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create LeaseSet from local tunnel pool

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orignal 2014-07-29 13:44:54 -04:00
parent 4236299879
commit ee2297c851
8 changed files with 72 additions and 25 deletions
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58
LeaseSet.cpp
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@ -4,6 +4,7 @@
#include "Log.h"
#include "Timestamp.h"
#include "NetDb.h"
#include "TunnelPool.h"
#include "LeaseSet.h"
namespace i2p
@ -13,35 +14,60 @@ namespace data
LeaseSet::LeaseSet (const uint8_t * buf, int len)
{
ReadFromBuffer (buf, len);
memcpy (m_Buffer, buf, len);
m_BufferLen = len;
ReadFromBuffer ();
}
LeaseSet::LeaseSet (const i2p::tunnel::TunnelPool& pool)
{
m_BufferLen = 0;
// header
const i2p::data::LocalDestination& localDestination = pool.GetLocalDestination ();
LeaseSetHeader * header = (LeaseSetHeader *)m_Buffer;
header->destination = localDestination.GetIdentity ();
memcpy (header->encryptionKey, localDestination.GetEncryptionPublicKey (), 256);
memset (header->signingKey, 0, 128);
auto tunnels = pool.GetInboundTunnels (5); // 5 tunnels maximum
header->num = tunnels.size (); // num leases
m_BufferLen += sizeof (LeaseSetHeader);
// leases
for (auto it: tunnels)
{
Lease * lease = (Lease *)(m_Buffer + m_BufferLen);
memcpy (lease->tunnelGateway, it->GetNextIdentHash (), 32);
lease->tunnelID = htobe32 (it->GetNextTunnelID ());
uint64_t ts = it->GetCreationTime () + i2p::tunnel::TUNNEL_EXPIRATION_TIMEOUT - 60; // 1 minute before expiration
ts *= 1000; // in milliseconds
lease->endDate = htobe64 (ts);
m_BufferLen += sizeof (Lease);
}
// signature
localDestination.Sign (m_Buffer, m_BufferLen, m_Buffer + m_BufferLen);
m_BufferLen += 40;
LogPrint ("Local LeaseSet of ", tunnels.size (), " leases created");
ReadFromBuffer ();
}
void LeaseSet::Update (const uint8_t * buf, int len)
{
m_Leases.clear ();
ReadFromBuffer (buf, len);
memcpy (m_Buffer, buf, len);
m_BufferLen = len;
ReadFromBuffer ();
}
void LeaseSet::ReadFromBuffer (const uint8_t * buf, int len)
void LeaseSet::ReadFromBuffer ()
{
#pragma pack(1)
struct H
{
Identity destination;
uint8_t encryptionKey[256];
uint8_t signingKey[128];
uint8_t num;
};
#pragma pack ()
const H * header = (const H *)buf;
const LeaseSetHeader * header = (const LeaseSetHeader *)m_Buffer;
m_Identity = header->destination;
m_IdentHash = m_Identity.Hash();
memcpy (m_EncryptionKey, header->encryptionKey, 256);
LogPrint ("LeaseSet num=", (int)header->num);
// process leases
const uint8_t * leases = buf + sizeof (H);
const uint8_t * leases = m_Buffer + sizeof (LeaseSetHeader);
for (int i = 0; i < header->num; i++)
{
Lease lease = *(Lease *)leases;
@ -64,7 +90,7 @@ namespace data
pubKey.Initialize (i2p::crypto::dsap, i2p::crypto::dsaq, i2p::crypto::dsag,
CryptoPP::Integer (m_Identity.signingKey, 128));
CryptoPP::DSA::Verifier verifier (pubKey);
if (!verifier.VerifyMessage (buf, leases - buf, leases, 40))
if (!verifier.VerifyMessage (m_Buffer, leases - m_Buffer, leases, 40))
LogPrint ("LeaseSet verification failed");
}