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