82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
/*
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* Copyright (C) 2016 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 <android/hidl/token/1.0/ITokenManager.h>
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#include <chrono>
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#include <hidl/MQDescriptor.h>
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#include <hidl/Status.h>
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#include <unordered_map>
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#include <array>
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namespace android {
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namespace hidl {
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namespace token {
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namespace V1_0 {
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namespace implementation {
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using ::android::hidl::base::V1_0::IBase;
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using ::android::hidl::token::V1_0::ITokenManager;
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using ::android::hardware::hidl_array;
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using ::android::hardware::hidl_string;
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using ::android::hardware::hidl_vec;
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using ::android::hardware::Return;
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using ::android::hardware::Void;
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using ::android::sp;
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struct TokenManager : public ITokenManager {
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TokenManager();
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// Methods from ::android::hidl::token::V1_0::ITokenManager follow.
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Return<void> createToken(const sp<IBase>& store, createToken_cb hidl_cb) override;
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Return<bool> unregister(const hidl_vec<uint8_t> &token) override;
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Return<sp<IBase>> get(const hidl_vec<uint8_t> &token) override;
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private:
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static constexpr uint64_t KEY_SIZE = 16;
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static constexpr uint64_t TOKEN_ID_NONE = 0;
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static bool constantTimeCompare(const hidl_vec<uint8_t> &t1, const hidl_vec<uint8_t> &t2);
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static hidl_vec<uint8_t> makeToken(const uint64_t id, const uint8_t *hmac, uint64_t hmacSize);
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static uint64_t getTokenId(const hidl_vec<uint8_t> &token);
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std::array<uint8_t, KEY_SIZE> mKey;
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struct TokenInterface {
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sp<IBase> interface;
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uint64_t id;
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hidl_vec<uint8_t> token; // First eight bytes are tokenId. Remaining bytes are hmac.
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};
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TokenInterface generateToken(const sp<IBase> &interface);
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// verifies token, returns iterator into mMap
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std::unordered_map<uint64_t, TokenInterface>::const_iterator
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lookupToken(const hidl_vec<uint8_t> &token);
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std::unordered_map<uint64_t, TokenInterface> mMap; // map getTokenId(i.token) -> i
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uint64_t mTokenIndex = TOKEN_ID_NONE; // last token index
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};
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} // namespace implementation
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} // namespace V1_0
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} // namespace token
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} // namespace hidl
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} // namespace android
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