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handle LS2 in destinations

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orignal 2019-01-09 12:47:47 -05:00
parent b5596c4596
commit 5398b651f7
6 changed files with 85 additions and 39 deletions
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83
libi2pd/LeaseSet.cpp
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@ -12,8 +12,8 @@ namespace i2p
namespace data
{
LeaseSet::LeaseSet ():
m_IsValid (false), m_StoreLeases (false), m_ExpirationTime (0), m_Buffer (nullptr), m_BufferLen (0)
LeaseSet::LeaseSet (bool storeLeases):
m_IsValid (false), m_StoreLeases (storeLeases), m_ExpirationTime (0), m_Buffer (nullptr), m_BufferLen (0)
{
}
@ -69,12 +69,7 @@ namespace data
return;
}
// reset existing leases
if (m_StoreLeases)
for (auto& it: m_Leases)
it->isUpdated = false;
else
m_Leases.clear ();
UpdateLeasesBegin ();
// process leases
m_ExpirationTime = 0;
@ -98,6 +93,29 @@ namespace data
return;
}
m_ExpirationTime += LEASE_ENDDATE_THRESHOLD;
UpdateLeasesEnd ();
// verify
if (verifySignature && !m_Identity->Verify (m_Buffer, leases - m_Buffer, leases))
{
LogPrint (eLogWarning, "LeaseSet: verification failed");
m_IsValid = false;
}
}
void LeaseSet::UpdateLeasesBegin ()
{
// reset existing leases
if (m_StoreLeases)
for (auto& it: m_Leases)
it->isUpdated = false;
else
m_Leases.clear ();
}
void LeaseSet::UpdateLeasesEnd ()
{
// delete old leases
if (m_StoreLeases)
{
@ -112,13 +130,6 @@ namespace data
++it;
}
}
// verify
if (verifySignature && !m_Identity->Verify (m_Buffer, leases - m_Buffer, leases))
{
LogPrint (eLogWarning, "LeaseSet: verification failed");
m_IsValid = false;
}
}
void LeaseSet::UpdateLease (const Lease& lease, uint64_t ts)
@ -233,8 +244,8 @@ namespace data
memcpy (m_Buffer, buf, len);
}
LeaseSet2::LeaseSet2 (uint8_t storeType, const uint8_t * buf, size_t len):
m_StoreType (storeType)
LeaseSet2::LeaseSet2 (uint8_t storeType, const uint8_t * buf, size_t len, bool storeLeases):
LeaseSet (storeLeases), m_StoreType (storeType)
{
SetBuffer (buf, len);
if (storeType == NETDB_STORE_TYPE_ENCRYPTED_LEASESET2)
@ -317,26 +328,37 @@ namespace data
int numKeySections = buf[offset]; offset++;
for (int i = 0; i < numKeySections; i++)
{
// skip key for now. TODO: implement encryption key
offset += 2; // encryption key type
uint16_t keyType = bufbe16toh (buf + offset); offset += 2; // encryption key type
if (offset + 2 >= len) return 0;
uint16_t encryptionKeyLen = bufbe16toh (buf + offset); offset += 2;
if (offset + encryptionKeyLen >= len) return 0;
if (!m_Encryptor && IsStoreLeases ()) // create encryptor with leases only, first key
{
auto encryptor = i2p::data::IdentityEx::CreateEncryptor (keyType, buf + offset);
m_Encryptor = encryptor; // TODO: atomic
}
offset += encryptionKeyLen;
if (offset >= len) return 0;
}
// leases
if (offset + 1 >= len) return 0;
int numLeases = buf[offset]; offset++;
auto ts = i2p::util::GetMillisecondsSinceEpoch ();
for (int i = 0; i < numLeases; i++)
if (IsStoreLeases ())
{
if (offset + 40 > len) return 0;
Lease lease;
lease.tunnelGateway = buf + offset; offset += 32; // gateway
lease.tunnelID = bufbe32toh (buf + offset); offset += 4; // tunnel ID
lease.endDate = bufbe32toh (buf + offset)*1000LL; offset += 4; // end date
UpdateLease (lease, ts);
UpdateLeasesBegin ();
for (int i = 0; i < numLeases; i++)
{
if (offset + 40 > len) return 0;
Lease lease;
lease.tunnelGateway = buf + offset; offset += 32; // gateway
lease.tunnelID = bufbe32toh (buf + offset); offset += 4; // tunnel ID
lease.endDate = bufbe32toh (buf + offset)*1000LL; offset += 4; // end date
UpdateLease (lease, ts);
}
UpdateLeasesEnd ();
}
else
offset += numLeases*40; // 40 bytes per lease
return offset;
}
@ -410,6 +432,13 @@ namespace data
SetIsValid (verified);
}
void LeaseSet2::Encrypt (const uint8_t * data, uint8_t * encrypted, BN_CTX * ctx) const
{
auto encryptor = m_Encryptor; // TODO: atomic
if (encryptor)
encryptor->Encrypt (data, encrypted, ctx, true);
}
LocalLeaseSet::LocalLeaseSet (std::shared_ptr<const IdentityEx> identity, const uint8_t * encryptionPublicKey, std::vector<std::shared_ptr<i2p::tunnel::InboundTunnel> > tunnels):
m_ExpirationTime (0), m_Identity (identity)
{