sforkowany z mirror/friendica
A bit more telemetry of friend confirms and lots of extra doco
to understand what is happening and why.2022.09-rc
Mike Macgirvin
rodzic
3531f466e5
commit
524f73e306
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@ -1,12 +1,288 @@
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<?php
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<?php
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// There are two possible entry points. Both are called via POST.
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function dfrn_confirm_post(&$a) {
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function dfrn_confirm_post(&$a) {
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if($a->argc > 1)
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if($a->argc > 1)
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$node = $a->argv[1];
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$node = $a->argv[1];
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// Main entry point. Our user received a friend request notification (perhaps
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// from another site) and clicked 'Accept'. $POST['source_url'] is not set.
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// They will perform the following:
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if(! x($_POST,'source_url')) {
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$uid = get_uid();
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if(! $uid) {
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notice( t('Permission denied.') . EOL );
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return;
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}
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// These come from the friend request notification form.
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$dfrn_id = ((x($_POST,'dfrn_id')) ? notags(trim($_POST['dfrn_id'])) : "");
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$intro_id = intval($_POST['intro_id']);
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$duplex = intval($_POST['duplex']);
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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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$r = q("SELECT * FROM `contact` WHERE `issued-id` = '%s' AND `uid` = %d LIMIT 1",
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dbesc($dfrn_id),
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intval($uid)
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);
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if(! count($r)) {
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notice( t('Contact not found.') . EOL );
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return;
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}
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$contact_id = $r[0]['id'];
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$relation = $r[0]['rel'];
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$site_pubkey = $r[0]['site-pubkey'];
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$dfrn_confirm = $r[0]['confirm'];
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$aes_allow = $r[0]['aes_allow'];
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// Generate a key pair for all further communications with this person.
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// We have a keypair for every contact, and a site key for unknown people.
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// This provides a means to carry on relationships with other people if
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// any single key is compromised. It is a robust key. We're much more
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// worried about key leakage than anybody cracking it.
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$res = openssl_pkey_new(array(
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'digest_alg' => 'whirlpool',
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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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// Per the protocol document, 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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// 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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// Note: We can send any of these things as binary blobs because they are being POST'ed.
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// Any protocol conversations (notify, poll) which perform GET require bin2hex of all the
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// binary stuff.
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$src_aes_key = random_string();
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$result = '';
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openssl_private_encrypt($dfrn_id,$result,$a->user['prvkey']);
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$params['dfrn_id'] = $result;
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$params['public_key'] = $public_key;
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$my_url = $a->get_baseurl() . '/profile/' . $a->user['nickname'];
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openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
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if($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['public_key'] = openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key);
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}
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$params['dfrn_version'] = '2.0';
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if($duplex == 1)
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$params['duplex'] = 1;
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// POST all this stuff to the other site.
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$res = post_url($dfrn_confirm,$params);
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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 = simplexml_load_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($status != 0)
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return;
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// We have now established a relationship with the other site.
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// Let's make our own personal copy of their profile photo so we don't have
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// to always load it from their site.
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require_once("Photo.php");
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$photo_failure = false;
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$r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
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intval($contact_id));
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if(count($r)) {
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$filename = basename($r[0]['photo']);
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$img_str = fetch_url($r[0]['photo'],true);
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$img = new Photo($img_str);
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if($img->is_valid()) {
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$img->scaleImageSquare(175);
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$hash = photo_new_resource();
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$r = $img->store($uid, $contact_id, $hash, $filename, t('Contact Photos'), 4 );
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if($r === false)
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$photo_failure = true;
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$img->scaleImage(80);
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$r = $img->store($uid, $contact_id, $hash, $filename, t('Contact Photos'), 5 );
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if($r === false)
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$photo_failure = true;
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$photo = $a->get_baseurl() . '/photo/' . $hash . '-4.jpg';
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$thumb = $a->get_baseurl() . '/photo/' . $hash . '-5.jpg';
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}
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else
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$photo_failure = true;
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}
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else
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$photo_failure = true;
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if($photo_failure) {
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$photo = $a->get_baseurl() . '/images/default-profile.jpg';
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$thumb = $a->get_baseurl() . '/images/default-profile-sm.jpg';
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}
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$new_relation = REL_VIP;
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if(($relation == REL_FAN) || ($duplex))
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$new_relation = REL_BUD;
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$r = q("UPDATE `contact` SET `photo` = '%s',
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`thumb` = '%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($photo),
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dbesc($thumb),
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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($contact_id)
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);
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if($r === false)
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notice( t('Unable to set contact photo.') . EOL);
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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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goaway($a->get_baseurl() . '/contacts/' . intval($contact_id));
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return; //NOTREACHED
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}
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// End of first scenario. [Local confirmation of remote friend request].
