Example usage for java.security SecureRandom getInstance

Introduction

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

Prototype

public static SecureRandom getInstance(String algorithm) throws NoSuchAlgorithmException 

Source Link

Document

Returns a SecureRandom object that implements the specified Random Number Generator (RNG) algorithm.

Usage

From source file:org.wso2.carbon.device.mgt.iot.virtualfirealarm.agent.virtual.VirtualHardwareManager.java

private int getRandom(int max, int min, int current, boolean isSmoothed, int svf) {
    if (isSmoothed) {
        int offset = (max - min) * svf / 100;
        double mx = current + offset;
        max = (mx > max) ? max : (int) Math.round(mx);
        double mn = current - offset;
        min = (mn < min) ? min : (int) Math.round(mn);
    }/*from   w  w  w  . ja  v  a2s.  c  om*/
    try {
        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
        return secureRandom.nextInt(max - min) + min;
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("SHA1PRNG algorithm could not be found.");
    }
}

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From source file:org.vasanti.controller.ImageUploader.java

/**
 * Handles the HTTP <code>POST</code> method.
 *
 * @param request servlet request// ww w.  j  av  a2s.c om
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    PrintWriter writer = response.getWriter();
    String path = "";
    if (!ServletFileUpload.isMultipartContent(request)) {
        throw new IllegalArgumentException(
                "Request is not multipart, please 'multipart/form-data' enctype for your form.");
    }
    bnimagesbn images = new bnimagesbn();
    ServletFileUpload uploadHandler = new ServletFileUpload(new DiskFileItemFactory());
    response.setContentType("application/json");
    JSONObject files = new JSONObject();
    try {
        List<FileItem> items = uploadHandler.parseRequest(request);
        for (FileItem item : items) {
            if (item.isFormField()) {
                FileItem colpostid = (FileItem) items.get(0);
                String COLPOSTID = colpostid.getString();
                if (COLPOSTID != null) {
                    images.setCOLPOSTID(COLPOSTID);
                    logger.info("COLPOSTID from View  is = " + COLPOSTID);
                } else if (COLPOSTID == null) {
                    status = false;
                    String error = "Listing Id is empty";
                    files.put("status", status);
                    files.put("error", error);
                }
            } else if (!item.isFormField()) {
                String ImageName = "";
                String name = item.getName();
                String contentType = item.getContentType();
                logger.info("Content Type  of file is " + contentType);
                long size = item.getSize();
                logger.info("Size of file is " + size);
                String filetype = name.substring(name.lastIndexOf("."));
                SecureRandom prng = SecureRandom.getInstance("SHA1PRNG");
                String randomNum = Integer.toString(prng.nextInt());
                MessageDigest sha = MessageDigest.getInstance("SHA-1");
                byte[] result = sha.digest(randomNum.getBytes());
                ImageName = hexEncode(result) + filetype;
                logger.info(" ImageName1 is " + ImageName);
                if (name != null) {
                    if ((size < 9048576) && (("image/jpeg".equals(contentType))
                            || ("image/jpg".equals(contentType)) || ("image/gif".equals(contentType))
                            || ("image/png".equals(contentType)) || ("image/bmp".equals(contentType)))) {
                        images.setCOLIMAGENAME(ImageName);
                    }
                } else if (name == null) {
                    // Update the error status since file name is null
                    status = false;
                    String error = "Image name is empty ";
                    files.put("status", status);
                    files.put("error", error);
                }

                File file = new File(ImagefileUploadPath, ImageName);
                item.write(file);
                path = file.getCanonicalPath();
                logger.info(" ImageName1 CanonicalPath is " + path);
                BufferedImage img = null;
                try {
                    img = ImageIO.read((new File(path)));
                } catch (IOException ex) {
                    logger.error("Logging IO Exception while creating thumbnail", ex);
                }
                BufferedImage thumbImg = Scalr.resize(img, Scalr.Method.QUALITY, Scalr.Mode.AUTOMATIC, 150, 150,
                        Scalr.OP_ANTIALIAS);
                File thumbnailfile = new File(ThumbnailFileUploadPath, ImageName);
                images.setCOLTHUMBNAILNAME(ImageName);
                ImageIO.write(thumbImg, "jpg", thumbnailfile);
                files.put("name", ImageName);
                InsertImageInterface insert = new InsertImageInterface();
                count = insert.InsertImage(images);
                if (count > 0) {
                    status = true;
                    files.put("status", status);
                    files.put("count", count);
                }
                logger.info(files.toString());
            }
        }
    } catch (FileUploadException ex) {
        try {
            logger.error("Got the FileUpload Exception", ex);
            String error = "Some error has occurred";
            files.put("error", error);
        } catch (JSONException ex1) {
            logger.error("Got the JsonException", ex1);
        }
    } catch (Exception ex) {
        logger.error("Got the Exception", ex);
    } finally {
        try {
            files.put("status", status);
            writer.write(files.toString());
            writer.close();
        } catch (JSONException ex) {
            logger.error("Got the JSONException", ex);
        }
    }
}

