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Code Issues Releases Activity

pass flag to SSU header

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orignal 2016-02-25 18:40:40 -05:00
parent 1a4923cdce
commit 9d6d1825c7
2 changed files with 8 additions and 6 deletions
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11
SSUSession.cpp
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@ -324,16 +324,17 @@ namespace transport
{
uint8_t buf[320 + 18]; // 304 bytes for ipv4, 320 for ipv6
uint8_t * payload = buf + sizeof (SSUHeader);
uint8_t flag = 0;
// fill extended options, 3 bytes extended options don't change message size
if (i2p::context.GetStatus () == eRouterStatusOK) // we don't need relays
{
// tell out peer to now assign relay tag
((SSUHeader *)buf)->flag |= SSU_HEADER_EXTENDED_OPTIONS_INCLUDED;
flag = SSU_HEADER_EXTENDED_OPTIONS_INCLUDED;
*payload = 2; payload++; // 1 byte length
uint16_t flags = 0; // clear EXTENDED_OPTIONS_FLAG_REQUEST_RELAY_TAG
htobe16buf (payload, flags);
payload += 2;
}
}
// fill payload
memcpy (payload, m_DHKeysPair->GetPublicKey (), 256); // x
bool isV4 = m_RemoteEndpoint.address ().is_v4 ();
@ -350,7 +351,7 @@ namespace transport
// encrypt and send
uint8_t iv[16];
RAND_bytes (iv, 16); // random iv
FillHeaderAndEncrypt (PAYLOAD_TYPE_SESSION_REQUEST, buf, isV4 ? 304 : 320, m_IntroKey, iv, m_IntroKey);
FillHeaderAndEncrypt (PAYLOAD_TYPE_SESSION_REQUEST, buf, isV4 ? 304 : 320, m_IntroKey, iv, m_IntroKey, flag);
m_Server.Send (buf, isV4 ? 304 : 320, m_RemoteEndpoint);
}
@ -677,7 +678,7 @@ namespace transport
}
void SSUSession::FillHeaderAndEncrypt (uint8_t payloadType, uint8_t * buf, size_t len,
const i2p::crypto::AESKey& aesKey, const uint8_t * iv, const i2p::crypto::MACKey& macKey)
const i2p::crypto::AESKey& aesKey, const uint8_t * iv, const i2p::crypto::MACKey& macKey, uint8_t flag)
{
if (len < sizeof (SSUHeader))
{
@ -686,7 +687,7 @@ namespace transport
}
SSUHeader * header = (SSUHeader *)buf;
memcpy (header->iv, iv, 16);
header->flag = payloadType << 4; // MSB is 0
header->flag = flag | (payloadType << 4); // MSB is 0
htobe32buf (header->time, i2p::util::GetSecondsSinceEpoch ());
uint8_t * encrypted = &header->flag;
uint16_t encryptedLen = len - (encrypted - buf);

3
SSUSession.h
View File

@ -124,7 +124,8 @@ namespace transport
void Send (uint8_t type, const uint8_t * payload, size_t len); // with session key
void Send (const uint8_t * buf, size_t size);
void FillHeaderAndEncrypt (uint8_t payloadType, uint8_t * buf, size_t len, const i2p::crypto::AESKey& aesKey, const uint8_t * iv, const i2p::crypto::MACKey& macKey);
void FillHeaderAndEncrypt (uint8_t payloadType, uint8_t * buf, size_t len, const i2p::crypto::AESKey& aesKey,
const uint8_t * iv, const i2p::crypto::MACKey& macKey, uint8_t flag = 0);
void FillHeaderAndEncrypt (uint8_t payloadType, uint8_t * buf, size_t len); // with session key
void Decrypt (uint8_t * buf, size_t len, const i2p::crypto::AESKey& aesKey);
void DecryptSessionKey (uint8_t * buf, size_t len);