688 lines
20 KiB
PHP
688 lines
20 KiB
PHP
<?php
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/*
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* Module: dfrn_confirm
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* Purpose: Friendship acceptance for DFRN contacts
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*
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* There are two possible entry points and three scenarios.
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*
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* 1. A form was submitted by our user approving a friendship that originated elsewhere.
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* This may also be called from dfrn_request to automatically approve a friendship.
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*
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* 2. We may be the target or other side of the conversation to scenario 1, and will
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* interact with that process on our own user's behalf.
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*
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*/
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function dfrn_confirm_post(&$a,$handsfree = null) {
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if(is_array($handsfree)) {
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/**
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* We were called directly from dfrn_request due to automatic friend acceptance.
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* Any $_POST parameters we may require are supplied in the $handsfree array.
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*
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*/
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$node = $handsfree['node'];
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$a->interactive = false; // notice() becomes a no-op since nobody is there to see it
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}
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else {
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if($a->argc > 1)
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$node = $a->argv[1];
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}
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/**
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*
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* Main entry point. Scenario 1. Our user received a friend request notification (perhaps
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* from another site) and clicked 'Approve'.
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* $POST['source_url'] is not set. If it is, it indicates Scenario 2.
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*
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* We may also have been called directly from dfrn_request ($handsfree != null) due to
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* this being a page type which supports automatic friend acceptance. That is also Scenario 1
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* since we are operating on behalf of our registered user to approve a friendship.
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*
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*/
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if(! x($_POST,'source_url')) {
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$uid = ((is_array($handsfree)) ? $handsfree['uid'] : local_user());
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if(! $uid) {
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notice( t('Permission denied.') . EOL );
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return;
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}
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$user = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
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intval($uid)
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);
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if(! $user) {
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notice( t('Profile not found.') . EOL );
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return;
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}
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// These data elements may come from either the friend request notification form or $handsfree array.
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if(is_array($handsfree)) {
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logger('dfrn_confirm: Confirm in handsfree mode');
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$dfrn_id = $handsfree['dfrn_id'];
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$intro_id = $handsfree['intro_id'];
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$duplex = $handsfree['duplex'];
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}
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else {
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$dfrn_id = ((x($_POST,'dfrn_id')) ? notags(trim($_POST['dfrn_id'])) : "");
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$intro_id = ((x($_POST,'intro_id')) ? intval($_POST['intro_id']) : 0 );
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$duplex = ((x($_POST,'duplex')) ? intval($_POST['duplex']) : 0 );
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$cid = ((x($_POST,'contact_id')) ? intval($_POST['contact_id']) : 0 );
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}
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/**
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*
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* Ensure that dfrn_id has precedence when we go to find the contact record.
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* We only want to search based on contact id if there is no dfrn_id,
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* e.g. for OStatus network followers.
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*
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*/
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if(strlen($dfrn_id))
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$cid = 0;
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logger('dfrn_confirm: Confirming request for dfrn_id (issued) ' . $dfrn_id);
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if($cid)
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logger('dfrn_confirm: Confirming follower with contact_id: ' . $cid);
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/**
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*
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* The other person will have been issued an ID when they first requested friendship.
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* Locate their record. At this time, their record will have both pending and blocked set to 1.
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* There won't be any dfrn_id if this is a network follower, so use the contact_id instead.
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*
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*/
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$r = q("SELECT * FROM `contact` WHERE ( ( `issued-id` != '' AND `issued-id` = '%s' ) OR ( `id` = %d AND `id` != 0 ) ) AND `uid` = %d LIMIT 1",
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dbesc($dfrn_id),
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intval($cid),
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intval($uid)
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);
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if(! count($r)) {
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logger('dfrn_confirm: Contact not found in DB.');
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notice( t('Contact not found.') . EOL );
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return;
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}
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$contact = $r[0];
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$contact_id = $contact['id'];
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$relation = $contact['rel'];
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$site_pubkey = $contact['site-pubkey'];
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$dfrn_confirm = $contact['confirm'];
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$aes_allow = $contact['aes_allow'];
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$network = ((strlen($contact['issued-id'])) ? 'dfrn' : 'stat');
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if($network === 'dfrn') {
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/**
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*
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* Generate a key pair for all further communications with this person.
