41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <algorithm>
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#include <array>
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#include <cstdint>
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namespace rootcanal::crypto {
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constexpr int kOctet16Length = 16;
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using Octet16 = std::array<uint8_t, kOctet16Length>;
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Octet16 aes_128(const Octet16& key, const Octet16& message);
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/* This function computes AES_128(key, message). |key| must be 128bit.
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* |message| can be at most 16 bytes long, its length in bytes is given in
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* |length| */
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inline Octet16 aes_128(const Octet16& key, const uint8_t* message,
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const uint8_t length) {
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Octet16 padded_message{0};
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std::copy(message, message + length, padded_message.begin());
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return aes_128(key, padded_message);
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}
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} // namespace rootcanal::crypto
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