Basic splitting/validation code submitted via http://status.net/wiki/XMPP/JID_validation -- Copyright 2009 Patrick Georgi <patrick@georgi-clan.de> Licensed under ISC-L, which is compatible with everything else that keeps the copyright notice intact. Added PEAR Net_IDNA package to extlib to handle IDN normalization (also used by Validate's email verifier if present). * added test suite, supplemented my own test cases with JID validation and normalization test cases from libpurple * follows XMPP rules for validation of name part * fixes for normalization with non-ASCII names * will do domain checks if $config['email']['check_domain'] is on, checking for an XMPP-server SRV record or any lookup. (We don't actually need to ping those direct though.) * some more obscure stringprep validation rules aren't quite followed yet, but we err on the side of permissiveness. * we still don't actually let you save your address with a resource on it, as we strip resources when looking up users who've sent us presence or message updates. I would recommend saving the outgoing resource as a separate field if/when we add that..?
		
			
				
	
	
		
			641 lines
		
	
	
		
			20 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
			
		
		
	
	
			641 lines
		
	
	
		
			20 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
<?php
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/**
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 * StatusNet, the distributed open-source microblogging tool
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 *
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 * utility functions for Jabber/GTalk/XMPP messages
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 *
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 * PHP version 5
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 *
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 * LICENCE: This program is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU Affero General Public License as published by
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 * the Free Software Foundation, either version 3 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU Affero General Public License for more details.
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 *
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 * You should have received a copy of the GNU Affero General Public License
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 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 *
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 * @category  Network
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 * @package   StatusNet
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 * @author    Evan Prodromou <evan@status.net>
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 * @copyright 2008 StatusNet, Inc.
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 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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 * @link      http://status.net/
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 */
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if (!defined('STATUSNET') && !defined('LACONICA')) {
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    exit(1);
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}
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require_once 'XMPPHP/XMPP.php';
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/**
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 * Splits a Jabber ID (JID) into node, domain, and resource portions.
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 * 
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 * Based on validation routine submitted by:
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 * @copyright 2009 Patrick Georgi <patrick@georgi-clan.de>
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 * @license Licensed under ISC-L, which is compatible with everything else that keeps the copyright notice intact. 
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 *
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 * @param string $jid string to check
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 *
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 * @return array with "node", "domain", and "resource" indices
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 * @throws Exception if input is not valid
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 */
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function jabber_split_jid($jid)
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{
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    $chars = '';
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    /* the following definitions come from stringprep, Appendix C,
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       which is used in its entirety by nodeprop, Chapter 5, "Prohibited Output" */
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    /* C1.1 ASCII space characters */
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    $chars .= "\x{20}";
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    /* C1.2 Non-ASCII space characters */
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    $chars .= "\x{a0}\x{1680}\x{2000}-\x{200b}\x{202f}\x{205f}\x{3000a}";
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    /* C2.1 ASCII control characters */
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    $chars .= "\x{00}-\x{1f}\x{7f}";
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    /* C2.2 Non-ASCII control characters */
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    $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}";
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    /* C3 - Private Use */
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    $chars .= "\x{e000}-\x{f8ff}\x{f0000}-\x{ffffd}\x{100000}-\x{10fffd}";
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    /* C4 - Non-character code points */
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    $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}";
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    /* C5 - Surrogate codes */
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    $chars .= "\x{d800}-\x{dfff}";
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    /* C6 - Inappropriate for plain text */
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    $chars .= "\x{fff9}-\x{fffd}";
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    /* C7 - Inappropriate for canonical representation */
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    $chars .= "\x{2ff0}-\x{2ffb}";
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    /* C8 - Change display properties or are deprecated */
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    $chars .= "\x{340}\x{341}\x{200e}\x{200f}\x{202a}-\x{202e}\x{206a}-\x{206f}";
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    /* C9 - Tagging characters */
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    $chars .= "\x{e0001}\x{e0020}-\x{e007f}";
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    /* Nodeprep forbids some more characters */
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    $nodeprepchars = $chars;
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    $nodeprepchars .= "\x{22}\x{26}\x{27}\x{2f}\x{3a}\x{3c}\x{3e}\x{40}";
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    $parts = explode("/", $jid, 2);
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    if (count($parts) > 1) {
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        $resource = $parts[1];
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        if ($resource == '') {
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            // Warning: empty resource isn't legit.
