<?php
-
+// There are two possible entry points. Both are called via POST.
function dfrn_confirm_post(&$a) {
if($a->argc > 1)
$node = $a->argv[1];
- if(x($_POST,'source_url')) {
-
- // We are processing an external confirmation to an introduction created by our user.
-
- $public_key = $_POST['public_key'];
- $dfrn_id = $_POST['dfrn_id'];
- $source_url = $_POST['source_url'];
- $aes_key = $_POST['aes_key'];
- $duplex = $_POST['duplex'];
- $version_id = $_POST['dfrn_version'];
-
- // Find our user's account
-
- $r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
- dbesc($node));
-
- if(! count($r)) {
- $message = t('No user record found for ') . '\'' . $node . '\'';
- xml_status(3,$message); // failure
- // NOTREACHED
- }
-
- $my_prvkey = $r[0]['prvkey'];
- $local_uid = $r[0]['uid'];
-
-
- if(! strstr($my_prvkey,'BEGIN RSA 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)) {
- // 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),
- intval($local_uid)
- );
- if(count($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.
-
- require_once("Photo.php");
-
- $photo_failure = false;
-
- $r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
- intval($dfrn_record));
- 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 = $img->store($local_uid, $dfrn_record, $hash, $filename, t('Contact Photos') , 4);
-
- if($r === false)
- $photo_failure = true;
-
- $img->scaleImage(80);
- $r = $img->store($local_uid, $dfrn_record, $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';
- }
-
- $new_relation = REL_FAN;
- if(($relation == REL_VIP) || ($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($duplex),
- intval($dfrn_record)
- );
- if($r === false) { // should not happen unless schema is messed up
- $message = t('Unable to update your contact profile details on our system');
- xml_status(3,$message);
- }
-
- // Otherwise everything seems to have worked and we are almost done. Yay!
- // Send an email notification
+ // Main entry point. Our user received a friend request notification (perhaps
+ // from another site) and clicked 'Accept'. $POST['source_url'] is not set.
+ // They will perform the following:
- $r = q("SELECT * FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
- WHERE `contact`.`id` = %d LIMIT 1",
- intval($dfrn_record)
- );
- if((count($r)) && ($r[0]['notify-flags'] & NOTIFY_CONFIRM)) {
-
- $tpl = (($new_relation == REL_BUD)
- ? load_view_file('view/friend_complete_eml.tpl')
- : load_view_file('view/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'], t("Connection accepted at ") . $a->config['sitename'],
- $email_tpl, 'From: ' . t('Administrator') . '@' . $_SERVER[SERVER_NAME] );
- if(!$res) {
- notice( t("Email notification failed.") . EOL );
- }
- }
- xml_status(0); // Success
- return; // NOTREACHED
-
- ////////////////////// End of this scenario ///////////////////////////////////////////////
- }
- else {
-
- // We are processing a local confirmation initiated on this system by our user to an external introduction.
+ if(! x($_POST,'source_url')) {
$uid = get_uid();
notice( t('Permission denied.') . EOL );
return;
}
+
+ // These come from the friend request notification form.
$dfrn_id = ((x($_POST,'dfrn_id')) ? notags(trim($_POST['dfrn_id'])) : "");
$intro_id = intval($_POST['intro_id']);
$duplex = intval($_POST['duplex']);
+
+ // The other person will have been issued an ID when they first requested friendship.
+ // Locate their record. At this time, their record will have both pending and blocked set to 1.
+
$r = q("SELECT * FROM `contact` WHERE `issued-id` = '%s' AND `uid` = %d LIMIT 1",
dbesc($dfrn_id),
intval($uid)
);
if(! count($r)) {
- notice( t('Node does not exist.') . EOL );
+ notice( t('Contact not found.') . EOL );
return;
}
$dfrn_confirm = $r[0]['confirm'];
$aes_allow = $r[0]['aes_allow'];
+
+ // Generate a key pair for all further communications with this person.
+ // We have a keypair for every contact, and a site key for unknown people.
+ // This provides a means to carry on relationships with other people if
+ // any single key is compromised. It is a robust key. We're much more
+ // worried about key leakage than anybody cracking it.
+
$res = openssl_pkey_new(array(
'digest_alg' => 'whirlpool',
'private_key_bits' => 4096,
$pubkey = openssl_pkey_get_details($res);
$public_key = $pubkey["key"];
+ // Save the private key. Send them the public key.
+
$r = q("UPDATE `contact` SET `prvkey` = '%s' WHERE `id` = %d AND `uid` = %d LIMIT 1",
dbesc($private_key),
intval($contact_id),
$params = array();
+ // Per the protocol document, we will verify both ends by encrypting the dfrn_id with our
+ // site private key (person on the other end can decrypt it with our site public key).
