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check timestamp for token request

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orignal 2022-08-25 18:48:26 -04:00
parent 150c89e48a
commit f98780b1d7
2 changed files with 12 additions and 5 deletions
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14
libi2pd/SSU2Session.cpp
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@ -1029,6 +1029,7 @@ namespace transport
return;
}
// payload
m_State = eSSU2SessionStateTokenRequestReceived;
HandlePayload (payload, len - 48);
SendRetry ();
}
@ -1037,7 +1038,7 @@ namespace transport
{
// we are Bob
Header header;
uint8_t h[32], payload[64];
uint8_t h[32], payload[72];
// fill packet
header.h.connID = m_DestConnID; // dest id
RAND_bytes (header.buf + 8, 4); // random packet num
@ -1047,15 +1048,19 @@ namespace transport
header.h.flags[2] = 0; // flag
memcpy (h, header.buf, 16);
memcpy (h + 16, &m_SourceConnID, 8); // source id
uint64_t token = m_Server.GetIncomingToken (m_RemoteEndpoint);
uint64_t token = 0;
if (m_TerminationReason == eSSU2TerminationReasonNormalClose)
token = m_Server.GetIncomingToken (m_RemoteEndpoint);
memcpy (h + 24, &token, 8); // token
// payload
payload[0] = eSSU2BlkDateTime;
htobe16buf (payload + 1, 4);
htobe32buf (payload + 3, i2p::util::GetSecondsSinceEpoch ());
size_t payloadSize = 7;
payloadSize += CreateAddressBlock (payload + payloadSize, 64 - payloadSize, m_RemoteEndpoint);
payloadSize += CreatePaddingBlock (payload + payloadSize, 64 - payloadSize);
payloadSize += CreateAddressBlock (payload + payloadSize, 56 - payloadSize, m_RemoteEndpoint);
if (m_TerminationReason != eSSU2TerminationReasonNormalClose)
payloadSize += CreateTerminationBlock (payload + payloadSize, 56 - payloadSize);
payloadSize += CreatePaddingBlock (payload + payloadSize, 56 - payloadSize);
// encrypt
uint8_t nonce[12];
CreateNonce (be32toh (header.h.packetNum), nonce);
@ -1449,6 +1454,7 @@ namespace transport
switch (m_State)
{
case eSSU2SessionStateSessionRequestReceived:
case eSSU2SessionStateTokenRequestReceived:
if (std::abs (offset) > SSU2_CLOCK_SKEW)
m_TerminationReason = eSSU2TerminationReasonClockSkew;
break;

3
libi2pd/SSU2Session.h
View File

@ -101,7 +101,8 @@ namespace transport
eSSU2SessionStateFailed,
eSSU2SessionStateIntroduced,
eSSU2SessionStatePeerTest,
eSSU2SessionStatePeerTestReceived // 5 before 4
eSSU2SessionStatePeerTestReceived, // 5 before 4
eSSU2SessionStateTokenRequestReceived
};
enum SSU2PeerTestCode