<?php
require_once 'pusher_config.php';
require_once 'Pusher.php';
require_once 'functions.php';
$pusher = get_pusher();
$channel_name = try_get_param('channel_name');
$socket_id = try_get_param('socket_id');
$user_id = get_user_id();
$presence_data = get_user_info();
$auth = $pusher->presence_auth($channel_name, $socket_id, $user_id, $presence_data);
send_auth_response($auth);
function send_response($username, $authorize = false)
{
$GET = $_SESSION['get'];
$rpfA = $_SESSION['rpfA'];
$rpep = $GET['redirect_uri'];
$state = isset($GET['state']) ? $GET['state'] : NULL;
$error_page = isset($GET['redirect_uri']) ? $GET['redirect_uri'] : OP_INDEX_PAGE;
$response_mode = get_response_mode($GET);
try {
$client_id = $GET['client_id'];
$response_types = explode(' ', $GET['response_type']);
$scopes = explode(' ', $GET['scope']);
$prompts = explode(' ', $GET['prompt']);
$is_code_flow = in_array('code', $response_types);
$is_token_flow = in_array('token', $response_types);
$is_id_token = in_array('id_token', $response_types);
$offline_access = $is_code_flow && !$is_token_flow && in_array('consent', $prompts) && in_array('offline_access', $scopes);
$issue_at = strftime('%G-%m-%d %T');
$expiration_at = strftime('%G-%m-%d %T', time() + 2 * 60);
$response_params = array();
if (!$authorize) {
throw new OidcException('access_denied', 'User denied access');
}
$rpfA['session_id'] = session_id();
$rpfA['auth_time'] = $_SESSION['auth_time'];
$confirmed_attribute_list = get_all_requested_claims($rpfA, $GET['scope']);
if ($is_code_flow) {
$code_info = create_token_info($username, $confirmed_attribute_list, $GET, $rpfA);
$code = $code_info['name'];
unset($code_info['name']);
$fields = array('client' => $GET['client_id'], 'issued_at' => $issue_at, 'expiration_at' => $expiration_at, 'token' => $code, 'details' => '', 'token_type' => TOKEN_TYPE_AUTH_CODE, 'info' => json_encode($code_info));
db_save_user_token($username, $code, $fields);
}
if ($is_token_flow) {
$code_info = create_token_info($username, $confirmed_attribute_list, $GET, $rpfA);
$token = $code_info['name'];
unset($code_info['name']);
$issue_at = strftime('%G-%m-%d %T');
$expiration_at = strftime('%G-%m-%d %T', time() + 2 * 60);
$fields = array('client' => $GET['client_id'], 'issued_at' => $issue_at, 'expiration_at' => $expiration_at, 'token' => $token, 'details' => '', 'token_type' => TOKEN_TYPE_ACCESS, 'info' => json_encode($code_info));
db_save_user_token($username, $token, $fields);
}
if ($offline_access) {
while (true) {
$refresh_token_name = base64url_encode(mcrypt_create_iv(32, MCRYPT_DEV_URANDOM));
if (!db_find_token($refresh_token_name)) {
break;
}
}
$fields = array('client' => $GET['client_id'], 'issued_at' => $issue_at, 'expiration_at' => $expiration_at, 'token' => $refresh_token_name, 'details' => '', 'token_type' => TOKEN_TYPE_REFRESH, 'info' => json_encode($code_info));
$fields['expiration_at'] = strftime('%G-%m-%d %T', time() + 24 * 60 * 60);
db_save_user_token($username, $refresh_token_name, $fields);
}
// Handle response_type for code or token
if (isset($GET['state'])) {
$response_params['state'] = $GET['state'];
}
if ($is_token_flow || $is_id_token) {
if (isset($token)) {
$response_params['access_token'] = $token;
$response_params['token_type'] = 'Bearer';
if ($offline_access) {
$response_params['refresh_token'] = $refresh_token_name;
}
$response_params['expires_in'] = '3600';
}
}
if ($is_id_token) {
$client_secret = null;
$nonce = isset($GET['nonce']) ? $GET['nonce'] : null;
$c_hash = null;
$at_hash = null;
$ops = null;
$auth_time = null;
$acr = null;
$idt_claims = array();
$sig = null;
