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I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
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86 lines
2.1 KiB
86 lines
2.1 KiB
#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 = m_Identity.Hash(); |
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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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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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