*/
namespace Friendica\Util;
-use Friendica\BaseObject;
use Friendica\Core\Config;
-use Friendica\Database\DBA;
+use Friendica\Core\Logger;
use Friendica\Model\User;
use Friendica\Model\APContact;
-use Friendica\Protocol\ActivityPub;
/**
* @brief Implements HTTP Signatures per draft-cavage-http-signatures-07.
* @param $key
*
* @return array with verification data
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function verifyMagic($key)
{
$sig_block = self::parseSigheader($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)
{
/**
* @brief Transmit given data to a target for a user
*
- * @param $data
- * @param $target
- * @param $uid
+ * @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)
{
$path = parse_url($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';
$postResult = Network::post($target, $content, $headers);
+ $return_code = $postResult->getReturnCode();
+
+ Logger::log('Transmit to ' . $target . ' returned ' . $return_code, Logger::DEBUG);
- logger('Transmit to ' . $target . ' returned ' . $postResult->getReturnCode());
+ return ($return_code >= 200) && ($return_code <= 299);
+ }
+
+ /**
+ * @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)
+ {
+ $opts = ['accept_content' => 'application/activity+json, application/ld+json'];
+ $curlResult = self::fetchRaw($request, $uid, false, $opts);
+
+ if (empty($curlResult)) {
+ return false;
+ }
+
+ 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 Fetches raw data for a user
+ *
+ * @param string $request request url
+ * @param integer $uid User id of the requester
+ * @param boolean $binary TRUE if asked to return binary results (file download) (default is "false")
+ * @param array $opts (optional parameters) assoziative array with:
+ * 'accept_content' => supply Accept: header with 'accept_content' as the value
+ * 'timeout' => int Timeout in seconds, default system config value or 60 seconds
+ * 'http_auth' => username:password
+ * 'novalidate' => do not validate SSL certs, default is to validate using our CA list
+ * 'nobody' => only return the header
+ * 'cookiejar' => path to cookie jar file
+ *
+ * @return object CurlResult
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ */
+ public static function fetchRaw($request, $uid = 0, $binary = false, $opts = [])
+ {
+ if (!empty($uid)) {
+ $owner = User::getOwnerDataById($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 . '"';
+ } else {
+ $headers = [];
+ }
+
+ if (!empty($opts['accept_content'])) {
+ $headers[] = 'Accept: ' . $opts['accept_content'];
+ }
+
+ $curl_opts = $opts;
+ $curl_opts['header'] = $headers;
+
+ $curlResult = Network::curl($request, false, $redirects, $curl_opts);
+ $return_code = $curlResult->getReturnCode();
+
+ Logger::log('Fetched for user ' . $uid . ' from ' . $request . ' returned ' . $return_code, Logger::DEBUG);
+
+ return $curlResult;
}
/**
* @param $content
* @param $http_headers
*
- * @return signer string
+ * @return string Signer
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function getSigner($content, $http_headers)
{
- $object = json_decode($content, true);
-
- if (empty($object)) {
+ if (empty($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;
}
+ $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') {
$hashalg = 'sha256';
if (!empty($hashalg) && base64_encode(hash($hashalg, $content, true)) != $digest[1]) {
return false;
}
+
+ $hasGoodSignedContent = true;
+ }
+
+ // Check if the signed date field is in an acceptable range
+ 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;
+ }
+ $hasGoodSignedContent = true;
}
// Check the content-length when it is part of the signed data
}
}
+ // Ensure that the authentication had been done with some content
+ // Without this check someone could authenticate with fakeable data
+ if (!$hasGoodSignedContent) {
+ return false;
+ }
+
return $key['url'];
}
* @param $actor
*
* @return array with actor url and public key
+ * @throws \Exception
*/
private static function fetchKey($id, $actor)
{
$profile = APContact::getByURL($url);
if (!empty($profile)) {
- logger('Taking key from id ' . $id, LOGGER_DEBUG);
+ Logger::log('Taking key from id ' . $id, Logger::DEBUG);
return ['url' => $url, 'pubkey' => $profile['pubkey']];
} elseif ($url != $actor) {
$profile = APContact::getByURL($actor);
if (!empty($profile)) {
- logger('Taking key from actor ' . $actor, LOGGER_DEBUG);
+ Logger::log('Taking key from actor ' . $actor, Logger::DEBUG);
return ['url' => $actor, 'pubkey' => $profile['pubkey']];
}
}
projects / friendica.git / blobdiff