Example usage for java.math BigInteger toByteArray

Introduction

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

Prototype

public byte[] toByteArray() 

Source Link

Document

Returns a byte array containing the two's-complement representation of this BigInteger.

Usage

From source file:org.rifidi.edge.core.services.notification.data.EPCGeneration1Event.java

/**
 * Set the epc memory bank./*from  w ww .  j a v a 2s  .c om*/
 * 
 * @param memBank
 * @param length
 *            The size of the memory bank in bits
 */
public void setEPCMemory(BigInteger memBank, Integer length) {
    hex = new String(Hex.encodeHex(memBank.toByteArray()));
    memoryBanks.get(0).setLength(length);
    memoryBanks.get(0).setMemory(memBank);
}

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From source file:com.trsst.Common.java

public static byte[] fromBase58(String s) {
    try {//w  ww .j  a  va2s . co m
        boolean leading = true;
        int lz = 0;
        BigInteger b = BigInteger.ZERO;
        for (char c : s.toCharArray()) {
            if (leading && c == '1') {
                ++lz;
            } else {
                leading = false;
                b = b.multiply(BigInteger.valueOf(58));
                b = b.add(BigInteger.valueOf(r58[c]));
            }
        }
        byte[] encoded = b.toByteArray();
        if (encoded[0] == 0) {
            if (lz > 0) {
                --lz;
            } else {
                byte[] e = new byte[encoded.length - 1];
                System.arraycopy(encoded, 1, e, 0, e.length);
                encoded = e;
            }
        }
        byte[] result = new byte[encoded.length + lz];
        System.arraycopy(encoded, 0, result, lz, encoded.length);

        return result;
    } catch (ArrayIndexOutOfBoundsException e) {
        throw new IllegalArgumentException("Invalid character in address");
    } catch (Exception e) {
        throw new IllegalArgumentException(e);
    }
}

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From source file:org.openbaton.nfvo.core.api.KeyManagement.java

private String encodePublicKey(RSAPublicKey key, String keyname) throws IOException {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    /* encode the "ssh-rsa" string */
    byte[] sshrsa = new byte[] { 0, 0, 0, 7, 's', 's', 'h', '-', 'r', 's', 'a' };
    out.write(sshrsa);//from  w  w w . j  a  v  a 2 s  .  com
    /* Encode the public exponent */
    BigInteger e = key.getPublicExponent();
    byte[] data = e.toByteArray();
    encodeUInt32(data.length, out);
    out.write(data);
    /* Encode the modulus */
    BigInteger m = key.getModulus();
    data = m.toByteArray();
    encodeUInt32(data.length, out);
    out.write(data);
    return "ssh-rsa " + Base64.encodeBase64String(out.toByteArray()) + " " + keyname;
}

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From source file:cherry.windows.charset.ListCreator.java

public void createList() throws IOException {

    Charset ms932 = Charset.forName("MS932");
    Charset cp943 = Charset.forName("CP943");
    Charset win31j = Charset.forName("Windows-31J");

    System.out.println("WIN\tUNI\tMS932(1)\tMS932(2)\tCP943(1)\tCP943(2)\tWin31J(1)\tWin31J(2)\tCOMMENT");

    List<Entry> list = tableParser.parse("CP932.TXT");
    for (Entry entry : list) {

        System.out.print(entry.getWinCode());
        System.out.print("\t");
        System.out.print(entry.getUniCode());
        System.out.print("\t");

        BigInteger winCode = new BigInteger(entry.getWinCode(), 16);

        BigInteger bi932x1 = new BigInteger((new String(winCode.toByteArray(), ms932)).getBytes(ms932));
        BigInteger bi932x2 = new BigInteger((new String(bi932x1.toByteArray(), ms932)).getBytes(ms932));
        System.out.print(winCode.equals(bi932x1));
        System.out.print("\t");
        System.out.print(bi932x1.equals(bi932x2));
        System.out.print("\t");

        BigInteger bi943x1 = new BigInteger((new String(winCode.toByteArray(), cp943)).getBytes(cp943));
        BigInteger bi943x2 = new BigInteger((new String(bi943x1.toByteArray(), cp943)).getBytes(cp943));
        System.out.print(winCode.equals(bi943x1));
        System.out.print("\t");
        System.out.print(bi943x1.equals(bi943x2));
        System.out.print("\t");

        BigInteger bi31jx1 = new BigInteger((new String(winCode.toByteArray(), win31j)).getBytes(win31j));
        BigInteger bi31jx2 = new BigInteger((new String(bi31jx1.toByteArray(), win31j)).getBytes(win31j));
        System.out.print(winCode.equals(bi31jx1));
        System.out.print("\t");
        System.out.print(bi31jx1.equals(bi31jx2));
        System.out.print("\t");

        System.out.print(entry.getComment());
        System.out.println();//from  w  ww  .  jav  a  2  s  .c  o  m
    }
}

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From source file:org.wso2.carbon.identity.oauth.endpoint.jwks.JwksEndpoint.java

public String base64EncodeUint(final BigInteger v) {

    return base64urlEncode(v.toByteArray());
}

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From source file:com.openvcx.conference.KeyGenerator.java

