1 //
2 // Copyright (C) 2015 The Android Open Source Project
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 //      http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 //
16 
17 #ifndef TPM_MANAGER_CLIENT_TPM_NVRAM_DBUS_PROXY_H_
18 #define TPM_MANAGER_CLIENT_TPM_NVRAM_DBUS_PROXY_H_
19 
20 #include "tpm_manager/common/tpm_nvram_interface.h"
21 
22 #include <string>
23 
24 #include <base/macros.h>
25 #include <base/memory/ref_counted.h>
26 #include <dbus/bus.h>
27 #include <dbus/object_proxy.h>
28 
29 #include "tpm_manager/common/export.h"
30 
31 namespace tpm_manager {
32 
33 // An implementation of TpmNvramInterface that forwards requests to
34 // tpm_managerd over D-Bus.
35 // Usage:
36 // std::unique_ptr<TpmNvramInterface> tpm_manager = new TpmNvramDBusProxy();
37 // tpm_manager->DefineSpace(...);
38 class TPM_MANAGER_EXPORT TpmNvramDBusProxy : public TpmNvramInterface {
39  public:
40   TpmNvramDBusProxy() = default;
41   virtual ~TpmNvramDBusProxy();
42 
43   // Performs initialization tasks. This method must be called before calling
44   // any other method in this class. Returns true on success.
45   bool Initialize();
46 
47   // TpmNvramInterface methods.
48   void DefineSpace(const DefineSpaceRequest& request,
49                    const DefineSpaceCallback& callback) override;
50   void DestroySpace(const DestroySpaceRequest& request,
51                     const DestroySpaceCallback& callback) override;
52   void WriteSpace(const WriteSpaceRequest& request,
53                   const WriteSpaceCallback& callback) override;
54   void ReadSpace(const ReadSpaceRequest& request,
55                  const ReadSpaceCallback& callback) override;
56   void LockSpace(const LockSpaceRequest& request,
57                  const LockSpaceCallback& callback) override;
58   void ListSpaces(const ListSpacesRequest& request,
59                   const ListSpacesCallback& callback) override;
60   void GetSpaceInfo(const GetSpaceInfoRequest& request,
61                     const GetSpaceInfoCallback& callback) override;
62 
set_object_proxy(dbus::ObjectProxy * object_proxy)63   void set_object_proxy(dbus::ObjectProxy* object_proxy) {
64     object_proxy_ = object_proxy;
65   }
66 
67  private:
68   // Template method to call a given |method_name| remotely via dbus.
69   template <typename ReplyProtobufType,
70             typename RequestProtobufType,
71             typename CallbackType>
72   void CallMethod(const std::string& method_name,
73                   const RequestProtobufType& request,
74                   const CallbackType& callback);
75 
76   scoped_refptr<dbus::Bus> bus_;
77   dbus::ObjectProxy* object_proxy_;
78   DISALLOW_COPY_AND_ASSIGN(TpmNvramDBusProxy);
79 };
80 
81 }  // namespace tpm_manager
82 
83 #endif  // TPM_MANAGER_CLIENT_TPM_NVRAM_DBUS_PROXY_H_
84