| // Copyright (C) 2017 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gerrit.server.project; |
| |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Maps; |
| import com.google.common.flogger.FluentLogger; |
| import com.google.gerrit.reviewdb.client.Project; |
| import com.google.gerrit.server.CurrentUser; |
| import com.google.gerrit.server.change.IncludedInResolver; |
| import com.google.gerrit.server.permissions.PermissionBackend; |
| import com.google.gerrit.server.permissions.PermissionBackend.RefFilterOptions; |
| import com.google.gerrit.server.permissions.PermissionBackendException; |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| import com.google.inject.Singleton; |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Map; |
| import java.util.Optional; |
| import org.eclipse.jgit.lib.Constants; |
| import org.eclipse.jgit.lib.Ref; |
| import org.eclipse.jgit.lib.RefDatabase; |
| import org.eclipse.jgit.lib.Repository; |
| import org.eclipse.jgit.revwalk.RevCommit; |
| import org.eclipse.jgit.revwalk.RevWalk; |
| |
| /** |
| * Report whether a commit is reachable from a set of commits. This is used for checking if a user |
| * has read permissions on a commit. |
| */ |
| @Singleton |
| public class Reachable { |
| private static final FluentLogger logger = FluentLogger.forEnclosingClass(); |
| |
| private final PermissionBackend permissionBackend; |
| |
| @Inject |
| Reachable(PermissionBackend permissionBackend) { |
| this.permissionBackend = permissionBackend; |
| } |
| |
| /** @return true if a commit is reachable from a given set of refs. */ |
| public boolean fromRefs( |
| Project.NameKey project, Repository repo, RevCommit commit, Map<String, Ref> refs) { |
| return fromRefs(project, repo, commit, refs, Optional.empty()); |
| } |
| |
| private boolean fromRefs( |
| Project.NameKey project, |
| Repository repo, |
| RevCommit commit, |
| Map<String, Ref> refs, |
| Optional<Provider<? extends CurrentUser>> userProvider) { |
| try (RevWalk rw = new RevWalk(repo)) { |
| Map<String, Ref> filtered = |
| userProvider |
| .map(up -> permissionBackend.user(up.get())) |
| .orElse(permissionBackend.currentUser()) |
| .project(project) |
| .filter(refs, repo, RefFilterOptions.builder().setFilterTagsSeparately(true).build()); |
| return IncludedInResolver.includedInAny(repo, rw, commit, filtered.values()); |
| } catch (IOException | PermissionBackendException e) { |
| logger.atSevere().withCause(e).log( |
| "Cannot verify permissions to commit object %s in repository %s", commit.name(), project); |
| return false; |
| } |
| } |
| |
| /** @return true if a commit is reachable from a repo's branches and tags. */ |
| boolean fromHeadsOrTags( |
| Project.NameKey project, |
| Repository repo, |
| RevCommit commit, |
| Provider<? extends CurrentUser> userProvider) { |
| try { |
| RefDatabase refdb = repo.getRefDatabase(); |
| Collection<Ref> heads = refdb.getRefsByPrefix(Constants.R_HEADS); |
| Collection<Ref> tags = refdb.getRefsByPrefix(Constants.R_TAGS); |
| Map<String, Ref> refs = Maps.newHashMapWithExpectedSize(heads.size() + tags.size()); |
| for (Ref r : Iterables.concat(heads, tags)) { |
| refs.put(r.getName(), r); |
| } |
| return fromRefs(project, repo, commit, refs, Optional.of(userProvider)); |
| } catch (IOException e) { |
| logger.atSevere().withCause(e).log( |
| "Cannot verify permissions to commit object %s in repository %s", commit.name(), project); |
| return false; |
| } |
| } |
| } |