*/
namespace Friendica\Util;
-use Friendica\BaseObject;
use Friendica\Core\Config;
-use Friendica\Database\DBA;
+use Friendica\Core\Logger;
use Friendica\Model\User;
-use Friendica\Protocol\ActivityPub;
+use Friendica\Model\APContact;
/**
* @brief Implements HTTP Signatures per draft-cavage-http-signatures-07.
*
* Ported from Hubzilla: https://framagit.org/hubzilla/core/blob/master/Zotlabs/Web/HTTPSig.php
*
+ * Other parts of the code for HTTP signing are taken from the Osada project.
+ * https://framagit.org/macgirvin/osada
+ *
* @see https://tools.ietf.org/html/draft-cavage-http-signatures-07
*/
class HTTPSignature
{
// See draft-cavage-http-signatures-08
+ /**
+ * @brief Verifies a magic request
+ *
+ * @param $key
+ *
+ * @return array with verification data
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ */
public static function verifyMagic($key)
{
$headers = null;
$sig_block = self::parseSigheader($headers['authorization']);
if (!$sig_block) {
- logger('no signature provided.');
+ Logger::log('no signature provided.');
return $result;
}
$key = $key($sig_block['keyId']);
}
- logger('Got keyID ' . $sig_block['keyId']);
+ Logger::log('Got keyID ' . $sig_block['keyId'], Logger::DEBUG);
if (!$key) {
return $result;
$x = Crypto::rsaVerify($signed_data, $sig_block['signature'], $key, $algorithm);
- logger('verified: ' . $x, LOGGER_DEBUG);
+ Logger::log('verified: ' . $x, Logger::DEBUG);
if (!$x) {
return $result;
* - \e string \b algorithm
* - \e array \b headers
* - \e string \b signature
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function parseSigheader($header)
{
if (preg_match('/algorithm="(.*?)"/ism', $header, $matches)) {
$ret['algorithm'] = $matches[1];
+ } else {
+ $ret['algorithm'] = 'rsa-sha256';
}
if (preg_match('/headers="(.*?)"/ism', $header, $matches)) {
$ret['signature'] = base64_decode(preg_replace('/\s+/', '', $matches[1]));
}
- if (($ret['signature']) && ($ret['algorithm']) && (!$ret['headers'])) {
+ if (!empty($ret['signature']) && !empty($ret['algorithm']) && empty($ret['headers'])) {
$ret['headers'] = ['date'];
}
* - \e string \b key
* - \e string \b alg
* - \e string \b data
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
private static function decryptSigheader($header, $prvkey = null)
{
return '';
}
- /**
+ /*
* Functions for ActivityPub
*/
+ /**
+ * @brief Transmit given data to a target for a user
+ *
+ * @param array $data Data that is about to be send
+ * @param string $target The URL of the inbox
+ * @param integer $uid User id of the sender
+ *
+ * @return boolean Was the transmission successful?
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ */
public static function transmit($data, $target, $uid)
{
$owner = User::getOwnerDataById($uid);
return;
}
- $content = json_encode($data);
+ $content = json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
// Header data that is about to be signed.
$host = parse_url($target, PHP_URL_HOST);
$path = parse_url($target, PHP_URL_PATH);
$digest = 'SHA-256=' . base64_encode(hash('sha256', $content, true));
$content_length = strlen($content);
+ $date = DateTimeFormat::utcNow(DateTimeFormat::HTTP);
- $headers = ['Content-Length: ' . $content_length, 'Digest: ' . $digest, 'Host: ' . $host];
+ $headers = ['Date: ' . $date, 'Content-Length: ' . $content_length, 'Digest: ' . $digest, 'Host: ' . $host];
- $signed_data = "(request-target): post " . $path . "\ncontent-length: " . $content_length . "\ndigest: " . $digest . "\nhost: " . $host;
+ $signed_data = "(request-target): post " . $path . "\ndate: ". $date . "\ncontent-length: " . $content_length . "\ndigest: " . $digest . "\nhost: " . $host;
$signature = base64_encode(Crypto::rsaSign($signed_data, $owner['uprvkey'], 'sha256'));
- $headers[] = 'Signature: keyId="' . $owner['url'] . '#main-key' . '",algorithm="rsa-sha256",headers="(request-target) content-length digest host",signature="' . $signature . '"';
+ $headers[] = 'Signature: keyId="' . $owner['url'] . '#main-key' . '",algorithm="rsa-sha256",headers="(request-target) date content-length digest host",signature="' . $signature . '"';
$headers[] = 'Content-Type: application/activity+json';
- Network::post($target, $content, $headers);
- $return_code = BaseObject::getApp()->get_curl_code();
+ $postResult = Network::post($target, $content, $headers);
+ $return_code = $postResult->getReturnCode();
- logger('Transmit to ' . $target . ' returned ' . $return_code);
+ Logger::log('Transmit to ' . $target . ' returned ' . $return_code, Logger::DEBUG);
+
+ return ($return_code >= 200) && ($return_code <= 299);
}
- public static function verifyAP($content, $http_headers)
+ /**
+ * @brief Fetches JSON data for a user
+ *
+ * @param string $request request url
+ * @param integer $uid User id of the requester
+ *
+ * @return array JSON array
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ */
+ public static function fetch($request, $uid)
{
- $object = json_decode($content, true);
+ $owner = User::getOwnerDataById($uid);
+
+ if (!$owner) {
+ return;
+ }
+
+ // Header data that is about to be signed.
