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.opendaylight.aaa.cert.impl.ODLKeyTool.java

private BigInteger getSecureRandomeInt() {
    final SecureRandom secureRandom = new SecureRandom();
    final BigInteger bigInt = BigInteger.valueOf(secureRandom.nextInt());
    return new BigInteger(1, bigInt.toByteArray());
}

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From source file:mx.bigdata.sat.cfdi.TFDv1_v32.java

private TimbreFiscalDigital createStamp(UUID uuid, Date date) {
    ObjectFactory of = new ObjectFactory();
    TimbreFiscalDigital tfd = of.createTimbreFiscalDigital();
    tfd.setVersion("1.0");
    tfd.setFechaTimbrado(date);/*from w ww  .ja va2 s  .  co m*/
    tfd.setSelloCFD(document.getSello());
    tfd.setUUID(uuid.toString().toUpperCase()); ///-----------------CAMBIADO A MAYUSCULAS
    BigInteger bi = cert.getSerialNumber();
    tfd.setNoCertificadoSAT(new String(bi.toByteArray()));
    return tfd;
}

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From source file:test.unit.be.fedict.hsm.entity.KeyStoreSingletonBeanTest.java

@Test
public void testSignature() throws Exception {
    EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("test");
    EntityManager entityManager = entityManagerFactory.createEntityManager();

    EntityTransaction entityTransaction = entityManager.getTransaction();
    entityTransaction.begin();//from ww w. ja v a2  s .  c o  m

    KeyStoreEntity keyStoreEntity = new KeyStoreEntity("test", KeyStoreType.PKCS12,
            KeyStoreSingletonBeanTest.class.getResource("/keystore.p12").toURI().getPath(), "secret");
    entityManager.persist(keyStoreEntity);

    KeyStoreSingletonBean keyStoreSingletonBean = new KeyStoreSingletonBean();

    Field entityManagerField = KeyStoreSingletonBean.class.getDeclaredField("entityManager");
    entityManagerField.setAccessible(true);
    entityManagerField.set(keyStoreSingletonBean, entityManager);

    KeyStoreLoaderBean keyStoreLoaderBean = new KeyStoreLoaderBean();
    Field keyStoreLoaderField = KeyStoreSingletonBean.class.getDeclaredField("keyStoreLoader");
    keyStoreLoaderField.setAccessible(true);
    keyStoreLoaderField.set(keyStoreSingletonBean, keyStoreLoaderBean);

    keyStoreSingletonBean.loadKeys();

    keyStoreSingletonBean.newKeyStore(keyStoreEntity.getId());

    byte[] toBeSigned = "hello world".getBytes();
    MessageDigest messageDigest = MessageDigest.getInstance("SHA1");
    messageDigest.update(toBeSigned);
    byte[] digestValue = messageDigest.digest();
    LOG.debug("digest value: " + new String(Hex.encodeHex(digestValue)));
    byte[] signatureValue = keyStoreSingletonBean.sign(keyStoreEntity.getId(), "alias", "SHA-1", digestValue);

    assertNotNull(signatureValue);
    LOG.debug("signature size: " + signatureValue.length);

    KeyStore keyStore = KeyStore.getInstance("PKCS12");
    keyStore.load(KeyStoreSingletonBeanTest.class.getResourceAsStream("/keystore.p12"), "secret".toCharArray());
    RSAPublicKey publicKey = (RSAPublicKey) keyStore.getCertificate("alias").getPublicKey();

    BigInteger signatureValueBigInteger = new BigInteger(signatureValue);
    BigInteger originalBigInteger = signatureValueBigInteger.modPow(publicKey.getPublicExponent(),
            publicKey.getModulus());
    LOG.debug("original message: " + new String(Hex.encodeHex(originalBigInteger.toByteArray())));

    Signature signature = Signature.getInstance("SHA1withRSA");
    signature.initVerify(publicKey);
    signature.update(toBeSigned);
    boolean result = signature.verify(signatureValue);
    assertTrue(result);
}

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From source file:com.cellngine.crypto.RSACipher.java

private byte[] encode(final BigInteger modulus, final BigInteger exponent) {
    final byte[] modulusEnc = modulus.toByteArray();
    final byte[] exponentEnc = exponent.toByteArray();
    final ByteBuffer buffer = ByteBuffer.allocate(2 * 4 + modulusEnc.length + exponentEnc.length);
    buffer.putInt(modulusEnc.length);//from  w  w  w. ja v a 2s.com
    buffer.put(modulusEnc);
    buffer.putInt(exponentEnc.length);
    buffer.put(exponentEnc);
    return buffer.array();
}

