friendica/mod/dfrn_confirm.php

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<?php
function dfrn_confirm_post(&$a) {
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if($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.
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$public_key = $_POST['public_key'];
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$dfrn_id = $_POST['dfrn_id'];
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$source_url = $_POST['source_url'];
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$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));
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if(! count($r)) {
$message = t('No user record found for ') . '\'' . $node . '\'';
xml_status(3,$message); // failure
// NOTREACHED
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}
$my_prvkey = $r[0]['prvkey'];
$local_uid = $r[0]['uid'];
// verify everything
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$decrypted_source_url = "";
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openssl_private_decrypt($source_url,$decrypted_source_url,$my_prvkey);
if(! strlen($decrypted_source_url)) {
$message = t('empty site URL was provided.');
xml_status(3,$message);
// NOTREACHED
}
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$ret = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
dbesc($decrypted_source_url),
intval($local_uid)
);
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if(! count($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);
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return; // NOTREACHED
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}
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$relation = $ret[0]['rel'];
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// Decrypt all this stuff we just received
$foreign_pubkey = $ret[0]['site-pubkey'];
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$dfrn_record = $ret[0]['id'];
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$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),
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intval($local_uid)
);
if(count($r)) {
$message = t('The ID provided is a duplicate on our system. Please try again.');
xml_status(1,$message); // Birthday paradox - duplicate dfrn-id
// NOTREACHED
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}
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$r = q("UPDATE `contact` SET `dfrn-id` = '%s', `pubkey` = '%s' WHERE `id` = %d LIMIT 1",
dbesc($decrypted_dfrn_id),
dbesc($dfrn_pubkey),
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intval($dfrn_record)
);
if(! count($r)) {
$message = t('Unable to set your credentials on our system.');
xml_status(3,$message);
}
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// We're good but now we have to scrape the profile photo and send notifications.
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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",
intval($dfrn_record));
if(count($r)) {
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$filename = basename($r[0]['photo']);
$img_str = fetch_url($r[0]['photo'],true);
$img = new Photo($img_str);
if($img->is_valid()) {
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$img->scaleImageSquare(175);
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$hash = photo_new_resource();
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$r = $img->store($local_uid, $dfrn_record, $hash, $filename, t('Contact Photos') , 4);
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if($r === false)
$photo_failure = true;
$img->scaleImage(80);
$r = $img->store($local_uid, $dfrn_record, $hash, $filename, t('Contact Photos') , 5);
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if($r === false)
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$photo_failure = true;
$photo = $a->get_baseurl() . '/photo/' . $hash . '-4.jpg';
$thumb = $a->get_baseurl() . '/photo/' . $hash . '-5.jpg';
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}
else
$photo_failure = true;
}
else
$photo_failure = true;
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if($photo_failure) {
$photo = $a->get_baseurl() . '/images/default-profile.jpg';
$thumb = $a->get_baseurl() . '/images/default-profile-sm.jpg';
}
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$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
$message = t('Unable to update your contact profile on our system');
xml_status(3,$message);
}
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// Otherwise everything seems to have worked and we are almost done. Yay!
// Send an email notification
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$r = q("SELECT * FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid`
WHERE `contact`.`id` = %d LIMIT 1",
intval($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 );
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}
}
xml_status(0); // Success
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return; // NOTREACHED
////////////////////// End of this scenario ///////////////////////////////////////////////
}
else {
// We are processing a local confirmation initiated on this system by our user to an external introduction.
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$uid = get_uid();
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if(! $uid) {
notice( t('Permission denied.') . EOL );
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return;
}
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$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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$r = q("SELECT * FROM `contact` WHERE `issued-id` = '%s' AND `uid` = %d LIMIT 1",
dbesc($dfrn_id),
intval($uid)
);
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if(! count($r)) {
notice( t('Node does not exist.') . EOL );
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return;
}
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$contact_id = $r[0]['id'];
$relation = $r[0]['rel'];
$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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'digest_alg' => 'whirlpool',
'private_key_bits' => 4096,
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'encrypt_key' => false )
);
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$private_key = '';
openssl_pkey_export($res, $private_key);
$pubkey = openssl_pkey_get_details($res);
$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($private_key),
intval($contact_id),
intval($uid)
);
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$params = array();
$src_aes_key = random_string();
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$result = '';
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openssl_private_encrypt($dfrn_id,$result,$a->user['prvkey']);
$params['dfrn_id'] = $result;
$params['public_key'] = $public_key;
$my_url = $a->get_baseurl() . '/profile/' . $a->user['nickname'];
openssl_public_encrypt($my_url, $params['source_url'], $site_pubkey);
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if($aes_allow && function_exists('openssl_encrypt')) {
openssl_public_encrypt($src_aes_key, $params['aes_key'], $site_pubkey);
$params['public_key'] = openssl_encrypt($public_key,'AES-256-CBC',$src_aes_key);
}
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$params['dfrn_version'] = '2.0';
if($duplex == 1)
$params['duplex'] = 1;
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$res = post_url($dfrn_confirm,$params);
// Try to be robust if the remote site is having difficulty and throwing up
// errors of some kind.
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$leading_junk = substr($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 . $leading_junk . EOL );
}
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$xml = simplexml_load_string($res);
$status = (int) $xml->status;
$message = unxmlify($xml->message);
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switch($status) {
case 0:
notice( t("Confirmation completed successfully.") . EOL);
if(strlen($message))
notice( t('Remote site reported: ') . $message . EOL);
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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: ') . $message . EOL);
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break;
case 3:
notice( t("Introduction failed or was revoked.") . EOL);
if(strlen($message))
notice( t('Remote site reported: ') . $message . EOL);
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break;
}
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if(($status == 0) && ($intro_id)) {
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//delete the notification
$r = q("DELETE FROM `intro` WHERE `id` = %d AND `uid` = %d LIMIT 1",
intval($intro_id),
intval($uid)
);
}
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if($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($img->is_valid()) {
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$img->scaleImageSquare(175);
$hash = photo_new_resource();
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$r = $img->store($uid, $contact_id, $hash, $filename, t('Contact Photos'), 4 );
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if($r === false)
$photo_failure = true;
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$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)
$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))
$new_relation = REL_BUD;
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$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,
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`network` = 'dfrn' WHERE `id` = %d LIMIT 1
",
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dbesc($photo),
dbesc($thumb),
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intval($new_relation),
dbesc(datetime_convert()),
dbesc(datetime_convert()),
dbesc(datetime_convert()),
intval($duplex),
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intval($contact_id)
);
if($r === false)
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notice( t('Unable to set contact photo.') . EOL);
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goaway($a->get_baseurl() . '/contacts/' . intval($contact_id));
return; //NOTREACHED
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}
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return;
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}