Create Md5 Checksum : MD5.xml « Security « Android

1. Android
2. Security
3. MD5.xml

Create Md5 Checksum

 
//package com.si.anddos.utils;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.MessageDigest;
import java.util.Date;

/**
 * 
 * @author Carlos Martinez
 */
class Utils {
  // --------- Carlos Martinez -------------------
  public static String inputStreamAsString(InputStream stream)
      throws IOException {

    BufferedReader br = new BufferedReader(new InputStreamReader(stream,
        "UTF-8"));
    StringBuilder sb = new StringBuilder();
    String line = null;

    while ((line = br.readLine()) != null) {
      sb.append(line).append('\n');
    }

    br.close();

    return sb.toString();
  }

  // ----------- Carlos Martinez ----------------------
  public static String parseLastValueStr(String s, String oddelovac) {
    return s.substring(s.lastIndexOf(oddelovac) + 1);
  }

  public static long getDateLong() {
    Date d = new Date();
    return d.getTime();
  }

  public static String getMD5(File file) throws FileNotFoundException,
      IOException {
    /*
     * try { MessageDigest md =
     * java.security.MessageDigest.getInstance("MD5"); FileInputStream fio =
     * new FileInputStream(file);
     * 
     * int length = (int)file.length(); byte [] bytes = new byte[length];
     * fio.read(bytes);
     * 
     * md.update(bytes); md.digest(); } catch (NoSuchAlgorithmException e) {
     * e.printStackTrace(); }
     * 
     * FileInputStream fis = new FileInputStream( file ); String md5 =
     * "";//org.apache.commons.codec.digest.DigestUtils.md5Hex( fis );
     * 
     * return md5;
     */

    try {
      return getMD5Checksum(file.getAbsolutePath());
    } catch (Exception e) {
      e.printStackTrace();
    }
    
    return "";
  }

  public static byte[] createChecksum(String filename) throws Exception {
    InputStream fis = new FileInputStream(filename);

    byte[] buffer = new byte[1024];
    MessageDigest complete = MessageDigest.getInstance("MD5");
    int numRead;
    do {
      numRead = fis.read(buffer);
      if (numRead > 0) {
        complete.update(buffer, 0, numRead);
      }
    } while (numRead != -1);
    fis.close();
    return complete.digest();
  }

  // see this How-to for a faster way to convert
  // a byte array to a HEX string
  public static String getMD5Checksum(String filename) throws Exception {
    byte[] b = createChecksum(filename);
    String result = "";
    for (int i = 0; i < b.length; i++) {
      result += Integer.toString((b[i] & 0xff) + 0x100, 16).substring(1);
    }
    return result;
  }
}

   
  

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