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encrypt Data header

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orignal 2022-03-27 07:47:25 -04:00
parent 7e7aee27b6
commit 371a339b18
1 changed files with 9 additions and 0 deletions
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9
libi2pd/SSU2.cpp
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@ -381,6 +381,8 @@ namespace transport
KDFDataPhase (m_KeyDataReceive, m_KeyDataSend);
Established ();
SendQuickAck ();
return true;
}
@ -523,6 +525,11 @@ namespace transport
void SSU2Session::SendData (const uint8_t * buf, size_t len)
{
if (len < 8)
{
LogPrint (eLogWarning, "SSU2: Data message payload is too short ", (int)len);
return;
}
Header header;
header.h.connID = m_DestConnID;
header.h.packetNum = htobe32 (m_SendPacketNum);
@ -532,6 +539,8 @@ namespace transport
uint8_t nonce[12];
CreateNonce (m_SendPacketNum, nonce);
i2p::crypto::AEADChaCha20Poly1305 (buf, len, header.buf, 16, m_KeyDataSend, nonce, payload, SSU2_MTU, true);
header.ll[0] ^= CreateHeaderMask (m_Address->i, payload + (len - 8));
header.ll[1] ^= CreateHeaderMask (m_KeyDataSend + 32, payload + (len + 4));
m_Server.Send (header.buf, 16, payload, len + 16, m_RemoteEndpoint);
m_SendPacketNum++;
m_LastActivityTimestamp = i2p::util::GetSecondsSinceEpoch ();