Example usage for java.math BigInteger BigInteger

Introduction

In this page you can find the example usage for java.math BigInteger BigInteger.

Prototype

private BigInteger(byte[] magnitude, int signum) 

Source Link

Document

This private constructor is for internal use and assumes that its arguments are correct.

Usage

From source file:com.saasovation.identityaccess.resource.AbstractResource.java

protected String userETag(User aUser) {

    int hashCode = aUser.hashCode() + aUser.person().hashCode();

    try {/* w w w .j a  v a2 s. com*/
        // change this algorithm as needed
        MessageDigest messageDigest = MessageDigest.getInstance("MD5");
        messageDigest.update(Integer.toString(hashCode).getBytes("UTF-8"));
        BigInteger digestValue = new BigInteger(1, messageDigest.digest());
        String strongHash = digestValue.toString(16);

        return strongHash;

    } catch (Throwable t) {
        return Integer.toString(hashCode);
    }
}

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From source file:fi.vm.kapa.identification.adapter.utils.AuthenticationHandlerUtils.java

public String createToken() {
    return new BigInteger(64, new SecureRandom()).toString(16);
}

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From source file:io.kodokojo.service.redis.AbstractRedisStore.java

public AbstractRedisStore(Key key, String host, int port) {
    if (key == null) {
        throw new IllegalArgumentException("key must be defined.");
    }//from ww w.  j a  v  a 2s.  c om
    if (isBlank(host)) {
        throw new IllegalArgumentException("host must be defined.");
    }
    this.key = key;
    pool = createJedisPool(host, port);
    try {
        messageDigest = MessageDigest.getInstance("SHA-1");
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("Unable to get instance of SHA-1 digest");
    }

    SecureRandom secureRandom = new SecureRandom();
    saltKey = new BigInteger(128, secureRandom).toString(10);
}

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From source file:io.github.hebra.elasticsearch.beat.meterbeat.device.dlink.DSPW215.java

@Override
public String fetchData() {
    final String url = config.getBaseurl().concat("/my_cgi.cgi?")
            .concat(new BigInteger(130, secureRandom).toString(32));

    try {/*from ww  w.  ja v a 2s  .  co m*/
        RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(timeout)
                .setConnectTimeout(timeout).setConnectionRequestTimeout(timeout).build();

        HttpClient client = HttpClientBuilder.create().setConnectionTimeToLive(5, TimeUnit.SECONDS)
                .setConnectionReuseStrategy(new NoConnectionReuseStrategy()).build();
        HttpPost post = new HttpPost(url);

        post.setConfig(requestConfig);

        post.setHeader("User-Agent", USER_AGENT);
        post.setHeader("Accept-Language", "en-US,en;q=0.5");

        final List<NameValuePair> urlParameters = new ArrayList<>();
        urlParameters.add(new BasicNameValuePair("request", "create_chklst"));
        post.setEntity(new UrlEncodedFormEntity(urlParameters));

        final HttpResponse response = client.execute(post);

        final String content = IOUtils.toString(response.getEntity().getContent(), Charsets.US_ASCII);

        EntityUtils.consume(response.getEntity());

        return content.split("Meter Watt: ", 2)[1].trim();
    } catch (IOException ioEx) {
        log.error("Timeout when trying to read from {} on {}: {}", config.getName(), config.getBaseurl(),
                ioEx.getMessage());
    }

    return null;
}

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From source file:com.nloko.android.Utils.java

public static String getMd5Hash(byte[] input) {
    if (input == null) {
        throw new IllegalArgumentException("input");
    }/*from   w ww.j  a v  a2  s. c o  m*/

    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] messageDigest = md.digest(input);
        BigInteger number = new BigInteger(1, messageDigest);
        //String md5 = number.toString(16);
        StringBuffer md5 = new StringBuffer();
        md5.append(number.toString(16));

        while (md5.length() < 32) {
            //md5 = "0" + md5;
            md5.insert(0, "0");
        }

        return md5.toString();
    } catch (NoSuchAlgorithmException e) {
        Log.e("MD5", e.getMessage());
        return null;
    }
}

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From source file:com.offbynull.peernetic.common.identification.Id.java

