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.oidc.session.DefaultOIDCSessionStateManager.java

private static String generateSaltValue() throws NoSuchAlgorithmException {

    byte[] bytes = new byte[16];
    SecureRandom secureRandom = SecureRandom.getInstance(RANDOM_ALG_SHA1);
    secureRandom.nextBytes(bytes);/*  w w w  .j a  va  2s.c  o m*/
    return Base64.encodeBase64URLSafeString(bytes);
}

From source file:org.toffi.domainmodel.encryptor.impl.AESEncryptorImpl.java

/**
 * Initializes encryptor with current encryption key.
 *
 * @param password//  w w  w.j ava 2 s .co m
 */
public AESEncryptorImpl(String password) {
    try {
        // key = new SecretKeySpec(DigestUtils.sha256(password), "AES");
        key = new SecretKeySpec(DigestUtils.sha256(password), 0, 16, Constants.AES);

        // initialize secure random
        random = SecureRandom.getInstance(Constants.SHA1PRNG);

        // initialize ciphers
        encCipher = Cipher.getInstance(Constants.AES_MODE);
        decCipher = Cipher.getInstance(Constants.AES_MODE);
        ivLen = encCipher.getBlockSize();
    } catch (Exception e) {
        throw new EncryptorException("Error while initializing AESEncryptorImpl.", e);
    }
}

From source file:com.sap.prd.mobile.ios.mios.xcodeprojreader.ProjectFile.java

public String generateReference() {
    MessageDigest md = null;// ww  w  . j ava  2s. c o m
    SecureRandom prng = null;
    try {
        md = MessageDigest.getInstance("SHA1");
        prng = SecureRandom.getInstance("SHA1PRNG");
    } catch (NoSuchAlgorithmException e) {
    }

    String randomNum = new Integer(prng.nextInt()).toString();
    String ref = new String(Hex.encodeHex(md.digest(randomNum.getBytes())));
    return ref.toUpperCase().substring(0, 24);
}

From source file:SuperPeer.java

/**
 * SuperPeer Constructor. It takes the number of bits in the key.
 *///from   w w  w.j  a  v a2 s. c o  m
SuperPeer(int _mbits) throws RemoteException, NoSuchAlgorithmException {
    lock = false;
    lg = new Logger("SuperPeer");
    mbits = _mbits;
    peertable = new TreeSet<PeerInfo>(new PeerInfoComparator());
    prng = SecureRandom.getInstance("SHA1PRNG");
    hasher = new SHA1Hasher(mbits);
    lg.log(Level.FINER, "SuperPeer started.");
}

From source file:org.linagora.linshare.core.utils.HashUtils.java

/**
 * generate salt (32 bits/4 octets)//w  w w.jav  a 2 s.  c o m
 * @return
 */
public static byte[] getSalt() {
    // Get 32 random bits
    byte[] mybytes;
    try {
        // Create a secure random number generator
        SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

        // Create secure number generator with seed
        int seedByteCount = 10;
        byte[] seed = sr.generateSeed(seedByteCount);

        sr = SecureRandom.getInstance("SHA1PRNG");
        sr.setSeed(seed);

        mybytes = new byte[32 / 8];
        sr.nextBytes(mybytes);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
    return mybytes;
}

From source file:eu.uqasar.service.AuthenticationService.java

/**
 *
 * @return @throws NoSuchAlgorithmException
 *//*w  w w. j a  v  a 2  s . c o m*/
public static byte[] generateSalt() throws NoSuchAlgorithmException {
    // VERY important to use SecureRandom instead of just Random
    SecureRandom random = SecureRandom.getInstance("SHA1PRNG");

    // 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:com.hypersocket.auth.PasswordEncryptionService.java

public byte[] generateSalt() throws NoSuchAlgorithmException {
    // VERY important to use SecureRandom instead of just Random
    SecureRandom random = SecureRandom.getInstance("SHA1PRNG");

    // Generate a 8 byte (64 bit) salt as recommended by RSA PKCS5
    byte[] salt = new byte[8];
    random.nextBytes(salt);//w  ww . j  a  va 2 s .co  m

    return salt;
}

From source file:org.taverna.server.master.worker.PasswordIssuer.java

public PasswordIssuer(String algorithm) throws NoSuchAlgorithmException {
    r = SecureRandom.getInstance(algorithm);
    log.info("constructing passwords with " + r.getAlgorithm());
    setLength(8);/*from w w  w  .j a va  2  s. com*/
}

From source file:uk.ac.horizon.ubihelper.protocol.ProtocolManager.java

public ProtocolManager() {
    random = new Random(System.currentTimeMillis());
    try {/*from www. j a v  a  2s.co  m*/
        srandom = SecureRandom.getInstance("SHA1PRNG");
    } catch (Exception e) {
        logger.warning("Could not get SecureRandom: " + e);
    }
    try {
        messageDigest = MessageDigest.getInstance("MD5");
    } catch (Exception e) {
        logger.warning("Could not get MessageDigest: " + e);
    }

}

From source file:org.underworldlabs.util.DesEncrypter.java

public static String generateKey(int length) {
    try {//from w  ww  .j av a 2s. c om
        StringBuffer key = new StringBuffer(length);
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
        byte[] intbytes = new byte[4];

        for (int i = 0; i < length; i++) {
            random.nextBytes(intbytes);
            key.append(pwdChars[Math.abs(getIntFromByte(intbytes) % pwdChars.length)]);
        }

        return key.toString();
    } catch (NoSuchAlgorithmException e) {
        return null;
    }
}