Source code
Revision control
Copy as Markdown
Other Tools
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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
/* The privileged system principal. */
#include "nscore.h"
#include "SystemPrincipal.h"
#include "mozilla/ClearOnShutdown.h"
#include "nsCOMPtr.h"
#include "nsReadableUtils.h"
#include "nsCRT.h"
#include "nsString.h"
#include "nsIClassInfoImpl.h"
#include "pratom.h"
using namespace mozilla;
NS_IMPL_CLASSINFO(SystemPrincipal, nullptr, nsIClassInfo::SINGLETON,
NS_SYSTEMPRINCIPAL_CID)
NS_IMPL_QUERY_INTERFACE_CI(SystemPrincipal, nsIPrincipal, nsISerializable)
NS_IMPL_CI_INTERFACE_GETTER(SystemPrincipal, nsIPrincipal, nsISerializable)
static constexpr nsLiteralCString kSystemPrincipalSpec =
"[System Principal]"_ns;
SystemPrincipal::SystemPrincipal()
: BasePrincipal(eSystemPrincipal, kSystemPrincipalSpec,
OriginAttributes()) {}
static StaticMutex sSystemPrincipalMutex;
static StaticRefPtr<SystemPrincipal> sSystemPrincipal
MOZ_GUARDED_BY(sSystemPrincipalMutex);
already_AddRefed<SystemPrincipal> SystemPrincipal::Get() {
StaticMutexAutoLock lock(sSystemPrincipalMutex);
return do_AddRef(sSystemPrincipal);
}
already_AddRefed<SystemPrincipal> SystemPrincipal::Init() {
AssertIsOnMainThread();
StaticMutexAutoLock lock(sSystemPrincipalMutex);
if (MOZ_UNLIKELY(sSystemPrincipal)) {
MOZ_ASSERT_UNREACHABLE("SystemPrincipal::Init() may only be called once");
} else {
sSystemPrincipal = new SystemPrincipal();
}
return do_AddRef(sSystemPrincipal);
}
void SystemPrincipal::Shutdown() {
AssertIsOnMainThread();
StaticMutexAutoLock lock(sSystemPrincipalMutex);
MOZ_ASSERT(sSystemPrincipal);
sSystemPrincipal = nullptr;
}
nsresult SystemPrincipal::GetScriptLocation(nsACString& aStr) {
aStr.Assign(kSystemPrincipalSpec);
return NS_OK;
}
///////////////////////////////////////
// Methods implementing nsIPrincipal //
///////////////////////////////////////
uint32_t SystemPrincipal::GetHashValue() { return NS_PTR_TO_INT32(this); }
NS_IMETHODIMP
SystemPrincipal::GetURI(nsIURI** aURI) {
*aURI = nullptr;
return NS_OK;
}
NS_IMETHODIMP
SystemPrincipal::GetIsOriginPotentiallyTrustworthy(bool* aResult) {
*aResult = true;
return NS_OK;
}
NS_IMETHODIMP
SystemPrincipal::GetDomain(nsIURI** aDomain) {
*aDomain = nullptr;
return NS_OK;
}
NS_IMETHODIMP
SystemPrincipal::SetDomain(nsIURI* aDomain) { return NS_OK; }
NS_IMETHODIMP
SystemPrincipal::GetBaseDomain(nsACString& aBaseDomain) {
// No base domain for chrome.
return NS_OK;
}
NS_IMETHODIMP
SystemPrincipal::GetAddonId(nsAString& aAddonId) {
aAddonId.Truncate();
return NS_OK;
};
//////////////////////////////////////////
// Methods implementing nsISerializable //
//////////////////////////////////////////
NS_IMETHODIMP
SystemPrincipal::Read(nsIObjectInputStream* aStream) {
// no-op: CID is sufficient to identify the mSystemPrincipal singleton
return NS_OK;
}
NS_IMETHODIMP
SystemPrincipal::Write(nsIObjectOutputStream* aStream) {
// Read is used still for legacy principals
MOZ_RELEASE_ASSERT(false, "Old style serialization is removed");
return NS_OK;
}