gecko-dev/caps/NullPrincipal.cpp

295 lines
8.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 sts=2 ts=2 et 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/. */
/**
* This is the principal that has no rights and can't be accessed by
* anything other than itself and chrome; null principals are not
* same-origin with anything but themselves.
*/
#include "mozilla/ArrayUtils.h"
#include "nsDocShell.h"
#include "NullPrincipal.h"
#include "NullPrincipalURI.h"
#include "nsMemory.h"
#include "nsIClassInfoImpl.h"
#include "nsNetCID.h"
#include "nsError.h"
#include "ContentPrincipal.h"
#include "nsScriptSecurityManager.h"
#include "pratom.h"
#include "json/json.h"
using namespace mozilla;
NS_IMPL_CLASSINFO(NullPrincipal, nullptr, nsIClassInfo::MAIN_THREAD_ONLY,
NS_NULLPRINCIPAL_CID)
NS_IMPL_QUERY_INTERFACE_CI(NullPrincipal, nsIPrincipal, nsISerializable)
NS_IMPL_CI_INTERFACE_GETTER(NullPrincipal, nsIPrincipal, nsISerializable)
/* static */
already_AddRefed<NullPrincipal> NullPrincipal::CreateWithInheritedAttributes(
nsIPrincipal* aInheritFrom) {
MOZ_ASSERT(aInheritFrom);
return CreateWithInheritedAttributes(
Cast(aInheritFrom)->OriginAttributesRef(), false);
}
/* static */
already_AddRefed<NullPrincipal> NullPrincipal::CreateWithInheritedAttributes(
nsIDocShell* aDocShell, bool aIsFirstParty) {
MOZ_ASSERT(aDocShell);
OriginAttributes attrs = nsDocShell::Cast(aDocShell)->GetOriginAttributes();
return CreateWithInheritedAttributes(attrs, aIsFirstParty);
}
/* static */
already_AddRefed<NullPrincipal> NullPrincipal::CreateWithInheritedAttributes(
const OriginAttributes& aOriginAttributes, bool aIsFirstParty) {
RefPtr<NullPrincipal> nullPrin = new NullPrincipal();
nsresult rv = nullPrin->Init(aOriginAttributes, aIsFirstParty);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
return nullPrin.forget();
}
/* static */
already_AddRefed<NullPrincipal> NullPrincipal::Create(
const OriginAttributes& aOriginAttributes, nsIURI* aURI) {
RefPtr<NullPrincipal> nullPrin = new NullPrincipal();
nsresult rv = nullPrin->Init(aOriginAttributes, aURI);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
return nullPrin.forget();
}
/* static */
already_AddRefed<NullPrincipal> NullPrincipal::CreateWithoutOriginAttributes() {
return NullPrincipal::Create(OriginAttributes(), nullptr);
}
nsresult NullPrincipal::Init(const OriginAttributes& aOriginAttributes,
nsIURI* aURI) {
if (aURI) {
nsAutoCString scheme;
nsresult rv = aURI->GetScheme(scheme);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(scheme.EqualsLiteral(NS_NULLPRINCIPAL_SCHEME),
NS_ERROR_NOT_AVAILABLE);
mURI = aURI;
} else {
mURI = new NullPrincipalURI();
}
nsAutoCString originNoSuffix;
DebugOnly<nsresult> rv = mURI->GetSpec(originNoSuffix);
MOZ_ASSERT(NS_SUCCEEDED(rv));
FinishInit(originNoSuffix, aOriginAttributes);
return NS_OK;
}
nsresult NullPrincipal::Init(const OriginAttributes& aOriginAttributes,
bool aIsFirstParty, nsIURI* aURI) {
if (aURI) {
nsAutoCString scheme;
nsresult rv = aURI->GetScheme(scheme);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(scheme.EqualsLiteral(NS_NULLPRINCIPAL_SCHEME),
NS_ERROR_NOT_AVAILABLE);
mURI = aURI;
} else {
mURI = new NullPrincipalURI();
}
nsAutoCString originNoSuffix;
DebugOnly<nsresult> rv = mURI->GetSpec(originNoSuffix);
MOZ_ASSERT(NS_SUCCEEDED(rv));
nsAutoCString path;
rv = mURI->GetPathQueryRef(path);
MOZ_ASSERT(NS_SUCCEEDED(rv));
OriginAttributes attrs(aOriginAttributes);
if (aIsFirstParty) {
// remove the '{}' characters from both ends.
