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/*
* Copyright 2018 Google LLC
*
* 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.
*/
#include "fcp/secagg/client/secagg_client_r0_advertise_keys_input_not_set_state.h"
#include <cstdint>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "absl/container/node_hash_map.h"
#include "fcp/base/monitoring.h"
#include "fcp/secagg/client/secagg_client_aborted_state.h"
#include "fcp/secagg/client/secagg_client_completed_state.h"
#include "fcp/secagg/client/secagg_client_r0_advertise_keys_input_set_state.h"
#include "fcp/secagg/client/secagg_client_r1_share_keys_input_not_set_state.h"
#include "fcp/secagg/client/secagg_client_state.h"
#include "fcp/secagg/client/send_to_server_interface.h"
#include "fcp/secagg/client/state_transition_listener_interface.h"
#include "fcp/secagg/shared/aes_prng_factory.h"
#include "fcp/secagg/shared/ecdh_key_agreement.h"
#include "fcp/secagg/shared/input_vector_specification.h"
#include "fcp/secagg/shared/secagg_messages.pb.h"
#include "fcp/secagg/shared/secagg_vector.h"
namespace fcp {
namespace secagg {
SecAggClientR0AdvertiseKeysInputNotSetState::
SecAggClientR0AdvertiseKeysInputNotSetState(
uint32_t max_neighbors_expected,
uint32_t minimum_surviving_neighbors_for_reconstruction,
std::unique_ptr<std::vector<InputVectorSpecification> >
input_vector_specs,
std::unique_ptr<SecurePrng> prng,
std::unique_ptr<SendToServerInterface> sender,
std::unique_ptr<StateTransitionListenerInterface> transition_listener,
std::unique_ptr<AesPrngFactory> prng_factory, AsyncAbort* async_abort)
: SecAggClientAliveBaseState(std::move(sender),
std::move(transition_listener),
ClientState::R0_ADVERTISE_KEYS, async_abort),
max_neighbors_expected_(max_neighbors_expected),
minimum_surviving_neighbors_for_reconstruction_(
minimum_surviving_neighbors_for_reconstruction),
input_vector_specs_(std::move(input_vector_specs)),
prng_(std::move(prng)),
prng_factory_(std::move(prng_factory)) {}
SecAggClientR0AdvertiseKeysInputNotSetState::
~SecAggClientR0AdvertiseKeysInputNotSetState() = default;
StatusOr<std::unique_ptr<SecAggClientState> >
SecAggClientR0AdvertiseKeysInputNotSetState::Start() {
auto enc_key_agreement = EcdhKeyAgreement::CreateFromRandomKeys().value();
auto prng_key_agreement = EcdhKeyAgreement::CreateFromRandomKeys().value();
ClientToServerWrapperMessage message;
PairOfPublicKeys* public_keys =
message.mutable_advertise_keys()->mutable_pair_of_public_keys();
public_keys->set_enc_pk(enc_key_agreement->PublicKey().AsString());
public_keys->set_noise_pk(prng_key_agreement->PublicKey().AsString());
sender_->Send(&message);
return {std::make_unique<SecAggClientR1ShareKeysInputNotSetState>(
max_neighbors_expected_, minimum_surviving_neighbors_for_reconstruction_,
std::move(enc_key_agreement), std::move(input_vector_specs_),
std::move(prng_), std::move(prng_key_agreement), std::move(sender_),
std::move(transition_listener_), std::move(prng_factory_), async_abort_)};
}
StatusOr<std::unique_ptr<SecAggClientState> >
SecAggClientR0AdvertiseKeysInputNotSetState::HandleMessage(
const ServerToClientWrapperMessage& message) {
// Handle abort messages only.
if (message.has_abort()) {
if (message.abort().early_success()) {
return {std::make_unique<SecAggClientCompletedState>(
std::move(sender_), std::move(transition_listener_))};
} else {
return {std::make_unique<SecAggClientAbortedState>(
"Aborting because of abort message from the server.",
std::move(sender_), std::move(transition_listener_))};
}
} else {
// Returns an error indicating that the message is of invalid type.
return SecAggClientState::HandleMessage(message);
}
}
StatusOr<std::unique_ptr<SecAggClientState> >
SecAggClientR0AdvertiseKeysInputNotSetState::SetInput(
std::unique_ptr<SecAggVectorMap> input_map) {
if (!ValidateInput(*input_map, *input_vector_specs_)) {
return FCP_STATUS(INVALID_ARGUMENT)
<< "The input to SetInput does not match the "
"InputVectorSpecification.";
}
return {std::make_unique<SecAggClientR0AdvertiseKeysInputSetState>(
max_neighbors_expected_, minimum_surviving_neighbors_for_reconstruction_,
std::move(input_map), std::move(input_vector_specs_), std::move(prng_),
std::move(sender_), std::move(transition_listener_),
std::move(prng_factory_), async_abort_)};
}
std::string SecAggClientR0AdvertiseKeysInputNotSetState::StateName() const {
return "R0_ADVERTISE_KEYS_INPUT_NOT_SET";
}
} // namespace secagg
} // namespace fcp
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