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locate record to build inside CreateBuildRequestRecord

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orignal 2021-07-08 19:00:25 -04:00
parent d73b42b726
commit 84f6024cc9
3 changed files with 16 additions and 13 deletions
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8
libi2pd/Tunnel.cpp
View file

@ -55,7 +55,6 @@ namespace tunnel
uint8_t * records = msg->GetPayload () + 1;
TunnelHopConfig * hop = m_Config->GetFirstHop ();
int i = 0;
BN_CTX * ctx = BN_CTX_new ();
while (hop)
{
uint32_t msgID;
@ -63,13 +62,10 @@ namespace tunnel
RAND_bytes ((uint8_t *)&msgID, 4);
else
msgID = replyMsgID;
int idx = recordIndicies[i];
hop->CreateBuildRequestRecord (records + idx*TUNNEL_BUILD_RECORD_SIZE, msgID, ctx);
hop->recordIndex = idx;
i++;
hop->recordIndex = recordIndicies[i]; i++;
hop->CreateBuildRequestRecord (records, msgID);
hop = hop->next;
}
BN_CTX_free (ctx);
// fill up fake records with random data
for (int i = numHops; i < numRecords; i++)
{

13
libi2pd/TunnelConfig.cpp
View file

@ -87,7 +87,7 @@ namespace tunnel
decryption.Decrypt(record, TUNNEL_BUILD_RECORD_SIZE, record);
}
void ElGamalTunnelHopConfig::CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx)
void ElGamalTunnelHopConfig::CreateBuildRequestRecord (uint8_t * records, uint32_t replyMsgID)
{
// fill clear text
uint8_t flag = 0;
@ -107,9 +107,14 @@ namespace tunnel
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);
// encrypt
uint8_t * record = records + recordIndex*TUNNEL_BUILD_RECORD_SIZE;
auto encryptor = ident->CreateEncryptor (nullptr);
if (encryptor)
{
BN_CTX * ctx = BN_CTX_new ();
encryptor->Encrypt (clearText, record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET, ctx, false);
BN_CTX_free (ctx);
}
memcpy (record + BUILD_REQUEST_RECORD_TO_PEER_OFFSET, (const uint8_t *)ident->GetIdentHash (), 16);
}
@ -152,7 +157,7 @@ namespace tunnel
return i2p::crypto::AEADChaCha20Poly1305 (encrypted, len - 16, m_H, 32, key, nonce, clearText, len - 16, false); // decrypt
}
void LongECIESTunnelHopConfig::CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx)
void LongECIESTunnelHopConfig::CreateBuildRequestRecord (uint8_t * records, uint32_t replyMsgID)
{
// fill clear text
uint8_t flag = 0;
@ -173,6 +178,7 @@ namespace tunnel
htobe32buf (clearText + ECIES_BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET, replyMsgID);
memset (clearText + ECIES_BUILD_REQUEST_RECORD_PADDING_OFFSET, 0, ECIES_BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE - ECIES_BUILD_REQUEST_RECORD_PADDING_OFFSET);
// encrypt
uint8_t * record = records + recordIndex*TUNNEL_BUILD_RECORD_SIZE;
EncryptECIES (clearText, ECIES_BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE, record + BUILD_REQUEST_RECORD_ENCRYPTED_OFFSET);
memcpy (record + BUILD_REQUEST_RECORD_TO_PEER_OFFSET, (const uint8_t *)ident->GetIdentHash (), 16);
}
@ -190,7 +196,7 @@ namespace tunnel
return true;
}
void ShortECIESTunnelHopConfig::CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx)
void ShortECIESTunnelHopConfig::CreateBuildRequestRecord (uint8_t * records, uint32_t replyMsgID)
{
// fill clear text
uint8_t flag = 0;
@ -208,6 +214,7 @@ namespace tunnel
htobe32buf (clearText + SHORT_REQUEST_RECORD_SEND_MSG_ID_OFFSET, replyMsgID);
memset (clearText + SHORT_REQUEST_RECORD_PADDING_OFFSET, 0, SHORT_REQUEST_RECORD_CLEAR_TEXT_SIZE - SHORT_REQUEST_RECORD_PADDING_OFFSET);
// encrypt
uint8_t * record = records + recordIndex*SHORT_TUNNEL_BUILD_RECORD_SIZE;
EncryptECIES (clearText, SHORT_REQUEST_RECORD_CLEAR_TEXT_SIZE, record + SHORT_REQUEST_RECORD_ENCRYPTED_OFFSET);
// derive reply and layer key
i2p::crypto::HKDF (m_CK, nullptr, 0, "SMTunnelReplyKey", m_CK);

8
libi2pd/TunnelConfig.h
View file

@ -41,7 +41,7 @@ namespace tunnel
void SetPrev (TunnelHopConfig * p);
virtual uint8_t GetRetCode (const uint8_t * records) const = 0;
virtual void CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx) = 0;
virtual void CreateBuildRequestRecord (uint8_t * records, uint32_t replyMsgID) = 0;
virtual bool DecryptBuildResponseRecord (uint8_t * records) const = 0;
virtual void DecryptRecord (uint8_t * records, int index) const; // AES
};
@ -52,7 +52,7 @@ namespace tunnel
TunnelHopConfig (r) {};
uint8_t GetRetCode (const uint8_t * records) const
{ return (records + recordIndex*TUNNEL_BUILD_RECORD_SIZE)[BUILD_RESPONSE_RECORD_RET_OFFSET]; };
void CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx);
void CreateBuildRequestRecord (uint8_t * records, uint32_t replyMsgID);
bool DecryptBuildResponseRecord (uint8_t * records) const;
};
@ -70,7 +70,7 @@ namespace tunnel
ECIESTunnelHopConfig (r) {};
uint8_t GetRetCode (const uint8_t * records) const
{ return (records + recordIndex*TUNNEL_BUILD_RECORD_SIZE)[ECIES_BUILD_RESPONSE_RECORD_RET_OFFSET]; };
void CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx);
void CreateBuildRequestRecord (uint8_t * records, uint32_t replyMsgID);
bool DecryptBuildResponseRecord (uint8_t * records) const;
};
@ -80,7 +80,7 @@ namespace tunnel
ECIESTunnelHopConfig (r) {};
uint8_t GetRetCode (const uint8_t * records) const
{ return (records + recordIndex*SHORT_TUNNEL_BUILD_RECORD_SIZE)[ECIES_BUILD_RESPONSE_RECORD_RET_OFFSET]; }; // TODO
void CreateBuildRequestRecord (uint8_t * record, uint32_t replyMsgID, BN_CTX * ctx);
void CreateBuildRequestRecord (uint8_t * records, uint32_t replyMsgID);
bool DecryptBuildResponseRecord (uint8_t * records) const;
void DecryptRecord (uint8_t * records, int index) const override; // Chacha20
};