1 /*
2  * Copyright 2020 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 #pragma once
18 
19 #include <keymaster/android_keymaster_messages.h>
20 #include <keymaster/serializable.h>
21 
22 #include "common/libs/fs/shared_fd.h"
23 #include "common/libs/security/keymaster_channel.h"
24 
25 namespace cuttlefish {
26 
27 /*
28  * Interface for communication channels that synchronously communicate Keymaster
29  * IPC/RPC calls. Sends messages over a file descriptor.
30  */
31 class SharedFdKeymasterChannel : public KeymasterChannel {
32  public:
33   SharedFdKeymasterChannel(SharedFD input, SharedFD output);
34 
35   bool SendRequest(AndroidKeymasterCommand command,
36                    const keymaster::Serializable& message) override;
37   bool SendResponse(AndroidKeymasterCommand command,
38                     const keymaster::Serializable& message) override;
39   ManagedKeymasterMessage ReceiveMessage() override;
40 
41  private:
42   SharedFD input_;
43   SharedFD output_;
44   bool SendMessage(keymaster::AndroidKeymasterCommand command, bool response,
45                    const keymaster::Serializable& message);
46 };
47 
48 }  // namespace cuttlefish