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:co.rsk.validators.BlockTxsValidationRule.java

@Override
public boolean isValid(Block block, Block parent) {
    if (block == null || parent == null) {
        return false;
    }/* w  ww  .jav a 2 s . co m*/

    List<Transaction> txs = block.getTransactionsList();
    if (CollectionUtils.isEmpty(txs))
        return true;

    Repository parentRepo = repository.getSnapshotTo(parent.getStateRoot());

    Map<ByteArrayWrapper, BigInteger> curNonce = new HashMap<>();

    for (Transaction tx : txs) {
        byte[] txSender = tx.getSender();
        ByteArrayWrapper key = new ByteArrayWrapper(txSender);
        BigInteger expectedNonce = curNonce.get(key);
        if (expectedNonce == null) {
            expectedNonce = parentRepo.getNonce(txSender);
        }
        curNonce.put(key, expectedNonce.add(ONE));
        BigInteger txNonce = new BigInteger(1, tx.getNonce());

        if (!expectedNonce.equals(txNonce)) {
            logger.error("Invalid transaction: Tx nonce {} != expected nonce {} (parent nonce: {}): {}",
                    txNonce, expectedNonce, parentRepo.getNonce(txSender), tx);

            panicProcessor.panic("invalidtransaction",
                    String.format(
                            "Invalid transaction: Tx nonce %s != expected nonce %s (parent nonce: %s): %s",
                            txNonce.toString(), expectedNonce.toString(),
                            parentRepo.getNonce(txSender).toString(), Hex.toHexString(tx.getHash())));

            return false;
        }
    }

    return true;
}

---

From source file:jsave.Utils.java

private static BigInteger read_uint64(final RandomAccessFile raf) throws IOException {
    byte[] data = new byte[8];
    raf.read(data);/*w  w w . jav a2s.  c om*/
    return new BigInteger(1, data);
}

---

From source file:net.sf.keystore_explorer.crypto.digest.DigestUtil.java

/**
 * Get the digest of a message as a formatted String. Returned in base-16
 * with ':' separators every two characters padded with a leading 0 if
 * necessary to make for an even number of hex characters.
 *
 * @param message/*w  ww .  j a  v  a2s . c  o m*/
 *            The message to digest
 * @param digestType
 *            The message digest algorithm
 * @return The message digest
 * @throws CryptoException
 *             If message digester could not be created
 */
public static String getFriendlyMessageDigest(byte[] message, DigestType digestType) throws CryptoException {
    byte[] messageDigest = getMessageDigest(message, digestType);

    StringBuffer strBuff = new StringBuffer(new BigInteger(1, messageDigest).toString(16).toUpperCase());

    if ((strBuff.length() % 2) == 1) {
        strBuff.insert(0, '0');
    }

    if (strBuff.length() > 2) {
        for (int i = 2; i < strBuff.length(); i += 3) {
            strBuff.insert(i, ':');
        }
    }

    return strBuff.toString();
}

---

From source file:ac.elements.parser.SimpleDBConverter.java

/**
 * Decodes zero-padded positive long value from the string representation
 * /*w w  w . j a  va  2s . c om*/
 * com.xerox.amazonws.sdb.DataUtils
 * 
 * @param value
 *            zero-padded string representation of the long
 * @return original long value
 */
private static long decodeLong(String value) {
    BigInteger bi = new BigInteger(value, RADIX);
    bi = bi.add(BigInteger.valueOf(Long.MIN_VALUE));
    return bi.longValue();
}

---

From source file:com.jaspersoft.jasperserver.jaxrs.client.core.EncryptionUtils.java

private static PublicKey getPublicKey(String n, String e) throws Exception {
    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
    int radix = 16;
    BigInteger modulus = new BigInteger(n, radix);
    BigInteger publicExponent = new BigInteger(e, radix);
    RSAPublicKeySpec publicKeySpec = new RSAPublicKeySpec(modulus, publicExponent);
    return keyFactory.generatePublic(publicKeySpec);
}

---

From source file:Pusher.java

/**
 * Returns a HMAC/SHA256 representation of the given string
 * @param data/* w  w w. ja  v a  2s  . c o m*/
 * @return
 */
private static String hmacsha256Representation(String data) {
    try {
        // Create the HMAC/SHA256 key from application secret
        final SecretKeySpec signingKey = new SecretKeySpec(pusherApplicationSecret.getBytes(), "HmacSHA256");

        // Create the message authentication code (MAC)
        final Mac mac = Mac.getInstance("HmacSHA256");
        mac.init(signingKey);

        //Process and return data
        byte[] digest = mac.doFinal(data.getBytes("UTF-8"));
        digest = mac.doFinal(data.getBytes());
        //Convert to string
        BigInteger bigInteger = new BigInteger(1, digest);
        return String.format("%0" + (digest.length << 1) + "x", bigInteger);
    } catch (NoSuchAlgorithmException nsae) {
        //We should never come here, because GAE has HMac SHA256
        throw new RuntimeException("No HMac SHA256 algorithm");
    } catch (UnsupportedEncodingException e) {
        //We should never come here, because UTF-8 should be available
        throw new RuntimeException("No UTF-8");
    } catch (InvalidKeyException e) {
        throw new RuntimeException("Invalid key exception while converting to HMac SHA256");
    }
}

