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

private static String digest(final String value) {
    final byte[] digested;
    try {/*  ww w  .  j a va 2  s . c  om*/
        digested = MessageDigest.getInstance(HASH_ALGORITHM).digest(value.getBytes(CHARSET));
    } catch (final NoSuchAlgorithmException e) {
        return null;
    } catch (final UnsupportedEncodingException e) {
        return null;
    }

    final String hashed = new BigInteger(1, digested).toString(16);
    final int padding = HASH_LENGTH - hashed.length();
    if (padding == 0) {
        return hashed;
    }

    final char[] zeros = new char[padding];
    Arrays.fill(zeros, '0');
    return new StringBuilder(HASH_LENGTH).append(zeros).append(hashed).toString();
}

From source file:Main.java

public static String md5(String input) {
    String result = input;/*from   ww  w.j  ava2 s  . com*/
    if (input != null) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(input.getBytes());
            BigInteger hash = new BigInteger(1, md.digest());
            result = hash.toString(16);
            if ((result.length() % 2) != 0) {
                result = "0" + result;
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
    }
    return result;
}

From source file:com.jopss.logico.negocio.util.CriptoUtils.java

public static String md5Encrypt(String texto) {
    String encripted = null;//from w ww .  ja  v  a2 s  . c  o  m
    try {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(texto.getBytes());
        BigInteger hash = new BigInteger(1, md.digest());
        encripted = hash.toString(16);
    } catch (NoSuchAlgorithmException e) {
        log.error(e);
    }
    return encripted;
}

From source file:Main.java

public static String generateSecureKey() {
    return new BigInteger(512, random).toString(32);
}

From source file:net.maritimecloud.identityregistry.utils.PasswordUtil.java

public static String generatePassword() {
    SecureRandom secRandom = new SecureRandom();
    return new BigInteger(130, secRandom).toString(32);
}

From source file:Main.java

public static String md5(String input) throws Exception {
    MessageDigest md5 = MessageDigest.getInstance("MD5");
    md5.update(input.getBytes("UTF-8"));
    BigInteger hash = new BigInteger(1, md5.digest());
    return String.format("%1$032X", hash);
}

From source file:Main.java

public static String toBase58(byte[] b) {
    if (b.length == 0) {
        return "";
    }/*w  ww.ja v  a  2s  .  co m*/

    int lz = 0;
    while (lz < b.length && b[lz] == 0) {
        ++lz;
    }

    StringBuffer s = new StringBuffer();
    BigInteger n = new BigInteger(1, b);
    while (n.compareTo(BigInteger.ZERO) > 0) {
        BigInteger[] r = n.divideAndRemainder(BigInteger.valueOf(58));
        n = r[0];
        char digit = b58[r[1].intValue()];
        s.append(digit);
    }
    while (lz > 0) {
        --lz;
        s.append("1");
    }
    return s.reverse().toString();
}

From source file:Main.java

public static PublicKey pubKeyFromJwk(String jwkp) {
    PublicKey pubKey = null;/*from w  ww .j  ava  2  s. co m*/

    try {
        JSONObject jk = new JSONObject(jwkp).getJSONArray("keys").getJSONObject(0);

        BigInteger n = new BigInteger(1, decodeB64(jk.getString("n")));
        BigInteger e = new BigInteger(1, decodeB64(jk.getString("e")));
        RSAPublicKeySpec pubRsaSpec = new RSAPublicKeySpec(n, e);
        KeyFactory keyfact = KeyFactory.getInstance("RSA", "SC");
        pubKey = keyfact.generatePublic(pubRsaSpec);
    } catch (Exception e) {
        e.printStackTrace();
    }

    return pubKey;
}

From source file:Main.java

private static String md5(String origin) {
    try {/*from  w  w w .  jav  a 2s  .  c om*/
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(origin.getBytes("UTF-8"));
        BigInteger bi = new BigInteger(1, md.digest());

        return bi.toString(16);
    } catch (Exception e) {
        return getUuid();
    }
}

From source file:Main.java

public static String getMD5Hash(String s) throws NoSuchAlgorithmException {
    MessageDigest m = MessageDigest.getInstance("MD5");
    byte[] data = s.getBytes();
    m.update(data, 0, data.length);/*  w  w w  .  j a  v  a 2 s.c  o  m*/
    BigInteger i = new BigInteger(1, m.digest());
    return String.format("%1$032X", i);
}