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Bug 1340333 - Eagerly compute whether a frame is really a browser.

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Tag #1375
This commit is contained in:
Matt A. Tobin 2020-04-16 16:41:20 -04:00 • committed by Roy Tam
commit 69139427d5
2 changed files with 19 additions and 22 deletions
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39
dom/html/nsGenericHTMLFrameElement.cpp
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@ -399,6 +399,17 @@ nsGenericHTMLFrameElement::MapScrollingAttribute(const nsAttrValue* aValue)
return mappedValue;
}
static bool
PrincipalAllowsBrowserFrame(nsIPrincipal* aPrincipal)
{
nsCOMPtr<nsIPermissionManager> permMgr = mozilla::services::GetPermissionManager();
NS_ENSURE_TRUE(permMgr, false);
uint32_t permission = nsIPermissionManager::DENY_ACTION;
nsresult rv = permMgr->TestPermissionFromPrincipal(aPrincipal, "browser", &permission);
NS_ENSURE_SUCCESS(rv, false);
return permission == nsIPermissionManager::ALLOW_ACTION;
}
/* virtual */ nsresult
nsGenericHTMLFrameElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
const nsAttrValue* aValue,
@ -428,6 +439,11 @@ nsGenericHTMLFrameElement::AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
}
}
if (aName == nsGkAtoms::mozbrowser && aNameSpaceID == kNameSpaceID_None) {
mReallyIsBrowser = !!aValue && BrowserFramesEnabled() &&
PrincipalAllowsBrowserFrame(NodePrincipal());
}
return nsGenericHTMLElement::AfterSetAttr(aNameSpaceID, aName, aValue,
aNotify);
}
@ -503,28 +519,7 @@ nsGenericHTMLFrameElement::BrowserFramesEnabled()
/* [infallible] */ nsresult
nsGenericHTMLFrameElement::GetReallyIsBrowserOrApp(bool *aOut)
{
*aOut = false;
// Fail if browser frames are globally disabled.
if (!nsGenericHTMLFrameElement::BrowserFramesEnabled()) {
return NS_OK;
}
// Fail if this frame doesn't have the mozbrowser attribute.
if (!GetBoolAttr(nsGkAtoms::mozbrowser)) {
return NS_OK;
}
// Fail if the node principal isn't trusted.
nsIPrincipal *principal = NodePrincipal();
nsCOMPtr<nsIPermissionManager> permMgr =
services::GetPermissionManager();
NS_ENSURE_TRUE(permMgr, NS_OK);
uint32_t permission = nsIPermissionManager::DENY_ACTION;
nsresult rv = permMgr->TestPermissionFromPrincipal(principal, "browser", &permission);
NS_ENSURE_SUCCESS(rv, NS_OK);
*aOut = permission == nsIPermissionManager::ALLOW_ACTION;
*aOut = mReallyIsBrowser;
return NS_OK;
}