From 5125ca9fad2086969033c8170a00b6d081ab197e Mon Sep 17 00:00:00 2001
From: William Chen <wchen@mozilla.com>
Date: Mon, 18 Mar 2013 06:24:53 -0700
Subject: [PATCH] Bug 782211 - Part 4: Add function to remote test for
 permission in nsIPermissionManager. r=cjones

---
 dom/ipc/ContentParent.cpp | 17 +++++++++++++++++
 dom/ipc/ContentParent.h   |  4 ++++
 dom/ipc/PContent.ipdl     | 16 ++++++++++++++++
 3 files changed, 37 insertions(+)

diff --git a/dom/ipc/ContentParent.cpp b/dom/ipc/ContentParent.cpp
index e0198eb0c15b..a8e53dfdfeae 100644
--- a/dom/ipc/ContentParent.cpp
+++ b/dom/ipc/ContentParent.cpp
@@ -2272,6 +2272,23 @@ ContentParent::RecvCloseAlert(const nsString& aName)
     return true;
 }
 
+bool
+ContentParent::RecvTestPermissionFromPrincipal(const IPC::Principal& aPrincipal,
+                                               const nsCString& aType,
+                                               uint32_t* permission)
+{
+    nsCOMPtr<nsIPermissionManager> permissionManager =
+        do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
+    NS_ENSURE_TRUE(permissionManager, false);
+
+    nsresult rv = permissionManager->TestPermissionFromPrincipal(aPrincipal,
+                                                                 aType.get(),
+                                                                 permission);
+    NS_ENSURE_SUCCESS(rv, false);
+
+    return true;
+}
+
 bool
 ContentParent::RecvSyncMessage(const nsString& aMsg,
                                const ClonedMessageData& aData,
diff --git a/dom/ipc/ContentParent.h b/dom/ipc/ContentParent.h
index 4a3481272970..4fca19c320ed 100644
--- a/dom/ipc/ContentParent.h
+++ b/dom/ipc/ContentParent.h
@@ -333,6 +333,10 @@ private:
 
     virtual bool RecvCloseAlert(const nsString& aName);
 
+    virtual bool RecvTestPermissionFromPrincipal(const IPC::Principal& aPrincipal,
+                                                 const nsCString& aType,
+                                                 uint32_t* permission);
+
     virtual bool RecvLoadURIExternal(const URIParams& uri);
 
     virtual bool RecvSyncMessage(const nsString& aMsg,
diff --git a/dom/ipc/PContent.ipdl b/dom/ipc/PContent.ipdl
index ed7e4b479587..bad54717e07d 100644
--- a/dom/ipc/PContent.ipdl
+++ b/dom/ipc/PContent.ipdl
@@ -433,6 +433,22 @@ parent:
 
     CloseAlert(nsString name);
 
+    /**
+     * Tests permission for a provided principal using the permission
+     * manager.
+     *
+     * @param principal
+     *   The principal to test for the permissions.
+     * @param type
+     *   The type of permission to for the principal.
+     *
+     * NOTE: The principal is untrusted in the parent process. Only
+     *       principals that can live in the content process should
+     *       be provided.
+     */
+    sync TestPermissionFromPrincipal(Principal principal, nsCString type)
+        returns (uint32_t permission);
+
     PExternalHelperApp(OptionalURIParams uri, nsCString aMimeContentType,
                        nsCString aContentDisposition, bool aForceSave,
                        int64_t aContentLength, OptionalURIParams aReferrer);