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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CRYPTO_NSS_UTIL_H_
#define CRYPTO_NSS_UTIL_H_
#include <stdint.h>
#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/functional/callback_forward.h"
#include "base/threading/thread_restrictions.h"
#include "build/build_config.h"
#include "components/nacl/common/buildflags.h"
#include "crypto/crypto_export.h"
namespace base {
class Time;
} // namespace base
// This file specifically doesn't depend on any NSS or NSPR headers because it
// is included by various (non-crypto) parts of chrome to call the
// initialization functions.
namespace crypto {
class ScopedAllowBlockingForNSS : public base::ScopedAllowBlocking {};
// Initialize NRPR if it isn't already initialized. This function is
// thread-safe, and NSPR will only ever be initialized once.
CRYPTO_EXPORT void EnsureNSPRInit();
// Initialize NSS if it isn't already initialized. This must be called before
// any other NSS functions. This function is thread-safe, and NSS will only
// ever be initialized once.
CRYPTO_EXPORT void EnsureNSSInit();
// Check if the current NSS version is greater than or equals to |version|.
// A sample version string is "3.12.3".
bool CheckNSSVersion(const char* version);
#if BUILDFLAG(IS_CHROMEOS) && !BUILDFLAG(IS_MINIMAL_TOOLCHAIN)
// Returns true once the TPM is owned and PKCS#11 initialized with the
// user and security officer PINs, and Chaps has been successfully loaded into
// NSS. Returns false if the TPM will never be loaded.
CRYPTO_EXPORT void IsTPMTokenEnabled(base::OnceCallback<void(bool)> callback);
// Initialize the TPM token and system slot. The |callback| will run on the same
// thread with true if the token and slot were successfully loaded or were
// already initialized. |callback| will be passed false if loading failed.
// Should be called only once.
CRYPTO_EXPORT void InitializeTPMTokenAndSystemSlot(
int system_slot_id,
base::OnceCallback<void(bool)> callback);
// Notifies clients that the TPM has finished initialization (i.e. notify
// the callbacks of `IsTPMTokenEnabled()` or `GetSystemNSSKeySlot()`).
// If `InitializeTPMTokenAndSystemSlot()` has been called before this method,
// this signals that the TPM is enabled, and should use the slot configured by
// those methods. If neither of those methods have been called, this signals
// that no TPM system slot will be available.
CRYPTO_EXPORT void FinishInitializingTPMTokenAndSystemSlot();
// TODO(crbug.com/1163303) Remove when the bug is fixed.
// Can be used to collect additional information when public slot fails to open.
// Mainly checks the access permissions on the files and tries to read them.
// Crashes Chrome because it will crash anyway when it tries to instantiate
// NSSCertDatabase with a nullptr public slot, crashing early can provide better
// logs/stacktraces for diagnosing.
// Takes `nss_path` where NSS is supposed to be (or created). Will attempt
// creating the path if it doesn't exist (to check that it can be done).
// Theoretically the path should already exist because it's created when Chrome
// tries to open the public slot.
CRYPTO_EXPORT void DiagnosePublicSlotAndCrash(const base::FilePath& nss_path);
#endif // BUILDFLAG(IS_CHROMEOS) && !BUILDFLAG(IS_MINIMAL_TOOLCHAIN)
// Convert a NSS PRTime value into a base::Time object.
// We use a int64_t instead of PRTime here to avoid depending on NSPR headers.
CRYPTO_EXPORT base::Time PRTimeToBaseTime(int64_t prtime);
// Convert a base::Time object into a PRTime value.
// We use a int64_t instead of PRTime here to avoid depending on NSPR headers.
CRYPTO_EXPORT int64_t BaseTimeToPRTime(base::Time time);
} // namespace crypto
#endif // CRYPTO_NSS_UTIL_H_
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