+ $host = parse_url($request, PHP_URL_HOST);
+ $path = parse_url($request, PHP_URL_PATH);
+ $date = DateTimeFormat::utcNow(DateTimeFormat::HTTP);
+
+ $headers = ['Date: ' . $date, 'Host: ' . $host];
+
+ $signed_data = "(request-target): get " . $path . "\ndate: ". $date . "\nhost: " . $host;
+
+ $signature = base64_encode(Crypto::rsaSign($signed_data, $owner['uprvkey'], 'sha256'));
+
+ $headers[] = 'Signature: keyId="' . $owner['url'] . '#main-key' . '",algorithm="rsa-sha256",headers="(request-target) date host",signature="' . $signature . '"';
+
+ $headers[] = 'Accept: application/activity+json, application/ld+json';
+
+ $curlResult = Network::curl($request, false, $redirects, ['header' => $headers]);
+ $return_code = $curlResult->getReturnCode();
- if (empty($object)) {
+ Logger::log('Fetched for user ' . $uid . ' from ' . $request . ' returned ' . $return_code, Logger::DEBUG);
+
+ if (!$curlResult->isSuccess() || empty($curlResult->getBody())) {
+ return false;
+ }
+
+ $content = json_decode($curlResult->getBody(), true);
+
+ if (empty($content) || !is_array($content)) {
+ return false;
+ }
+
+ return $content;
+ }
+
+ /**
+ * @brief Gets a signer from a given HTTP request
+ *
+ * @param $content
+ * @param $http_headers
+ *
+ * @return string Signer
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ */
+ public static function getSigner($content, $http_headers)
+ {
+ if (empty($http_headers['HTTP_SIGNATURE'])) {
return false;
}
- $actor = JsonLD::fetchElement($object, 'actor', 'id');
+ if (!empty($content)) {
+ $object = json_decode($content, true);
+ if (empty($object)) {
+ return false;
+ }
+
+ $actor = JsonLD::fetchElement($object, 'actor', 'id');
+ } else {
+ $actor = '';
+ }
$headers = [];
$headers['(request-target)'] = strtolower($http_headers['REQUEST_METHOD']) . ' ' . $http_headers['REQUEST_URI'];
return false;
}
- if (!Crypto::rsaVerify($signed_data, $sig_block['signature'], $key, $algorithm)) {
+ if (!Crypto::rsaVerify($signed_data, $sig_block['signature'], $key['pubkey'], $algorithm)) {
return false;
}
}
}
+ // Check if the signed date field is in an acceptable range
+ if (in_array('date', $sig_block['headers'])) {
+ $diff = abs(strtotime($headers['date']) - time());
+ if ($diff > 300) {
+ Logger::log("Header date '" . $headers['date'] . "' is with " . $diff . " seconds out of the 300 second frame. The signature is invalid.");
+ return false;
+ }
+ }
+
// Check the content-length when it is part of the signed data
if (in_array('content-length', $sig_block['headers'])) {
if (strlen($content) != $headers['content-length']) {
}
}
- return true;
-
+ return $key['url'];
}
+ /**
+ * @brief fetches a key for a given id and actor
+ *
+ * @param $id
+ * @param $actor
+ *
+ * @return array with actor url and public key
+ * @throws \Exception
+ */
private static function fetchKey($id, $actor)
{
$url = (strpos($id, '#') ? substr($id, 0, strpos($id, '#')) : $id);
- $profile = ActivityPub::fetchprofile($url);
+ $profile = APContact::getByURL($url);
if (!empty($profile)) {
- logger('Taking key from id ' . $id, LOGGER_DEBUG);
- return $profile['pubkey'];
+ Logger::log('Taking key from id ' . $id, Logger::DEBUG);
+ return ['url' => $url, 'pubkey' => $profile['pubkey']];
} elseif ($url != $actor) {
- $profile = ActivityPub::fetchprofile($actor);
+ $profile = APContact::getByURL($actor);
if (!empty($profile)) {
- logger('Taking key from actor ' . $actor, LOGGER_DEBUG);
- return $profile['pubkey'];
+ Logger::log('Taking key from actor ' . $actor, Logger::DEBUG);
+ return ['url' => $actor, 'pubkey' => $profile['pubkey']];
}
}