1 /* 2 * Copyright 2018 Google LLC 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef FCP_SECAGG_CLIENT_SECAGG_CLIENT_R3_UNMASKING_STATE_H_ 18 #define FCP_SECAGG_CLIENT_SECAGG_CLIENT_R3_UNMASKING_STATE_H_ 19 20 #include <cstdint> 21 #include <memory> 22 #include <set> 23 #include <string> 24 25 #include "fcp/base/monitoring.h" 26 #include "fcp/secagg/client/other_client_state.h" 27 #include "fcp/secagg/client/secagg_client_alive_base_state.h" 28 #include "fcp/secagg/client/secagg_client_state.h" 29 #include "fcp/secagg/client/send_to_server_interface.h" 30 #include "fcp/secagg/client/state_transition_listener_interface.h" 31 #include "fcp/secagg/shared/secagg_messages.pb.h" 32 #include "fcp/secagg/shared/shamir_secret_sharing.h" 33 34 namespace fcp { 35 namespace secagg { 36 37 // This class represents the client's Round 3: Unmasking state. This state 38 // should transition to the Completed state, but can also transition to the 39 // Aborted state. 40 41 class SecAggClientR3UnmaskingState : public SecAggClientAliveBaseState { 42 public: 43 SecAggClientR3UnmaskingState( 44 uint32_t client_id, uint32_t number_of_alive_neighbors, 45 uint32_t minimum_surviving_neighbors_for_reconstruction, 46 uint32_t number_of_neighbors, 47 std::unique_ptr<std::vector<OtherClientState> > other_client_states, 48 std::unique_ptr<std::vector<ShamirShare> > pairwise_key_shares, 49 std::unique_ptr<std::vector<ShamirShare> > self_key_shares, 50 std::unique_ptr<SendToServerInterface> sender, 51 std::unique_ptr<StateTransitionListenerInterface> transition_listener, 52 53 AsyncAbort* async_abort = nullptr); 54 55 ~SecAggClientR3UnmaskingState() override; 56 57 StatusOr<std::unique_ptr<SecAggClientState> > HandleMessage( 58 const ServerToClientWrapperMessage& message) override; 59 60 // Returns the name of this state, "R3_UNMASKING". 61 std::string StateName() const override; 62 63 private: 64 const uint32_t client_id_; 65 uint32_t number_of_alive_neighbors_; 66 const uint32_t minimum_surviving_neighbors_for_reconstruction_; 67 const uint32_t number_of_neighbors_; 68 std::unique_ptr<std::vector<OtherClientState> > other_client_states_; 69 std::unique_ptr<std::vector<ShamirShare> > pairwise_key_shares_; 70 std::unique_ptr<std::vector<ShamirShare> > self_key_shares_; 71 }; 72 73 } // namespace secagg 74 } // namespace fcp 75 76 #endif // FCP_SECAGG_CLIENT_SECAGG_CLIENT_R3_UNMASKING_STATE_H_ 77