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/* -*- Mode: C++; tab-width: 2; 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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsNSSModule.h"
#include "ContentSignatureVerifier.h"
#include "OSKeyStore.h"
#include "OSReauthenticator.h"
#include "PKCS11ModuleDB.h"
#include "SecretDecoderRing.h"
#include "mozilla/MacroArgs.h"
#include "mozilla/ModuleUtils.h"
#include "mozilla/SyncRunnable.h"
#include "nsCertTree.h"
#include "nsNSSCertificateDB.h"
#include "nsPK11TokenDB.h"
#include "nsRandomGenerator.h"
#include "nsXULAppAPI.h"
namespace mozilla {
namespace psm {
// Many of the implementations in this module call NSS functions and as a result
// require that PSM has successfully initialized NSS before being used.
// Additionally, some of the implementations have various restrictions on which
// process and threads they can be used on (e.g. some can only be used in the
// parent process and some must be initialized only on the main thread).
// The following initialization framework allows these requirements to be
// succinctly expressed and implemented.
template <class InstanceClass, nsresult (InstanceClass::*InitMethod)()>
MOZ_ALWAYS_INLINE static nsresult Instantiate(REFNSIID aIID, void** aResult) {
InstanceClass* inst = new InstanceClass();
NS_ADDREF(inst);
nsresult rv = InitMethod != nullptr ? (inst->*InitMethod)() : NS_OK;
if (NS_SUCCEEDED(rv)) {
rv = inst->QueryInterface(aIID, aResult);
}
NS_RELEASE(inst);
return rv;
}
enum class ThreadRestriction {
// must be initialized on the main thread (but can be used on any thread)
MainThreadOnly,
// can be initialized and used on any thread
AnyThread,
};
enum class ProcessRestriction {
ParentProcessOnly,
AnyProcess,
};
template <class InstanceClass,
nsresult (InstanceClass::*InitMethod)() = nullptr,
ProcessRestriction processRestriction =
ProcessRestriction::ParentProcessOnly,
ThreadRestriction threadRestriction = ThreadRestriction::AnyThread>
static nsresult Constructor(REFNSIID aIID, void** aResult) {
*aResult = nullptr;
if (processRestriction == ProcessRestriction::ParentProcessOnly &&
!XRE_IsParentProcess()) {
return NS_ERROR_NOT_AVAILABLE;
}
if (!EnsureNSSInitializedChromeOrContent()) {
return NS_ERROR_FAILURE;
}
if (threadRestriction == ThreadRestriction::MainThreadOnly &&
!NS_IsMainThread()) {
return NS_ERROR_NOT_SAME_THREAD;
}
return Instantiate<InstanceClass, InitMethod>(aIID, aResult);
}
#define IMPL(type, ...) \
template <> \
nsresult NSSConstructor<type>(const nsIID& aIID, void** aResult) { \
return Constructor<type, __VA_ARGS__>(aIID, aResult); \
}
// Components that require main thread initialization could cause a deadlock
// in necko code (bug 1418752). To prevent it we initialize all such components
// on main thread in advance in net_EnsurePSMInit(). Update that function when
// new component with ThreadRestriction::MainThreadOnly is added.
IMPL(SecretDecoderRing, nullptr)
IMPL(nsPK11TokenDB, nullptr)
IMPL(PKCS11ModuleDB, nullptr)
IMPL(nsNSSCertificateDB, nullptr)
IMPL(nsCertTree, nullptr)
IMPL(ContentSignatureVerifier, nullptr)
IMPL(nsRandomGenerator, nullptr, ProcessRestriction::AnyProcess)
IMPL(OSKeyStore, nullptr, ProcessRestriction::ParentProcessOnly,
ThreadRestriction::MainThreadOnly)
IMPL(OSReauthenticator, nullptr, ProcessRestriction::ParentProcessOnly,
ThreadRestriction::MainThreadOnly)
#undef IMPL
} // namespace psm
} // namespace mozilla
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