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* We have a keypair for every contact, and a site key for unknown people.
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* This provides a means to carry on relationships with other people if
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* any single key is compromised. It is a robust key. We're much more
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* worried about key leakage than anybody cracking it.
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*
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*/
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$res = openssl_pkey_new(array(
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'digest_alg' => 'sha1',
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'private_key_bits' => 4096,
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'encrypt_key' => false )
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);
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$private_key = '';
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openssl_pkey_export($res, $private_key);
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$pubkey = openssl_pkey_get_details($res);
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$public_key = $pubkey["key"];
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// Save the private key. Send them the public key.
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$r = q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d LIMIT 1",
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dbesc($private_key),
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intval($contact_id),
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intval($uid)
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);
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$params = array();
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/**
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*
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* Per the DFRN protocol, we will verify both ends by encrypting the dfrn_id with our
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* site private key (person on the other end can decrypt it with our site public key).
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* Then encrypt our profile URL with the other person's site public key. They can decrypt
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* it with their site private key. If the decryption on the other end fails for either
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* item, it indicates tampering or key failure on at least one site and we will not be
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* able to provide a secure communication pathway.
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*
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* If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3
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* or later) then we encrypt the personal public key we send them using AES-256-CBC and a
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* random key which is encrypted with their site public key.
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*
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*/
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$src_aes_key = random_string();
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$result = '';
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openssl_private_encrypt($dfrn_id,$result,$user[0]['prvkey']);
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$params['dfrn_id'] = bin2hex($result);
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$params['public_key'] = $public_key;
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$my_url = $a->get_baseurl() . '/profile/' . $user[0]['nickname'];
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openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
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$params['source_url'] = bin2hex($params['source_url']);
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if($aes_allow && function_exists('openssl_encrypt')) {
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openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
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$params['aes_key'] = bin2hex($params['aes_key']);
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$params['public_key'] = bin2hex(openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key));
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}
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$params['dfrn_version'] = DFRN_PROTOCOL_VERSION ;
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if($duplex == 1)
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$params['duplex'] = 1;
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logger('dfrn_confirm: Confirm: posting data to ' . $dfrn_confirm . ': ' . print_r($params,true), LOGGER_DATA);
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/**
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*
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* POST all this stuff to the other site.
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* Temporarily raise the network timeout to 120 seconds because the default 60
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* doesn't always give the other side quite enough time to decrypt everything.
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*
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*/
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$a->config['system']['curl_timeout'] = 120;
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$res = post_url($dfrn_confirm,$params);
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logger('dfrn_confirm: Confirm: received data: ' . $res, LOGGER_DATA);
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// Now figure out what they responded. Try to be robust if the remote site is
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// having difficulty and throwing up errors of some kind.
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$leading_junk = substr($res,0,strpos($res,'<?xml'));
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$res = substr($res,strpos($res,'<?xml'));
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if(! strlen($res)) {
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// No XML at all, this exchange is messed up really bad.
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// We shouldn't proceed, because the xml parser might choke,
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// and $status is going to be zero, which indicates success.
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// We can hardly call this a success.
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notice( t('Response from remote site was not understood.') . EOL);
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return;
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}
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if(strlen($leading_junk) && get_config('system','debugging')) {
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// This might be more common. Mixed error text and some XML.
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// If we're configured for debugging, show the text. Proceed in either case.
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notice( t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL );
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}
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$xml = parse_xml_string($res);
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$status = (int) $xml->status;
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$message = unxmlify($xml->message); // human readable text of what may have gone wrong.