+ // Then encrypt our profile URL with the other person's site public key. They can decrypt
+ // it with their site private key. If the decryption on the other end fails for either
+ // item, it indicates tampering or key failure on at least one site and we will not be
+ // able to provide a secure communication pathway.
+
+ // If other site is willing to accept full encryption, (aes_allow is 1 AND we have php5.3
+ // or later) then we encrypt the personal public key we send them using AES-256-CBC and a
+ // random key which is encrypted with their site public key.
+
+ // Note: We can send any of these things as binary blobs because they are being POST'ed.
+ // Any protocol conversations (notify, poll) which perform GET require bin2hex of all the
+ // binary stuff.
+
$src_aes_key = random_string();
$result = '';
if($duplex == 1)
$params['duplex'] = 1;
+ // POST all this stuff to the other site.
+
$res = post_url($dfrn_confirm,$params);
- // Try to be robust if the remote site is having difficulty and throwing up
- // errors of some kind.
+ // Now figure out what they responded. 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'));
$xml = simplexml_load_string($res);
$status = (int) $xml->status;
- $message = unxmlify($xml->message);
+ $message = unxmlify($xml->message); // human readable text of what may have gone wrong.
switch($status) {
case 0:
notice( t("Confirmation completed successfully.") . EOL);
if(($status == 0) && ($intro_id)) {
- //delete the notification
+ // Success. Delete the notification.
$r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d LIMIT 1",
intval($intro_id),
if($status != 0)
return;
+ // We have now established a relationship with the other site.
+ // Let's make our own personal copy of their profile photo so we don't have
+ // to always load it from their site.
+
require_once("Photo.php");
$photo_failure = false;
if($r === false)
notice( t('Unable to set contact photo.') . EOL);
+
+ // Let's send our user to the contact editor in case they want to
+ // do anything special with this new friend.
+
goaway($a->get_baseurl() . '/contacts/' . intval($contact_id));
return; //NOTREACHED
}
- return;
+
+
+
+ // End of first scenario. [Local confirmation of remote friend request].
+
+
+
+ // Begin scenario two. This is the remote response to the above scenario.
+ // This will take place on the site that originally initiated the friend request.
+ // In the section above where the confirming party makes a POST and
+ // retrieves xml status information, they are communicating with the following code.
+
+ if(x($_POST,'source_url')) {
+
+ // We are processing an external confirmation to an introduction created by our user.
+
+ $public_key = $_POST['public_key'];
+ $dfrn_id = $_POST['dfrn_id'];
+ $source_url = $_POST['source_url'];
+ $aes_key = $_POST['aes_key'];
+ $duplex = $_POST['duplex'];
+ $version_id = $_POST['dfrn_version'];
+
+ // Find our user's account
+
+ $r = q("SELECT * FROM `user` WHERE `nickname` = '%s' LIMIT 1",
+ dbesc($node));
+
+ if(! count($r)) {
+ $message = t('No user record found for ') . '\'' . $node . '\'';
+ xml_status(3,$message); // failure
+ // NOTREACHED
+ }
+
+ $my_prvkey = $r[0]['prvkey'];
+ $local_uid = $r[0]['uid'];
+
+
+ if(! strstr($my_prvkey,'BEGIN RSA 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)) {
+ // 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),
+ intval($local_uid)
+ );
+ if(count($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.
+
+ require_once("Photo.php");
+
+ $photo_failure = false;
+
+ $r = q("SELECT `photo` FROM `contact` WHERE `id` = %d LIMIT 1",
+ intval($dfrn_record));
+ 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 = $img->store($local_uid, $dfrn_record, $hash, $filename, t('Contact Photos') , 4);
+
+ if($r === false)
+ $photo_failure = true;
+
+ $img->scaleImage(80);
+ $r = $img->store($local_uid, $dfrn_record, $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';
+ }
+
+ $new_relation = REL_FAN;
+ if(($relation == REL_VIP) || ($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($duplex),
+ intval($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
+
+ $r = q("SELECT * FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
+ WHERE `contact`.`id` = %d LIMIT 1",
+ intval($dfrn_record)
+ );
+ if((count($r)) && ($r[0]['notify-flags'] & NOTIFY_CONFIRM)) {
+
+ $tpl = (($new_relation == REL_BUD)
+ ? load_view_file('view/friend_complete_eml.tpl')
+ : load_view_file('view/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'], t("Connection accepted at ") . $a->config['sitename'],
+ $email_tpl, 'From: ' . t('Administrator') . '@' . $_SERVER[SERVER_NAME] );
+ if(!$res) {
+ notice( t("Email notification failed.") . EOL );
+ }
+ }
+ 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($a->get_baseurl());
+ // NOTREACHED
+
}
projects / friendica.git / commitdiff