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