js: Making objects inmutable

--

* An Object.freeze should stop any malicious third party from changing
  objects' methods once the objects are instantiated (see unittest for
  an approach that would have worked before)
  - An initialized gpgmejs- object doesn't have a '_Keyring' property
    anymore (it still has its 'Keyring')
  - The internal expect='base64' needed to be turned into a method.

1 files changed, 1 insertions, 1 deletions

diff --git a/lang/js/src/Signature.js b/lang/js/src/Signature.js
index 0ee58e94..55131b01 100644
--- a/lang/js/src/Signature.js
+++ b/lang/js/src/Signature.js
@@ -66,7 +66,7 @@ export function createSignature(sigObject){
             }
         }
     }
-    return new GPGME_Signature(sigObject);
+    return Object.freeze(new GPGME_Signature(sigObject));
 }