Mirror of roytam1's UXP fork just in case Moonchild and Tobin decide to go after him
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "xpcpublic.h"
#include "nsString.h"
#include "nsIObjectOutputStream.h"
#include "nsIObjectInputStream.h"
#include "nsJSPrincipals.h"
#include "plstr.h"
#include "nsXPIDLString.h"
#include "nsCOMPtr.h"
#include "nsIServiceManager.h"
#include "nsMemory.h"
#include "nsStringBuffer.h"
#include "mozilla/ipc/PBackgroundSharedTypes.h"
#include "mozilla/dom/StructuredCloneTags.h"
// for mozilla::dom::workers::kJSPrincipalsDebugToken
#include "mozilla/dom/workers/Workers.h"
#include "mozilla/ipc/BackgroundUtils.h"
using namespace mozilla;
using namespace mozilla::ipc;
using namespace mozilla::dom;
NS_IMETHODIMP_(MozExternalRefCountType)
nsJSPrincipals::AddRef()
{
MOZ_ASSERT(NS_IsMainThread());
NS_PRECONDITION(int32_t(refcount) >= 0, "illegal refcnt");
nsrefcnt count = ++refcount;
NS_LOG_ADDREF(this, count, "nsJSPrincipals", sizeof(*this));
return count;
}
NS_IMETHODIMP_(MozExternalRefCountType)
nsJSPrincipals::Release()
{
MOZ_ASSERT(NS_IsMainThread());
NS_PRECONDITION(0 != refcount, "dup release");
nsrefcnt count = --refcount;
NS_LOG_RELEASE(this, count, "nsJSPrincipals");
if (count == 0) {
delete this;
}
return count;
}
/* static */ bool
nsJSPrincipals::Subsume(JSPrincipals *jsprin, JSPrincipals *other)
{
bool result;
nsresult rv = nsJSPrincipals::get(jsprin)->Subsumes(nsJSPrincipals::get(other), &result);
return NS_SUCCEEDED(rv) && result;
}
/* static */ void
nsJSPrincipals::Destroy(JSPrincipals *jsprin)
{
// The JS runtime can call this method during the last GC when
// nsScriptSecurityManager is destroyed. So we must not assume here that
// the security manager still exists.
nsJSPrincipals *nsjsprin = nsJSPrincipals::get(jsprin);
// We need to destroy the nsIPrincipal. We'll do this by adding
// to the refcount and calling release
#ifdef NS_BUILD_REFCNT_LOGGING
// The refcount logging considers AddRef-to-1 to indicate creation,
// so trick it into thinking it's otherwise, but balance the
// Release() we do below.
nsjsprin->refcount++;
nsjsprin->AddRef();
nsjsprin->refcount--;
#else
nsjsprin->refcount++;
#endif
nsjsprin->Release();
}
#ifdef DEBUG
// Defined here so one can do principals->dump() in the debugger
JS_PUBLIC_API(void)
JSPrincipals::dump()
{
if (debugToken == nsJSPrincipals::DEBUG_TOKEN) {
nsAutoCString str;
nsresult rv = static_cast<nsJSPrincipals *>(this)->GetScriptLocation(str);
fprintf(stderr, "nsIPrincipal (%p) = %s\n", static_cast<void*>(this),
NS_SUCCEEDED(rv) ? str.get() : "(unknown)");
} else if (debugToken == dom::workers::kJSPrincipalsDebugToken) {
fprintf(stderr, "Web Worker principal singleton (%p)\n", this);
} else {
fprintf(stderr,
"!!! JSPrincipals (%p) is not nsJSPrincipals instance - bad token: "
"actual=0x%x expected=0x%x\n",
this, unsigned(debugToken), unsigned(nsJSPrincipals::DEBUG_TOKEN));
}
}
#endif
/* static */ bool
nsJSPrincipals::ReadPrincipals(JSContext* aCx, JSStructuredCloneReader* aReader,
JSPrincipals** aOutPrincipals)
{
uint32_t tag;
uint32_t unused;
if (!JS_ReadUint32Pair(aReader, &tag, &unused)) {
return false;
}
if (!(tag == SCTAG_DOM_NULL_PRINCIPAL ||
tag == SCTAG_DOM_SYSTEM_PRINCIPAL ||
tag == SCTAG_DOM_CONTENT_PRINCIPAL ||
tag == SCTAG_DOM_EXPANDED_PRINCIPAL)) {
xpc::Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
return false;
}
return ReadKnownPrincipalType(aCx, aReader, tag, aOutPrincipals);
}
static bool
ReadSuffixAndSpec(JSStructuredCloneReader* aReader,
PrincipalOriginAttributes& aAttrs,
nsACString& aSpec)
{
uint32_t suffixLength, specLength;
if (!JS_ReadUint32Pair(aReader, &suffixLength, &specLength)) {
return false;
}
nsAutoCString suffix;
if (!suffix.SetLength(suffixLength, fallible)) {
return false;
}
if (!JS_ReadBytes(aReader, suffix.BeginWriting(), suffixLength)) {
return false;
}
