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:biz.karms.sinkit.ejb.util.CIDRUtils.java

public static ImmutablePair<String, String> getStartEndAddresses(final String cidr)
        throws UnknownHostException {
    //TODO: This is silly. Refactor CIDRUtils so as to accept actual IPs as well as subnets.
    //TODO: Validate the thing before processing. Guava?
    final String fixedCIDR;
    if (!cidr.contains("/")) {
        //IPv6? Hmmm...
        if (cidr.contains(":")) {
            fixedCIDR = cidr + "/128";
        } else {// ww w.ja v a  2  s .c o  m
            fixedCIDR = cidr + "/32";
        }
    } else {
        fixedCIDR = cidr;
    }
    final int index = fixedCIDR.indexOf("/");
    final InetAddress inetAddress = InetAddress.getByName(fixedCIDR.substring(0, index));
    final int prefixLength = Integer.parseInt(fixedCIDR.substring(index + 1));

    final ByteBuffer maskBuffer;
    if (inetAddress.getAddress().length == 4) {
        maskBuffer = ByteBuffer.allocate(4).putInt(-1);
    } else {
        maskBuffer = ByteBuffer.allocate(16).putLong(-1L).putLong(-1L);
    }

    final BigInteger mask = (new BigInteger(1, maskBuffer.array())).not().shiftRight(prefixLength);
    final ByteBuffer buffer = ByteBuffer.wrap(inetAddress.getAddress());
    final BigInteger ipVal = new BigInteger(1, buffer.array());
    final BigInteger startIp = ipVal.and(mask);
    final BigInteger endIp = startIp.add(mask.not());

    return new ImmutablePair<>(String.format("%040d", startIp), String.format("%040d", endIp));
}

From source file:springmvc.service.PersonServiceImpl.java

public String generate() {
    SecureRandom random = new SecureRandom();
    String pw = new BigInteger(130, random).toString(32);
    return pw.substring(0, 10);

}

From source file:de.upb.wdqa.wdvd.revisiontags.SHA1Converter.java

private static String getBase(int base, byte[] bytes) {
    String result;/*  w ww . j a v  a  2s. c  o  m*/

    if (bytes != null) {
        if (bytes.length != 0) {
            BigInteger bi = new BigInteger(1, bytes);
            String tmp = bi.toString(base);

            int numberOfDigits = (int) Math.ceil(160.0 / (Math.log(base) / Math.log(2.0)));

            result = StringUtils.leftPad(tmp, numberOfDigits, '0');
        } else {
            result = "";
        }
    } else {
        result = null;
    }

    return result;
}

From source file:camera.Camera.java

public Camera() throws MqttException, SocketException {
    System.out.println("Log4J: " + HoraFile.getCanonicalPath(LOG4J));
    System.out.println("Ini:   " + HoraFile.getCanonicalPath(INI));
    DOMConfigurator.configureAndWatch(LOG4J, 10 * 1000);
    MQTTLINK = HoraIni.LeseIniString(INI, "MQTT", "LINK_PORT", MQTTLINK, true);
    MQTTLINK = "tcp://" + MQTTLINK;
    ////  w w  w .j  a v a  2  s.c  o  m
    this.mac = TestMac.getMacAddress("wlan");
    MemoryPersistence persistence = new MemoryPersistence();
    SecureRandom random = new SecureRandom();
    String id = new BigInteger(60, random).toString(32);
    System.out.println("camid=" + id);
    client = new MqttClient(MQTTLINK, id, persistence);
    client.setTimeToWait(5000);
}

From source file:com.github.badoualy.badoualyve.GameEngine.java

public User generateNewUser(String name) {
    User user = new User();
    user.name = getFreeName(name);/*from  www.  j av  a2s  .com*/
    user.token = new BigInteger(130, random).toString(32).replace(" ", "");

    user.attack = 100 + random.nextInt(50);
    user.defense = 100 + random.nextInt(50);
    user.speed = 100 + random.nextInt(30);
    user.hp = 1000 + random.nextInt(200);
    user.lastUpdateTime = System.currentTimeMillis();

    userList.add(user);
    return user;
}

From source file:edu.mit.media.funf.HashUtil.java

public static String oneWayHashString(String msg) {
    MessageDigest md = getMessageDigest();
    synchronized (md) {
        if (msg == null || "".equals(msg)) {
            return "";
        } else if (md == null) {
            return "NO SHA";
        } else {/*  w  w  w.j  a  v a 2  s .c om*/
            byte[] msgDigest = md.digest(msg.getBytes());
            BigInteger number = new BigInteger(1, msgDigest);
            return number.toString(16);
        }
    }
}

From source file:de.u808.common.MD5Util.java

/**
 * Creates MD5 Hex String for the input.  
 * //from w  w w .j a  va  2  s .c o  m
 * @param s The string to create the hash for.
 * @return The MD5 Hex String for the input string.
 */
public String getMD5Hex(String s) {
    md.update(s.getBytes(), 0, s.length());
    String md5Hex = new BigInteger(1, md.digest()).toString(16);
    md.reset();
    return md5Hex;
}

From source file:net.sf.keystore_explorer.utilities.io.HexUtil.java

/**
 * Get hex string for the supplied byte array: "0x<hex string>" where hex
 * string is outputted in groups of exactly four characters sub-divided by
 * spaces.//  www  .j a  v a  2s  . c o  m
 *
 * @param bytes
 *            Byte array
 * @return Hex string
 */
public static String getHexString(byte[] bytes) {
    return getHexString(new BigInteger(1, bytes));
}

From source file:com.jim.im.offline.repo.MessageConverter.java

private static Object getValue(Field field, Object sourceValue) {
    if (sourceValue == null)
        return null;

    if (field.getType() == MsgType.class) {
        return MsgType.valueOf(sourceValue.toString());
    } else if (field.getType() == TopicOwnerType.class) {
        return TopicOwnerType.valueOf(sourceValue.toString());
    } else if (field.getType() == BigInteger.class) {
        return new BigInteger(sourceValue.toString(), 16);
    }// w ww. ja  va2 s. co m
    return sourceValue;
}

From source file:com.google.wolff.androidhunt.Hunt.java

/** Returns the singleton hunt object, and initializes it if it's not ready. */
public static Hunt getHunt(Resources res, Context context) {

    if (theHunt == null) {

        hrm = new HuntResourceManager();
        hrm.unzipFile(res);//from w ww  . java2  s  . co  m

        theHunt = new Hunt(hrm.huntJSON, res, context);
        String android_id = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID);

        if (android_id == null) {
            // Fall back on devices where ANDROID_ID is not reliable.
            theHunt.shuffle(Integer.parseInt(Settings.Secure.ANDROID_ID, 0));
        } else {
            BigInteger bi = new BigInteger(android_id, 16);
            System.out.println(bi);

            theHunt.shuffle(bi.shortValue());
        }
    }

    return theHunt;
}