#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#define KEY_BITS 256
#define IV_BYTES 12
#define TAG_BYTES 16

#define MSG_OVERHEAD (IV_BYTES + TAG_BYTES)

typedef struct ESugGhzChatCryptoCtx ESubGhzChatCryptoCtx;

void crypto_init(void);

/* Function to clear sensitive memory. */
void crypto_explicit_bzero(void *s, size_t len);

ESubGhzChatCryptoCtx *crypto_ctx_alloc(void);
void crypto_ctx_free(ESubGhzChatCryptoCtx *ctx);

void crypto_ctx_clear(ESubGhzChatCryptoCtx *ctx);

bool crypto_ctx_set_key(ESubGhzChatCryptoCtx *ctx, const uint8_t *key);
void crypto_ctx_get_key(ESubGhzChatCryptoCtx *ctx, uint8_t *key);

bool crypto_ctx_decrypt(ESubGhzChatCryptoCtx *ctx, uint8_t *in, size_t in_len,
		uint8_t *out);
bool crypto_ctx_encrypt(ESubGhzChatCryptoCtx *ctx, uint8_t *in, size_t in_len,
		uint8_t *out);

#ifdef __cplusplus
}
#endif