643 lines
		
	
	
		
			No EOL
		
	
	
		
			18 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
			
		
		
	
	
			643 lines
		
	
	
		
			No EOL
		
	
	
		
			18 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
<?php
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/**
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 *
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 * Module: dfrn_request
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 *
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 * Purpose: Handles communication associated with the issuance of
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 * friend requests.
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 *
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 */
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if(! function_exists('dfrn_request_init')) {
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function dfrn_request_init(&$a) {
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	if($a->argc > 1)
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		$which = $a->argv[1];
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	profile_load($a,$which);
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	return;
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}}
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/**
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 * Function: dfrn_request_post
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 *
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 * Purpose:
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 * Handles multiple scenarios.
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 *
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 * Scenario 1:
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 * Clicking 'submit' on a friend request page.
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 *
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 * Scenario 2:
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 * Following Scenario 1, we are brought back to our home site
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 * in order to link our friend request with our own server cell.
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 * After logging in, we click 'submit' to approve the linkage.
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 *
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 */
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if(! function_exists('dfrn_request_post')) {
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function dfrn_request_post(&$a) {
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	if(($a->argc != 2) || (! count($a->profile)))
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		return;
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	if($_POST['cancel']) {
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		goaway($a->get_baseurl());
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	} 
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	/**
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	 *
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	 * Scenario 2: We've introduced ourself to another cell, then have been returned to our own cell
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	 * to confirm the request, and then we've clicked submit (perhaps after logging in). 
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	 * That brings us here:
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	 *
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	 */
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	if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)) {
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		/**
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		 * Ensure this is a valid request
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		 */
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		if(local_user() && ($a->user['nickname'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) {
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			$dfrn_url    = notags(trim($_POST['dfrn_url']));
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			$aes_allow   = (((x($_POST,'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
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			$confirm_key = ((x($_POST,'confirm_key')) ? $_POST['confirm_key'] : "");
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			$contact_record = null;
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			if(x($dfrn_url)) {
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				/**
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				 * Lookup the contact based on their URL (which is the only unique thing we have at the moment)
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				 */
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				$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1",
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					intval(local_user()),
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					dbesc($dfrn_url)
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				);
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				if(count($r)) {
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					if(strlen($r[0]['dfrn-id'])) {
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						/**
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						 * We don't need to be here. It has already happened.
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						 */
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						notice( t("This introduction has already been accepted.") . EOL );
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						return;
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					}
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					else
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						$contact_record = $r[0];
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				}
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				if(is_array($contact_record)) {
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					$r = q("UPDATE `contact` SET `ret-aes` = %d WHERE `id` = %d LIMIT 1",
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						intval($aes_allow),
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						intval($contact_record['id'])
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					);
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				}
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				else {
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					/**
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					 * Scrape the other site's profile page to pick up the dfrn links, key, fn, and photo
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					 */
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					require_once('Scrape.php');
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					$parms = scrape_dfrn($dfrn_url);
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					if(! count($parms)) {
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						notice( t('Profile location is not valid or does not contain profile information.') . EOL );
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						return;
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					}
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					else {
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						if(! x($parms,'fn'))
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							notice( t('Warning: profile location has no identifiable owner name.') . EOL );
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						if(! x($parms,'photo'))
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							notice( t('Warning: profile location has no profile photo.') . EOL );
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						$invalid = validate_dfrn($parms);		
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						if($invalid) {
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							notice( sprintf( tt("%d required parameter was not found at the given location",
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												"%d required parameters were not found at the given location",
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												$invalid), $invalid) . EOL );
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							return;
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						}
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					}
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					$dfrn_request = $parms['dfrn-request'];
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                    /********* Escape the entire array ********/
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					dbesc_array($parms);
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					/******************************************/
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					/**
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					 * Create a contact record on our site for the other person
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					 */
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					$r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `name`, `nick`, `photo`, `site-pubkey`,
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						`request`, `confirm`, `notify`, `poll`, `aes_allow`) 
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						VALUES ( %d, '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d)",
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						intval(local_user()),
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						datetime_convert(),
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						dbesc($dfrn_url),
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						$parms['fn'],
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						$parms['nick'],
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						$parms['photo'],
