Android Open Source - conceal Native Mac Helper

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License

The source code is released under:

BSD License For Conceal software Copyright (c) 2014, Facebook, Inc. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that...

Java Source Code

/*
 *  Copyright (c) 2014, Facebook, Inc.//  w  w  w  . java  2 s  . c o  m
 *  All rights reserved.
 *
 *  This source code is licensed under the BSD-style license found in the
 *  LICENSE file in the root directory of this source tree. An additional grant
 *  of patent rights can be found in the PATENTS file in the same directory.
 *
 */

package com.facebook.crypto.benchmarks.mac;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.SecureRandom;

import com.facebook.crypto.benchmarks.BenchmarkNativeCryptoLibrary;
import com.facebook.crypto.exception.CryptoInitializationException;
import com.facebook.crypto.mac.NativeMac;
import com.facebook.crypto.util.NativeCryptoLibrary;
import com.facebook.crypto.streams.NativeMacLayeredInputStream;
import com.facebook.crypto.streams.NativeMacLayeredOutputStream;

public class NativeMacHelper {

  public final byte[] key;

  private static final NativeCryptoLibrary mNativeCryptoLibrary =
      new BenchmarkNativeCryptoLibrary();

  public NativeMac getMac() throws IOException, CryptoInitializationException {
    NativeMac mac = new NativeMac(mNativeCryptoLibrary);
    mac.init(key, key.length);
    return mac;
  }

  private NativeMacHelper(byte[] key) {
    this.key = key;
  }

  public static NativeMacHelper getInstance() {
    byte[] key = new byte[NativeMac.KEY_LENGTH];
    new SecureRandom().nextBytes(key);
    return new NativeMacHelper(key);
  }

  public OutputStream getOutputStream(OutputStream rawStream)
      throws IOException, CryptoInitializationException {
    return new NativeMacLayeredOutputStream(getMac(), rawStream);
  }

  public InputStream getInputStream(InputStream rawStream)
      throws IOException, CryptoInitializationException {
    return new NativeMacLayeredInputStream(getMac(), rawStream);
  }
}

Java Source Code List

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