Example usage for java.util Random nextBytes

Introduction

In this page you can find the example usage for java.util Random nextBytes.

Prototype

public void nextBytes(byte[] bytes)

Source Link

Document

Generates random bytes and places them into a user-supplied byte array.

Usage

From source file:com.funambol.foundation.util.FileDataObjectHelper.java

private byte[] createRandomByteArray(int fileSize) {
    byte[] dummyByteArray = new byte[fileSize];
    //        for (int i = 0; i < fileSize; i++) {
    //            dummyByteArray[i] = (byte) (fileSize - i);
    //        }//from ww w  .j  ava 2s  .c  om
    Random rand = new Random();
    rand.nextBytes(dummyByteArray);
    return dummyByteArray;
}

From source file:com.intel.chimera.CryptoCodecTest.java

@Before
public void setUp() throws IOException {
    Random random = new SecureRandom();
    random.nextBytes(key);
    random.nextBytes(iv);// w w  w . j a  v  a 2  s . c o m
    props = new Properties();
}

From source file:org.apache.cassandra.db.marshal.TypeCompareTest.java

License:asdf

@Test
public void testLong() {
    Random rng = new Random();
    byte[][] data = new byte[1000][];
    for (int i = 0; i < data.length; i++) {
        data[i] = new byte[8];
        rng.nextBytes(data[i]);
    }/* w  w  w  . j  a v  a 2 s  .  c  o  m*/

    Arrays.sort(data, LongType.instance);

    for (int i = 1; i < data.length; i++) {
        long l0 = ByteBuffer.wrap(data[i - 1]).getLong();
        long l1 = ByteBuffer.wrap(data[i]).getLong();
        assert l0 <= l1;
    }
}

From source file:org.apache.wink.itest.standard.JAXRSReaderTest.java

/**
 * Tests a resource method invoked with a BufferedReader as a parameter.
 * This should fail with a 415 since the reader has no way to necessarily
 * wrap it to the type./*from  ww  w  .j  av  a 2 s.  c o m*/
 * 
 * @throws HttpException
 * @throws IOException
 */
public void testInputStreamImplementation() throws HttpException, IOException {
    HttpClient client = new HttpClient();

    PostMethod postMethod = new PostMethod(getBaseURI() + "/providers/standard/reader/subclasses/shouldfail");
    byte[] barr = new byte[1000];
    Random r = new Random();
    r.nextBytes(barr);
    postMethod.setRequestEntity(new InputStreamRequestEntity(new ByteArrayInputStream(barr), "any/type"));
    try {
        client.executeMethod(postMethod);
        assertEquals(415, postMethod.getStatusCode());
    } finally {
        postMethod.releaseConnection();
    }
}

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

private void writeFile(FileSystem fileSys, Path name, int repl, int fileSize, int blockSize)
        throws IOException {
    // create and write a file that contains three blocks of data
    FSDataOutputStream stm = fileSys.create(name, true, fileSys.getConf().getInt("io.file.buffer.size", 4096),
            (short) repl, (long) blockSize);
    byte[] buffer = new byte[fileSize];
    Random rand = new Random(seed);
    rand.nextBytes(buffer);
    stm.write(buffer);/*ww  w .j av  a2  s  .  co  m*/
    stm.close();
}

From source file:org.apache.weasel.V06Handshake.java

private String generateKey() {
    Random random = new Random(System.currentTimeMillis());
    byte[] key = new byte[16];
    random.nextBytes(key);
    return new String(Base64.encodeBase64(key));
}

From source file:org.apache.wink.itest.standard.JAXRSInputStreamTest.java

/**
 * Tests a resource method invoked with a ByteArrayInputStream as a
 * parameter. This should fail with a 415 since the reader has no way to
 * necessarily wrap it to the type.//ww w  .  j  a v a2  s .co  m
 * 
 * @throws HttpException
 * @throws IOException
 */
public void testInputStreamImplementation() throws HttpException, IOException {
    HttpClient client = new HttpClient();