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From source file:mx.bigdata.sat.cfd.CFDv2.java

public void sellar(PrivateKey key, X509Certificate cert) throws Exception {
    cert.checkValidity();//from w w  w  . ja  v a2  s.co m
    String signature = getSignature(key);
    document.setSello(signature);
    byte[] bytes = cert.getEncoded();
    Base64 b64 = new Base64(-1);
    String certStr = b64.encodeToString(bytes);
    document.setCertificado(certStr);
    BigInteger bi = cert.getSerialNumber();
    document.setNoCertificado(new String(bi.toByteArray()));
}

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From source file:Base64.java

/**
 * Returns a byte-array representation of a <code>BigInteger</code> without sign bit.
 *
 * @param bigInt <code>BigInteger</code> to be converted
 * @return a byte array representation of the BigInteger parameter
 *//*from w  w w  .  ja  v a 2  s  . c o  m*/
static byte[] toIntegerBytes(BigInteger bigInt) {
    int bitlen = bigInt.bitLength();
    // round bitlen
    bitlen = ((bitlen + 7) >> 3) << 3;
    byte[] bigBytes = bigInt.toByteArray();

    if (((bigInt.bitLength() % 8) != 0) && (((bigInt.bitLength() / 8) + 1) == (bitlen / 8))) {
        return bigBytes;
    }
    // set up params for copying everything but sign bit
    int startSrc = 0;
    int len = bigBytes.length;

    // if bigInt is exactly byte-aligned, just skip signbit in copy
    if ((bigInt.bitLength() % 8) == 0) {
        startSrc = 1;
        len--;
    }
    int startDst = bitlen / 8 - len; // to pad w/ nulls as per spec
    byte[] resizedBytes = new byte[bitlen / 8];
    System.arraycopy(bigBytes, startSrc, resizedBytes, startDst, len);
    return resizedBytes;
}

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From source file:com.swdouglass.joid.DiffieHellman.java

/**
 * Returns the shared secret SHA-1 hashed and XOR 'encrypted'.
 *
 * @param otherPublic the other party's public modulus; cannot be null.
 * @param secret the key to XOR encrypt with.
 * @return the encrypted secret.//www  .  j  a v a  2s.co m
 * @throws IllegalArgumentException if <code>otherPublic</code> is null.
 * @throws RuntimeException if length of <code>secret</code> is
 * incorrect. Big TODO here to make this error reporting better.
 */
public byte[] xorSecret(BigInteger otherPublic, byte[] secret) throws NoSuchAlgorithmException {
    if (otherPublic == null) {
        throw new IllegalArgumentException("otherPublic cannot be null");
    }

    BigInteger shared = getSharedSecret(otherPublic);
    byte[] hashed;
    if (secret.length == 32) {
        hashed = Crypto.sha256(shared.toByteArray());
    } else {
        hashed = Crypto.sha1(shared.toByteArray());
    }

    if (secret.length != hashed.length) {
        log.warn("invalid secret byte[] length: secret=" + secret.length + ", hashed=" + hashed.length);
        throw new RuntimeException("nyi");
    }

    byte[] result = new byte[secret.length];
    for (int i = 0; i < result.length; i++) {
        result[i] = (byte) (hashed[i] ^ secret[i]);
    }
    return result;
}

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From source file:org.apache.hama.util.Bytes.java

/**
 * Split passed range. Expensive operation relatively. Uses BigInteger math.
 * // www  . ja  va  2s.  c o m
 * @param a Beginning of range
 * @param b End of range
 * @param num Number of times to split range. Pass 1 if you want to split the
 *          range in two; i.e. one split.
 * @return Array of dividing values
 */
public static byte[][] split(final byte[] a, final byte[] b, final int num) {
    byte[] aPadded;
    byte[] bPadded;
    if (a.length < b.length) {
        aPadded = padTail(a, b.length - a.length);
        bPadded = b;
    } else if (b.length < a.length) {
        aPadded = a;
        bPadded = padTail(b, a.length - b.length);
    } else {
        aPadded = a;
        bPadded = b;
    }
    if (compareTo(aPadded, bPadded) >= 0) {
        throw new IllegalArgumentException("b <= a");
    }
    if (num <= 0) {
        throw new IllegalArgumentException("num cannot be < 0");
    }
    byte[] prependHeader = { 1, 0 };
    BigInteger startBI = new BigInteger(add(prependHeader, aPadded));
    BigInteger stopBI = new BigInteger(add(prependHeader, bPadded));
    BigInteger diffBI = stopBI.subtract(startBI);
    BigInteger splitsBI = BigInteger.valueOf(num + 1);
    if (diffBI.compareTo(splitsBI) < 0) {
        return null;
    }
    BigInteger intervalBI;
    try {
        intervalBI = diffBI.divide(splitsBI);
    } catch (Exception e) {
        LOG.error("Exception caught during division", e);
        return null;
    }

