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.appzone.sim.services.handlers.PhoneRegistrationServiceHandler.java

public String getMD5(String input) {
    try {//  w w w.  j  a va  2  s .c o  m
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] messageDigest = md.digest(input.getBytes());
        BigInteger number = new BigInteger(1, messageDigest);
        String hashtext = number.toString(16);
        // Now we need to zero pad it if you actually want the full 32
        // chars.
        while (hashtext.length() < 32) {
            hashtext = "0" + hashtext;
        }
        return hashtext;
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
}

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From source file:com.artivisi.iso8583.Processor.java

public Message stringToMessage(String stream) {
    LOGGER.debug("[STRING2MESSAGE] : [{}]", stream);
    if (stream == null || stream.trim().length() < MTI_LENGTH + BITMAP_LENGTH) {
        LOGGER.error("[STRING2MESSAGE] : Invalid Message [{}]", stream);
        throw new IllegalArgumentException("Invalid Message : [" + stream + "]");
    }//from   w  ww  . j a v  a2  s.  c  om

    int currentPosition = 0;

    Message m = new Message();
    m.setMti(stream.substring(0, MTI_LENGTH));

    currentPosition += MTI_LENGTH;

    String primaryBitmapStream = stream.substring(currentPosition, currentPosition + BITMAP_LENGTH);
    m.setPrimaryBitmapStream(primaryBitmapStream);
    currentPosition += BITMAP_LENGTH;

    LOGGER.debug("[STRING2MESSAGE] : Primary Bitmap Hex : [{}]", primaryBitmapStream);

    String primaryBitmapBinary = new BigInteger(primaryBitmapStream, HEXADECIMAL).toString(BINARY);
    LOGGER.debug("[STRING2MESSAGE] : Primary Bitmap Bin : [{}]", primaryBitmapBinary);

    if (m.isDataElementPresent(1)) {
        String secondaryBitmapStream = stream.substring(currentPosition, currentPosition + BITMAP_LENGTH);
        LOGGER.debug("[STRING2MESSAGE] : Secondary Bitmap Hex : [{}]", secondaryBitmapStream);
        m.setSecondaryBitmapStream(secondaryBitmapStream);
        currentPosition += BITMAP_LENGTH;
    }

    // mulai dari 2, karena bitmap tidak diparsing
    for (int i = 2; i <= NUMBER_OF_DATA_ELEMENT; i++) {
        if (!m.isDataElementPresent(i)) {
            continue;
        }

        DataElement de = mapper.getDataElement().get(i);
        if (de == null) {
            LOGGER.error("[STRING2MESSAGE] - [DATA ELEMENT {}] : Not configured", i);
            throw new IllegalStateException("Invalid Mapper, Data Element [" + i + "] not configured");
        }

        if (DataElementLength.FIXED.equals(de.getLengthType())) {
            if (de.getLength() == null || de.getLength() < 1) {
                LOGGER.error(
                        "[STRING2MESSAGE] - [DATA ELEMENT {}] : Length not configured for fixed length element",
                        i);
                throw new IllegalStateException("Invalid Mapper, Data Element [" + i
                        + "] length not configured for fixed length element");
            }

            String data = stream.substring(currentPosition, currentPosition + de.getLength());
            m.getDataElementContent().put(i, data);
            LOGGER.debug("[STRING2MESSAGE] - [DATA ELEMENT {}] : [{}]", i, data);
            currentPosition += de.getLength();
            continue;
        }

        if (DataElementLength.VARIABLE.equals(de.getLengthType())) {
            if (de.getLengthPrefix() == null || de.getLengthPrefix() < 1) {
                LOGGER.error(
                        "[STRING2MESSAGE] - [DATA ELEMENT {}] : Length prefix not configured for variable length element",
                        i);
                throw new IllegalStateException("Invalid Mapper, Data Element [" + i
                        + "] length prefix not configured for variable length element");
            }

            String strLength = stream.substring(currentPosition, currentPosition + de.getLengthPrefix());
            currentPosition += de.getLengthPrefix();
            try {
                Integer length = Integer.parseInt(strLength);
                String data = stream.substring(currentPosition, currentPosition + length);
                m.getDataElementContent().put(i, data);
                LOGGER.debug("[STRING2MESSAGE] - [DATA ELEMENT {}] : [{}]", i, data);
                currentPosition += length;
                continue;
            } catch (NumberFormatException err) {
                LOGGER.error("[STRING2MESSAGE] - [DATA ELEMENT {}] : Length prefix [{}] cannot be parsed",
                        new Object[] { i, strLength });
                throw err;
            }
        }

        LOGGER.error("[STRING2MESSAGE] - [DATA ELEMENT {}] : Length type [{}] not fixed nor variable",
                new Object[] { i, de.getLengthType() });
        throw new IllegalStateException("Invalid Mapper, Data Element [" + i + "] length type ["
                + de.getLengthType() + "] not fixed nor variable");
    }

    return m;
}

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From source file:com.comcast.cmb.common.util.AuthUtil.java

public static boolean verifyPassword(String password, String hashedPassword) throws Exception {

    MessageDigest digest = MessageDigest.getInstance("MD5");

    byte[] hashedBytes = new BigInteger(hashedPassword, 16).toByteArray();

