Momentum-Apps/crypto_wrapper.h

#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#define RUN_ID_BYTES (sizeof(uint64_t))
#define COUNTER_BYTES (sizeof(uint32_t))
#define KEY_BITS 256
#define IV_BYTES 12
#define TAG_BYTES 16

#define MSG_OVERHEAD (RUN_ID_BYTES + COUNTER_BYTES + 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,
		FuriString *flipper_name, uint32_t tick);
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);

typedef bool (*CryptoCtxReplayDictWriter)(uint64_t run_id, uint32_t counter,
		void *context);
typedef bool (*CryptoCtxReplayDictReader)(uint64_t *run_id, uint32_t *counter,
		void *context);

size_t crypto_ctx_dump_replay_dict(ESubGhzChatCryptoCtx *ctx,
		CryptoCtxReplayDictWriter writer, void *writer_ctx);
size_t crypto_ctx_read_replay_dict(ESubGhzChatCryptoCtx *ctx,
		CryptoCtxReplayDictReader reader, void *reader_ctx);

#ifdef __cplusplus
}
#endif