linux/include/crypto/twofish.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _CRYPTO_TWOFISH_H
#define _CRYPTO_TWOFISH_H

#include <linux/types.h>

#define TF_MIN_KEY_SIZE …
#define TF_MAX_KEY_SIZE …
#define TF_BLOCK_SIZE …

struct crypto_tfm;

/* Structure for an expanded Twofish key.  s contains the key-dependent
 * S-boxes composed with the MDS matrix; w contains the eight "whitening"
 * subkeys, K[0] through K[7].	k holds the remaining, "round" subkeys.  Note
 * that k[i] corresponds to what the Twofish paper calls K[i+8]. */
struct twofish_ctx { … };

int __twofish_setkey(struct twofish_ctx *ctx, const u8 *key,
		     unsigned int key_len);
int twofish_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len);

#endif