Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
if(! function_exists('dfrn_request_init')) {
function dfrn_request_init(&$a) {
if($_SESSION['authenticated']) {
// choose which page to show (could be remote auth)
}
if($a->argc > 1)
$which = $a->argv[1];
require_once('mod/profile.php');
profile_init($a,$which);
return;
}}
if(! function_exists('dfrn_request_post')) {
function dfrn_request_post(&$a) {
if(($a->argc != 2) || (! count($a->profile)))
return;
if($_POST['cancel']) {
goaway($a->get_baseurl());
}
// callback to local site after remote request and local confirm
if((x($_POST,'localconfirm')) && ($_POST['localconfirm'] == 1)
&& local_user() && ($_SESSION['uid'] == $a->argv[1]) && (x($_POST,'dfrn_url'))) {
// We are the requestor, and we've been sent back to our own site
// to confirm the request. We've done so and clicked submit,
// which brings us here.
$dfrn_url = notags(trim($_POST['dfrn_url']));
$aes_allow = (((x($_POST,'aes_allow')) && ($_POST['aes_allow'] == 1)) ? 1 : 0);
$confirm_key = ((x($_POST,'confirm_key')) ? $_POST['confirm_key'] : "");
$contact_record = null;
if(x($dfrn_url)) {
$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `dfrn-url` = '%s' LIMIT 1",
intval($_SESSION['uid']),
dbesc($dfrn_url)
);
if(count($r)) {
if(strlen($r[0]['dfrn-id'])) {
notice("This introduction has already been accepted." . EOL );
return;
}
else
$contact_record = $r[0];
}
if(is_array($contact_record)) {
$r = q("UPDATE `contact` SET `ret-aes` = %d WHERE `id` = %d LIMIT 1",
intval($aes_allow),
intval($contact_record['id'])
);
}
else {
require_once('Scrape.php');
$parms = scrape_dfrn($dfrn_url);
if(! count($parms)) {
notice( 'URL is not valid or does not contain profile information.' . EOL );
return;
}
else {
if(! x($parms,'fn'))
notice( 'Warning: DFRN profile has no identifiable owner name.' . EOL );
if(! x($parms,'photo'))
notice( 'Warning: DFRN profile has no profile photo.' . EOL );
$invalid = validate_dfrn($parms);
if($invalid) {
notice( $invalid . ' required DFRN parameter'
. (($invalid == 1) ? " was " : "s were " )
. "not found at the given URL" . EOL );
return;
}
}
$dfrn_request = $parms['dfrn-request'];
dbesc_array($parms);
$r = q("INSERT INTO `contact` ( `uid`, `created`,`url`, `name`, `photo`, `site-pubkey`,
`request`, `confirm`, `notify`, `poll`, `aes_allow`)
VALUES ( %d, '%s', '%s', '%s' , '%s', '%s', '%s', '%s', '%s', '%s', %d)",
intval($_SESSION['uid']),
datetime_convert(),
dbesc($dfrn_url),
$parms['fn'],
$parms['photo'],
$parms['key'],
$parms['dfrn-request'],
$parms['dfrn-confirm'],
$parms['dfrn-notify'],
$parms['dfrn-poll'],
intval($aes_allow)
);
}
if($r) {
notice( "Introduction complete." . EOL);
}
// Allow the blocked remote notification to complete
if(is_array($contact_record))
$dfrn_request = $contact_record['request'];
if(strlen($dfrn_request) && strlen($confirm_key))
$s = fetch_url($dfrn_request . '?confirm_key=' . $confirm_key);
// ignore reply
goaway($dfrn_url);
// NOTREACHED
}
// invalid DFRN-url
notice( "Unrecoverable protocol error." . EOL );
goaway($a->get_baseurl());
}
// we are operating as a remote site and an introduction was requested of us.
// Scrape the originating DFRN-URL for everything we need. Create a contact record
// and an introduction to show our user next time he/she logs in.
// Finally redirect back to the originator so that their site can record the request.
// If our user confirms the request, a record of it will need to exist on the
// originator's site in order for the confirmation process to complete..