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            // But if we're normalizing, we may as well take it...
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        }
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    } else {
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        $resource = null;
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    }
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    $node = explode("@", $parts[0]);
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    if ((count($node) > 2) || (count($node) == 0)) {
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        throw new Exception("Invalid JID: too many @s");
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    } else if (count($node) == 1) {
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        $domain = $node[0];
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        $node = null;
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    } else {
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        $domain = $node[1];
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        $node = $node[0];
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        if ($node == '') {
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            throw new Exception("Invalid JID: @ but no node");
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        }
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    }
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    // Length limits per http://xmpp.org/rfcs/rfc3920.html#addressing
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    if ($node !== null) {
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        if (strlen($node) > 1023) {
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            throw new Exception("Invalid JID: node too long.");
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        }
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        if (preg_match("/[".$nodeprepchars."]/u", $node)) {
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            throw new Exception("Invalid JID node '$node'");
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        }
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    }
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    if (strlen($domain) > 1023) {
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        throw new Exception("Invalid JID: domain too long.");
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    }
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    if (!common_valid_domain($domain)) {
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        throw new Exception("Invalid JID domain name '$domain'");
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    }
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    if ($resource !== null) {
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        if (strlen($resource) > 1023) {
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            throw new Exception("Invalid JID: resource too long.");
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        }
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        if (preg_match("/[".$chars."]/u", $resource)) {
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            throw new Exception("Invalid JID resource '$resource'");
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        }
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    }
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    return array('node' => is_null($node) ? null : mb_strtolower($node),
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                 'domain' => is_null($domain) ? null : mb_strtolower($domain),
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                 'resource' => $resource);
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}
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/**
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 * Checks whether a string is a syntactically valid Jabber ID (JID),
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 * either with or without a resource.
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 * 
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 * Note that a bare domain can be a valid JID.
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 * 
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 * @param string $jid string to check
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 * @param bool $check_domain whether we should validate that domain...
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 *
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 * @return     boolean whether the string is a valid JID
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 */
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function jabber_valid_full_jid($jid, $check_domain=false)
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{
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    try {
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        $parts = jabber_split_jid($jid);
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        if ($check_domain) {
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            if (!jabber_check_domain($parts['domain'])) {
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                return false;
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            }
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        }
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        return $parts['resource'] !== ''; // missing or present; empty ain't kosher
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    } catch (Exception $e) {
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        return false;
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    }
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}
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/**
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 * Checks whether a string is a syntactically valid base Jabber ID (JID).
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 * A base JID won't include a resource specifier on the end; since we
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 * take it off when reading input we can't really use them reliably
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 * to direct outgoing messages yet (sorry guys!)
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 * 
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 * Note that a bare domain can be a valid JID.
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 * 
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 * @param string $jid string to check
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 * @param bool $check_domain whether we should validate that domain...
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 *
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 * @return     boolean whether the string is a valid JID
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 */
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function jabber_valid_base_jid($jid, $check_domain=false)
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{
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    try {
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        $parts = jabber_split_jid($jid);
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        if ($check_domain) {
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            if (!jabber_check_domain($parts['domain'])) {
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                return false;
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            }
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        }
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        return ($parts['resource'] === null); // missing; empty ain't kosher
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    } catch (Exception $e) {
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        return false;
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    }
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}
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/**
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 * Normalizes a Jabber ID for comparison, dropping the resource component if any.