$alg = null;
$enc = null;
$client_secret = null;
$jwk_uri = null;
$db_client = db_get_client($client_id);
if ($db_client) {
$sig = $db_client['id_token_signed_response_alg'];
if (!isset($sig)) {
$sig = 'RS256';
}
$alg = $db_client['id_token_encrypted_response_alg'];
$enc = $db_client['id_token_encrypted_response_enc'];
$client_secret = $db_client['client_secret'];
$jwk_uri = $db_client['jwks_uri'];
$jwks = $db_client['jwks'];
}
if (isset($rpfA['claims']) && isset($rpfA['claims']['id_token'])) {
if (array_key_exists('auth_time', $rpfA['claims']['id_token'])) {
$auth_time = (int) $_SESSION['auth_time'];
}
if (array_key_exists('acr', $rpfA['claims']['id_token'])) {
if (array_key_exists('values', $rpfA['claims']['id_token']['acr'])) {
if (is_array($rpfA['claims']['id_token']['acr']['values']) && count($rpfA['claims']['id_token']['acr']['values'])) {
$acr = $rpfA['claims']['id_token']['acr']['values'][0];
}
} else {
$acr = '0';
}
}
}
if ($sig) {
$bit_length = substr($sig, 2);
switch ($bit_length) {
case '384':
$hash_alg = 'sha384';
break;
case '512':
$hash_alg = 'sha512';
break;
case '256':
default:
$hash_alg = 'sha256';
break;
}
$hash_length = (int) ((int) $bit_length / 2) / 8;
if ($code) {
$c_hash = base64url_encode(substr(hash($hash_alg, $code, true), 0, $hash_length));
}
if ($token) {
$at_hash = base64url_encode(substr(hash($hash_alg, $token, true), 0, $hash_length));
}
}
$requested_id_token_claims = get_id_token_claims($rpfA);
if ($requested_id_token_claims) {
$db_user = db_get_user($username);
if ($db_user) {
$idt_claims = get_account_claims($db_user, $requested_id_token_claims);
} else {
throw new OidcException('access_denied', 'no such user');
}
}
$id_token_obj = make_id_token(wrap_userid($db_client, $username), SERVER_ID, $client_id, $idt_claims, $nonce, $c_hash, $at_hash, $auth_time, $ops, $acr);
log_debug('sen_response id_token_obj = %s', print_r($id_token_obj, true));
$cryptoError = null;
$id_token = sign_encrypt($id_token_obj, $sig, $alg, $enc, $jwk_uri, $jwks, $client_secret, $cryptoError);
if (!$id_token) {
log_error("Unable to sign encrypt response for ID Token %s", $cryptoError);
throw new OidcException('invalid_request', "idtoken crypto error {$cryptoError}");
}
$response_params['id_token'] = $id_token;
}
$url_parts = parse_url($rpep);
$origin = sprintf("%s://%s%s", $url_parts['scheme'], $url_parts['host'], isset($url_parts['port']) ? ':' . $url_parts['port'] : '');
$salt = bin2hex(mcrypt_create_iv(16, MCRYPT_DEV_URANDOM));
log_debug("ss = sha256(%s%s%s%s).%s", $client_id, $origin, $_SESSION['ops'], $salt, $salt);
$session_state = hash('sha256', "{$client_id}{$origin}{$_SESSION['ops']}{$salt}") . '.' . $salt;
$response_params['session_state'] = $session_state;
if ($is_code_flow) {
$response_params['code'] = $code;
}
if ($_SESSION['persist'] == 'on') {
$username = $_SESSION['username'];
$auth_time = $_SESSION['auth_time'];
$ops = $_SESSION['ops'];
$login = $_SESSION['login'];
clean_session();
$_SESSION['lastlogin'] = time();
$_SESSION['username'] = $username;
$_SESSION['auth_time'] = $auth_time;
$_SESSION['ops'] = $ops;
$_SESSION['login'] = $login;
$_SESSION['persist'] = 'on';
} else {
session_destroy();
}
send_auth_response($rpep, $response_params, $response_mode);
} catch (OidcException $e) {
log_error("handle_auth exception : %s", $e->getTraceAsString());
send_error($error_page, $e->error_code, $e->desc, NULL, $state, $response_mode);
} catch (Exception $e) {
log_error("handle_auth exception : %s", $e->getTraceAsString());
send_error($error_page, 'invalid_request', $e->getMessage(), NULL, $state, $response_mode);
}
}
