--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/yubikey/auth.php Fri Jun 30 17:49:12 2017 -0400
@@ -0,0 +1,325 @@
+<?php
+
+if ( getConfig('yubikey_enable', '1') != '1' )
+ return true;
+
+// hook into auth
+$plugins->attachHook('login_process_userdata_json', 'return yubikey_auth_hook_json($userinfo, $req["level"], @$req["remember"]);');
+// hook into special page init
+$plugins->attachHook('session_started', 'yubikey_add_special_pages();');
+// session key security
+$plugins->attachHook('session_key_calc', 'yubikey_sk_calc($user_id, $key_pieces, $sk_mode);');
+
+function yubikey_auth_hook_json(&$userdata, $level, $remember)
+{
+ global $db, $session, $paths, $template, $plugins; // Common objects
+ global $lang;
+
+ $do_validate_otp = false;
+ $do_validate_user = false;
+ $do_validate_pass = false;
+
+ $user_flag = ( $level >= USER_LEVEL_CHPREF ) ? YK_SEC_ELEV_USERNAME : YK_SEC_NORMAL_USERNAME;
+ $pass_flag = ( $level >= USER_LEVEL_CHPREF ) ? YK_SEC_ELEV_PASSWORD : YK_SEC_NORMAL_PASSWORD;
+
+ $auth_log_prefix = ( $level >= USER_LEVEL_CHPREF ) ? 'admin_' : '';
+
+ // Sort of a hack: if the password looks like an OTP and the OTP field is empty, use the password as the OTP
+ if ( empty($userdata['yubikey_otp']) && preg_match('/^[cbdefghijklnrtuv]{44}$/', $userdata['password'] ) )
+ {
+ $userdata['yubikey_otp'] = $userdata['password'];
+ }
+
+ // Lockouts removed from here - they're done during preprocessing now.
+
+ if ( !empty($userdata['username']) )
+ {
+ // get flags
+ $q = $db->sql_query('SELECT user_id, user_yubikey_flags FROM ' . table_prefix . "users WHERE " . ENANO_SQLFUNC_LOWERCASE . "(username) = '" . $db->escape(strtolower($userdata['username'])) . "';");
+ if ( !$q )
+ $db->die_json();
+
+ if ( $db->numrows() < 1 )
+ {
+ // Username not found - let the main login function handle it
+ $db->free_result();
+ return null;
+ }
+ list($user_id, $flags) = $db->fetchrow_num();
+ $flags = intval($flags);
+ // At the point the username is validated.
+ $do_validate_user = false;
+ $do_validate_pass = $flags & $pass_flag;
+ if ( empty($userdata['yubikey_otp']) )
+ {
+ // no OTP was provided
+ // make sure the user has allowed logging in with no OTP
+ if ( !($flags & YK_SEC_ALLOW_NO_OTP) )
+ {
+ // We also might have no Yubikeys enrolled.
+ $q = $db->sql_query('SELECT 1 FROM ' . table_prefix . "yubikey WHERE user_id = $user_id;");
+ if ( !$q )
+ $db->die_json();
+
+ if ( $db->numrows() > 0 )
+ {
+ // Yep at least one key is enrolled.
+ // I don't think these should be logged because they'll usually just be innocent mistakes.