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						$parms['key'],
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						$parms['dfrn-request'],
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						$parms['dfrn-confirm'],
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						$parms['dfrn-notify'],
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						$parms['dfrn-poll'],
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						intval($aes_allow)
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					);
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				}
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				if($r) {
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					notice( t("Introduction complete.") . EOL);
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				}
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				/**
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				 * Allow the blocked remote notification to complete
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				 */
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				if(is_array($contact_record))
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					$dfrn_request = $contact_record['request'];
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				if(strlen($dfrn_request) && strlen($confirm_key))
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					$s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
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				// (ignore reply, nothing we can do it failed)
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				goaway($dfrn_url);
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				return; // NOTREACHED
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			}
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		}
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 		// invalid/bogus request
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		notice( t('Unrecoverable protocol error.') . EOL );
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		goaway($a->get_baseurl());
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		return; // NOTREACHED
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	}
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	/**
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	 * Otherwise:
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	 * 
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	 * Scenario 1:
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	 * We are the requestee. A person from a remote cell has made an introduction 
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	 * on our profile web page and clicked submit. We will use their DFRN-URL to 
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	 * figure out how to contact their cell.  
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	 *
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	 * Scrape the originating DFRN-URL for everything we need. Create a contact record
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	 * and an introduction to show our user next time he/she logs in.
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	 * Finally redirect back to the requestor so that their site can record the request.
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	 * If our user (the requestee) later confirms this request, a record of it will need 
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	 * to exist on the requestor's cell in order for the confirmation process to complete.. 
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	 *
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	 * It's possible that neither the requestor or the requestee are logged in at the moment,
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	 * and the requestor does not yet have any credentials to the requestee profile.
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	 *
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	 * Who is the requestee? We've already loaded their profile which means their nickname should be
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	 * in $a->argv[1] and we should have their complete info in $a->profile.
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	 *
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	 */
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	if(! (is_array($a->profile) && count($a->profile))) {
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		notice( t('Profile unavailable.') . EOL);
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		return;
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	}
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	$nickname       = $a->profile['nickname'];
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	$notify_flags   = $a->profile['notify-flags'];
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	$uid            = $a->profile['uid'];
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	$maxreq         = intval($a->profile['maxreq']);
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	$contact_record = null;
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	$failed         = false;
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	$parms          = null;
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	if( x($_POST,'dfrn_url')) {
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		/**
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		 * Block friend request spam
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		 */
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		if($maxreq) {
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			$r = q("SELECT * FROM `intro` WHERE `datetime` > '%s' AND `uid` = %d",
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				dbesc(datetime_convert('UTC','UTC','now - 24 hours')),
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				intval($uid)
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			);
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			if(count($r) > $maxreq) {
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				notice( sprintf( t('%s has received too many connection requests today.'),  $a->profile['name']) . EOL);
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				notice( t('Spam protection measures have been invoked.') . EOL);
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				notice( t('Friends are advised to please try again in 24 hours.') . EOL);
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				return;
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			} 
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		}
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		/**
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		 *
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		 * Cleanup old introductions that remain blocked. 
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		 * Also remove the contact record, but only if there is no existing relationship
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		 *
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		 */
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		$r = q("SELECT `intro`.*, `intro`.`id` AS `iid`, `contact`.`id` AS `cid`, `contact`.`rel` 
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			FROM `intro` LEFT JOIN `contact` on `intro`.`contact-id` = `contact`.`id`
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			WHERE `intro`.`blocked` = 1 AND `contact`.`self` = 0 AND `intro`.`datetime` < UTC_TIMESTAMP() - INTERVAL 30 MINUTE ");
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		if(count($r)) {
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			foreach($r as $rr) {
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				if(! $rr['rel']) {
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					q("DELETE FROM `contact` WHERE `id` = %d LIMIT 1",
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						intval($rr['cid'])
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					);
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				}
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				q("DELETE FROM `intro` WHERE `id` = %d LIMIT 1",
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					intval($rr['iid'])
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				);
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			}
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		}
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		$url = trim($_POST['dfrn_url']);
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		if(! strlen($url)) {
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			notice( t("Invalid locator") . EOL );
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			return;
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		}
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		// Canonicalise email-style profile locator
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		$url = webfinger_dfrn($url);
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		if(substr($url,0,5) === 'stat:') {
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			$network = 'stat';
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			$url = substr($url,5);
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		}
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		else {
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			$network = 'dfrn';
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		}
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		logger('dfrn_request: url: ' . $url);
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		if(! strlen($url)) {
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			notice( t("Unable to resolve your name at the provided location.") . EOL);			
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			return;
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		}
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		if($network === 'dfrn') {
