linux/include/crypto/aes.h
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   1/*
   2 * Common values for AES algorithms
   3 */
   4
   5#ifndef _CRYPTO_AES_H
   6#define _CRYPTO_AES_H
   7
   8#include <linux/types.h>
   9#include <linux/crypto.h>
  10
  11#define AES_MIN_KEY_SIZE        16
  12#define AES_MAX_KEY_SIZE        32
  13#define AES_KEYSIZE_128         16
  14#define AES_KEYSIZE_192         24
  15#define AES_KEYSIZE_256         32
  16#define AES_BLOCK_SIZE          16
  17#define AES_MAX_KEYLENGTH       (15 * 16)
  18#define AES_MAX_KEYLENGTH_U32   (AES_MAX_KEYLENGTH / sizeof(u32))
  19
  20/*
  21 * Please ensure that the first two fields are 16-byte aligned
  22 * relative to the start of the structure, i.e., don't move them!
  23 */
  24struct crypto_aes_ctx {
  25        u32 key_enc[AES_MAX_KEYLENGTH_U32];
  26        u32 key_dec[AES_MAX_KEYLENGTH_U32];
  27        u32 key_length;
  28};
  29
  30extern const u32 crypto_ft_tab[4][256];
  31extern const u32 crypto_fl_tab[4][256];
  32extern const u32 crypto_it_tab[4][256];
  33extern const u32 crypto_il_tab[4][256];
  34
  35int crypto_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
  36                unsigned int key_len);
  37int crypto_aes_expand_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
  38                unsigned int key_len);
  39#endif
  40
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