From a779b96370d3353c8409d64b70c724fa783ad219 Mon Sep 17 00:00:00 2001 From: czaks Date: Mon, 15 Aug 2016 00:56:06 +0200 Subject: [PATCH] second iteration of nntpchan implementation --- inc/config.php | 24 +++++- inc/nntpchan/nntpchan.php | 149 ++++++++++++++++++++++++++++++++++++++ inc/nntpchan/tests.php | 30 ++++++++ post.php | 29 ++++++++ 4 files changed, 231 insertions(+), 1 deletion(-) create mode 100644 inc/nntpchan/nntpchan.php create mode 100644 inc/nntpchan/tests.php diff --git a/inc/config.php b/inc/config.php index a8afdf7a..bfb774a8 100644 --- a/inc/config.php +++ b/inc/config.php @@ -1693,6 +1693,11 @@ * ================== * NNTPChan settings * ================== + */ + +/* + * Please keep in mind that NNTPChan support in vichan isn't finished yet / is in an experimental + * state. Please join #nntpchan on Rizon in order to peer with someone. */ $config['nntpchan'] = array(); @@ -1703,9 +1708,26 @@ // NNTP server $config['nntpchan']['server'] = "localhost:1119"; - // Global dispatch array. Add your boards to it to enable them. + // Global dispatch array. Add your boards to it to enable them. Please make + // sure that this setting is set in a global context. $config['nntpchan']['dispatch'] = array(); // 'overchan.test' => 'test' + // Trusted peer - an IP address of your NNTPChan instance. This peer will have + // increased capabilities, eg.: will evade spamfilter. + $config['nntpchan']['trusted_peer'] = '127.0.0.1'; + + // Salt for message ID generation. Keep it long and secure. + $config['nntpchan']['salt'] = 'change_me+please'; + + // A local message ID domain. Make sure to change it. + $config['nntpchan']['domain'] = 'example.vichan.net'; + + // An NNTPChan group name. + // Please set this setting in your board/config.php, not globally. + $config['nntpchan']['group'] = false; // eg. 'overchan.test' + + + /* * ==================== * Other/uncategorized diff --git a/inc/nntpchan/nntpchan.php b/inc/nntpchan/nntpchan.php new file mode 100644 index 00000000..25215e94 --- /dev/null +++ b/inc/nntpchan/nntpchan.php @@ -0,0 +1,149 @@ +"; +} + + +function gen_nntp($headers, $files) { + if (count($files) == 0) { + } + else if (count($files) == 1 && $files[0]['type'] == 'text/plain') { + $content = $files[0]['text'] . "\r\n"; + $headers['Content-Type'] = "text/plain; charset=UTF-8"; + } + else { + $boundary = sha1($headers['Message-Id']); + $content = ""; + $headers['Content-Type'] = "multipart/mixed; boundary=$boundary"; + foreach ($files as $file) { + $content .= "--$boundary\r\n"; + if (isset($file['name'])) { + $file['name'] = preg_replace('/[\r\n\0"]/', '', $file['name']); + $content .= "Content-Disposition: form-data; filename=\"$file[name]\"; name=\"attachment\"\r\n"; + } + $type = explode('/', $file['type'])[0]; + if ($type == 'text') { + $file['type'] .= '; charset=UTF-8'; + } + $content .= "Content-Type: $file[type]\r\n"; + if ($type != 'text' && $type != 'message') { + $file['text'] = base64_encode($file['text']); + $content .= "Content-Transfer-Encoding: base64\r\n"; + } + $content .= "\r\n"; + $content .= $file['text']; + $content .= "\r\n"; + } + $content .= "--$boundary--\r\n"; + + $headers['Mime-Version'] = '1.0'; + } + //$headers['Content-Length'] = strlen($content); + $headers['Date'] = date('r', $headers['Date']); + $out = ""; + foreach ($headers as $id => $val) { + $val = str_replace("\n", "\n\t", $val); + $out .= "$id: $val\r\n"; + } + $out .= "\r\n"; + $out .= $content; + return $out; +} + +function nntp_publish($msg, $id) { + $s = fsockopen("tcp://localhost:1119"); + fgets($s); + fputs($s, "MODE STREAM\r\n"); + fgets($s); + fputs($s, "TAKETHIS $id\r\n"); + fputs($s, $msg); + fputs($s, "\r\n.\r\n"); + fgets($s); + fclose($s); +} + +function post2nntp($post, $msgid) { + global $config; + + $headers = array(); + $files = array(); + + $headers['Message-Id'] = $msgid; + $headers['Newsgroups'] = $config['nntpchan']['group']; + $headers['Date'] = time(); + $headers['Subject'] = $post['subject'] ? $post['subject'] : "None"; + $headers['From'] = $post['name'] . " "; + + if ($post['email'] == 'sage') { + $headers['X-Sage'] = true; + } + + if (!$post['op']) { + // Get muh parent + $query = prepare("SELECT `message_id` FROM ``nntp_references`` WHERE `board` = :board AND `id` = :id"); + $query->bindValue(':board', $post['board']); + $query->bindValue(':id', $post['thread']); + $query->execute() or error(db_error($query)); + + if ($result = $query->fetch(PDO::FETCH_ASSOC)) { + $headers['References'] = $result['message_id']; + } + else { + return false; // We don't have OP. Discarding. + } + } + + // Let's parse the body a bit. + $body = trim($post['body_nomarkup']); + $body = preg_replace('/\r?\n/', "\r\n", $body); + $body = preg_replace_callback('@>>(>/([a-zA-Z0-9_+-]+)/)?