Mirrors/i2pd
2
0
Fork 0
mirror of https://github.com/PurpleI2P/i2pd.git synced 2025-04-28 11:47:48 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Added TunnelConfig.cpp. Removed CryptoWroker.h

Browse source
This commit is contained in:
orignal 2020-10-22 21:06:23 -04:00
parent d65a282e9d
commit 57d6c7a3b3
5 changed files with 123 additions and 181 deletions
Download patch file Download diff file Expand all files Collapse all files

114
libi2pd/TunnelConfig.cpp Normal file
View file

@ -0,0 +1,114 @@
/*
* Copyright (c) 2013-2020, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
* See full license text in LICENSE file at top of project tree
*
*/
#include <memory>
#include <openssl/rand.h>
#include "Transports.h"
#include "Timestamp.h"
#include "I2PEndian.h"
#include "I2NPProtocol.h"
#include "TunnelConfig.h"
namespace i2p
{
namespace tunnel
{
TunnelHopConfig::TunnelHopConfig (std::shared_ptr<const i2p::data::IdentityEx> r)
{
RAND_bytes (layerKey, 32);
RAND_bytes (ivKey, 32);
RAND_bytes (replyKey, 32);
RAND_bytes (replyIV, 16);
RAND_bytes ((uint8_t *)&tunnelID, 4);
if (!tunnelID) tunnelID = 1; // tunnelID can't be zero
isGateway = true;
isEndpoint = true;
ident = r;
//nextRouter = nullptr;
nextTunnelID = 0;
next = nullptr;
prev = nullptr;
}
void TunnelHopConfig::SetNextIdent (const i2p::data::IdentHash& ident)
{
nextIdent = ident;
isEndpoint = false;
RAND_bytes ((uint8_t *)&nextTunnelID, 4);
if (!nextTunnelID) nextTunnelID = 1; // tunnelID can't be zero
}
void TunnelHopConfig::SetReplyHop (uint32_t replyTunnelID, const i2p::data::IdentHash& replyIdent)
{
nextIdent = replyIdent;
nextTunnelID = replyTunnelID;
isEndpoint = true;
}
void TunnelHopConfig::SetNext (TunnelHopConfig * n)
{
next = n;
if (next)
{
next->prev = this;
next->isGateway = false;
isEndpoint = false;
nextIdent = next->ident->GetIdentHash ();
nextTunnelID = next->tunnelID;
}
}
void TunnelHopConfig::SetPrev (TunnelHopConfig * p)
{
prev = p;
if (prev)
{
prev->next = this;
prev->isEndpoint = false;
isGateway = false;
}
}
void TunnelHopConfig::CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx) const
{
uint8_t clearText[BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE];
htobe32buf (clearText + BUILD_REQUEST_RECORD_RECEIVE_TUNNEL_OFFSET, tunnelID);
memcpy (clearText + BUILD_REQUEST_RECORD_OUR_IDENT_OFFSET, ident->GetIdentHash (), 32);
htobe32buf (clearText + BUILD_REQUEST_RECORD_NEXT_TUNNEL_OFFSET, nextTunnelID);
memcpy (clearText + BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET, nextIdent, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_LAYER_KEY_OFFSET, layerKey, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_IV_KEY_OFFSET, ivKey, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_REPLY_KEY_OFFSET, replyKey, 32);
memcpy (clearText + BUILD_REQUEST_RECORD_REPLY_IV_OFFSET, replyIV, 16);
uint8_t flag = 0;
if (isGateway) flag |= 0x80;
if (isEndpoint) flag |= 0x40;
clearText[BUILD_REQUEST_RECORD_FLAG_OFFSET] = flag;
htobe32buf (clearText + BUILD_REQUEST_RECORD_REQUEST_TIME_OFFSET, i2p::util::GetHoursSinceEpoch ());
htobe32buf (clearText + BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET, replyMsgID);
RAND_bytes (clearText + BUILD_REQUEST_RECORD_PADDING_OFFSET, BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE - BUILD_REQUEST_RECORD_PADDING_OFFSET);
auto encryptor = ident->CreateEncryptor (nullptr);
if (encryptor)
{
if (ident->GetCryptoKeyType () == i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD_RATCHET)
EncryptECIES (encryptor, clearText, record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET, ctx);
else
encryptor->Encrypt (clearText, record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET, ctx, false);
}
memcpy (record + BUILD_REQUEST_RECORD_TO_PEER_OFFSET, (const uint8_t *)ident->GetIdentHash (), 16);
}
void TunnelHopConfig::EncryptECIES (std::shared_ptr<i2p::crypto::CryptoKeyEncryptor>& encryptor,
const uint8_t * clearText, uint8_t * encrypted, BN_CTX * ctx) const
{
memset (encrypted, 0, 512); // TODO: implement
}
}
}