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4e9cf83ee8
MozReview-Commit-ID: Kdz2xtTF9EG --HG-- extra : rebase_source : 7235b3802f25bab29a8c6ba40a181a722f3df0ce
322 lines
9.9 KiB
C++
322 lines
9.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ThirdPartyUtil.h"
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#include "nsNetCID.h"
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#include "nsNetUtil.h"
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#include "nsIChannel.h"
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#include "nsIServiceManager.h"
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#include "nsIHttpChannelInternal.h"
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#include "nsIDOMWindow.h"
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#include "nsILoadContext.h"
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#include "nsIPrincipal.h"
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#include "nsIScriptObjectPrincipal.h"
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#include "nsIURI.h"
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#include "nsThreadUtils.h"
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#include "mozilla/Logging.h"
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#include "nsPIDOMWindow.h"
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NS_IMPL_ISUPPORTS(ThirdPartyUtil, mozIThirdPartyUtil)
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//
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// MOZ_LOG=thirdPartyUtil:5
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//
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static mozilla::LazyLogModule gThirdPartyLog("thirdPartyUtil");
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#undef LOG
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#define LOG(args) MOZ_LOG(gThirdPartyLog, mozilla::LogLevel::Debug, args)
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nsresult
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ThirdPartyUtil::Init()
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{
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NS_ENSURE_TRUE(NS_IsMainThread(), NS_ERROR_NOT_AVAILABLE);
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nsresult rv;
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mTLDService = do_GetService(NS_EFFECTIVETLDSERVICE_CONTRACTID, &rv);
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return rv;
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}
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// Determine if aFirstDomain is a different base domain to aSecondURI; or, if
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// the concept of base domain does not apply, determine if the two hosts are not
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// string-identical.
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nsresult
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ThirdPartyUtil::IsThirdPartyInternal(const nsCString& aFirstDomain,
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nsIURI* aSecondURI,
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bool* aResult)
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{
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if (!aSecondURI) {
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return NS_ERROR_INVALID_ARG;
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}
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// Get the base domain for aSecondURI.
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nsCString secondDomain;
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nsresult rv = GetBaseDomain(aSecondURI, secondDomain);
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LOG(("ThirdPartyUtil::IsThirdPartyInternal %s =? %s", aFirstDomain.get(), secondDomain.get()));
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if (NS_FAILED(rv))
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return rv;
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// Check strict equality.
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*aResult = aFirstDomain != secondDomain;
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return NS_OK;
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}
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// Get the URI associated with a window.
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NS_IMETHODIMP
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ThirdPartyUtil::GetURIFromWindow(mozIDOMWindowProxy* aWin, nsIURI** result)
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{
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nsresult rv;
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nsCOMPtr<nsIScriptObjectPrincipal> scriptObjPrin = do_QueryInterface(aWin);
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if (!scriptObjPrin) {
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return NS_ERROR_INVALID_ARG;
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}
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nsIPrincipal* prin = scriptObjPrin->GetPrincipal();
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if (!prin) {
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return NS_ERROR_INVALID_ARG;
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}
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if (prin->GetIsNullPrincipal()) {
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LOG(("ThirdPartyUtil::GetURIFromWindow can't use null principal\n"));
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return NS_ERROR_INVALID_ARG;
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}
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rv = prin->GetURI(result);
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return rv;
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}
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// Determine if aFirstURI is third party with respect to aSecondURI. See docs
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// for mozIThirdPartyUtil.
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NS_IMETHODIMP
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ThirdPartyUtil::IsThirdPartyURI(nsIURI* aFirstURI,
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nsIURI* aSecondURI,
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bool* aResult)
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{
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NS_ENSURE_ARG(aFirstURI);
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NS_ENSURE_ARG(aSecondURI);
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NS_ASSERTION(aResult, "null outparam pointer");
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nsCString firstHost;
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nsresult rv = GetBaseDomain(aFirstURI, firstHost);
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if (NS_FAILED(rv))
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return rv;
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return IsThirdPartyInternal(firstHost, aSecondURI, aResult);
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}
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// Determine if any URI of the window hierarchy of aWindow is foreign with
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// respect to aSecondURI. See docs for mozIThirdPartyUtil.
