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Merge pull request #6908 from annando/sig-auth 

Enable remote authentication with HTTP Signatures
This commit is contained in:
Hypolite Petovan 2019-03-19 08:28:13 -04:00 committed by GitHub
parent 326a7d22ba dbfb0b6cff
commit d0c0f0345c
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 66 additions and 26 deletions
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9
src/App.php
View File

@ -12,7 +12,9 @@ use Friendica\Core\Config\Cache\ConfigCacheLoader;
use Friendica\Core\Config\Cache\IConfigCache;
use Friendica\Core\Config\Configuration;
use Friendica\Database\DBA;
use Friendica\Model\Profile;
use Friendica\Network\HTTPException\InternalServerErrorException;
use Friendica\Util\HTTPSignature;
use Friendica\Util\Profiler;
use Psr\Log\LoggerInterface;
@ -1143,6 +1145,13 @@ class App
Core\Worker::executeIfIdle();
}
if ($this->getMode()->isNormal()) {
$requester = HTTPSignature::getSigner('', $_SERVER);
if (!empty($requester)) {
Profile::addVisitorCookieForHandle($requester);
}
}
// ZRL
if (!empty($_GET['zrl']) && $this->getMode()->isNormal()) {
$this->query_string = Model\Profile::stripZrls($this->query_string);

71
src/Model/Profile.php
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@ -1082,6 +1082,51 @@ class Profile
}
}
/**
* Set the visitor cookies (see remote_user()) for the given handle
*
* @param string $handle Visitor handle
* @return array Visitor contact array
*/
public static function addVisitorCookieForHandle($handle)
{
$a = \get_app();
// Try to find the public contact entry of the visitor.
$cid = Contact::getIdForURL($handle);
if (!$cid) {
Logger::log('unable to finger ' . $handle, Logger::DEBUG);
return [];
}
$visitor = DBA::selectFirst('contact', [], ['id' => $cid]);
// Authenticate the visitor.
$_SESSION['authenticated'] = 1;
$_SESSION['visitor_id'] = $visitor['id'];
$_SESSION['visitor_handle'] = $visitor['addr'];
$_SESSION['visitor_home'] = $visitor['url'];
$_SESSION['my_url'] = $visitor['url'];
/// @todo replace this and the query for this variable with some cleaner functionality
$_SESSION['remote'] = [];
$remote_contacts = DBA::select('contact', ['id', 'uid'], ['nurl' => $visitor['nurl'], 'rel' => [Contact::FOLLOWER, Contact::FRIEND]]);
while ($contact = DBA::fetch($remote_contacts)) {
if (($contact['uid'] == 0) || Contact::isBlockedByUser($visitor['id'], $contact['uid'])) {
continue;
}
$_SESSION['remote'][] = ['cid' => $contact['id'], 'uid' => $contact['uid'], 'url' => $visitor['url']];
}
$a->contact = $visitor;
Logger::info('Authenticated visitor', ['url' => $visitor['url']]);
return $visitor;
}
/**
* OpenWebAuth authentication.
*
@ -1106,33 +1151,11 @@ class Profile
return;
}
// Try to find the public contact entry of the visitor.
$cid = Contact::getIdForURL($visitor_handle);
if(!$cid) {
Logger::log('owt: unable to finger ' . $visitor_handle, Logger::DEBUG);
$visitor = self::addVisitorCookieForHandle($visitor_handle);
if (empty($visitor)) {
return;
}
$visitor = DBA::selectFirst('contact', [], ['id' => $cid]);
// Authenticate the visitor.
$_SESSION['authenticated'] = 1;
$_SESSION['visitor_id'] = $visitor['id'];
$_SESSION['visitor_handle'] = $visitor['addr'];
$_SESSION['visitor_home'] = $visitor['url'];
$_SESSION['my_url'] = $visitor['url'];
/// @todo replace this and the query for this variable with some cleaner functionality
$_SESSION['remote'] = [];
$remote_contacts = DBA::select('contact', ['id', 'uid'], ['nurl' => $visitor['nurl'], 'rel' => [Contact::FOLLOWER, Contact::FRIEND]]);
while ($contact = DBA::fetch($remote_contacts)) {
if (($contact['uid'] == 0) || Contact::isBlockedByUser($visitor['id'], $contact['uid'])) {
continue;
}
$_SESSION['remote'][] = ['cid' => $contact['id'], 'uid' => $contact['uid'], 'url' => $visitor['url']];
}
$arr = [
'visitor' => $visitor,
'url' => $a->query_string

3
src/Module/Photo.php
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@ -45,9 +45,6 @@ class Photo extends BaseModule
exit;
}
/// @todo Add Authentication to enable fetching of non public content
// $requester = HTTPSignature::getSigner('', $_SERVER);
$customsize = 0;
$photo = false;
switch($a->argc) {

13
src/Util/HTTPSignature.php
View File

@ -488,8 +488,10 @@ class HTTPSignature
return false;
}
$hasGoodSignedContent = false;
// Check the digest when it is part of the signed data
if (in_array('digest', $sig_block['headers'])) {
if (!empty($content) && in_array('digest', $sig_block['headers'])) {
$digest = explode('=', $headers['digest'], 2);
if ($digest[0] === 'SHA-256') {
$hashalg = 'sha256';
@ -503,6 +505,8 @@ class HTTPSignature
if (!empty($hashalg) && base64_encode(hash($hashalg, $content, true)) != $digest[1]) {
return false;
}
$hasGoodSignedContent = true;
}
// Check if the signed date field is in an acceptable range
@ -512,6 +516,7 @@ class HTTPSignature
Logger::log("Header date '" . $headers['date'] . "' is with " . $diff . " seconds out of the 300 second frame. The signature is invalid.");
return false;
}
$hasGoodSignedContent = true;
}
// Check the content-length when it is part of the signed data
@ -521,6 +526,12 @@ class HTTPSignature
}
}
// Ensure that the authentication had been done with some content
// Without this check someone could authenticate with fakeable data
if (!$hasGoodSignedContent) {
return false;
}
return $key['url'];
}