From 9f0bbd96be8b4b4995cc81ae7700e38ccb2cfadd Mon Sep 17 00:00:00 2001
From: Philipp Holzer <admin@philipp.info>
Date: Sun, 5 May 2019 19:02:19 +0200
Subject: [PATCH] Move mod/modexp to src/Module/PublicRSAKey

---
 mod/modexp.php              | 36 ----------------------------
 src/App/Router.php          |  1 +
 src/Module/PublicRSAKey.php | 47 +++++++++++++++++++++++++++++++++++++
 3 files changed, 48 insertions(+), 36 deletions(-)
 delete mode 100644 mod/modexp.php
 create mode 100644 src/Module/PublicRSAKey.php

diff --git a/mod/modexp.php b/mod/modexp.php
deleted file mode 100644
index cae91c4648..0000000000
--- a/mod/modexp.php
+++ /dev/null
@@ -1,36 +0,0 @@
-<?php
-
-use Friendica\App;
-use Friendica\Database\DBA;
-
-function modexp_init(App $a) {
-
-	if($a->argc != 2)
-		exit();
-
-	$nick = $a->argv[1];
-	$r = q("SELECT `spubkey` FROM `user` WHERE `nickname` = '%s' LIMIT 1",
-			DBA::escape($nick)
-	);
-
-	if (! DBA::isResult($r)) {
-		exit();
-	}
-
-	$lines = explode("\n",$r[0]['spubkey']);
-	unset($lines[0]);
-	unset($lines[count($lines)]);
-	$x = base64_decode(implode('',$lines));
-
-	$r = ASN_BASE::parseASNString($x);
-
-	$m = $r[0]->asnData[1]->asnData[0]->asnData[0]->asnData;
-	$e = $r[0]->asnData[1]->asnData[0]->asnData[1]->asnData;
-
-	header("Content-type: application/magic-public-key");
-	echo 'RSA' . '.' . $m . '.' . $e;
-
-	exit();
-
-}
-
diff --git a/src/App/Router.php b/src/App/Router.php
index 1dffb6b406..8826245451 100644
--- a/src/App/Router.php
+++ b/src/App/Router.php
@@ -139,6 +139,7 @@ class Router
 		$this->routeCollector->addRoute(['GET', 'POST'], '/logout',              Module\Logout::class);
 		$this->routeCollector->addRoute(['GET'],         '/magic',               Module\Magic::class);
 		$this->routeCollector->addRoute(['GET'],         '/manifest',            Module\Manifest::class);
+		$this->routeCollector->addRoute(['GET'],         '/modexp/{nick}',       Module\PublicRSAKey::class);
 		$this->routeCollector->addRoute(['GET'],         '/nodeinfo/1.0',        Module\NodeInfo::class);
 		$this->routeCollector->addRoute(['GET'],         '/nogroup',             Module\Group::class);
 		$this->routeCollector->addRoute(['GET'],         '/objects/{guid}',      Module\Objects::class);
diff --git a/src/Module/PublicRSAKey.php b/src/Module/PublicRSAKey.php
new file mode 100644
index 0000000000..ed099616ad
--- /dev/null
+++ b/src/Module/PublicRSAKey.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace Friendica\Module;
+
+use ASN_BASE;
+use Friendica\BaseModule;
+use Friendica\Model\User;
+use Friendica\Network\HTTPException\BadRequestException;
+
+/**
+ * prints the public RSA key of a user
+ */
+class PublicRSAKey extends BaseModule
+{
+	public static function rawContent()
+	{
+		$app = self::getApp();
+
+		// @TODO: Replace with parameter from router
+		if ($app->argc !== 2) {
+			throw new BadRequestException();
+		}
+
+		// @TODO: Replace with parameter from router
+		$nick = $app->argv[1];
+
+		$user = User::getByNickname($nick, ['spubkey']);
+		if (empty($user) || empty($user['spubkey'])) {
+			throw new BadRequestException();
+		}
+
+		$lines = explode("\n", $user['spubkey']);
+		unset($lines[0]);
+		unset($lines[count($lines)]);
+
+		$asnString = base64_decode(implode('', $lines));
+		$asnBase = ASN_BASE::parseASNString($asnString);
+
+		$m = $asnBase[0]->asnData[1]->asnData[0]->asnData[0]->asnData;
+		$e = $asnBase[0]->asnData[1]->asnData[0]->asnData[1]->asnData;
+
+		header('Content-type: application/magic-public-key');
+		echo 'RSA' . '.' . $m . '.' . $e;
+
+		exit();
+	}
+}