    byte[][] result = new byte[num + 2][];
    result[0] = a;

    for (int i = 1; i <= num; i++) {
        BigInteger curBI = startBI.add(intervalBI.multiply(BigInteger.valueOf(i)));
        byte[] padded = curBI.toByteArray();
        if (padded[1] == 0)
            padded = tail(padded, padded.length - 2);
        else
            padded = tail(padded, padded.length - 1);
        result[i] = padded;
    }
    result[num + 1] = b;
    return result;
}

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From source file:test.be.fedict.eid.applet.PKCS11Test.java

@Test
public void testPKCS1viaPKCS11() throws Exception {
    File tmpConfigFile = File.createTempFile("pkcs11-", "conf");
    tmpConfigFile.deleteOnExit();//  www  .  j  av a  2 s  .  c o m
    PrintWriter configWriter = new PrintWriter(new FileOutputStream(tmpConfigFile), true);
    configWriter.println("name=SmartCard");
    configWriter.println("library=/usr/lib/libbeidpkcs11.so.0");
    configWriter.println("slotListIndex=2");

    SunPKCS11 provider = new SunPKCS11(tmpConfigFile.getAbsolutePath());
    Security.addProvider(provider);
    KeyStore keyStore = KeyStore.getInstance("PKCS11", provider);
    keyStore.load(null, null);
    PrivateKeyEntry privateKeyEntry = (PrivateKeyEntry) keyStore.getEntry("Authentication", null);
    PrivateKey privateKey = privateKeyEntry.getPrivateKey();
    Signature signature = Signature.getInstance("SHA1withRSA");
    signature.initSign(privateKey);
    byte[] toBeSigned = "hello world".getBytes();
    signature.update(toBeSigned);
    byte[] signatureValue = signature.sign();

    X509Certificate certificate = (X509Certificate) privateKeyEntry.getCertificate();
    RSAPublicKey publicKey = (RSAPublicKey) certificate.getPublicKey();
    BigInteger signatureValueBigInteger = new BigInteger(signatureValue);
    BigInteger messageBigInteger = signatureValueBigInteger.modPow(publicKey.getPublicExponent(),
            publicKey.getModulus());
    LOG.debug("original message: " + new String(Hex.encodeHex(messageBigInteger.toByteArray())));

    // LOG.debug("ASN.1 signature: " + ASN1Dump.dumpAsString(obj)
}

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From source file:org.gluu.com.ox_push2.u2f.v2.cert.KeyPairGeneratorImpl.java

public String keyPairToJson(KeyPair keyPair) throws U2FException {
    ECPrivateKey privateKey = (ECPrivateKey) keyPair.getPrivate();
    ECPublicKey publicKey = (ECPublicKey) keyPair.getPublic();

    BigInteger x = publicKey.getQ().getAffineXCoord().toBigInteger();
    BigInteger y = publicKey.getQ().getAffineYCoord().toBigInteger();
    BigInteger d = privateKey.getD();

    try {/*from  w w w  . j ava  2 s.  com*/
        JSONObject jsonPrivateKey = new JSONObject();
        jsonPrivateKey.put("d", Utils.encodeHexString(d.toByteArray()));

        JSONObject jsonPublicKey = new JSONObject();
        jsonPublicKey.put("x", Utils.encodeHexString(x.toByteArray()));
        jsonPublicKey.put("y", Utils.encodeHexString(y.toByteArray()));

        JSONObject jsonKeyPair = new JSONObject();
        jsonKeyPair.put("privateKey", jsonPrivateKey);
        jsonKeyPair.put("publicKey", jsonPublicKey);

        String keyPairJson = jsonKeyPair.toString();

        if (BuildConfig.DEBUG)
            Log.d(TAG, "JSON key pair: " + keyPairJson);

        return keyPairJson;
    } catch (JSONException ex) {
        throw new U2FException("Failed to serialize key pair to JSON", ex);
    }
}

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