1 <?php namespace BookStack\Auth\Access;
3 use BookStack\Auth\Access;
4 use BookStack\Auth\Role;
5 use BookStack\Auth\User;
6 use BookStack\Auth\UserRepo;
7 use BookStack\Exceptions\LdapException;
8 use Illuminate\Contracts\Auth\Authenticatable;
9 use Illuminate\Database\Eloquent\Builder;
13 * Handles any app-specific LDAP tasks.
14 * @package BookStack\Services
20 protected $ldapConnection;
26 * LdapService constructor.
28 * @param \BookStack\Auth\UserRepo $userRepo
30 public function __construct(Access\Ldap $ldap, UserRepo $userRepo)
33 $this->config = config('services.ldap');
34 $this->userRepo = $userRepo;
35 $this->enabled = config('auth.method') === 'ldap';
39 * Check if groups should be synced.
42 public function shouldSyncGroups()
44 return $this->enabled && $this->config['user_to_groups'] !== false;
48 * Search for attributes for a specific user on the ldap
49 * @param string $userName
50 * @param array $attributes
52 * @throws LdapException
54 private function getUserWithAttributes($userName, $attributes)
56 $ldapConnection = $this->getConnection();
57 $this->bindSystemUser($ldapConnection);
60 $userFilter = $this->buildFilter($this->config['user_filter'], ['user' => $userName]);
61 $baseDn = $this->config['base_dn'];
63 $followReferrals = $this->config['follow_referrals'] ? 1 : 0;
64 $this->ldap->setOption($ldapConnection, LDAP_OPT_REFERRALS, $followReferrals);
65 $users = $this->ldap->searchAndGetEntries($ldapConnection, $baseDn, $userFilter, $attributes);
66 if ($users['count'] === 0) {
74 * Get the details of a user from LDAP using the given username.
75 * User found via configurable user filter.
78 * @throws LdapException
80 public function getUserDetails($userName)
82 $emailAttr = $this->config['email_attribute'];
83 $user = $this->getUserWithAttributes($userName, ['cn', 'uid', 'dn', $emailAttr]);
90 'uid' => (isset($user['uid'])) ? $user['uid'][0] : $user['dn'],
91 'name' => $user['cn'][0],
93 'email' => (isset($user[$emailAttr])) ? (is_array($user[$emailAttr]) ? $user[$emailAttr][0] : $user[$emailAttr]) : null
98 * @param Authenticatable $user
99 * @param string $username
100 * @param string $password
102 * @throws LdapException
104 public function validateUserCredentials(Authenticatable $user, $username, $password)
106 $ldapUser = $this->getUserDetails($username);
107 if ($ldapUser === null) {
110 if ($ldapUser['uid'] !== $user->external_auth_id) {
114 $ldapConnection = $this->getConnection();
116 $ldapBind = $this->ldap->bind($ldapConnection, $ldapUser['dn'], $password);
117 } catch (\ErrorException $e) {
125 * Bind the system user to the LDAP connection using the given credentials
126 * otherwise anonymous access is attempted.
128 * @throws LdapException
130 protected function bindSystemUser($connection)
132 $ldapDn = $this->config['dn'];
133 $ldapPass = $this->config['pass'];
135 $isAnonymous = ($ldapDn === false || $ldapPass === false);
137 $ldapBind = $this->ldap->bind($connection);
139 $ldapBind = $this->ldap->bind($connection, $ldapDn, $ldapPass);
143 throw new LdapException(($isAnonymous ? trans('errors.ldap_fail_anonymous') : trans('errors.ldap_fail_authed')));
148 * Get the connection to the LDAP server.
149 * Creates a new connection if one does not exist.
151 * @throws LdapException
153 protected function getConnection()
155 if ($this->ldapConnection !== null) {
156 return $this->ldapConnection;
159 // Check LDAP extension in installed
160 if (!function_exists('ldap_connect') && config('app.env') !== 'testing') {
161 throw new LdapException(trans('errors.ldap_extension_not_installed'));
164 // Get port from server string and protocol if specified.
165 $ldapServer = explode(':', $this->config['server']);
166 $hasProtocol = preg_match('/^ldaps{0,1}\:\/\//', $this->config['server']) === 1;
168 array_unshift($ldapServer, '');
170 $hostName = $ldapServer[0] . ($hasProtocol?':':'') . $ldapServer[1];
171 $defaultPort = $ldapServer[0] === 'ldaps' ? 636 : 389;
173 $ldapConnection = $this->ldap->connect($hostName, count($ldapServer) > 2 ? intval($ldapServer[2]) : $defaultPort);
175 // Check if TLS_INSECURE is set
176 if($this->config['tls_insecure']) {
177 $this->ldap->setOption($ldapConnection, LDAP_OPT_X_TLS_REQUIRE_CERT, LDAP_OPT_X_TLS_NEVER);
180 if ($ldapConnection === false) {
181 throw new LdapException(trans('errors.ldap_cannot_connect'));
184 // Set any required options
185 if ($this->config['version']) {
186 $this->ldap->setVersion($ldapConnection, $this->config['version']);
189 $this->ldapConnection = $ldapConnection;
190 return $this->ldapConnection;
194 * Build a filter string by injecting common variables.