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switch($status) {
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case 0:
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notice( t("Confirmation completed successfully.") . EOL);
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if(strlen($message))
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notice( t('Remote site reported: ') . $message . EOL);
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break;
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case 1:
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// birthday paradox - generate new dfrn-id and fall through.
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$new_dfrn_id = random_string();
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$r = q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d LIMIT 1",
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dbesc($new_dfrn_id),
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intval($contact_id),
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intval($uid)
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);
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case 2:
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notice( t("Temporary failure. Please wait and try again.") . EOL);
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if(strlen($message))
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notice( t('Remote site reported: ') . $message . EOL);
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break;
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case 3:
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notice( t("Introduction failed or was revoked.") . EOL);
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if(strlen($message))
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notice( t('Remote site reported: ') . $message . EOL);
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break;
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}
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if(($status == 0) && ($intro_id)) {
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// Success. Delete the notification.
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$r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d LIMIT 1",
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intval($intro_id),
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intval($uid)
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);
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}
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if($status != 0)
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return;
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}
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/*
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*
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* We have now established a relationship with the other site.
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* Let's make our own personal copy of their profile photo so we don't have
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* to always load it from their site.
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*
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* We will also update the contact record with the nature and scope of the relationship.
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*
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*/
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require_once("Photo.php");
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$photos = import_profile_photo($contact['photo'],$uid,$contact_id);
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logger('dfrn_confirm: confirm - imported photos');
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if($network === 'dfrn') {
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$new_relation = CONTACT_IS_FOLLOWER;
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if(($relation == CONTACT_IS_SHARING) || ($duplex))
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$new_relation = CONTACT_IS_FRIEND;
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if(($relation == CONTACT_IS_SHARING) && ($duplex))
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$duplex = 0;
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$r = q("UPDATE `contact` SET `photo` = '%s',
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`thumb` = '%s',
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`micro` = '%s',
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`rel` = %d,
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`name-date` = '%s',
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`uri-date` = '%s',
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`avatar-date` = '%s',
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`blocked` = 0,
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`pending` = 0,
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`duplex` = %d,
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`network` = 'dfrn' WHERE `id` = %d LIMIT 1
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",
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dbesc($photos[0]),
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dbesc($photos[1]),
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dbesc($photos[2]),
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intval($new_relation),
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dbesc(datetime_convert()),
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dbesc(datetime_convert()),
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dbesc(datetime_convert()),
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intval($duplex),
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intval($contact_id)
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);
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}
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else {
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// $network !== 'dfrn'
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$notify = '';
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$poll = '';
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$arr = lrdd($contact['url']);
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if(count($arr)) {
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foreach($arr as $link) {
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if($link['@attributes']['rel'] === 'salmon')
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$notify = $link['@attributes']['href'];
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if($link['@attributes']['rel'] === NAMESPACE_FEED)
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$poll = $link['@attributes']['href'];
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}
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}
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$r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d LIMIT 1",
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intval($intro_id),
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intval($uid)
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);
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$r = q("UPDATE `contact` SET `photo` = '%s',
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`thumb` = '%s',
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`micro` = '%s',
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`name-date` = '%s',
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`uri-date` = '%s',
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`avatar-date` = '%s',
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`notify` = '%s',
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`poll` = '%s',
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`blocked` = 0,
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`pending` = 0,
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`network` = 'stat'
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WHERE `id` = %d LIMIT 1
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",
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dbesc($photos[0]),
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dbesc($photos[1]),
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dbesc($photos[2]),
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dbesc(datetime_convert()),
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dbesc(datetime_convert()),
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dbesc(datetime_convert()),
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dbesc($notify),
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dbesc($poll),
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intval($contact_id)
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);
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}
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if($r === false)
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notice( t('Unable to set contact photo.') . EOL);
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// reload contact info
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$r = q("SELECT * FROM `contact` WHERE `id` = %d LIMIT 1",
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intval($contact_id)
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);
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if(count($r))
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$contact = $r[0];
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else
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$contact = null;
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// Send a new friend post if we are allowed to...
