// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/net/nss_context.h"

#include "build/chromeos_buildflags.h"
#include "content/public/browser/browser_thread.h"
#include "crypto/nss_util.h"
#include "net/cert/nss_cert_database.h"

namespace {
net::NSSCertDatabase* g_nss_cert_database = NULL;

net::NSSCertDatabase* GetNSSCertDatabaseForResourceContext(
    base::OnceCallback<void(net::NSSCertDatabase*)> callback) {
  // This initialization is not thread safe. This CHECK ensures that this code
  // is only run on a single thread.
  CHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));

#if BUILDFLAG(IS_CHROMEOS_LACROS)
  // TODO(crbug.com/1147032): remove the CHECK after the certificates settings
  // page is updated.
  CHECK(false) << "Currently disabled for Lacros-Chrome.";
#endif

  if (!g_nss_cert_database) {
    // Linux has only a single persistent slot compared to ChromeOS's separate
    // public and private slot.
    // Redirect any slot usage to this persistent slot on Linux.
    crypto::EnsureNSSInit();
    g_nss_cert_database = new net::NSSCertDatabase(
        crypto::ScopedPK11Slot(PK11_GetInternalKeySlot()) /* public slot */,
        crypto::ScopedPK11Slot(PK11_GetInternalKeySlot()) /* private slot */);
  }
  return g_nss_cert_database;
}

}  // namespace

NssCertDatabaseGetter CreateNSSCertDatabaseGetter(
    content::BrowserContext* browser_context) {
  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  // Not used, but should not be nullptr, since it's used by the ChromeOS Ash
  // implementation of this method.
  DCHECK(browser_context);
  return base::BindOnce(&GetNSSCertDatabaseForResourceContext);
}