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72 lines
2.6 KiB
C++
72 lines
2.6 KiB
C++
// Copyright (c) 2019-2023 The Dash Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_EVO_MNAUTH_H
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#define BITCOIN_EVO_MNAUTH_H
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#include <bls/bls.h>
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#include <net_types.h>
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#include <serialize.h>
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class CActiveMasternodeManager;
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class CBlockIndex;
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class CChain;
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class CConnman;
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class CDataStream;
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class CDeterministicMN;
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class CDeterministicMNList;
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class CDeterministicMNListDiff;
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class CDeterministicMNManager;
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class CMasternodeMetaMan;
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class CMasternodeSync;
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class CNode;
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class UniValue;
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enum ServiceFlags : uint64_t;
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/**
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* This class handles the p2p message MNAUTH. MNAUTH is sent directly after VERACK and authenticates the sender as a
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* masternode. It is only sent when the sender is actually a masternode.
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*
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* MNAUTH signs a challenge that was previously sent via VERSION. The challenge is signed differently depending on
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* the connection being an inbound or outbound connection, which avoids MITM of this form:
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* node1 <- Eve -> node2
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* while still allowing:
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* node1 -> Eve -> node2
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*
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* This is fine as we only use this mechanism for DoS protection. It allows us to keep masternode connections open for
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* a very long time without evicting the connections when inbound connection limits are hit (non-MNs will then be evicted).
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*
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* If we ever want to add transfer of sensitive data, THIS AUTHENTICATION MECHANISM IS NOT ENOUGH!! We'd need to implement
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* proper encryption for these connections first.
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*/
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class CMNAuth
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{
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public:
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uint256 proRegTxHash;
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CBLSSignature sig;
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SERIALIZE_METHODS(CMNAuth, obj)
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{
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READWRITE(obj.proRegTxHash, obj.sig);
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}
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static void PushMNAUTH(CNode& peer, CConnman& connman, const CActiveMasternodeManager& mn_activeman,
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const CBlockIndex* tip);
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/**
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* @pre CMasternodeMetaMan's database must be successfully loaded before
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* attempting to call this function regardless of sync state
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*/
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static PeerMsgRet ProcessMessage(CNode& peer, ServiceFlags node_services, CConnman& connman, CMasternodeMetaMan& mn_metaman, const CActiveMasternodeManager* const mn_activeman,
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const CChain& active_chain, const CMasternodeSync& mn_sync, const CDeterministicMNList& tip_mn_list,
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std::string_view msg_type, CDataStream& vRecv);
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static void NotifyMasternodeListChanged(bool undo, const CDeterministicMNList& oldMNList, const CDeterministicMNListDiff& diff, CConnman& connman);
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};
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#endif // BITCOIN_EVO_MNAUTH_H
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