Example usage for java.security SecureRandom nextBytes

Introduction

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

Prototype

@Override
public void nextBytes(byte[] bytes) 

Source Link

Document

Generates a user-specified number of random bytes.

Usage

From source file:de.inpiraten.jdemocrator.TAN.generator.TANGenerator.java

public void generateMasterTANs() throws IOException {
    //Read seed from System.in
    System.out.println("You will be asked to specify a random seed. Please enter a number of random");
    System.out.println("characters to your liking. This will help to seed a secure random number");
    System.out.println("generator which will generate the master TANs for every vote and derive the");
    System.out.println("TANs. The longer your seed the stronger your master TANs.");
    System.out.print("\nEnter the seed for the TAN generator.\n> ");
    String seed = commandLineInput.readLine();
    SecureRandom random = new SecureRandom(
            ArrayUtils.addAll(seed.getBytes(), ("" + System.currentTimeMillis()).getBytes()));

    //Get length of master TANs
    int masterTANlength = -1;
    while (masterTANlength < 6) {
        System.out.print("\nPlease enter the length of the master TANs in bytes. (Standard: 18)\n>");
        int input;
        try {//from   w w  w.ja v a  2  s.  c om
            input = inputInteger();
            if (input > 5) {
                masterTANlength = input;
            } else if (input > 0) {
                System.out
                        .println("Lengths shorter than 6 byte are too insecure. Please chose another length.");
            } else if (input == 0) {
                masterTANlength = 18; //standard option
            } else
                throw new NumberFormatException("Length of master TAN must be positive");
        } catch (NumberFormatException e) {
            System.out.println("Invalid input. Please try again.");
        }
    }

    this.masterTAN = new String[this.event.numberOfElections];
    byte[] rawTAN = new byte[masterTANlength];
    for (int i = 0; i < this.masterTAN.length; i++) {
        random.nextBytes(rawTAN);
        this.masterTAN[i] = Base64.encodeBase64String(rawTAN);
    }
}

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From source file:com.qut.middleware.deployer.logic.RegisterESOELogic.java

private String generatePassphrase() {
    SecureRandom random;
    String passphrase;/* w ww .j  ava2 s .co m*/
    byte[] buf;

    try {
        /* Attempt to get the specified RNG instance */
        random = SecureRandom.getInstance("SHA1PRNG");
    } catch (NoSuchAlgorithmException nsae) {
        this.logger.error("NoSuchAlgorithmException when trying to create SecureRandom instance " //$NON-NLS-1$
                + nsae.getLocalizedMessage());
        this.logger.debug(nsae.getLocalizedMessage(), nsae);
        random = new SecureRandom();
    }

    buf = new byte[Constants.PASSPHRASE_LENGTH];
    random.nextBytes(buf);
    passphrase = new String(Hex.encodeHex(buf));

    return passphrase;
}

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From source file:com.badlogic.gdx.pay.android.ouya.PurchaseManagerAndroidOUYA.java

public void requestPurchase(final Product product)
        throws GeneralSecurityException, UnsupportedEncodingException, JSONException {
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

    // This is an ID that allows you to associate a successful purchase with
    // it's original request. The server does nothing with this string except
    // pass it back to you, so it only needs to be unique within this instance
    // of your app to allow you to pair responses with requests.
    String uniqueId = Long.toHexString(sr.nextLong());

    JSONObject purchaseRequest = new JSONObject();
    purchaseRequest.put("uuid", uniqueId);
    purchaseRequest.put("identifier", product.getIdentifier());
    // purchaseRequest.put("testing", "true"); // !!!! This value is only needed for testing, not setting it results in a live purchase
    String purchaseRequestJson = purchaseRequest.toString();

    byte[] keyBytes = new byte[16];
    sr.nextBytes(keyBytes);
    SecretKey key = new SecretKeySpec(keyBytes, "AES");

    byte[] ivBytes = new byte[16];
    sr.nextBytes(ivBytes);//ww w.jav a  2s .  c  o m
    IvParameterSpec iv = new IvParameterSpec(ivBytes);

