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

static public String digest(String input) {
    try {/*from w  w  w . j a v  a 2  s .c  o m*/
        MessageDigest md = MessageDigest.getInstance("MD5");
        return new BigInteger(1, md.digest(input.getBytes())).toString(16).toUpperCase();
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

static String getGeneratedUdid() {
    SecureRandom localSecureRandom = new SecureRandom();
    return new BigInteger(64, localSecureRandom).toString(16);
}

From source file:Main.java

/**
 * Transforms a byte array to a//from   ww  w  .j a  v  a  2s  .  c  o m
 * positive number string
 * @param in byte array
 * @return positive number string
 */
public static String bytesToPositiveNumString(byte[] in) {
    BigInteger num = new BigInteger(1, in);
    return num.toString();
}

From source file:Main.java

public static String getMd5(String source) {
    try {//from   ww  w  .  j  a va2 s.  co  m
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        md5.update(source.getBytes());
        BigInteger bi = new BigInteger(1, md5.digest());
        return String.format("%032x", bi);
    } catch (Exception e) {
        return "";
    }
}

From source file:Main.java

public static String convertToMD5(String toEnc) {
    try {//  w w  w .j  a  va  2  s . co  m
        MessageDigest mdEnc = MessageDigest.getInstance("MD5");
        mdEnc.update(toEnc.getBytes(), 0, toEnc.length());
        return new BigInteger(1, mdEnc.digest()).toString(16);
    } catch (Exception e) {
        return null;
    }
}

From source file:Main.java

public static Key getRSAKey(String hexModulus, String hexPrivateExponent) throws Exception {
    BigInteger m = new BigInteger(hexModulus, 16);
    BigInteger e = new BigInteger(hexPrivateExponent, 16);
    RSAPrivateKeySpec keySpec = new RSAPrivateKeySpec(m, e);
    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
    Key rsaKey = keyFactory.generatePrivate(keySpec);
    return rsaKey;
}

From source file:Main.java

public static String getStringMD5(String str) {
    String value = null;//from  ww  w.  j  a  v a2 s. c  o m
    try {
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        md5.update(str.getBytes());
        BigInteger bi = new BigInteger(1, md5.digest());
        value = bi.toString(16).toUpperCase();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return value;
}

From source file:Main.java

public static String hashMD5(String s) {
    try {/* ww w. j  a va2 s. c  o m*/
        MessageDigest m = MessageDigest.getInstance("MD5");
        m.update(s.getBytes(), 0, s.length());
        String result = new BigInteger(1, m.digest()).toString();
        while (result.length() < 32) {
            result = "0" + result;
        }
        return result;
    } catch (NoSuchAlgorithmException e) {
        return null;
    }
}

From source file:Main.java

private static String escapeSql(String value) {
    if (value == null) {
        return "NULL";
    }/* w ww  .ja v a 2s.  c  o  m*/
    String hexValue;
    try {
        hexValue = String.format("%x", new BigInteger(1, value.getBytes("UTF-8"))); // NOTE: implicitly assuming here database is using UTF-8 encoding
    } catch (UnsupportedEncodingException e) {
        throw new RuntimeException("Unsupported character");
    }
    return "X'" + hexValue + "'";
}

From source file:Main.java

public static String SHA256Encrypt(String strForEncrypt) {
    byte[] data = getHash(strForEncrypt);
    return String.format("%0" + (data.length * 2) + "X", new BigInteger(1, data)).toLowerCase();
}