([0-9]+)@', function($o) use ($post) { + if ($o[1]) { + $board = $o[2]; + } + else { + $board = $post['board']; + } + $id = $o[3]; + + $query = prepare("SELECT `message_id_digest` FROM ``nntp_references`` WHERE `board` = :board AND `id` = :id"); + $query->bindValue(':board', $board); + $query->bindValue(':id', $id); + $query->execute() or error(db_error($query)); + + if ($result = $query->fetch(PDO::FETCH_ASSOC)) { + return ">>".substr($result['message_id_digest'], 0, 16); + } + else { + return $o[0]; // Should send URL imo + } + }, $body); + $body = preg_replace('/>>>>([0-9a-fA-F])+/', '>>\1', $body); + + + $files[] = array('type' => 'text/plain', 'text' => $body); + + foreach ($post['files'] as $id => $file) { + $fc = array(); + + $fc['type'] = $file['type']; + $fc['text'] = file_get_contents($file['file_path']); + $fc['name'] = $file['name']; + + $files[] = $fc; + } + + return array($headers, $files); +} diff --git a/inc/nntpchan/tests.php b/inc/nntpchan/tests.php new file mode 100644 index 00000000..a63789d7 --- /dev/null +++ b/inc/nntpchan/tests.php @@ -0,0 +1,30 @@ + "czaks ", "Message-Id" => "<1234.0000.".$time."@example.vichan.net>", "Newsgroups" => "overchan.test", "Date" => time(), "Subject" => "None"], +[['type' => 'text/plain', 'text' => "THIS IS A NEW TEST THREAD"]]); +echo "\n@@@@ Single msg:\n"; +echo $m1 = gennntp(["From" => "czaks ", "Message-Id" => "<1234.1234.".$time."@example.vichan.net>", "Newsgroups" => "overchan.test", "Date" => time(), "Subject" => "None", "References" => "<1234.0000.".$time."@example.vichan.net>"], +[['type' => 'text/plain', 'text' => "hello world, with no image :("]]); +echo "\n@@@@ Single msg and pseudoimage:\n"; +echo $m2 = gennntp(["From" => "czaks ", "Message-Id" => "<1234.2137.".$time."@example.vichan.net>", "Newsgroups" => "overchan.test", "Date" => time(), "Subject" => "None", "References" => "<1234.0000.".$time."@example.vichan.net>"], +[['type' => 'text/plain', 'text' => "hello world, now with an image!"], + ['type' => 'image/gif', 'text' => base64_decode("R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs="), 'name' => "urgif.gif"]]); +echo "\n@@@@ Single msg and two pseudoimages:\n"; +echo $m3 = gennntp(["From" => "czaks ", "Message-Id" => "<1234.1488.".$time."@example.vichan.net>", "Newsgroups" => "overchan.test", "Date" => time(), "Subject" => "None", "References" => "<1234.0000.".$time."@example.vichan.net>"], +[['type' => 'text/plain', 'text' => "hello world, now WITH TWO IMAGES!!!"], + ['type' => 'image/gif', 'text' => base64_decode("R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs="), 'name' => "urgif.gif"], + ['type' => 'image/gif', 'text' => base64_decode("R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs="), 'name' => "urgif2.gif"]]); +shoveitup($m0, "<1234.0000.".$time."@example.vichan.net>"); +sleep(1); +shoveitup($m1, "<1234.1234.".$time."@example.vichan.net>"); +sleep(1); +shoveitup($m2, "<1234.2137.".$time."@example.vichan.net>"); +shoveitup($m3, "<1234.1488.".$time."@example.vichan.net>"); + diff --git a/post.php b/post.php index 4590a534..1e4edcee 100644 --- a/post.php +++ b/post.php @@ -13,7 +13,12 @@ if ((!isset($_POST['mod']) || !$_POST['mod']) && $config['board_locked']) { $dropped_post = false; +// Is it a post coming from NNTP? Let's extract it and pretend it's a normal post. if (isset($_GET['Newsgroups']) && $config['nntpchan']['enabled']) { + if ($_SERVER['REMOTE_ADDR'] != $config['nntpchan']['trusted_peer']) { + error("NNTPChan: Forbidden. $_SERVER[REMOTE_ADDR] is not a trusted peer"); + } + $_POST = array(); $_POST['json_response'] = true; @@ -1057,7 +1062,31 @@ if (isset($_POST['delete'])) { $query->bindValue(':message_id_digest', sha1($dropped_post['msgid'])); $query->bindValue(':headers', $dropped_post['headers']); $query->execute() or error(db_error($query)); + } // ^^^^^ For inbound posts ^^^^^ + elseif ($config['nntpchan']['enabled'] && $config['nntpchan']['group']) { + // vvvvv For outbound posts vvvvv + + require_once('inc/nntpchan/nntpchan.php'); + $msgid = gen_msgid($post['board'], $post['id']); + + list($headers, $files) = post2nntp($post, $msgid); + + $message = gen_nntp($headers, $files); + + $query = prepare("INSERT INTO ``nntp_references`` (`board`, `id`, `message_id`, `message_id_digest`, `own`, `headers`) VALUES ". + "(:board , :id , :message_id , :message_id_digest , true , :headers)"); + + $query->bindValue(':board', $post['board']); + $query->bindValue(':id', $post['id']); + $query->bindValue(':message_id', $msgid); + $query->bindValue(':message_id_digest', sha1($msgid)); + $query->bindValue(':headers', json_encode($headers)); + $query->execute() or error(db_error($query)); + + // Let's broadcast it! + nntp_publish($message, $msgid); } + insertFloodPost($post); // Handle cyclical threads