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:com.diversityarrays.dalclient.DalUtil.java

/**
 * Generate a 64-bit random number./*from w  w  w.ja v a 2 s.  c o  m*/
 * @return the number as a String
 */
static public String createRandomNumberString() {
    SecureRandom random = new SecureRandom();

    byte[] sixtyFourBits = new byte[8];
    random.nextBytes(sixtyFourBits);
    // Let's be positive about this :-)
    sixtyFourBits[0] = (byte) (0x7f & sixtyFourBits[0]);

    BigInteger bigint = new BigInteger(sixtyFourBits);
    return bigint.toString();
}

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From source file:org.hyperledger.account.BIP39Test.java

@Test
public void bip39EncodeDecodeTest() throws IOException, JSONException, HyperLedgerException {
    JSONObject testData = readObject(TESTS);
    JSONArray english = testData.getJSONArray("english");
    for (int i = 0; i < testData.length(); ++i) {
        JSONArray test = english.getJSONArray(i);
        byte[] m = Mnemonic.decode(test.getString(1), "HyperLedger");
        assertTrue(test.getString(1).equals(Mnemonic.encode(m, "HyperLedger")));
    }/*from   www .j av  a2s  . com*/
    SecureRandom random = new SecureRandom();
    for (int i = 0; i < 100; ++i) {
        byte[] secret = new byte[32];
        random.nextBytes(secret);
        String e = Mnemonic.encode(secret, "HyperLedger");
        assertTrue(Arrays.equals(Mnemonic.decode(e, "HyperLedger"), secret));
    }
}

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From source file:snow.security.SessionRegistry.java

public String newAccessToken() {

    SecureRandom ng = Holder.numberGenerator;

    byte[] randomBytes = new byte[16];
    ng.nextBytes(randomBytes);

    return new String(encodeBase64URLSafeString(randomBytes));
}

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From source file:com.tremolosecurity.openunison.util.OpenUnisonUtils.java

private static void exportSPMetaData(Options options, CommandLine cmd, TremoloType tt, KeyStore ks)
        throws Exception, KeyStoreException, NoSuchAlgorithmException, UnrecoverableKeyException,
        CertificateEncodingException, MarshallingException {
    logger.info("Finding mechanism...");
    String mechanismName = loadOption(cmd, "mechanismName", options);
    MechanismType saml2Mech = loadMechanismType(mechanismName, tt);
    logger.info("...found");

    logger.info("Finding chain...");
    String chainName = loadOption(cmd, "chainName", options);

    AuthChainType act = loadChainType(chainName, tt);

    logger.info("Looking for correct mechanism on the chain...");
    AuthMechType currentMechanism = null;
    for (AuthMechType amt : act.getAuthMech()) {
        if (amt.getName().equalsIgnoreCase(mechanismName)) {
            currentMechanism = amt;//from  w  ww. j av  a 2s. c  o m
            break;
        }
    }

    if (currentMechanism == null) {
        System.err.println("Unknown chain on mechanism");
        System.exit(1);
    }

    InitializationService.initialize();

    logger.info("loading url base");

    String urlBase = loadOption(cmd, "urlBase", options);

    String url = urlBase + saml2Mech.getUri();

    SecureRandom random = new SecureRandom();
    byte[] idBytes = new byte[20];
    random.nextBytes(idBytes);

    String id = "f" + Hex.encodeHexString(idBytes);

    EntityDescriptorBuilder edb = new EntityDescriptorBuilder();
    EntityDescriptorImpl ed = (EntityDescriptorImpl) edb.buildObject();
    ed.setID(id);
    ed.setEntityID(url);

    SPSSODescriptorBuilder spb = new SPSSODescriptorBuilder();
    SPSSODescriptorImpl sp = (SPSSODescriptorImpl) spb.buildObject();
    ed.getRoleDescriptors().add(sp);

