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
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