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#ifndef crypto_secretstream_xchacha20poly1305_H
#define crypto_secretstream_xchacha20poly1305_H
#include <stddef.h>
#include "crypto_aead_xchacha20poly1305.h"
#include "crypto_stream_chacha20.h"
#include "export.h"
#ifdef __cplusplus
# ifdef __GNUC__
# pragma GCC diagnostic ignored "-Wlong-long"
# endif
extern "C" {
#endif
#define crypto_secretstream_xchacha20poly1305_ABYTES \
(1U + crypto_aead_xchacha20poly1305_ietf_ABYTES)
SODIUM_EXPORT
size_t crypto_secretstream_xchacha20poly1305_abytes(void);
#define crypto_secretstream_xchacha20poly1305_HEADERBYTES \
crypto_aead_xchacha20poly1305_ietf_NPUBBYTES
SODIUM_EXPORT
size_t crypto_secretstream_xchacha20poly1305_headerbytes(void);
#define crypto_secretstream_xchacha20poly1305_KEYBYTES \
crypto_aead_xchacha20poly1305_ietf_KEYBYTES
SODIUM_EXPORT
size_t crypto_secretstream_xchacha20poly1305_keybytes(void);
#define crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX \
SODIUM_MIN(SODIUM_SIZE_MAX, ((1ULL << 32) - 2ULL) * 64ULL)
SODIUM_EXPORT
size_t crypto_secretstream_xchacha20poly1305_messagebytes_max(void);
#define crypto_secretstream_xchacha20poly1305_TAG_MESSAGE 0x00
SODIUM_EXPORT
unsigned char crypto_secretstream_xchacha20poly1305_tag_message(void);
#define crypto_secretstream_xchacha20poly1305_TAG_PUSH 0x01
SODIUM_EXPORT
unsigned char crypto_secretstream_xchacha20poly1305_tag_push(void);
#define crypto_secretstream_xchacha20poly1305_TAG_REKEY 0x02
SODIUM_EXPORT
unsigned char crypto_secretstream_xchacha20poly1305_tag_rekey(void);
#define crypto_secretstream_xchacha20poly1305_TAG_FINAL \
(crypto_secretstream_xchacha20poly1305_TAG_PUSH | \
crypto_secretstream_xchacha20poly1305_TAG_REKEY)
SODIUM_EXPORT
unsigned char crypto_secretstream_xchacha20poly1305_tag_final(void);
typedef struct crypto_secretstream_xchacha20poly1305_state {
unsigned char k[crypto_stream_chacha20_ietf_KEYBYTES];
unsigned char nonce[crypto_stream_chacha20_ietf_NONCEBYTES];
unsigned char _pad[8];
} crypto_secretstream_xchacha20poly1305_state;
SODIUM_EXPORT
size_t crypto_secretstream_xchacha20poly1305_statebytes(void);
SODIUM_EXPORT
void crypto_secretstream_xchacha20poly1305_keygen
(unsigned char k[crypto_secretstream_xchacha20poly1305_KEYBYTES]);
SODIUM_EXPORT
int crypto_secretstream_xchacha20poly1305_init_push
(crypto_secretstream_xchacha20poly1305_state *state,
unsigned char header[crypto_secretstream_xchacha20poly1305_HEADERBYTES],
const unsigned char k[crypto_secretstream_xchacha20poly1305_KEYBYTES]);
SODIUM_EXPORT
int crypto_secretstream_xchacha20poly1305_push
(crypto_secretstream_xchacha20poly1305_state *state,
unsigned char *c, unsigned long long *clen_p,
const unsigned char *m, unsigned long long mlen,
const unsigned char *ad, unsigned long long adlen, unsigned char tag);
SODIUM_EXPORT
int crypto_secretstream_xchacha20poly1305_init_pull
(crypto_secretstream_xchacha20poly1305_state *state,
const unsigned char header[crypto_secretstream_xchacha20poly1305_HEADERBYTES],
const unsigned char k[crypto_secretstream_xchacha20poly1305_KEYBYTES]);
SODIUM_EXPORT
int crypto_secretstream_xchacha20poly1305_pull
(crypto_secretstream_xchacha20poly1305_state *state,
unsigned char *m, unsigned long long *mlen_p, unsigned char *tag_p,
const unsigned char *c, unsigned long long clen,
const unsigned char *ad, unsigned long long adlen);
SODIUM_EXPORT
void crypto_secretstream_xchacha20poly1305_rekey
(crypto_secretstream_xchacha20poly1305_state *state);
#ifdef __cplusplus
}
#endif
#endif
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