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645 lines
23 KiB
PHP
645 lines
23 KiB
PHP
<? /*
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LibreSSL - CAcert web application
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Copyright (C) 2004-2008 CAcert Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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$id = 0; if(array_key_exists("id",$_REQUEST)) $id=intval($_REQUEST['id']);
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$expand="";
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function showheader($title = "CAcert.org", $title2 = "")
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{
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global $id, $PHP_SELF;
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$expand="";
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$tmpid = $id;
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if($PHP_SELF == "/wot.php")
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$tmpid = $id + 500;
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if($PHP_SELF == "/gpg.php")
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$tmpid = $id + 1000;
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if($PHP_SELF == "/disputes.php")
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$tmpid = $id + 1500;
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if($PHP_SELF == "/advertising.php")
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$tmpid = $id + 2000;
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switch($tmpid)
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{
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case 1:
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case 2: $expand = " explode('emailacc');"; break;
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case 3:
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case 4:
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case 5:
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case 6: $expand = " explode('clicerts');"; break;
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case 7:
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case 8:
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case 9: $expand = " explode('domains');"; break;
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case 10:
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case 11:
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case 12:
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case 15: $expand = " explode('servercert');"; break;
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case 13:
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case 14:
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case 36:
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case 41:
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case 507:
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case 508:
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case 513: $expand = " explode('mydetails');"; break;
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case 16:
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case 17:
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case 18:
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case 19: $expand = " explode('clientorg');"; break;
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case 20:
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case 21:
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case 22:
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case 23: $expand = " explode('serverorg');"; break;
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case 24:
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case 25:
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case 26:
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case 27:
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case 28:
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case 29:
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case 30:
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case 31:
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case 32:
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case 33:
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case 34:
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case 35: $expand = " explode('orgadmin');"; break;
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case 42:
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case 43:
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case 44:
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case 45:
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case 46:
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case 47:
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case 48:
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case 49:
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case 50:
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case 54:
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case 53: $expand = " explode('sysadmin');"; break;
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case 500:
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case 501:
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case 502:
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case 503:
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case 504:
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case 505:
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case 506:
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case 509:
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case 510:
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case 511:
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case 512: $expand = " explode('WoT');"; break;
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case 1000:
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case 1001:
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case 1002:
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case 1003:
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case 1004:
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case 1005:
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case 1006:
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case 1007:
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case 1008:
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case 1009:
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case 1010: $expand = " explode('gpg');"; break;
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case 1500:
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case 1501:
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case 1502:
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case 1503:
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case 1504:
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case 1505:
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case 1506:
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case 1507:
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case 1508:
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case 1509:
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case 1510: $expand = " explode('disputes');"; break;
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case 2000:
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case 2001:
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case 2002:
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case 2003:
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case 2004:
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case 2005:
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case 2006:
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case 2007:
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case 2008:
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case 2009: $expand = " explode('advertising');"; break;
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}
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?><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<title><?=$title?></title>
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<? if(array_key_exists('header',$_SESSION) && $_SESSION['_config']['header'] != "") { ?><?=$_SESSION['_config']['header']?><? } ?>
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<link rel="stylesheet" href="/styles/default.css" type="text/css" />
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<script language="JavaScript" type="text/javascript">
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function explode(e) {
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if (document.getElementById(e).style.display == 'none') {
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document.getElementById(e).style.display = 'block';
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} else {
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document.getElementById(e).style.display = 'none';
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}
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}
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function hideall() {
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var Nodes = document.getElementsByTagName('ul')
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var max = Nodes.length
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for(var i = 0;i < max;i++) {
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var nodeObj = Nodes.item(i)
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if (nodeObj.className == "menu") {
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nodeObj.style.display = 'none';
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}
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}
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}
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</script>
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</head>
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<body onload="hideall(); explode('home');<?=$expand?>">
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<div id="pagecell1">
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<div id="pageName"><br>
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<div id="pageLogo"><a href="http://<?=$_SESSION['_config']['normalhostname']?>"><img src="/images/cacert4.png" border="0" alt="CAcert.org logo"></a></div>
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<div id="googlead"><h2><?=_("Free digital certificates!")?></h2></div>
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</div>
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<div id="pageNav">
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<div class="relatedLinks">
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<h3>CAcert.org</h3>
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<ul class="menu" id="home"><li><a href="/index.php"><?=_("Go Home")?></a></li><li><a href="account.php?id=logout"><?=_("Logout")?></a></li></ul>
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</div>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('mydetails')">+ <?=_("My Details")?></h3>
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<ul class="menu" id="mydetails"><li><a href="account.php?id=13"><?=_("Edit")?></a></li><li><a href="account.php?id=14"><?=_("Change Password")?></a></li><li><a href="account.php?id=41"><?=_("Default Language")?></a></li><li><a href="wot.php?id=8"><?=_("My Listing")?></a></li><li><a href="wot.php?id=13"><?=_("My Location")?></a></li><li><a href="account.php?id=36"><?=_("My Alert Settings")?></a></li><li><a href="wot.php?id=10"><?=_("My Points")?></a></li><?
