sizes.h

Go to the documentation of this file.

/*
 * 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 "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 64
 
#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 16
 
#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) \
    > PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(PSA_KEY_TYPE_CHACHA20, PSA_ALG_STREAM_CIPHER, input_length) \
    ? PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(PSA_KEY_TYPE_AES, PSA_ALG_CBC_NO_PADDING, input_length) \
    : PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(PSA_KEY_TYPE_CHACHA20, PSA_ALG_STREAM_CIPHER, 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) \
    ((key_type == PSA_KEY_TYPE_CHACHA20 \
    && alg == PSA_ALG_STREAM_CIPHER) ? (input_length + 64) : 0)
 
#define PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input_length) \
    (input_length + 64)
 
#define PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg) \
    ((key_type == PSA_KEY_TYPE_CHACHA20) ? 64 : 0 )
 
#define PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE 64
 
#ifdef __cplusplus
}
#endif