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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=4 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 "DomainPolicy.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/ipc/URIUtils.h"
#include "mozilla/Unused.h"
#include "nsIURIMutator.h"
#include "nsScriptSecurityManager.h"
namespace mozilla {
using namespace ipc;
using namespace dom;
NS_IMPL_ISUPPORTS(DomainPolicy, nsIDomainPolicy)
static nsresult BroadcastDomainSetChange(DomainSetType aSetType,
DomainSetChangeType aChangeType,
nsIURI* aDomain = nullptr) {
MOZ_ASSERT(XRE_IsParentProcess(),
"DomainPolicy should only be exposed to the chrome process.");
nsTArray<ContentParent*> parents;
ContentParent::GetAll(parents);
if (!parents.Length()) {
return NS_OK;
}
for (uint32_t i = 0; i < parents.Length(); i++) {
Unused << parents[i]->SendDomainSetChanged(aSetType, aChangeType, aDomain);
}
return NS_OK;
}
DomainPolicy::DomainPolicy()
: mBlocklist(new DomainSet(BLOCKLIST)),
mSuperBlocklist(new DomainSet(SUPER_BLOCKLIST)),
mAllowlist(new DomainSet(ALLOWLIST)),
mSuperAllowlist(new DomainSet(SUPER_ALLOWLIST)) {
if (XRE_IsParentProcess()) {
BroadcastDomainSetChange(NO_TYPE, ACTIVATE_POLICY);
}
}
DomainPolicy::~DomainPolicy() {
// The SSM holds a strong ref to the DomainPolicy until Deactivate() is
// invoked, so we should never hit the destructor until that happens.
MOZ_ASSERT(!mBlocklist && !mSuperBlocklist && !mAllowlist &&
!mSuperAllowlist);
}
NS_IMETHODIMP
DomainPolicy::GetBlocklist(nsIDomainSet** aSet) {
nsCOMPtr<nsIDomainSet> set = mBlocklist.get();
set.forget(aSet);
return NS_OK;
}
NS_IMETHODIMP
DomainPolicy::GetSuperBlocklist(nsIDomainSet** aSet) {
nsCOMPtr<nsIDomainSet> set = mSuperBlocklist.get();
set.forget(aSet);
return NS_OK;
}
NS_IMETHODIMP
DomainPolicy::GetAllowlist(nsIDomainSet** aSet) {
nsCOMPtr<nsIDomainSet> set = mAllowlist.get();
set.forget(aSet);
return NS_OK;
}
NS_IMETHODIMP
DomainPolicy::GetSuperAllowlist(nsIDomainSet** aSet) {
nsCOMPtr<nsIDomainSet> set = mSuperAllowlist.get();
set.forget(aSet);
return NS_OK;
}
NS_IMETHODIMP
DomainPolicy::Deactivate() {
// Clear the hashtables first to free up memory, since script might
// hold the doomed sets alive indefinitely.
mBlocklist->Clear();
mSuperBlocklist->Clear();
mAllowlist->Clear();
mSuperAllowlist->Clear();
// Null them out.
mBlocklist = nullptr;
mSuperBlocklist = nullptr;
mAllowlist = nullptr;
mSuperAllowlist = nullptr;
// Inform the SSM.
nsScriptSecurityManager* ssm =
nsScriptSecurityManager::GetScriptSecurityManager();
if (ssm) {
ssm->DeactivateDomainPolicy();
}
if (XRE_IsParentProcess()) {
BroadcastDomainSetChange(NO_TYPE, DEACTIVATE_POLICY);
}
return NS_OK;
}
void DomainPolicy::CloneDomainPolicy(DomainPolicyClone* aClone) {
aClone->active() = true;
mBlocklist->CloneSet(&aClone->blocklist());
mSuperBlocklist->CloneSet(&aClone->superBlocklist());
mAllowlist->CloneSet(&aClone->allowlist());
mSuperAllowlist->CloneSet(&aClone->superAllowlist());
}
static void CopyURIs(const nsTArray<RefPtr<nsIURI>>& aDomains,
nsIDomainSet* aSet) {
for (uint32_t i = 0; i < aDomains.Length(); i++) {
if (NS_WARN_IF(!aDomains[i])) {
continue;
}
aSet->Add(aDomains[i]);
}
}
void DomainPolicy::ApplyClone(const DomainPolicyClone* aClone) {
CopyURIs(aClone->blocklist(), mBlocklist);
CopyURIs(aClone->allowlist(), mAllowlist);
CopyURIs(aClone->superBlocklist(), mSuperBlocklist);
CopyURIs(aClone->superAllowlist(), mSuperAllowlist);
}
static already_AddRefed<nsIURI> GetCanonicalClone(nsIURI* aURI) {
nsCOMPtr<nsIURI> clone;
nsresult rv =
NS_MutateURI(aURI).SetUserPass(""_ns).SetPathQueryRef(""_ns).Finalize(
clone);
NS_ENSURE_SUCCESS(rv, nullptr);
return clone.forget();
}
NS_IMPL_ISUPPORTS(DomainSet, nsIDomainSet)
NS_IMETHODIMP
DomainSet::Add(nsIURI* aDomain) {
nsCOMPtr<nsIURI> clone = GetCanonicalClone(aDomain);
NS_ENSURE_TRUE(clone, NS_ERROR_FAILURE);
mHashTable.Insert(clone);
if (XRE_IsParentProcess()) {
return BroadcastDomainSetChange(mType, ADD_DOMAIN, aDomain);
}
return NS_OK;
}
NS_IMETHODIMP
DomainSet::Remove(nsIURI* aDomain) {
nsCOMPtr<nsIURI> clone = GetCanonicalClone(aDomain);
NS_ENSURE_TRUE(clone, NS_ERROR_FAILURE);
mHashTable.Remove(clone);
if (XRE_IsParentProcess()) {
return BroadcastDomainSetChange(mType, REMOVE_DOMAIN, aDomain);
}
return NS_OK;
}
NS_IMETHODIMP
DomainSet::Clear() {
mHashTable.Clear();
if (XRE_IsParentProcess()) {
return BroadcastDomainSetChange(mType, CLEAR_DOMAINS);
}
return NS_OK;
}
NS_IMETHODIMP
DomainSet::Contains(nsIURI* aDomain, bool* aContains) {
*aContains = false;
nsCOMPtr<nsIURI> clone = GetCanonicalClone(aDomain);
NS_ENSURE_TRUE(clone, NS_ERROR_FAILURE);
*aContains = mHashTable.Contains(clone);
return NS_OK;
}
NS_IMETHODIMP
DomainSet::ContainsSuperDomain(nsIURI* aDomain, bool* aContains) {
*aContains = false;
nsCOMPtr<nsIURI> clone = GetCanonicalClone(aDomain);
NS_ENSURE_TRUE(clone, NS_ERROR_FAILURE);
nsAutoCString domain;
nsresult rv = clone->GetHost(domain);
NS_ENSURE_SUCCESS(rv, rv);
while (true) {
// Check the current domain.
if (mHashTable.Contains(clone)) {
*aContains = true;
return NS_OK;
}
// Chop off everything before the first dot, or break if there are no
// dots left.
int32_t index = domain.Find(".");
if (index == kNotFound) break;
domain.Assign(Substring(domain, index + 1));
rv = NS_MutateURI(clone).SetHost(domain).Finalize(clone);
NS_ENSURE_SUCCESS(rv, rv);
}
// No match.
return NS_OK;
}
void DomainSet::CloneSet(nsTArray<RefPtr<nsIURI>>* aDomains) {
AppendToArray(*aDomains, mHashTable);
}
} /* namespace mozilla */
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