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Unroll Salsa20 fully for a little more speed (non-SSE now almost as fast as SSE)

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This commit is contained in:
Adam Ierymenko 2015-10-09 09:39:27 -07:00
parent 3fa6dd377f
commit 0c498556d5
7 changed files with 1131 additions and 178 deletions
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40
node/Salsa20.hpp
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@ -35,12 +35,11 @@ public:
* @param key Key bits
* @param kbits Number of key bits: 128 or 256 (recommended)
* @param iv 64-bit initialization vector
* @param rounds Number of rounds: 8, 12, or 20
*/
Salsa20(const void *key,unsigned int kbits,const void *iv,unsigned int rounds)
Salsa20(const void *key,unsigned int kbits,const void *iv)
throw()
{
init(key,kbits,iv,rounds);
init(key,kbits,iv);
}
/**
@ -49,19 +48,28 @@ public:
* @param key Key bits
* @param kbits Number of key bits: 128 or 256 (recommended)
* @param iv 64-bit initialization vector
* @param rounds Number of rounds: 8, 12, or 20
*/
void init(const void *key,unsigned int kbits,const void *iv,unsigned int rounds)
void init(const void *key,unsigned int kbits,const void *iv)
throw();
/**
* Encrypt data
* Encrypt data using Salsa20/12
*
* @param in Input data
* @param out Output buffer
* @param bytes Length of data
*/
void encrypt(const void *in,void *out,unsigned int bytes)
void encrypt12(const void *in,void *out,unsigned int bytes)
throw();
/**
* Encrypt data using Salsa20/20
*
* @param in Input data
* @param out Output buffer
* @param bytes Length of data
*/
void encrypt20(const void *in,void *out,unsigned int bytes)
throw();
/**
@ -71,10 +79,23 @@ public:
* @param out Output buffer
* @param bytes Length of data
*/
inline void decrypt(const void *in,void *out,unsigned int bytes)
inline void decrypt12(const void *in,void *out,unsigned int bytes)
throw()
{
encrypt(in,out,bytes);
encrypt12(in,out,bytes);
}
/**
* Decrypt data
*
* @param in Input data
* @param out Output buffer
* @param bytes Length of data
*/
inline void decrypt20(const void *in,void *out,unsigned int bytes)
throw()
{
encrypt20(in,out,bytes);
}
private:
@ -84,7 +105,6 @@ private:
#endif // ZT_SALSA20_SSE
uint32_t i[16];
} _state;
unsigned int _roundsDiv4;
};
} // namespace ZeroTier