Example usage for java.security SecureRandom SecureRandom

Introduction

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

Prototype

public SecureRandom()

Source Link

Document

Constructs a secure random number generator (RNG) implementing the default random number algorithm.

Usage

From source file:fi.ilmoeuro.membertrack.util.Crypto.java

public static String randomSalt() {
    byte[] randomBytes = new byte[32];
    SecureRandom random = new SecureRandom();
    random.nextBytes(randomBytes);/* w  w  w . j  a v a2s .c  o  m*/
    String salt = Hex.encodeHexString(randomBytes);
    return salt;
}

From source file:login.login_servlet.java

public String generateToken(int len) {
    String AB = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
    SecureRandom rnd = new SecureRandom();
    StringBuilder sb = new StringBuilder(len);
    for (int i = 0; i < len; i++)
        sb.append(AB.charAt(rnd.nextInt(AB.length())));

    return sb.toString();

}

From source file:com.amazonaws.tvm.AESEncryption.java

private static byte[] getIv() throws Exception {
    byte[] iv = new byte[16];
    new SecureRandom().nextBytes(iv);

    return iv;/*from  ww w . j a  va  2  s.  c o  m*/
}

From source file:com.datasingularity.http.asyncget.ssl.EasySSLSocketFactory.java

private static SSLContext createEasySSLContext() throws IOException {
    try {//from   w ww .j a  v  a  2s. co  m
        SSLContext context = SSLContext.getInstance("TLS");
        context.init(null, new TrustManager[] { new VeryTrustingTrustManager() }, new SecureRandom());
        return context;
    } catch (Exception e) {
        throw new IOException(e.getMessage());
    }
}

From source file:com.apabi.r2k.common.security.util.NonceUtils.java

/**
 * SecureRandom?Long.
 */
public static long randomLong() {
    return new SecureRandom().nextLong();
}

From source file:com.aqnote.shared.cryptology.asymmetric.dsa.DSAKeyPairGenTest.java

public static void generator() throws NoSuchAlgorithmException, FileNotFoundException, IOException {
    KeyPairGenerator keygen = KeyPairGenerator.getInstance(ALGORITHM);

    // ???/*w w  w.  j  a  v a  2  s.c  om*/
    SecureRandom secrand = new SecureRandom();
    secrand.setSeed(seed); // ??
    // ??, ??keysize ?. 512  1024  64 ?
    keygen.initialize(512, secrand);
    // ?pubkey?prikey
    KeyPair keys = keygen.generateKeyPair(); // ?
    PublicKey pubkey = keys.getPublic();
    PrivateKey prikey = keys.getPrivate();

    byte[] pubkeyByteArray = Base64.encodeBase64(pubkey.getEncoded());
    OutputStream os = new FileOutputStream(new File(PUBKEY_FILE_NAME));
    ByteArrayInputStream bais = new ByteArrayInputStream(pubkeyByteArray);
    StreamUtil.io(bais, os);
    bais.close();
    os.close();

    byte[] prikeyByteArray = Base64.encodeBase64(prikey.getEncoded());
    os = new FileOutputStream(new File(PRIKEY_FILE_NAME));
    bais = new ByteArrayInputStream(prikeyByteArray);
    StreamUtil.io(bais, os);
    bais.close();
    os.close();
}

From source file:UUID.java

/**
 * DOCUMENT ME!//from  w  w w.  j a v  a 2 s. co m
 *
 * @return DOCUMENT ME!
 */
public static UUID randomUUID() {
    SecureRandom securerandom = numberGenerator;

    if (securerandom == null) {
        numberGenerator = securerandom = new SecureRandom();
    }

    byte[] abyte0 = new byte[16];
    securerandom.nextBytes(abyte0);
    abyte0[6] &= 0xf;
    abyte0[6] |= 0x40;
    abyte0[8] &= 0x3f;
    abyte0[8] |= 0x80;

    UUID uuid = new UUID(abyte0);

    return new UUID(abyte0);
}

From source file:com.google.gwtjsonrpc.server.SignedToken.java

/**
 * Generate a random key for use with the XSRF library.
 * //w  w w .jav a2 s .  c o  m
 * @return a new private key, base 64 encoded.
 */
public static String generateRandomKey() {
    final byte[] r = new byte[26];
    new SecureRandom().nextBytes(r);
    return encodeBase64(r);
}

From source file:co.cask.cdap.client.rest.RestUtil.java

public static Registry<ConnectionSocketFactory> getRegistryWithDisabledCertCheck()
        throws KeyManagementException, NoSuchAlgorithmException {
    SSLContext sslContext = SSLContext.getInstance("SSL");
    sslContext.init(null, new TrustManager[] { new X509TrustManager() {
        @Override/*from  ww w.j a  v a2 s  .com*/
        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
            return null;
        }

        @Override
        public void checkClientTrusted(java.security.cert.X509Certificate[] x509Certificates, String s)
                throws CertificateException {
        }

        @Override
        public void checkServerTrusted(java.security.cert.X509Certificate[] x509Certificates, String s)
                throws CertificateException {
        }
    } }, new SecureRandom());
    SSLConnectionSocketFactory sf = new SSLConnectionSocketFactory(sslContext,
            SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
    return RegistryBuilder.<ConnectionSocketFactory>create().register("https", sf)
            .register("http", PlainConnectionSocketFactory.getSocketFactory()).build();
}

From source file:fr.cph.stock.security.Security.java

/**
 * Generate a salt, a random key, en encrypt it
 * /* w w w.  j  a  v a2  s.c  om*/
 * @return a key encrypted
 * @throws NoSuchAlgorithmException
 *             the NoSuchAlgorithmException
 * @throws UnsupportedEncodingException
 *             the UnsupportedEncodingException
 */
public static String generateSalt() throws NoSuchAlgorithmException, UnsupportedEncodingException {
    SecureRandom random = new SecureRandom();
    return Security.encodeToSha256(random.toString());
}