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$r = q("SELECT `hide-friends` FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
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intval($uid)
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);
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if((count($r)) && ($r[0]['hide-friends'] == 0) && (is_array($contact)) && isset($new_relation) && ($new_relation == CONTACT_IS_FRIEND)) {
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require_once('include/items.php');
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$self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
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intval($uid)
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);
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if(count($self)) {
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$arr = array();
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$arr['uri'] = $arr['parent-uri'] = item_new_uri($a->get_hostname(), $uid);
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$arr['uid'] = $uid;
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$arr['contact-id'] = $self[0]['id'];
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$arr['wall'] = 1;
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$arr['type'] = 'wall';
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$arr['gravity'] = 0;
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$arr['author-name'] = $arr['owner-name'] = $self[0]['name'];
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$arr['author-link'] = $arr['owner-link'] = $self[0]['url'];
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$arr['author-avatar'] = $arr['owner-avatar'] = $self[0]['thumb'];
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$arr['verb'] = ACTIVITY_FRIEND;
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$arr['object-type'] = ACTIVITY_OBJ_PERSON;
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$A = '[url=' . $self[0]['url'] . ']' . $self[0]['name'] . '[/url]';
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$B = '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]';
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$BPhoto = '[url=' . $contact['url'] . ']' . '[img]' . $contact['thumb'] . '[/img][/url]';
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$arr['body'] = sprintf( t('%1$s is now friends with %2$s'), $A, $B)."\n\n\n".$Bphoto;
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$arr['object'] = '<object><type>' . ACTIVITY_OBJ_PERSON . '</type><title>' . $contact['name'] . '</title>'
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. '<id>' . $contact['url'] . '/' . $contact['name'] . '</id>';
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$arr['object'] .= '<link>' . xmlify('<link rel="alternate" type="text/html" href="' . $contact['url'] . '" />' . "\n");
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$arr['object'] .= xmlify('<link rel="photo" type="image/jpeg" href="' . $contact['thumb'] . '" />' . "\n");
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$arr['object'] .= '</link></object>' . "\n";
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$arr['last-child'] = 1;
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$arr['allow_cid'] = $user[0]['allow_cid'];
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$arr['allow_gid'] = $user[0]['allow_gid'];
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$arr['deny_cid'] = $user[0]['deny_cid'];
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$arr['deny_gid'] = $user[0]['deny_gid'];
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$i = item_store($arr);
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if($i)
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proc_run('php',"include/notifier.php","activity","$i");
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}
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}
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// Let's send our user to the contact editor in case they want to
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// do anything special with this new friend.
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if($handsfree === null)
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goaway($a->get_baseurl() . '/contacts/' . intval($contact_id));
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else
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return;
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//NOTREACHED
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}
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/**
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*
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*
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* End of Scenario 1. [Local confirmation of remote friend request].
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*
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* Begin Scenario 2. This is the remote response to the above scenario.
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* This will take place on the site that originally initiated the friend request.
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* In the section above where the confirming party makes a POST and
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* retrieves xml status information, they are communicating with the following code.
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*
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*/
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if(x($_POST,'source_url')) {
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// We are processing an external confirmation to an introduction created by our user.
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$public_key = ((x($_POST,'public_key')) ? $_POST['public_key'] : '');
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$dfrn_id = ((x($_POST,'dfrn_id')) ? hex2bin($_POST['dfrn_id']) : '');
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$source_url = ((x($_POST,'source_url')) ? hex2bin($_POST['source_url']) : '');
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$aes_key = ((x($_POST,'aes_key')) ? $_POST['aes_key'] : '');
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$duplex = ((x($_POST,'duplex')) ? intval($_POST['duplex']) : 0 );
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$version_id = ((x($_POST,'dfrn_version')) ? (float) $_POST['dfrn_version'] : 2.0);
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logger('dfrn_confirm: requestee contacted: ' . $node);
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logger('dfrn_confirm: request: POST=' . print_r($_POST,true), LOGGER_DATA);
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// If $aes_key is set, both of these items require unpacking from the hex transport encoding.