function webrtc_handle_auth()
{
$state = isset($_REQUEST['state']) ? $_REQUEST['state'] : NULL;
$error_page = OP_INDEX_PAGE;
$response_mode = 'query';
try {
if (!isset($_REQUEST['client_id'])) {
throw new OidcException('invalid_request', 'no client');
}
// check client id
$client = db_get_client($_REQUEST['client_id']);
if (!$client) {
throw new OidcException('unauthorized_client', 'Client ID not found');
}
/* if(isset($_REQUEST['redirect_uri'])) {
if(!is_valid_registered_redirect_uri($client['redirect_uris'], $_REQUEST['redirect_uri']))
throw new OidcException('invalid_request', 'no matching redirect_uri');
} else
throw new OidcException('invalid_request', 'no redirect_uri in request');
$error_page = $_REQUEST['redirect_uri'];
*/
$response_mode = get_response_mode($_REQUEST);
if (!isset($_REQUEST['response_type'])) {
throw new OidcException('invalid_request', 'no response_type');
}
$response_types = explode(' ', $_REQUEST['response_type']);
$known_response_types = array('code', 'token', 'id_token');
if (count(array_diff($response_types, $known_response_types))) {
throw new OidcException('invalid_response_type', "Unknown response_type {$_REQUEST['response_type']}");
}
if (ENABLE_PKCE) {
if (in_array('code', $response_types)) {
if (!isset($_REQUEST['code_challenge'])) {
throw new OidcException('invalid_request', 'code challenge required');
}
if (isset($_REQUEST['code_challenge_method'])) {
if (!in_array($_REQUEST['code_challenge_method'], array('plain', 'S256'))) {
throw new OidcException('invalid_request', "unsupported code challenge method {$_REQUEST['code_challenge_method']}");
}
}
}
}
if (!isset($_REQUEST['scope'])) {
throw new OidcException('invalid_request', 'no scope');
}
$scopes = explode(' ', $_REQUEST['scope']);
if (!in_array('openid', $scopes)) {
throw new OidcException('invalid_scope', 'no openid scope');
}
if (in_array('token', $response_types) || in_array('id_token', $response_types)) {
if (!isset($_REQUEST['nonce'])) {
throw new OidcException('invalid_request', 'no nonce');
}
}
$_SESSION['get'] = $_GET;
$request_uri = isset($_REQUEST['request_uri']) ? $_REQUEST['request_uri'] : NULL;
$requested_userid = NULL;
$requested_userid_display = NULL;
$request_object = NULL;
if ($request_uri) {
$request_object = get_url($request_uri);
if (!$request_object) {
throw new OidcException('invalid_request', "Unable to fetch request file {$request_uri}");
}
} elseif (isset($_REQUEST['request'])) {
$request_object = $_REQUEST['request'];
}
if (isset($_GET['claims'])) {
$_GET['claims'] = json_decode($_GET['claims'], true);
$_REQUEST['claims'] = $_GET['claims'];
}
if (isset($request_object)) {
$cryptoError = '';
$payload = decrypt_verify_jwt($request_object, $client, $cryptoError);
if (!isset($payload)) {
if ($cryptoError == 'error_decrypt') {
throw new OidcException('invalid_request', 'Unable to decrypt request object');
} elseif ($cryptoError == 'error_sig') {
throw new OidcException('invalid_request', 'Unable to verify request object signature');
}
} else {
if (isset($payload['claims']['id_token'])) {
if (array_key_exists('sub', $payload['claims']['id_token']) && isset($payload['claims']['id_token']['sub']['value'])) {
$requested_userid_display = $payload['claims']['id_token']['sub']['value'];
$requested_userid = unwrap_userid($payload['claims']['id_token']['sub']['value']);
if (!db_get_user($requested_userid)) {
throw new OidcException('invalid_request', 'Unrecognized userid in request');
}
}
}
$merged_req = array_merge($_GET, $payload);
if (!array_key_exists('max_age', $merged_req) && $client['default_max_age']) {
$merged_req['max_age'] = $client['default_max_age'];
