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Copy pathparam.php
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154 lines (127 loc) · 4.89 KB
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<?php
/*
All Emoncms code is released under the GNU Affero General Public License.
See COPYRIGHT.txt and LICENSE.txt.
---------------------------------------------------------------------
Emoncms - open source energy visualisation
Part of the OpenEnergyMonitor project:
http://openenergymonitor.org
*/
// no direct access
defined('EMONCMS_EXEC') or die('Restricted access');
class Param
{
private $route;
private $user;
private $params = array();
// Associative array to make search fast
private $allowed_apis = array("input/post","input/bulk");
public $sha256base64_response = false;
public function __construct($route, $user)
{
$this->route = $route;
$this->user = $user;
$this->load();
}
public function load()
{
$this->params = array();
array_walk_recursive($_GET, function(&$value, $key) {
if (is_string($value)) {
$value = stripslashes($value);
}
});
foreach ($_GET as $key => $val) {
$this->params[$key] = $val;
}
array_walk_recursive($_POST, function(&$value, $key) {
if (is_string($value)) {
$value = stripslashes($value);
}
});
foreach ($_POST as $key => $val) {
$this->params[$key] = $val;
}
// Temporary restriction on allowed api's for encrypted method
$allowed_apis = array_flip($this->allowed_apis);
$api = $this->route->controller."/".$this->route->action;
if (!isset($allowed_apis[$api])) {
return false;
}
// Decode encrypted parameters
if (isset($_SERVER["CONTENT_TYPE"]) && ($_SERVER["CONTENT_TYPE"]=="aes128cbc" || $_SERVER["CONTENT_TYPE"]=="aes128cbcgz")) {
// Fetch authorization header
if (!isset($_SERVER["HTTP_AUTHORIZATION"])) {
echo "missing authorization header";
die;
}
$authorization = explode(":", $_SERVER["HTTP_AUTHORIZATION"]);
if (count($authorization)!=2) {
echo "authorization header format should be userid:hmac";
die;
}
$userid = $authorization[0];
$hmac1 = $authorization[1];
// Fetch user
$apikey = $this->user->get_apikey_write($userid);
if ($apikey===false) {
echo "User not found";
die;
}
// Fetch encrypted data from POST body
$base64EncryptedData = file_get_contents('php://input');
if ($base64EncryptedData=="") {
echo "no content in post body";
die;
}
// The base64 is converted from "URL safe" code to standard base64 (RFC2045 etc),
// then it is decoded into the binary encrypted data
$encryptedData = base64_decode(str_replace(array('-','_'), array('+','/'), $base64EncryptedData));
// The binary encrypted data is decrypted using the apikey.
// Note that the first 16 bytes of the encrypted data string are the IV and
// the actual data follows
$decrypted = @openssl_decrypt(substr($encryptedData, 16), 'AES-128-CBC', hex2bin($apikey), OPENSSL_RAW_DATA, substr($encryptedData, 0, 16));
// HMAC generated from decoded data
$hmac2 = hash_hmac('sha256', $decrypted, hex2bin($apikey));
if (!hash_equals($hmac1, $hmac2)) {
echo "invalid data";
die;
}
global $session; // USE OF GLOBAL HERE!
if (!is_array($session)) $session = array();
$session["write"] = true;
$session["read"] = true;
$session["userid"] = $userid;
if ($_SERVER["CONTENT_TYPE"]=="aes128cbcgz") {
$dataString = gzuncompress($decrypted);
} else {
$dataString = $decrypted;
}
foreach (explode('&', $dataString) as $chunk) {
$param = explode("=", $chunk);
if (count($param)==2) {
$key = $param[0];
$val = $param[1];
$this->params[$key] = $val;
}
}
$this->sha256base64_response = str_replace(array('+','/'), array('-','_'), base64_encode(hash("sha256", $decrypted, true)));
}
}
public function val($index)
{
if (isset($this->params[$index])) {
return $this->params[$index];
} else {
return null;
}
}
public function exists($index)
{
if (isset($this->params[$index])) {
return true;
} else {
return false;
}
}
}