/**
 * @file se050_scp03.h
 * @brief SE050 Platform SCP03 Secure Channel Interface
 */

#ifndef SE050_SCP03_H
#define SE050_SCP03_H

#include <stdint.h>
#include <stddef.h>
#include "se050_i2c_hal.h"

/* Forward declarations */
typedef struct se050_session_ctx se050_session_ctx_t;

/* SCP03 key sizes */
#define SCP03_KEY_SIZE  16
#define SCP03_IV_SIZE   16
#define SCP03_CMAC_SIZE 8

/* Initialize SCP03 context */
se050_status_t se050_scp03_init(se050_scp03_ctx_t **ctx, se050_session_ctx_t *session);

/* Set SCP03 keys */
se050_status_t se050_scp03_set_keys(se050_scp03_ctx_t *ctx,
                         const uint8_t *enc_key,
                         const uint8_t *mac_key,
                         const uint8_t *dek_key);

/* Encrypt command */
se050_status_t se050_scp03_encrypt_command(se050_scp03_ctx_t *ctx,
                                uint8_t *cmd, size_t *cmd_len);

/* Decrypt response */
uint16_t se050_scp03_decrypt_response(se050_scp03_ctx_t *ctx,
                                 size_t cmd_len,
                                 uint8_t *rsp, size_t *rsp_len);

/* Cleanup SCP03 context */
void se050_scp03_cleanup(se050_scp03_ctx_t *ctx);

#endif /* SE050_SCP03_H */