X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=include%2Fsecurity.php;h=9f160e7884cbada1f9691d362eb936604ba491f9;hb=68e0324c1b50b18f78a754553d487cc20b8de6b1;hp=394986f279ca8146835becd621ef71507b0ec30f;hpb=167ab537b51cf76016e89c705aca812968cb6b82;p=friendica.git diff --git a/include/security.php b/include/security.php old mode 100755 new mode 100644 index 394986f279..9f160e7884 --- a/include/security.php +++ b/include/security.php @@ -1,14 +1,16 @@ get_baseurl() . '/profile/' . $user_record['nickname']; + $_SESSION['my_address'] = $user_record['nickname'] . '@' . substr($a->get_baseurl(),strpos($a->get_baseurl(),'://')+3); $_SESSION['addr'] = $_SERVER['REMOTE_ADDR']; $a->user = $user_record; @@ -35,6 +37,7 @@ function authenticate_success($user_record, $login_initial = false, $interactive } $master_record = $a->user; + if((x($_SESSION,'submanage')) && intval($_SESSION['submanage'])) { $r = q("select * from user where uid = %d limit 1", intval($_SESSION['submanage']) @@ -43,22 +46,28 @@ function authenticate_success($user_record, $login_initial = false, $interactive $master_record = $r[0]; } - $r = q("SELECT `uid`,`username`,`nickname` FROM `user` WHERE `password` = '%s' AND `email` = '%s'", + $r = q("SELECT `uid`,`username`,`nickname` FROM `user` WHERE `password` = '%s' AND `email` = '%s' AND `account_removed` = 0 ", dbesc($master_record['password']), dbesc($master_record['email']) ); - if(count($r)) + if($r && count($r)) $a->identities = $r; else $a->identities = array(); - $r = q("select `user`.`uid`, `user`.`username`, `user`.`nickname` from manage left join user on manage.mid = user.uid - where `manage`.`uid` = %d", + $r = q("select `user`.`uid`, `user`.`username`, `user`.`nickname` + from manage left join user on manage.mid = user.uid where `user`.`account_removed` = 0 + and `manage`.`uid` = %d", intval($master_record['uid']) ); - if(count($r)) + if($r && count($r)) $a->identities = array_merge($a->identities,$r); + if($login_initial) + logger('auth_identities: ' . print_r($a->identities,true), LOGGER_DEBUG); + if($login_refresh) + logger('auth_identities refresh: ' . print_r($a->identities,true), LOGGER_DEBUG); + $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1", intval($_SESSION['uid'])); if(count($r)) { @@ -69,15 +78,16 @@ function authenticate_success($user_record, $login_initial = false, $interactive header('X-Account-Management-Status: active; name="' . $a->user['username'] . '"; id="' . $a->user['nickname'] .'"'); - if($login_initial) { - $l = get_language(); + if($login_initial || $login_refresh) { + $l = get_browser_language(); q("UPDATE `user` SET `login_date` = '%s', `language` = '%s' WHERE `uid` = %d LIMIT 1", dbesc(datetime_convert()), dbesc($l), intval($_SESSION['uid']) ); - + } + if($login_initial) { call_hooks('logged_in', $a->user); if(($a->module !== 'home') && isset($_SESSION['return_url'])) @@ -103,23 +113,42 @@ function can_write_wall(&$a,$owner) { if(remote_user()) { - // user remembered decision and avoid a DB lookup for each and every display item + // use remembered decision and avoid a DB lookup for each and every display item // DO NOT use this function if there are going to be multiple owners + // We have a contact-id for an authenticated remote user, this block determines if the contact + // belongs to this page owner, and has the necessary permissions to post content + if($verified === 2) return true; elseif($verified === 1) return false; else { + $cid = 0; + + if(is_array($_SESSION['remote'])) { + foreach($_SESSION['remote'] as $visitor) { + if($visitor['uid'] == $owner) { + $cid = $visitor['cid']; + break; + } + } + } + + if(! $cid) + return false; + + $r = q("SELECT `contact`.*, `user`.`page-flags` FROM `contact` LEFT JOIN `user` on `user`.`uid` = `contact`.`uid` WHERE `contact`.`uid` = %d AND `contact`.`id` = %d AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0 AND `user`.`blockwall` = 0 AND `readonly` = 0 AND ( `contact`.`rel` IN ( %d , %d ) OR `user`.`page-flags` = %d ) LIMIT 1", intval($owner), - intval(remote_user()), + intval($cid), intval(CONTACT_IS_SHARING), intval(CONTACT_IS_FRIEND), intval(PAGE_COMMUNITY) ); + if(count($r)) { $verified = 2; return true; @@ -188,18 +217,189 @@ function permissions_sql($owner_id,$remote_verified = false,$groups = null) { $gs .= '|<' . intval($g) . '>'; } - $sql = sprintf( + /*$sql = sprintf( " AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' ) AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' ) AND ( allow_gid = '' OR allow_gid REGEXP '%s' ) - AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s') + AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s') + ", + intval($remote_user), + intval($remote_user), + dbesc($gs), + dbesc($gs) + );*/ + $sql = sprintf( + " AND ( NOT (deny_cid REGEXP '<%d>' OR deny_gid REGEXP '%s') + AND ( allow_cid REGEXP '<%d>' OR allow_gid REGEXP '%s' OR ( allow_cid = '' AND allow_gid = '') ) + ) + ", + intval($remote_user), + dbesc($gs), + intval($remote_user), + dbesc($gs) + ); + } + } + return $sql; +} + + +function item_permissions_sql($owner_id,$remote_verified = false,$groups = null) { + + $local_user = local_user(); + $remote_user = remote_user(); + + /** + * Construct