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

#define	U32V(v) ((uint32_t)(v) & UINT32_C(0xFFFFFFFF))

#define	U8TO32_LITTLE(p) SWAP32LE(((uint32_t*)(p))[0])

#define	U32TO8_LITTLE(p, v) (((uint32_t*)(p))[0] = SWAP32LE(v))

#define	ROTATE(v, c) (rol32(v,c))

#define	XOR(v, w) ((v) ^ (w))

#define	PLUS(v, w) (U32V((v) + (w)))

#define	PLUSONE(v) (PLUS((v),1))

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

◆ PLUSONE

#define PLUSONE ( v ) (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 ) (rol32(v,c))

◆ U32TO8_LITTLE

#define U32TO8_LITTLE	(		p,
			v ) (((uint32_t*)(p))[0] = SWAP32LE(v))

◆ U32V

#define U32V ( v ) ((uint32_t)(v) & UINT32_C(0xFFFFFFFF))

◆ U8TO32_LITTLE

#define U8TO32_LITTLE ( p ) SWAP32LE(((uint32_t*)(p))[0])

◆ U8V

#define U8V ( v ) ((uint8_t)(v) & UINT8_C(0xFF))

◆ XOR

#define XOR	(		v,
			w ) ((v) ^ (w))

Function Documentation

◆ chacha()

static 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"