCtrCryptoCodec.java

@Override
public void setConf(Configuration conf) {
    this.conf = conf;
    provider = conf.get(HADOOP_SECURITY_CRYPTO_JCE_PROVIDER_KEY);
    final String secureRandomAlg = conf.get(HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_KEY,
            HADOOP_SECURITY_JAVA_SECURE_RANDOM_ALGORITHM_DEFAULT);
    try {//  ww  w  .  j  av  a2 s  . co m
        random = (provider != null) ? SecureRandom.getInstance(secureRandomAlg, provider)
                : SecureRandom.getInstance(secureRandomAlg);
    } catch (GeneralSecurityException e) {
        LOG.warn(e.getMessage());
        random = new SecureRandom();
    }
}

From source file:com.offbynull.voip.kademlia.State.java

public State(Address timerAddress, Address graphAddress, Address logAddress, byte[] seed1, byte[] seed2,
        Id baseId, KademliaParameters kademliaParameters, AddressTransformer addressTransformer) {
    Validate.notNull(timerAddress);/*from w  w  w.  j  ava2 s.  c  o  m*/
    Validate.notNull(graphAddress);
    Validate.notNull(logAddress);
    Validate.notNull(seed1);
    Validate.notNull(baseId);
    Validate.notNull(kademliaParameters);
    Validate.notNull(addressTransformer);
    Validate.isTrue(seed1.length >= IdGenerator.MIN_SEED_SIZE);
    Validate.isTrue(seed2.length >= IdGenerator.MIN_SEED_SIZE);
    this.timerAddress = timerAddress;
    this.graphAddress = graphAddress;
    this.logAddress = logAddress;
    idGenerator = new IdGenerator(seed1);

    try {
        secureRandom = SecureRandom.getInstance("SHA1PRNG", "SUN");
    } catch (NoSuchAlgorithmException | NoSuchProviderException ex) {
        throw new IllegalStateException(ex);
    }
    secureRandom.setSeed(seed2);

    this.baseId = baseId;
    this.router = new Router(baseId, kademliaParameters.getBranchStrategy().get(),
            kademliaParameters.getBucketStrategy().get());
    this.maxConcurrentRequestsPerFind = kademliaParameters.getMaxConcurrentRequestsPerFind();

    this.graphHelper = new GraphHelper(baseId, graphAddress, router);

    this.addressTransformer = addressTransformer;
}

From source file:org.apache.hadoop.hbase.io.crypto.aes.CommonsCryptoAES.java

public CommonsCryptoAES(CipherProvider provider) {
    super(provider);
    // The mode for Commons Crypto Ciphers
    cipherMode = provider.getConf().get(CIPHER_MODE_KEY, "AES/CTR/NoPadding");
    // Reads Commons Crypto properties from HBase conf
    props = readCryptoProps(provider.getConf());
    // RNG algorithm
    rngAlgorithm = provider.getConf().get(RNG_ALGORITHM_KEY, "SHA1PRNG");
    // RNG provider, null if default
    String rngProvider = provider.getConf().get(RNG_PROVIDER_KEY);
    try {/*  w w  w  .  j  av  a2s  . co  m*/
        if (rngProvider != null) {
            rng = SecureRandom.getInstance(rngAlgorithm, rngProvider);
        } else {
            rng = SecureRandom.getInstance(rngAlgorithm);
        }
    } catch (GeneralSecurityException e) {
        LOG.warn("Could not instantiate specified RNG, falling back to default", e);
        rng = new SecureRandom();
    }
}

From source file:org.apache.abdera.security.util.KeyHelper.java

public static KeyPair generateKeyPair(String type, int size, String provider)
        throws NoSuchAlgorithmException, NoSuchProviderException {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance(type, provider);
    SecureRandom random = SecureRandom.getInstance("SHA1PRNG", provider);
    keyGen.initialize(size, random);/*w  w w . j av a  2s  .  co m*/
    random.setSeed(System.currentTimeMillis());
    return keyGen.generateKeyPair();
}

From source file:org.apache.hadoop.hbase.io.crypto.aes.AES.java

public AES(CipherProvider provider) {
    super(provider);
    // The JCE mode for Ciphers
    cipherMode = provider.getConf().get(CIPHER_MODE_KEY, "AES/CTR/NoPadding");
    // The JCE provider, null if default
    cipherProvider = provider.getConf().get(CIPHER_PROVIDER_KEY);
    // RNG algorithm
    rngAlgorithm = provider.getConf().get(RNG_ALGORITHM_KEY, "SHA1PRNG");
    // RNG provider, null if default
    String rngProvider = provider.getConf().get(RNG_PROVIDER_KEY);
    try {/*  w w  w. ja  va  2s .  c om*/
        if (rngProvider != null) {
            rng = SecureRandom.getInstance(rngAlgorithm, rngProvider);
        } else {
            rng = SecureRandom.getInstance(rngAlgorithm);
        }
    } catch (GeneralSecurityException e) {
        LOG.warn("Could not instantiate specified RNG, falling back to default", e);
        rng = new SecureRandom();
    }
}

