mirror of
https://github.com/kidfromjupiter/nearby.git
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121 lines
4.5 KiB
C++
121 lines
4.5 KiB
C++
// Copyright 2022-2023 Google LLC
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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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// https://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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#ifndef THIRD_PARTY_NEARBY_SHARING_PAIRED_KEY_VERIFICATION_RUNNER_H_
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#define THIRD_PARTY_NEARBY_SHARING_PAIRED_KEY_VERIFICATION_RUNNER_H_
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#include <stdint.h>
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#include <functional>
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#include <memory>
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#include <optional>
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#include <vector>
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#include "absl/base/nullability.h"
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#include "absl/functional/any_invocable.h"
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#include "absl/time/time.h"
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#include "internal/platform/clock.h"
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#include "proto/sharing_enums.pb.h"
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#include "sharing/certificates/nearby_share_certificate_manager.h"
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#include "sharing/certificates/nearby_share_decrypted_public_certificate.h"
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#include "sharing/incoming_frames_reader.h"
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#include "sharing/proto/enums.pb.h"
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#include "sharing/proto/wire_format.pb.h"
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namespace nearby::sharing {
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class PairedKeyVerificationRunner
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: public std::enable_shared_from_this<PairedKeyVerificationRunner> {
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public:
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enum class PairedKeyVerificationResult {
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// Succeeded with verification.
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kSuccess,
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// Failed to verify.
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kFail,
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// Unable to verify. Occurs when missing proper certificates.
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kUnable,
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};
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struct VisibilityHistory {
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proto::DeviceVisibility visibility;
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proto::DeviceVisibility last_visibility;
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absl::Time last_visibility_time;
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// Set to true if device is advertising under lock screen.
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bool screen_locked_advertising = false;
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};
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PairedKeyVerificationRunner(
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Clock* absl_nonnull clock,
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location::nearby::proto::sharing::OSType os_type,
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bool share_target_is_incoming,
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const VisibilityHistory& visibility_history,
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const std::vector<uint8_t>& token,
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absl::AnyInvocable<
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void(const nearby::sharing::service::proto::Frame& frame)>
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frame_writer,
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const std::optional<NearbyShareDecryptedPublicCertificate>& certificate,
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NearbyShareCertificateManager* absl_nonnull certificate_manager,
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IncomingFramesReader* absl_nonnull frames_reader,
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absl::Duration read_frame_timeout);
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~PairedKeyVerificationRunner();
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void Run(std::function<
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void(PairedKeyVerificationResult verification_result,
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::location::nearby::proto::sharing::OSType remote_os_type)>
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callback);
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std::weak_ptr<PairedKeyVerificationRunner> GetWeakPtr() {
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return this->weak_from_this();
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}
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private:
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void SendPairedKeyEncryptionFrame();
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void OnReadPairedKeyEncryptionFrame(
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std::optional<nearby::sharing::service::proto::V1Frame> frame);
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void OnReadPairedKeyResultFrame(
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std::optional<nearby::sharing::service::proto::V1Frame> frame);
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void SendPairedKeyResultFrame(PairedKeyVerificationResult result);
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// Verifies auth token hash in frame using private certificates in
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// `visibility_history_`. Returns either kSuccess or kUnable. This function
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// never returns kFail.
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PairedKeyVerificationResult VerifyAuthTokenHashWithPrivateCertificates(
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const nearby::sharing::service::proto::V1Frame& frame);
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PairedKeyVerificationResult VerifyPairedKeyEncryptionFrame(
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const nearby::sharing::service::proto::V1Frame& frame);
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void ApplyResult(PairedKeyVerificationResult result);
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// True if visibility has changed recently.
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bool IsVisibilityRecentlyUpdated() const;
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nearby::Clock& clock_;
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NearbyShareCertificateManager& certificate_manager_;
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IncomingFramesReader& frames_reader_;
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const bool share_target_is_incoming_;
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const location::nearby::proto::sharing::OSType os_type_;
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const VisibilityHistory visibility_history_;
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const std::optional<NearbyShareDecryptedPublicCertificate> certificate_;
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const absl::Duration read_frame_timeout_;
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std::vector<uint8_t> raw_token_;
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absl::AnyInvocable<void(const nearby::sharing::service::proto::Frame& frame)>
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frame_writer_;
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std::function<void(PairedKeyVerificationResult,
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::location::nearby::proto::sharing::OSType)>
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callback_;
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PairedKeyVerificationResult verification_result_;
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};
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} // namespace nearby::sharing
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#endif // THIRD_PARTY_NEARBY_SHARING_PAIRED_KEY_VERIFICATION_RUNNER_H_
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