/*
* The MIT License
*
* Copyright 2014 Jesse Glick.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package jenkins.security.s2m;
import hudson.Extension;
import jenkins.util.SystemProperties;
import hudson.remoting.ChannelBuilder;
import jenkins.ReflectiveFilePathFilter;
import jenkins.security.ChannelConfigurator;
import org.kohsuke.accmod.Restricted;
import org.kohsuke.accmod.restrictions.DoNotUse;
import java.io.File;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Blocks agents from writing to files on the master by default (and also provide the kill switch.)
*/
@Restricted(DoNotUse.class) // impl
@Extension public class DefaultFilePathFilter extends ChannelConfigurator {
/**
* Escape hatch to disable this check completely.
*/
public static boolean BYPASS = SystemProperties.getBoolean(DefaultFilePathFilter.class.getName()+".allow");
private static final Logger LOGGER = Logger.getLogger(DefaultFilePathFilter.class.getName());
@Override
public void onChannelBuilding(ChannelBuilder builder, Object context) {
new ReflectiveFilePathFilter() {
protected boolean op(String op, File f) throws SecurityException {
if (BYPASS) {
LOGGER.log(Level.FINE, "agent allowed to {0} {1}", new Object[] {op, f});
return true;
} else {
return false;
}
}
}.installTo(builder, AdminFilePathFilter.ORDINAL+100);
// for the bypass switch to be effective, it should have a high priority
}
}