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			$ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' AND `self` = 0 LIMIT 1", 
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				intval($uid),
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				dbesc($url)
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			);
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			if(count($ret)) {
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				if(strlen($ret[0]['issued-id'])) {
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					notice( t('You have already introduced yourself here.') . EOL );
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					return;
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				}
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				elseif($ret[0]['rel'] == REL_BUD) {
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					notice( sprintf( t('Apparently you are already friends with %s.'), $a->profile['name']) . EOL);
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					return;
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				}
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				else {
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					$contact_record = $ret[0];
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					$parms = array('dfrn-request' => $ret[0]['request']);
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				}
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			}
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			$issued_id = random_string();
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			if(is_array($contact_record)) {
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				// There is a contact record but no issued-id, so this
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				// is a reciprocal introduction from a known contact
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				$r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d LIMIT 1",
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					dbesc($issued_id),
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					intval($contact_record['id'])
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				);
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			}
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			else {
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				if(! validate_url($url)) {
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					notice( t('Invalid profile URL.') . EOL);
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					goaway($a->get_baseurl() . '/' . $a->cmd);
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					return; // NOTREACHED
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				}
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				if(! allowed_url($url)) {
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					notice( t('Disallowed profile URL.') . EOL);
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					goaway($a->get_baseurl() . '/' . $a->cmd);
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					return; // NOTREACHED
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				}
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				require_once('Scrape.php');
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				$parms = scrape_dfrn($url);
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				if(! count($parms)) {
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					notice( t('Profile location is not valid or does not contain profile information.') . EOL );
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					goaway($a->get_baseurl() . '/' . $a->cmd);
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				}
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				else {
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					if(! x($parms,'fn'))
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						notice( t('Warning: profile location has no identifiable owner name.') . EOL );
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					if(! x($parms,'photo'))
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						notice( t('Warning: profile location has no profile photo.') . EOL );
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					$invalid = validate_dfrn($parms);		
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					if($invalid) {
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						notice( sprintf( tt("%d required parameter was not found at the given location",
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											"%d required parameters were not found at the given location",
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											$invalid), $invalid) . EOL );
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						return;
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					}
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				}
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				$parms['url'] = $url;
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				$parms['issued-id'] = $issued_id;
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				dbesc_array($parms);
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				$r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `name`, `nick`, `issued-id`, `photo`, `site-pubkey`,
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					`request`, `confirm`, `notify`, `poll` )
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					VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )",
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					intval($uid),
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					datetime_convert(),
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					$parms['url'],
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					$parms['fn'],
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					$parms['nick'],
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					$parms['issued-id'],
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					$parms['photo'],
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					$parms['key'],
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					$parms['dfrn-request'],
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					$parms['dfrn-confirm'],
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					$parms['dfrn-notify'],
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					$parms['dfrn-poll']
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				);
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				// find the contact record we just created
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				if($r) {	
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					$r = q("SELECT `id` FROM `contact` 
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						WHERE `uid` = %d AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
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						intval($uid),
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						$parms['url'],
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						$parms['issued-id']
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					);
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					if(count($r)) 
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						$contact_record = $r[0];
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				}
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			}
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			if($r === false) {
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				notice( t('Failed to update contact record.') . EOL );
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				return;
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			}
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			$hash = random_string() . (string) time();   // Generate a confirm_key
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			if(is_array($contact_record)) {
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				$ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
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					VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
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					intval($uid),
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					intval($contact_record['id']),
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					((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
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					dbesc(notags(trim($_POST['dfrn-request-message']))),
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					dbesc($hash),
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					dbesc(datetime_convert())
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				);
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			}
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			// This notice will only be seen by the requestor if the requestor and requestee are on the same server.
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			if(! $failed) 
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				notice( t('Your introduction has been sent.') . EOL );
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			// "Homecoming" - send the requestor back to their site to record the introduction.
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			$dfrn_url = bin2hex($a->get_baseurl() . '/profile/' . $nickname);
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			$aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
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			goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url" 
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				. '&dfrn_version=' . DFRN_PROTOCOL_VERSION 
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				. '&confirm_key='  . $hash 
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				. (($aes_allow) ? "&aes_allow=1" : "")
 | 
						|
			);
 | 
						|
			// NOTREACHED
 | 
						|
			// END $network === 'dfrn'
 | 
						|
		}
 | 
						|
		elseif($network === 'stat') {
 | 
						|
			