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if($_SESSION['profile']['id'] == 1 || $_SESSION['profile']['id'] == 5897)
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echo "<li><a href='sqldump.php'>SQL Dump</a></li>";
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?></ul>
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</div>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('emailacc')">+ <?=_("Email Accounts")?></h3>
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<ul class="menu" id="emailacc"><li><a href="account.php?id=1"><?=_("Add")?></a></li><li><a href="account.php?id=2"><?=_("View")?></a></li></ul>
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</div>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('clicerts')">+ <?=_("Client Certificates")?></h3>
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<ul class="menu" id="clicerts"><li><a href="account.php?id=3"><?=_("New")?></a></li><li><a href="account.php?id=5"><?=_("View")?></a></li></ul>
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</div>
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<? if($_SESSION['profile']['points'] >= 50) { ?>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('gpg')">+ <?=_("GPG/PGP Keys")?></h3>
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<ul class="menu" id="gpg"><li><a href="gpg.php?id=0"><?=_("New")?></a></li><li><a href="gpg.php?id=2"><?=_("View")?></a></li></ul>
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</div>
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<? } ?>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('domains')">+ <?=_("Domains")?></h3>
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<ul class="menu" id="domains"><li><a href="account.php?id=7"><?=_("Add")?></a></li><li><a href="account.php?id=9"><?=_("View")?></a></li></ul>
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</div>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('servercert')">+ <?=_("Server Certificates")?></h3>
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<ul class="menu" id="servercert"><li><a href="account.php?id=10"><?=_("New")?></a></li><li><a href="account.php?id=12"><?=_("View")?></a></li></ul>
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</div>
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<? if(mysql_num_rows(mysql_query("select * from `org` where `memid`='".intval($_SESSION['profile']['id'])."'")) > 0 || $_SESSION['profile']['orgadmin'] == 1) { ?>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('clientorg')">+ <?=_("Org Client Certs")?></h3>
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<ul class="menu" id="clientorg"><li><a href="account.php?id=16"><?=_("New")?></a></li><li><a href="account.php?id=18"><?=_("View")?></a></li></ul>
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</div>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('serverorg')">+ <?=_("Org Server Certs")?></h3>
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<ul class="menu" id="serverorg"><li><a href="account.php?id=20"><?=_("New")?></a></li><li><a href="account.php?id=22"><?=_("View")?></a></li></ul>
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</div>
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<? } ?>
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<? if(mysql_num_rows(mysql_query("select * from `org` where `memid`='".intval($_SESSION['profile']['id'])."' and `masteracc`='1'")) > 0 || $_SESSION['profile']['orgadmin'] == 1) { ?>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('orgadmin')">+ <?=_("Org Admin")?></h3>
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<ul class="menu" id="orgadmin"><? if($_SESSION['profile']['orgadmin'] == 1) { ?><li><a href="account.php?id=24"><?=_("New Organisation")?></a></li><li><a href="account.php?id=25"><?=_("View Organisations")?></a></li><? } ?><li><a href="account.php?id=35"><?=_("View")?></a></li></ul>
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</div>
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<? } ?>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('WoT')">+ <?=_("CAcert Web of Trust")?></h3>
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<ul class="menu" id="WoT"><li><a href="wot.php?id=0"><?=_("About")?></a></li><li><a href="wot.php?id=12"><?=_("Find an Assurer")?></a></li><li><a href="wot.php?id=3"><?=_("Rules")?></a></li><li><? if($_SESSION['profile']['assurer'] != 1) { ?><a href="wot.php?id=2"><?=_("Becoming an Assurer")?></a><? } else { ?><a href="wot.php?id=5"><?=_("Assure Someone")?></a><? } ?></li><li><a href="wot.php?id=4"><?=_("Trusted ThirdParties")?></a></li><? if($_SESSION['profile']['points'] >= 500) { ?><li><a href="wot.php?id=11"><div style="white-space:nowrap"><?=_("Organisation Assurance")?></div></a></li><? } ?><li><a href="account.php?id=55"><?=_("Training")?></a></li></ul>
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</div>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('WoTForms')">+ <?=_("CAP Forms")?></h3><?
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$name = $_SESSION['profile']['fname']." ".$_SESSION['profile']['mname']." ".$_SESSION['profile']['lname']." ".$_SESSION['profile']['suffix'];
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while(strstr($name, " "))
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$name = str_replace(" ", " ", $name);