    PostMethod postMethod = new PostMethod(
            getBaseURI() + "/providers/standard/inputstream/subclasses/shouldfail");
    byte[] barr = new byte[100000];
    Random r = new Random();
    r.nextBytes(barr);
    postMethod.setRequestEntity(new InputStreamRequestEntity(new ByteArrayInputStream(barr), "any/type"));
    try {
        client.executeMethod(postMethod);
        assertEquals(415, postMethod.getStatusCode());
    } finally {
        postMethod.releaseConnection();
    }
}

From source file:com.google.nigori.common.DSATest.java

public void generateTestVectors() throws NoSuchAlgorithmException {
    byte[] privateKey = new byte[NigoriConstants.B_DSA];
    Random random = new Random();
    for (int i = 0; i < 5; ++i) {
        random.nextBytes(privateKey);
        DSASign signer = new DSASign(privateKey);

        System.out.println("Private key: " + Hex.encodeHexString(privateKey));
        System.out.println("Public key: " + Hex.encodeHexString(signer.getPublicKey()));

        String[] messages = { "message", "", "test",
                "A message which is longer than a short one and hence might trigger bugs due to long messages which are long long long long................. _* This is a long message *_ .........." };
        for (String message : messages) {
            DSASignature sig = signer.sign(MessageLibrary.toBytes(message));
            System.out.println("Message: '" + message + "'");
            System.out.println("Signature: r: " + Hex.encodeHexString(sig.getR()) + " s: "
                    + Hex.encodeHexString(sig.getS()));
        }/*w  w w  .ja v  a2 s  .c o m*/
    }
}

From source file:org.apache.wink.itest.standard.JAXRSSourceTest.java

/**
 * Tests a resource method invoked with a SAXSource as a parameter. This
 * should fail with a 415 since the reader has no way to necessarily wrap it
 * to the type.//from  w  w  w. j av  a 2s  .c om
 * 
 * @throws HttpException
 * @throws IOException
 */
public void testSourceSubclassImplementation() throws HttpException, IOException {
    HttpClient client = new HttpClient();

    PostMethod postMethod = new PostMethod(getBaseURI() + "/providers/standard/source/subclasses/shouldfail");
    byte[] barr = new byte[1000];
    Random r = new Random();
    r.nextBytes(barr);
    postMethod
            .setRequestEntity(new InputStreamRequestEntity(new ByteArrayInputStream(barr), "application/xml"));
    try {
        client.executeMethod(postMethod);
        assertEquals(415, postMethod.getStatusCode());
    } finally {
        postMethod.releaseConnection();
    }
}

From source file:gobblin.crypto.RotatingAESCodecTest.java

@Test
public void testLotsOfData() throws Exception {
    long bytesToWrite = 20 * 1000 * 1000;
    byte[] buf = new byte[16384];
    long bytesWritten = 0;
    SimpleCredentialStore credStore = new SimpleCredentialStore();
    RotatingAESCodec encryptor = new RotatingAESCodec(credStore);
    ByteArrayOutputStream sink = new ByteArrayOutputStream();
    ByteArrayOutputStream originalBytesStream = new ByteArrayOutputStream();
    OutputStream encryptedStream = encryptor.encodeOutputStream(sink);
    Random r = new Random();

    while (bytesWritten < bytesToWrite) {
        r.nextBytes(buf);
        originalBytesStream.write(buf);/*from  w  w  w.j a  v a  2 s  . co  m*/
        encryptedStream.write(buf);
        bytesWritten += buf.length;
    }

    encryptedStream.close();
    byte[] originalBytes = originalBytesStream.toByteArray();
    byte[] encryptedBytes = sink.toByteArray();

    manuallyDecodeAndVerifyBytes(originalBytes, encryptedBytes, credStore);

    // Try with stream
    InputStream decoderIn = encryptor.decodeInputStream(new ByteArrayInputStream(encryptedBytes));
    byte[] decoded = IOUtils.toByteArray(decoderIn);
    Assert.assertEquals(decoded, originalBytes, "Expected decoded output to match encoded output");
}