1 files changed, 91 insertions, 0 deletions
diff --git a/server/lib/Validator/Website.php b/server/lib/Validator/Website.php
new file mode 100644
index 0000000..e43bfb0
--- /dev/null
+++ b/server/lib/Validator/Website.php
@@ -0,0 +1,91 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Bjoern Schiessle <bjoern@schiessle.org>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+namespace LookupServer\Validator;
+
+
+use LookupServer\SignatureHandler;
+
+class Website {
+
+	/** @var  SignatureHandler */
+	private $signatureHandler;
+
+	public function __construct(SignatureHandler $signatureHandler) {
+		$this->signatureHandler = $signatureHandler;
+	}
+
+	/**
+	 * verify website proof
+	 *
+	 * @param array $verificationData from toVerify table
+	 * @param array $userData stored user data
+	 * @return bool
+	 */
+	public function verify($verificationData, $userData) {
+		$url = $this->getValidUrl($verificationData['location']);
+		$proof = @file_get_contents($url);
+		$result = false;
+		try {
+			if ($proof) {
+				$cloudId = $userData['federationId'];
+				$proofSanitized = trim(preg_replace('/\s\s+/', ' ', $proof));
+				list($message, $signature) = $this->splitMessageSignature($proofSanitized);
+				$result = $this->signatureHandler->verify($cloudId, $message, $signature);
+			}
+		} catch (\Exception $e) {
+			// do nothing, just return false
+		}
+
+		return $result;
+	}
+
+	/**
+	 * construct valid URL to proof
+	 *
+	 * @param string $url
+	 * @return string
+	 */
+	private function getValidUrl($url) {
+		$url = trim($url);
+		$url = rtrim($url, '/');
+		if (strpos($url, 'http://') !== 0 && strpos($url, 'https://') !== 0) {
+			$url = 'http://' . $url;
+		}
+
+		return $url . '/.well-known/CloudIdVerificationCode.txt';
+	}
+
+	/**
+	 * split message and signature
+	 *
+	 * @param string $proof
+	 * @return array
+	 */
+	private function splitMessageSignature($proof) {
+		$signature = substr($proof, -344);
+		$message = substr($proof, 0, -344);
+
+		return [trim($message), trim($signature)];
+	}
+
+}