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<!-- $Id: unseal.php 900 2017-01-06 19:25:47Z kgoldman $ -->
<?php
/* (c) Copyright IBM Corporation 2016. */
/* */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions are */
/* met: */
/* */
/* Redistributions of source code must retain the above copyright notice, */
/* this list of conditions and the following disclaimer. */
/* */
/* Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in the */
/* documentation and/or other materials provided with the distribution. */
/* */
/* Neither the names of the IBM Corporation nor the names of its */
/* contributors may be used to endorse or promote products derived from */
/* this software without specific prior written permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR */
/* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */
/* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, */
/* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY */
/* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE */
/* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/********************************************************************************/
?>
<html>
<head>
<title>TSS 2.0 Demo Unseal
<?php
echo gethostname();
?>
</title>
<link rel="stylesheet" type="text/css" href="demo.css">
</head>
<body>
<div id="header">
<img src="ibm.png" style="float:right;width:200px;height:70px">
<h2>IBM TSS Demo Unseal -
<?php
echo gethostname();
?>
</h2>
</div>
<?php
require '/var/www/html/tpm2/nav.html';
?>
<div id="section">
<?php
require '/var/www/html/tpm2/halg.inc';
if ( $_SERVER['REQUEST_METHOD'] == 'POST' ) {
//print_r($_POST);
echo "<br>";
$command = $_POST['command']; // not used
$hp = $_POST['hp'];
$pwdp = $_POST['pwdp'];
$label = $_POST['label'];
$retval == 0;
// parameter checks
if ($retval == 0) {
if (strlen($hp) == 0) {
echo "Parent handle must be specified<br>";
$retval = 1;
}
if (strlen($label) == 0) {
echo "Sealed data label must be specified<br>";
$retval = 1;
}
}
// load the sealed data blob
if ($retval == 0) {
$commandStr = "/var/www/html/tpm2/load";
$commandStr .= " -hp " . $hp;
$commandStr .= " -ipu " . $label . "pub.key";
$commandStr .= " -ipr " . $label . "priv.key";
if (strlen($pwdp) != 0) {
$commandStr .= " -pwdp " . $pwdp;
}
//echo 'Command string: ' . $commandStr. "<br>";
unset($output);
exec ($commandStr, $output, $retval);
if ($retval != 0) {
echo $commandStr . "<br>";
for ($i = 0 ; $i < count($output) ; $i++) {
echo $output[$i] . "<br>";
}
}
}
// get the handle from the response
if ($retval == 0) {
//print_r($output);
$values = explode (" ", $output[0]);
$blobhandle = $values[1];
echo "Loaded handle: " . $blobhandle . "<br>";
}
// start policy session
if ($retval == 0) {
$commandStr = "/var/www/html/tpm2/startauthsession -se p -halg $halg";
//echo 'Command string: ' . $commandStr. "<br>";
unset($output);
exec ($commandStr, $output, $retval);
if ($retval != 0) {
echo $commandStr . "<br>";
for ($i = 0 ; $i < count($output) ; $i++) {
echo $output[$i] . "<br>";
}
}
}
if ($retval == 0) {
//print_r($output);
$values = explode (" ", $output[0]);
$sessionhandle = $values[1];
echo "Policy Session handle: " . $sessionhandle . "<br>";
}
// policypcr, select PCR 16
if ($retval == 0) {
$commandStr = "/var/www/html/tpm2/policypcr -halg $halg -bm 10000";
$commandStr .= " -ha " . $sessionhandle;
//echo 'Command string: ' . $commandStr. "<br>";
unset($output);
exec ($commandStr, $output, $retval);
if ($retval != 0) {
echo $commandStr . "<br>";
for ($i = 0 ; $i < count($output) ; $i++) {
echo $output[$i] . "<br>";
}
}
}
// unseal to message file
if ($retval == 0) {
$commandStr = "/var/www/html/tpm2/unseal";
$commandStr .= " -ha " . $blobhandle;
$commandStr .= " -of message.tmp";
$commandStr .= " -se0 " . $sessionhandle . " 1";
//echo 'Command string: ' . $commandStr. "<br>";
unset($output);
exec ($commandStr, $output, $retval);
if ($retval != 0) {
echo $commandStr . "<br>";
for ($i = 0 ; $i < count($output) ; $i++) {
echo $output[$i] . "<br>";
}
}
}
// display the message
if ($retval == 0) {
$message = file_get_contents('message.tmp');
echo "Unsealed message: " . $message . "<br>";
}
// flush session
if (strlen($sessionhandle) != 0) {
$commandStr = "/var/www/html/tpm2/flushcontext";
$commandStr .= " -ha " . $sessionhandle;
//echo 'Command string: ' . $commandStr. "<br>";
unset($output);
exec ($commandStr, $output, $retval);
if ($retval != 0) {
echo $commandStr . "<br>";
for ($i = 0 ; $i < count($output) ; $i++) {
echo $output[$i] . "<br>";
}
}
}
// flush sealed data blob
if (strlen($blobhandle) != 0) {
$commandStr = "/var/www/html/tpm2/flushcontext";
$commandStr .= " -ha " . $blobhandle;
//echo 'Command string: ' . $commandStr. "<br>";
unset($output);
exec ($commandStr, $output, $retval);
if ($retval != 0) {
echo $commandStr . "<br>";
for ($i = 0 ; $i < count($output) ; $i++) {
echo $output[$i] . "<br>";
}
}
}
unlink ('message.tmp');
}
?>
<form method="post" action="unseal.php">
<h2>Unseal</h2>
<p>
(For the IBM TSS demo, the Unseal policy is hard coded to PCR 16 with a SHA-256 value c2 11 97 64 ... or SHA-1 value 1d 47 f6 8a ... . Set this value by extending PCR 16 with PCR Extend Data aaa.)
</p>
Parent Handle <input type="text" name="hp" value="<?php
if (strlen($hp) != 0) {
echo $hp;
}
else {
echo "80000000";
}
?>">
<br>
Parent Password <input type="password" name="pwdp" value="<?php echo $pwdp; ?>">
<br>
Sealed Data Label <input type="text" name="label" value="<?php echo $label; ?>">
<br>
<input type="submit" name="command" value="Unseal">
</div>
<?php
require '/var/www/html/tpm2/footer.html';
?>
</body>
</html>
|
