Line data    Source code

       1             : // Copyright (C) 2017 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.sshd.plugin;
      16             : 
      17             : import com.google.common.flogger.FluentLogger;
      18             : import com.google.gerrit.extensions.registration.DynamicItem;
      19             : import com.google.gerrit.server.CurrentUser;
      20             : import com.google.gerrit.server.config.GerritServerConfig;
      21             : import com.google.gerrit.sshd.CommandModule;
      22             : import com.google.gerrit.sshd.SshCommand;
      23             : import com.google.inject.Inject;
      24             : import java.util.ArrayList;
      25             : import java.util.List;
      26             : import org.eclipse.jgit.lib.Config;
      27             : import org.kohsuke.args4j.Argument;
      28             : 
      29             : public class LfsPluginAuthCommand extends SshCommand {
      30           0 :   private static final FluentLogger logger = FluentLogger.forEnclosingClass();
      31             : 
      32             :   private static final String CONFIGURATION_ERROR =
      33             :       "Server configuration error: LFS auth over SSH is not properly configured.";
      34             : 
      35             :   public interface LfsSshPluginAuth {
      36             :     String authenticate(CurrentUser user, List<String> args) throws UnloggedFailure, Failure;
      37             :   }
      38             : 
      39             :   public static class LfsPluginAuthCommandModule extends CommandModule {
      40             :     private final boolean pluginProvided;
      41             : 
      42             :     @Inject
      43          17 :     LfsPluginAuthCommandModule(@GerritServerConfig Config cfg) {
      44          17 :       pluginProvided = cfg.getString("lfs", null, "plugin") != null;
      45          17 :     }
      46             : 
      47             :     @Override
      48             :     protected void configure() {
      49          17 :       if (pluginProvided) {
      50           0 :         command("git-lfs-authenticate").to(LfsPluginAuthCommand.class);
      51           0 :         DynamicItem.itemOf(binder(), LfsSshPluginAuth.class);
      52             :       }
      53          17 :     }
      54             :   }
      55             : 
      56             :   private final DynamicItem<LfsSshPluginAuth> auth;
      57             : 
      58           0 :   @Argument(index = 0, multiValued = true, metaVar = "PARAMS")
      59             :   private List<String> args = new ArrayList<>();
      60             : 
      61             :   @Inject
      62           0 :   LfsPluginAuthCommand(DynamicItem<LfsSshPluginAuth> auth) {
      63           0 :     this.auth = auth;
      64           0 :   }
      65             : 
      66             :   @Override
      67             :   protected void run() throws UnloggedFailure, Exception {
      68           0 :     LfsSshPluginAuth pluginAuth = auth.get();
      69           0 :     if (pluginAuth == null) {
      70           0 :       logger.atWarning().log(CONFIGURATION_ERROR);
      71           0 :       throw new UnloggedFailure(1, CONFIGURATION_ERROR);
      72             :     }
      73             : 
      74           0 :     stdout.print(pluginAuth.authenticate(user, args));
      75           0 :   }
      76             : }