mirror of
https://github.com/PurpleI2P/i2pd
synced 2024-11-10 08:00:38 +03:00
87 lines
2.1 KiB
C++
87 lines
2.1 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 "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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#pragma pack(1)
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struct H
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{
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Identity destination;
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uint8_t encryptionKey[256];
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uint8_t signingKey[128];
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uint8_t num;
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};
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#pragma pack ()
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const H * header = (const H *)buf;
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m_Identity = header->destination;
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m_IdentHash = CalculateIdentHash (m_Identity);
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memcpy (m_EncryptionKey, header->encryptionKey, 256);
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LogPrint ("LeaseSet num=", (int)header->num);
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// process leases
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const uint8_t * leases = buf + sizeof (H);
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for (int i = 0; i < header->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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CryptoPP::DSA::PublicKey pubKey;
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pubKey.Initialize (i2p::crypto::dsap, i2p::crypto::dsaq, i2p::crypto::dsag,
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CryptoPP::Integer (m_Identity.signingKey, 128));
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CryptoPP::DSA::Verifier verifier (pubKey);
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if (!verifier.VerifyMessage (buf, leases - buf, leases, 40))
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LogPrint ("LeaseSet verification failed");
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}
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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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