des.h

#ifndef DES_H
#define DES_H
 
#ifdef HAVE_NETTLE
#include <nettle/des.h>
 
typedef struct des_ctx DES_KEY;
#endif
 
#include <freetds/pushvis.h>
 
typedef uint8_t des_cblock[8];
 
#ifndef HAVE_NETTLE
typedef struct des_key
{
    uint8_t  kn[16][8];
    uint32_t sp[8][64];
    uint8_t  iperm[16][16][8];
    uint8_t  fperm[16][16][8];
} DES_KEY;
 
int tds_des_set_key(DES_KEY * dkey, const des_cblock user_key, int len);
void tds_des_encrypt(const DES_KEY * key, des_cblock block);
#endif
 
void tds_des_set_odd_parity(des_cblock key);
int tds_des_ecb_encrypt(const void *plaintext, int len, DES_KEY * akey, uint8_t *output);
 
#include <freetds/popvis.h>
 
#ifdef HAVE_NETTLE
static inline void tds_des_encrypt(const DES_KEY * key, des_cblock block)
{
    nettle_des_encrypt(key, sizeof(des_cblock), block, block);
}
 
static inline int tds_des_set_key(DES_KEY * dkey, const des_cblock user_key, int len)
{
    return nettle_des_set_key(dkey, user_key);
}
#endif
 
#endif /* !DES_H */