LXR linux/include/crypto/aes.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Common values for AES algorithms
   4 */
   5
   6#ifndef _CRYPTO_AES_H
   7#define _CRYPTO_AES_H
   8
   9#include <linux/types.h>
  10#include <linux/crypto.h>
  11
  12#define AES_MIN_KEY_SIZE        16
  13#define AES_MAX_KEY_SIZE        32
  14#define AES_KEYSIZE_128         16
  15#define AES_KEYSIZE_192         24
  16#define AES_KEYSIZE_256         32
  17#define AES_BLOCK_SIZE          16
  18#define AES_MAX_KEYLENGTH       (15 * 16)
  19#define AES_MAX_KEYLENGTH_U32   (AES_MAX_KEYLENGTH / sizeof(u32))
  20
  21/*
  22 * Please ensure that the first two fields are 16-byte aligned
  23 * relative to the start of the structure, i.e., don't move them!
  24 */
  25struct crypto_aes_ctx {
  26        u32 key_enc[AES_MAX_KEYLENGTH_U32];
  27        u32 key_dec[AES_MAX_KEYLENGTH_U32];
  28        u32 key_length;
  29};
  30
  31extern const u32 crypto_ft_tab[4][256] ____cacheline_aligned;
  32extern const u32 crypto_fl_tab[4][256] ____cacheline_aligned;
  33extern const u32 crypto_it_tab[4][256] ____cacheline_aligned;
  34extern const u32 crypto_il_tab[4][256] ____cacheline_aligned;
  35
  36int crypto_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
  37                unsigned int key_len);
  38int crypto_aes_expand_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
  39                unsigned int key_len);
  40#endif
  41