    HashMap<String, ParamType> params = new HashMap<String, ParamType>();
    for (ParamType pt : currentMechanism.getParams().getParam()) {
        params.put(pt.getName(), pt);
    }

    boolean assertionsSigned = params.get("assertionsSigned") != null
            && params.get("assertionsSigned").getValue().equalsIgnoreCase("true");
    sp.setWantAssertionsSigned(assertionsSigned);
    sp.addSupportedProtocol("urn:oasis:names:tc:SAML:2.0:protocol");

    SingleLogoutServiceBuilder slsb = new SingleLogoutServiceBuilder();
    SingleLogoutService sls = slsb.buildObject();
    sls.setLocation(url);
    sls.setBinding("urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect");
    sp.getSingleLogoutServices().add(sls);

    sls = slsb.buildObject();
    sls.setLocation(url);
    sls.setBinding("urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST");
    sp.getSingleLogoutServices().add(sls);

    AssertionConsumerServiceBuilder acsb = new AssertionConsumerServiceBuilder();
    AssertionConsumerService acs = acsb.buildObject();
    acs.setLocation(url);
    acs.setBinding("urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST");
    acs.setIndex(0);
    acs.setIsDefault(true);
    sp.getAssertionConsumerServices().add(acs);

    acs = acsb.buildObject();
    acs.setLocation(url);
    acs.setBinding("urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect");
    acs.setIndex(1);
    sp.getAssertionConsumerServices().add(acs);

    if (params.get("spSigKey") != null && !params.get("spSigKey").getValue().isEmpty()) {
        String alias = params.get("spSigKey").getValue();
        X509Certificate certFromKS = (X509Certificate) ks.getCertificate(alias);

        if (certFromKS == null) {
            throw new Exception("Certificate '" + params.get("spSigKey").getValue() + "' not found");
        }

        PrivateKey keyFromKS = (PrivateKey) ks.getKey(alias, tt.getKeyStorePassword().toCharArray());
        KeyDescriptorBuilder kdb = new KeyDescriptorBuilder();
        KeyDescriptor kd = kdb.buildObject();
        kd.setUse(UsageType.SIGNING);
        KeyInfoBuilder kib = new KeyInfoBuilder();
        KeyInfo ki = kib.buildObject();

        X509DataBuilder x509b = new X509DataBuilder();
        X509Data x509 = x509b.buildObject();
        X509CertificateBuilder certb = new X509CertificateBuilder();
        org.opensaml.xmlsec.signature.X509Certificate cert = certb.buildObject();
        cert.setValue(new String(Base64.encode(certFromKS.getEncoded())));
        x509.getX509Certificates().add(cert);
        ki.getX509Datas().add(x509);
        kd.setKeyInfo(ki);
        sp.getKeyDescriptors().add(kd);

    }

    if (params.get("spEncKey") != null && !params.get("spEncKey").getValue().isEmpty()) {
        String alias = params.get("spEncKey").getValue();
        X509Certificate certFromKS = (X509Certificate) ks.getCertificate(alias);

        if (certFromKS == null) {
            throw new Exception("Certificate '" + params.get("spEncKey").getValue() + "' not found");
        }

        PrivateKey keyFromKS = (PrivateKey) ks.getKey(alias, tt.getKeyStorePassword().toCharArray());
        KeyDescriptorBuilder kdb = new KeyDescriptorBuilder();
        KeyDescriptor kd = kdb.buildObject();
        kd.setUse(UsageType.ENCRYPTION);
        KeyInfoBuilder kib = new KeyInfoBuilder();
        KeyInfo ki = kib.buildObject();

        X509DataBuilder x509b = new X509DataBuilder();
        X509Data x509 = x509b.buildObject();
        X509CertificateBuilder certb = new X509CertificateBuilder();
        org.opensaml.xmlsec.signature.X509Certificate cert = certb.buildObject();
        cert.setValue(new String(Base64.encode(certFromKS.getEncoded())));
        x509.getX509Certificates().add(cert);
        ki.getX509Datas().add(x509);
        kd.setKeyInfo(ki);
        sp.getKeyDescriptors().add(kd);

