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 
11 struct 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]. */
17 struct twofish_ctx {
18 	u32 s[4][256], w[8], k[32];
19 };
20 
21 int __twofish_setkey(struct twofish_ctx *ctx, const u8 *key,
22 		     unsigned int key_len);
23 int twofish_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len);
24 
25 #endif
26