include/crypto/aes.h

   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  */
  24 struct 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
  30 extern const u32 crypto_ft_tab[4][256];
  31 extern const u32 crypto_fl_tab[4][256];
  32 extern const u32 crypto_it_tab[4][256];
  33 extern const u32 crypto_il_tab[4][256];
  34
  35 int crypto_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
  36                 unsigned int key_len);
  37 int crypto_aes_expand_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
  38                 unsigned int key_len);
  39 #endif