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NS_IMETHODIMP
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ThirdPartyUtil::IsThirdPartyWindow(mozIDOMWindowProxy* aWindow,
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nsIURI* aURI,
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bool* aResult)
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{
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NS_ENSURE_ARG(aWindow);
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NS_ASSERTION(aResult, "null outparam pointer");
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bool result;
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// Get the URI of the window, and its base domain.
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nsresult rv;
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nsCOMPtr<nsIURI> currentURI;
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rv = GetURIFromWindow(aWindow, getter_AddRefs(currentURI));
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if (NS_FAILED(rv))
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return rv;
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nsCString bottomDomain;
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rv = GetBaseDomain(currentURI, bottomDomain);
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if (NS_FAILED(rv))
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return rv;
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if (aURI) {
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// Determine whether aURI is foreign with respect to currentURI.
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rv = IsThirdPartyInternal(bottomDomain, aURI, &result);
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if (NS_FAILED(rv))
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return rv;
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if (result) {
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*aResult = true;
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return NS_OK;
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}
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}
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nsCOMPtr<nsPIDOMWindowOuter> current = nsPIDOMWindowOuter::From(aWindow), parent;
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nsCOMPtr<nsIURI> parentURI;
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do {
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// We use GetScriptableParent rather than GetParent because we consider
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// <iframe mozbrowser> to be a top-level frame.
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parent = current->GetScriptableParent();
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if (SameCOMIdentity(parent, current)) {
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// We're at the topmost content window. We already know the answer.
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*aResult = false;
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return NS_OK;
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}
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rv = GetURIFromWindow(parent, getter_AddRefs(parentURI));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = IsThirdPartyInternal(bottomDomain, parentURI, &result);
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if (NS_FAILED(rv))
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return rv;
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if (result) {
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*aResult = true;
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return NS_OK;
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}
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current = parent;
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currentURI = parentURI;
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} while (1);
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NS_NOTREACHED("should've returned");
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return NS_ERROR_UNEXPECTED;
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}
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// Determine if the URI associated with aChannel or any URI of the window
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// hierarchy associated with the channel is foreign with respect to aSecondURI.
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// See docs for mozIThirdPartyUtil.
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NS_IMETHODIMP
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ThirdPartyUtil::IsThirdPartyChannel(nsIChannel* aChannel,
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nsIURI* aURI,
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bool* aResult)
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{
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LOG(("ThirdPartyUtil::IsThirdPartyChannel [channel=%p]", aChannel));
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NS_ENSURE_ARG(aChannel);
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NS_ASSERTION(aResult, "null outparam pointer");
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nsresult rv;
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bool doForce = false;
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nsCOMPtr<nsIHttpChannelInternal> httpChannelInternal =
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do_QueryInterface(aChannel);
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if (httpChannelInternal) {
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uint32_t flags;
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rv = httpChannelInternal->GetThirdPartyFlags(&flags);
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NS_ENSURE_SUCCESS(rv, rv);
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doForce = (flags & nsIHttpChannelInternal::THIRD_PARTY_FORCE_ALLOW);
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// If aURI was not supplied, and we're forcing, then we're by definition
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// not foreign. If aURI was supplied, we still want to check whether it's
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// foreign with respect to the channel URI. (The forcing only applies to
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// whatever window hierarchy exists above the channel.)
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if (doForce && !aURI) {
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*aResult = false;
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return NS_OK;
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}
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}
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bool parentIsThird = false;
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// Obtain the URI from the channel, and its base domain.
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nsCOMPtr<nsIURI> channelURI;
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rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(channelURI));
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if (NS_FAILED(rv))
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return rv;
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nsCString channelDomain;
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rv = GetBaseDomain(channelURI, channelDomain);
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if (NS_FAILED(rv))
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return rv;
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if (!doForce) {
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if (nsCOMPtr<nsILoadInfo> loadInfo = aChannel->GetLoadInfo()) {
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parentIsThird = loadInfo->GetIsInThirdPartyContext();
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if (!parentIsThird &&
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loadInfo->GetExternalContentPolicyType() != nsIContentPolicy::TYPE_DOCUMENT) {
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// Check if the channel itself is third-party to its own requestor.