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, key, iv);
    byte[] payload = cipher.doFinal(purchaseRequestJson.getBytes("UTF-8"));

    cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, ouyaPublicKey);
    byte[] encryptedKey = cipher.doFinal(keyBytes);

    purchasable = new Purchasable(product.getIdentifier(), Base64.encodeToString(encryptedKey, Base64.NO_WRAP),
            Base64.encodeToString(ivBytes, Base64.NO_WRAP), Base64.encodeToString(payload, Base64.NO_WRAP));

    synchronized (ouyaOutstandingPurchaseRequests) {
        ouyaOutstandingPurchaseRequests.put(uniqueId, product);
    }
}

---

From source file:com.guillaumesoft.escapehellprison.PurchaseActivity.java

public void requestPurchase(final Product product)
        throws GeneralSecurityException, UnsupportedEncodingException, JSONException {
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

    // This is an ID that allows you to associate a successful purchase with
    // it's original request. The server does nothing with this string except
    // pass it back to you, so it only needs to be unique within this instance
    // of your app to allow you to pair responses with requests.
    String uniqueId = Long.toHexString(sr.nextLong());

    JSONObject purchaseRequest = new JSONObject();
    purchaseRequest.put("uuid", uniqueId);
    purchaseRequest.put("identifier", product.getIdentifier());
    purchaseRequest.put("testing", "true"); // This value is only needed for testing, not setting it results in a live purchase
    String purchaseRequestJson = purchaseRequest.toString();

    byte[] keyBytes = new byte[16];
    sr.nextBytes(keyBytes);
    SecretKey key = new SecretKeySpec(keyBytes, "AES");

    byte[] ivBytes = new byte[16];
    sr.nextBytes(ivBytes);/*w w  w  .  j  a va2s.  co  m*/
    IvParameterSpec iv = new IvParameterSpec(ivBytes);

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, key, iv);
    byte[] payload = cipher.doFinal(purchaseRequestJson.getBytes("UTF-8"));

    cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, mPublicKey);
    byte[] encryptedKey = cipher.doFinal(keyBytes);

    Purchasable purchasable = new Purchasable(product.getIdentifier());

    synchronized (mOutstandingPurchaseRequests) {
        mOutstandingPurchaseRequests.put(uniqueId, product);
    }
    mOuyaFacade.requestPurchase(this, purchasable, new PurchaseListener(product));
}

---

From source file:tv.ouya.sample.IapSampleActivity.java

public void requestPurchase(final Product product)
        throws GeneralSecurityException, UnsupportedEncodingException, JSONException {
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

    // This is an ID that allows you to associate a successful purchase with
    // it's original request. The server does nothing with this string except
    // pass it back to you, so it only needs to be unique within this instance
    // of your app to allow you to pair responses with requests.
    String uniqueId = Long.toHexString(sr.nextLong());

    JSONObject purchaseRequest = new JSONObject();
    purchaseRequest.put("uuid", uniqueId);
    purchaseRequest.put("identifier", product.getIdentifier());
    purchaseRequest.put("testing", "true"); // This value is only needed for testing, not setting it results in a live purchase
    String purchaseRequestJson = purchaseRequest.toString();

    byte[] keyBytes = new byte[16];
    sr.nextBytes(keyBytes);
    SecretKey key = new SecretKeySpec(keyBytes, "AES");

    byte[] ivBytes = new byte[16];
    sr.nextBytes(ivBytes);/*from  www  . j a  va  2s.c  o  m*/
    IvParameterSpec iv = new IvParameterSpec(ivBytes);

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, key, iv);
    byte[] payload = cipher.doFinal(purchaseRequestJson.getBytes("UTF-8"));

    cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, mPublicKey);
    byte[] encryptedKey = cipher.doFinal(keyBytes);

