include/crypto/twofish.h

   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