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invert expanded key schedule for decryption

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orignal 2014-05-08 15:11:38 -04:00
parent 0408371a84
commit 4ef971f63c
2 changed files with 54 additions and 12 deletions
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24
aes.h
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@ -18,16 +18,30 @@ namespace crypto
#ifdef __x86_64__
// AES-NI assumed
class ECBCryptoAESNI
{
protected:
void ExpandKey (const uint8_t * key);
protected:
uint32_t m_KeySchedule[4*(14+1)]; // 14 rounds for AES-256
};
class ECBEncryptionAESNI: public ECBCryptoAESNI
{
public:
void SetKey (const uint8_t * key) { ExpandKey (key); };
void Encrypt (const ChipherBlock * in, ChipherBlock * out);
};
class ECBDecryptionAESNI: public ECBCryptoAESNI
{
public:
void SetKey (const uint8_t * key);
void Encrypt (const ChipherBlock * in, ChipherBlock * out);
void Decrypt (const ChipherBlock * in, ChipherBlock * out);
private:
uint32_t m_KeySchedule[4*(14+1)]; // 14 rounds for AES-256
};
#endif