chacha.c File Reference

#include <openssl/chacha.h>
#include <assert.h>
#include <string.h>
#include <openssl/cpu.h>
#include "../internal.h"
#include "internal.h"

Include dependency graph for chacha.c:

Go to the source code of this file.

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

Functions
static void	chacha_core (uint8_t output[64], const uint32_t input[16])
void	CRYPTO_chacha_20 (uint8_t *out, const uint8_t *in, size_t in_len, const uint8_t key[32], const uint8_t nonce[12], uint32_t counter)
void	CRYPTO_hchacha20 (uint8_t out[32], const uint8_t key[32], const uint8_t nonce[16])

Variables
static const uint8_t	sigma [16]

Macro Definition Documentation

QUARTERROUND

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

Value:

  x[a] += x[b];                            \
  x[d] = CRYPTO_rotl_u32(x[d] ^ x[a], 16); \
  x[c] += x[d];                            \
  x[b] = CRYPTO_rotl_u32(x[b] ^ x[c], 12); \
  x[a] += x[b];                            \
  x[d] = CRYPTO_rotl_u32(x[d] ^ x[a], 8);  \
  x[c] += x[d];                            \
  x[b] = CRYPTO_rotl_u32(x[b] ^ x[c], 7);

Definition at line 33 of file chacha.c.

Function Documentation

chacha_core()

static void chacha_core ( uint8_t  output[64], const uint32_t  input[16]  )

static

Definition at line 103 of file chacha.c.

CRYPTO_chacha_20()

void CRYPTO_chacha_20	(	uint8_t *	out,
		const uint8_t *	in,
		size_t	in_len,
		const uint8_t	key[32],
		const uint8_t	nonce[12],
		uint32_t	counter
	)

Definition at line 127 of file chacha.c.

CRYPTO_hchacha20()

void CRYPTO_hchacha20	(	uint8_t	out[32],
		const uint8_t	key[32],
		const uint8_t	nonce[16]
	)

Definition at line 43 of file chacha.c.

Variable Documentation

sigma

const uint8_t sigma[16]

static

Initial value:

= { 'e', 'x', 'p', 'a', 'n', 'd', ' ', '3',
                                   '2', '-', 'b', 'y', 't', 'e', ' ', 'k' }

Definition at line 29 of file chacha.c.