+ $db->free_result();
+ return array(
+ 'mode' => 'error',
+ 'error' => 'yubiauth_err_must_have_otp'
+ );
+ }
+ // Nope, no keys enrolled, user hasn't enabled Yubikey support
+ $db->free_result();
+ }
+ // we're ok, use normal password auth
+ return null;
+ }
+ else
+ {
+ // user did enter an OTP; make sure it's associated with the username
+ $yubi_uid = $db->escape(substr($userdata['yubikey_otp'], 0, 12));
+ $q = $db->sql_query('SELECT user_id FROM ' . table_prefix . 'yubikey WHERE yubi_uid = \'' . $yubi_uid . '\';');
+ if ( !$q )
+ $db->die_json();
+ if ( $db->numrows() < 1 )
+ {
+ $db->free_result();
+ return array(
+ 'mode' => 'error',
+ 'error' => 'yubiauth_err_key_not_authorized'
+ );
+ }
+ list($yubi_pair_uid) = $db->fetchrow_num();
+ if ( $yubi_pair_uid !== $user_id )
+ {
+ return array(
+ 'mode' => 'error',
+ 'error' => 'yubiauth_err_uid_mismatch'
+ );
+ }
+ $db->free_result();
+ $do_validate_otp = true;
+ }
+ }
+ else if ( !empty($userdata['yubikey_otp']) )
+ {
+ // we have an OTP, but no username to work with
+ $yubi_uid = substr($userdata['yubikey_otp'], 0, 12);
+ if ( !preg_match('/^[cbdefghijklnrtuv]{12}$/', $yubi_uid ) )
+ {
+ return array(
+ 'mode' => 'error',
+ 'error' => 'yubiauth_err_invalid_otp'
+ );
+ }
+ $q = $db->sql_query('SELECT u.user_id, u.username, u.user_yubikey_flags FROM ' . table_prefix . "users AS u\n"
+ . " LEFT JOIN " . table_prefix . "yubikey AS y\n"
+ . " ON ( y.user_id = u.user_id )\n"
+ . " WHERE y.yubi_uid = '$yubi_uid'\n"
+ . " GROUP BY u.user_yubikey_flags;");
+ if ( !$q )
+ $db->_die();
+
+ if ( $db->numrows() < 1 )
+ {
+ if ( !$do_validate_pass )
+ $session->sql('INSERT INTO ' . table_prefix . "logs(log_type,action,time_id,date_string,author,edit_summary,page_text) VALUES\n"
+ . ' (\'security\', \'' . $auth_log_prefix . 'auth_bad\', '.time().', \'DEPRECATED\', \'(Yubikey)\', '
+ . '\''.$db->escape($_SERVER['REMOTE_ADDR']).'\', ' . intval($level) . ')');
+
+ return array(
+ 'mode' => 'error',
+ 'error' => 'yubiauth_err_key_not_authorized'
+ );
+ }
+
+ list($user_id, $username, $flags) = $db->fetchrow_num();
+
+ if ( $level > USER_LEVEL_MEMBER )
+ {
+ $session->start();
+ if ( $session->user_logged_in && ($session->user_id !== $user_id) )
+ {
+ return array(
+ 'mode' => 'error',
+ 'error' => 'yubiauth_err_uid_mismatch'
+ );
+ }
+ }
+
+ $do_validate_otp = true;
+ $do_validate_user = $flags & $user_flag;
+ $do_validate_pass = $flags & $pass_flag;
+ // to complete security logs later
+ $userdata['username'] = $username;
+ }
+ else
+ {
+ // Nothing - no username or OTP. This request can't be used; throw it out.
+ return array(
+ 'mode' => 'error',
+ 'error' => 'yubiauth_err_nothing_provided'
+ );
+ }
+
+ if ( $do_validate_otp )
+ {
+ // We need to validate the OTP.
+ $otp_check = yubikey_validate_otp($userdata['yubikey_otp']);
+ if ( !$otp_check['success'] )
+ {
+ if ( !$do_validate_pass )
+ $session->sql('INSERT INTO ' . table_prefix . "logs(log_type,action,time_id,date_string,author,edit_summary,page_text) VALUES\n"
+ . ' (\'security\', \'' . $auth_log_prefix . 'auth_bad\', '.time().', \'DEPRECATED\', \'(Yubikey)\', '
+ . '\''.$db->escape($_SERVER['REMOTE_ADDR']).'\', ' . intval($level) . ')');
+
+ if ( $otp_check['error'] === 'http_failed' )
+ {
+ return array(
+ 'mode' => 'error',
+ 'error' => 'yubiauth_err_' . $otp_check['error'],
+ 'http_error' => $otp_check['http_error']
+ );
+ }
+ return array(
+ 'mode' => 'error',
+ 'error' => 'yubiauth_err_' . $otp_check['error']
+ );
+ }
+ }
+ if ( $do_validate_user )
+ {
+ if ( empty($username) )
+ {
+ return array(
+ 'mode' => 'error',
+ 'error' => 'yubiauth_err_must_have_username'
+ );
+ }
+ if ( strtolower($username) !== strtolower($userdata['username']) )
+ {
+ // Username incorrect
+ if ( !$do_validate_pass )
+ $session->sql('INSERT INTO ' . table_prefix . "logs(log_type,action,time_id,date_string,author,edit_summary,page_text) VALUES\n"
+ . ' (\'security\', \'' . $auth_log_prefix . 'auth_bad\', '.time().', \'DEPRECATED\', \'(Yubikey)\', '
+ . '\''.$db->escape($_SERVER['REMOTE_ADDR']).'\', ' . intval($level) . ')');
+ return array(
+ 'mode' => 'error',
+ 'error' => 'invalid_credentials'
+ );
+ }
+ }
+ // Do we need to have the password validated?
