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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "UrlClassifierFeatureFlash.h"
#include "mozilla/net/HttpBaseChannel.h"
#include "mozilla/StaticPrefs_plugins.h"
#include "nsIXULRuntime.h"
#include "nsScriptSecurityManager.h"
#include "nsQueryObject.h"
namespace mozilla {
namespace net {
struct UrlClassifierFeatureFlash::FlashFeature {
const char* mName;
const char* mBlocklistPrefTables;
const char* mEntitylistPrefTables;
bool mSubdocumentOnly;
nsIHttpChannel::FlashPluginState mFlashPluginState;
RefPtr<UrlClassifierFeatureFlash> mFeature;
};
namespace {
static UrlClassifierFeatureFlash::FlashFeature sFlashFeaturesMap[] = {
{"flash-deny", "urlclassifier.flashTable", "urlclassifier.flashExceptTable",
false, nsIHttpChannel::FlashPluginDenied},
{"flash-allow", "urlclassifier.flashAllowTable",
"urlclassifier.flashAllowExceptTable", false,
nsIHttpChannel::FlashPluginAllowed},
{"flash-deny-subdoc", "urlclassifier.flashSubDocTable",
"urlclassifier.flashSubDocExceptTable", true,
nsIHttpChannel::FlashPluginDeniedInSubdocuments},
};
bool IsInitialized() { return !!sFlashFeaturesMap[0].mFeature; }
} // namespace
UrlClassifierFeatureFlash::UrlClassifierFeatureFlash(
const UrlClassifierFeatureFlash::FlashFeature& aFlashFeature)
: UrlClassifierFeatureBase(
nsDependentCString(aFlashFeature.mName),
nsDependentCString(aFlashFeature.mBlocklistPrefTables),
nsDependentCString(aFlashFeature.mEntitylistPrefTables),
""_ns, // aPrefBlocklistHosts
""_ns, // aPrefEntitylistHosts
""_ns, // aPrefBlocklistTableName
""_ns, // aPrefEntitylistTableName
""_ns) // aPrefExceptionHosts
,
mFlashPluginState(aFlashFeature.mFlashPluginState) {
static_assert(nsIHttpChannel::FlashPluginDeniedInSubdocuments ==
nsIHttpChannel::FlashPluginLastValue,
"nsIHttpChannel::FlashPluginLastValue is out-of-sync!");
}
/* static */
void UrlClassifierFeatureFlash::GetFeatureNames(nsTArray<nsCString>& aArray) {
for (const FlashFeature& flashFeature : sFlashFeaturesMap) {
aArray.AppendElement(nsDependentCString(flashFeature.mName));
}
}
/* static */
void UrlClassifierFeatureFlash::MaybeInitialize() {
MOZ_ASSERT(XRE_IsParentProcess());
if (IsInitialized()) {
return;
}
for (FlashFeature& flashFeature : sFlashFeaturesMap) {
MOZ_ASSERT(!flashFeature.mFeature);
flashFeature.mFeature = new UrlClassifierFeatureFlash(flashFeature);
flashFeature.mFeature->InitializePreferences();
}
}
/* static */
void UrlClassifierFeatureFlash::MaybeShutdown() {
if (!IsInitialized()) {
return;
}
for (FlashFeature& flashFeature : sFlashFeaturesMap) {
MOZ_ASSERT(flashFeature.mFeature);
flashFeature.mFeature->ShutdownPreferences();
flashFeature.mFeature = nullptr;
}
}
/* static */
void UrlClassifierFeatureFlash::MaybeCreate(
nsIChannel* aChannel,
nsTArray<nsCOMPtr<nsIUrlClassifierFeature>>& aFeatures) {
const auto fnIsFlashBlockingEnabled = [] {
return StaticPrefs::plugins_flashBlock_enabled() && !FissionAutostart();
};
// All disabled.
if (!fnIsFlashBlockingEnabled()) {
return;
}
// We use Flash feature just for document loading.
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
ExtContentPolicyType contentPolicyType =
loadInfo->GetExternalContentPolicyType();
if (contentPolicyType != ExtContentPolicy::TYPE_DOCUMENT &&
contentPolicyType != ExtContentPolicy::TYPE_SUBDOCUMENT) {
return;
}
// Only allow plugins for documents from an HTTP/HTTPS origin.
if (StaticPrefs::plugins_http_https_only()) {
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel);
if (!httpChannel) {
return;
}
}
MaybeInitialize();
for (const FlashFeature& flashFeature : sFlashFeaturesMap) {
MOZ_ASSERT(flashFeature.mFeature);
if (!flashFeature.mSubdocumentOnly ||
contentPolicyType == ExtContentPolicy::TYPE_SUBDOCUMENT) {
aFeatures.AppendElement(flashFeature.mFeature);
}
}
}
/* static */
already_AddRefed<nsIUrlClassifierFeature>
UrlClassifierFeatureFlash::GetIfNameMatches(const nsACString& aName) {
MaybeInitialize();
for (const FlashFeature& flashFeature : sFlashFeaturesMap) {
MOZ_ASSERT(flashFeature.mFeature);
if (aName.Equals(flashFeature.mName)) {
nsCOMPtr<nsIUrlClassifierFeature> self = flashFeature.mFeature.get();
return self.forget();
}
}
return nullptr;
}
NS_IMETHODIMP
UrlClassifierFeatureFlash::ProcessChannel(nsIChannel* aChannel,
const nsTArray<nsCString>& aList,
const nsTArray<nsCString>& aHashes,
bool* aShouldContinue) {
NS_ENSURE_ARG_POINTER(aChannel);
NS_ENSURE_ARG_POINTER(aShouldContinue);
// This is not a blocking feature.
*aShouldContinue = true;
UC_LOG(("UrlClassifierFeatureFlash::ProcessChannel - annotating channel %p",
aChannel));
nsCOMPtr<nsIParentChannel> parentChannel;
NS_QueryNotificationCallbacks(aChannel, parentChannel);
if (parentChannel) {
// This channel is a parent-process proxy for a child process
// request. We should notify the child process as well.
parentChannel->NotifyFlashPluginStateChanged(mFlashPluginState);
}
RefPtr<HttpBaseChannel> httpChannel = do_QueryObject(aChannel);
if (httpChannel) {
httpChannel->SetFlashPluginState(mFlashPluginState);
}
return NS_OK;
}
NS_IMETHODIMP
UrlClassifierFeatureFlash::GetURIByListType(
nsIChannel* aChannel, nsIUrlClassifierFeature::listType aListType,
nsIUrlClassifierFeature::URIType* aURIType, nsIURI** aURI) {
NS_ENSURE_ARG_POINTER(aChannel);
NS_ENSURE_ARG_POINTER(aURIType);
NS_ENSURE_ARG_POINTER(aURI);
// Here we return the channel's URI always.
*aURIType = aListType == nsIUrlClassifierFeature::blocklist
? nsIUrlClassifierFeature::URIType::blocklistURI
: nsIUrlClassifierFeature::URIType::entitylistURI;
return aChannel->GetURI(aURI);
}
} // namespace net
} // namespace mozilla
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