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// Copyright 2018 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 <base/callback.h>
#include "smbprovider/kerberos_artifact_client_interface.h"
namespace dbus {
class Signal;
} // namespace dbus
namespace smbprovider {
// 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 or
// Kerberos daemons and writes a copy to the tempfs. The Kerberos files are kept
// up-to-date by connecting to AuthPolicy's or Kerberos's D-Bus signal.
class KerberosArtifactSynchronizer {
using SetupKerberosCallback = base::Callback<void(bool setup_success)>;
const std::string& krb5_conf_path,
const std::string& krb5_ccache_path,
std::unique_ptr<KerberosArtifactClientInterface> client,
bool allow_credentials_update);
KerberosArtifactSynchronizer(const KerberosArtifactSynchronizer&) = delete;
KerberosArtifactSynchronizer& operator=(const KerberosArtifactSynchronizer&) =
// Sets up Keberos for user with |account_identifier|.
// |account_identifier| is run with the result. If |allow_credentials_update|
// is false it may only be called once per instance.
// If |account_identifier| is empty, credential files will not be created
// or will be removed.
void SetupKerberos(const std::string& account_identifier,
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,
const std::string& krb5_conf);
// Writes |kerberos_files| to |krb5_conf_path_| and |krb5_ccache_path_|
// respectively. If Kerberos is not yet fully setup, calls
// ConnectToKerberosFilesChangedSignal.
void WriteFiles(const std::string& krb5_ccache,
const std::string& krb5_conf,
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 std::string& path, const std::string& kerberos_file);
// Connects to the 'UserKerberosFilesChanged' D-Bus signal. Called by
// WriteFiles() on initial setup.
void ConnectToKerberosFilesChangedSignal(SetupKerberosCallback callback);
// 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);
// Remove Kerberos credential files.
void RemoveFiles(SetupKerberosCallback callback);
// Remove a file at a given |path|. Returns true if the remove succeeds,
// false if it fails.
bool RemoveFile(const std::string& path);
bool is_kerberos_setup_ = false;
const std::string krb5_conf_path_;
const std::string krb5_ccache_path_;
std::string account_identifier_;
std::unique_ptr<KerberosArtifactClientInterface> client_;
const bool allow_credentials_update_ = false;
} // namespace smbprovider