зеркало из https://github.com/mozilla/gecko-dev.git
312 строки
7.9 KiB
C++
312 строки
7.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 sw=2 et 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 "ExpandedPrincipal.h"
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#include "nsIClassInfoImpl.h"
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using namespace mozilla;
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NS_IMPL_CLASSINFO(ExpandedPrincipal, nullptr, nsIClassInfo::MAIN_THREAD_ONLY,
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NS_EXPANDEDPRINCIPAL_CID)
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NS_IMPL_QUERY_INTERFACE_CI(ExpandedPrincipal,
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nsIPrincipal,
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nsIExpandedPrincipal,
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nsISerializable)
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NS_IMPL_CI_INTERFACE_GETTER(ExpandedPrincipal,
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nsIPrincipal,
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nsIExpandedPrincipal,
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nsISerializable)
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struct OriginComparator
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{
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bool LessThan(nsIPrincipal* a, nsIPrincipal* b) const
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{
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nsAutoCString originA;
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DebugOnly<nsresult> rv = a->GetOrigin(originA);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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nsAutoCString originB;
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rv = b->GetOrigin(originB);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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return originA < originB;
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}
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bool Equals(nsIPrincipal* a, nsIPrincipal* b) const
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{
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nsAutoCString originA;
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DebugOnly<nsresult> rv = a->GetOrigin(originA);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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nsAutoCString originB;
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rv = b->GetOrigin(originB);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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return a == b;
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}
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};
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ExpandedPrincipal::ExpandedPrincipal(nsTArray<nsCOMPtr<nsIPrincipal>> &aWhiteList)
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: BasePrincipal(eExpandedPrincipal)
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{
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// We force the principals to be sorted by origin so that ExpandedPrincipal
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// origins can have a canonical form.
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OriginComparator c;
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for (size_t i = 0; i < aWhiteList.Length(); ++i) {
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mPrincipals.InsertElementSorted(aWhiteList[i], c);
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}
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}
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ExpandedPrincipal::ExpandedPrincipal()
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: BasePrincipal(eExpandedPrincipal)
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{
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}
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ExpandedPrincipal::~ExpandedPrincipal()
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{ }
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already_AddRefed<ExpandedPrincipal>
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ExpandedPrincipal::Create(nsTArray<nsCOMPtr<nsIPrincipal>>& aWhiteList,
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const OriginAttributes& aAttrs)
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{
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RefPtr<ExpandedPrincipal> ep = new ExpandedPrincipal(aWhiteList);
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nsAutoCString origin;
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origin.AssignLiteral("[Expanded Principal [");
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for (size_t i = 0; i < ep->mPrincipals.Length(); ++i) {
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if (i != 0) {
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origin.AppendLiteral(", ");
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}
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nsAutoCString subOrigin;
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DebugOnly<nsresult> rv = ep->mPrincipals.ElementAt(i)->GetOrigin(subOrigin);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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origin.Append(subOrigin);
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}
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origin.AppendLiteral("]]");
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ep->FinishInit(origin, aAttrs);
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return ep.forget();
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}
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NS_IMETHODIMP
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ExpandedPrincipal::GetDomain(nsIURI** aDomain)
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{
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*aDomain = nullptr;
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return NS_OK;
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}
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NS_IMETHODIMP
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ExpandedPrincipal::SetDomain(nsIURI* aDomain)
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{
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return NS_OK;
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}
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bool
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ExpandedPrincipal::SubsumesInternal(nsIPrincipal* aOther,
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BasePrincipal::DocumentDomainConsideration aConsideration)
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{
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// If aOther is an ExpandedPrincipal too, we break it down into its component
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// nsIPrincipals, and check subsumes on each one.
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if (Cast(aOther)->Is<ExpandedPrincipal>()) {
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auto* expanded = Cast(aOther)->As<ExpandedPrincipal>();
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for (auto& other : expanded->WhiteList()) {
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// Use SubsumesInternal rather than Subsumes here, since OriginAttribute
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// checks are only done between non-expanded sub-principals, and we don't
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// need to incur the extra virtual call overhead.
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if (!SubsumesInternal(other, aConsideration)) {
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return false;
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}
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}
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return true;
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}
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// We're dealing with a regular principal. One of our principals must subsume
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// it.
