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create MAC key

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orignal 2014-02-03 14:40:38 -05:00
parent 0171d3040a
commit 6f08edb32f
2 changed files with 9 additions and 5 deletions
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10
SSU.cpp
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@ -20,7 +20,7 @@ namespace ssu
{
}
void SSUSession::CreateAESKey (uint8_t * pubKey, uint8_t * aesKey) // TODO: move it to base class for NTCP and SSU
void SSUSession::CreateAESandMacKey (uint8_t * pubKey, uint8_t * aesKey, uint8_t * macKey)
{
CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);
CryptoPP::SecByteBlock secretKey(dh.AgreedValueLength());
@ -34,9 +34,13 @@ namespace ssu
{
aesKey[0] = 0;
memcpy (aesKey + 1, secretKey, 31);
memcpy (macKey, secretKey + 31, 32);
}
else
else
{
memcpy (aesKey, secretKey, 32);
memcpy (macKey, secretKey + 32, 32);
}
}
void SSUSession::ProcessNextMessage (uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& senderEndpoint)
@ -172,7 +176,7 @@ namespace ssu
SSUHeader * header = (SSUHeader *)buf;
if ((header->flag >> 4) == expectedPayloadType)
{
CreateAESKey (buf + sizeof (SSUHeader), m_SessionKey);
CreateAESandMacKey (buf + sizeof (SSUHeader), m_SessionKey, m_MacKey);
return true;
}
else