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$extra = "?name=".urlencode($name);
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$extra .= "&dob=".urlencode($_SESSION['profile']['dob']);
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$extra .= "&email=".urlencode($_SESSION['profile']['email']);
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$extra2 = "?assurer=".urlencode($name)."&date=now&maxpoints=".maxpoints();
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?>
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<ul class="menu" id="WoTForms">
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<li><a href="/cap.php<?=$extra?>">A4 - <?=_("WoT Form")?></a></li>
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<li><a href="/cap.php<?=$extra?>&format=letter">US - <?=_("WoT Form")?></a></li>
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<? /* <li><div style="white-space:nowrap"><a href="/ttp.php<?=$extra?>">A4 - <?=_("TTP Form")?></a></div></li>
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<li><div style="white-space:nowrap"><a href="/ttp.php<?=$extra?>&format=letter">US - <?=_("TTP Form")?></a></div></li> */
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?>
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<? if($_SESSION['profile']['points'] > 100) { ?><li><div style="white-space:nowrap"><a href="/cap.php<?=$extra2?>">A4 - <?=_("Assurance Form")?></a></div></li>
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<li><div style="white-space:nowrap"><a href="/cap.php<?=$extra2?>&format=letter">US - <?=_("Assurance Form")?></a></div></li>
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<? } ?>
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<? /*
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<li><div style="white-space:nowrap"><a href="/ttp.php">A4 - <?=_("Blank TTP Form")?></a></div></li>
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<li><div style="white-space:nowrap"><a href="/ttp.php?&format=letter">US - <?=_("Blank TTP Form")?></a></div></li>
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*/ ?>
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<li><div style="white-space:nowrap"><a href="/cap.php">A4 - <?=_("Blank CAP Form")?></a></div></li>
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<li><div style="white-space:nowrap"><a href="/cap.php?&format=letter">US - <?=_("Blank CAP Form")?></a></div></li></ul>
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</div>
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<? if($_SESSION['profile']['admin'] == 1 || $_SESSION['profile']['locadmin'] == 1) { ?>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('sysadmin')">+ <?=_("System Admin")?></h3>
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<ul class="menu" id="sysadmin"><? if($_SESSION['profile']['admin'] == 1) { ?><li><a href="account.php?id=42"><?=_("Find User")?></a></li><li><a href="account.php?id=48"><?=_("Find Domain")?></a></li><? } if($_SESSION['profile']['locadmin'] == 1) { ?><li><a href="account.php?id=53"><?=_("Location DB")?></a></li><? } ?></ul>
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</div>
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<? } ?>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('disputes')">+ <?=_("Disputes/Abuses")?></h3>
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<ul class="menu" id="disputes"><li><a href="disputes.php?id=0"><?=_("More Information")?></a></li><li><a href="disputes.php?id=1"><?=_("Email Dispute")?></a></li><li><a href="disputes.php?id=2"><?=_("Domain Dispute")?></a></li><? if($_SESSION['profile']['admin'] == 1) { ?><li><a href="disputes.php?id=3"><?=_("Abuses")?></a></li><? } ?></ul>
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</div>
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<? if($_SESSION['profile']['adadmin'] >= 1) { ?>
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<div class="relatedLinks">
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<h3 class="pointer" onclick="explode('advertising')">+ <?=_("Advertising")?></h3>
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<ul class="menu" id="advertising"><li><a href="advertising.php?id=1"><?=_("New Ad")?></a></li><li><a href="advertising.php?id=0"><?=_("View Ads")?></a></li></ul>
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</div>
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<? } ?>
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</div>
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<div id="content">
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<div class="story">
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<h3><?=$title2?></h3>
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<? if($_SESSION['_config']['errmsg'] != "") { ?>
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<p><font color="#ff0000" size="+2"><? echo $_SESSION['_config']['errmsg']; $_SESSION['_config']['errmsg'] = ""; ?> </font></p>
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<? } ?>
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<?
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}
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function showfooter()
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{
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?>
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</div>
