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handle tunnel delivery instructioin for ECIESx25519

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orignal 2020-01-16 12:47:08 -05:00
parent 376bf6ba72
commit bcfe44db54
7 changed files with 72 additions and 47 deletions
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4
libi2pd/Destination.cpp
View file

@ -359,11 +359,11 @@ namespace client
void LeaseSetDestination::HandleI2NPMessage (const uint8_t * buf, size_t len)
{
uint8_t typeID = buf[I2NP_HEADER_TYPEID_OFFSET];
I2NPMessageType typeID = (I2NPMessageType)(buf[I2NP_HEADER_TYPEID_OFFSET]);
LeaseSetDestination::HandleCloveI2NPMessage (typeID, buf + I2NP_HEADER_SIZE, GetI2NPMessageLength(buf, len) - I2NP_HEADER_SIZE);
}
bool LeaseSetDestination::HandleCloveI2NPMessage (uint8_t typeID, const uint8_t * payload, size_t len)
bool LeaseSetDestination::HandleCloveI2NPMessage (I2NPMessageType typeID, const uint8_t * payload, size_t len)
{
switch (typeID)
{

2
libi2pd/Destination.h
View file

@ -132,7 +132,7 @@ namespace client
// implements GarlicDestination
void HandleI2NPMessage (const uint8_t * buf, size_t len);
bool HandleCloveI2NPMessage (uint8_t typeID, const uint8_t * payload, size_t len);
bool HandleCloveI2NPMessage (I2NPMessageType typeID, const uint8_t * payload, size_t len);
void SetLeaseSet (std::shared_ptr<const i2p::data::LocalLeaseSet> newLeaseSet);
int GetLeaseSetType () const { return m_LeaseSetType; };

38
libi2pd/ECIESX25519AEADRatchetSession.cpp
View file

@ -5,7 +5,6 @@
#include "Elligator.h"
#include "Tag.h"
#include "I2PEndian.h"
#include "Garlic.h"
#include "ECIESX25519AEADRatchetSession.h"
namespace i2p
@ -36,7 +35,7 @@ namespace garlic
}
bool ECIESX25519AEADRatchetSession::NewIncomingSession (const i2p::data::LocalDestination& dest,
const uint8_t * buf, size_t len, CloveI2NPMsgHandler handleCloveI2NPMsg)
const uint8_t * buf, size_t len, CloveHandler handleClove)
{
// we are Bob
// KDF1
@ -87,12 +86,12 @@ namespace garlic
}
if (isStatic) MixHash (buf, len); // h = SHA256(h || ciphertext)
HandlePayload (payload.data (), len - 16, handleCloveI2NPMsg);
HandlePayload (payload.data (), len - 16, handleClove);
return true;
}
void ECIESX25519AEADRatchetSession::HandlePayload (const uint8_t * buf, size_t len, CloveI2NPMsgHandler& handleCloveI2NPMsg)
void ECIESX25519AEADRatchetSession::HandlePayload (const uint8_t * buf, size_t len, CloveHandler& handleClove)
{
size_t offset = 0;
while (offset < len)
@ -110,7 +109,7 @@ namespace garlic
switch (blk)
{
case eECIESx25519BlkGalicClove:
HandleClove (buf + offset, size, handleCloveI2NPMsg);
handleClove (buf + offset, size);
break;
case eECIESx25519BlkDateTime:
LogPrint (eLogDebug, "Garlic: datetime");
@ -119,7 +118,7 @@ namespace garlic
LogPrint (eLogDebug, "Garlic: options");
break;
case eECIESx25519BlkPadding:
LogPrint (eLogDebug, "NTCP2: padding");
LogPrint (eLogDebug, "Garlic: padding");
break;
default:
LogPrint (eLogWarning, "Garlic: Unknown block type ", (int)blk);
@ -127,33 +126,6 @@ namespace garlic
offset += size;
}
}
void ECIESX25519AEADRatchetSession::HandleClove (const uint8_t * buf, size_t len, CloveI2NPMsgHandler& handleCloveI2NPMsg)
{
const uint8_t * buf1 = buf;
uint8_t flag = buf[0]; buf++; // flag
GarlicDeliveryType deliveryType = (GarlicDeliveryType)((flag >> 5) & 0x03);
switch (deliveryType)
{
case eGarlicDeliveryTypeDestination:
buf += 32; // TODO: check destination
// no break here
case eGarlicDeliveryTypeLocal:
{
uint8_t typeID = buf[0]; buf++; // typeid
buf += (4 + 4); // msgID + expiration
ptrdiff_t offset = buf - buf1;
if (offset <= (int)len)
handleCloveI2NPMsg (typeID, buf, len - offset);
else
LogPrint (eLogError, "Garlic: clove is too long");
break;
}
// TODO: tunnel
default:
LogPrint (eLogWarning, "Garlic: unexpected delivery type ", (int)deliveryType);
}
}
}
}

