/* SPDX-License-Identifier: GPL-2.0 *//* * Common values for AES algorithms */ #ifndef _CRYPTO_AES_H#define _CRYPTO_AES_H #include <linux/types.h>#include <linux/crypto.h> #define AES_MIN_KEY_SIZE	16#define AES_MAX_KEY_SIZE	32#define AES_KEYSIZE_128		16#define AES_KEYSIZE_192		24#define AES_KEYSIZE_256		32#define AES_BLOCK_SIZE		16#define AES_MAX_KEYLENGTH	(15 * 16)#define AES_MAX_KEYLENGTH_U32	(AES_MAX_KEYLENGTH / sizeof(u32)) /* * Please ensure that the first two fields are 16-byte aligned * relative to the start of the structure, i.e., don't move them! */struct crypto_aes_ctx {	u32 key_enc[AES_MAX_KEYLENGTH_U32];	u32 key_dec[AES_MAX_KEYLENGTH_U32];	u32 key_length;}; extern const u32 crypto_ft_tab[4][256] ____cacheline_aligned;extern const u32 crypto_it_tab[4][256] ____cacheline_aligned; /* * validate key length for AES algorithms */static inline int aes_check_keylen(unsigned int keylen){	switch (keylen) {	case AES_KEYSIZE_128:	case AES_KEYSIZE_192:	case AES_KEYSIZE_256:		break;	default:		return -EINVAL;	} 	return 0;} int crypto_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,		unsigned int key_len); /** * aes_expandkey - Expands the AES key as described in FIPS-197 * @ctx:	The location where the computed key will be stored. * @in_key:	The supplied key. * @key_len:	The length of the supplied key. * * Returns 0 on success. The function fails only if an invalid key size (or * pointer) is supplied. * The expanded key size is 240 bytes (max of 14 rounds with a unique 16 bytes * key schedule plus a 16 bytes key which is used before the first round). * The decryption key is prepared for the "Equivalent Inverse Cipher" as * described in FIPS-197. The first slot (16 bytes) of each key (enc or dec) is * for the initial combination, the second slot for the first round and so on. */int aes_expandkey(struct crypto_aes_ctx *ctx, const u8 *in_key,		  unsigned int key_len); /** * aes_encrypt - Encrypt a single AES block * @ctx:	Context struct containing the key schedule * @out:	Buffer to store the ciphertext * @in:		Buffer containing the plaintext */void aes_encrypt(const struct crypto_aes_ctx *ctx, u8 *out, const u8 *in); /** * aes_decrypt - Decrypt a single AES block * @ctx:	Context struct containing the key schedule * @out:	Buffer to store the plaintext * @in:		Buffer containing the ciphertext */void aes_decrypt(const struct crypto_aes_ctx *ctx, u8 *out, const u8 *in); extern const u8 crypto_aes_sbox[];extern const u8 crypto_aes_inv_sbox[]; #endif