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 *
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 * @param string $jid JID to check
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 * @param bool $check_domain if true, reject if the domain isn't findable
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 *
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 * @return string an equivalent JID in normalized (lowercase) form
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 */
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function jabber_normalize_jid($jid)
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{
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    try {
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        $parts = jabber_split_jid($jid);
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        if ($parts['node'] !== null) {
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            return $parts['node'] . '@' . $parts['domain'];
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        } else {
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            return $parts['domain'];
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        }
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    } catch (Exception $e) {
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        return null;
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    }
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}
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/**
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 * Check if this domain's got some legit DNS record
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 */
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function jabber_check_domain($domain)
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{
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    if (checkdnsrr("_xmpp-server._tcp." . $domain, "SRV")) {
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        return true;
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    }
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    if (checkdnsrr($domain, "ANY")) {
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        return true;
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    }
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    return false;
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}
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/**
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 * the JID of the Jabber daemon for this StatusNet instance
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 *
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 * @return string JID of the Jabber daemon
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 */
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function jabber_daemon_address()
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{
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    return common_config('xmpp', 'user') . '@' . common_config('xmpp', 'server');
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}
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class Sharing_XMPP extends XMPPHP_XMPP
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{
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    function getSocket()
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    {
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        return $this->socket;
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    }
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}
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/**
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 * Build an XMPP proxy connection that'll save outgoing messages
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 * to the 'xmppout' queue to be picked up by xmppdaemon later.
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 *
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 * If queueing is disabled, we'll grab a live connection.
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 *
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 * @return XMPPHP
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 */
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function jabber_proxy()
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{
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    if (common_config('queue', 'enabled')) {
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	    $proxy = new Queued_XMPP(common_config('xmpp', 'host') ?
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                                 common_config('xmpp', 'host') :
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                                 common_config('xmpp', 'server'),
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                                 common_config('xmpp', 'port'),
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                                 common_config('xmpp', 'user'),
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                                 common_config('xmpp', 'password'),
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                                 common_config('xmpp', 'resource') . 'daemon',
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                                 common_config('xmpp', 'server'),
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                                 common_config('xmpp', 'debug') ?
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                                 true : false,
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                                 common_config('xmpp', 'debug') ?
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                                 XMPPHP_Log::LEVEL_VERBOSE :  null);
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        return $proxy;
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    } else {
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        return jabber_connect();
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    }
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}
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/**
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 * Lazy-connect the configured Jabber account to the configured server;
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 * if already opened, the same connection will be returned.
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 *
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 * In a multi-site background process, each site configuration
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 * will get its own connection.
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 *
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 * @param string $resource Resource to connect (defaults to configured resource)
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 *
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 * @return XMPPHP connection to the configured server
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 */
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function jabber_connect($resource=null)
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{
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    static $connections = array();
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    $site = common_config('site', 'server');
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    if (empty($connections[$site])) {
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        if (empty($resource)) {
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            $resource = common_config('xmpp', 'resource');
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        }
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        $conn = new Sharing_XMPP(common_config('xmpp', 'host') ?
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                                common_config('xmpp', 'host') :
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                                common_config('xmpp', 'server'),
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                                common_config('xmpp', 'port'),
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                                common_config('xmpp', 'user'),
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                                common_config('xmpp', 'password'),
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                                $resource,
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                                common_config('xmpp', 'server'),
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                                common_config('xmpp', 'debug') ?
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                                true : false,
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                                common_config('xmpp', 'debug') ?
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                                XMPPHP_Log::LEVEL_VERBOSE :  null
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                                );
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        if (!$conn) {
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            return false;
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        }
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        $connections[$site] = $conn;
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        $conn->autoSubscribe();
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        $conn->useEncryption(common_config('xmpp', 'encryption'));
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        try {
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            common_log(LOG_INFO, __METHOD__ . ": connecting " .
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                common_config('xmpp', 'user') . '/' . $resource);
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            //$conn->connect(true); // true = persistent connection
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            $conn->connect(); // persistent connections break multisite
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        } catch (XMPPHP_Exception $e) {
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            common_log(LOG_ERR, $e->getMessage());
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            return false;
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        }
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        $conn->processUntil('session_start');
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    }
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    return $connections[$site];
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}
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/**
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 * Queue send for a single notice to a given Jabber address
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 *
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 * @param string $to     JID to send the notice to
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 * @param Notice $notice notice to send
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 *
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 * @return boolean success value
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 */
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function jabber_send_notice($to, $notice)
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{
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    $conn = jabber_proxy();
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    $profile = Profile::staticGet($notice->profile_id);
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    if (!$profile) {
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        common_log(LOG_WARNING, 'Refusing to send notice with ' .
