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:Main.java

public static String encodeBase58(byte[] input) {
    if (input == null) {
        return null;
    }/*from w  ww  . j av a 2  s  .  com*/
    StringBuilder str = new StringBuilder((input.length * 350) / 256 + 1);
    BigInteger bn = new BigInteger(1, input);
    long rem;
    while (true) {
        BigInteger[] divideAndRemainder = bn.divideAndRemainder(BASE58_CHUNK_MOD);
        bn = divideAndRemainder[0];
        rem = divideAndRemainder[1].longValue();
        if (bn.compareTo(BigInteger.ZERO) == 0) {
            break;
        }
        for (int i = 0; i < BASE58_CHUNK_DIGITS; i++) {
            str.append(BASE58[(int) (rem % 58)]);
            rem /= 58;
        }
    }
    while (rem != 0) {
        str.append(BASE58[(int) (rem % 58)]);
        rem /= 58;
    }
    str.reverse();
    int nLeadingZeros = 0;
    while (nLeadingZeros < input.length && input[nLeadingZeros] == 0) {
        str.insert(0, BASE58[0]);
        nLeadingZeros++;
    }
    return str.toString();
}

From source file:io.mapzone.controller.um.repository.AuthToken.java

private AuthToken(String token) {
    data = new BigInteger(token, 32);
}

From source file:com.wirecard.ezlinkwebservices.util.TerminalUtil.java

public static synchronized String strXor(String s1, String s2) {
    System.out.println("strXor=" + s1 + "  " + s2);
    BigInteger one = new BigInteger(s1, 16);
    BigInteger two = new BigInteger(s2, 16);
    BigInteger three = one.xor(two);
    String s3 = three.toString(16);
    System.out.println(s3);//from w  w  w.  ja va  2  s . co m
    return s3;
}

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.ja  va  2s .com*/
    }
}

From source file:au.gov.dto.springframework.security.web.csrf.CookieCsrfTokenRepository.java

@Override
public CsrfToken generateToken(HttpServletRequest request) {
    String tokenValue = new BigInteger(130, secureRandom).toString(32); // http://stackoverflow.com/a/41156
    return new DefaultCsrfToken(csrfHeaderName, csrfParameterName, tokenValue);
}

From source file:org.gravidence.gravifon.util.BasicUtils.java

/**
 * Generates secure random token of specified length.<p>
 * Generated token contains following characters: <code>[0-9a-z]</code>.
 * /*  www  .ja  va 2  s . co m*/
 * @param numberOfBits token length in bits
 * @return secure random token
 */
public static String generateToken(int numberOfBits) {
    return new BigInteger(numberOfBits, SECURE_RANDOM).toString(Character.MAX_RADIX);
}

From source file:Main.java

/**
 * Method for returning an md5 hash of a string.
 * /*from  w w  w  . j  a v  a2 s.c  om*/
 * @param val
 *            the string to hash.
 * @return A hex string representing the md5 hash of the input.
 */
private static String md5(String val) {
    String result = null;

    if ((val != null) && (val.length() > 0)) {
        try {
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            md5.update(val.getBytes(), 0, val.length());
            result = String.format("%032X", new BigInteger(1, md5.digest()));
        } catch (NoSuchAlgorithmException nsae) {
            result = val.substring(0, 32);
        }
    }

    return result;
}

From source file:com.siphyc.utils.Utilities.java

public static String generateNonce() {
    return new BigInteger(130, random).toString(32);
}

From source file:de.uniwue.info6.misc.StringTools.java

/**
 *
 *
 * @return
 */
public static String nextSessionId() {
    return new BigInteger(130, random).toString(32);
}

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

/**
 * Constructs a {@link DefaultIdGenerator} object using a {@link Random} as its underlying source.
 * @param random random number generator (should be a {@link SecureRandom} instance in most cases)
 * @param limit maximum value the id generated can be
 * @throws NullPointerException if any arguments are {@code null}
 * @throws IllegalArgumentException if limit is 0
 *///from ww w . jav  a2  s .  co  m
public IdGenerator(Random random, byte[] limit) {
    Validate.notNull(random);
    Validate.notNull(limit);
    Validate.isTrue(limit.length > 0 && !new BigInteger(1, limit).equals(BigInteger.ZERO));
    this.random = random;
    this.limit = Arrays.copyOf(limit, limit.length);
}