/**
 * Constructs a {@link Id} from byte arrays. It's assumed that the byte arrays contain unsigned values and are aligned to byte
 * boundaries (e.g. if you want to use the 6 bits instead of a whole byte (8 bits), make sure the 2 top-most bits are 0).
 * @param data id value// w  w w  .  j av  a  2 s. c o  m
 * @param limit limit value
 * @throws NullPointerException if any argument is {@code null}
 * @throws IllegalArgumentException if {@code data > limit}
 */
public Id(byte[] data, byte[] limit) {
    this(new BigInteger(1, data), new BigInteger(1, limit));
}

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From source file:com.github.ffremont.microservices.springboot.node.tasks.InstallJarTask.java

@Override
public void run(MicroServiceTask task) throws TaskException {
    Path msVersionFolder = helper.targetDirOf(task.getMs());
    Path checksumPath = Paths.get(msVersionFolder.toString(), InstallTask.CHECKSUM_FILE_NAME + ".txt");
    Path jarTarget = helper.targetJarOf(task.getMs());

    try {//w w  w  .j  av a2s. c  o  m
        if (task.getJar() == null) {
            throw new InvalidInstallationException("Jar indisponible dans l'objet MicroServiceTask");
        }

        Files.copy(task.getJar(), jarTarget);
        MessageDigest md = MessageDigest.getInstance("SHA-1");

        try (DigestInputStream digestIs = new DigestInputStream(new FileInputStream(jarTarget.toFile()), md)) {
            byte[] buffer = new byte[10240]; // 10ko
            while (0 < digestIs.read(buffer)) {
            }

            digestIs.close();
        }
        byte[] checksumTarget = md.digest();

        if (!String.format("%032X", new BigInteger(1, checksumTarget))
                .equals(task.getMs().getSha1().toUpperCase())) {
            throw new InvalidInstallationException(
                    "Le checksum n'est pas valide suite  la copie : " + this.nodeBase);
        }

        Files.write(checksumPath, task.getMs().getSha1().getBytes());
        LOG.debug("Cration du fichier checksum.txt");
    } catch (IOException | NoSuchAlgorithmException ex) {
        throw new InvalidInstallationException("Impossible d'installer le jar", ex);
    }
}

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From source file:JavaCloud.Utils.java

public static String calcHash(String password, String seed) {
    try {/*from  ww  w .j a  va 2 s. c o m*/
        MessageDigest crypt = MessageDigest.getInstance("SHA-1");
        crypt.reset();

        String tuple = password + seed;

        crypt.update(tuple.getBytes("UTF-8"));
        return new BigInteger(1, crypt.digest()).toString(16);
    } catch (Exception e) {
        return null;
    }
}

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From source file:com.nirima.jenkins.repo.build.MetadataChecksumRepositoryItem.java

protected String generateContent() {
    try {//from ww w. j  ava2  s .  c om
        MessageDigest md = MessageDigest.getInstance(algorithm.toUpperCase());
        byte[] digest = md.digest(IOUtils.toByteArray(item.getContent()));
        String hex = new BigInteger(1, digest).toString(16);

        // Need to prepend with 0s if not the correct length
        int requiredNumberOfCharacters = md.getDigestLength() * 2;
        while (hex.length() < requiredNumberOfCharacters) {
            hex = "0" + hex;
        }

        return hex;
    } catch (Exception nsae) {
        return "ERROR: " + nsae.getMessage();
    }
}

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From source file:com.google.u2f.TestUtils.java

public static PrivateKey parsePrivateKey(String keyBytesHex) {
    try {/*  www .  j a  v  a 2  s . c  om*/
        KeyFactory fac = KeyFactory.getInstance("ECDSA");
        X9ECParameters curve = SECNamedCurves.getByName("secp256r1");
        ECParameterSpec curveSpec = new ECParameterSpec(curve.getCurve(), curve.getG(), curve.getN(),
                curve.getH());
        ECPrivateKeySpec keySpec = new ECPrivateKeySpec(new BigInteger(keyBytesHex, 16), curveSpec);
        return fac.generatePrivate(keySpec);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    } catch (InvalidKeySpecException e) {
        throw new RuntimeException(e);
    }
}

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