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// Copyright 2019 The Chromium OS 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 <memory>
#include <string>
#include <authpolicy/proto_bindings/active_directory_info.pb.h>
#include <base/callback.h>
#include <base/files/file_path.h>
#include "smbfs/kerberos_artifact_client_interface.h"
namespace dbus {
class Signal;
} // namespace dbus
namespace smbfs {
// KerberosArtifactSynchronizer manages a Kerberos user's kr5conf and krb5ccache
// files. It takes ownership of a KerberosArtifactClientInterface on
// construction. SetupKerberos fetches a users Kerberos files from AuthPolicy
// and writes a copy to the tempfs. The Kerberos files are kept
// up-to-date by connecting to AuthPolicy's D-Bus signal.
class KerberosArtifactSynchronizer {
using SetupKerberosCallback = base::OnceCallback<void(bool setup_success)>;
const base::FilePath& krb5_conf_path,
const base::FilePath& krb5_ccache_path,
const std::string& account_identifier,
std::unique_ptr<KerberosArtifactClientInterface> client);
KerberosArtifactSynchronizer(const KerberosArtifactSynchronizer&) = delete;
KerberosArtifactSynchronizer& operator=(const KerberosArtifactSynchronizer&) =
// Sets up Kerberos for user with |account_identifier_|. User must be ChromAD.
// |callback| is run with the result. May only be called once per instance.
void SetupKerberos(SetupKerberosCallback callback);
// Calls GetUserKerberosFiles on |client_|.
void GetFiles(SetupKerberosCallback callback);
// Response handler for GetUserKerberosFiles.
void OnGetFilesResponse(SetupKerberosCallback callback,
bool success,
const std::string& krb5_ccache_data,
const std::string& krb5_conf_data);
// Writes |krb5_ccache_data| and |krb5_conf_data| to |krb5_ccache_path_| and
// |krb5_conf_path_| respectively and runs |callback|.
void WriteFiles(const std::string& krb5_ccache_data,
const std::string& krb5_conf_data,
SetupKerberosCallback callback);
// Writes |kerberos_file| to |path|. First writes into a temporary file
// and then replaces the existing one. Returns true if the write succeeds,
// false if it fails. The parent directory of |path| must exist.
bool WriteFile(const base::FilePath& path, const std::string& kerberos_file);
// Connects to the 'UserKerberosFilesChanged' D-Bus signal. Runs as a callback
// to GetFiles().
void ConnectToKerberosFilesChangedSignal(SetupKerberosCallback callback,
bool success);
// Callback for 'UserKerberosFilesChanged' D-Bus signal.
void OnKerberosFilesChanged(dbus::Signal* signal);
// Called after connecting to 'UserKerberosFilesChanged' signal. Verifies that
// the signal connected successfully.
void OnKerberosFilesChangedSignalConnected(SetupKerberosCallback callback,
const std::string& interface_name,
const std::string& signal_name,
bool success);
const base::FilePath krb5_conf_path_;
const base::FilePath krb5_ccache_path_;
const std::string account_identifier_;
const std::unique_ptr<KerberosArtifactClientInterface> client_;
bool setup_called_ = false;
} // namespace smbfs