195 * @param string $filterString
196 * @param array $attrs
199 protected function buildFilter($filterString, array $attrs)
202 foreach ($attrs as $key => $attrText) {
203 $newKey = '${' . $key . '}';
204 $newAttrs[$newKey] = $attrText;
206 return strtr($filterString, $newAttrs);
210 * Get the groups a user is a part of on ldap
211 * @param string $userName
213 * @throws LdapException
215 public function getUserGroups($userName)
217 $groupsAttr = $this->config['group_attribute'];
218 $user = $this->getUserWithAttributes($userName, [$groupsAttr]);
220 if ($user === null) {
224 $userGroups = $this->groupFilter($user);
225 $userGroups = $this->getGroupsRecursive($userGroups, []);
230 * Get the parent groups of an array of groups
231 * @param array $groupsArray
232 * @param array $checked
234 * @throws LdapException
236 private function getGroupsRecursive($groupsArray, $checked)
239 foreach ($groupsArray as $groupName) {
240 if (in_array($groupName, $checked)) {
244 $groupsToAdd = $this->getGroupGroups($groupName);
245 $groups_to_add = array_merge($groups_to_add, $groupsToAdd);
246 $checked[] = $groupName;
248 $groupsArray = array_unique(array_merge($groupsArray, $groups_to_add), SORT_REGULAR);
250 if (!empty($groups_to_add)) {
251 return $this->getGroupsRecursive($groupsArray, $checked);
258 * Get the parent groups of a single group
259 * @param string $groupName
261 * @throws LdapException
263 private function getGroupGroups($groupName)
265 $ldapConnection = $this->getConnection();
266 $this->bindSystemUser($ldapConnection);
268 $followReferrals = $this->config['follow_referrals'] ? 1 : 0;
269 $this->ldap->setOption($ldapConnection, LDAP_OPT_REFERRALS, $followReferrals);
271 $baseDn = $this->config['base_dn'];
272 $groupsAttr = strtolower($this->config['group_attribute']);
274 $groups = $this->ldap->searchAndGetEntries($ldapConnection, $baseDn, 'CN='.$groupName, [$groupsAttr]);
275 if ($groups['count'] === 0) {
279 $groupGroups = $this->groupFilter($groups[0]);
284 * Filter out LDAP CN and DN language in a ldap search return
285 * Gets the base CN (common name) of the string
286 * @param string $ldapSearchReturn
289 protected function groupFilter($ldapSearchReturn)
291 $groupsAttr = strtolower($this->config['group_attribute']);
294 if (isset($ldapSearchReturn[$groupsAttr]['count'])) {
295 $count = (int) $ldapSearchReturn[$groupsAttr]['count'];
297 for ($i=0; $i<$count; $i++) {
298 $dnComponents = ldap_explode_dn($ldapSearchReturn[$groupsAttr][$i], 1);
299 if (!in_array($dnComponents[0], $ldapGroups)) {
300 $ldapGroups[] = $dnComponents[0];
307 * Sync the LDAP groups to the user roles for the current user
308 * @param \BookStack\Auth\User $user
309 * @param string $username
310 * @throws LdapException
312 public function syncGroups(User $user, string $username)
314 $userLdapGroups = $this->getUserGroups($username);
316 // Get the ids for the roles from the names
317 $ldapGroupsAsRoles = $this->matchLdapGroupsToSystemsRoles($userLdapGroups);
320 if ($this->config['remove_from_groups']) {
321 $user->roles()->sync($ldapGroupsAsRoles);
322 $this->userRepo->attachDefaultRole($user);
324 $user->roles()->syncWithoutDetaching($ldapGroupsAsRoles);
329 * Match an array of group names from LDAP to BookStack system roles.
330 * Formats LDAP group names to be lower-case and hyphenated.
331 * @param array $groupNames
332 * @return \Illuminate\Support\Collection
334 protected function matchLdapGroupsToSystemsRoles(array $groupNames)
336 foreach ($groupNames as $i => $groupName) {
337 $groupNames[$i] = str_replace(' ', '-', trim(strtolower($groupName)));
340 $roles = Role::query()->where(function (Builder $query) use ($groupNames) {
341 $query->whereIn('name', $groupNames);
342 foreach ($groupNames as $groupName) {
343 $query->orWhere('external_auth_id', 'LIKE', '%' . $groupName . '%');
347 $matchedRoles = $roles->filter(function (Role $role) use ($groupNames) {
348 return $this->roleMatchesGroupNames($role, $groupNames);
351 return $matchedRoles->pluck('id');
355 * Check a role against an array of group names to see if it matches.
356 * Checked against role 'external_auth_id' if set otherwise the name of the role.
357 * @param \BookStack\Auth\Role $role
358 * @param array $groupNames
361 protected function roleMatchesGroupNames(Role $role, array $groupNames)
363 if ($role->external_auth_id) {
364 $externalAuthIds = explode(',', strtolower($role->external_auth_id));
365 foreach ($externalAuthIds as $externalAuthId) {
366 if (in_array(trim($externalAuthId), $groupNames)) {
373 $roleName = str_replace(' ', '-', trim(strtolower($role->display_name)));
374 return in_array($roleName, $groupNames);