linux/include/crypto/twofish.h
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   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
  10struct 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]. */
  16struct twofish_ctx {
  17        u32 s[4][256], w[8], k[32];
  18};
  19
  20int __twofish_setkey(struct twofish_ctx *ctx, const u8 *key,
  21                     unsigned int key_len, u32 *flags);
  22int twofish_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len);
  23
  24#endif
  25
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