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tunnel encryption/decryption

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orignal 2014-05-15 11:21:41 -04:00
parent 6557ebb51b
commit 6d1d816153
2 changed files with 51 additions and 0 deletions
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15
aes.cpp
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@ -1,4 +1,5 @@
#include <stdlib.h> #include <stdlib.h>
#include "TunnelBase.h"
#include "aes.h" #include "aes.h"
namespace i2p namespace i2p
@ -287,6 +288,20 @@ namespace crypto
Decrypt (1, (const ChipherBlock *)in, (ChipherBlock *)out); Decrypt (1, (const ChipherBlock *)in, (ChipherBlock *)out);
#endif #endif
} }
void TunnelEncryption::Encrypt (uint8_t * payload)
{
m_IVEncryption.Encrypt ((ChipherBlock *)payload, (ChipherBlock *)payload); // iv
m_LayerEncryption.Encrypt (payload + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, payload + 16); // data
m_IVEncryption.Encrypt ((ChipherBlock *)payload, (ChipherBlock *)payload); // double iv
}
void TunnelDecryption::Decrypt (uint8_t * payload)
{
m_IVDecryption.Decrypt ((ChipherBlock *)payload, (ChipherBlock *)payload); // iv
m_LayerDecryption.Decrypt (payload + 16, i2p::tunnel::TUNNEL_DATA_ENCRYPTED_SIZE, payload + 16); // data
m_IVDecryption.Decrypt ((ChipherBlock *)payload, (ChipherBlock *)payload); // double iv
}
} }
} }

36
aes.h
View file

@ -138,6 +138,42 @@ namespace crypto
ChipherBlock m_IV; ChipherBlock m_IV;
ECBDecryption m_ECBDecryption; ECBDecryption m_ECBDecryption;
}; };
class TunnelEncryption // with double IV encryption
{
public:
void SetKeys (uint8_t * layerKey, uint8_t * ivKey)
{
m_LayerEncryption.SetKey (layerKey);
m_IVEncryption.SetKey (ivKey);
}
void Encrypt (uint8_t * payload); // 1024 bytes (16 IV + 1008 data)
private:
ECBEncryption m_IVEncryption;
CBCEncryption m_LayerEncryption;
};
class TunnelDecryption // with double IV encryption
{
public:
void SetKeys (uint8_t * layerKey, uint8_t * ivKey)
{
m_LayerDecryption.SetKey (layerKey);
m_IVDecryption.SetKey (ivKey);
}
void Decrypt (uint8_t * payload); // 1024 bytes (16 IV + 1008 data)
private:
ECBDecryption m_IVDecryption;
CBCDecryption m_LayerDecryption;
};
} }
} }