types.h

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/*
 * Copyright (C) 2025 TU Dresden
 * Copyright (C) 2021 HAW Hamburg
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once

 
#ifdef __cplusplus
extern "C" {
#endif
 
#include "crypto/psa/riot_ciphers.h"
#include "kernel_defines.h"
#include "psa/algorithm.h"
 
#if IS_USED(MODULE_PERIPH_CIPHER_AES_128_CBC)
#include "psa_periph_aes_ctx.h"
#endif
 
#if IS_USED(MODULE_PSA_SECURE_ELEMENT_ATECCX08A)
#include "atca_params.h"
#endif

typedef enum {
    PSA_CRYPTO_DRIVER_DECRYPT,
    PSA_CRYPTO_DRIVER_ENCRYPT
} psa_encrypt_or_decrypt_t;

typedef union {
#if IS_USED(MODULE_PSA_CIPHER_AES_128_ECB) ||\
    IS_USED(MODULE_PSA_CIPHER_AES_128_CBC) ||\
    defined(DOXYGEN)
    psa_cipher_aes_128_ctx_t aes_128;   
#endif
#if IS_USED(MODULE_PSA_CIPHER_AES_192_CBC) || defined(DOXYGEN)
    psa_cipher_aes_192_ctx_t aes_192;   
#endif
#if IS_USED(MODULE_PSA_CIPHER_AES_256_CBC) || defined(DOXYGEN)
    psa_cipher_aes_256_ctx_t aes_256;   
#endif
} psa_cipher_context_t;

typedef struct {
    psa_encrypt_or_decrypt_t direction; 
    union driver_context {
        unsigned dummy; 
    #if IS_USED(MODULE_PSA_SECURE_ELEMENT_ATECCX08A) || defined(DOXYGEN)
        atca_aes_cbc_ctx_t atca_aes_cbc;    
    #endif
    } drv_ctx;  
} psa_se_cipher_context_t;

struct psa_cipher_operation_s {
    uint8_t iv_required : 1;        
    uint8_t iv_set : 1;             
    uint8_t default_iv_length;      
    psa_algorithm_t alg;            
    union cipher_context {
        psa_cipher_context_t cipher_ctx;    
#if IS_USED(MODULE_PSA_SECURE_ELEMENT_ATECCX08A) || defined(DOXYGEN)
        psa_se_cipher_context_t se_ctx;     
#endif
    } backend_ctx;  
};

typedef struct psa_cipher_operation_s psa_cipher_operation_t;

#define PSA_CIPHER_OPERATION_INIT { 0 }

static inline psa_cipher_operation_t psa_cipher_operation_init(void)
{
    const psa_cipher_operation_t v = PSA_CIPHER_OPERATION_INIT;
 
    return v;
}
 
#ifdef __cplusplus
}
#endif