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if(x($aes_key)) {
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$aes_key = hex2bin($aes_key);
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$public_key = hex2bin($public_key);
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}
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// Find our user's account
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$r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
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dbesc($node));
|
|
|
|
if(! count($r)) {
|
|
$message = sprintf(t('No user record found for \'%s\' '), $node);
|
|
xml_status(3,$message); // failure
|
|
// NOTREACHED
|
|
}
|
|
|
|
$my_prvkey = $r[0]['prvkey'];
|
|
$local_uid = $r[0]['uid'];
|
|
|
|
|
|
if(! strstr($my_prvkey,'PRIVATE KEY')) {
|
|
$message = t('Our site encryption key is apparently messed up.');
|
|
xml_status(3,$message);
|
|
}
|
|
|
|
// verify everything
|
|
|
|
$decrypted_source_url = "";
|
|
openssl_private_decrypt($source_url,$decrypted_source_url,$my_prvkey);
|
|
|
|
|
|
if(! strlen($decrypted_source_url)) {
|
|
$message = t('Empty site URL was provided or URL could not be decrypted by us.');
|
|
xml_status(3,$message);
|
|
// NOTREACHED
|
|
}
|
|
|
|
$ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
|
|
dbesc($decrypted_source_url),
|
|
intval($local_uid)
|
|
);
|
|
if(! count($ret)) {
|
|
if(strstr($decrypted_source_url,'http:'))
|
|
$newurl = str_replace('http:','https:',$decrypted_source_url);
|
|
else
|
|
$newurl = str_replace('https:','http:',$decrypted_source_url);
|
|
|
|
$ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
|
|
dbesc($newurl),
|
|
intval($local_uid)
|
|
);
|
|
if(! count($r)) {
|
|
// this is either a bogus confirmation (?) or we deleted the original introduction.
|
|
$message = t('Contact record was not found for you on our site.');
|
|
xml_status(3,$message);
|
|
return; // NOTREACHED
|
|
}
|
|
}
|
|
|
|
$relation = $ret[0]['rel'];
|
|
|
|
// Decrypt all this stuff we just received
|
|
|
|
$foreign_pubkey = $ret[0]['site-pubkey'];
|
|
$dfrn_record = $ret[0]['id'];
|
|
|
|
$decrypted_dfrn_id = "";
|
|
openssl_public_decrypt($dfrn_id,$decrypted_dfrn_id,$foreign_pubkey);
|
|
|
|
if(strlen($aes_key)) {
|
|
$decrypted_aes_key = "";
|
|
openssl_private_decrypt($aes_key,$decrypted_aes_key,$my_prvkey);
|
|
$dfrn_pubkey = openssl_decrypt($public_key,'AES-256-CBC',$decrypted_aes_key);
|
|
}
|
|
else {
|
|
$dfrn_pubkey = $public_key;
|
|
}
|
|
|
|
$r = q("SELECT * FROM `contact` WHERE `dfrn-id` = '%s' LIMIT 1",
|
|
dbesc($decrypted_dfrn_id)
|
|
);
|
|
if(count($r)) {
|
|
$message = t('The ID provided by your system is a duplicate on our system. It should work if you try again.');
|
|
xml_status(1,$message); // Birthday paradox - duplicate dfrn-id
|
|
// NOTREACHED
|
|
}
|
|
|
|
$r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d LIMIT 1",
|
|
dbesc($decrypted_dfrn_id),
|
|
dbesc($dfrn_pubkey),
|
|
intval($dfrn_record)
|
|
);
|
|
if(! count($r)) {
|
|
$message = t('Unable to set your contact credentials on our system.');
|
|
xml_status(3,$message);
|
|
}
|
|
|
|
// We're good but now we have to scrape the profile photo and send notifications.
