sizes.h

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/*
 * SPDX-FileCopyrightText: 2025 TU Dresden
 * SPDX-FileCopyrightText: 2021 HAW Hamburg
 * SPDX-License-Identifier: LGPL-2.1-only
 */
 
#pragma once

 
#ifdef __cplusplus
extern "C" {
#endif
 
#include "kernel_defines.h"
#include "psa/cipher/algorithm.h"
#include "psa/key/type.h"

#define PSA_BLOCK_CIPHER_BLOCK_LENGTH(type)                                     \
    (1u << (((type) >> 8) & 7))

#define PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE /* implementation-defined value */

#define PSA_CIPHER_IV_LENGTH(key_type, alg) \
    ((PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) > 1 && \
     ((alg) == PSA_ALG_CBC_NO_PADDING)) ? 16 : \
     (key_type == PSA_KEY_TYPE_CHACHA20) ? 12 : 0)

#define PSA_CIPHER_IV_MAX_SIZE /* implementation-defined value */

#define PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
    (input_length + PSA_CIPHER_IV_LENGTH(key_type, alg))

#define PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(input_length) \
    (PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(PSA_KEY_TYPE_AES, PSA_ALG_CBC_NO_PADDING, input_length))

#define PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
    (input_length - PSA_CIPHER_IV_LENGTH(key_type, alg))

#define PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(input_length) \
    (input_length)

#define PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
/* implementation-defined value */

#define PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input_length) \
/* implementation-defined value */

#define PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg) \
/* implementation-defined value */

#define PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE /* implementation-defined value */
 
#ifdef __cplusplus
}
#endif