 | 
						|
			/**
 | 
						|
			 *
 | 
						|
			 * OStatus network
 | 
						|
			 * Check contact existence
 | 
						|
			 * Try and scrape together enough information to create a contact record, with us as REL_VIP
 | 
						|
			 * Substitute our user's feed URL into $url template
 | 
						|
			 * Send the subscriber home to subscribe
 | 
						|
			 *
 | 
						|
			 */
 | 
						|
 | 
						|
			$url = str_replace('{uri}', $a->get_baseurl() . '/dfrn_poll/' . $nickname, $url);
 | 
						|
			goaway($url);
 | 
						|
			// NOTREACHED
 | 
						|
			// END $network === 'stat'
 | 
						|
		}
 | 
						|
 | 
						|
	}	return;
 | 
						|
}}
 | 
						|
 | 
						|
 | 
						|
 | 
						|
 | 
						|
if(! function_exists('dfrn_request_content')) {
 | 
						|
function dfrn_request_content(&$a) {
 | 
						|
 | 
						|
	
 | 
						|
 | 
						|
	if(($a->argc != 2) || (! count($a->profile)))
 | 
						|
		return "";
 | 
						|
 | 
						|
 | 
						|
	// "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
 | 
						|
	// to send us to the post section to record the introduction.
 | 
						|
 | 
						|
	if(x($_GET,'dfrn_url')) {
 | 
						|
 | 
						|
		if(! local_user()) {
 | 
						|
			notice( t("Please login to confirm introduction.") . EOL );
 | 
						|
 | 
						|
			/* setup the return URL to come back to this page if they use openid */
 | 
						|
 | 
						|
			$stripped = str_replace('q=','',$a->query_string);
 | 
						|
			$_SESSION['return_url'] = trim($stripped,'/');
 | 
						|
 | 
						|
			return login();
 | 
						|
		}
 | 
						|
 | 
						|
		// Edge case, but can easily happen in the wild. This person is authenticated, 
 | 
						|
		// but not as the person who needs to deal with this request.
 | 
						|
 | 
						|
		if ($a->user['nickname'] != $a->argv[1]) {
 | 
						|
			notice( t("Incorrect identity currently logged in. Please login to <strong>this</strong> profile.") . EOL);
 | 
						|
			return login();
 | 
						|
		}
 | 
						|
 | 
						|
		$dfrn_url = notags(trim(hex2bin($_GET['dfrn_url'])));
 | 
						|
		$aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
 | 
						|
		$confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
 | 
						|
		$o .= load_view_file("view/dfrn_req_confirm.tpl");
 | 
						|
		$o  = replace_macros($o,array(
 | 
						|
			'$dfrn_url' => $dfrn_url,
 | 
						|
			'$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
 | 
						|
			'$confirm_key' => $confirm_key,
 | 
						|
			'$welcome' => sprintf( t('Welcome home %s.'), $a->user['username']),
 | 
						|
			'$please' => sprintf( t('Please confirm your introduction/connection request to %s.'), $dfrn_url),
 | 
						|
			'$submit' => t('Confirm'),
 | 
						|
			'$uid' => $_SESSION['uid'],
 | 
						|
			'$nickname' => $a->user['nickname'],
 | 
						|
			'dfrn_rawurl' => $_GET['dfrn_url']
 | 
						|
			));
 | 
						|
		return $o;
 | 
						|
 | 
						|
	}
 | 
						|
	elseif((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) { 
 | 
						|
 | 
