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/*
* Copyright (C) 2018 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.
*/
#ifndef HARDWARE_INTERFACES_KEYMASTER_40_SUPPORT_KEYMASTER_UTILS_H_
#define HARDWARE_INTERFACES_KEYMASTER_40_SUPPORT_KEYMASTER_UTILS_H_
#include <android/hardware/keymaster/4.0/types.h>
#include <optional>
#include <vector>
namespace android {
namespace hardware {
namespace keymaster {
namespace V4_0 {
/**
* Define a lexicographical ordering on HmacSharingParameters. The parameters to
* IKeymasterDevice::computeSharedHmac are required to be delivered in the order specified by this
* comparison operator.
*/
bool operator<(const HmacSharingParameters& a, const HmacSharingParameters& b);
namespace support {
inline static hidl_vec<uint8_t> blob2hidlVec(const uint8_t* data, const size_t length) {
hidl_vec<uint8_t> result(data, data + length);
return result;
}
inline static hidl_vec<uint8_t> blob2hidlVec(const std::string& value) {
hidl_vec<uint8_t> result(reinterpret_cast<const uint8_t*>(value.data()),
reinterpret_cast<const uint8_t*>(value.data()) + value.size());
return result;
}
inline static hidl_vec<uint8_t> blob2hidlVec(const std::vector<uint8_t>& blob) {
hidl_vec<uint8_t> result(blob.data(), blob.data() + static_cast<size_t>(blob.size()));
return result;
}
HardwareAuthToken hidlVec2AuthToken(const hidl_vec<uint8_t>& buffer);
hidl_vec<uint8_t> authToken2HidlVec(const HardwareAuthToken& token);
// Serializes and deserializes a verification token. This format is private and
// not stable between releases and should not be persisted to disk.
//
// Currently doesn't support the |parametersVerified| field, will fail if set.
//
std::optional<VerificationToken> deserializeVerificationToken(
const std::vector<uint8_t>& serializedToken);
std::optional<std::vector<uint8_t>> serializeVerificationToken(const VerificationToken& token);
uint32_t getOsVersion();
uint32_t getOsPatchlevel();
} // namespace support
} // namespace V4_0
} // namespace keymaster
} // namespace hardware
} // namespace android
#endif // HARDWARE_INTERFACES_KEYMASTER_40_SUPPORT_KEYMASTER_UTILS_H_
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