Root/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 */
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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