SignatureVerifier.java

/*
 * This file is part of Arduino.
 *
 * Copyright 2015 Arduino LLC (http://www.arduino.cc/)
 *
 * Arduino is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * As a special exception, you may use this file as part of a free software
 * library without restriction.  Specifically, if other files instantiate
 * templates or use macros or inline functions from this file, or you compile
 * this file and link it with other files to produce an executable, this
 * file does not by itself cause the resulting executable to be covered by
 * the GNU General Public License.  This exception does not however
 * invalidate any other reasons why the executable file might be covered by
 * the GNU General Public License.
 */

package cc.arduino.contributions;

import processing.app.BaseNoGui;

import java.io.File;
import java.io.IOException;

public abstract class SignatureVerifier {

  public boolean isSigned(File indexFile) {
    File signature = new File(indexFile.getParent(), indexFile.getName() + ".sig");
    if (!signature.exists()) {
      return false;
    }

    try {
      return verify(indexFile, signature, new File(BaseNoGui.getContentFile("lib"), "public.gpg.key"));
    } catch (Exception e) {
      BaseNoGui.showWarning(e.getMessage(), e.getMessage(), e);
      return false;
    }
  }

  public boolean isSigned(File indexFile, File signature) {
    try {
      return verify(indexFile, signature, new File(BaseNoGui.getContentFile("lib"), "public.gpg.key"));
    } catch (Exception e) {
      BaseNoGui.showWarning(e.getMessage(), e.getMessage(), e);
      return false;
    }
  }

  protected abstract boolean verify(File signedFile, File signature, File publicKey) throws IOException;

}