cast.c File Reference

#include <openssl/cast.h>
#include "internal.h"
#include "../macros.h"

Macros
#define	ROTL(a, n)   ((((a) << (n)) | ((a) >> ((-(n))&31))) & 0xffffffffL)
#define	E_CAST(n, key, L, R, OP1, OP2, OP3)
#define	CAST_exp(l, A, a, n)
#define	S4   CAST_S_table4
#define	S5   CAST_S_table5
#define	S6   CAST_S_table6
#define	S7   CAST_S_table7

Functions
void	CAST_ecb_encrypt (const uint8_t *in, uint8_t *out, const CAST_KEY *ks, int enc)
void	CAST_encrypt (uint32_t *data, const CAST_KEY *key)
void	CAST_decrypt (uint32_t *data, const CAST_KEY *key)
void	CAST_cbc_encrypt (const uint8_t *in, uint8_t *out, long length, const CAST_KEY *ks, uint8_t *iv, int enc)
void	CAST_set_key (CAST_KEY *key, size_t len, const uint8_t *data)
void	CAST_cfb64_encrypt (const uint8_t *in, uint8_t *out, long length, const CAST_KEY *schedule, uint8_t *ivec, int *num, int enc)

Macro Definition Documentation

CAST_exp

#define CAST_exp	(		l,
			A,
			a,
			n
	)

Value:

A[n / 4] = l;                \
  a[n + 3] = (l)&0xff;         \
  a[n + 2] = (l >> 8) & 0xff;  \
  a[n + 1] = (l >> 16) & 0xff; \
  a[n + 0] = (l >> 24) & 0xff;

E_CAST

#define E_CAST	(		n,
			key,
			L,
			R,
			OP1,
			OP2,
			OP3
	)

Value:

{                                                                           \
    uint32_t a, b, c, d;                                                      \
    t = (key[n * 2] OP1 R) & 0xffffffff;                                      \
    t = ROTL(t, (key[n * 2 + 1]));                                            \
    a = CAST_S_table0[(t >> 8) & 0xff];                                       \
    b = CAST_S_table1[(t)&0xff];                                              \
    c = CAST_S_table2[(t >> 24) & 0xff];                                      \
    d = CAST_S_table3[(t >> 16) & 0xff];                                      \
    L ^= (((((a OP2 b)&0xffffffffL)OP3 c) & 0xffffffffL)OP1 d) & 0xffffffffL; \
  }

ROTL

#define ROTL	(		a,
			n
	)		((((a) << (n)) | ((a) >> ((-(n))&31))) & 0xffffffffL)

S4

#define S4   CAST_S_table4

S5

#define S5   CAST_S_table5

S6

#define S6   CAST_S_table6

S7

#define S7   CAST_S_table7

Function Documentation

CAST_cbc_encrypt()

void CAST_cbc_encrypt	(	const uint8_t *	in,
		uint8_t *	out,
		long	length,
		const CAST_KEY *	ks,
		uint8_t *	iv,
		int	enc
	)

CAST_cfb64_encrypt()

void CAST_cfb64_encrypt	(	const uint8_t *	in,
		uint8_t *	out,
		long	length,
		const CAST_KEY *	schedule,
		uint8_t *	ivec,
		int *	num,
		int	enc
	)

CAST_decrypt()

void CAST_decrypt	(	uint32_t *	data,
		const CAST_KEY *	key
	)

CAST_ecb_encrypt()

void CAST_ecb_encrypt	(	const uint8_t *	in,
		uint8_t *	out,
		const CAST_KEY *	ks,
		int	enc
	)

CAST_encrypt()

void CAST_encrypt	(	uint32_t *	data,
		const CAST_KEY *	key
	)

CAST_set_key()

void CAST_set_key	(	CAST_KEY *	key,
		size_t	len,
		const uint8_t *	data
	)