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-rw-r--r--include/permissions.php338
1 files changed, 338 insertions, 0 deletions
diff --git a/include/permissions.php b/include/permissions.php
new file mode 100644
index 000000000..162f8a71c
--- /dev/null
+++ b/include/permissions.php
@@ -0,0 +1,338 @@
+<?php
+
+
+
+ $global_perms = array(
+ // Read only permissions
+ 'view_stream' => array('channel_r_stream', PERMS_R_STREAM, true),
+ 'view_profile' => array('channel_r_profile', PERMS_R_PROFILE, true),
+ 'view_photos' => array('channel_r_photos', PERMS_R_PHOTOS, true),
+ 'view_contacts' => array('channel_r_abook', PERMS_R_ABOOK, true),
+
+ // Write permissions
+ 'send_stream' => array('channel_w_stream', PERMS_W_STREAM, false),
+ 'post_wall' => array('channel_w_wall', PERMS_W_WALL, false),
+ 'tag_deliver' => array('channel_w_tagwall', PERMS_W_TAGWALL, false),
+ 'post_comments' => array('channel_w_comment', PERMS_W_COMMENT, false),
+ 'post_mail' => array('channel_w_mail', PERMS_W_MAIL, false),
+ 'post_photos' => array('channel_w_photos', PERMS_W_PHOTOS, false),
+ 'chat' => array('channel_w_chat', PERMS_W_CHAT, false),
+ );
+
+
+
+function get_all_perms($uid,$observer) {
+
+ global $global_perms;
+
+ // Save lots of individual lookups
+
+ $r = null;
+ $c = null;
+ $x = null;
+
+ $channel_checked = false;
+ $onsite_checked = false;
+ $abook_checked = false;
+
+ $ret = array();
+
+ foreach($global_perms as $perm_name => $permission) {
+
+ // First find out what the channel owner declared permissions to be.
+
+ $channel_perm = $permission[0];
+
+ if(! $channel_checked) {
+ $r = q("select %s, channel_hash from channel where channel_id = %d limit 1",
+ dbesc($channel_perm),
+ intval($uid)
+ );
+
+ $channel_checked = true;
+ }
+
+ if(! $r) {
+ $ret[$perm_name] = 0;
+ continue;
+ }
+
+ // Check if this $uid is actually the $observer
+
+ if($r[0]['channel_hash'] === $observer) {
+ $ret[$perm_name] = 1;
+ continue;
+ }
+
+ // If it's an unauthenticated observer, we only need to see if PERMS_PUBLIC is set
+
+ if(! $observer) {
+ $ret[$perm_name] = (($r[0][$channel_perm] & PERMS_PUBLIC) ? 1 : 0);
+ continue;
+ }
+
+
+ // If we're still here, we have an observer, which means they're in the network.
+
+ if($r[0][$channel_perm] & PERMS_NETWORK) {
+ $ret[$perm_name] = 1;
+ continue;
+ }
+
+ // If PERMS_SITE is specified, find out if they've got an account on this hub
+
+ if($r[0][$channel_perm] & PERMS_SITE) {
+ if(! $onsite_checked) {
+ $c = q("select channel_hash from channel where channel_hash = '%s' limit 1",
+ dbesc($observer)
+ );
+
+ $onsite_checked = true;
+ }
+
+ if($c)
+ $ret[$perm_name] = 1;
+ else
+ $ret[$perm_name] = 0;
+
+ continue;
+ }
+
+ // If PERMS_CONTACTS or PERMS_SPECIFIC, they need to be in your address book
+ // and not blocked/ignored
+
+ if(! $abook_checked) {
+ $x = q("select abook_my_perms, abook_flags from abook
+ where abook_channel = %d and abook_xchan = '%s' limit 1",
+ intval($uid),
+ dbesc($observer)
+ );
+ $abook_checked = true;
+ }
+
+
+ // If they're blocked - they can't read or write
+
+ if((! $x) || ($x[0]['abook_flags'] & ABOOK_FLAG_BLOCKED)) {
+ $ret[$perm_name] = 0;
+ continue;
+ }
+
+ // If we're still going, they are a contact
+
+ if($r && $r[0][$channel_perm] & PERMS_CONTACTS) {
+
+ // Check if this is a write permission and they are being ignored
+
+ if((! $global_perms[$permission][2]) && ($x[0]['abook_flags'] & ABOOK_FLAG_IGNORED)) {
+ $ret[$perm_name] = 0;
+ continue;
+ }
+
+ // Otherwise they're a contact, so they have permission
+
+ $ret[$perm_name] = 1;
+ continue;
+ }
+
+ // Permission granted to certain channels. Let's see if the observer is one of them
+
+ if(($r) && ($r[0][$channel_perm] & PERMS_SPECIFIC)) {
+ if(($x) && ($x[0]['abook_my_perms'] & $global_perms[$permission][1])) {
+ $ret[$perm_name] = 1;
+ continue;
+ }
+ }
+
+ // No permissions allowed.
+
+ $ret[$perm_name] = 0;
+ continue;
+
+ }
+
+ return $ret;
+}
+
+
+function perm_is_allowed($uid,$observer,$perm_to_check) {
+
+ global $global_perms;
+
+ // First find out what the channel owner declared permissions to be.
