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<?php |
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namespace Metaclassing\EnterpriseAuth\Controllers; |
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use Illuminate\Routing\Controller; |
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class AuthController extends Controller |
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{ |
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protected $azureActiveDirectory; |
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public function __construct() |
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{ |
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$tenant = config('enterpriseauth.credentials.tenant'); |
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$this->azureActiveDirectory = new \Metaclassing\EnterpriseAuth\AzureActiveDirectory($tenant); |
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} |
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// This is called after a web auth gets an access token, or api auth sends an access token |
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public function validateOauthCreateOrUpdateUserAndGroups($accessToken) |
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{ |
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$userData = $this->getMicrosoftGraphSelf($accessToken); |
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$userData = $this->scrubMicrosoftGraphUserData($userData); |
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// This is a laravel \App\User |
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$user = $this->findOrCreateUser($userData); |
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// Try to update the group/role membership for this user |
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$this->updateGroups($user); |
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// Cache the users oauth accss token mapped to their user object for stuff and things |
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$key = '/oauth/tokens/'.$accessToken; |
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$remaining = $this->getTokenMinutesRemaining($accessToken); |
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\Illuminate\Support\Facades\Log::debug('oauth token cached for '.$remaining.' minutes'); |
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// Cache the token until it expires |
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\Cache::put($key, $user, $remaining); |
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return $user; |
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} |
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public function getMicrosoftGraphSelf($accessToken) |
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{ |
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$graph = new \Microsoft\Graph\Graph(); |
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$graph->setAccessToken($accessToken); |
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$user = $graph->createRequest('GET', '/me') |
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->setReturnType(\Microsoft\Graph\Model\User::class) |
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->execute(); |
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return $user->jsonSerialize(); |
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} |
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public function scrubMicrosoftGraphUserData($userData) |
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{ |
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// Fix any stupid crap with missing or null fields |
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if (! isset($userData['mail']) || ! $userData['mail']) { |
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\Illuminate\Support\Facades\Log::debug('graph api did not contain mail field, using userPrincipalName instead '.json_encode($userData)); |
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$userData['mail'] = $userData['userPrincipalName']; |
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} |
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return $userData; |
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} |
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protected function findOrCreateUser($userData) |
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{ |
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// Configurable \App\User type and ID field name |
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$userType = config('enterpriseauth.user_class'); |
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$userIdField = config('enterpriseauth.user_id_field'); |
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// Try to find an existing user |
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$user = $userType::where($userIdField, $userData['id'])->first(); |
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// If we dont have an existing user |
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if (! $user) { |
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// Go create a new one with this data |
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$user = $this->createUserFromAzureData($userData); |
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} |
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return $user; |
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} |
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// This takes the azure userdata and makes a new user out of it |
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public function createUserFromAzureData($userData) |
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{ |
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// Config options for user type/id/field map |
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$userType = config('enterpriseauth.user_class'); |
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$userFieldMap = config('enterpriseauth.user_map'); |
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$idField = config('enterpriseauth.user_id_field'); |
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// Should build new \App\User |
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$user = new $userType(); |
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$user->$idField = $userData['id']; |
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// Go through any other fields the config wants us to map |
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foreach ($userFieldMap as $azureField => $userField) { |
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if (isset($userData[$azureField])) { |
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$user->$userField = $userData[$azureField]; |
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} else { |
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\Illuminate\Support\Facades\Log::info('createUserFromAzureData did not contain configured field '.$azureField.' in '.json_encode($userData)); |
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} |
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} |
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// Save our newly minted user |
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$user->save(); |
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return $user; |
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} |
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public function certAuth() |
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{ |
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// get the cert from the webserver and load it into an x509 phpseclib object |
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$cert = $this->loadClientCertFromWebserver(); |
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// extract the UPN from the client cert |
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$upn = $this->getUserPrincipalNameFromClientCert($cert); |
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// get the user if it exists |
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$user_class = config('enterpriseauth.user_class'); |
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// TODO: rewrite this so that if the user doesnt exist we create them and get their groups from AAD |
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$user = $user_class::where('userPrincipalName', $upn)->first(); |
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if (! $user) { |
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throw new \Exception('No user found with user principal name '.$upn); |
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} |
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return $user; |
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} |
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public function loadClientCertFromWebserver() |
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{ |
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// Make sure we got a client certificate from the web server |
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if (! isset($_SERVER['SSL_CLIENT_CERT']) || ! $_SERVER['SSL_CLIENT_CERT']) { |
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throw new \Exception('TLS client certificate missing'); |
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} |
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// try to parse the certificate we got |
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$x509 = new \phpseclib\File\X509(); |
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// NGINX screws up the cert by putting a bunch of tab characters into it so we need to clean those out |