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From source file:eap.util.EDcodeUtil.java

private static byte[] des(byte[] data, byte[] key, int opMode) {
    try {/*w w w .  j a  v  a 2 s . c o  m*/
        DESKeySpec desKey = new DESKeySpec(key);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES", provider);
        SecretKey secureKey = keyFactory.generateSecret(desKey);

        Cipher cipher = Cipher.getInstance("DES", provider);
        //         SecureRandom secureRandom = new SecureRandom();
        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG"); // provider
        cipher.init(opMode, secureKey, secureRandom);

        return cipher.doFinal(data);
    } catch (Exception e) {
        throw new IllegalArgumentException(e.getMessage(), e);
    }
}

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From source file:com.tremolosecurity.saml.Saml2Assertion.java

public Saml2Assertion(String subject, PrivateKey key, X509Certificate cert, X509Certificate encCert,
        String issuer, String recepient, String audience, boolean signAssertion, boolean signResponse,
        boolean encAssertion, String nameIDFormat, String authnContextRef) {
    this.subject = subject;

    this.sigKey = key;
    this.sigCert = cert;
    this.encCert = encCert;

    long now = System.currentTimeMillis();

    this.notBefore = (new DateTime(now - (5 * 60 * 1000))).withZone(DateTimeZone.UTC);
    this.notAfter = (new DateTime(now + (5 * 60 * 1000))).withZone(DateTimeZone.UTC);
    this.attribs = new ArrayList<Attribute>();
    this.issueInstant = (new DateTime()).withZone(DateTimeZone.UTC);

    this.issuer = issuer;
    this.recepient = recepient;
    this.audience = audience;

    this.signAssertion = signAssertion;
    this.signResponse = signResponse;
    this.encAssertion = encAssertion;

    this.nameIDFormat = nameIDFormat;
    this.authnContextRef = authnContextRef;

    try {/* w w w  .  j  a va2 s .  c  om*/
        this.random = SecureRandom.getInstance("SHA1PRNG");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }

}

---

From source file:org.apache.abdera.ext.oauth.OAuthScheme.java

private String generateNonce() throws AuthenticationException {
    try {/*  w w  w.  j av a  2  s. co m*/
        SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
        byte[] temp = new byte[NONCE_LENGTH];
        sr.nextBytes(temp);
        String n = new String(Hex.encodeHex(temp));
        return n;
    } catch (Exception e) {
        throw new AuthenticationException(e.getMessage(), e);
    }
}

---

From source file:com.qut.middleware.spep.authn.bindings.impl.ArtifactProcessorImpl.java

public void afterPropertiesSet() {
    if (this.entityIdentifier == null || this.sourceID == null) {
        throw new IllegalArgumentException("ESOE identifier has not been specified correctly.");
    }//from   www  .  ja va 2s.com

    if (this.identifierGenerator == null) {
        throw new IllegalArgumentException("Identifier generator has not been specified correctly.");
    }

    if (this.nodeIndex == -1) {
        throw new IllegalArgumentException("Node index has not been specified correctly.");
    }

    try {
        this.random = SecureRandom.getInstance(this.RNG);
        this.random.setSeed(System.currentTimeMillis());

        String packages = ArtifactResolve.class.getPackage().getName();
        String[] schema = new String[] { SchemaConstants.samlProtocol };
        this.artifactResponseMarshaller = new MarshallerImpl<ArtifactResponse>(packages, schema,
                this.keystoreResolver);
        this.artifactResponseUnmarshaller = new UnmarshallerImpl<ArtifactResponse>(packages, schema,
                this.metadataProcessor);
        this.artifactResolveMarshaller = new MarshallerImpl<ArtifactResolve>(packages, schema,
                this.keystoreResolver);
        this.artifactResolveUnmarshaller = new UnmarshallerImpl<ArtifactResolve>(packages, schema,
                this.metadataProcessor);

        this.artifactMap = new ConcurrentHashMap<String, Artifact>();
    } catch (NoSuchAlgorithmException e) {
        throw new IllegalArgumentException(
                "No such algorithm exists for the PRNG. Unable to continue. Error: " + e.getMessage(), e);
    } catch (MarshallerException e) {
        throw new IllegalArgumentException(
                "Error initializing marshaller. Unable to continue. Error: " + e.getMessage(), e);
    } catch (UnmarshallerException e) {
        throw new IllegalArgumentException(
                "Error intitializing unmarshaller. Unable to continue. Error: " + e.getMessage(), e);
    }
}