+
+ $channel_perm = $global_perms[$permission][0];
+
+ $r = q("select %s, channel_hash from channel where channel_id = %d limit 1",
+ dbesc($channel_perm),
+ intval($uid)
+ );
+ if(! $r)
+ return false;
+
+ // Check if this $uid is actually the $observer
+
+ if($r[0]['channel_hash'] === $observer)
+ return true;
+
+ // If it's an unauthenticated observer, we only need to see if PERMS_PUBLIC is set
+
+ if(! $observer) {
+ return(($r[0][$channel_perm] & PERMS_PUBLIC) ? true : false);
+ }
+
+ // If we're still here, we have an observer, which means they're in the network.
+
+ if($r[0][$channel_perm] & PERMS_NETWORK)
+ return true;
+
+
+ // If PERMS_SITE is specified, find out if they've got an account on this hub
+
+ if($r[0][$channel_perm] & PERMS_SITE) {
+ $c = q("select channel_hash from channel where channel_hash = '%s' limit 1",
+ dbesc($observer)
+ );
+ if($c)
+ return true;
+ return false;
+ }
+
+ // If PERMS_CONTACTS or PERMS_SPECIFIC, they need to be in your address book
+ // and not blocked/ignored
+
+ $x = q("select abook_my_perms, abook_flags from abook where abook_channel = %d and abook_xchan = '%s' limit 1",
+ intval($uid),
+ dbesc($observer)
+ );
+
+ // If they're blocked - they can't read or write
+
+ if((! $x) || ($x[0]['abook_flags'] & ABOOK_FLAG_BLOCKED))
+ return false;
+
+ // If we're still going, they are a contact
+
+ if($r[0][$channel_perm] & PERMS_CONTACTS) {
+
+ // Check if this is a write permission and they are being ignored
+
+ if((! $global_perms[$permission][2]) && ($x[0]['abook_flags'] & ABOOK_FLAG_IGNORED))
+ return false;
+
+ // Otherwise they're a contact, so they have permission
+
+ return true;
+ }
+
+ // Permission granted to certain channels. Let's see if the observer is one of them
+
+ if($r[0][$channel_perm] & PERMS_SPECIFIC) {
+ if($x[0]['abook_my_perms'] & $global_perms[$permission][1])
+ return true;
+ }
+
+ // No permissions allowed.
+
+ return false;
+
+}
+
+
+
+
+function map_perms($channel,$zguid,$zsig) {
+
+ $is_contact = false;
+ $is_site = false;
+ $is_network = false;
+ $is_anybody = true;
+
+
+ // To avoid sending the lengthy target_sig with each request,
+ // We should provide an array of results for each target
+ // and let the sender match the signature.
+
+ if(strlen($zguid) && strlen($zsig)) {
+
+ $is_network = true;
+
+ $r = q("select * from contact where guid = '%s' and uid = %d limit 1",
+ dbesc($zguid),
+ intval($channel['channel_id'])
+ );
+ if($r && count($r)) {
+ $is_contact = true;
+ $contact = $r[0];
+ }
+ $r = q("select * from channel where channel_guid = '%s'",
+ dbesc($zguid)
+ );
+ if($r && count($r)) {
+ foreach($r as $rr) {
+ if(base64url_encode(rsa_sign($rr['channel_guid'],$rr['channel_prvkey'])) === $zsig) {
+ $is_site = true;
+ break;
+ }
+ }
+ }
+ }
+
+ $perms = array(
+ 'view_stream' => array('channel_r_stream', PERMS_R_STREAM ),
+ 'view_profile' => array('channel_r_profile', PERMS_R_PROFILE),
+ 'view_photos' => array('channel_r_photos', PERMS_R_PHOTOS),
+ 'view_contacts' => array('channel_r_abook', PERMS_R_ABOOK),
+
+ 'send_stream' => array('channel_w_stream', PERMS_W_STREAM),
+ 'post_wall' => array('channel_w_wall', PERMS_W_WALL),
+ 'tag_deliver' => array('channel_w_tagwall', PERMS_W_TAGWALL),
+ 'post_comments' => array('channel_w_comment', PERMS_W_COMMENT),
+ 'post_mail' => array('channel_w_mail', PERMS_W_MAIL),
+ 'post_photos' => array('channel_w_photos', PERMS_W_PHOTOS),
+ 'chat' => array('channel_w_chat', PERMS_W_CHAT),
+ );
+
+
+ $ret = array();
+
+ foreach($perms as $k => $v) {
+ $ret[$k] = z_check_perms($k,$v,$channel,$contact,$is_contact,$is_site,$is_network,$is_anybody);
+
+ }
+
+ return $ret;
+
+}
+
+function z_check_perms($k,$v,$channel,$contact,$is_contact,$is_site,$is_network,$is_anybody) {
+
+ $allow = (($contact['self']) ? true : false);
+
+ switch($channel[$v[0]]) {
+ case PERMS_PUBLIC:
+ if($is_anybody)
+ $allow = true;
+ break;
+ case PERMS_NETWORK:
+ if($is_network)
+ $allow = true;
+ break;
+ case PERMS_SITE:
+ if($is_site)
+ $allow = true;
+ break;
+ case PERMS_CONTACTS:
+ if($is_contact)
+ $allow = true;
+ break;
+ case PERMS_SPECIFIC:
+ if($is_contact && is_array($contact) && ($contact['my_perms'] & $v[1]))
+ $allow = true;
+ break;
+ default:
+ break;
+ }
+ return $allow;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 10:02:21 +0000