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/*
* Copyright 2021 The Android Open Source 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.
*/
#pragma once
#include <array>
#include <optional>
#include <string>
#include <tuple>
#include <vector>
#include <cppbor.h>
#include <keymaster/android_keymaster_messages.h>
#include <keymaster/cppcose/cppcose.h>
namespace keymaster {
class RemoteProvisioningContext {
public:
RemoteProvisioningContext() {}
virtual ~RemoteProvisioningContext(){};
virtual std::vector<uint8_t> DeriveBytesFromHbk(const std::string& context,
size_t numBytes) const = 0;
virtual std::unique_ptr<cppbor::Map> CreateDeviceInfo(uint32_t csrVersion) const = 0;
virtual cppcose::ErrMsgOr<std::vector<uint8_t>>
BuildProtectedDataPayload(bool testMode, //
const std::vector<uint8_t>& macKey, //
const std::vector<uint8_t>& aad) const = 0;
// Generate an HMAC-SHA256 over the given input. This is used to verify a given
// input hasn't changed across multiple calls to the remote provisioning HAL.
virtual std::optional<cppcose::HmacSha256>
GenerateHmacSha256(const cppcose::bytevec& input) const = 0;
virtual void GetHwInfo(GetHwInfoResponse* hwInfo) const = 0;
virtual cppcose::ErrMsgOr<cppbor::Array> BuildCsr(const std::vector<uint8_t>& challenge,
cppbor::Array keysToSign) const = 0;
private:
// Uncopyable.
RemoteProvisioningContext(const RemoteProvisioningContext&);
void operator=(const RemoteProvisioningContext&);
};
} // namespace keymaster
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