From 61af2e8006bbda5e889fa8f8cbb1612ae66402d6 Mon Sep 17 00:00:00 2001
From: Michael <heluecht@pirati.ca>
Date: Sun, 23 Jul 2023 20:05:10 +0000
Subject: [PATCH] Issue 13020: Fix OAuth connection with Buffer

---
 src/Module/OAuth/Authorize.php |  2 +-
 src/Module/OAuth/Token.php     |  6 ++++--
 src/Security/OAuth.php         | 12 +++++++++++-
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/src/Module/OAuth/Authorize.php b/src/Module/OAuth/Authorize.php
index efa066694..ea91de5a0 100644
--- a/src/Module/OAuth/Authorize.php
+++ b/src/Module/OAuth/Authorize.php
@@ -91,7 +91,7 @@ class Authorize extends BaseApi
 		}
 
 		if ($application['redirect_uri'] != 'urn:ietf:wg:oauth:2.0:oob') {
-			DI::app()->redirect($application['redirect_uri'] . (strpos($application['redirect_uri'], '?') ? '&' : '?') . http_build_query(['code' => $token['code'], 'state' => $request['state']]));
+			DI::app()->redirect($request['redirect_uri'] . (strpos($request['redirect_uri'], '?') ? '&' : '?') . http_build_query(['code' => $token['code'], 'state' => $request['state']]));
 		}
 
 		self::$oauth_code = $token['code'];
diff --git a/src/Module/OAuth/Token.php b/src/Module/OAuth/Token.php
index f97a05bb0..419fbd878 100644
--- a/src/Module/OAuth/Token.php
+++ b/src/Module/OAuth/Token.php
@@ -30,6 +30,7 @@ use Friendica\Module\BaseApi;
 use Friendica\Module\Special\HTTPException;
 use Friendica\Security\OAuth;
 use Friendica\Util\DateTimeFormat;
+use GuzzleHttp\Psr7\Uri;
 use Psr\Http\Message\ResponseInterface;
 
 /**
@@ -89,8 +90,9 @@ class Token extends BaseApi
 			$me = null;
 		} elseif ($request['grant_type'] == 'authorization_code') {
 			// For security reasons only allow freshly created tokens
-			$condition = ["`redirect_uri` = ? AND `id` = ? AND `code` = ? AND `created_at` > ?",
-				$request['redirect_uri'], $application['id'], $request['code'], DateTimeFormat::utc('now - 5 minutes')];
+			$uri = new Uri($request['redirect_uri']);
+			$condition = ["`redirect_uri` LIKE ? AND `id` = ? AND `code` = ? AND `created_at` > ?",
+				'%' . $uri->getScheme() . '://' . $uri->getHost() . $uri->getPath() . '%', $application['id'], $request['code'], DateTimeFormat::utc('now - 5 minutes')];
 
 			$token = DBA::selectFirst('application-view', ['access_token', 'created_at', 'uid'], $condition);
 			if (!DBA::isResult($token)) {
diff --git a/src/Security/OAuth.php b/src/Security/OAuth.php
index 2fc8724f7..f11927a53 100644
--- a/src/Security/OAuth.php
+++ b/src/Security/OAuth.php
@@ -29,6 +29,7 @@ use Friendica\Model\Contact;
 use Friendica\Model\User;
 use Friendica\Module\BaseApi;
 use Friendica\Util\DateTimeFormat;
+use GuzzleHttp\Psr7\Uri;
 
 /**
  * OAuth Server
@@ -128,8 +129,11 @@ class OAuth
 		if (!empty($client_secret)) {
 			$condition['client_secret'] = $client_secret;
 		}
+
 		if (!empty($redirect_uri)) {
-			$condition['redirect_uri'] = $redirect_uri;
+			$uri = new Uri($redirect_uri);
+			$redirect_uri = $uri->getScheme() . '://' . $uri->getHost() . $uri->getPath();
+			$condition = DBA::mergeConditions($condition, ["`redirect_uri` LIKE ?", '%' . $redirect_uri . '%']);
 		}
 
 		$application = DBA::selectFirst('application', [], $condition);
@@ -137,6 +141,12 @@ class OAuth
 			Logger::warning('Application not found', $condition);
 			return [];
 		}
+
+		// The redirect_uri could contain several URI that are separated by spaces.
+		if (($application['redirect_uri'] != $redirect_uri) && !in_array($redirect_uri, explode(' ', $application['redirect_uri']))) {
+			return [];
+		}
+		
 		return $application;
 	}