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for (uint32_t i = 0; i < mPrincipals.Length(); ++i) {
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if (Cast(mPrincipals[i])->Subsumes(aOther, aConsideration)) {
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return true;
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}
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}
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return false;
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}
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bool
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ExpandedPrincipal::MayLoadInternal(nsIURI* uri)
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{
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for (uint32_t i = 0; i < mPrincipals.Length(); ++i){
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if (BasePrincipal::Cast(mPrincipals[i])->MayLoadInternal(uri)) {
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return true;
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}
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}
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return false;
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}
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NS_IMETHODIMP
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ExpandedPrincipal::GetHashValue(uint32_t* result)
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{
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MOZ_CRASH("extended principal should never be used as key in a hash map");
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}
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NS_IMETHODIMP
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ExpandedPrincipal::GetURI(nsIURI** aURI)
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{
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*aURI = nullptr;
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return NS_OK;
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}
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const nsTArray<nsCOMPtr<nsIPrincipal>>&
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ExpandedPrincipal::WhiteList()
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{
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return mPrincipals;
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}
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NS_IMETHODIMP
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ExpandedPrincipal::GetBaseDomain(nsACString& aBaseDomain)
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{
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return NS_ERROR_NOT_AVAILABLE;
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}
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NS_IMETHODIMP
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ExpandedPrincipal::GetAddonId(nsAString& aAddonId)
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{
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aAddonId.Truncate();
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return NS_OK;
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};
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bool
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ExpandedPrincipal::AddonHasPermission(const nsAtom* aPerm)
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{
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for (size_t i = 0; i < mPrincipals.Length(); ++i) {
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if (BasePrincipal::Cast(mPrincipals[i])->AddonHasPermission(aPerm)) {
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return true;
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}
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}
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return false;
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}
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bool
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ExpandedPrincipal::AddonAllowsLoad(nsIURI* aURI, bool aExplicit /* = false */)
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{
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for (const auto& principal : mPrincipals) {
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if (Cast(principal)->AddonAllowsLoad(aURI, aExplicit)) {
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return true;
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}
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}
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return false;
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}
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nsIPrincipal*
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ExpandedPrincipal::PrincipalToInherit(nsIURI* aRequestedURI)
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{
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if (aRequestedURI) {
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// If a given sub-principal subsumes the given URI, use that principal for
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// inheritance. In general, this only happens with certain CORS modes, loads
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// with forced principal inheritance, and creation of XML documents from
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// XMLHttpRequests or fetch requests. For URIs that normally inherit a
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// principal (such as data: URIs), we fall back to the last principal in the
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// whitelist.
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for (const auto& principal : mPrincipals) {
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if (Cast(principal)->MayLoadInternal(aRequestedURI)) {
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return principal;
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}
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}
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}
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return mPrincipals.LastElement();
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}
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nsresult
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ExpandedPrincipal::GetScriptLocation(nsACString& aStr)
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{
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aStr.AssignLiteral("[Expanded Principal [");
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for (size_t i = 0; i < mPrincipals.Length(); ++i) {
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if (i != 0) {
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aStr.AppendLiteral(", ");
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}
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nsAutoCString spec;
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nsresult rv =
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nsJSPrincipals::get(mPrincipals.ElementAt(i))->GetScriptLocation(spec);
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NS_ENSURE_SUCCESS(rv, rv);
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aStr.Append(spec);
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}
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aStr.AppendLiteral("]]");
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return NS_OK;
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}
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//////////////////////////////////////////
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// Methods implementing nsISerializable //
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//////////////////////////////////////////
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// We've had way too many issues with unversioned serializations, so
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// explicitly version this one.
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static const uint32_t kSerializationVersion = 1;
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NS_IMETHODIMP
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ExpandedPrincipal::Read(nsIObjectInputStream* aStream)
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{
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uint32_t version;
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nsresult rv = aStream->Read32(&version);
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if (version != kSerializationVersion) {
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MOZ_ASSERT(false,
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"We really need to add handling of the old(?) version here");
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return NS_ERROR_UNEXPECTED;
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}
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uint32_t count;
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rv = aStream->Read32(&count);
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if (NS_FAILED(rv)) {
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return rv;
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}
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if (!mPrincipals.SetCapacity(count, fallible)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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OriginComparator c;
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for (uint32_t i = 0; i < count; ++i) {
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nsCOMPtr<nsISupports> read;
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rv = aStream->ReadObject(true, getter_AddRefs(read));
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if (NS_FAILED(rv)) {
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return rv;
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}
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nsCOMPtr<nsIPrincipal> principal = do_QueryInterface(read);
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if (!principal) {
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return NS_ERROR_UNEXPECTED;
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}
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// Play it safe and InsertElementSorted, in case the sort order
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// changed for some bizarre reason.
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mPrincipals.InsertElementSorted(std::move(principal), c);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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ExpandedPrincipal::Write(nsIObjectOutputStream* aStream)
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{
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nsresult rv = aStream->Write32(kSerializationVersion);
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if (NS_FAILED(rv)) {
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return rv;
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}
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rv = aStream->Write32(mPrincipals.Length());
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if (NS_FAILED(rv)) {
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return rv;
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}
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for (auto& principal : mPrincipals) {
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rv = aStream->WriteObject(principal, true);
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if (NS_FAILED(rv)) {
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return rv;
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}
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}
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return NS_OK;
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}
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