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