From aa4aaf1971c7aa83db529a83369b619123ae703c Mon Sep 17 00:00:00 2001
From: Michael <heluecht@pirati.ca>
Date: Mon, 14 Jan 2019 12:10:11 +0000
Subject: [PATCH] Enable communication with Peertube

---
 src/Protocol/ActivityPub/Transmitter.php | 8 ++++----
 src/Util/DateTimeFormat.php              | 1 +
 src/Util/HTTPSignature.php               | 8 +++++---
 3 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/src/Protocol/ActivityPub/Transmitter.php b/src/Protocol/ActivityPub/Transmitter.php
index 47478c3cf7..04631aa2fb 100644
--- a/src/Protocol/ActivityPub/Transmitter.php
+++ b/src/Protocol/ActivityPub/Transmitter.php
@@ -1156,7 +1156,7 @@ class Transmitter
 			'actor' => $owner['url'],
 			'object' => $profile['url'],
 			'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
-			'to' => $profile['url']];
+			'to' => [$profile['url']]];
 
 		Logger::log('Sending activity ' . $activity . ' to ' . $target . ' for user ' . $uid, Logger::DEBUG);
 
@@ -1184,7 +1184,7 @@ class Transmitter
 				'actor' => $profile['url'],
 				'object' => $owner['url']],
 			'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
-			'to' => $profile['url']];
+			'to' => [$profile['url']]];
 
 		Logger::log('Sending accept to ' . $target . ' for user ' . $uid . ' with id ' . $id, Logger::DEBUG);
 
@@ -1212,7 +1212,7 @@ class Transmitter
 				'actor' => $profile['url'],
 				'object' => $owner['url']],
 			'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
-			'to' => $profile['url']];
+			'to' => [$profile['url']]];
 
 		Logger::log('Sending reject to ' . $target . ' for user ' . $uid . ' with id ' . $id, Logger::DEBUG);
 
@@ -1247,7 +1247,7 @@ class Transmitter
 				'actor' => $owner['url'],
 				'object' => $profile['url']],
 			'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
-			'to' => $profile['url']];
+			'to' => [$profile['url']]];
 
 		Logger::log('Sending undo to ' . $target . ' for user ' . $uid . ' with id ' . $id, Logger::DEBUG);
 
diff --git a/src/Util/DateTimeFormat.php b/src/Util/DateTimeFormat.php
index 8545cd07c4..8eead1d2e5 100644
--- a/src/Util/DateTimeFormat.php
+++ b/src/Util/DateTimeFormat.php
@@ -18,6 +18,7 @@ class DateTimeFormat
 {
 	const ATOM = 'Y-m-d\TH:i:s\Z';
 	const MYSQL = 'Y-m-d H:i:s';
+	const HTTP = 'D, d M Y H:i:s \G\M\T';
 
 	/**
 	 * convert() shorthand for UTC.
diff --git a/src/Util/HTTPSignature.php b/src/Util/HTTPSignature.php
index 07ff5e805d..2b9e396241 100644
--- a/src/Util/HTTPSignature.php
+++ b/src/Util/HTTPSignature.php
@@ -12,6 +12,7 @@ use Friendica\Database\DBA;
 use Friendica\Model\User;
 use Friendica\Model\APContact;
 use Friendica\Protocol\ActivityPub;
+use Friendica\Util\DateTimeFormat;
 
 /**
  * @brief Implements HTTP Signatures per draft-cavage-http-signatures-07.
@@ -296,14 +297,15 @@ class HTTPSignature
 		$path = parse_url($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';