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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* 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 <hicn/transport/interfaces/socket_consumer.h>
#include <hicn/transport/security/verifier.h>
#include <implementation/socket_consumer.h>
#include <protocols/verification_manager.h>
namespace transport {
namespace protocol {
interface::VerificationPolicy SignatureVerificationManager::onPacketToVerify(
const Packet& packet) {
using namespace interface;
bool verify_signature = false, key_content = false;
VerificationPolicy ret = VerificationPolicy::DROP_PACKET;
icn_socket_->getSocketOption(GeneralTransportOptions::VERIFY_SIGNATURE,
verify_signature);
icn_socket_->getSocketOption(GeneralTransportOptions::KEY_CONTENT,
key_content);
if (!verify_signature) {
return VerificationPolicy::ACCEPT_PACKET;
}
if (key_content) {
key_packets_.push(copyPacket(packet));
return VerificationPolicy::ACCEPT_PACKET;
} else if (!key_packets_.empty()) {
std::queue<ContentObjectPtr>().swap(key_packets_);
}
ConsumerContentObjectVerificationFailedCallback*
verification_failed_callback = VOID_HANDLER;
icn_socket_->getSocketOption(ConsumerCallbacksOptions::VERIFICATION_FAILED,
&verification_failed_callback);
if (!verification_failed_callback) {
throw errors::RuntimeException(
"No verification failed callback provided by application. "
"Aborting.");
}
std::shared_ptr<utils::Verifier> verifier;
icn_socket_->getSocketOption(GeneralTransportOptions::VERIFIER, verifier);
if (TRANSPORT_EXPECT_FALSE(!verifier)) {
ret = (*verification_failed_callback)(
*icn_socket_->getInterface(),
dynamic_cast<const ContentObject&>(packet),
make_error_code(protocol_error::no_verifier_provided));
return ret;
}
if (!verifier->verify(packet)) {
ret = (*verification_failed_callback)(
*icn_socket_->getInterface(),
dynamic_cast<const ContentObject&>(packet),
make_error_code(protocol_error::signature_verification_failed));
} else {
ret = VerificationPolicy::ACCEPT_PACKET;
}
return ret;
}
bool SignatureVerificationManager::onKeyToVerify() {
if (TRANSPORT_EXPECT_FALSE(key_packets_.empty())) {
throw errors::RuntimeException("No key to verify.");
}
while (!key_packets_.empty()) {
ContentObjectPtr packet_to_verify = key_packets_.front();
key_packets_.pop();
if (onPacketToVerify(*packet_to_verify) !=
VerificationPolicy::ACCEPT_PACKET)
return false;
}
return true;
}
} // end namespace protocol
} // end namespace transport
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