permissions + * + * default permissions - anonymous user + */ + + $sql = " AND allow_cid = '' + AND allow_gid = '' + AND deny_cid = '' + AND deny_gid = '' + AND private = 0 + "; + + /** + * Profile owner - everything is visible + */ + + if($local_user && ($local_user == $owner_id)) { + $sql = ''; + } + + /** + * Authenticated visitor. Unless pre-verified, + * check that the contact belongs to this $owner_id + * and load the groups the visitor belongs to. + * If pre-verified, the caller is expected to have already + * done this and passed the groups into this function. + */ + + elseif($remote_user) { + + if(! $remote_verified) { + $r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1", + intval($remote_user), + intval($owner_id) + ); + if(count($r)) { + $remote_verified = true; + $groups = init_groups_visitor($remote_user); + } + } + if($remote_verified) { + + $gs = '<<>>'; // should be impossible to match + + if(is_array($groups) && count($groups)) { + foreach($groups as $g) + $gs .= '|<' . intval($g) . '>'; + } + + $sql = sprintf( + /*" AND ( private = 0 OR ( private in (1,2) AND wall = 1 AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' ) + AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' ) + AND ( allow_gid = '' OR allow_gid REGEXP '%s' ) + AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s'))) ", intval($remote_user), intval($remote_user), dbesc($gs), dbesc($gs) +*/ + " AND ( private = 0 OR ( private in (1,2) AND wall = 1 + AND ( NOT (deny_cid REGEXP '<%d>' OR deny_gid REGEXP '%s') + AND ( allow_cid REGEXP '<%d>' OR allow_gid REGEXP '%s' OR ( allow_cid = '' AND allow_gid = ''))))) + ", + intval($remote_user), + dbesc($gs), + intval($remote_user), + dbesc($gs) ); } } + return $sql; -} \ No newline at end of file +} + + +/* + * Functions used to protect against Cross-Site Request Forgery + * The security token has to base on at least one value that an attacker can't know - here it's the session ID and the private key. + * In this implementation, a security token is reusable (if the user submits a form, goes back and resubmits the form, maybe with small changes; + * or if the security token is used for ajax-calls that happen several times), but only valid for a certain amout of time (3hours). + * The "typename" seperates the security tokens of different types of forms. This could be relevant in the following case: + * A security token is used to protekt a link from CSRF (e.g. the "delete this profile"-link). + * If the new page contains by any chance external elements, then the used security token is exposed by the referrer. + * Actually, important actions should not be triggered by Links / GET-Requests at all, but somethimes they still are, + * so this mechanism brings in some damage control (the attacker would be able to forge a request to a form of this type, but not to forms of other types). + */ +function get_form_security_token($typename = '') { + $a = get_app(); + + $timestamp = time(); + $sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $timestamp . $typename); + + return $timestamp . '.' . $sec_hash; +} + +function check_form_security_token($typename = '', $formname = 'form_security_token') { + if (!x($_REQUEST, $formname)) return false; + $hash = $_REQUEST[$formname]; + + $max_livetime = 10800; // 3 hours + + $a = get_app(); + + $x = explode('.', $hash); + if (time() > (IntVal($x[0]) + $max_livetime)) return false; + + $sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $x[0] . $typename); + + return ($sec_hash == $x[1]); +} + +function check_form_security_std_err_msg() { + return t('The form security token was not correct. This probably happened because the form has been opened for too long (>3 hours) before submitting it.') . EOL; +} +function check_form_security_token_redirectOnErr($err_redirect, $typename = '', $formname = 'form_security_token') { + if (!check_form_security_token($typename, $formname)) { + $a = get_app(); + logger('check_form_security_token failed: user ' . $a->user['guid'] . ' - form element ' . $typename); + logger('check_form_security_token failed: _REQUEST data: ' . print_r($_REQUEST, true), LOGGER_DATA); + notice( check_form_security_std_err_msg() ); + goaway($a->get_baseurl() . $err_redirect ); + } +} +function check_form_security_token_ForbiddenOnErr($typename = '', $formname = 'form_security_token') { + if (!check_form_security_token($typename, $formname)) { + $a = get_app(); + logger('check_form_security_token failed: user ' . $a->user['guid'] . ' - form element ' . $typename); + logger('check_form_security_token failed: _REQUEST data: ' . print_r($_REQUEST, true), LOGGER_DATA); + header('HTTP/1.1 403 Forbidden'); + killme(); + } +} + +// Returns an array of group id's this contact is a member of. +// This array will only contain group id's related to the uid of this +// DFRN contact. They are *not* neccessarily unique across the entire site. + + +if(! function_exists('init_groups_visitor')) { +function init_groups_visitor($contact_id) { + $groups = array(); + $r = q("SELECT `gid` FROM `group_member` + WHERE `contact-id` = %d ", + intval($contact_id) + ); + if(count($r)) { + foreach($r as $rr) + $groups[] = $rr['gid']; + } + return $groups; +}} +