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$asciicert = str_replace("\t", '', $_SERVER['SSL_CLIENT_CERT']); |
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$x509->loadX509($asciicert); |
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return $x509; |
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} |
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public function getUserPrincipalNameFromClientCert($x509) |
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{ |
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$names = $x509->getExtension('id-ce-subjectAltName'); |
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if (! $names) { |
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throw new \Exception('TLS client cert missing subject alternative names'); |
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} |
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// Search subject alt names for user principal name |
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$upn = ''; |
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foreach ($names as $name) { |
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foreach ($name as $key => $value) { |
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if ($key == 'otherName') { |
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if (isset($value['type-id']) && $value['type-id'] == '1.3.6.1.4.1.311.20.2.3') { |
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$upn = $value['value']['utf8String']; |
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} |
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} |
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} |
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} |
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if (! $upn) { |
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throw new \Exception('Could not find user principal name in TLS client cert'); |
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} |
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return $upn; |
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} |
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public function updateGroups($user) |
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{ |
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// See if we can get the users group membership data |
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$groupData = $this->getMicrosoftGraphGroupMembership($user); |
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// Process group data into a list of displayNames we use as roles |
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$groups = []; |
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foreach ($groupData as $info) { |
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// Now there are NEW kinds of awful groups where groupTypes => [Unified] is BAD. |
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// We only want to process groupTypes = [] (empty set evaluates to false) |
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if (isset($info['groupTypes']) && $info['groupTypes'] == false) { |
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$groups[] = $info['displayName']; |
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} else { |
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\Illuminate\Support\Facades\Log::debug('skipping grouptype named '.$info['displayName']); |
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} |
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} |
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// make sure the array of groups is UNIQUE because stupid azuread names are not! |
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$groups = array_unique($groups); |
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// If we have user group information from this oauth attempt |
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\Illuminate\Support\Facades\Log::debug('assigning user to '.count($groups).' groups as roles'); |
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if (count($groups)) { |
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// remove the users existing database roles before assigning new ones |
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\DB::table('assigned_roles') |
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->where('entity_id', $user->id) |
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->where('entity_type', get_class($user)) |
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->delete(); |
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// TRY to add the user to each group they are assigned |
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try { |
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$user->assign($groups); |
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} catch (\Exception $e) { |
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\Illuminate\Support\Facades\Log::debug('unable to add user to groups '.implode(',', $groups).' because'.$e->getMessage()); |
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} |
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} |
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} |
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public function getMicrosoftGraphGroupMembership($user) |
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{ |
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// Get an access token for our application (not the users token) |
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$accessToken = $this->azureActiveDirectory->getApplicationAccessToken(config('enterpriseauth.credentials.client_id'), config('enterpriseauth.credentials.client_secret')); |
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// Use the app access token to get a given users group membership |
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$graph = new \Microsoft\Graph\Graph(); |
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$graph->setAccessToken($accessToken); |
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$path = '/users/'.$user->userPrincipalName.'/memberOf'; |
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// $groups = $graph->createRequest('GET', $path) |
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// $graph->createCollectionRequest('GET', $path)->setReturnType(\Microsoft\Graph\Model\Group::class)->setPageSize(200)->execute(); |
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$groups = $graph->createCollectionRequest('GET', $path) |
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->setReturnType(\Microsoft\Graph\Model\Group::class) |
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->setPageSize(900) |
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->execute(); |
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\Illuminate\Support\Facades\Log::debug('azure ad returned '.count($groups).' groups for user'); |
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// Convert the microsoft graph group objects into data that is useful |
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$groupData = []; |
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foreach ($groups as $group) { |
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$groupData[] = $group->jsonSerialize(); |
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} |
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return $groupData; |
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} |
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// Try to unpack a jwt and get us the 3 chunks as assoc arrays so we can perform token identification |
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public function unpackJwt($jwt) |
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{ |
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list($headb64, $bodyb64, $cryptob64) = explode('.', $jwt); |
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$token = [ |
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'header' => json_decode(\Firebase\JWT\JWT::urlsafeB64Decode($headb64), true), |
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'payload' => json_decode(\Firebase\JWT\JWT::urlsafeB64Decode($bodyb64), true), |
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'signature' => $cryptob64, |
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]; |
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return $token; |
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} |
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// calculate the delta between $jwt['exp'] and time() / 60 for minutes remaining |
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protected function getTokenMinutesRemaining($accessToken) |
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{ |
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$tokenData = $this->unpackJwt($accessToken); |
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$now = time(); |
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$expires = $tokenData['payload']['exp']; |
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$remainingSecs = $expires - $now; |
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// round up to the nearest minute |
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$remainingMins = ceil($remainingSecs / 60); |
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return $remainingMins; |
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} |
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} |
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metaclassing /
PHP7-Laravel5-EnterpriseAuth
Loading history...
This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces.
This is most likely a typographical error or the method has been renamed.