/**
 * <p>Obtains a sequence of random bytes.</p>
 * <p><i>java.security.SecureRandom</i> is used as the random number generator</p>
 * @param length The length in bytes of the random byte sequence to generate
 * @param algo The algorithm used to hash the random bytes
 * @return The random byte sequence/*  w  ww .  j a v a 2 s .c o  m*/
 */
public byte[] getRandomBytes(int length, String algo) throws NoSuchAlgorithmException {
    int index = 0;
    byte[] randBytes = new byte[length];

    synchronized (m_sync) {

        while (index < length) {
            BigInteger bi = new BigInteger(64, m_rand);
            byte[] b = createHash(bi.toByteArray(), algo);
            //int i; for(i=0; i<b.length; i++) {System.out.printf("0x%02X ", b[i]); }
            int copy = Math.min(length - index, b.length);
            System.arraycopy(b, 0, randBytes, index, copy);
            index += copy;
        }

    }

    return randBytes;
}

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From source file:nl.minvenj.pef.pseudo.IPPseudonymizer.java

private byte[] toIPAddressOfSize(final BigInteger bigInt, final int size) {
    final byte[] bytes = new byte[size];
    final byte[] intBytes = bigInt.toByteArray();

    if (size == intBytes.length) {
        System.arraycopy(intBytes, 0, bytes, 0, size);
    } else if (size < intBytes.length) {
        System.arraycopy(intBytes, intBytes.length - size, bytes, 0, size);
    } else {//from w  w w  .j av  a 2  s.  c o m
        System.arraycopy(intBytes, 0, bytes, size - intBytes.length, intBytes.length);
    }
    return bytes;
}

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

/**
 * Generates a {@link Id}./*from   w  w w . j a  v a  2  s.co  m*/
 * @return a {@link Id} between {@code 0} and {@code limit}
 * @throws NullPointerException if any arguments are {@code null}
 */
public Id generate() {
    try {
        int rawLen = limit.length;
        byte[] raw = new byte[rawLen];
        random.nextBytes(raw);

        BigInteger rawBd = new BigInteger(1, raw);
        BigInteger limitBd = new BigInteger(1, limit);

        rawBd = rawBd.mod(limitBd);

        return new Id(rawBd.toByteArray(), limit);
    } catch (Exception e) {
        throw new IllegalStateException(e);
    }
}

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From source file:org.coinspark.core.CSUtils.java

public static void littleEndianByteArray(BigInteger n, byte[] arr, int off) {
    if (n == null) {
        return;/*from   ww  w  .  j  av  a  2  s .  c  o  m*/
    }
    byte[] k = n.toByteArray();
    for (int i = 0; i < k.length; i++) {
        arr[off + i] = k[k.length - i - 1];
    }
}

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From source file:test.integ.be.fedict.trust.Foreigner201305Test.java

@Test
public void testForeigner201305() throws Exception {
    CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
    X509Certificate rootCert = (X509Certificate) certificateFactory
            .generateCertificate(Foreigner201305Test.class.getResourceAsStream("/belgiumrca2.crt"));
    X509Certificate foreigner201304Cert = (X509Certificate) certificateFactory
            .generateCertificate(Foreigner201305Test.class.getResourceAsStream("/foreigner201304.crt"));

    foreigner201304Cert.verify(rootCert.getPublicKey());

    X509Certificate foreigner201305Cert = (X509Certificate) certificateFactory
            .generateCertificate(Foreigner201305Test.class.getResourceAsStream("/foreigner201305.crt"));

    foreigner201305Cert.verify(rootCert.getPublicKey());

    byte[] foreigner201304SignatureValue = foreigner201304Cert.getSignature();
    byte[] foreigner201305SignatureValue = foreigner201305Cert.getSignature();
    LOG.debug("201304 signature size: " + foreigner201304SignatureValue.length);
    LOG.debug("201305 signature size: " + foreigner201305SignatureValue.length);

    RSAPublicKey rootPublicKey = (RSAPublicKey) rootCert.getPublicKey();

    BigInteger foreigner201304Signature = new BigInteger(foreigner201304SignatureValue);
    BigInteger foreigner201305Signature = new BigInteger(foreigner201305SignatureValue);

    LOG.debug("201305 signature size: " + foreigner201305Signature.toByteArray().length);

    BigInteger foreigner201304PaddedMessage = foreigner201304Signature.modPow(rootPublicKey.getPublicExponent(),
            rootPublicKey.getModulus());
    BigInteger foreigner201305PaddedMessage = foreigner201305Signature.modPow(rootPublicKey.getPublicExponent(),
            rootPublicKey.getModulus());

    LOG.debug(//from  w w w .ja va 2s . co m
            "201304 padded message: " + new String(Hex.encodeHex(foreigner201304PaddedMessage.toByteArray())));
    LOG.debug(
            "201305 padded message: " + new String(Hex.encodeHex(foreigner201305PaddedMessage.toByteArray())));

    LOG.debug("201304 modulus size: "
            + ((RSAPublicKey) foreigner201304Cert.getPublicKey()).getModulus().toByteArray().length);
    LOG.debug("201305 modulus size: "
            + ((RSAPublicKey) foreigner201305Cert.getPublicKey()).getModulus().toByteArray().length);
    LOG.debug("201304 modulus: " + new String(
            Hex.encodeHex(((RSAPublicKey) foreigner201304Cert.getPublicKey()).getModulus().toByteArray())));
    LOG.debug("201305 modulus: " + new String(
            Hex.encodeHex(((RSAPublicKey) foreigner201305Cert.getPublicKey()).getModulus().toByteArray())));
}

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