From source file:de.rrze.idmone.utils.jpwgen.RandomFactory.java

/**
 * Create a two pseudo random generator by utilizing the
 * <em>SecureRandom</em> class provided by SUN. Uses a two step procedure
 * for feeding the generator seed with two separate SecureRandom instances.
 * /*from  ww  w . j av a2s  .  c o  m*/
 * @see http 
 *      ://java.sun.com/j2se/1.4.2/docs/api/java/security/SecureRandom.html
 * 
 * @param algorithm
 *            The algorithm used for creating the pseudo random generator
 * @param provider
 *            the provider identifier
 * @return a seeded <em>SecureRandom</em>
 * @throws NoSuchAlgorithmException
 * @throws NoSuchProviderException
 */
private SecureRandom initSecureRandom(String algorithm, String provider)
        throws NoSuchAlgorithmException, NoSuchProviderException {
    logger.debug("Initializing random with: " + algorithm + " : " + provider);
    if (provider == null)
        provider = PROVIDER_DEFAULT;

    // Create a secure random number generator
    SecureRandom sr = SecureRandom.getInstance(algorithm, provider);

    // Get 1024 random bits
    byte[] bytes = new byte[1024 / 8];
    sr.nextBytes(bytes);

    // Create two secure number generators with the same seed
    int seedByteCount = 10;
    byte[] seed = sr.generateSeed(seedByteCount);

    sr = SecureRandom.getInstance(algorithm, provider);
    sr.setSeed(seed);

    SecureRandom sr2 = SecureRandom.getInstance(algorithm, provider);
    sr2.setSeed(seed);
    return sr2;
}

From source file:de.rrze.idmone.utils.jidgen.random.RandomFactory.java

/**
 * Create a two pseudo random generator by utilizing the
 * <em>SecureRandom</em> class provided by SUN. Uses a two step procedure
 * for feeding the generator seed with two separate SecureRandom instances.
 * /*from  w  ww .j a  v  a  2 s.  c  om*/
 * @see http://java.sun.com/j2se/1.4.2/docs/api/java/security/SecureRandom.html
 * 
 * @param algorithm
 *            The algorithm used for creating the pseudo random generator
 * @param provider
 *            the provider identifier
 * @return a seeded <em>SecureRandom</em>
 * @throws NoSuchAlgorithmException
 * @throws NoSuchProviderException
 */
private SecureRandom initSecureRandom(String algorithm, String provider)
        throws NoSuchAlgorithmException, NoSuchProviderException {
    logger.debug(Messages.getString("RandomFactory.INIT") + algorithm + " : " + provider);
    if (provider == null)
        provider = PROVIDER_DEFAULT;

    // Create a secure random number generator
    SecureRandom sr = SecureRandom.getInstance(algorithm, provider);

    // Get 1024 random bits
    byte[] bytes = new byte[1024 / 8];
    sr.nextBytes(bytes);

    // Create two secure number generators with the same seed
    int seedByteCount = 10;
    byte[] seed = sr.generateSeed(seedByteCount);

    sr = SecureRandom.getInstance(algorithm, provider);
    sr.setSeed(seed);

    SecureRandom sr2 = SecureRandom.getInstance(algorithm, provider);
    sr2.setSeed(seed);
    return sr2;
}

From source file:org.lockss.util.urlconn.PermissiveSSLProtocolSocketFactory.java

private static SSLContext createPermissiveSSLContext() {
    try {//www .  j  a v a 2 s  .  c  om
        LockssDaemon daemon = LockssDaemon.getLockssDaemon();
        SecureRandom rng;
        if (daemon.isDaemonRunning()) {
            RandomManager rmgr = daemon.getRandomManager();
            rng = rmgr.getSecureRandom();
        } else {
            rng = SecureRandom.getInstance(RandomManager.DEFAULT_SECURE_RANDOM_ALGORITHM,
                    RandomManager.DEFAULT_SECURE_RANDOM_PROVIDER);
        }
        SSLContext context = SSLContext.getInstance("SSL");
        context.init(null, new TrustManager[] { new PermissiveX509TrustManager(null) }, rng);
        return context;
    } catch (Exception e) {
        LOG.error(e.getMessage(), e);
        throw new HttpClientError(e.toString());
    }
}