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</div>
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<div id="siteInfo"><a href="//wiki.cacert.org/FAQ/AboutUs"><?=_("About Us")?></a> | <a href="account.php?id=38"><?=_("Donations")?></a> | <a href="http://wiki.cacert.org/wiki/CAcertIncorporated"><?=_("Association Membership")?></a> |
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<a href="/policy/PrivacyPolicy.html"><?=_("Privacy Policy")?></a> | <a href="account.php?id=40"><?=_("Contact Us")?></a>
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| ©2002-<?=date("Y")?> <?=_("by CAcert")?></div>
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</div>
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</body>
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</html><?
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}
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/**
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* Produces a log entry with the error message with log level E_USER_WARN
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* and a random ID an returns a message that can be displayed to the user
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* including the generated ID
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*
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* @param $errormessage string
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* The error message that should be logged
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* @return string containing the generated ID that can be displayed to the
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* user
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*/
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function failWithId($errormessage) {
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$errorId = rand();
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trigger_error("$errormessage. ID: $errorId", E_USER_WARNING);
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return sprintf(_("Something went wrong when processing your request. ".
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"Please contact %s for help and provide them with the ".
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"following ID: %d"),
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"<a href='mailto:support@cacert.org?subject=System%20Error%20-%20".
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"ID%3A%20$errorId'>support@cacert.org</a>",
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$errorId);
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}
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/**
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* Checks whether the given CSR contains a vulnerable key
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*
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* @param $csr string
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* The CSR to be checked
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* @param $encoding string [optional]
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* The encoding the CSR is in (for the "-inform" parameter of OpenSSL,
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* currently only "PEM" (default) or "DER" allowed)
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* @return string containing the reason if the key is considered weak,
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* empty string otherwise
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*/
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function checkWeakKeyCSR($csr, $encoding = "PEM")
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{
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// non-PEM-encodings may be binary so don't use echo
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$descriptorspec = array(
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0 => array("pipe", "r"), // STDIN for child
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1 => array("pipe", "w"), // STDOUT for child
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);
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$encoding = escapeshellarg($encoding);
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$proc = proc_open("openssl req -inform $encoding -text -noout",
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$descriptorspec, $pipes);
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if (is_resource($proc))
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{
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fwrite($pipes[0], $csr);
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fclose($pipes[0]);
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$csrText = "";
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while (!feof($pipes[1]))
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{
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$csrText .= fread($pipes[1], 8192);
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}
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fclose($pipes[1]);
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if (($status = proc_close($proc)) !== 0 || $csrText === "")
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{
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return _("I didn't receive a valid Certificate Request, hit ".