path.Mid(path, 1, path.Length() - 2);
path.AppendLiteral(".mozilla");
attrs.SetFirstPartyDomain(true, path);
}
FinishInit(originNoSuffix, attrs);
return NS_OK;
}
nsresult NullPrincipal::GetScriptLocation(nsACString& aStr) {
return mURI->GetSpec(aStr);
}
/**
* nsIPrincipal implementation
*/
uint32_t NullPrincipal::GetHashValue() { return (NS_PTR_TO_INT32(this) >> 2); }
NS_IMETHODIMP
NullPrincipal::GetURI(nsIURI** aURI) {
nsCOMPtr<nsIURI> uri = mURI;
uri.forget(aURI);
return NS_OK;
}
NS_IMETHODIMP
NullPrincipal::GetIsOriginPotentiallyTrustworthy(bool* aResult) {
*aResult = false;
return NS_OK;
}
NS_IMETHODIMP
NullPrincipal::GetDomain(nsIURI** aDomain) {
nsCOMPtr<nsIURI> uri = mURI;
uri.forget(aDomain);
return NS_OK;
}
NS_IMETHODIMP
NullPrincipal::SetDomain(nsIURI* aDomain) {
// I think the right thing to do here is to just throw... Silently failing
// seems counterproductive.
return NS_ERROR_NOT_AVAILABLE;
}
bool NullPrincipal::MayLoadInternal(nsIURI* aURI) {
// Also allow the load if we are the principal of the URI being checked.
nsCOMPtr<nsIPrincipal> blobPrincipal;
if (dom::BlobURLProtocolHandler::GetBlobURLPrincipal(
aURI, getter_AddRefs(blobPrincipal))) {
MOZ_ASSERT(blobPrincipal);
return SubsumesInternal(blobPrincipal,
BasePrincipal::ConsiderDocumentDomain);
}
return false;
}
NS_IMETHODIMP
NullPrincipal::GetBaseDomain(nsACString& aBaseDomain) {
// For a null principal, we use our unique uuid as the base domain.
return mURI->GetPathQueryRef(aBaseDomain);
}
NS_IMETHODIMP
NullPrincipal::GetAddonId(nsAString& aAddonId) {
aAddonId.Truncate();
return NS_OK;
};
/**
* nsISerializable implementation
*/
NS_IMETHODIMP
NullPrincipal::Read(nsIObjectInputStream* aStream) {
// Note - NullPrincipal use NS_GENERIC_FACTORY_CONSTRUCTOR_INIT, which means
// that the Init() method has already been invoked by the time we deserialize.
// This is in contrast to ContentPrincipal, which uses
// NS_GENERIC_FACTORY_CONSTRUCTOR, in which case ::Read needs to invoke
// Init().
nsAutoCString spec;
nsresult rv = aStream->ReadCString(spec);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), spec);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString suffix;
rv = aStream->ReadCString(suffix);
NS_ENSURE_SUCCESS(rv, rv);
OriginAttributes attrs;
bool ok = attrs.PopulateFromSuffix(suffix);
NS_ENSURE_TRUE(ok, NS_ERROR_FAILURE);
return Init(attrs, uri);
}
NS_IMETHODIMP
NullPrincipal::Write(nsIObjectOutputStream* aStream) {
// Read is used still for legacy principals
MOZ_RELEASE_ASSERT(false, "Old style serialization is removed");
return NS_OK;
}
nsresult NullPrincipal::PopulateJSONObject(Json::Value& aObject) {
nsAutoCString principalURI;
nsresult rv = mURI->GetSpec(principalURI);
NS_ENSURE_SUCCESS(rv, rv);
MOZ_ASSERT(principalURI.Length() ==
nsLiteralCString(NS_NULLPRINCIPAL_SCHEME ":").Length() +
NSID_LENGTH - 1,
"Length of the URI should be: (scheme, uuid, - nullptr)");
aObject[std::to_string(eSpec)] = principalURI.get();
nsAutoCString suffix;
OriginAttributesRef().CreateSuffix(suffix);
if (suffix.Length() > 0) {
aObject[std::to_string(eSuffix)] = suffix.get();
}
return NS_OK;
}
already_AddRefed<BasePrincipal> NullPrincipal::FromProperties(
nsTArray<NullPrincipal::KeyVal>& aFields) {
MOZ_ASSERT(aFields.Length() == eMax + 1, "Must have all the keys");
nsresult rv;
nsCOMPtr<nsIURI> uri;
OriginAttributes attrs;
// The odd structure here is to make the code to not compile
// if all the switch enum cases haven't been codified
for (const auto& field : aFields) {
switch (field.key) {
case NullPrincipal::eSpec:
if (!field.valueWasSerialized) {
MOZ_ASSERT(false,
"Null principals require a spec URI in serialized JSON");
return nullptr;
}
rv = NS_NewURI(getter_AddRefs(uri), field.value);
NS_ENSURE_SUCCESS(rv, nullptr);
break;
case NullPrincipal::eSuffix:
bool ok = attrs.PopulateFromSuffix(field.value);
if (!ok) {
return nullptr;
}
break;
}
}
if (!uri) {
MOZ_ASSERT(false, "No URI deserialized");
return nullptr;
}
RefPtr<NullPrincipal> nullPrincipal = new NullPrincipal();
rv = nullPrincipal->Init(attrs, uri);
if (NS_FAILED(rv)) {
return nullptr;
}
return nullPrincipal.forget();
}