// 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.base.Strings;
import com.google.gerrit.audit.AuditService;
import com.google.gerrit.common.TimeUtil;
import com.google.gerrit.common.data.AccessSection;
import com.google.gerrit.common.data.GlobalCapability;
import com.google.gerrit.common.data.Permission;
import com.google.gerrit.common.errors.NameAlreadyUsedException;
import com.google.gerrit.extensions.client.AccountFieldName;
import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.reviewdb.client.AccountGroup;
import com.google.gerrit.reviewdb.client.AccountGroupMember;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.account.externalids.ExternalId;
import com.google.gerrit.server.account.externalids.ExternalIds;
import com.google.gerrit.server.account.externalids.ExternalIdsUpdate;
import com.google.gerrit.server.project.ProjectCache;
import com.google.gerrit.server.query.account.InternalAccountQuery;
import com.google.gwtorm.server.OrmException;
import com.google.gwtorm.server.SchemaFactory;
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.Collections;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicBoolean;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/** Tracks authentication related details for user accounts. */
@Singleton
public class AccountManager {
private static final Logger log = LoggerFactory.getLogger(AccountManager.class);
private final SchemaFactory<ReviewDb> schema;
private final AccountsUpdate.Server accountsUpdateFactory;
private final AccountCache byIdCache;
private final AccountByEmailCache byEmailCache;
private final Realm realm;
private final IdentifiedUser.GenericFactory userFactory;
private final ChangeUserName.Factory changeUserNameFactory;
private final ProjectCache projectCache;
private final AtomicBoolean awaitsFirstAccountCheck;
private final AuditService auditService;
private final Provider<InternalAccountQuery> accountQueryProvider;
private final ExternalIds externalIds;
private final ExternalIdsUpdate.Server externalIdsUpdateFactory;
@Inject
AccountManager(
SchemaFactory<ReviewDb> schema,
AccountsUpdate.Server accountsUpdateFactory,
AccountCache byIdCache,
AccountByEmailCache byEmailCache,
Realm accountMapper,
IdentifiedUser.GenericFactory userFactory,
ChangeUserName.Factory changeUserNameFactory,
ProjectCache projectCache,
AuditService auditService,
Provider<InternalAccountQuery> accountQueryProvider,
ExternalIds externalIds,
ExternalIdsUpdate.Server externalIdsUpdateFactory) {
this.schema = schema;
this.accountsUpdateFactory = accountsUpdateFactory;
this.byIdCache = byIdCache;
this.byEmailCache = byEmailCache;
this.realm = accountMapper;
this.userFactory = userFactory;
this.changeUserNameFactory = changeUserNameFactory;
this.projectCache = projectCache;
this.awaitsFirstAccountCheck = new AtomicBoolean(true);
this.auditService = auditService;
this.accountQueryProvider = accountQueryProvider;
this.externalIds = externalIds;
this.externalIdsUpdateFactory = externalIdsUpdateFactory;
}
/** @return user identified by this external identity string */
public Optional<Account.Id> lookup(String externalId) throws AccountException {
try {
AccountState accountState = accountQueryProvider.get().oneByExternalId(externalId);
return accountState != null
? Optional.of(accountState.getAccount().getId())
: Optional.empty();
} catch (OrmException e) {
throw new AccountException("Cannot lookup account " + externalId, e);
}
}
/**
* Authenticate the user, potentially creating a new account if they are new.
*
* @param who identity of the user, with any details we received about them.
* @return the result of authenticating the user.
* @throws AccountException the account does not exist, and cannot be created, or exists, but
* cannot be located, or is inactive.
*/
public AuthResult authenticate(AuthRequest who) throws AccountException, IOException {
who = realm.authenticate(who);
try {
try (ReviewDb db = schema.open()) {
ExternalId id = findExternalId(who.getExternalIdKey());
if (id == null) {
// New account, automatically create and return.
//
return create(db, who);
}
// Account exists
Account act = byIdCache.get(id.accountId()).getAccount();
if (!act.isActive()) {
throw new AccountException("Authentication error, account inactive");
}
// return the identity to the caller.
update(db, who, id);
return new AuthResult(id.accountId(), who.getExternalIdKey(), false);
}
} catch (OrmException | ConfigInvalidException e) {
throw new AccountException("Authentication error", e);
}
}
private ExternalId findExternalId(ExternalId.Key key) throws OrmException {
AccountState accountState = accountQueryProvider.get().oneByExternalId(key);
if (accountState != null) {
for (ExternalId extId : accountState.getExternalIds()) {
if (extId.key().equals(key)) {
return extId;
}
}
}
return null;
}
private void update(ReviewDb db, AuthRequest who, ExternalId extId)
throws OrmException, IOException, ConfigInvalidException {
IdentifiedUser user = userFactory.create(extId.accountId());
Account toUpdate = null;
// If the email address was modified by the authentication provider,
// update our records to match the changed email.
