1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _CRYPTO_TWOFISH_H
3#define _CRYPTO_TWOFISH_H
4
5#include <linux/types.h>
6
7#define TF_MIN_KEY_SIZE 16
8#define TF_MAX_KEY_SIZE 32
9#define TF_BLOCK_SIZE 16
10
11struct crypto_tfm;
12
13/* Structure for an expanded Twofish key. s contains the key-dependent
14 * S-boxes composed with the MDS matrix; w contains the eight "whitening"
15 * subkeys, K[0] through K[7]. k holds the remaining, "round" subkeys. Note
16 * that k[i] corresponds to what the Twofish paper calls K[i+8]. */
17struct twofish_ctx {
18 u32 s[4][256], w[8], k[32];
19};
20
21int __twofish_setkey(struct twofish_ctx *ctx, const u8 *key,
22 unsigned int key_len, u32 *flags);
23int twofish_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len);
24
25#endif
26