    }

    EntityDescriptorMarshaller marshaller = new EntityDescriptorMarshaller();

    // Marshall the Subject
    Element assertionElement = marshaller.marshall(ed);

    String xml = net.shibboleth.utilities.java.support.xml.SerializeSupport.prettyPrintXML(assertionElement);

    logger.info(xml);
}

---

From source file:dk.netarkivet.harvester.harvesting.metadata.MetadataFileWriterTester.java

@Test
public void testMetadataFileWriterArc() throws IOException {
    File metafile = getOutputArcFile("metadata.arc");
    MetadataFileWriter mdfw = MetadataFileWriterArc.createWriter(metafile);

    String uri = "http://www.netarkivet.dk/";
    long ctm = System.currentTimeMillis();

    SecureRandom random = new SecureRandom();
    byte[] payload = new byte[8192];
    random.nextBytes(payload);

    mdfw.write(uri, "application/binary", "127.0.0.1", ctm, payload);
    mdfw.close();/*from   w w w . j  a  va  2  s. c om*/
    metafile.deleteOnExit();

    File metadataArcFile = getOutputArcFile("42-metadata-1.arc");
    MetadataFileWriter mfwa = MetadataFileWriterArc.createWriter(metadataArcFile);
    for (File f : logsDir.listFiles()) {
        mfwa.writeFileTo(f, "metadata://netarkivet.dk/crawl/logs/" + f.getName(), "text/plain");
    }
}

---

From source file:dk.netarkivet.harvester.harvesting.MetadataFileWriterTester.java

public void testMetadataFileWriterArc() {
    File metafile = new File("metadata.arc");
    MetadataFileWriter mdfw = MetadataFileWriterArc.createWriter(metafile);

    String uri = "http://www.netarkivet.dk/";
    long ctm = System.currentTimeMillis();

    SecureRandom random = new SecureRandom();
    byte[] payload = new byte[8192];
    random.nextBytes(payload);

    try {//  www.j  av a 2 s  .  c om
        mdfw.write(uri, "application/binary", "127.0.0.1", ctm, payload);
        mdfw.close();
    } catch (IOException e) {
        e.printStackTrace();
        Assert.fail("Unexpected exception!");
    }

    metafile.deleteOnExit();

    File metadataArcFile = new File(TestInfo.WORKING_DIR, "42-metadata-1.arc");
    MetadataFileWriter mfwa = MetadataFileWriterArc.createWriter(metadataArcFile);
    for (File f : logsDir.listFiles()) {
        mfwa.writeFileTo(f, "metadata://netarkivet.dk/crawl/logs/" + f.getName(), "text/plain");
    }
}

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From source file:edu.cmu.sei.ams.cloudlet.impl.AESEncrypter.java

/**
 * Encrypts data and returns the encrypted string.
 * @param clear A byte array to encrypt.
 * @return An encrypted string./*from   w w  w  .  j  av  a  2 s.  c o  m*/
 * @throws EncryptionException
 */
public String encrypt(byte[] clear) throws EncryptionException {
    try {
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
        byte[] b = new byte[16];
        random.nextBytes(b);
        byte[] iv = b;
        //log.info("IV: " + String.valueOf(Hex.encodeHex(iv)));

        // TODO: change to CBC method with padding.
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, this.skeySpec, new IvParameterSpec(iv));

        byte[] encrypted = cipher.doFinal(clear);
        //log.info("Cipher Text: " + String.valueOf(Hex.encodeHex(encrypted)));
        String encryptedString = new String(Base64.encodeBase64(ivCipherConcat(iv, encrypted)));
        return encryptedString;
    } catch (Exception e) {
        throw new EncryptionException("Error encrypting information", e);
    }
}

