rijndael.h

/*  $OpenBSD: rijndael.h,v 1.15 2021/09/28 11:14:50 dtucker Exp $ */

#ifndef _PRIVATE_RIJNDAEL_H
#define _PRIVATE_RIJNDAEL_H

#define AES_MAXKEYBITS  (256)
#define AES_MAXKEYBYTES (AES_MAXKEYBITS/8)
/* for 256-bit keys, fewer for less */
#define AES_MAXROUNDS   14

typedef unsigned char   u8;
typedef unsigned short  u16;
typedef unsigned int    u32;

int rijndaelKeySetupEnc(unsigned int [], const unsigned char [], int);
void    rijndaelEncrypt(const unsigned int [], int, const u8 [16], u8 [16]);

/*  The structure for key information */
typedef struct {
    int decrypt;
    int Nr;     /* key-length-dependent number of rounds */
    u32 ek[4*(AES_MAXROUNDS + 1)];  /* encrypt key schedule */
    u32 dk[4*(AES_MAXROUNDS + 1)];  /* decrypt key schedule */
} rijndael_ctx;

void     rijndael_set_key(rijndael_ctx *, u_char *, int, int);
void     rijndael_decrypt(rijndael_ctx *, u_char *, u_char *);
void     rijndael_encrypt(rijndael_ctx *, u_char *, u_char *);

#endif /* _PRIVATE_RIJNDAEL_H */