From 5513df3ed8ce07ae9516d834c4ac176d5bfc0cf2 Mon Sep 17 00:00:00 2001
From: Cassio de Campos <cassiopc@gmail.com>
Date: Fri, 4 Aug 2017 12:00:11 +0100
Subject: fixes to code submission distribution

---
 src/getcode.php | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 src/getcode.php

(limited to 'src')

diff --git a/src/getcode.php b/src/getcode.php
new file mode 100644
index 0000000..c3ba9ab
--- /dev/null
+++ b/src/getcode.php
@@ -0,0 +1,49 @@
+<?php
+ob_start();
+header ("Expires: " . gmdate("D, d M Y H:i:s") . " GMT");
+header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
+header ("Cache-Control: no-cache, must-revalidate");
+header ("Pragma: no-cache");
+header ("Content-Type: text/html; charset=utf-8");
+session_start();
+if (!isset($_GET["name"])) {
+  session_unset();
+  session_destroy();
+  session_start();
+  echo session_id();
+  exit;
+}
+ob_end_flush();
+
+function myhash($k) {
+	return hash('sha256',$k);
+}
+$iv = "1234567812345678";
+
+if(isset($_GET["name"]) && $_GET["name"] != "" ) {
+  $name = $_GET["name"];
+  //  echo "name=" . $name . "\n";
+  $password = $_GET["password"];
+  //  echo "pass=" . $password . "\n";
+  $secrets = @file("/var/www/boca/src/private/codes");
+  for($i = 0; $i < count($secrets); $i++) {
+    $secret = explode(' ', $secrets[$i]);
+    //    echo "secret0=" . $secret[0] . "\n";
+    //    echo "session=" . session_id() . "\n";
+    $p = myhash($secret[1] . session_id());
+    //    echo "p=" . $p . "\n";
+    if($name == $secret[0] && $p == $password) {
+      $txt = "#!/bin/bash\n" .
+	"mkdir -p /root/submissions\n" .
+	"chmod 700 /root/submissions\n" .
+	"echo \"" . trim($secret[2]) . "\" > /root/submissions/code\n" .
+	"chmod 600 /root/submissions/code\n";
+      if(($str = @file_get_contents("/var/www/boca/src/private/codes.code")) !== false) $txt .= $str;
+      echo openssl_encrypt($txt, "aes-256-cbc", substr($secret[1],0,16), OPENSSL_RAW_DATA, $iv);
+      exit;
+    }
+  }
+}
+echo "incorrect\n";
+exit;
+?>
-- 
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