1 // 2 // Copyright (C) 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 #pragma once 17 18 #include <string> 19 20 #include <json/json.h> 21 #include <tss2/tss2_tpm2_types.h> 22 23 /** 24 * Data storage tailored to Gatekeeper's storage needs: storing binary blobs 25 * that can be destroyed without a trace or corrupted with an obvious trace, but 26 * not silently tampered with or read by an unauthorized user. 27 * 28 * Data can be stored through Write and retrieved through Read. To delete data, 29 * issue a Write that overwrites the data to destroy it. 30 */ 31 class GatekeeperStorage { 32 public: 33 virtual ~GatekeeperStorage() = default; 34 35 virtual bool Allocate(const Json::Value& key, uint16_t size) = 0; 36 virtual bool HasKey(const Json::Value& key) const = 0; 37 38 virtual std::unique_ptr<TPM2B_MAX_NV_BUFFER> Read(const Json::Value& key) 39 const = 0; 40 virtual bool Write(const Json::Value& key, const TPM2B_MAX_NV_BUFFER& data) 41 = 0; 42 }; 43