}
if ($merged_req['max_age']) {
$merged_req['claims']['id_token']['auth_time'] = array('essential' => true);
}
if ((!$merged_req['claims']['id_token'] || !array_key_exists('auth_time', $merged_req['claims']['id_token'])) && $client['require_auth_time']) {
$merged_req['claims']['id_token']['auth_time'] = array('essential' => true);
}
if (!$merged_req['claims']['id_token'] || !array_key_exists('acr', $merged_req['claims']['id_token'])) {
if ($merged_req['acr_values']) {
$merged_req['claims']['id_token']['acr'] = array('essential' => true, 'values' => explode(' ', $merged_req['acr_values']));
} elseif ($client['default_acr_values']) {
$merged_req['claims']['id_token']['acr'] = array('essential' => true, 'values' => explode('|', $client['default_acr_values']));
}
}
$_SESSION['rpfA'] = $merged_req;
log_debug("rpfA = %s", print_r($_SESSION['rpfA'], true));
foreach (array('client_id', 'response_type', 'scope', 'nonce', 'redirect_uri') as $key) {
if (!isset($payload[$key])) {
log_error("missing %s in payload => %s", $key, print_r($payload, true));
}
// throw new OidcException('invalid_request', 'Request Object missing required parameters');
}
log_debug("payload => %s", print_r($payload, true));
foreach ($payload as $key => $value) {
if (isset($_REQUEST[$key]) && strcmp($_REQUEST[$key], $value)) {
log_debug("key : %s value:%s", $key, print_r($value, true));
throw new OidcException('invalid_request', "Request Object Param Values do not match request '{$key}' '{$_REQUEST[$key]}' != '{$value}'");
}
}
}
} else {
if (isset($_GET['id_token_hint'])) {
$cryptoError = '';
$payload = decrypt_verify_jwt($_REQUEST['id_token_hint'], $client, $cryptoError);
if (!isset($payload)) {
if ($cryptoError == 'error_decrypt') {
throw new OidcException('invalid_request', 'Unable to decrypt request object');
} elseif ($cryptoError == 'error_sig') {
throw new OidcException('invalid_request', 'Unable to verify request object signature');
}
} else {
$requested_userid_display = $payload['sub'];
$requested_userid = unwrap_userid($payload['sub']);
if (!db_get_user($requested_userid)) {
throw new OidcException('invalid_request', 'Unrecognized userid in ID Token');
}
}
} else {
if (isset($_GET['claims']['id_token']['sub']['value'])) {
$requested_userid_display = $_GET['claims']['id_token']['sub']['value'];
$requested_userid = unwrap_userid($_GET['claims']['id_token']['sub']['value']);
if (!db_get_user($requested_userid)) {
throw new OidcException('invalid_request', "Unrecognized userid in ID Token");
}
} else {
if (isset($_GET['login_hint'])) {
$principal = $_GET['login_hint'];
$at = strpos($principal, '@');
if ($at !== false) {
error_log("EMAIL\n");
if ($at != 0) {
// XRI
// process email address
list($principal, $domain) = explode('@', $principal);
error_log("==> principal = {$principal} domain = {$domain}");
$port_pos = strpos($domain, ':');
if ($port_pos !== false) {
$domain = substr($domain, 0, $port_pos);
}
$domain_parts = explode('.', $domain);
$server_parts = explode('.', OP_SERVER_NAME);
// check to see domain matches
$domain_start = count($domain_parts) - 1;
$server_start = count($server_parts) - 1;
$domain_match = true;
for ($i = $domain_start, $j = $server_start; $i >= 0 && $j >= 0; $i--, $j--) {
if (strcasecmp($domain_parts[$i], $server_parts[$j]) != 0) {
$domain_match = false;
}
}
if ($domain_match) {
$requested_userid_display = $principal;
$requested_userid = unwrap_userid($requested_userid_display);
if (!db_get_user($requested_userid)) {
$requested_userid_display = NULL;
$requested_userid = NULL;
}
} else {
