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// Copyright (C) 2009 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.account;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.AccountGroup;
import com.google.gerrit.entities.GroupDescription;
import com.google.gerrit.exceptions.NoSuchGroupException;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.permissions.GlobalPermission;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
/** Access control management for a group of accounts managed in Gerrit. */
public class GroupControl {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
@Singleton
public static class GenericFactory {
private final PermissionBackend permissionBackend;
private final GroupBackend groupBackend;
@Inject
GenericFactory(PermissionBackend permissionBackend, GroupBackend gb) {
this.permissionBackend = permissionBackend;
groupBackend = gb;
}
public GroupControl controlFor(CurrentUser who, AccountGroup.UUID groupId)
throws NoSuchGroupException {
GroupDescription.Basic group = groupBackend.get(groupId);
if (group == null) {
throw new NoSuchGroupException(groupId);
}
return new GroupControl(who, group, permissionBackend, groupBackend);
}
}
public static class Factory {
private final PermissionBackend permissionBackend;
private final Provider user;
private final GroupBackend groupBackend;
@Inject
Factory(PermissionBackend permissionBackend, Provider cu, GroupBackend gb) {
this.permissionBackend = permissionBackend;
user = cu;
groupBackend = gb;
}
public GroupControl controlFor(AccountGroup.UUID groupId) throws NoSuchGroupException {
final GroupDescription.Basic group = groupBackend.get(groupId);
if (group == null) {
throw new NoSuchGroupException(groupId);
}
return controlFor(group);
}
public GroupControl controlFor(GroupDescription.Basic group) {
return new GroupControl(user.get(), group, permissionBackend, groupBackend);
}
public GroupControl validateFor(AccountGroup.UUID groupUUID) throws NoSuchGroupException {
final GroupControl c = controlFor(groupUUID);
if (!c.isVisible()) {
throw new NoSuchGroupException(groupUUID);
}
return c;
}
}
private final CurrentUser user;
private final GroupDescription.Basic group;
private Boolean isOwner;
private final PermissionBackend.WithUser perm;
private final GroupBackend groupBackend;
GroupControl(
CurrentUser who,
GroupDescription.Basic gd,
PermissionBackend permissionBackend,
GroupBackend gb) {
user = who;
group = gd;
this.perm = permissionBackend.user(user);
groupBackend = gb;
}
public GroupDescription.Basic getGroup() {
return group;
}
public CurrentUser getUser() {
return user;
}
/** Can this user see this group exists? */
public boolean isVisible() {
if (user.isInternalUser()) {
logger.atFine().log(
"group %s is visible to internal user %s",
group.getGroupUUID().get(), user.getLoggableName());
return true;
}
if (groupBackend.isVisibleToAll(group.getGroupUUID())) {
logger.atFine().log(
"group %s is visible to user %s (group is visible to all users)",
group.getGroupUUID().get(), user.getLoggableName());
return true;
}
if (user.getEffectiveGroups().contains(group.getGroupUUID())) {
logger.atFine().log(
"group %s is visible to user %s (user is member of the group)",
group.getGroupUUID().get(), user.getLoggableName());
return true;
}
if (isOwner()) {
logger.atFine().log(
"group %s is visible to user %s (user is owner of the group)",
group.getGroupUUID().get(), user.getLoggableName());
return true;
}
// The check for canAdministrateServer may seem redundant, but it's needed to make external
// groups visible to server administrators.
if (canAdministrateServer()) {
logger.atFine().log(
"group %s is visible to user %s (user is admin)",
group.getGroupUUID().get(), user.getLoggableName());
return true;
}
logger.atFine().log(
"group %s is not visible to user %s", group.getGroupUUID().get(), user.getLoggableName());
return false;
}
public boolean isOwner() {
if (isOwner != null) {
return isOwner;
}
// Keep this logic in sync with DefaultRefFilter#isGroupOwner(...).
if (group instanceof GroupDescription.Internal) {
AccountGroup.UUID ownerUUID = ((GroupDescription.Internal) group).getOwnerGroupUUID();
if (getUser().getEffectiveGroups().contains(ownerUUID)) {
logger.atFine().log(
"user %s is owner of group %s", user.getLoggableName(), group.getGroupUUID().get());
isOwner = true;
} else if (canAdministrateServer()) {
logger.atFine().log(
"user %s is owner of group %s (user is admin)",
user.getLoggableName(), group.getGroupUUID().get());
isOwner = true;
} else {
logger.atFine().log(
"user %s is not an owner of group %s",
user.getLoggableName(), group.getGroupUUID().get());
isOwner = false;
}
} else {
logger.atFine().log(
"user %s is not an owner of external group %s",
user.getLoggableName(), group.getGroupUUID().get());
isOwner = false;
}
return isOwner;
}
private boolean canAdministrateServer() {
try {
return perm.test(GlobalPermission.ADMINISTRATE_SERVER);
} catch (PermissionBackendException e) {
logger.atFine().log(
"Failed to check %s global capability for user %s",
GlobalPermission.ADMINISTRATE_SERVER, user.getLoggableName());
return false;
}
}
public boolean canAddMember() {
return isOwner();
}
public boolean canRemoveMember() {
return isOwner();
}
public boolean canSeeMember(Account.Id id) {
if (user.isIdentifiedUser() && user.getAccountId().equals(id)) {
return true;
}
return canSeeMembers();
}
public boolean canAddGroup() {
return isOwner();
}
public boolean canRemoveGroup() {
return isOwner();
}
public boolean canSeeGroup() {
return canSeeMembers();
}
private boolean canSeeMembers() {
if (group instanceof GroupDescription.Internal) {
return ((GroupDescription.Internal) group).isVisibleToAll() || isOwner();
}
return canAdministrateServer();
}
}