if($a->profile['nickname'])
$tailname = $a->profile['nickname'];
else
$tailname = $a->profile['uid'];
$uid = $a->profile['uid'];
$contact_record = null;
$failed = false;
$parms = null;
if( x($_POST,'dfrn_url')) {
$url = trim($_POST['dfrn_url']);
if(! strlen($url)) {
notice( "Invalid URL" . EOL );
return;
}
if(strstr($url,'@')) {
$username = substr($url,0,strpos($url,'@'));
$hostname = substr($url,strpos($url,'@') + 1);
require_once('Scrape.php');
$parms = scrape_meta('http://' . $url);
if((x($parms,'dfrn-template')) && strstr($parms['dfrn-template'],'%s'))
$url = sprintf($parms['dfrn-template'],$username);
}
$ret = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' LIMIT 1",
intval($uid),
dbesc($url)
);
if(count($ret)) {
if(strlen($ret[0]['issued-id'])) {
notice( 'You have already introduced yourself here.' . EOL );
return;
}
else {
$contact_record = $ret[0];
$parms = array('dfrn-request' => $ret[0]['request']);
}
}
$issued_id = random_string();
if(is_array($contact_record)) {
// There is a contact record but no issued-id, so this
// is a reciprocal introduction from a known contact
$r = q("UPDATE `contact` SET `issued-id` = '%s' WHERE `id` = %d LIMIT 1",
dbesc($issued_id),
intval($contact_record['id'])
);
}
else {
require_once('Scrape.php');
$parms = scrape_dfrn($url);
if(! count($parms)) {
notice( 'URL is not valid or does not contain profile information.' . EOL );
killme();
}
else {
if(! x($parms,'fn'))
notice( 'Warning: DFRN profile has no identifiable owner name.' . EOL );
if(! x($parms,'photo'))
notice( 'Warning: DFRN profile has no profile photo.' . EOL );
$invalid = validate_dfrn($parms);
if($invalid) {
notice( $invalid . ' required DFRN parameter'
. (($invalid == 1) ? " was " : "s were " )
. "not found at the given URL" . EOL) ;
return;
}
}
$parms['url'] = $url;
$parms['issued-id'] = $issued_id;
dbesc_array($parms);
$r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `name`, `issued-id`, `photo`, `site-pubkey`,
`request`, `confirm`, `notify`, `poll` )
VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' )",
intval($uid),
datetime_convert(),
$parms['url'],
$parms['fn'],
$parms['issued-id'],
$parms['photo'],
$parms['key'],
$parms['dfrn-request'],
$parms['dfrn-confirm'],
$parms['dfrn-notify'],
$parms['dfrn-poll']
);
// find the contact record we just created
if($r) {
$r = q("SELECT `id` FROM `contact`
WHERE `uid` = '%s' AND `url` = '%s' AND `issued-id` = '%s' LIMIT 1",
intval($uid),
$parms['url'],
$parms['issued-id']
);
if(count($r))
$contact_record = $r[0];
}
}
if($r === false) {
notice( 'Failed to update contact record.' . EOL );
return;
}
$hash = random_string() . (string) time(); // Generate a confirm_key
if(is_array($contact_record)) {
$ret = q("INSERT INTO `intro` ( `uid`, `contact-id`, `blocked`, `knowyou`, `note`, `hash`, `datetime`)
VALUES ( %d, %d, 1, %d, '%s', '%s', '%s' )",
intval($uid),
intval($contact_record['id']),
((x($_POST,'knowyou') && ($_POST['knowyou'] == 1)) ? 1 : 0),
dbesc(trim($_POST['dfrn-request-message'])),
dbesc($hash),
dbesc(datetime_convert())
);
}
// TODO: send an email notification if our user wants one
if(! $failed)
notice( "Your introduction has been sent." . EOL );
// "Homecoming" - send the requestor back to their site to record the introduction.
$dfrn_url = bin2hex($a->get_baseurl() . "/profile/$tailname");
$aes_allow = ((function_exists('openssl_encrypt')) ? 1 : 0);
goaway($parms['dfrn-request'] . "?dfrn_url=$dfrn_url" . '&confirm_key=' . $hash . (($aes_allow) ? "&aes_allow=1" : ""));
// NOTREACHED
}
return;
}}
if(! function_exists('dfrn_request_content')) {
function dfrn_request_content(&$a) {
if(($a->argc != 2) || (! count($a->profile)))
return "";
$a->page['template'] = 'profile';
// "Homecoming". Make sure we're logged in to this site as the correct user. Then offer a confirm button
// to send us to the post section to record the introduction.
if(x($_GET,'dfrn_url')) {
if(! local_user()) {
notice( "Please login to confirm introduction." . EOL );
return login();
}
// Edge case, but can easily happen in the wild. This person is authenticated,
// but not as the person who needs to deal with this request.
if (($_SESSION['uid'] != $a->argv[1]) && ($a->user['nickname'] != $a->argv[1])) {
notice( "Incorrect identity currently logged in. Please login to <strong>this</strong> profile." . EOL);
return login();
}
$dfrn_url = notags(trim(pack("H*" , $_GET['dfrn_url'])));
$aes_allow = (((x($_GET,'aes_allow')) && ($_GET['aes_allow'] == 1)) ? 1 : 0);
$confirm_key = (x($_GET,'confirm_key') ? $_GET['confirm_key'] : "");
$o .= file_get_contents("view/dfrn_req_confirm.tpl");
$o = replace_macros($o,array(
'$dfrn_url' => $dfrn_url,
'$aes_allow' => (($aes_allow) ? '<input type="hidden" name="aes_allow" value="1" />' : "" ),
'$confirm_key' => $confirm_key,
'$username' => $a->user['username'],
'$uid' => $_SESSION['uid'],
'dfrn_rawurl' => $_GET['dfrn_url']
));
return $o;
}
else {
// we are the requestee and it is now safe to send our user their introduction
if((x($_GET,'confirm_key')) && strlen($_GET['confirm_key'])) {
$r = q("UPDATE `intro` SET `blocked` = 0 WHERE `hash` = '%s' LIMIT 1",
dbesc($_GET['confirm_key'])
);
killme();
}
// Outside request. Display our user's introduction form.
$o = file_get_contents("view/dfrn_request.tpl");
$o = replace_macros($o,array('$uid' => $a->profile['uid']));
return $o;
}
}}