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                   'unknown profile ' . common_log_objstring($notice),
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                   __FILE__);
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        return false;
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    }
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    $msg   = jabber_format_notice($profile, $notice);
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    $entry = jabber_format_entry($profile, $notice);
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    $conn->message($to, $msg, 'chat', null, $entry);
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    $profile->free();
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    return true;
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}
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/**
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 * extra information for XMPP messages, as defined by Twitter
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 *
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 * @param Profile $profile Profile of the sending user
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 * @param Notice  $notice  Notice being sent
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 *
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 * @return string Extra information (Atom, HTML, addresses) in string format
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 */
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function jabber_format_entry($profile, $notice)
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{
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    $entry = $notice->asAtomEntry(true, true);
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    $xs = new XMLStringer();
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    $xs->elementStart('html', array('xmlns' => 'http://jabber.org/protocol/xhtml-im'));
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    $xs->elementStart('body', array('xmlns' => 'http://www.w3.org/1999/xhtml'));
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    $xs->element('a', array('href' => $profile->profileurl),
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                 $profile->nickname);
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    $xs->text(": ");
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    if (!empty($notice->rendered)) {
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        $xs->raw($notice->rendered);
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    } else {
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        $xs->raw(common_render_content($notice->content, $notice));
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    }
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    $xs->text(" ");
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    $xs->element('a', array(
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        'href'=>common_local_url('conversation',
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            array('id' => $notice->conversation)).'#notice-'.$notice->id
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         ),sprintf(_('[%s]'),$notice->id));
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    $xs->elementEnd('body');
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    $xs->elementEnd('html');
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    $html = $xs->getString();
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    return $html . ' ' . $entry;
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}
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/**
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 * sends a single text message to a given JID
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 *
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 * @param string $to      JID to send the message to
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 * @param string $body    body of the message
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 * @param string $type    type of the message
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 * @param string $subject subject of the message
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 *
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 * @return boolean success flag
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 */
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function jabber_send_message($to, $body, $type='chat', $subject=null)
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{
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    $conn = jabber_proxy();
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    $conn->message($to, $body, $type, $subject);
 | 
						|
    return true;
 | 
						|
}
 | 
						|
 | 
						|
/**
 | 
						|
 * sends a presence stanza on the Jabber network
 | 
						|
 *
 | 
						|
 * @param string $status   current status, free-form string
 | 
						|
 * @param string $show     structured status value
 | 
						|
 * @param string $to       recipient of presence, null for general
 | 
						|
 * @param string $type     type of status message, related to $show
 | 
						|
 * @param int    $priority priority of the presence
 | 
						|
 *
 | 
						|
 * @return boolean success value
 | 
						|
 */
 | 
						|
 | 
						|
function jabber_send_presence($status, $show='available', $to=null,
 | 
						|
                              $type = 'available', $priority=null)
 | 
						|
{
 | 
						|
    $conn = jabber_connect();
 | 
						|
    if (!$conn) {
 | 
						|
        return false;
 | 
						|
    }
 | 
						|
    $conn->presence($status, $show, $to, $type, $priority);
 | 
						|
    return true;
 | 
						|
}
 | 
						|
 | 
						|
/**
 | 
						|
 * sends a confirmation request to a JID
 | 
						|
 *
 | 
						|
 * @param string $code     confirmation code for confirmation URL
 | 
						|
 * @param string $nickname nickname of confirming user
 | 
						|
 * @param string $address  JID to send confirmation to
 | 
						|
 *
 | 
						|
 * @return boolean success flag
 | 
						|
 */
 | 
						|
 | 
						|
function jabber_confirm_address($code, $nickname, $address)
 | 
						|
{
 | 
						|
    $body = 'User "' . $nickname . '" on ' . common_config('site', 'name') . ' ' .
 | 
						|
      'has said that your Jabber ID belongs to them. ' .
 | 
						|
      'If that\'s true, you can confirm by clicking on this URL: ' .
 | 
						|
      common_local_url('confirmaddress', array('code' => $code)) .
 | 
						|
      ' . (If you cannot click it, copy-and-paste it into the ' .
 | 
						|
      'address bar of your browser). If that user isn\'t you, ' .
