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This commit is contained in:
Lukas Reschke 2015-09-08 21:28:15 +02:00
parent 73d3839962
commit a03422c55a
1 changed files with 8 additions and 1 deletions
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9
lib/private/util.php
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@ -1054,6 +1054,7 @@ class OC_Util {
return $id;
}
protected static $encryptedToken;
/**
* Register an get/post call. Important to prevent CSRF attacks.
*
@ -1066,6 +1067,11 @@ class OC_Util {
* @see OC_Util::isCallRegistered()
*/
public static function callRegister() {
// Use existing token if function has already been called
if(isset(self::$encryptedToken)) {
return self::$encryptedToken;
}
// Check if a token exists
if (!\OC::$server->getSession()->exists('requesttoken')) {
// No valid token found, generate a new one.
@ -1078,7 +1084,8 @@ class OC_Util {
// Encrypt the token to mitigate breach-like attacks
$sharedSecret = \OC::$server->getSecureRandom()->getMediumStrengthGenerator()->generate(10);
return \OC::$server->getCrypto()->encrypt($requestToken, $sharedSecret) . ':' . $sharedSecret;
self::$encryptedToken = \OC::$server->getCrypto()->encrypt($requestToken, $sharedSecret) . ':' . $sharedSecret;
return self::$encryptedToken;
}
/**