require_once 'XMPPHP/XMPP.php';
/**
- * checks whether a string is a syntactically valid Jabber ID (JID)
+ * Splits a Jabber ID (JID) into node, domain, and resource portions.
+ *
+ * Based on validation routine submitted by:
+ * @copyright 2009 Patrick Georgi <patrick@georgi-clan.de>
+ * @license Licensed under ISC-L, which is compatible with everything else that keeps the copyright notice intact.
*
* @param string $jid string to check
*
+ * @return array with "node", "domain", and "resource" indices
+ * @throws Exception if input is not valid
+ */
+
+function jabber_split_jid($jid)
+{
+ $chars = '';
+ /* the following definitions come from stringprep, Appendix C,
+ which is used in its entirety by nodeprop, Chapter 5, "Prohibited Output" */
+ /* C1.1 ASCII space characters */
+ $chars .= "\x{20}";
+ /* C1.2 Non-ASCII space characters */
+ $chars .= "\x{a0}\x{1680}\x{2000}-\x{200b}\x{202f}\x{205f}\x{3000a}";
+ /* C2.1 ASCII control characters */
+ $chars .= "\x{00}-\x{1f}\x{7f}";
+ /* C2.2 Non-ASCII control characters */
+ $chars .= "\x{80}-\x{9f}\x{6dd}\x{70f}\x{180e}\x{200c}\x{200d}\x{2028}\x{2029}\x{2060}-\x{2063}\x{206a}-\x{206f}\x{feff}\x{fff9}-\x{fffc}\x{1d173}-\x{1d17a}";
+ /* C3 - Private Use */
+ $chars .= "\x{e000}-\x{f8ff}\x{f0000}-\x{ffffd}\x{100000}-\x{10fffd}";
+ /* C4 - Non-character code points */
+ $chars .= "\x{fdd0}-\x{fdef}\x{fffe}\x{ffff}\x{1fffe}\x{1ffff}\x{2fffe}\x{2ffff}\x{3fffe}\x{3ffff}\x{4fffe}\x{4ffff}\x{5fffe}\x{5ffff}\x{6fffe}\x{6ffff}\x{7fffe}\x{7ffff}\x{8fffe}\x{8ffff}\x{9fffe}\x{9ffff}\x{afffe}\x{affff}\x{bfffe}\x{bffff}\x{cfffe}\x{cffff}\x{dfffe}\x{dffff}\x{efffe}\x{effff}\x{ffffe}\x{fffff}\x{10fffe}\x{10ffff}";
+ /* C5 - Surrogate codes */
+ $chars .= "\x{d800}-\x{dfff}";
+ /* C6 - Inappropriate for plain text */
+ $chars .= "\x{fff9}-\x{fffd}";
+ /* C7 - Inappropriate for canonical representation */
+ $chars .= "\x{2ff0}-\x{2ffb}";
+ /* C8 - Change display properties or are deprecated */
+ $chars .= "\x{340}\x{341}\x{200e}\x{200f}\x{202a}-\x{202e}\x{206a}-\x{206f}";
+ /* C9 - Tagging characters */
+ $chars .= "\x{e0001}\x{e0020}-\x{e007f}";
+
+ /* Nodeprep forbids some more characters */
+ $nodeprepchars = $chars;
+ $nodeprepchars .= "\x{22}\x{26}\x{27}\x{2f}\x{3a}\x{3c}\x{3e}\x{40}";
+
+ $parts = explode("/", $jid, 2);
+ if (count($parts) > 1) {
+ $resource = $parts[1];
+ if ($resource == '') {
+ // Warning: empty resource isn't legit.
+ // But if we're normalizing, we may as well take it...