 | 
						|
      'or if you didn\'t request this confirmation, just ignore this message.';
 | 
						|
 | 
						|
    return jabber_send_message($address, $body);
 | 
						|
}
 | 
						|
 | 
						|
/**
 | 
						|
 * sends a "special" presence stanza on the Jabber network
 | 
						|
 *
 | 
						|
 * @param string $type   Type of presence
 | 
						|
 * @param string $to     JID to send presence to
 | 
						|
 * @param string $show   show value for presence
 | 
						|
 * @param string $status status value for presence
 | 
						|
 *
 | 
						|
 * @return boolean success flag
 | 
						|
 *
 | 
						|
 * @see jabber_send_presence()
 | 
						|
 */
 | 
						|
 | 
						|
function jabber_special_presence($type, $to=null, $show=null, $status=null)
 | 
						|
{
 | 
						|
    // FIXME: why use this instead of jabber_send_presence()?
 | 
						|
    $conn = jabber_connect();
 | 
						|
 | 
						|
    $to     = htmlspecialchars($to);
 | 
						|
    $status = htmlspecialchars($status);
 | 
						|
 | 
						|
    $out = "<presence";
 | 
						|
    if ($to) {
 | 
						|
        $out .= " to='$to'";
 | 
						|
    }
 | 
						|
    if ($type) {
 | 
						|
        $out .= " type='$type'";
 | 
						|
    }
 | 
						|
    if ($show == 'available' and !$status) {
 | 
						|
        $out .= "/>";
 | 
						|
    } else {
 | 
						|
        $out .= ">";
 | 
						|
        if ($show && ($show != 'available')) {
 | 
						|
            $out .= "<show>$show</show>";
 | 
						|
        }
 | 
						|
        if ($status) {
 | 
						|
            $out .= "<status>$status</status>";
 | 
						|
        }
 | 
						|
        $out .= "</presence>";
 | 
						|
    }
 | 
						|
    $conn->send($out);
 | 
						|
}
 | 
						|
 | 
						|
/**
 | 
						|
 * Queue broadcast of a notice to all subscribers and reply recipients
 | 
						|
 *
 | 
						|
 * This function will send a notice to all subscribers on the local server
 | 
						|
 * who have Jabber addresses, and have Jabber notification enabled, and
 | 
						|
 * have this subscription enabled for Jabber. It also sends the notice to
 | 
						|
 * all recipients of @-replies who have Jabber addresses and Jabber notification
 | 
						|
 * enabled. This is really the heart of Jabber distribution in StatusNet.
 | 
						|
 *
 | 
						|
 * @param Notice $notice The notice to broadcast
 | 
						|
 *
 | 
						|
 * @return boolean success flag
 | 
						|
 */
 | 
						|
 | 
						|
function jabber_broadcast_notice($notice)
 | 
						|
{
 | 
						|
    if (!common_config('xmpp', 'enabled')) {
 | 
						|
        return true;
 | 
						|
    }
 | 
						|
    $profile = Profile::staticGet($notice->profile_id);
 | 
						|
 | 
						|
    if (!$profile) {
 | 
						|
        common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
 | 
						|
                   'unknown profile ' . common_log_objstring($notice),
 | 
						|
                   __FILE__);
 | 
						|
        return true; // not recoverable; discard.