+ if ( $do_validate_pass )
+ {
+ if ( empty($userdata['password']) )
+ {
+ return array(
+ 'mode' => 'error',
+ 'error' => 'yubiauth_err_must_have_password'
+ );
+ }
+ // Yes; return and let the login API continue
+ return null;
+ }
+ else
+ {
+ // No password required; validated, issue session key
+ $session->sql('INSERT INTO ' . table_prefix . "logs(log_type,action,time_id,date_string,author,edit_summary,page_text) VALUES\n"
+ . ' (\'security\', \'' . $auth_log_prefix . 'auth_good\', '.time().', \'DEPRECATED\', \'' . $db->escape($userdata['username']) . '\', '
+ . '\''.$db->escape($_SERVER['REMOTE_ADDR']).'\', ' . intval($level) . ')');
+
+ $q = $db->sql_query('SELECT password FROM ' . table_prefix . "users WHERE user_id = $user_id;");
+ if ( !$q )
+ $db->_die();
+
+ list($password) = $db->fetchrow_num();
+ $db->free_result();
+
+ $session->register_session($user_id, $userdata['username'], $password, intval($level), $remember);
+ return true;
+ }
+}
+
+function yubikey_add_special_pages()
+{
+ global $db, $session, $paths, $template, $plugins; // Common objects
+ global $lang;
+
+ if ( getConfig('yubikey_enable', '1') != '1' )
+ return true;
+
+ $paths->add_page(array(
+ 'name' => $lang->get('yubiauth_specialpage_yubikey'),
+ 'urlname' => 'Yubikey',
+ 'namespace' => 'Special',
+ 'visible' => 0, 'protected' => 0, 'comments_on' => 0, 'special' => 0
+ ));
+}
+
+function yubikey_sk_calc($user_id, &$key_pieces, &$sk_mode)
+{
+ global $db, $session, $paths, $template, $plugins; // Common objects
+ // hash the user's yubikeys
+ $q = $db->sql_query('SELECT yubi_uid FROM ' . table_prefix . "yubikey WHERE user_id = $user_id;");
+ if ( !$q )
+ $db->_die();
+
+ while ( $row = $db->fetchrow() )
+ {
+ $key_pieces[] = $row['yubi_uid'];
+ }
+}
+
+function page_Special_Yubikey()
+{
+ global $db, $session, $paths, $template, $plugins; // Common objects
+
+ header('Content-type: text/javascript');
+ /*
+ if ( isset($_GET['validate_otp']) )
+ {
+ echo enano_json_encode(yubikey_validate_otp($_GET['validate_otp']));
+ return true;
+ }
+ */
+ if ( isset($_GET['get_flags']) || isset($_POST['get_flags']) )
+ {
+ $yubi_uid = substr($_REQUEST['get_flags'], 0, 12);
+ if ( !preg_match('/^[cbdefghijklnrtuv]{12}$/', $yubi_uid) )
+ {
+ return print enano_json_encode(array(
+ 'mode' => 'error',
+ 'error' => 'invalid_otp'
+ ));
+ }
+ $q = $db->sql_query('SELECT u.user_yubikey_flags FROM ' . table_prefix . "users AS u\n"
+ . " LEFT JOIN " . table_prefix . "yubikey AS y\n"
+ . " ON ( y.user_id = u.user_id )\n"
+ . " WHERE y.yubi_uid = '$yubi_uid'\n"
+ . " GROUP BY u.user_yubikey_flags;");
+ if ( !$q )
+ $db->_die();
+
+ if ( $db->numrows() < 1 )
+ {
+ return print enano_json_encode(array(
+ 'mode' => 'error',
+ 'error' => 'key_not_authorized'
+ ));
+ }
+
+ list($flags) = $db->fetchrow_num();
+
+ echo enano_json_encode(array(
+ // We strip YK_SEC_ALLOW_NO_OTP here for security reasons.
+ 'flags' => intval($flags & ~YK_SEC_ALLOW_NO_OTP)
+ ));
+
+ return true;
+ }
+}
+