+ }
+ } else {
+ $resource = null;
+ }
+
+ $node = explode("@", $parts[0]);
+ if ((count($node) > 2) || (count($node) == 0)) {
+ throw new Exception("Invalid JID: too many @s");
+ } else if (count($node) == 1) {
+ $domain = $node[0];
+ $node = null;
+ } else {
+ $domain = $node[1];
+ $node = $node[0];
+ if ($node == '') {
+ throw new Exception("Invalid JID: @ but no node");
+ }
+ }
+
+ // Length limits per http://xmpp.org/rfcs/rfc3920.html#addressing
+ if ($node !== null) {
+ if (strlen($node) > 1023) {
+ throw new Exception("Invalid JID: node too long.");
+ }
+ if (preg_match("/[".$nodeprepchars."]/u", $node)) {
+ throw new Exception("Invalid JID node '$node'");
+ }
+ }
+
+ if (strlen($domain) > 1023) {
+ throw new Exception("Invalid JID: domain too long.");
+ }
+ if (!common_valid_domain($domain)) {
+ throw new Exception("Invalid JID domain name '$domain'");
+ }
+
+ if ($resource !== null) {
+ if (strlen($resource) > 1023) {
+ throw new Exception("Invalid JID: resource too long.");
+ }
+ if (preg_match("/[".$chars."]/u", $resource)) {
+ throw new Exception("Invalid JID resource '$resource'");
+ }
+ }
+
+ return array('node' => is_null($node) ? null : mb_strtolower($node),
+ 'domain' => is_null($domain) ? null : mb_strtolower($domain),
+ 'resource' => $resource);
+}
+
+/**
+ * Checks whether a string is a syntactically valid Jabber ID (JID),
+ * either with or without a resource.
+ *
+ * Note that a bare domain can be a valid JID.
+ *
+ * @param string $jid string to check
+ * @param bool $check_domain whether we should validate that domain...
+ *
* @return boolean whether the string is a valid JID
*/
+function jabber_valid_full_jid($jid, $check_domain=false)
+{
+ try {
+ $parts = jabber_split_jid($jid);
+ if ($check_domain) {
+ if (!jabber_check_domain($parts['domain'])) {
+ return false;
+ }
+ }
+ return $parts['resource'] !== ''; // missing or present; empty ain't kosher
+ } catch (Exception $e) {
+ return false;
+ }
+}
-function jabber_valid_base_jid($jid)
+/**
+ * Checks whether a string is a syntactically valid base Jabber ID (JID).
+ * A base JID won't include a resource specifier on the end; since we
+ * take it off when reading input we can't really use them reliably
+ * to direct outgoing messages yet (sorry guys!)
+ *
+ * Note that a bare domain can be a valid JID.
+ *
+ * @param string $jid string to check
+ * @param bool $check_domain whether we should validate that domain...
+ *
+ * @return boolean whether the string is a valid JID
+ */
+function jabber_valid_base_jid($jid, $check_domain=false)
{
- // Cheap but effective
- return Validate::email($jid);
+ try {
+ $parts = jabber_split_jid($jid);
+ if ($check_domain) {
+ if (!jabber_check_domain($parts['domain'])) {
+ return false;
+ }
+ }
+ return ($parts['resource'] === null); // missing; empty ain't kosher
+ } catch (Exception $e) {
+ return false;
+ }
}
/**
- * normalizes a Jabber ID for comparison
+ * Normalizes a Jabber ID for comparison, dropping the resource component if any.
*
* @param string $jid JID to check
+ * @param bool $check_domain if true, reject if the domain isn't findable
*
* @return string an equivalent JID in normalized (lowercase) form
*/
function jabber_normalize_jid($jid)
{
- if (preg_match("/(?:([^\@]+)\@)?([^\/]+)(?:\/(.*))?$/", $jid, $matches)) {
- $node = $matches[1];
- $server = $matches[2];
- return strtolower($node.'@'.$server);
- } else {
+ try {
+ $parts = jabber_split_jid($jid);
+ if ($parts['node'] !== null) {
+ return $parts['node'] . '@' . $parts['domain'];
+ } else {
+ return $parts['domain'];
+ }
+ } catch (Exception $e) {
return null;
}
}
+/**
+ * Check if this domain's got some legit DNS record
+ */
+function jabber_check_domain($domain)
+{
+ if (checkdnsrr("_xmpp-server._tcp." . $domain, "SRV")) {
+ return true;
+ }
+ if (checkdnsrr($domain, "ANY")) {
+ return true;
+ }
+ return false;
+}
+
/**
* the JID of the Jabber daemon for this StatusNet instance
*
projects / quix0rs-gnu-social.git / blobdiff