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"the back button and try again.");
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}
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} else {
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return failWithId("checkWeakKeyCSR(): Failed to start OpenSSL");
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}
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return checkWeakKeyText($csrText);
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}
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/**
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* Checks whether the given X509 certificate contains a vulnerable key
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*
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* @param $cert string
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* The X509 certificate to be checked
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* @param $encoding string [optional]
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* The encoding the certificate is in (for the "-inform" parameter of
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* OpenSSL, currently only "PEM" (default), "DER" or "NET" allowed)
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* @return string containing the reason if the key is considered weak,
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* empty string otherwise
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*/
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function checkWeakKeyX509($cert, $encoding = "PEM")
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{
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// non-PEM-encodings may be binary so don't use echo
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$descriptorspec = array(
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0 => array("pipe", "r"), // STDIN for child
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1 => array("pipe", "w"), // STDOUT for child
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);
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$encoding = escapeshellarg($encoding);
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$proc = proc_open("openssl x509 -inform $encoding -text -noout",
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$descriptorspec, $pipes);
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if (is_resource($proc))
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{
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fwrite($pipes[0], $cert);
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fclose($pipes[0]);
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|
|
$certText = "";
|
|
while (!feof($pipes[1]))
|
|
{
|
|
$certText .= fread($pipes[1], 8192);
|
|
}
|
|
fclose($pipes[1]);
|
|
|
|
if (($status = proc_close($proc)) !== 0 || $certText === "")
|
|
{
|
|
return _("I didn't receive a valid Certificate Request, hit ".
|
|
"the back button and try again.");
|
|
}
|
|
} else {
|
|
return failWithId("checkWeakKeyCSR(): Failed to start OpenSSL");
|
|
}
|
|
|
|
|
|
return checkWeakKeyText($certText);
|
|
}
|
|
|
|
/**
|
|
* Checks whether the given SPKAC contains a vulnerable key
|
|
*
|
|
* @param $spkac string
|
|
* The SPKAC to be checked
|
|
* @param $spkacname string [optional]
|
|
* The name of the variable that contains the SPKAC. The default is
|
|
* "SPKAC"
|
|
* @return string containing the reason if the key is considered weak,
|
|
* empty string otherwise
|
|
*/
|
|
function checkWeakKeySPKAC($spkac, $spkacname = "SPKAC")
|
|
{
|
|
/* Check for the debian OpenSSL vulnerability */
|
|
|
|
$spkac = escapeshellarg($spkac);
|
|
$spkacname = escapeshellarg($spkacname);
|
|
$spkacText = `echo $spkac | openssl spkac -spkac $spkacname`;
|
|
if ($spkacText === null) {
|
|
return _("I didn't receive a valid Certificate Request, hit the ".
|
|
"back button and try again.");
|
|
}
|
|
|
|
return checkWeakKeyText($spkacText);
|
|
}
|
|
|
|
/**
|
|
* Checks whether the given text representation of a CSR or a SPKAC contains
|
|
* a weak key
|
|
*
|
|
* @param $text string
|
|
* The text representation of a key as output by the
|
|
* "openssl <foo> -text -noout" commands
|
|
* @return string containing the reason if the key is considered weak,
|
|
* empty string otherwise
|
|
*/
|
|
function checkWeakKeyText($text)
|
|
{
|
|
/* Which public key algorithm? */
|
|
if (!preg_match('/^\s*Public Key Algorithm: ([^\s]+)$/m', $text,
|
|
$algorithm))
|
|
{
|
|
return failWithId("checkWeakKeyText(): Couldn't extract the ".
|
|
"public key algorithm used");
|
|
} else {
|
|
$algorithm = $algorithm[1];
|
|
}
|
|
|
|
|
|
if ($algorithm === "rsaEncryption")
|
|
{
|
|
if (!preg_match('/^\s*RSA Public Key: \((\d+) bit\)$/m', $text,
|
|
$keysize))
|
|
{
|
|
return failWithId("checkWeakKeyText(): Couldn't parse the RSA ".
