des-internal.c File Reference

DES and 3DES-EDE ciphers. More...

#include "includes.h"
#include "common.h"
#include "crypto.h"
#include "des_i.h"

Macros
#define	ROLc(x, y)
#define	RORc(x, y)

Functions
void	des_encrypt (const u8 *clear, const u8 *key, u8 *cypher)
	Encrypt one block with DES. More...
void	des_key_setup (const u8 *key, u32 *ek, u32 *dk)
void	des_block_encrypt (const u8 *plain, const u32 *ek, u8 *crypt)
void	des_block_decrypt (const u8 *crypt, const u32 *dk, u8 *plain)
void	des3_key_setup (const u8 *key, struct des3_key_s *dkey)
void	des3_encrypt (const u8 *plain, const struct des3_key_s *key, u8 *crypt)
void	des3_decrypt (const u8 *crypt, const struct des3_key_s *key, u8 *plain)

Detailed Description

DES and 3DES-EDE ciphers.

Modifications to LibTomCrypt implementation:

Macro Definition Documentation

#define ROLc	(		x,
			y
	)

Value:

((((unsigned long) (x) << (unsigned long) ((y) & 31)) | \
          (((unsigned long) (x) & 0xFFFFFFFFUL) >> \
           (unsigned long) (32 - ((y) & 31)))) & 0xFFFFFFFFUL)

DES code submitted by Dobes Vandermeer

#define RORc	(		x,
			y
	)

Value:

(((((unsigned long) (x) & 0xFFFFFFFFUL) >> \
           (unsigned long) ((y) & 31)) | \
          ((unsigned long) (x) << (unsigned long) (32 - ((y) & 31)))) & \
         0xFFFFFFFFUL)

Function Documentation

void des_encrypt	(	const u8 *	clear,
		const u8 *	key,
		u8 *	cypher
	)

Encrypt one block with DES.

Parameters

clear	8 octets (in)
key	7 octets (in) (no parity bits included)
cypher	8 octets (out)