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aligned AES and MAC keys

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orignal 2014-11-01 14:56:13 -04:00
parent 7a976dd5f2
commit 4334007688
4 changed files with 26 additions and 18 deletions
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16
SSUSession.cpp
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@ -2,7 +2,6 @@
#include <cryptopp/dh.h>
#include <cryptopp/sha.h>
#include "CryptoConst.h"
#include "hmac.h"
#include "Log.h"
#include "Timestamp.h"
#include "RouterContext.h"
@ -40,16 +39,17 @@ namespace transport
return;
};
uint8_t * sessionKey = m_SessionKey, * macKey = m_MacKey;
if (sharedKey[0] & 0x80)
{
m_SessionKey[0] = 0;
memcpy (m_SessionKey + 1, sharedKey, 31);
memcpy (m_MacKey, sharedKey + 31, 32);
sessionKey[0] = 0;
memcpy (sessionKey + 1, sharedKey, 31);
memcpy (macKey, sharedKey + 31, 32);
}
else if (sharedKey[0])
{
memcpy (m_SessionKey, sharedKey, 32);
memcpy (m_MacKey, sharedKey + 32, 32);
memcpy (sessionKey, sharedKey, 32);
memcpy (macKey, sharedKey + 32, 32);
}
else
{
@ -65,8 +65,8 @@ namespace transport
}
}
memcpy (m_SessionKey, nonZero, 32);
CryptoPP::SHA256().CalculateDigest(m_MacKey, nonZero, 64 - (nonZero - sharedKey));
memcpy (sessionKey, nonZero, 32);
CryptoPP::SHA256().CalculateDigest(macKey, nonZero, 64 - (nonZero - sharedKey));
}
m_IsSessionKey = true;
m_SessionKeyEncryption.SetKey (m_SessionKey);