save Account information using DES to a Properties file - Android Account

Android examples for Account:Account Information

  1. HOME
  2. Android
  3. Account
  4. Account Information

Description

save Account information using DES to a Properties file

Demo Code


import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.security.Key;
import java.security.spec.AlgorithmParameterSpec;
import java.util.Properties;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;

import android.text.TextUtils;

public class Main {
  public static final String filePath = "cookie.prop";
  public static final String PRIVATEKEY = "asdfasdf";
  public static final String ALGORITHM_DES = "DES/CBC/PKCS5Padding";
  public static final String KEY1 = "mobileNo";
  public static final String KEY2 = "password";
  public static final String comment = "Account";

  public static boolean saveAccount(String mobileNo, String pwd) {
    writeProperties(encode(PRIVATEKEY, mobileNo), encode(PRIVATEKEY, pwd));
    return true;//from   w w  w  .  j a v  a  2s.c om
  }

  public static void writeProperties(String value1, String value2) {
    if (TextUtils.isEmpty(value1) || TextUtils.isEmpty(value2)) {
      return;
    }
    FileInputStream fis = null;
    FileOutputStream fos = null;
    File f = new File(filePath);
    try {
      if (!f.exists() || !f.isFile()) {
        f.createNewFile();
      }
      fis = new FileInputStream(f);
      Properties p = new Properties();
      p.load(fis);

      p.setProperty(KEY1, value1);
      p.setProperty(KEY2, value2);
      fos = new FileOutputStream(f);
      p.store(fos, comment);
    } catch (Exception e) {
    } finally {
      if (fis != null) {
        try {
          fis.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
      if (fos != null) {
        try {
          fos.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }
  }

  public static String encode(String key, String data) {
    if (data == null)
      return null;
    try {
      DESKeySpec dks = new DESKeySpec(key.getBytes());
      SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");

      Key secretKey = keyFactory.generateSecret(dks);
      Cipher cipher = Cipher.getInstance(ALGORITHM_DES);
      IvParameterSpec iv = new IvParameterSpec("12345678".getBytes());
      AlgorithmParameterSpec paramSpec = iv;
      cipher.init(Cipher.ENCRYPT_MODE, secretKey, paramSpec);
      byte[] bytes = cipher.doFinal(data.getBytes());
      return byte2hex(bytes);
    } catch (Exception e) {
      e.printStackTrace();
      return data;
    }
  }

  private static String byte2hex(byte[] b) {
    StringBuilder hs = new StringBuilder();
    String stmp;
    for (int n = 0; b != null && n < b.length; n++) {
      stmp = Integer.toHexString(b[n] & 0XFF);
      if (stmp.length() == 1)
        hs.append('0');
      hs.append(stmp);
    }
    return hs.toString().toUpperCase();
  }
}

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