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townsec_key.module
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townsec_key.module
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<?php
// $Id$
/**
* @file
* Townsend Security Encryption module file.
*
* This file includes general functions for Townsend Security Encryption.
*/
/**
* Implements hook_ctools_plugin_directory().
*
* Tell ctools about our plugins.
*/
function townsec_key_ctools_plugin_directory($module, $plugin) {
if ($module == 'encrypt') {
return 'plugins/' . $plugin;
}
}
function townsec_key_menu(){
$items = array();
$items['test/akmtest'] = array(
'page callback' => 'townsec_key_test',
'access arguments' => array('administer encrypt'),
);
return $items;
}
function townsec_key_test(){
$provider = encrypt_get_key_provider('townsec_akm');
$settings = $provider['settings'];
$primencrypt = $settings['primary_server']['akm_encrypt_port'];
$bkupencrypt = $settings['backup_server']['akm_encrypt_port'];
$primserver = 'tls://'.$settings['primary_server']['akm_host_server'].':'.$primencrypt;
$bkupserver = 'tls://'.$settings['backup_server']['akm_backup_server'].':'.$bkupencrypt;
$keyname = $settings['key_name'];
$errno = NULL;
$errstr = NULL;
//For now we assume Binary
//$encode = $settings['encode'];
$primlocal = DRUPAL_ROOT . '/' . $settings['primary_server']['client_cert_and_key_file'];
$primca = DRUPAL_ROOT . '/' . $settings['primary_server']['ca_cert_file'];
$bkuplocal = DRUPAL_ROOT . '/' . $settings['backup_server']['client_cert_and_key_file'];
$bkupca = DRUPAL_ROOT . '/' . $settings['backup_server']['ca_cert_file'];
$op = 'encrypt';
$text = 'Hello';
$text = base64_encode($text);
//Create TLS Connection with provided key locations
$primopts = array(
'ssl' => array(
'cafile' => $primca,
'capture_peer_cert' => true,
'local_cert' => $primlocal,
'verify_peer' => true,
)
);
$bkupopts = array(
'ssl' => array(
'cafile' => $bkupca,
'capture_peer_cert' => true,
'local_cert' => $bkuplocal,
'verify_peer' => true,
)
);
//Create TLS context
$primctx = stream_context_create($primopts);
$bkupctx = stream_context_create($bkupopts);
if($fp = stream_socket_client($primserver, $errno, $errstr, 30, STREAM_CLIENT_CONNECT, $primctx)){}
elseif($fp = stream_socket_client($bkupserver, $errno, $errstr, 30, STREAM_CLIENT_CONNECT, $bkupctx)){}
if($fp == false){
dpm('whoops!');
return '';
}
dpm("I'm trying to " . $op . " with " . $text);
/*
Key Length = 40 (left justify pad on right)
Instance = 24 (leave blank or instance got back)
*/
if($op == 'encrypt'){
//Generate a random IV to use w/ the encryption
$iv = user_password(16);
$textcount = sprintf('%05d', strlen($text));
if($textcount < 16){
$text = sprintf('% -16s', $text);
$textcount = sprintf('%05d', strlen($text));
}
else{
return '';
}
$key = sprintf('% -64s', $keyname);
$request = sprintf("000982019YNB64". $textcount . "YNYY" . $iv . "" . $key . "" . "" . $text . "");
fputs($fp, $request);
$len = fread($fp, 5);
if($len){
$return = fread($fp, $len + $textcount);
if($return){
dpm('i just got back ' . $return);
$inst = substr($return, 15, 24);
$coded = substr($return, 39);
$value = $iv . $inst . $coded;
}
}
else{
return '';
}
fclose($fp);
dpm('the encrypted value is ' . $value);
$text = $value;
if($fp = stream_socket_client($primserver, $errno, $errstr, 30, STREAM_CLIENT_CONNECT, $primctx)){}
elseif($fp = stream_socket_client($bkupserver, $errno, $errstr, 30, STREAM_CLIENT_CONNECT, $bkupctx)){}
$iv = substr($text, 0, 16);
$inst = substr($text, 16, 24);
$coded = substr($text, 40);
dpm('the iv to decrypt is ' . $iv . ' with the key instance ' . $inst . ' and the value ' . $coded);
$textcount = sprintf('%05d', strlen($coded));
$keypad = sprintf('% -40s', $keyname);
$key = $keypad . $inst;
$decrypt_header = "001012021YNB64" . $textcount . "BINYNYY".$iv.$key;
$decrypt = sprintf($decrypt_header.$coded);
dpm("here's the request " . $decrypt);
fputs($fp, $decrypt);
$len = fread($fp, 5);
dpm($len);
if($len){
$rsp = fread($fp, $len + $textcount);
if($rsp){
dpm('voila! We got ' . $rsp);
$value = substr($rsp, 39);
$value = rtrim($value);
dpm('you looking for... ' .$value);
}
}
else{
return '';
}
fclose($fp);
return $value;
}
}
function townsend_akm_errorHandler($errno, $errstr){
echo"<br />\nerror [$errno] $errstr";
return false;
}