---

From source file:org.globusonline.nexus.GlobusOnlineRestClient.java

private long generateNonce() {
    SecureRandom sr = null;//from   w w w.ja v  a 2s  .  com
    try {
        sr = SecureRandom.getInstance("SHA1PRNG");
        byte[] bytes = new byte[1024 / 8];
        sr.nextBytes(bytes);
        int seedByteCount = 10;
        byte[] seed = sr.generateSeed(seedByteCount);
        sr = SecureRandom.getInstance("SHA1PRNG");
        sr.setSeed(seed);
    } catch (NoSuchAlgorithmException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return sr.nextLong();
}

---

From source file:com.qut.middleware.esoe.sso.plugins.artifact.impl.ArtifactProcessorImpl.java

public void afterPropertiesSet() {
    if (this.entityIdentifier == null || this.sourceID == null) {
        throw new IllegalArgumentException("ESOE identifier has not been specified correctly.");
    }//  w w  w.  j  a  v a2 s .  com

    if (this.identifierGenerator == null) {
        throw new IllegalArgumentException("Identifier generator has not been specified correctly.");
    }

    if (this.nodeIndex == -1) {
        throw new IllegalArgumentException("Node index has not been specified correctly.");
    }

    try {
        this.random = SecureRandom.getInstance(this.RNG);
        this.random.setSeed(System.currentTimeMillis());

        String packages = ArtifactResolve.class.getPackage().getName();
        String[] schema = new String[] { SchemaConstants.samlProtocol };
        this.artifactResponseMarshaller = new MarshallerImpl<ArtifactResponse>(packages, schema,
                this.keystoreResolver);
        this.artifactResponseUnmarshaller = new UnmarshallerImpl<ArtifactResponse>(packages, schema,
                this.metadataProcessor);
        this.artifactResolveMarshaller = new MarshallerImpl<ArtifactResolve>(packages, schema,
                this.keystoreResolver);
        this.artifactResolveUnmarshaller = new UnmarshallerImpl<ArtifactResolve>(packages, schema,
                this.metadataProcessor);
    } catch (NoSuchAlgorithmException e) {
        throw new IllegalArgumentException(
                "No such algorithm exists for the PRNG. Unable to continue. Error: " + e.getMessage(), e);
    } catch (MarshallerException e) {
        throw new IllegalArgumentException(
                "Error initializing marshaller. Unable to continue. Error: " + e.getMessage(), e);
    } catch (UnmarshallerException e) {
        throw new IllegalArgumentException(
                "Error intitializing unmarshaller. Unable to continue. Error: " + e.getMessage(), e);
    }
}

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From source file:wssec.TestWSSecurityNewSCT.java

public void testSCTKDKTSign() {
    try {/*from w  w  w. ja va2s  .  c  o m*/
        SOAPEnvelope unsignedEnvelope = message.getSOAPEnvelope();
        Document doc = unsignedEnvelope.getAsDocument();
        WSSecHeader secHeader = new WSSecHeader();
        secHeader.insertSecurityHeader(doc);

        WSSecSecurityContextToken sctBuilder = new WSSecSecurityContextToken();
        sctBuilder.prepare(doc, crypto);

        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
        byte[] tempSecret = new byte[16];
        random.nextBytes(tempSecret);

        // Store the secret
        this.secrets.put(sctBuilder.getIdentifier(), tempSecret);

        String tokenId = sctBuilder.getSctId();

        // Derived key signature
        WSSecDKSign sigBuilder = new WSSecDKSign();
        sigBuilder.setExternalKey(tempSecret, tokenId);
        sigBuilder.setSignatureAlgorithm(XMLSignature.ALGO_ID_MAC_HMAC_SHA1);
        sigBuilder.build(doc, secHeader);

        sctBuilder.prependSCTElementToHeader(doc, secHeader);

        if (LOG.isDebugEnabled()) {
            String outputString = org.apache.ws.security.util.XMLUtils.PrettyDocumentToString(doc);
            LOG.debug(outputString);
        }

        verify(doc);
    } catch (Exception e) {
        e.printStackTrace();
        fail(e.getMessage());
    }
}

---

From source file:org.globus.gsi.jsse.SSLConfigurator.java

private SecureRandom loadSecureRandom() throws GlobusSSLConfigurationException {
    try {//ww  w.j  a va2  s.c  om
        return secureRandomAlgorithm == null ? null : SecureRandom.getInstance(secureRandomAlgorithm);
    } catch (NoSuchAlgorithmException e) {
        throw new GlobusSSLConfigurationException(e);
    }
}

---

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