chacha.c File Reference

#include <memory.h>
#include <stdio.h>
#include <sys/param.h>
#include "chacha.h"
#include "int-util.h"
#include "warnings.h"

Include dependency graph for chacha.c:

Macros
#define	U8V(v)
#define	U32V(v)
#define	U8TO32_LITTLE(p)
#define	U32TO8_LITTLE(p, v)
#define	ROTATE(v, c)
#define	XOR(v, w)
#define	PLUS(v, w)
#define	PLUSONE(v)
#define	QUARTERROUND(a, b, c, d)

Functions
static void	chacha (unsigned rounds, const void *data, size_t length, const uint8_t *key, const uint8_t *iv, char *cipher)
void	chacha8 (const void *data, size_t length, const uint8_t *key, const uint8_t *iv, char *cipher)
void	chacha20 (const void *data, size_t length, const uint8_t *key, const uint8_t *iv, char *cipher)

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

Macro Definition Documentation

PLUS

#define PLUS	(		v,
			w )

Value:

(U32V((v) + (w)))

PLUSONE

#define PLUSONE

(

v

)

Value:

(PLUS((v),1))

QUARTERROUND

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

Value:

a = PLUS(a,b); d = ROTATE(XOR(d,a),16); \
c = PLUS(c,d); b = ROTATE(XOR(b,c),12); \
a = PLUS(a,b); d = ROTATE(XOR(d,a), 8); \
c = PLUS(c,d); b = ROTATE(XOR(b,c), 7);

ROTATE

#define ROTATE	(		v,
			c )

Value:

(rol32(v,c))

U32TO8_LITTLE

#define U32TO8_LITTLE	(		p,
			v )

Value:

(((uint32_t*)(p))[0] = SWAP32LE(v))

U32V

#define U32V

(

v

)

Value:

((uint32_t)(v) & UINT32_C(0xFFFFFFFF))

U8TO32_LITTLE

#define U8TO32_LITTLE

(

p

)

Value:

SWAP32LE(((uint32_t*)(p))[0])

U8V

#define U8V

(

v

)

Value:

((uint8_t)(v) & UINT8_C(0xFF))

XOR

#define XOR	(		v,
			w )

Value:

((v) ^ (w))

Function Documentation

chacha()

void chacha ( unsigned rounds, const void * data, size_t length, const uint8_t * key, const uint8_t * iv, char * cipher )

static

chacha20()

void chacha20	(	const void *	data,
		size_t	length,
		const uint8_t *	key,
		const uint8_t *	iv,
		char *	cipher )

chacha8()

void chacha8	(	const void *	data,
		size_t	length,
		const uint8_t *	key,
		const uint8_t *	iv,
		char *	cipher )

Variable Documentation

sigma

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

static