 | 
						|
    }
 | 
						|
 | 
						|
    $msg   = jabber_format_notice($profile, $notice);
 | 
						|
    $entry = jabber_format_entry($profile, $notice);
 | 
						|
 | 
						|
    $profile->free();
 | 
						|
    unset($profile);
 | 
						|
 | 
						|
    $sent_to = array();
 | 
						|
 | 
						|
    $conn = jabber_proxy();
 | 
						|
 | 
						|
    $ni = $notice->whoGets();
 | 
						|
 | 
						|
    foreach ($ni as $user_id => $reason) {
 | 
						|
        $user = User::staticGet($user_id);
 | 
						|
        if (empty($user) ||
 | 
						|
            empty($user->jabber) ||
 | 
						|
            !$user->jabbernotify) {
 | 
						|
            // either not a local user, or just not found
 | 
						|
            continue;
 | 
						|
        }
 | 
						|
        switch ($reason) {
 | 
						|
        case NOTICE_INBOX_SOURCE_REPLY:
 | 
						|
            if (!$user->jabberreplies) {
 | 
						|
                continue 2;
 | 
						|
            }
 | 
						|
            break;
 | 
						|
        case NOTICE_INBOX_SOURCE_SUB:
 | 
						|
            $sub = Subscription::pkeyGet(array('subscriber' => $user->id,
 | 
						|
                                               'subscribed' => $notice->profile_id));
 | 
						|
            if (empty($sub) || !$sub->jabber) {
 | 
						|
                continue 2;
 | 
						|
            }
 | 
						|
            break;
 | 
						|
        case NOTICE_INBOX_SOURCE_GROUP:
 | 
						|
            break;
 | 
						|
        default:
 | 
						|
            throw new Exception(sprintf(_("Unknown inbox source %d."), $reason));
 | 
						|
        }
 | 
						|
 | 
						|
        common_log(LOG_INFO,
 | 
						|
                   'Sending notice ' . $notice->id . ' to ' . $user->jabber,
 | 
						|
                   __FILE__);
 | 
						|
        $conn->message($user->jabber, $msg, 'chat', null, $entry);
 | 
						|
    }
 | 
						|
 | 
						|
    return true;
 | 
						|
}
 | 
						|
 | 
						|
/**
 | 
						|
 * Queue send of a notice to all public listeners
 | 
						|
 *
 | 
						|
 * For notices that are generated on the local system (by users), we can optionally
 | 
						|
 * forward them to remote listeners by XMPP.
 | 
						|
 *
 | 
						|
 * @param Notice $notice notice to broadcast
 | 
						|
 *
 | 
						|
 * @return boolean success flag
 | 
						|
 */
 | 
						|
 | 
						|
function jabber_public_notice($notice)
 | 
						|
{
 | 
						|
    // Now, users who want everything
 | 
						|
 | 
						|
    $public = common_config('xmpp', 'public');
 | 
						|
 | 
						|
    // FIXME PRIV don't send out private messages here
 | 
						|
    // XXX: should we send out non-local messages if public,localonly
 | 
						|
    // = false? I think not
 | 
						|
 | 
						|
    if ($public && $notice->is_local == Notice::LOCAL_PUBLIC) {
 | 
						|
        $profile = Profile::staticGet($notice->profile_id);
 | 
						|
 | 
						|
        if (!$profile) {
 | 
						|
            common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
 | 
						|
                       'unknown profile ' . common_log_objstring($notice),
 | 
						|
                       __FILE__);
 | 
						|
            return true; // not recoverable; discard.
 | 
						|
        }
 | 
						|
 | 
						|
        $msg   = jabber_format_notice($profile, $notice);
 | 
						|
        $entry = jabber_format_entry($profile, $notice);
 | 
						|
 | 
						|
        $conn = jabber_proxy();
 | 
						|
 | 
						|
        foreach ($public as $address) {
 | 
						|
            common_log(LOG_INFO,
 | 
						|
                       'Sending notice ' . $notice->id .
 | 
						|
                       ' to public listener ' . $address,
 | 
						|
                       __FILE__);
 | 
						|
            $conn->message($address, $msg, 'chat', null, $entry);
 | 
						|
        }
 | 
						|
        $profile->free();
 | 
						|
    }
 | 
						|
 | 
						|
    return true;
 | 
						|
}
 | 
						|
 | 
						|
/**
 | 
						|
 * makes a plain-text formatted version of a notice, suitable for Jabber distribution
 | 
						|
 *
 | 
						|
 * @param Profile &$profile profile of the sending user
 | 
						|
 * @param Notice  &$notice  notice being sent
 | 
						|
 *
 | 
						|
 * @return string plain-text version of the notice, with user nickname prefixed
 | 
						|
 */
 | 
						|
 | 
						|
function jabber_format_notice(&$profile, &$notice)
 | 
						|
{
 | 
						|
    return $profile->nickname . ': ' . $notice->content . ' [' . $notice->id . ']';
 | 
						|
}
 |