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 <cstdint>
20 #include <mutex>
21 
22 #include <aidl/android/hardware/security/sharedsecret/BnSharedSecret.h>
23 #include <aidl/android/hardware/security/sharedsecret/SharedSecretParameters.h>
24 #include <keymaster/km_openssl/soft_keymaster_enforcement.h>
25 
26 namespace aidl::android::hardware::security::sharedsecret {
27 
28 class SoftSharedSecret : public BnSharedSecret {
29   public:
30     ::ndk::ScopedAStatus getSharedSecretParameters(SharedSecretParameters* params) override;
31     ::ndk::ScopedAStatus computeSharedSecret(const std::vector<SharedSecretParameters>& params,
32                                              std::vector<uint8_t>* sharingCheck) override;
33 
34     keymaster::KeymasterKeyBlob HmacKey() const;
35 
36   private:
37     mutable std::mutex mutex_;
38     std::vector<std::uint8_t> seed_;
39     std::vector<std::uint8_t> nonce_;
40     keymaster::KeymasterKeyBlob hmac_key_;
41 };
42 
43 }  // namespace aidl::android::hardware::security::sharedsecret
44