    String salt = new String(hashedBytes, 0, 4);
    String toBeHashed = salt + password;

    byte[] hashed = digest.digest(toBeHashed.getBytes("UTF-8"));

    for (int i = 0; i < hashed.length; i++) {
        if (hashed[i] != hashedBytes[i + 4]) {
            return false;
        }/*from www .j a v  a  2  s .  c  om*/
    }

    return true;
}

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From source file:fi.vm.kapa.identification.service.PhaseIdService.java

/**
 * Creates new standard length token ID that is used to calculate
 * the phase ID./*  w  ww .  ja  va 2s  .  c o m*/
 *
 * @return New token ID as alphanumeric string
 */
public String nextTokenId() {
    String token = new BigInteger(130, new SecureRandom()).toString(32);
    while (token.length() != TID_LENGTH) {
        token = new BigInteger(130, new SecureRandom()).toString(32);
    }
    return token;
}

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From source file:com._64bitlabs.util.Encryptors.java

/**
 * Generates random salt string//from   ww w  .j  ava2  s . c o m
 * @return random salt string
 */
public static String nextSalt() {
    SecureRandom random = new SecureRandom();
    return new BigInteger(130, random).toString(32);
}

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From source file:br.ufrn.fonoweb.service.ArquivoService.java

public String getEncodedFileName(String originalFile, byte[] contents) {
    MessageDigest md = null;//  w w w . j  a  va2s .c  o m
    String result = null;
    try {
        md = MessageDigest.getInstance("SHA-256");
        md.update(contents);
        result = new BigInteger(1, md.digest()).toString(16);
    } catch (NoSuchAlgorithmException ex) {
        Logger.getLogger(ArquivoService.class.getName()).log(Level.SEVERE, null, ex);
        return null;
    }
    result = result.concat(".").concat(FilenameUtils.getExtension(originalFile));
    return result;
}

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From source file:org.marietjedroid.connect.MarietjeMessenger.java

/**
 * Generates a new token/*from  ww w .  j a v  a  2 s .c o  m*/
 * 
 * @return a new token
 */
protected static String generateToken() {
    SecureRandom random = new SecureRandom();
    while (true) {
        String attempt = new BigInteger(130, random).toString();
        attempt = new String(org.apache.commons.codec.binary.Base64.encodeBase64(attempt.getBytes()))
                .substring(0, 7);

        return attempt;
    }
}

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From source file:com.khipu.lib.java.KhipuService.java

private static String byteArrayToString(byte[] data) {
    BigInteger bigInteger = new BigInteger(1, data);
    String hash = bigInteger.toString(16);
    while (hash.length() < 64) {
        hash = "0" + hash;
    }/*from   w w  w .  ja v a 2s  . c  om*/
    return hash;
}

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From source file:com.exalttech.trex.packets.TrexEthernetPacket.java

/**
 *
 * @param builder/*from www . j  a  v a2  s.  c o  m*/
 */
public void buildPacket(AbstractPacket.AbstractBuilder builder) {

    if (builder == null) {

        this.type = EtherType.getInstance((short) 0xFFFF);
    }

    ethernetBuilder = new EthernetPacket.Builder();
    ethernetBuilder.dstAddr(dstAddr).srcAddr(srcAddr).type(type).payloadBuilder(builder);

    byte[] pad;
    if (builder == null || addPad) {

        if (payload != null) {
            String payloadString = payload.getPayloadType().getPadPayloadString(payload.getPayloadPattern(),
                    100000);
            pad = new BigInteger(payloadString, 16).toByteArray();
        } else {
            pad = new byte[0];
        }

        ethernetBuilder.paddingAtBuild(false).pad(pad);
        this.packet = ethernetBuilder.build();
        fixPacketLength();
    } else {
        ethernetBuilder.paddingAtBuild(true);
        this.packet = ethernetBuilder.build();
    }
}

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From source file:com.vmware.identity.openidconnect.client.TestUtils.java

static X509Certificate generateCertificate(KeyPair keyPair, String dn, String subjectAltName) throws Exception {
    ContentSigner sigGen = new JcaContentSignerBuilder("SHA1withRSA").build(keyPair.getPrivate());

    Date startDate = new Date(System.currentTimeMillis() - 24 * 60 * 60 * 1000);
    Date endDate = new Date(System.currentTimeMillis() + 365 * 24 * 60 * 60 * 1000);

    X509v3CertificateBuilder v3CertGen = new JcaX509v3CertificateBuilder(new X500Name("CN=" + dn),
            new BigInteger(64, new SecureRandom()), startDate, endDate, new X500Name("CN=" + dn),
            keyPair.getPublic());/*from w w w .  j a  v  a  2s . c  om*/
    if (subjectAltName != null) {
        v3CertGen
                .addExtension(Extension.subjectAlternativeName, true,
                        new GeneralNames(new GeneralName(GeneralName.otherName,
                                new DERSequence(new ASN1Encodable[] {
                                        new DERObjectIdentifier("1.3.6.1.4.1.311.20.2.3"),
                                        new DERTaggedObject(true, 0, new DERUTF8String(subjectAltName)) }))));
    }

    X509CertificateHolder certHolder = v3CertGen.build(sigGen);
    X509Certificate x509Certificate = new JcaX509CertificateConverter().getCertificate(certHolder);
    return x509Certificate;
}

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