|
|
"key size");
|
|
} else {
|
|
$keysize = intval($keysize[1]);
|
|
}
|
|
|
|
if ($keysize < 1024)
|
|
{
|
|
return sprintf(_("The keys that you use are very small ".
|
|
"and therefore insecure. Please generate stronger ".
|
|
"keys. More information about this issue can be ".
|
|
"found in %sthe wiki%s"),
|
|
"<a href='//wiki.cacert.org/WeakKeys#SmallKey'>",
|
|
"</a>");
|
|
} elseif ($keysize < 2048) {
|
|
// not critical but log so we have some statistics about
|
|
// affected users
|
|
trigger_error("checkWeakKeyText(): Certificate for small ".
|
|
"key (< 2048 bit) requested", E_USER_NOTICE);
|
|
}
|
|
|
|
|
|
$debianVuln = checkDebianVulnerability($text, $keysize);
|
|
if ($debianVuln === true)
|
|
{
|
|
return sprintf(_("The keys you use have very likely been ".
|
|
"generated with a vulnerable version of OpenSSL which ".
|
|
"was distributed by debian. Please generate new keys. ".
|
|
"More information about this issue can be found in ".
|
|
"%sthe wiki%s"),
|
|
"<a href='//wiki.cacert.org/WeakKeys#DebianVulnerability'>",
|
|
"</a>");
|
|
} elseif ($debianVuln === false) {
|
|
// not vulnerable => do nothing
|
|
} else {
|
|
return failWithId("checkWeakKeyText(): Something went wrong in".
|
|
"checkDebianVulnerability()");
|
|
}
|
|
|
|
if (!preg_match('/^\s*Exponent: (\d+) \(0x[0-9a-fA-F]+\)$/m', $text,
|
|
$exponent))
|
|
{
|
|
return failWithId("checkWeakKeyText(): Couldn't parse the RSA ".
|
|
"exponent");
|
|
} else {
|
|
$exponent = $exponent[1]; // exponent might be very big =>
|
|
//handle as string using bc*()
|
|
|
|
if (bccomp($exponent, "3") === 0)
|
|
{
|
|
return sprintf(_("The keys you use might be insecure. ".
|
|
"Although there is currently no known attack for ".
|
|
"reasonable encryption schemes, we're being ".
|
|
"cautious and don't allow certificates for such ".
|
|
"keys. Please generate stronger keys. More ".
|
|
"information about this issue can be found in ".
|
|
"%sthe wiki%s"),
|
|
"<a href='//wiki.cacert.org/WeakKeys#SmallExponent'>",
|
|
"</a>");
|
|
} elseif (!(bccomp($exponent, "65537") >= 0 &&
|
|
(bccomp($exponent, "100000") === -1 ||
|
|
// speed things up if way smaller than 2^256
|
|
bccomp($exponent, bcpow("2", "256")) === -1) )) {
|
|
// 65537 <= exponent < 2^256 recommended by NIST
|
|
// not critical but log so we have some statistics about
|
|
// affected users
|
|
trigger_error("checkWeakKeyText(): Certificate for ".
|
|
"unsuitable exponent '$exponent' requested",
|
|
E_USER_NOTICE);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* No weakness found */
|
|
return "";
|
|
}
|
|
|
|
/**
|
|
* Reimplement the functionality of the openssl-vulnkey tool
|
|
*
|
|
* @param $text string
|
|
* The text representation of a key as output by the
|
|
* "openssl <foo> -text -noout" commands
|
|
* @param $keysize int [optional]
|
|
* If the key size is already known it can be provided so it doesn't
|
|
* have to be parsed again. This also skips the check whether the key
|
|
* is an RSA key => use wisely
|
|
* @return TRUE if key is vulnerable, FALSE otherwise, NULL in case of error
|
|
*/
|
|
function checkDebianVulnerability($text, $keysize = 0)
|
|
{
|
|
$keysize = intval($keysize);
|
|
|
|
if ($keysize === 0)
|
|
{
|
|
/* Which public key algorithm? */
|
|
if (!preg_match('/^\s*Public Key Algorithm: ([^\s]+)$/m', $text,
|
|
$algorithm))
|
|
{
|
|
trigger_error("checkDebianVulnerability(): Couldn't extract ".