if (!aAttrs.PopulateFromSuffix(suffix)) {
return false;
}
if (!aSpec.SetLength(specLength, fallible)) {
return false;
}
if (!JS_ReadBytes(aReader, aSpec.BeginWriting(), specLength)) {
return false;
}
return true;
}
static bool
ReadPrincipalInfo(JSStructuredCloneReader* aReader,
uint32_t aTag,
PrincipalInfo& aInfo)
{
if (aTag == SCTAG_DOM_SYSTEM_PRINCIPAL) {
aInfo = SystemPrincipalInfo();
} else if (aTag == SCTAG_DOM_NULL_PRINCIPAL) {
PrincipalOriginAttributes attrs;
nsAutoCString dummy;
if (!ReadSuffixAndSpec(aReader, attrs, dummy)) {
return false;
}
aInfo = NullPrincipalInfo(attrs);
} else if (aTag == SCTAG_DOM_EXPANDED_PRINCIPAL) {
uint32_t length, unused;
if (!JS_ReadUint32Pair(aReader, &length, &unused)) {
return false;
}
ExpandedPrincipalInfo expanded;
for (uint32_t i = 0; i < length; i++) {
uint32_t tag;
if (!JS_ReadUint32Pair(aReader, &tag, &unused)) {
return false;
}
PrincipalInfo sub;
if (!ReadPrincipalInfo(aReader, tag, sub)) {
return false;
}
expanded.whitelist().AppendElement(sub);
}
aInfo = expanded;
} else if (aTag == SCTAG_DOM_CONTENT_PRINCIPAL) {
PrincipalOriginAttributes attrs;
nsAutoCString spec;
if (!ReadSuffixAndSpec(aReader, attrs, spec)) {
return false;
}
aInfo = ContentPrincipalInfo(attrs, void_t(), spec);
} else {
MOZ_CRASH("unexpected principal structured clone tag");
}
return true;
}
/* static */ bool
nsJSPrincipals::ReadKnownPrincipalType(JSContext* aCx,
JSStructuredCloneReader* aReader,
uint32_t aTag,
JSPrincipals** aOutPrincipals)
{
MOZ_ASSERT(aTag == SCTAG_DOM_NULL_PRINCIPAL ||
aTag == SCTAG_DOM_SYSTEM_PRINCIPAL ||
aTag == SCTAG_DOM_CONTENT_PRINCIPAL ||
aTag == SCTAG_DOM_EXPANDED_PRINCIPAL);
if (NS_WARN_IF(!NS_IsMainThread())) {
xpc::Throw(aCx, NS_ERROR_UNCATCHABLE_EXCEPTION);
return false;
}
PrincipalInfo info;
if (!ReadPrincipalInfo(aReader, aTag, info)) {
return false;
}
nsresult rv;
nsCOMPtr<nsIPrincipal> prin = PrincipalInfoToPrincipal(info, &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
xpc::Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
return false;
}
*aOutPrincipals = get(prin.forget().take());
return true;
}
static bool
WriteSuffixAndSpec(JSStructuredCloneWriter* aWriter,
const PrincipalOriginAttributes& aAttrs,
const nsCString& aSpec)
{
nsAutoCString suffix;
aAttrs.CreateSuffix(suffix);
return JS_WriteUint32Pair(aWriter, suffix.Length(), aSpec.Length()) &&
JS_WriteBytes(aWriter, suffix.get(), suffix.Length()) &&
JS_WriteBytes(aWriter, aSpec.get(), aSpec.Length());
}
static bool
WritePrincipalInfo(JSStructuredCloneWriter* aWriter, const PrincipalInfo& aInfo)
{
if (aInfo.type() == PrincipalInfo::TNullPrincipalInfo) {
const NullPrincipalInfo& nullInfo = aInfo;
return JS_WriteUint32Pair(aWriter, SCTAG_DOM_NULL_PRINCIPAL, 0) &&
WriteSuffixAndSpec(aWriter, nullInfo.attrs(), EmptyCString());
}
if (aInfo.type() == PrincipalInfo::TSystemPrincipalInfo) {
return JS_WriteUint32Pair(aWriter, SCTAG_DOM_SYSTEM_PRINCIPAL, 0);
}
if (aInfo.type() == PrincipalInfo::TExpandedPrincipalInfo) {
const ExpandedPrincipalInfo& expanded = aInfo;
if (!JS_WriteUint32Pair(aWriter, SCTAG_DOM_EXPANDED_PRINCIPAL, 0) ||
!JS_WriteUint32Pair(aWriter, expanded.whitelist().Length(), 0)) {
return false;
}
for (uint32_t i = 0; i < expanded.whitelist().Length(); i++) {
if (!WritePrincipalInfo(aWriter, expanded.whitelist()[i])) {
return false;
}
}
return true;
}
MOZ_ASSERT(aInfo.type() == PrincipalInfo::TContentPrincipalInfo);
const ContentPrincipalInfo& cInfo = aInfo;
return JS_WriteUint32Pair(aWriter, SCTAG_DOM_CONTENT_PRINCIPAL, 0) &&
WriteSuffixAndSpec(aWriter, cInfo.attrs(), cInfo.spec());
}
bool
nsJSPrincipals::write(JSContext* aCx, JSStructuredCloneWriter* aWriter)
{
PrincipalInfo info;
if (NS_WARN_IF(NS_FAILED(PrincipalToPrincipalInfo(this, &info)))) {
xpc::Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
return false;
}
return WritePrincipalInfo(aWriter, info);
}