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/*
* Copyright (C) 2017 Team Win Recovery Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* To the best of my knowledge there is no native implementation for
* Weaver so I made this by looking at the IWeaver.h file that gets
* compiled by the build system. I took the information from this header
* file and looked at keymaster source to get an idea of the proper way
* to write the functions.
*/
#ifndef TWRP_WEAVER_H
#define TWRP_WEAVER_H
#include <memory>
#include <string>
#include <utility>
#include <android/hardware/weaver/1.0/IWeaver.h>
#include "Utils.h"
namespace android {
namespace vold {
using ::android::hardware::weaver::V1_0::IWeaver;
// Wrapper for a Weaver device
class Weaver {
public:
Weaver();
// false if we failed to open the weaver device.
explicit operator bool() { return mDevice.get() != nullptr; }
bool GetSlots(uint32_t* slots);
bool GetKeySize(uint32_t* keySize);
bool GetValueSize(uint32_t* valueSize);
// TODO: we should return more information about the status including time delays before the next retry
bool WeaverVerify(const uint32_t slot, const void* weaver_key, std::vector<uint8_t>* payload);
private:
sp<hardware::weaver::V1_0::IWeaver> mDevice;
hardware::weaver::V1_0::WeaverConfig config;
bool GottenConfig;
bool GetConfig();
DISALLOW_COPY_AND_ASSIGN(Weaver);
};
} // namespace vold
} // namespace android
#endif
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