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, u32 *flags); 23 int twofish_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len); 24 25 #endif 26