caps/DomainPolicy.cpp
author James Graham <james@hoppipolla.co.uk>
Thu, 05 Sep 2019 18:54:11 +0000
changeset 491901 4fe3084ae3e4ce4f20ebf6c0cf333381ac93a0c8
parent 482194 97c36afd06420842387a5cfcd7073b8b8b7b123b
permissions -rw-r--r--
Bug 1579168 - Fix updating metadata for results that are expected but have known intermittents, r=maja_zf We were assuming that in the case that the status matched expected we'd have no expected entry in the log data. But actually it was being set to None, so handle both those cases. Differential Revision: https://phabricator.services.mozilla.com/D44874

/* -*- 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 "nsIMessageManager.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;
  }

  Maybe<URIParams> uri;
  SerializeURI(aDomain, uri);

  for (uint32_t i = 0; i < parents.Length(); i++) {
    Unused << parents[i]->SendDomainSetChanged(aSetType, aChangeType, uri);
  }
  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<URIParams>& aDomains, nsIDomainSet* aSet) {
  for (uint32_t i = 0; i < aDomains.Length(); i++) {
    nsCOMPtr<nsIURI> uri = DeserializeURI(aDomains[i]);
    aSet->Add(uri);
  }
}

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(EmptyCString())
                    .SetPathQueryRef(EmptyCString())
                    .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.PutEntry(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.RemoveEntry(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<URIParams>* aDomains) {
  for (auto iter = mHashTable.Iter(); !iter.Done(); iter.Next()) {
    nsIURI* key = iter.Get()->GetKey();

    URIParams uri;
    SerializeURI(key, uri);

    aDomains->AppendElement(uri);
  }
}

} /* namespace mozilla */