7
libi2pd/ECIESX25519AEADRatchetSession.h
View file

@ -24,20 +24,19 @@ namespace garlic
{
public:
typedef std::function<void (uint8_t typeID, const uint8_t * payload, size_t len)> CloveI2NPMsgHandler;
typedef std::function<void (const uint8_t * buf, size_t len)> CloveHandler;
ECIESX25519AEADRatchetSession ();
~ECIESX25519AEADRatchetSession ();
bool NewIncomingSession (const i2p::data::LocalDestination& dest, const uint8_t * buf, size_t len,
CloveI2NPMsgHandler handleCloveI2NPMsg);
CloveHandler handleClove);
private:
void MixHash (const uint8_t * buf, size_t len);
void HandlePayload (const uint8_t * buf, size_t len, CloveI2NPMsgHandler& handleCloveI2NPMsg);
void HandleClove (const uint8_t * buf, size_t len, CloveI2NPMsgHandler& handleCloveI2NPMsg);
void HandlePayload (const uint8_t * buf, size_t len, CloveHandler& handleClove);
private:

63
libi2pd/Garlic.cpp
View file

@ -833,11 +833,64 @@ namespace garlic
void GarlicDestination::HandleECIESx25519 (const uint8_t * buf, size_t len)
{
ECIESX25519AEADRatchetSession session;
session.NewIncomingSession (*this, buf, len,
[this](uint8_t typeID, const uint8_t * payload, size_t len)
{
HandleCloveI2NPMessage (typeID, payload,len);
});
session.NewIncomingSession (*this, buf, len, std::bind (&GarlicDestination::HandleECIESx25519GarlicClove,
this, std::placeholders::_1, std::placeholders::_2));
}
void GarlicDestination::HandleECIESx25519GarlicClove (const uint8_t * buf, size_t len)
{
const uint8_t * buf1 = buf;
uint8_t flag = buf[0]; buf++; // flag
GarlicDeliveryType deliveryType = (GarlicDeliveryType)((flag >> 5) & 0x03);
switch (deliveryType)
{
case eGarlicDeliveryTypeDestination:
LogPrint (eLogDebug, "Garlic: type destination");
buf += 32; // TODO: check destination
// no break here
case eGarlicDeliveryTypeLocal:
{
LogPrint (eLogDebug, "Garlic: type local");
I2NPMessageType typeID = (I2NPMessageType)(buf[0]); buf++; // typeid
buf += (4 + 4); // msgID + expiration
ptrdiff_t offset = buf - buf1;
if (offset <= (int)len)
HandleCloveI2NPMessage (typeID, buf, len - offset);
else
LogPrint (eLogError, "Garlic: clove is too long");
break;
}
case eGarlicDeliveryTypeTunnel:
{
LogPrint (eLogDebug, "Garlic: type tunnel");
// gwHash and gwTunnel sequence is reverted
const uint8_t * gwHash = buf;
buf += 32;
ptrdiff_t offset = buf - buf1;
if (offset + 13 > (int)len)
{
LogPrint (eLogError, "Garlic: message is too short");
break;
}
uint32_t gwTunnel = bufbe32toh (buf); buf += 4;
I2NPMessageType typeID = (I2NPMessageType)(buf[0]); buf++; // typeid
buf += (4 + 4); // msgID + expiration
offset += 13;
if (GetTunnelPool ())
{
auto tunnel = GetTunnelPool ()->GetNextOutboundTunnel ();
if (tunnel)
tunnel->SendTunnelDataMsg (gwHash, gwTunnel, CreateI2NPMessage (typeID, buf, len - offset));
else
LogPrint (eLogWarning, "Garlic: No outbound tunnels available for garlic clove");
}
else
LogPrint (eLogError, "Garlic: Tunnel pool is not set for inbound tunnel");
break;
}
default:
LogPrint (eLogWarning, "Garlic: unexpected delivery type ", (int)deliveryType);
}
}
}
}

3
libi2pd/Garlic.h
View file

@ -194,7 +194,7 @@ namespace garlic
protected:
virtual void HandleI2NPMessage (const uint8_t * buf, size_t len) = 0; // called from clove only
virtual bool HandleCloveI2NPMessage (uint8_t typeID, const uint8_t * payload, size_t len) = 0;
virtual bool HandleCloveI2NPMessage (I2NPMessageType typeID, const uint8_t * payload, size_t len) = 0;
void HandleGarlicMessage (std::shared_ptr<I2NPMessage> msg);
void HandleDeliveryStatusMessage (uint32_t msgID);
@ -209,6 +209,7 @@ namespace garlic
// ECIES-X25519-AEAD-Ratchet
void HandleECIESx25519 (const uint8_t * buf, size_t len);
void HandleECIESx25519GarlicClove (const uint8_t * buf, size_t len);
private:

2
libi2pd/RouterContext.h
View file

@ -124,7 +124,7 @@ namespace i2p
// implements GarlicDestination
void HandleI2NPMessage (const uint8_t * buf, size_t len);
bool HandleCloveI2NPMessage (uint8_t typeID, const uint8_t * payload, size_t len) { return false; }; // not implemented
bool HandleCloveI2NPMessage (I2NPMessageType typeID, const uint8_t * payload, size_t len) { return false; }; // not implemented
private: