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Misc fixes, readme, comments

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This commit is contained in:
Chris
2024-03-10 16:23:46 +01:00
parent 813150c92b
commit 83c34f4a47
6 changed files with 124 additions and 51 deletions
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1
src/Http/Exception/SecurityException.php
View File

@@ -7,4 +7,5 @@ use Exception;
class SecurityException extends Exception
{
const ERR_ACCESS_DENIED = 50001;
const ERR_NO_PERMISSION = 50002;
}

55
src/Http/Server.php
View File

@@ -80,6 +80,7 @@ class Server
*/
private function createHttpServer(array $options): HttpServer
{
// TODO break out the middleware to facilitate testing
return new HttpServer(
$this->rejectionWrappingMiddleware(...),
$this->checkRequestSecurityMiddleware(...),
@@ -91,7 +92,7 @@ class Server
}
/**
*
* Resolves unhandled requests with a 404 error
*
* @param ServerRequestInterface $request
* @return PromiseInterface
@@ -106,7 +107,8 @@ class Server
}
/**
*
* Wraps rejections into error messages, and also does some sanity checks on the returned
* data, making sure it is a response.
*
* @param ServerRequestInterface $request
* @param callable $next
@@ -275,6 +277,22 @@ class Server
throw new \Exception("Invalid request");
}
// Parse out the urlencoded body. Pretty sure there is a better way to do this?
$body = explode("&", (string)$request->getBody());
$data = [];
foreach ($body as $param) {
if (!str_contains($param, "="))
throw new RequestException("Invalid request data", RequestException::ERR_INVALID_REQUEST_DATA);
[ $name, $value ] = array_map('urldecode', explode("=", $param, 2));
if (in_array($name, [ 'topic' ])) {
if (!isset($data[$name]))
$data[$name] = [];
$data[$name][] = $value;
} else {
$data[$name] = $value;
}
}
// Grab the JWT token from the requests authorization attribute
$tok = $request->getAttribute('authorization');
if ($tok instanceof JWTToken) {
@@ -282,22 +300,9 @@ class Server
if (isset($claims['mercure']['publish'])) {
$publishClaims = $claims['mercure']['publish'];
// TODO check topic against publishClaims
}
}
// Parse out the urlencoded body. Pretty sure there is a better way to do this?
$body = explode("&", (string)$request->getBody());
$data = [];
foreach ($body as $param) {
if (!str_contains($param, "=")) throw new RequestException("Invalid request data", RequestException::ERR_INVALID_REQUEST_DATA);
[ $name, $value ] = array_map('urldecode', explode("=", $param, 2));
// FIXME support multiple topics?
if (in_array($name, [ 'topic' ])) {
if (!isset($data[$name]))
$data[$name] = [];
$data[$name][] = $value;
} else {
$data[$name] = $value;
if (!$this->checkTopicClaims($data['topic']??[], $publishClaims)) {
throw new SecurityException("Insufficient permissions for publish", SecurityException::ERR_NO_PERMISSION);
}
}
}
@@ -316,6 +321,18 @@ class Server
return Response::plaintext("urn:uuid:".$message->id."\n");
}
private function checkTopicClaims(string|array $topic, array $claims): bool
{
foreach ((array)$topic as $match) {
foreach ($claims as $claim) {
if ($claim === "*") return true;
if ($claim === $match) return true;
// TODO implement full matching
}
}
return false;
}
/**
*
*
@@ -327,7 +344,7 @@ class Server
foreach ($this->webSocketClients as $webSocket) {
$webSocket->write(json_encode([
'type' => $message->type,
//'topic' => $data['topic'],
'topic' => $message->topic,
'data' => (@json_decode($message->data))??$message->data
]));
}