---

From source file:database.DBAccountManager.java

private static String hashPassword(String password) {
    String digest;/*from w w w .  ja  va 2  s .  co m*/
    try {
        MessageDigest md = MessageDigest.getInstance("md5");
        md.reset();
        byte[] bytes = md.digest(password.getBytes());
        digest = new BigInteger(1, bytes).toString(16);
    } catch (NoSuchAlgorithmException nsae) {
        nsae.printStackTrace();
        digest = null;
    }
    return digest;
}

---

From source file:mitm.common.util.MiscArrayUtils.java

/**
 * Converts the input string which is encoded in MAX_RADIX to a byte array (this function 
 * is the complement of ArrayUtils#toMaxRadix) 
 *//*from   w w  w.  j a v  a2 s. c o m*/
public static byte[] fromMaxRadix(String inputMaxRadix) {
    Check.notNull(inputMaxRadix, "inputMaxRadix");

    BigInteger bigInt = new BigInteger(inputMaxRadix, Character.MAX_RADIX);

    byte[] bytes = bigInt.toByteArray();

    /*
     * We need to remove the first byte added by toMaxRadix.
     */
    return ArrayUtils.subarray(bytes, 1, bytes.length);
}

---

From source file:com.orchestra.portale.externalauth.FbAuthenticationManager.java

public static User fbLoginJs(HttpServletRequest request, HttpServletResponse response,
        UserRepository userRepository) {

    //Get access_token from request
    String access_token = request.getParameter("access_token");
    User user = null;// w  w  w.  j  a  v  a  2s  . co m

    if (StringUtils.isNotEmpty(access_token)) {

        try {

            Boolean validity = FacebookUtils.ifTokenValid(access_token);

            //if token is valid, retrieve userid and email from Facebook
            if (validity) {
                Map<String, String> userId_mail = FacebookUtils.getUserIDMail(access_token);
                String id = userId_mail.get("id");
                String email = userId_mail.get("email");

                try {
                    user = fbUserCheck(id, email, userRepository);
                } catch (UserNotFoundException ioex) {
                    /*Retrieve User Data to Registration*/
                    Map<String, String> userData = FacebookUtils.getUserData(access_token);

                    /*Create User*/
                    com.orchestra.portale.persistence.sql.entities.User new_user = new com.orchestra.portale.persistence.sql.entities.User();
                    new_user.setFbEmail(userData.get("email"));
                    new_user.setFbUser(userData.get("id"));
                    new_user.setUsername(userData.get("email"));
                    new_user.setFirstName(userData.get("firstName"));
                    new_user.setLastName(userData.get("lastName"));
                    new_user.setPassword(new BigInteger(130, new SecureRandom()).toString(32));

                    /*Create Role*/
                    com.orchestra.portale.persistence.sql.entities.Role new_user_role = new com.orchestra.portale.persistence.sql.entities.Role();
                    new_user_role.setRole("ROLE_USER");
                    new_user_role.setUser(new_user);
                    ArrayList<com.orchestra.portale.persistence.sql.entities.Role> new_user_roles = new ArrayList<com.orchestra.portale.persistence.sql.entities.Role>();
                    new_user_roles.add(new_user_role);
                    new_user.setRoles(new_user_roles);

                    /*Save User*/
                    userRepository.save(new_user);

                    //Save user image
                    try {
                        String img_url = userData.get("img");
                        String user_id_img = userRepository.findByUsername(new_user.getUsername()).getId()
                                .toString();

                        HttpSession session = request.getSession();
                        ServletContext sc = session.getServletContext();

                        String destination = sc.getRealPath("/") + "dist" + File.separator + "user"
                                + File.separator + "img" + File.separator + user_id_img + File.separator;

                        NetworkUtils.saveImageFromURL(img_url, destination, "avatar.jpg");

                    } catch (MalformedURLException ex) {
                        throw new FacebookException();
                    } catch (IOException ioexc) {
                        ioexc.getMessage();
                    }

                    /*Create Spring User*/
                    boolean enabled = true;
                    boolean accountNonExpired = true;
                    boolean credentialsNonExpired = true;
                    boolean accountNonLocked = true;

                    user = new User(new_user.getUsername(), new_user.getPassword().toLowerCase(), enabled,
                            accountNonExpired, credentialsNonExpired, accountNonLocked,
                            getAuthorities(new_user.getRoles()));

                }

            }

        } catch (FacebookException ioex) {
            ioex.printStackTrace();
        }

    }

    return user;
}

---

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

protected String generateId() {
    try (Jedis jedis = pool.getResource()) {

        SecureRandom secureRandom = new SecureRandom();
        String rand = new BigInteger(128, secureRandom).toString(10);
        String id = saltKey + rand + jedis.incr(getGenerateIdKey()).toString();
        String newId = RedisUtils.hexEncode(messageDigest.digest(id.getBytes()));
        return newId;
    }//from  w  ww .j av a  2s.  co  m
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• »