Crash when using encryption (null ByteArray cast)

[DigiEggz]

When setting a Zone to "Use Encryption" and attempting to connect, the client crashes.
Client code:

// SmartFox connection
var sfs:SmartFox;
...
// Event listener
sfs.addEventListener(SFSEvent.CRYPTO_INIT, onCryptoInit);
...
// Calling initCrypto to trigger "onCryptoInit" event listener
sfs.initCrypto();
...
// Login to Zone
private function onCryptoInit(evt:SFSEvent)
{
if (evt.params.success)
	sfs.send(new LoginRequest("username", "password", sfs.config.zone));
}

The problem is that using cast to convert an openfl or flash ByteArray to a crypto ByteArray results in a null value. For example, in the encrypt function in DefaultPacketEncrypter, Crypto.getCipher(ALGORITHM, cast ck.key, cast padding); causes a crash because the ck.key cast results in a null.

Called from hxcpp::__hxcpp_main
Called from ApplicationMain::main ApplicationMain.hx line 25
Called from ApplicationMain::create ApplicationMain.hx line 130
Called from lime.app.Application::exec lime/app/Application.hx line 150
Called from lime._internal.backend.native.NativeApplication::exec lime/_internal/backend/native/NativeApplication.hx line 146
Called from lime._internal.backend.native.NativeApplication::handleApplicationEvent lime/_internal/backend/native/NativeApplication.hx line 175
Called from lime.app._Event_Int_Void::dispatch lime/_internal/macros/EventMacro.hx line 91
Called from lime.system.ThreadPool::__update lime/system/ThreadPool.hx line 185
Called from lime.app._Event_Dynamic_Void::dispatch lime/_internal/macros/EventMacro.hx line 91
Called from lime._internal.backend.native.NativeHTTPRequest::multiThreadPool_onProgress lime/_internal/backend/native/NativeHTTPRequest.hx line 570
Called from lime.app.Promise_haxe_io_Bytes::complete lime/app/Promise.hx line 108
Called from lime._internal.backend.native.NativeHTTPRequest::loadText lime/_internal/backend/native/NativeHTTPRequest.hx line 349
Called from lime.app.Promise_String::complete lime/app/Promise.hx line 108
Called from lime.net._HTTPRequest_String::load lime/net/HTTPRequest.hx line 146
Called from lime.app.Promise::complete lime/app/Promise.hx line 108
Called from openfl.net.URLLoader::load openfl/net/URLLoader.hx line 318
Called from openfl.events.EventDispatcher::dispatchEvent openfl/events/EventDispatcher.hx line 246
Called from openfl.events.EventDispatcher::__dispatchEvent openfl/events/EventDispatcher.hx line 402
Called from com.smartfoxserver.v2.util.CryptoInitializer::onHttpResponse com/smartfoxserver/v2/util/CryptoInitializer.hx line 85
Called from openfl.events.EventDispatcher::dispatchEvent openfl/events/EventDispatcher.hx line 246
Called from openfl.events.EventDispatcher::__dispatchEvent openfl/events/EventDispatcher.hx line 402
Called from TitleState::onCryptoInit TitleState.hx line 298
Called from TitleState::selectLogin TitleState.hx line 280
Called from TitleState::sendLogin TitleState.hx line 226
Called from com.smartfoxserver.v2.SmartFox::send com/smartfoxserver/v2/SmartFox.hx line 1888
Error : Null Object Reference