//
String newEmail = who.getEmailAddress();
String oldEmail = extId.email();
if (newEmail != null && !newEmail.equals(oldEmail)) {
if (oldEmail != null && oldEmail.equals(user.getAccount().getPreferredEmail())) {
toUpdate = load(toUpdate, user.getAccountId(), db);
toUpdate.setPreferredEmail(newEmail);
}
externalIdsUpdateFactory
.create()
.replace(
extId, ExternalId.create(extId.key(), extId.accountId(), newEmail, extId.password()));
}
if (!realm.allowsEdit(AccountFieldName.FULL_NAME)
&& !Strings.isNullOrEmpty(who.getDisplayName())
&& !eq(user.getAccount().getFullName(), who.getDisplayName())) {
toUpdate = load(toUpdate, user.getAccountId(), db);
toUpdate.setFullName(who.getDisplayName());
}
if (!realm.allowsEdit(AccountFieldName.USER_NAME)
&& who.getUserName() != null
&& !eq(user.getUserName(), who.getUserName())) {
log.warn(
String.format(
"Not changing already set username %s to %s", user.getUserName(), who.getUserName()));
}
if (toUpdate != null) {
db.accounts().update(Collections.singleton(toUpdate));
}
if (newEmail != null && !newEmail.equals(oldEmail)) {
byEmailCache.evict(oldEmail);
byEmailCache.evict(newEmail);
}
if (toUpdate != null) {
byIdCache.evict(toUpdate.getId());
}
}
private Account load(Account toUpdate, Account.Id accountId, ReviewDb db) throws OrmException {
if (toUpdate == null) {
toUpdate = db.accounts().get(accountId);
if (toUpdate == null) {
throw new OrmException("Account " + accountId + " has been deleted");
}
}
return toUpdate;
}
private static boolean eq(String a, String b) {
return (a == null && b == null) || (a != null && a.equals(b));
}
private AuthResult create(ReviewDb db, AuthRequest who)
throws OrmException, AccountException, IOException, ConfigInvalidException {
Account.Id newId = new Account.Id(db.nextAccountId());
Account account = new Account(newId, TimeUtil.nowTs());
ExternalId extId =
ExternalId.createWithEmail(who.getExternalIdKey(), newId, who.getEmailAddress());
account.setFullName(who.getDisplayName());
account.setPreferredEmail(extId.email());
boolean isFirstAccount =
awaitsFirstAccountCheck.getAndSet(false) && db.accounts().anyAccounts().toList().isEmpty();
try {
AccountsUpdate accountsUpdate = accountsUpdateFactory.create();
accountsUpdate.upsert(db, account);
ExternalId existingExtId = externalIds.get(extId.key());
if (existingExtId != null && !existingExtId.accountId().equals(extId.accountId())) {
// external ID is assigned to another account, do not overwrite
accountsUpdate.delete(db, account);
throw new AccountException(
"Cannot assign external ID \""
+ extId.key().get()
+ "\" to account "
+ newId
+ "; external ID already in use.");
}
externalIdsUpdateFactory.create().upsert(extId);
} finally {
// If adding the account failed, it may be that it actually was the
// first account. So we reset the 'check for first account'-guard, as
// otherwise the first account would not get administration permissions.
awaitsFirstAccountCheck.set(isFirstAccount);
}
if (isFirstAccount) {
// This is the first user account on our site. Assume this user
// is going to be the site's administrator and just make them that
// to bootstrap the authentication database.
//
Permission admin =
projectCache
.getAllProjects()
.getConfig()
.getAccessSection(AccessSection.GLOBAL_CAPABILITIES)
.getPermission(GlobalCapability.ADMINISTRATE_SERVER);
AccountGroup.UUID uuid = admin.getRules().get(0).getGroup().getUUID();
AccountGroup g = db.accountGroups().byUUID(uuid).iterator().next();
AccountGroup.Id adminId = g.getId();
AccountGroupMember m = new AccountGroupMember(new AccountGroupMember.Key(newId, adminId));
auditService.dispatchAddAccountsToGroup(newId, Collections.singleton(m));
db.accountGroupMembers().insert(Collections.singleton(m));
}
if (who.getUserName() != null) {
// Only set if the name hasn't been used yet, but was given to us.
//
IdentifiedUser user = userFactory.create(newId);
try {
changeUserNameFactory.create(user, who.getUserName()).call();
} catch (NameAlreadyUsedException e) {
String message =
"Cannot assign user name \""
+ who.getUserName()
+ "\" to account "
+ newId
+ "; name already in use.";
handleSettingUserNameFailure(db, account, extId, message, e, false);
} catch (InvalidUserNameException e) {
String message =
"Cannot assign user name \""
+ who.getUserName()
+ "\" to account "
+ newId
+ "; name does not conform.";
handleSettingUserNameFailure(db, account, extId, message, e, false);
} catch (OrmException e) {
String message = "Cannot assign user name";
handleSettingUserNameFailure(db, account, extId, message, e, true);
}
}
byEmailCache.evict(account.getPreferredEmail());
byIdCache.evict(account.getId());
realm.onCreateAccount(who, account);
return new AuthResult(newId, extId.key(), true);
}
/**
* This method handles an exception that occurred during the setting of the user name for a newly
* created account. If the realm does not allow the user to set a user name manually this method
* deletes the newly created account and throws an {@link AccountUserNameException}. In any case
* the error message is logged.