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From source file:org.zuinnote.hadoop.office.format.common.writer.msexcel.internal.EncryptedTempData.java

public EncryptedTempData(CipherAlgorithm ca, ChainingMode cm) throws IOException {
    // generate random key for temnporary files
    if (ca != null) {
        SecureRandom sr = new SecureRandom();
        byte[] iv = new byte[ca.blockSize];
        byte[] key = new byte[ca.defaultKeySize / 8];
        sr.nextBytes(iv);
        sr.nextBytes(key);/*from w  w w  . j a v  a  2s  .  co  m*/
        SecretKeySpec skeySpec = new SecretKeySpec(key, ca.jceId);
        this.ca = ca;
        this.cm = cm;
        if (this.cm.jceId.equals(ChainingMode.ecb.jceId)) { // does not work with Crpyto Functions since it does not require IV
            this.cm = ChainingMode.cbc;
        }
        this.ciEncrypt = CryptoFunctions.getCipher(skeySpec, ca, cm, iv, Cipher.ENCRYPT_MODE, "PKCS5Padding");
        this.ciDecrypt = CryptoFunctions.getCipher(skeySpec, ca, cm, iv, Cipher.DECRYPT_MODE, "PKCS5Padding");
    }
    this.tempFile = TempFile.createTempFile("hadooffice-poi-temp-data", ".tmp");
}

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From source file:dk.netarkivet.harvester.harvesting.metadata.MetadataFileWriterTester.java

@Test
public void testMetadataFileWriterWarc() throws IOException {
    File metafile = getOutputArcFile("metadata.warc");
    MetadataFileWriter mdfw = MetadataFileWriterWarc.createWriter(metafile);

    String uri = "http://www.netarkivet.dk/";
    long ctm = System.currentTimeMillis();

    SecureRandom random = new SecureRandom();
    byte[] payload = new byte[8192];
    random.nextBytes(payload);

    mdfw.write(uri, "application/binary", "127.0.0.1", ctm, payload);
    mdfw.close();/*from   w w  w.j a  va2s  .co m*/

    metafile.deleteOnExit();

    File metadataArcFile = getOutputArcFile("42-metadata-1.warc");
    MetadataFileWriter mfwa = MetadataFileWriterWarc.createWriter(metadataArcFile);
    ((MetadataFileWriterWarc) mfwa).insertInfoRecord(new ANVLRecord());

    for (File f : logsDir.listFiles()) {
        mfwa.writeFileTo(f, "metadata://netarkivet.dk/crawl/logs/" + f.getName(), "text/plain");
    }
}

---

From source file:dk.netarkivet.harvester.harvesting.MetadataFileWriterTester.java

public void testMetadataFileWriterWarc() {
    File metafile = new File("metadata.warc");
    MetadataFileWriter mdfw = MetadataFileWriterWarc.createWriter(metafile);

    String uri = "http://www.netarkivet.dk/";
    long ctm = System.currentTimeMillis();

    SecureRandom random = new SecureRandom();
    byte[] payload = new byte[8192];
    random.nextBytes(payload);

    try {/*  w  ww .j a  v  a  2  s  . co  m*/
        mdfw.write(uri, "application/binary", "127.0.0.1", ctm, payload);
        mdfw.close();
    } catch (IOException e) {
        e.printStackTrace();
        Assert.fail("Unexpected exception!");
    }

    metafile.deleteOnExit();

    File metadataArcFile = new File(TestInfo.WORKING_DIR, "42-metadata-1.warc");
    MetadataFileWriter mfwa = MetadataFileWriterWarc.createWriter(metadataArcFile);
    ((MetadataFileWriterWarc) mfwa).insertInfoRecord(new ANVLRecord());
    for (File f : logsDir.listFiles()) {
        mfwa.writeFileTo(f, "metadata://netarkivet.dk/crawl/logs/" + f.getName(), "text/plain");
    }
}

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