    Purchasable purchasable = new Purchasable(product.getIdentifier(),
            Base64.encodeToString(encryptedKey, Base64.NO_WRAP), Base64.encodeToString(ivBytes, Base64.NO_WRAP),
            Base64.encodeToString(payload, Base64.NO_WRAP));

    synchronized (mOutstandingPurchaseRequests) {
        mOutstandingPurchaseRequests.put(uniqueId, product);
    }
    ouyaFacade.requestPurchase(purchasable, new PurchaseListener(product));
}

---

From source file:tv.ouya.sdk.TestOuyaFacade.java

public void requestPurchase(final Product product)
        throws GeneralSecurityException, UnsupportedEncodingException, JSONException {
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

    // This is an ID that allows you to associate a successful purchase with
    // it's original request. The server does nothing with this string except
    // pass it back to you, so it only needs to be unique within this instance
    // of your app to allow you to pair responses with requests.
    String uniqueId = Long.toHexString(sr.nextLong());

    JSONObject purchaseRequest = new JSONObject();
    purchaseRequest.put("uuid", uniqueId);
    purchaseRequest.put("identifier", product.getIdentifier());
    purchaseRequest.put("testing", "true"); // This value is only needed for testing, not setting it results in a live purchase
    String purchaseRequestJson = purchaseRequest.toString();

    byte[] keyBytes = new byte[16];
    sr.nextBytes(keyBytes);
    SecretKey key = new SecretKeySpec(keyBytes, "AES");

    byte[] ivBytes = new byte[16];
    sr.nextBytes(ivBytes);/*from   w ww.j av a 2 s .c  o  m*/
    IvParameterSpec iv = new IvParameterSpec(ivBytes);

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, key, iv);
    byte[] payload = cipher.doFinal(purchaseRequestJson.getBytes("UTF-8"));

    cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, mPublicKey);
    byte[] encryptedKey = cipher.doFinal(keyBytes);

    Purchasable purchasable = new Purchasable(product.getIdentifier(),
            Base64.encodeToString(encryptedKey, Base64.NO_WRAP), Base64.encodeToString(ivBytes, Base64.NO_WRAP),
            Base64.encodeToString(payload, Base64.NO_WRAP));

    synchronized (mOutstandingPurchaseRequests) {
        mOutstandingPurchaseRequests.put(uniqueId, product);
    }

    //custom-iap-code
    Log.i("TestOuyaFacade", "TestOuyaFacade.requestPurchase(" + product.getIdentifier() + ")");
    UnityPlayer.UnitySendMessage("OuyaGameObject", "DebugLog",
            "TestOuyaFacade.requestPurchase(" + product.getIdentifier() + ")");

    ouyaFacade.requestPurchase(purchasable, new PurchaseListener(product));
}

---

From source file:com.netscape.cmsutil.crypto.CryptoUtil.java

/**
 * Generates a nonce_iv for padding./*from  ww  w . j av  a 2 s . co  m*/
 *
 * @throws GeneralSecurityException
 */
public static byte[] getNonceData(int size) throws GeneralSecurityException {
    byte[] iv = new byte[size];

    SecureRandom rnd = CryptoUtil.getRandomNumberGenerator();
    rnd.nextBytes(iv);

    return iv;
}

---

From source file:org.apache.hadoop.hdfs.TestBalancer.java

private void generateFileSystemLoad(long numBlocks, short replication) {
    String destfile = "hdfs:///user/hadoopqa/";// + BALANCER_TEMP_DIR + "/LOADGEN.DAT";
    SecureRandom randgen = new SecureRandom();
    ByteArrayOutputStream dat = null;
    ByteArrayInputStream in = null;
    final int CHUNK = 4096;
    final Configuration testConf = new Configuration(hadoopConf);
    try {/*  w  ww  .  jav  a 2 s  .  c  o m*/
        testConf.setInt("dfs.replication", replication);
        for (int i = 0; i < numBlocks; i++) {
            FileSystem fs = FileSystem.get(URI.create(destfile), testConf);
            OutputStream out = fs.create(new Path(destfile), replication, new ProgressReporter());
            dat = new ByteArrayOutputStream(DFS_BLOCK_SIZE);
            for (int z = 0; z < DFS_BLOCK_SIZE; z += CHUNK) {
                byte[] bytes = new byte[CHUNK];
                randgen.nextBytes(bytes);
                dat.write(bytes, 0, CHUNK);
            }