*
* @param db the database
* @param account the newly created account
* @param extId the newly created external id
* @param errorMessage the error message
* @param e the exception that occurred during the setting of the user name for the new account
* @param logException flag that decides whether the exception should be included into the log
* @throws AccountUserNameException thrown if the realm does not allow the user to manually set
* the user name
* @throws OrmException thrown if cleaning the database failed
*/
private void handleSettingUserNameFailure(
ReviewDb db,
Account account,
ExternalId extId,
String errorMessage,
Exception e,
boolean logException)
throws AccountUserNameException, OrmException, IOException, ConfigInvalidException {
if (logException) {
log.error(errorMessage, e);
} else {
log.error(errorMessage);
}
if (!realm.allowsEdit(AccountFieldName.USER_NAME)) {
// setting the given user name has failed, but the realm does not
// allow the user to manually set a user name,
// this means we would end with an account without user name
// (without 'username:<USERNAME>' entry in
// account_external_ids table),
// such an account cannot be used for uploading changes,
// this is why the best we can do here is to fail early and cleanup
// the database
accountsUpdateFactory.create().delete(db, account);
externalIdsUpdateFactory.create().delete(extId);
throw new AccountUserNameException(errorMessage, e);
}
}
/**
* Link another authentication identity to an existing account.
*
* @param to account to link the identity onto.
* @param who the additional identity.
* @return the result of linking the identity to the user.
* @throws AccountException the identity belongs to a different account, or it cannot be linked at
* this time.
*/
public AuthResult link(Account.Id to, AuthRequest who)
throws AccountException, OrmException, IOException, ConfigInvalidException {
try (ReviewDb db = schema.open()) {
ExternalId extId = findExternalId(who.getExternalIdKey());
if (extId != null) {
if (!extId.accountId().equals(to)) {
throw new AccountException("Identity in use by another account");
}
update(db, who, extId);
} else {
externalIdsUpdateFactory
.create()
.insert(ExternalId.createWithEmail(who.getExternalIdKey(), to, who.getEmailAddress()));
if (who.getEmailAddress() != null) {
Account a = db.accounts().get(to);
if (a.getPreferredEmail() == null) {
a.setPreferredEmail(who.getEmailAddress());
db.accounts().update(Collections.singleton(a));
}
}
if (who.getEmailAddress() != null) {
byEmailCache.evict(who.getEmailAddress());
}
byIdCache.evict(to);
}
return new AuthResult(to, who.getExternalIdKey(), false);
}
}
/**
* Update the link to another unique authentication identity to an existing account.
*
* <p>Existing external identities with the same scheme will be removed and replaced with the new
* one.
*
* @param to account to link the identity onto.
* @param who the additional identity.
* @return the result of linking the identity to the user.
* @throws OrmException
* @throws AccountException the identity belongs to a different account, or it cannot be linked at
* this time.
*/
public AuthResult updateLink(Account.Id to, AuthRequest who)
throws OrmException, AccountException, IOException, ConfigInvalidException {
Collection<ExternalId> filteredExtIdsByScheme =
externalIds.byAccount(to, who.getExternalIdKey().scheme());
if (!filteredExtIdsByScheme.isEmpty()
&& (filteredExtIdsByScheme.size() > 1
|| !filteredExtIdsByScheme
.stream()
.filter(e -> e.key().equals(who.getExternalIdKey()))
.findAny()
.isPresent())) {
externalIdsUpdateFactory.create().delete(filteredExtIdsByScheme);
}
byIdCache.evict(to);
return link(to, who);
}
/**
* Unlink an authentication identity from an existing account.
*
* @param from account to unlink the identity from.
* @param who the identity to delete
* @return the result of unlinking the identity from the user.
* @throws AccountException the identity belongs to a different account, or it cannot be unlinked
* at this time.
*/
public AuthResult unlink(Account.Id from, AuthRequest who)
throws AccountException, OrmException, IOException, ConfigInvalidException {
try (ReviewDb db = schema.open()) {
ExternalId extId = findExternalId(who.getExternalIdKey());
if (extId != null) {
if (!extId.accountId().equals(from)) {
throw new AccountException(
"Identity '" + who.getExternalIdKey().get() + "' in use by another account");
}
externalIdsUpdateFactory.create().delete(extId);
if (who.getEmailAddress() != null) {
Account a = db.accounts().get(from);
if (a.getPreferredEmail() != null
&& a.getPreferredEmail().equals(who.getEmailAddress())) {
a.setPreferredEmail(null);
db.accounts().update(Collections.singleton(a));
}
byEmailCache.evict(who.getEmailAddress());
byIdCache.evict(from);
}
} else {
throw new AccountException("Identity '" + who.getExternalIdKey().get() + "' not found");
}
return new AuthResult(from, who.getExternalIdKey(), false);
}
}
}