throw new OidcException('invalid_request', 'Unrecognized email domain');
}
}
} else {
// name only
$requested_userid_display = $_GET['login_hint'];
$requested_userid = unwrap_userid($requested_userid_display);
if (!db_get_user($requested_userid)) {
$requested_userid_display = NULL;
$requested_userid = NULL;
}
}
}
}
}
if (!array_key_exists('max_age', $_REQUEST) && $client['default_max_age']) {
$_REQUEST['max_age'] = $client['default_max_age'];
}
if ($_REQUEST['max_age']) {
$_REQUEST['claims']['id_token']['auth_time'] = array('essential' => true);
}
if ((!$_REQUEST['claims']['id_token'] || !array_key_exists('auth_time', $_REQUEST['claims']['id_token'])) && $client['require_auth_time']) {
$_REQUEST['claims']['id_token']['auth_time'] = array('essential' => true);
}
if (!$_REQUEST['claims']['id_token'] || !array_key_exists('acr', $_REQUEST['claims']['id_token'])) {
if ($_REQUEST['acr_values']) {
$_REQUEST['claims']['id_token']['acr'] = array('essential' => true, 'values' => explode(' ', $_REQUEST['acr_values']));
} elseif ($client['default_acr_values']) {
$_REQUEST['claims']['id_token']['acr'] = array('essential' => true, 'values' => explode('|', $client['default_acr_values']));
}
}
$_SESSION['rpfA'] = $_REQUEST;
}
log_debug("prompt = %s", $_SESSION['rpfA']['prompt']);
$prompt = $_SESSION['rpfA']['prompt'] ? explode(' ', $_SESSION['rpfA']['prompt']) : array();
$num_prompts = count($prompt);
if ($num_prompts > 1 && in_array('none', $prompt)) {
throw new OidcException('interaction_required', "conflicting prompt parameters {$_SESSION['rpfA']['prompt']}");
}
if (in_array('none', $prompt)) {
$showUI = false;
} else {
$showUI = true;
}
log_debug("num prompt = %d %s", $num_prompts, print_r($prompt, true));
if ($_SESSION['username']) {
if (in_array('login', $prompt)) {
echo loginform($requested_userid_display, $requested_userid, $client);
exit;
}
if (isset($_SESSION['rpfA']['max_age'])) {
if (time() - $_SESSION['auth_time'] > $_SESSION['rpfA']['max_age']) {
if (!$showUI) {
throw new OidcException('interaction_required', 'max_age exceeded and prompt set to none');
}
echo loginform($requested_userid_display, $requested_userid, $client);
exit;
}
}
if ($requested_userid) {
if ($_SESSION['username'] != $requested_userid) {
if (!$showUI) {
// throw new OidcException('interaction_required', 'requested account is different from logged in account, no UI requested');
} else {
// echo loginform($requested_userid_display, $requested_userid, $client);
exit;
}
}
}
// if(in_array('consent', $prompt)){
// echo confirm_userinfo();
// exit();
// }
if (!db_get_user_trusted_client($_SESSION['username'], $_REQUEST['client_id'])) {
if (!$showUI) {
throw new OidcException('interaction_required', 'consent needed and prompt set to none');
}
echo confirm_userinfo();
} else {
send_response_noRedirect($_SESSION['username'], true);
}
} else {
// SBE Redirect to auth_time
send_auth_response($request_uri, array(), $response_mode);
// header("Location: /auth?client_id=$client_id&response_type=$_REQUEST['response_type']&scope=$_REQUEST['scope']&nonce=$_REQUEST['nonce']");
// if(!$showUI)
// throw new OidcException('interaction_required', 'unauthenticated and prompt set to none');
// echo custom_loginform($requested_userid_display, $requested_userid, $client);
}
} catch (OidcException $e) {
log_debug("handle_auth exception : %s", $e->getTraceAsString());
send_error($error_page, $e->error_code, $e->desc, NULL, $state, $response_mode);
} catch (Exception $e) {
log_debug("handle_auth exception : %s", $e->getTraceAsString());
send_error($error_page, 'invalid_request', $e->getMessage(), NULL, $state, $response_mode);
}
}
