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#ifndef _CRYPTO_AESCTR_H_
#define _CRYPTO_AESCTR_H_
#include <stddef.h>
#include <stdint.h>
/* Opaque types. */
struct crypto_aes_key;
struct crypto_aesctr;
/**
* crypto_aesctr_init(key, nonce):
* Prepare to encrypt/decrypt data with AES in CTR mode, using the provided
* expanded key and nonce. The key provided must remain valid for the
* lifetime of the stream.
*/
struct crypto_aesctr * crypto_aesctr_init(const struct crypto_aes_key *,
uint64_t);
/**
* crypto_aesctr_stream(stream, inbuf, outbuf, buflen):
* Generate the next ${buflen} bytes of the AES-CTR stream and xor them with
* bytes from ${inbuf}, writing the result into ${outbuf}. If the buffers
* ${inbuf} and ${outbuf} overlap, they must be identical.
*/
void crypto_aesctr_stream(struct crypto_aesctr *, const uint8_t *,
uint8_t *, size_t);
/**
* crypto_aesctr_free(stream):
* Free the provided stream object.
*/
void crypto_aesctr_free(struct crypto_aesctr *);
/**
* crypto_aesctr_buf(key, nonce, inbuf, outbuf, buflen):
* Equivalent to init(key, nonce); stream(inbuf, outbuf, buflen); free.
*/
void crypto_aesctr_buf(const struct crypto_aes_key *, uint64_t,
const uint8_t *, uint8_t *, size_t);
#endif /* !_CRYPTO_AESCTR_H_ */
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