Example usage for java.util Random nextBytes

List of usage examples for java.util Random nextBytes

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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:org.ejbca.core.protocol.cmp.CmpMessageHelper.java

/** Creates a 16 bytes random sender nonce
 * /*ww w  .  ja v  a  2 s  .c  o  m*/
 * @return byte array of length 16
 */
public static byte[] createSenderNonce() {
    // Sendernonce is a random number
    byte[] senderNonce = new byte[16];
    Random randomSource;
    randomSource = new Random();
    randomSource.nextBytes(senderNonce);
    return senderNonce;
}

From source file:net.sf.keystore_explorer.crypto.privatekey.Pkcs8Util.java

private static byte[] generateSalt() {
    // Generate random 8-bit salt
    Random random = new Random();
    random.setSeed(Calendar.getInstance().getTimeInMillis());

    byte[] salt = new byte[8];

    random.nextBytes(salt);

    return salt;//ww w  .  j av a  2 s  .c  om
}

From source file:com.netscape.cms.servlet.test.DRMTest.java

private static byte[] genIV(int blockSize) throws Exception {
    // generate an IV
    byte[] iv = new byte[blockSize];

    Random rnd = new Random();
    rnd.nextBytes(iv);

    return iv;//  w ww .j  av  a 2  s  .  com
}

From source file:org.apache.hadoop.yarn.util.TestFSDownload.java

static LocalResource createJarFile(FileContext files, Path p, int len, Random r, LocalResourceVisibility vis)
        throws IOException, URISyntaxException {
    byte[] bytes = new byte[len];
    r.nextBytes(bytes);

    File archiveFile = new File(p.toUri().getPath() + ".jar");
    archiveFile.createNewFile();//from  w  ww.j a  va 2 s .  c om
    JarOutputStream out = new JarOutputStream(new FileOutputStream(archiveFile));
    out.putNextEntry(new JarEntry(p.getName()));
    out.write(bytes);
    out.closeEntry();
    out.close();

    LocalResource ret = recordFactory.newRecordInstance(LocalResource.class);
    ret.setResource(URL.fromPath(new Path(p.toString() + ".jar")));
    ret.setSize(len);
    ret.setType(LocalResourceType.ARCHIVE);
    ret.setVisibility(vis);
    ret.setTimestamp(files.getFileStatus(new Path(p.toString() + ".jar")).getModificationTime());
    return ret;
}

From source file:org.apache.hadoop.yarn.util.TestFSDownload.java

static LocalResource createZipFile(FileContext files, Path p, int len, Random r, LocalResourceVisibility vis)
        throws IOException, URISyntaxException {
    byte[] bytes = new byte[len];
    r.nextBytes(bytes);

    File archiveFile = new File(p.toUri().getPath() + ".ZIP");
    archiveFile.createNewFile();/*from   w w w .  j a v a2s  .com*/
    ZipOutputStream out = new ZipOutputStream(new FileOutputStream(archiveFile));
    out.putNextEntry(new ZipEntry(p.getName()));
    out.write(bytes);
    out.closeEntry();
    out.close();

    LocalResource ret = recordFactory.newRecordInstance(LocalResource.class);
    ret.setResource(URL.fromPath(new Path(p.toString() + ".ZIP")));
    ret.setSize(len);
    ret.setType(LocalResourceType.ARCHIVE);
    ret.setVisibility(vis);
    ret.setTimestamp(files.getFileStatus(new Path(p.toString() + ".ZIP")).getModificationTime());
    return ret;
}

From source file:org.apache.hadoop.yarn.util.TestFSDownload.java

static LocalResource createTarFile(FileContext files, Path p, int len, Random r, LocalResourceVisibility vis)
        throws IOException, URISyntaxException {
    byte[] bytes = new byte[len];
    r.nextBytes(bytes);

    File archiveFile = new File(p.toUri().getPath() + ".tar");
    archiveFile.createNewFile();//from  w  ww  .  ja va2  s  .  co  m
    TarArchiveOutputStream out = new TarArchiveOutputStream(new FileOutputStream(archiveFile));
    TarArchiveEntry entry = new TarArchiveEntry(p.getName());
    entry.setSize(bytes.length);
    out.putArchiveEntry(entry);
    out.write(bytes);
    out.closeArchiveEntry();
    out.close();

    LocalResource ret = recordFactory.newRecordInstance(LocalResource.class);
    ret.setResource(URL.fromPath(new Path(p.toString() + ".tar")));
    ret.setSize(len);
    ret.setType(LocalResourceType.ARCHIVE);
    ret.setVisibility(vis);
    ret.setTimestamp(files.getFileStatus(new Path(p.toString() + ".tar")).getModificationTime());
    return ret;
}

From source file:org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.TestContainerLocalizer.java

@SuppressWarnings({ "rawtypes", "unchecked" })
static DataInputBuffer createFakeCredentials(Random r, int nTok) throws IOException {
    Credentials creds = new Credentials();
    byte[] password = new byte[20];
    Text kind = new Text();
    Text service = new Text();
    Text alias = new Text();
    for (int i = 0; i < nTok; ++i) {
        byte[] identifier = ("idef" + i).getBytes();
        r.nextBytes(password);
        kind.set("kind" + i);
        service.set("service" + i);
        alias.set("token" + i);
        Token token = new Token(identifier, password, kind, service);
        creds.addToken(alias, token);/*from w w  w  .  java 2  s  .  co m*/
    }
    DataOutputBuffer buf = new DataOutputBuffer();
    creds.writeTokenStorageToStream(buf);
    DataInputBuffer ret = new DataInputBuffer();
    ret.reset(buf.getData(), 0, buf.getLength());
    return ret;
}

From source file:org.apache.hadoop.yarn.util.TestFSDownload.java

static LocalResource createTgzFile(FileContext files, Path p, int len, Random r, LocalResourceVisibility vis)
        throws IOException, URISyntaxException {
    byte[] bytes = new byte[len];
    r.nextBytes(bytes);

    File gzipFile = new File(p.toUri().getPath() + ".tar.gz");
    gzipFile.createNewFile();/*ww  w  .  j  a  va 2 s.  co  m*/
    TarArchiveOutputStream out = new TarArchiveOutputStream(
            new GZIPOutputStream(new FileOutputStream(gzipFile)));
    TarArchiveEntry entry = new TarArchiveEntry(p.getName());
    entry.setSize(bytes.length);
    out.putArchiveEntry(entry);
    out.write(bytes);
    out.closeArchiveEntry();
    out.close();

    LocalResource ret = recordFactory.newRecordInstance(LocalResource.class);
    ret.setResource(URL.fromPath(new Path(p.toString() + ".tar.gz")));
    ret.setSize(len);
    ret.setType(LocalResourceType.ARCHIVE);
    ret.setVisibility(vis);
    ret.setTimestamp(files.getFileStatus(new Path(p.toString() + ".tar.gz")).getModificationTime());
    return ret;
}

From source file:org.apache.hadoop.dfs.TestFileCreation.java

static void writeFile(FSDataOutputStream stm, int size) throws IOException {
    byte[] buffer = new byte[fileSize];
    Random rand = new Random(seed);
    rand.nextBytes(buffer);
    stm.write(buffer, 0, size);/*from  w  ww  . j ava  2s. c  om*/
}

From source file:org.apache.hadoop.hbase.regionserver.HFileReadWriteTest.java

private static byte[] createRandomQualifier(Random rand) {
    byte[] q = new byte[10 + rand.nextInt(30)];
    rand.nextBytes(q);
    return q;/*from  ww w .  j ava  2  s  .c o m*/
}