/*
 * Cryptographic API.
 *
 * Copyright (c) 2004 Michal Ludvig <mludvig@xxxxxxx>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option) 
 * any later version.
 *
 */

#ifndef _CRYPTO_PADLOCK_H
#define _CRYPTO_PADLOCK_H

#define AES_MIN_KEY_SIZE	16	/* in u8 units */
#define AES_MAX_KEY_SIZE	32	/* ditto */
#define AES_BLOCK_SIZE		16	/* ditto */
#define AES_EXTENDED_KEY_SIZE	64	/* in u32 units */
#define AES_EXTENDED_KEY_SIZE_B	(AES_EXTENDED_KEY_SIZE * sizeof(u32))

struct aes_ctx {
	u32 e_data[AES_EXTENDED_KEY_SIZE+4];
	u32 d_data[AES_EXTENDED_KEY_SIZE+4];
	int key_length;
	u32 *E;
	u32 *D;
};

#define E_KEY ctx->E
#define D_KEY ctx->D


/* Control word. */
#if 1
union cword {
	u32 cword[4];
	struct {
		int rounds:4;
		int algo:3;
		int keygen:1;
		int interm:1;
		int encdec:1;
		int ksize:2;
	} b;
};
#else
union cword {
	u32 cword[4];
	struct {
		unsigned	rounds:4,
				algo:3,
				keygen:1,
				interm:1,
				encdec:1,
				ksize:2;
	} b;
};
#endif

#define PFX	"padlock: "

void padlock_aligner(u8 *out_arg, const u8 *in_arg, const u8 *iv_arg,
		     void *key, union cword *cword,
		     size_t nbytes, size_t blocksize,
		     int encdec, int mode);

int padlock_init_aes(void);
void padlock_fini_aes(void);

#endif	/* _CRYPTO_PADLOCK_H */