src: fix Get() usage in tls_wrap.cc

PR-URL: #24060
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

Author: cjihrig

src/tls_wrap.cc

@@ -213,17 +213,22 @@ void TLSWrap::SSLInfoCallback(const SSL* ssl_, int where, int ret) {
   Local<Object> object = c->object();
 
   if (where & SSL_CB_HANDSHAKE_START) {
-    Local<Value> callback = object->Get(env->onhandshakestart_string());
-    if (callback->IsFunction()) {
+    Local<Value> callback;
+
+    if (object->Get(env->context(), env->onhandshakestart_string())
+          .ToLocal(&callback) && callback->IsFunction()) {
       Local<Value> argv[] = { env->GetNow() };
       c->MakeCallback(callback.As<Function>(), arraysize(argv), argv);
     }
   }
 
   if (where & SSL_CB_HANDSHAKE_DONE) {
+    Local<Value> callback;
+
     c->established_ = true;
-    Local<Value> callback = object->Get(env->onhandshakedone_string());
-    if (callback->IsFunction()) {
+
+    if (object->Get(env->context(), env->onhandshakedone_string())
+          .ToLocal(&callback) && callback->IsFunction()) {
       c->MakeCallback(callback.As<Function>(), 0, nullptr);
     }
   }
@@ -814,7 +819,10 @@ int TLSWrap::SelectSNIContextCallback(SSL* s, int* ad, void* arg) {
 
   // Call the SNI callback and use its return value as context
   Local<Object> object = p->object();
-  Local<Value> ctx = object->Get(env->sni_context_string());
+  Local<Value> ctx;
+
+  if (!object->Get(env->context(), env->sni_context_string()).ToLocal(&ctx))
+    return SSL_TLSEXT_ERR_NOACK;
 
   // Not an object, probably undefined or null
   if (!ctx->IsObject())