Android Open Source - CryptoLock Key Manager

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From Project

Back to project page CryptoLock.

License

The source code is released under:

Apache License

Java Source Code

package com.example.cryptolock;
/*from w  ww .j  a  v  a 2 s  . c  o m*/
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.content.Context;
import android.util.Log;

public class KeyManager {

  private static final String TAG = "KeyManager";
  private static final String file1 = "id_value";
  private static final String file2 = "iv_value";
  private static Context ctx;

  public KeyManager(Context cntx) {
    ctx = cntx;
  }

  public void setId(byte[] data) {
    writer(data, file1);
  }

  public void setIv(byte[] data) {
    writer(data, file2);
  }

  public byte[] getId() {
    return reader(file1);
  }

  public byte[] getIv() {
    return reader(file2);
  }

  public byte[] reader(String file) {
    byte[] data = null;
    try {
      int bytesRead = 0;
      FileInputStream fis = ctx.openFileInput(file);
      ByteArrayOutputStream bos = new ByteArrayOutputStream();
      byte[] b = new byte[1024];
      while ((bytesRead = fis.read(b)) != -1) {
        bos.write(b, 0, bytesRead);
      }
      data = bos.toByteArray();
    } catch (FileNotFoundException e) {
      Log.e(TAG, "File not found in getId()");
    } catch (IOException e) {
      Log.e(TAG, "IOException in setId(): " + e.getMessage());
    }
    return data;
  }

  public void writer(byte[] data, String file) {
    try {
      FileOutputStream fos = ctx.openFileOutput(file,
          Context.MODE_PRIVATE);
      fos.write(data);
      fos.flush();
      fos.close();
    } catch (FileNotFoundException e) {
      Log.e(TAG, "File not found in setId()");
    } catch (IOException e) {
      Log.e(TAG, "IOException in setId(): " + e.getMessage());
    }
  }
}

Java Source Code List

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