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// Unforunately, we have to go through the loading principal.
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nsCOMPtr<nsIURI> parentURI;
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loadInfo->LoadingPrincipal()->GetURI(getter_AddRefs(parentURI));
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rv = IsThirdPartyInternal(channelDomain, parentURI, &parentIsThird);
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if (NS_FAILED(rv))
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return rv;
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}
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} else {
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NS_WARNING("Found channel with no loadinfo, assuming third-party request");
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parentIsThird = true;
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}
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}
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// If we're not comparing to a URI, we have our answer. Otherwise, if
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// parentIsThird, we're not forcing and we know that we're a third-party
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// request.
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if (!aURI || parentIsThird) {
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*aResult = parentIsThird;
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return NS_OK;
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}
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// Determine whether aURI is foreign with respect to channelURI.
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return IsThirdPartyInternal(channelDomain, aURI, aResult);
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}
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NS_IMETHODIMP
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ThirdPartyUtil::GetTopWindowForChannel(nsIChannel* aChannel, mozIDOMWindowProxy** aWin)
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{
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NS_ENSURE_ARG(aWin);
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// Find the associated window and its parent window.
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nsCOMPtr<nsILoadContext> ctx;
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NS_QueryNotificationCallbacks(aChannel, ctx);
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if (!ctx) {
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return NS_ERROR_INVALID_ARG;
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}
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nsCOMPtr<mozIDOMWindowProxy> window;
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ctx->GetAssociatedWindow(getter_AddRefs(window));
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if (!window) {
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return NS_ERROR_INVALID_ARG;
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}
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nsCOMPtr<nsPIDOMWindowOuter> top = nsPIDOMWindowOuter::From(window)->GetTop();
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top.forget(aWin);
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return NS_OK;
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}
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// Get the base domain for aHostURI; e.g. for "www.bbc.co.uk", this would be
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// "bbc.co.uk". Only properly-formed URI's are tolerated, though a trailing
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// dot may be present. If aHostURI is an IP address, an alias such as
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// 'localhost', an eTLD such as 'co.uk', or the empty string, aBaseDomain will
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// be the exact host. The result of this function should only be used in exact
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// string comparisons, since substring comparisons will not be valid for the
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// special cases elided above.
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NS_IMETHODIMP
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ThirdPartyUtil::GetBaseDomain(nsIURI* aHostURI,
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nsACString& aBaseDomain)
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{
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if (!aHostURI) {
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return NS_ERROR_INVALID_ARG;
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}
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// Get the base domain. this will fail if the host contains a leading dot,
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// more than one trailing dot, or is otherwise malformed.
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nsresult rv = mTLDService->GetBaseDomain(aHostURI, 0, aBaseDomain);
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if (rv == NS_ERROR_HOST_IS_IP_ADDRESS ||
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rv == NS_ERROR_INSUFFICIENT_DOMAIN_LEVELS) {
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// aHostURI is either an IP address, an alias such as 'localhost', an eTLD
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// such as 'co.uk', or the empty string. Uses the normalized host in such
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// cases.
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rv = aHostURI->GetAsciiHost(aBaseDomain);
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}
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NS_ENSURE_SUCCESS(rv, rv);
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// aHostURI (and thus aBaseDomain) may be the string '.'. If so, fail.
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if (aBaseDomain.Length() == 1 && aBaseDomain.Last() == '.')
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return NS_ERROR_INVALID_ARG;
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// Reject any URIs without a host that aren't file:// URIs. This makes it the
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// only way we can get a base domain consisting of the empty string, which
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// means we can safely perform foreign tests on such URIs where "not foreign"
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// means "the involved URIs are all file://".
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if (aBaseDomain.IsEmpty()) {
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bool isFileURI = false;
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aHostURI->SchemeIs("file", &isFileURI);
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if (!isFileURI) {
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return NS_ERROR_INVALID_ARG;
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}
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}
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return NS_OK;
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}
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