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// Begin scenario two. 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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if(x($_POST,'source_url')) {
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if(x($_POST,'source_url')) {
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// We are processing an external confirmation to an introduction created by our user.
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// We are processing an external confirmation to an introduction created by our user.
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@ -170,7 +446,7 @@ function dfrn_confirm_post(&$a) {
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intval($duplex),
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intval($duplex),
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intval($dfrn_record)
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intval($dfrn_record)
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);
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);
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if($r === false) { // should not happen unless schema is messed up
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if($r === false) { // indicates schema is messed up or total db failure
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$message = t('Unable to update your contact profile details on our system');
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$message = t('Unable to update your contact profile details on our system');
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xml_status(3,$message);
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xml_status(3,$message);
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}
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}
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@ -207,229 +483,12 @@ function dfrn_confirm_post(&$a) {
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xml_status(0); // Success
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xml_status(0); // Success
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return; // NOTREACHED
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return; // NOTREACHED
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////////////////////// End of this scenario ///////////////////////////////////////////////
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////////////////////// End of this scenario ///////////////////////////////////////////////
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}
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}
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else {
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// We are processing a local confirmation initiated on this system by our user to an external introduction.
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// somebody arrived here by mistake or they are fishing. Send them to the homepage.
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$uid = get_uid();
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goaway($a->get_baseurl());
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// NOTREACHED
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if(! $uid) {
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notice( t('Permission denied.') . EOL );
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return;
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}
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$dfrn_id = ((x($_POST,'dfrn_id')) ? notags(trim($_POST['dfrn_id'])) : "");
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$intro_id = intval($_POST['intro_id']);
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$duplex = intval($_POST['duplex']);
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$r = q("SELECT * FROM `contact` WHERE `issued-id` = '%s' AND `uid` = %d LIMIT 1",
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dbesc($dfrn_id),
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intval($uid)
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);
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if(! count($r)) {
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notice( t('Node does not exist.') . EOL );
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return;
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}
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$contact_id = $r[0]['id'];
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$relation = $r[0]['rel'];
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$site_pubkey = $r[0]['site-pubkey'];
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$dfrn_confirm = $r[0]['confirm'];
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$aes_allow = $r[0]['aes_allow'];
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$res = openssl_pkey_new(array(
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|
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'digest_alg' => 'whirlpool',
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|
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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 = $pubkey["key"];
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$r = q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d LIMIT 1",
|
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||||||
dbesc($private_key),
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|
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intval($contact_id),
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intval($uid)
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);
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$params = array();
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$src_aes_key = random_string();
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$result = '';
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openssl_private_encrypt($dfrn_id,$result,$a->user['prvkey']);
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$params['dfrn_id'] = $result;
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$params['public_key'] = $public_key;
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$my_url = $a->get_baseurl() . '/profile/' . $a->user['nickname'];
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openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
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if($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['public_key'] = openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key);
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}
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$params['dfrn_version'] = '2.0';
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if($duplex == 1)
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|
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$params['duplex'] = 1;
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$res = post_url($dfrn_confirm,$params);
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|
||||||
// Try to be robust if the remote site is having difficulty and throwing up
|
|
||||||
// errors of some kind.
|
|
||||||
|
|
||||||
$leading_junk = substr($res,0,strpos($res,'<?xml'));
|
|
||||||
|
|
||||||
$res = substr($res,strpos($res,'<?xml'));
|
|
||||||
if(! strlen($res)) {
|
|
||||||
|
|
||||||
// No XML at all, this exchange is messed up really bad.
|
|
||||||
// We shouldn't proceed, because the xml parser might choke,
|
|
||||||
// and $status is going to be zero, which indicates success.
|
|
||||||
// We can hardly call this a success.
|
|
||||||
|
|
||||||
notice( t('Response from remote site was not understood.') . EOL);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
if(strlen($leading_junk) && get_config('system','debugging')) {
|
|
||||||
|
|
||||||
// This might be more common. Mixed error text and some XML.
|
|
||||||
// If we're configured for debugging, show the text. Proceed in either case.
|
|
||||||
|
|
||||||
notice( t('Unexpected response from remote site: ') . EOL . $leading_junk . EOL );
|
|
||||||
}
|
|
||||||
|
|
||||||
$xml = simplexml_load_string($res);
|
|
||||||
$status = (int) $xml->status;
|
|
||||||
$message = unxmlify($xml->message);
|
|
||||||
switch($status) {
|
|
||||||
case 0:
|
|
||||||
notice( t("Confirmation completed successfully.") . EOL);
|
|
||||||
if(strlen($message))
|
|
||||||
notice( t('Remote site reported: ') . $message . EOL);
|
|
||||||
break;
|
|
||||||
case 1:
|
|
||||||
// birthday paradox - generate new dfrn-id and fall through.