            in = new ByteArrayInputStream(dat.toByteArray());
            IOUtils.copyBytes(in, out, CHUNK, true);
            LOG.info("wrote block " + (i + 1) + " of " + numBlocks);
        }
    } catch (IOException ioExc) {
        LOG.warn("f/s loadgen failed!", ioExc);
    } finally {
        try {
            dat.close();
        } catch (Exception e) {
        }
        try {
            in.close();
        } catch (Exception e) {
        }
    }
}

---

From source file:tv.ouya.sdk.UnityOuyaFacade.java

public void requestPurchase(final Product product)
        throws GeneralSecurityException, UnsupportedEncodingException, JSONException {
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

    // This is an ID that allows you to associate a successful purchase with
    // it's original request. The server does nothing with this string except
    // pass it back to you, so it only needs to be unique within this instance
    // of your app to allow you to pair responses with requests.
    String uniqueId = Long.toHexString(sr.nextLong());

    JSONObject purchaseRequest = new JSONObject();
    purchaseRequest.put("uuid", uniqueId);
    purchaseRequest.put("identifier", product.getIdentifier());
    purchaseRequest.put("testing", "true"); // This value is only needed for testing, not setting it results in a live purchase
    String purchaseRequestJson = purchaseRequest.toString();

    byte[] keyBytes = new byte[16];
    sr.nextBytes(keyBytes);
    SecretKey key = new SecretKeySpec(keyBytes, "AES");

    byte[] ivBytes = new byte[16];
    sr.nextBytes(ivBytes);/*from   ww  w  . ja  v  a 2  s .  c o m*/
    IvParameterSpec iv = new IvParameterSpec(ivBytes);

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, key, iv);
    byte[] payload = cipher.doFinal(purchaseRequestJson.getBytes("UTF-8"));

    cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
    cipher.init(Cipher.ENCRYPT_MODE, mPublicKey);
    byte[] encryptedKey = cipher.doFinal(keyBytes);

    Purchasable purchasable = new Purchasable(product.getIdentifier(),
            Base64.encodeToString(encryptedKey, Base64.NO_WRAP), Base64.encodeToString(ivBytes, Base64.NO_WRAP),
            Base64.encodeToString(payload, Base64.NO_WRAP));

    synchronized (mOutstandingPurchaseRequests) {
        mOutstandingPurchaseRequests.put(uniqueId, product);
    }

    //custom-iap-code
    Log.i(LOG_TAG, "UnityOuyaFacade.requestPurchase(" + product.getIdentifier() + ")");
    UnityPlayer.UnitySendMessage("OuyaGameObject", "DebugLog",
            "UnityOuyaFacade.requestPurchase(" + product.getIdentifier() + ")");

    ouyaFacade.requestPurchase(purchasable, new PurchaseListener(product));
}

---

From source file:com.servoy.j2db.util.Utils.java

/**
 * Hashes the given string with the PKCS/PBKDF2 algoritme see http://en.wikipedia.org/wiki/PBKDF2 for more information
 *
 * @param textString The string to hash/*from w  ww. j  a  v a2  s . co  m*/
 * @param iterations Number of hash iterations to be done (should be higher then 1000)
 * @return the hash of the string
 */
@SuppressWarnings("nls")
public static String calculatePBKDF2(String textString, int iterations) {
    try {
        SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
        byte[] salt = new byte[8];
        sr.nextBytes(salt);
        PBKDF2Parameters p = new PBKDF2Parameters("HmacSHA1", "ISO-8859-1", salt, iterations);
        PBKDF2Engine e = new PBKDF2Engine(p);
        p.setDerivedKey(e.deriveKey(textString));
        return new PBKDF2HexFormatter().toString(p);
    } catch (NoSuchAlgorithmException e) {
        Debug.error("No SHA1 algorime found under the name SHA1PRNG", e);
    }
    return null;
}

---

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