						|
		// we are the requestee and it is now safe to send our user their introduction,
 | 
						|
		// We could just unblock it, but first we have to jump through a few hoops to 
 | 
						|
		// send an email, or even to find out if we need to send an email. 
 | 
						|
 | 
						|
		$intro = q("SELECT * FROM `intro` WHERE `hash` = '%s' LIMIT 1",
 | 
						|
			dbesc($_GET['confirm_key'])
 | 
						|
		);
 | 
						|
 | 
						|
		if(count($intro)) {
 | 
						|
 | 
						|
			$r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
 | 
						|
				WHERE `contact`.`id` = %d LIMIT 1",
 | 
						|
				intval($intro[0]['contact-id'])
 | 
						|
			);
 | 
						|
 | 
						|
			$auto_confirm = false;
 | 
						|
 | 
						|
			if(count($r)) {
 | 
						|
				if($r[0]['page-flags'] != PAGE_NORMAL)
 | 
						|
					$auto_confirm = true;				
 | 
						|
				if(($r[0]['notify-flags'] & NOTIFY_INTRO) && (! $auto_confirm)) {
 | 
						|
					$email_tpl = load_view_file('view/request_notify_eml.tpl');
 | 
						|
					$email = replace_macros($email_tpl, array(
 | 
						|
						'$requestor' => ((strlen(stripslashes($r[0]['name']))) ? stripslashes($r[0]['name']) : t('[Name Withheld]')),
 | 
						|
						'$url' => stripslashes($r[0]['url']),
 | 
						|
						'$myname' => $r[0]['username'],
 | 
						|
						'$siteurl' => $a->get_baseurl(),
 | 
						|
						'$sitename' => $a->config['sitename']
 | 
						|
					));
 | 
						|
					$res = mail($r[0]['email'], 
 | 
						|
					    t("Introduction received at ") . $a->config['sitename'],
 | 
						|
						$email,
 | 
						|
						'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] . "\n"
 | 
						|
						. 'Content-type: text/plain; charset=UTF-8' . "\n"
 | 
						|
						. 'Content-transfer-encoding: 8bit' );
 | 
						|
 | 
						|
					// This is a redundant notification - no point throwing errors if it fails.
 | 
						|
				}
 | 
						|
				if($auto_confirm) {
 | 
						|
					require_once('mod/dfrn_confirm.php');
 | 
						|
					$handsfree = array(
 | 
						|
						'uid' => $r[0]['uid'],
 | 
						|
						'node' => $r[0]['nickname'],
 | 
						|
						'dfrn_id' => $r[0]['issued-id'],
 | 
						|
						'intro_id' => $intro[0]['id'],
 | 
						|
						'duplex' => (($r[0]['page-flags'] == PAGE_FREELOVE) ? 1 : 0)
 | 
						|
					);
 | 
						|
					dfrn_confirm_post($a,$handsfree);
 | 
						|
				}
 | 
						|
 | 
						|
			}
 | 
						|
 | 
						|
			if(! $auto_confirm) {
 | 
						|
 | 
						|
				// If we are auto_confirming, this record will have already been nuked
 | 
						|
				// in dfrn_confirm_post()
 | 
						|
 | 
						|
				$r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s' LIMIT 1",
 | 
						|
					dbesc($_GET['confirm_key'])
 | 
						|
				);
 | 
						|
			}
 | 
						|
		}
 | 
						|
		killme();
 | 
						|
		return; // NOTREACHED
 | 
						|
	}
 | 
						|
	else {
 | 
						|
 | 
						|
		/**
 | 
						|
		 * Normal web request. Display our user's introduction form.
 | 
						|
		 */
 | 
						|
 
