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#ifndef CRYPTO_AES_H_
#define CRYPTO_AES_H_
#include <stddef.h>
#include <stdint.h>
/* Opaque structure. */
struct crypto_aes_key;
/**
* crypto_aes_can_use_intrinsics(void):
* Test whether hardware intrinsics are safe to use. Return 1 if x86 AESNI
* operations are available, 2 if ARM-AES operations are available, or 0 if
* none are available.
*/
int crypto_aes_can_use_intrinsics(void);
/**
* crypto_aes_key_expand(key_unexpanded, len):
* Expand the ${len}-byte unexpanded AES key ${key_unexpanded} into a
* structure which can be passed to crypto_aes_encrypt_block(). The length
* must be 16 or 32.
*/
struct crypto_aes_key * crypto_aes_key_expand(const uint8_t *, size_t);
/**
* crypto_aes_encrypt_block(in, out, key):
* Using the expanded AES key ${key}, encrypt the block ${in} and write the
* resulting ciphertext to ${out}. ${in} and ${out} can overlap.
*/
void crypto_aes_encrypt_block(const uint8_t[16], uint8_t[16],
const struct crypto_aes_key *);
/**
* crypto_aes_key_free(key):
* Free the expanded AES key ${key}.
*/
void crypto_aes_key_free(struct crypto_aes_key *);
#endif /* !CRYPTO_AES_H_ */
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