|
|
"the public key algorithm used", E_USER_WARNING);
|
|
return null;
|
|
} else {
|
|
$algorithm = $algorithm[1];
|
|
}
|
|
|
|
if ($algorithm !== "rsaEncryption") return false;
|
|
|
|
/* Extract public key size */
|
|
if (!preg_match('/^\s*RSA Public Key: \((\d+) bit\)$/m', $text,
|
|
$keysize))
|
|
{
|
|
trigger_error("checkDebianVulnerability(): Couldn't parse the ".
|
|
"RSA key size", E_USER_WARNING);
|
|
return null;
|
|
} else {
|
|
$keysize = intval($keysize[1]);
|
|
}
|
|
}
|
|
|
|
// $keysize has been made sure to contain an int
|
|
$blacklist = "/usr/share/openssl-blacklist/blacklist.RSA-$keysize";
|
|
if (!(is_file($blacklist) && is_readable($blacklist)))
|
|
{
|
|
if (in_array($keysize, array(512, 1024, 2048, 4096)))
|
|
{
|
|
trigger_error("checkDebianVulnerability(): Blacklist for ".
|
|
"$keysize bit keys not accessible. Expected at ".
|
|
"$blacklist", E_USER_ERROR);
|
|
return null;
|
|
}
|
|
|
|
trigger_error("checkDebianVulnerability(): $blacklist is not ".
|
|
"readable. Unsupported key size?", E_USER_WARNING);
|
|
return false;
|
|
}
|
|
|
|
|
|
/* Extract RSA modulus */
|
|
if (!preg_match('/^\s*Modulus \(\d+ bit\):\n'.
|
|
'((?:\s*[0-9a-f][0-9a-f]:(?:\n)?)+[0-9a-f][0-9a-f])$/m',
|
|
$text, $modulus))
|
|
{
|
|
trigger_error("checkDebianVulnerability(): Couldn't extract the ".
|
|
"RSA modulus", E_USER_WARNING);
|
|
return null;
|
|
} else {
|
|
$modulus = $modulus[1];
|
|
// strip whitespace and colon leftovers
|
|
$modulus = str_replace(array(" ", "\t", "\n", ":"), "", $modulus);
|
|
|
|
// when using "openssl xxx -text" first byte was 00 in all my test
|
|
// cases but 00 not present in the "openssl xxx -modulus" output
|
|
if ($modulus[0] === "0" && $modulus[1] === "0")
|
|
{
|
|
$modulus = substr($modulus, 2);
|
|
} else {
|
|
trigger_error("checkDebianVulnerability(): First byte is not ".
|
|
"zero", E_USER_NOTICE);
|
|
}
|
|
|
|
$modulus = strtoupper($modulus);
|
|
}
|
|
|
|
|
|
/* calculate checksum and look it up in the blacklist */
|
|
$checksum = substr(sha1("Modulus=$modulus\n"), 20);
|
|
|
|
// $checksum and $blacklist should be safe, but just to make sure
|
|
$checksum = escapeshellarg($checksum);
|
|
$blacklist = escapeshellarg($blacklist);
|
|
exec("grep $checksum $blacklist", $dummy, $debianVuln);
|
|
if ($debianVuln === 0) // grep returned something => it is on the list
|
|
{
|
|
return true;
|
|
} elseif ($debianVuln === 1) { // grep returned nothing
|
|
return false;
|
|
} else {
|
|
trigger_error("checkDebianVulnerability(): Something went wrong ".
|
|
"when looking up the key with checksum $checksum in the ".
|
|
"blacklist $blacklist", E_USER_ERROR);
|
|
return null;
|
|
}
|
|
|
|
// Should not get here
|
|
return null;
|
|
}
|
|
?>
|