mirror of
https://github.com/PurpleI2P/i2pd
synced 2024-11-10 08:00:38 +03:00
123 lines
3.4 KiB
C++
123 lines
3.4 KiB
C++
#include "I2PEndian.h"
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#include <cryptopp/dsa.h>
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#include "CryptoConst.h"
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#include "Log.h"
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#include "Timestamp.h"
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#include "NetDb.h"
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#include "TunnelPool.h"
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#include "LeaseSet.h"
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namespace i2p
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{
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namespace data
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{
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LeaseSet::LeaseSet (const uint8_t * buf, int len)
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{
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memcpy (m_Buffer, buf, len);
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m_BufferLen = len;
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ReadFromBuffer ();
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}
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LeaseSet::LeaseSet (const i2p::tunnel::TunnelPool& pool)
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{
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// header
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const i2p::data::LocalDestination& localDestination = pool.GetLocalDestination ();
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m_BufferLen = localDestination.GetIdentity ().ToBuffer (m_Buffer, MAX_LS_BUFFER_SIZE);
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memcpy (m_Buffer + m_BufferLen, localDestination.GetEncryptionPublicKey (), 256);
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m_BufferLen += 256;
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auto signingKeyLen = localDestination.GetIdentity ().GetSigningPublicKeyLen ();
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memset (m_Buffer + m_BufferLen, 0, signingKeyLen);
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m_BufferLen += signingKeyLen;
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auto tunnels = pool.GetInboundTunnels (5); // 5 tunnels maximum
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m_Buffer[m_BufferLen] = tunnels.size (); // num leases
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m_BufferLen++;
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// leases
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for (auto it: tunnels)
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{
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Lease * lease = (Lease *)(m_Buffer + m_BufferLen);
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memcpy (lease->tunnelGateway, it->GetNextIdentHash (), 32);
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lease->tunnelID = htobe32 (it->GetNextTunnelID ());
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uint64_t ts = it->GetCreationTime () + i2p::tunnel::TUNNEL_EXPIRATION_TIMEOUT - 60; // 1 minute before expiration
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ts *= 1000; // in milliseconds
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lease->endDate = htobe64 (ts);
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m_BufferLen += sizeof (Lease);
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}
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// signature
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localDestination.Sign (m_Buffer, m_BufferLen, m_Buffer + m_BufferLen);
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m_BufferLen += localDestination.GetIdentity ().GetSignatureLen ();
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LogPrint ("Local LeaseSet of ", tunnels.size (), " leases created");
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ReadFromBuffer ();
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}
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void LeaseSet::Update (const uint8_t * buf, int len)
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{
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m_Leases.clear ();
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memcpy (m_Buffer, buf, len);
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m_BufferLen = len;
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ReadFromBuffer ();
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}
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void LeaseSet::ReadFromBuffer ()
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{
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size_t size = m_Identity.FromBuffer (m_Buffer, m_BufferLen);
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memcpy (m_EncryptionKey, m_Buffer + size, 256);
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size += 256; // encryption key
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size += m_Identity.GetSigningPublicKeyLen (); // unused signing key
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uint8_t num = m_Buffer[size];
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size++; // num
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LogPrint ("LeaseSet num=", (int)num);
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// process leases
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const uint8_t * leases = m_Buffer + size;
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for (int i = 0; i < num; i++)
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{
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Lease lease = *(Lease *)leases;
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lease.tunnelID = be32toh (lease.tunnelID);
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lease.endDate = be64toh (lease.endDate);
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m_Leases.push_back (lease);
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leases += sizeof (Lease);
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// check if lease's gateway is in our netDb
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if (!netdb.FindRouter (lease.tunnelGateway))
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{
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// if not found request it
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LogPrint ("Lease's tunnel gateway not found. Requested");
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netdb.RequestDestination (lease.tunnelGateway);
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}
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}
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// verify
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if (!m_Identity.Verify (m_Buffer, leases - m_Buffer, leases))
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LogPrint ("LeaseSet verification failed");
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}
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const std::vector<Lease> LeaseSet::GetNonExpiredLeases () const
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{
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auto ts = i2p::util::GetMillisecondsSinceEpoch ();
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std::vector<Lease> leases;
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for (auto& it: m_Leases)
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if (ts < it.endDate)
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leases.push_back (it);
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return leases;
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}
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bool LeaseSet::HasExpiredLeases () const
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{
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auto ts = i2p::util::GetMillisecondsSinceEpoch ();
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for (auto& it: m_Leases)
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if (ts >= it.endDate) return true;
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return false;
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}
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bool LeaseSet::HasNonExpiredLeases () const
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{
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auto ts = i2p::util::GetMillisecondsSinceEpoch ();
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for (auto& it: m_Leases)
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if (ts < it.endDate) return true;
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return false;
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}
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}
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}
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