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Create and send local LeaseSet

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orignal 2013-12-30 20:46:33 -05:00
parent 808d6d1fbf
commit 24ad255053
4 changed files with 137 additions and 42 deletions
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78
Garlic.cpp
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@ -29,7 +29,7 @@ namespace garlic
delete[] m_SessionTags;
}
I2NPMessage * GarlicRoutingSession::WrapSingleMessage (I2NPMessage * msg)
I2NPMessage * GarlicRoutingSession::WrapSingleMessage (I2NPMessage * msg, I2NPMessage * leaseSet)
{
I2NPMessage * m = NewI2NPMessage ();
size_t len = 0;
@ -46,7 +46,7 @@ namespace garlic
buf += 514;
// AES block
m_Encryption.SetKeyWithIV (m_SessionKey, 32, iv);
len += 514 + CreateAESBlock (buf, msg);
len += 514 + CreateAESBlock (buf, msg, leaseSet);
}
else // existing session
{
@ -57,7 +57,7 @@ namespace garlic
CryptoPP::SHA256().CalculateDigest(iv, m_SessionTags + m_NextTag*32, 32);
m_Encryption.SetKeyWithIV (m_SessionKey, 32, iv);
// AES block
len += 32 + CreateAESBlock (buf, msg);
len += 32 + CreateAESBlock (buf, msg, leaseSet);
}
m_NextTag++;
*(uint32_t *)(m->GetPayload ()) = htobe32 (len);
@ -67,7 +67,7 @@ namespace garlic
return m;
}
size_t GarlicRoutingSession::CreateAESBlock (uint8_t * buf, I2NPMessage * msg)
size_t GarlicRoutingSession::CreateAESBlock (uint8_t * buf, I2NPMessage * msg, I2NPMessage * leaseSet)
{
size_t blockSize = 0;
*(uint16_t *)buf = htobe16 (m_NumTags); // tag count
@ -80,7 +80,7 @@ namespace garlic
blockSize += 32;
buf[blockSize] = 0; // flag
blockSize++;
size_t len = CreateGarlicPayload (buf + blockSize, msg);
size_t len = CreateGarlicPayload (buf + blockSize, msg, leaseSet);
*payloadSize = htobe32 (len);
CryptoPP::SHA256().CalculateDigest(payloadHash, buf + blockSize, len);
blockSize += len;
@ -91,32 +91,25 @@ namespace garlic
return blockSize;
}
size_t GarlicRoutingSession::CreateGarlicPayload (uint8_t * payload, I2NPMessage * msg)
size_t GarlicRoutingSession::CreateGarlicPayload (uint8_t * payload, I2NPMessage * msg, I2NPMessage * leaseSet)
{
uint64_t ts = i2p::util::GetMillisecondsSinceEpoch () + 5000; // 5 sec
size_t size = 0;
payload[size] = 1; // 1 clove
uint8_t * numCloves = payload + size;
*numCloves = 0;
size++;
if (m_Destination->IsDestination ())
{
payload[size] = eGarlicDeliveryTypeDestination << 5;// delivery instructions flag destination
size++;
memcpy (payload + size, m_Destination->GetIdentHash (), 32);
size += 32;
}
else
if (leaseSet) // first clove is our leaseSet if presented
{
payload[size] = 0;// delivery instructions flag local
size++;
}
memcpy (payload + size, msg->GetBuffer (), msg->GetLength ());
size += msg->GetLength ();
*(uint32_t *)(payload + size) = htobe32 (m_Rnd.GenerateWord32 ()); // CloveID
size += 4;
*(uint64_t *)(payload + size) = htobe64 (ts); // Expiration of clove
size += 8;
memset (payload + size, 0, 3); // certificate of clove
size += 3;
size += CreateGarlicClove (payload + size, leaseSet, false);
(*numCloves)++;
}
if (msg) // next clove message ifself if presented
{
size += CreateGarlicClove (payload + size, msg, true);
(*numCloves)++;
}
memset (payload + size, 0, 3); // certificate of message
size += 3;
*(uint32_t *)(payload + size) = htobe32 (m_Rnd.GenerateWord32 ()); // MessageID
@ -126,6 +119,34 @@ namespace garlic
return size;
}
size_t GarlicRoutingSession::CreateGarlicClove (uint8_t * buf, I2NPMessage * msg, bool isDestination)
{
uint64_t ts = i2p::util::GetMillisecondsSinceEpoch () + 5000; // 5 sec
size_t size = 0;
if (isDestination)
{
buf[size] = eGarlicDeliveryTypeDestination << 5;// delivery instructions flag destination
size++;
memcpy (buf + size, m_Destination->GetIdentHash (), 32);
size += 32;
}
else
{
buf[size] = 0;// delivery instructions flag local
size++;
}
memcpy (buf + size, msg->GetBuffer (), msg->GetLength ());
size += msg->GetLength ();
*(uint32_t *)(buf + size) = htobe32 (m_Rnd.GenerateWord32 ()); // CloveID
size += 4;
*(uint64_t *)(buf + size) = htobe64 (ts); // Expiration of clove
size += 8;
memset (buf + size, 0, 3); // certificate of clove
size += 3;
return size;
}
GarlicRouting routing;
GarlicRouting::GarlicRouting ()
{
@ -138,7 +159,8 @@ namespace garlic
m_Sessions.clear ();
}
I2NPMessage * GarlicRouting::WrapSingleMessage (const i2p::data::RoutingDestination * destination, I2NPMessage * msg)
I2NPMessage * GarlicRouting::WrapSingleMessage (const i2p::data::RoutingDestination * destination,
I2NPMessage * msg, I2NPMessage * leaseSet)
{
if (!destination) return nullptr;
auto it = m_Sessions.find (destination->GetIdentHash ());
@ -151,7 +173,7 @@ namespace garlic
m_Sessions[destination->GetIdentHash ()] = session;
}
I2NPMessage * ret = session->WrapSingleMessage (msg);
I2NPMessage * ret = session->WrapSingleMessage (msg, leaseSet);
if (session->GetNumRemainingSessionTags () <= 0)
{
m_Sessions.erase (destination->GetIdentHash ());