 | 
						|
		/**
 | 
						|
		 * Try to auto-fill the profile address
 | 
						|
		 */
 | 
						|
 | 
						|
		if(local_user()) {
 | 
						|
			if(strlen($a->path)) {
 | 
						|
				$myaddr = $a->get_baseurl() . '/profile/' . $a->user['nickname'];
 | 
						|
			}
 | 
						|
			else {
 | 
						|
				$myaddr = $a->user['nickname'] . '@' . substr($a->get_baseurl(), strpos($a->get_baseurl(),'://') + 3 );
 | 
						|
			}
 | 
						|
		}
 | 
						|
		elseif(x($_GET,'addr')) {
 | 
						|
			$myaddr = hex2bin($_GET['addr']);
 | 
						|
		}
 | 
						|
		else {
 | 
						|
			/* $_GET variables are already urldecoded */ 
 | 
						|
			$myaddr = ((x($_GET,'address')) ? $_GET['address'] : '');
 | 
						|
		}
 | 
						|
 | 
						|
		/**
 | 
						|
		 *
 | 
						|
		 * The auto_request form only has the profile address
 | 
						|
		 * because nobody is going to read the comments and 
 | 
						|
		 * it doesn't matter if they know you or not.
 | 
						|
		 *
 | 
						|
		 */
 | 
						|
 | 
						|
		if($a->profile['page-flags'] == PAGE_NORMAL)
 | 
						|
			$tpl = load_view_file('view/dfrn_request.tpl');
 | 
						|
		else
 | 
						|
			$tpl = load_view_file('view/auto_request.tpl');
 | 
						|
 | 
						|
		$o .= replace_macros($tpl,array(
 | 
						|
			'$header' => t('Friend/Connection Request'),
 | 
						|
			'$desc' => t('Examples: jojo@demo.friendika.com, http://demo.friendika.com/profile/jojo, testuser@identi.ca'),
 | 
						|
			'$pls_answer' => t('Please answer the following:'),
 | 
						|
			'$does_know' => t('Does $name know you?'),
 | 
						|
			'$yes' => t('Yes'),
 | 
						|
			'$no' => t('No'),
 | 
						|
			'$add_note' => t('Add a personal note:'),
 | 
						|
			'$page_desc' => t("Please enter your 'Identity Address' from one of the following supported social networks:"),
 | 
						|
			'$friendika' => t('Friendika'),
 | 
						|
			'$statusnet' => t('StatusNet/Federated Social Web'),
 | 
						|
			'$private_net' => t("Private \x28secure\x29 network"),
 | 
						|
			'$public_net' => t("Public \x28insecure\x29 network"),
 | 
						|
			'$your_address' => t('Your Identity Address:'),
 | 
						|
			'$submit' => t('Submit Request'),
 | 
						|
			'$cancel' => t('Cancel'),
 | 
						|
			'$nickname' => $a->argv[1],
 | 
						|
			'$name' => $a->profile['name'],
 | 
						|
			'$myaddr' => $myaddr
 | 
						|
		));
 | 
						|
		return $o;
 | 
						|
	}
 | 
						|
 | 
						|
	return; // Somebody is fishing.
 | 
						|
}} |