|
|
|
|
|
|
|
|
$r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
|
|
intval($dfrn_record));
|
|
|
|
if(count($r))
|
|
$photo = $r[0]['photo'];
|
|
else
|
|
$photo = $a->get_baseurl() . '/images/default-profile.jpg';
|
|
|
|
require_once("Photo.php");
|
|
|
|
$photos = import_profile_photo($photo,$local_uid,$dfrn_record);
|
|
|
|
logger('dfrn_confirm: request - photos imported');
|
|
|
|
$new_relation = CONTACT_IS_SHARING;
|
|
if(($relation == CONTACT_IS_FOLLOWER) || ($duplex))
|
|
$new_relation = CONTACT_IS_FRIEND;
|
|
|
|
if(($relation == CONTACT_IS_FOLLOWER) && ($duplex))
|
|
$duplex = 0;
|
|
|
|
$r = q("UPDATE `contact` SET
|
|
`photo` = '%s',
|
|
`thumb` = '%s',
|
|
`micro` = '%s',
|
|
`rel` = %d,
|
|
`name-date` = '%s',
|
|
`uri-date` = '%s',
|
|
`avatar-date` = '%s',
|
|
`blocked` = 0,
|
|
`pending` = 0,
|
|
`duplex` = %d,
|
|
`network` = 'dfrn' WHERE `id` = %d LIMIT 1
|
|
",
|
|
dbesc($photos[0]),
|
|
dbesc($photos[1]),
|
|
dbesc($photos[2]),
|
|
intval($new_relation),
|
|
dbesc(datetime_convert()),
|
|
dbesc(datetime_convert()),
|
|
dbesc(datetime_convert()),
|
|
intval($duplex),
|
|
intval($dfrn_record)
|
|
);
|
|
if($r === false) { // indicates schema is messed up or total db failure
|
|
$message = t('Unable to update your contact profile details on our system');
|
|
xml_status(3,$message);
|
|
}
|
|
|
|
// Otherwise everything seems to have worked and we are almost done. Yay!
|
|
// Send an email notification
|
|
|
|
logger('dfrn_confirm: request: info updated');
|
|
|
|
$r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
|
|
WHERE `contact`.`id` = %d LIMIT 1",
|
|
intval($dfrn_record)
|
|
);
|
|
if((count($r)) && ($r[0]['notify-flags'] & NOTIFY_CONFIRM)) {
|
|
|
|
push_lang($r[0]['language']);
|
|
$tpl = (($new_relation == CONTACT_IS_FRIEND)
|
|
? get_intltext_template('friend_complete_eml.tpl')
|
|
: get_intltext_template('intro_complete_eml.tpl'));
|
|
|
|
$email_tpl = replace_macros($tpl, array(
|
|
'$sitename' => $a->config['sitename'],
|
|
'$siteurl' => $a->get_baseurl(),
|
|
'$username' => $r[0]['username'],
|
|
'$email' => $r[0]['email'],
|
|
'$fn' => $r[0]['name'],
|
|
'$dfrn_url' => $r[0]['url'],
|
|
'$uid' => $newuid )
|
|
);
|
|
|
|
$res = mail($r[0]['email'], sprintf( t("Connection accepted at %s") , $a->config['sitename']),
|
|
$email_tpl,
|
|
'From: ' . t('Administrator') . '@' . $_SERVER['SERVER_NAME'] . "\n"
|
|
. 'Content-type: text/plain; charset=UTF-8' . "\n"
|
|
. 'Content-transfer-encoding: 8bit' );
|
|
|
|
if(!$res) {
|
|
// pointless throwing an error here and confusing the person at the other end of the wire.
|
|
}
|
|
pop_lang();
|
|
}
|
|
xml_status(0); // Success
|
|
return; // NOTREACHED
|
|
|
|
////////////////////// End of this scenario ///////////////////////////////////////////////
|
|
}
|
|
|
|
// somebody arrived here by mistake or they are fishing. Send them to the homepage.
|
|
|
|
goaway(z_root());
|
|
// NOTREACHED
|
|
|
|
}
|