chacha20.cpp File Reference

#include <crypto/common.h>
#include <crypto/chacha20.h>
#include <string.h>

Include dependency graph for chacha20.cpp:

Go to the source code of this file.

Macros
#define	QUARTERROUND(a, b, c, d)

Functions
static constexpr uint32_t	rotl32 (uint32_t v, int c)

Variables
static const unsigned char	sigma [] = "expand 32-byte k"
static const unsigned char	tau [] = "expand 16-byte k"

Macro Definition Documentation

QUARTERROUND

#define QUARTERROUND	(		a,
			b,
			c,
			d
	)

Value:

a += b; d = rotl32(d ^ a, 16); \
  c += d; b = rotl32(b ^ c, 12); \
  a += b; d = rotl32(d ^ a, 8); \
  c += d; b = rotl32(b ^ c, 7);

Definition at line 15 of file chacha20.cpp.

Referenced by ChaCha20::Crypt(), and ChaCha20::Keystream().

Function Documentation

rotl32()

static constexpr uint32_t rotl32 ( uint32_t  v, int  c  )

inlinestatic

Definition at line 13 of file chacha20.cpp.

Variable Documentation

sigma

const unsigned char sigma[] = "expand 32-byte k"

static

Definition at line 21 of file chacha20.cpp.

Referenced by ChaCha20::SetKey().

tau

const unsigned char tau[] = "expand 16-byte k"

static

Definition at line 22 of file chacha20.cpp.

Referenced by ChaCha20::SetKey().