Bug 1461106 - Remove SMTP password from cache when deleted from password manager to prevent stale connection attempts.

Tag #1273

mailnews/build/nsMailModule.cpp

@@ -556,7 +556,7 @@ NS_DEFINE_NAMED_CID(NS_BAYESIANFILTER_CID);
 // compose factories
 ////////////////////////////////////////////////////////////////////////////////
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsSmtpService)
-NS_GENERIC_FACTORY_CONSTRUCTOR(nsSmtpServer)
+NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsSmtpServer, Init)
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsMsgCompose)
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsMsgComposeParams)
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsMsgComposeSendListener)

mailnews/compose/src/nsSmtpServer.cpp

@@ -17,12 +17,14 @@
 #include "nsILoginManager.h"
 #include "nsIArray.h"
 #include "nsArrayUtils.h"
+#include "nsIObserverService.h"
 
 NS_IMPL_ADDREF(nsSmtpServer)
 NS_IMPL_RELEASE(nsSmtpServer)
 NS_INTERFACE_MAP_BEGIN(nsSmtpServer)
     NS_INTERFACE_MAP_ENTRY(nsISmtpServer)
     NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+    NS_INTERFACE_MAP_ENTRY(nsIObserver)
     NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsISmtpServer)
 NS_INTERFACE_MAP_END
 
@@ -37,6 +39,44 @@ nsSmtpServer::~nsSmtpServer()
 {
 }
 
+nsresult nsSmtpServer::Init()
+{
+  // We need to know when the password manager changes.
+  nsCOMPtr<nsIObserverService> observerService =
+           mozilla::services::GetObserverService();
+  NS_ENSURE_TRUE(observerService, NS_ERROR_UNEXPECTED);
+
+  observerService->AddObserver(this, "passwordmgr-storage-changed", false);
+  observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsSmtpServer::Observe(nsISupports *aSubject, const char* aTopic,
+                             const char16_t *aData)
+{
+  // When the state of the password manager changes we need to clear the
+  // password from the cache in case the user just removed it.
+  if (strcmp(aTopic, "passwordmgr-storage-changed") == 0)
+  {
+    m_password.Truncate();
+  }
+  else if (strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID) == 0)
+  {
+    // Now remove ourselves from the observer service as well.
+    nsCOMPtr<nsIObserverService> observerService =
+      mozilla::services::GetObserverService();
+    NS_ENSURE_TRUE(observerService, NS_ERROR_UNEXPECTED);
+
+    observerService->RemoveObserver(this, "passwordmgr-storage-changed");
+    observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
+  }
+
+  return NS_OK;
+}
+
+
 NS_IMETHODIMP
 nsSmtpServer::GetKey(char * *aKey)
 {

mailnews/compose/src/nsSmtpServer.h

@@ -11,15 +11,19 @@
 #include "nsISmtpServer.h"
 #include "nsIPrefBranch.h"
 #include "nsWeakReference.h"
+#include "nsIObserver.h"
 
 class nsSmtpServer : public nsISmtpServer,
-                     public nsSupportsWeakReference
+                     public nsSupportsWeakReference,
+                     public nsIObserver
 {
 public:
     nsSmtpServer();
+    nsresult Init();
     
     NS_DECL_ISUPPORTS
     NS_DECL_NSISMTPSERVER
+    NS_DECL_NSIOBSERVER
 
 private:
     virtual ~nsSmtpServer();