241 lines
7.1 KiB
PHP
241 lines
7.1 KiB
PHP
<?php namespace BookStack\Auth\Access;
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use BookStack\Auth\Access;
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use BookStack\Auth\Role;
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use BookStack\Auth\User;
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use BookStack\Auth\UserRepo;
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use BookStack\Exceptions\SamlException;
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use Illuminate\Contracts\Auth\Authenticatable;
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use Illuminate\Database\Eloquent\Builder;
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use Illuminate\Support\Facades\Auth;
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use Illuminate\Support\Facades\Log;
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/**
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* Class Saml2Service
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* Handles any app-specific SAML tasks.
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* @package BookStack\Services
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*/
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class Saml2Service
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{
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protected $config;
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protected $userRepo;
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protected $user;
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protected $enabled;
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/**
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* Saml2Service constructor.
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* @param \BookStack\Auth\UserRepo $userRepo
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*/
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public function __construct(UserRepo $userRepo, User $user)
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{
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$this->config = config('services.saml');
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$this->userRepo = $userRepo;
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$this->user = $user;
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$this->enabled = config('saml2_settings.enabled') === true;
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}
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/**
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* Check if groups should be synced.
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* @return bool
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*/
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public function shouldSyncGroups()
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{
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return $this->enabled && $this->config['user_to_groups'] !== false;
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}
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/**
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* Extract the details of a user from a SAML response.
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* @param $samlID
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* @param $samlAttributes
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* @return array
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*/
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public function getUserDetails($samlID, $samlAttributes)
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{
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$emailAttr = $this->config['email_attribute'];
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$displayNameAttr = $this->config['display_name_attribute'];
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$userNameAttr = $this->config['user_name_attribute'];
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$email = $this->getSamlResponseAttribute($samlAttributes, $emailAttr, null);
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if ($userNameAttr === null) {
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$userName = $samlID;
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} else {
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$userName = $this->getSamlResponseAttribute($samlAttributes, $userNameAttr, $samlID);
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}
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$displayName = [];
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foreach ($displayNameAttr as $dnAttr) {
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$dnComponent = $this->getSamlResponseAttribute($samlAttributes, $dnAttr, null);
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if ($dnComponent !== null) {
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$displayName[] = $dnComponent;
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}
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}
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if (count($displayName) == 0) {
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$displayName = $userName;
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} else {
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$displayName = implode(' ', $displayName);
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}
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return [
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'uid' => $userName,
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'name' => $displayName,
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'dn' => $samlID,
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'email' => $email,
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];
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}
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/**
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* Get the groups a user is a part of from the SAML response.
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* @param array $samlAttributes
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* @return array
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*/
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public function getUserGroups($samlAttributes)
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{
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$groupsAttr = $this->config['group_attribute'];
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$userGroups = $samlAttributes[$groupsAttr];
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if (!is_array($userGroups)) {
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$userGroups = [];
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}
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return $userGroups;
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}
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/**
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* Get a property from an SAML response.
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* Handles properties potentially being an array.
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* @param array $userDetails
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* @param string $propertyKey
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* @param $defaultValue
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* @return mixed
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*/
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protected function getSamlResponseAttribute(array $samlAttributes, string $propertyKey, $defaultValue)
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{
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if (isset($samlAttributes[$propertyKey])) {
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$data = $samlAttributes[$propertyKey];
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if (!is_array($data)) {
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return $data;
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} else if (count($data) == 0) {
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return $defaultValue;
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} else if (count($data) == 1) {
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return $data[0];
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} else {
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return $data;
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}
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}
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return $defaultValue;
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}
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protected function registerUser($userDetails) {
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// Create an array of the user data to create a new user instance
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$userData = [
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'name' => $userDetails['name'],
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'email' => $userDetails['email'],
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'password' => str_random(30),
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'external_auth_id' => $userDetails['uid'],
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'email_confirmed' => true,
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];
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$user = $this->user->forceCreate($userData);
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$this->userRepo->attachDefaultRole($user);
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$this->userRepo->downloadAndAssignUserAvatar($user);
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return $user;
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}
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public function processLoginCallback($samlID, $samlAttributes) {
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$userDetails = $this->getUserDetails($samlID, $samlAttributes);
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$user = $this->user
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->where('external_auth_id', $userDetails['uid'])
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->first();
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$isLoggedIn = auth()->check();
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if (!$isLoggedIn) {
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if ($user === null && config('services.saml.auto_register') === true) {
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$user = $this->registerUser($userDetails);
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}
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if ($user !== null) {
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auth()->login($user);
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}
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}
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return $user;
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}
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/**
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* Sync the SAML groups to the user roles for the current user
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* @param \BookStack\Auth\User $user
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* @param array $samlAttributes
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*/
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public function syncGroups(User $user, array $samlAttributes)
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{
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$userSamlGroups = $this->getUserGroups($samlAttributes);
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// Get the ids for the roles from the names
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$samlGroupsAsRoles = $this->matchSamlGroupsToSystemsRoles($userSamlGroups);
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// Sync groups
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if ($this->config['remove_from_groups']) {
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$user->roles()->sync($samlGroupsAsRoles);
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$this->userRepo->attachDefaultRole($user);
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} else {
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$user->roles()->syncWithoutDetaching($samlGroupsAsRoles);
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}
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}
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/**
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* Match an array of group names from SAML to BookStack system roles.
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* Formats group names to be lower-case and hyphenated.
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* @param array $groupNames
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* @return \Illuminate\Support\Collection
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*/
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protected function matchSamlGroupsToSystemsRoles(array $groupNames)
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{
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foreach ($groupNames as $i => $groupName) {
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$groupNames[$i] = str_replace(' ', '-', trim(strtolower($groupName)));
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}
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$roles = Role::query()->where(function (Builder $query) use ($groupNames) {
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$query->whereIn('name', $groupNames);
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foreach ($groupNames as $groupName) {
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$query->orWhere('external_auth_id', 'LIKE', '%' . $groupName . '%');
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}
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})->get();
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$matchedRoles = $roles->filter(function (Role $role) use ($groupNames) {
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return $this->roleMatchesGroupNames($role, $groupNames);
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});
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return $matchedRoles->pluck('id');
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}
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/**
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* Check a role against an array of group names to see if it matches.
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* Checked against role 'external_auth_id' if set otherwise the name of the role.
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* @param \BookStack\Auth\Role $role
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* @param array $groupNames
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* @return bool
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*/
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protected function roleMatchesGroupNames(Role $role, array $groupNames)
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{
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if ($role->external_auth_id) {
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$externalAuthIds = explode(',', strtolower($role->external_auth_id));
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foreach ($externalAuthIds as $externalAuthId) {
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if (in_array(trim($externalAuthId), $groupNames)) {
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return true;
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}
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}
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return false;
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}
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$roleName = str_replace(' ', '-', trim(strtolower($role->display_name)));
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return in_array($roleName, $groupNames);
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}
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}
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