|
|
||||||
$new_dfrn_id = random_string();
|
|
||||||
$r = q("UPDATE contact SET `issued-id` = '%s' WHERE `id` = %d AND `uid` = %d LIMIT 1",
|
|
||||||
dbesc($new_dfrn_id),
|
|
||||||
intval($contact_id),
|
|
||||||
intval($uid)
|
|
||||||
);
|
|
||||||
|
|
||||||
case 2:
|
|
||||||
notice( t("Temporary failure. Please wait and try again.") . EOL);
|
|
||||||
if(strlen($message))
|
|
||||||
notice( t('Remote site reported: ') . $message . EOL);
|
|
||||||
break;
|
|
||||||
|
|
||||||
|
|
||||||
case 3:
|
|
||||||
notice( t("Introduction failed or was revoked.") . EOL);
|
|
||||||
if(strlen($message))
|
|
||||||
notice( t('Remote site reported: ') . $message . EOL);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
if(($status == 0) && ($intro_id)) {
|
|
||||||
|
|
||||||
//delete the notification
|
|
||||||
|
|
||||||
$r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d LIMIT 1",
|
|
||||||
intval($intro_id),
|
|
||||||
intval($uid)
|
|
||||||
);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
if($status != 0)
|
|
||||||
return;
|
|
||||||
|
|
||||||
require_once("Photo.php");
|
|
||||||
|
|
||||||
$photo_failure = false;
|
|
||||||
|
|
||||||
$r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
|
|
||||||
intval($contact_id));
|
|
||||||
if(count($r)) {
|
|
||||||
|
|
||||||
$filename = basename($r[0]['photo']);
|
|
||||||
$img_str = fetch_url($r[0]['photo'],true);
|
|
||||||
$img = new Photo($img_str);
|
|
||||||
if($img->is_valid()) {
|
|
||||||
|
|
||||||
$img->scaleImageSquare(175);
|
|
||||||
|
|
||||||
$hash = photo_new_resource();
|
|
||||||
|
|
||||||
$r = $img->store($uid, $contact_id, $hash, $filename, t('Contact Photos'), 4 );
|
|
||||||
|
|
||||||
if($r === false)
|
|
||||||
$photo_failure = true;
|
|
||||||
|
|
||||||
$img->scaleImage(80);
|
|
||||||
|
|
||||||
$r = $img->store($uid, $contact_id, $hash, $filename, t('Contact Photos'), 5 );
|
|
||||||
|
|
||||||
if($r === false)
|
|
||||||
$photo_failure = true;
|
|
||||||
|
|
||||||
$photo = $a->get_baseurl() . '/photo/' . $hash . '-4.jpg';
|
|
||||||
$thumb = $a->get_baseurl() . '/photo/' . $hash . '-5.jpg';
|
|
||||||
}
|
|
||||||
else
|
|
||||||
$photo_failure = true;
|
|
||||||
}
|
|
||||||
else
|
|
||||||
$photo_failure = true;
|
|
||||||
|
|
||||||
if($photo_failure) {
|
|
||||||
$photo = $a->get_baseurl() . '/images/default-profile.jpg';
|
|
||||||
$thumb = $a->get_baseurl() . '/images/default-profile-sm.jpg';
|
|
||||||
}
|
|
||||||
|
|
||||||
$new_relation = REL_VIP;
|
|
||||||
if(($relation == REL_FAN) || ($duplex))
|
|
||||||
$new_relation = REL_BUD;
|
|
||||||
|
|
||||||
$r = q("UPDATE `contact` SET `photo` = '%s',
|
|
||||||
`thumb` = '%s',
|
|
||||||
`rel` = %d,
|
|
||||||
`name-date` = '%s',
|
|
||||||
`uri-date` = '%s',
|
|
||||||
`avatar-date` = '%s',
|
|
||||||
`blocked` = 0,
|
|
||||||
`pending` = 0,
|
|
||||||
`duplex` = %d,
|
|
||||||
`network` = 'dfrn' WHERE `id` = %d LIMIT 1
|
|
||||||
",
|
|
||||||
dbesc($photo),
|
|
||||||
dbesc($thumb),
|
|
||||||
intval($new_relation),
|
|
||||||
dbesc(datetime_convert()),
|
|
||||||
dbesc(datetime_convert()),
|
|
||||||
dbesc(datetime_convert()),
|
|
||||||
intval($duplex),
|
|
||||||
intval($contact_id)
|
|
||||||
);
|
|
||||||
if($r === false)
|
|
||||||
notice( t('Unable to set contact photo.') . EOL);
|
|
||||||
|
|
||||||
goaway($a->get_baseurl() . '/contacts/' . intval($contact_id));
|
|
||||||
return; //NOTREACHED
|
|
||||||
}
|
|
||||||
return;
|
|
||||||
}
|
}
|
||||||
|
|
|
||||||
Ładowanie…
Reference in New Issue