sizes.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 "algorithm.h"

#define PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE(ciphertext_length) \
/* implementation-defined value */

#define PSA_AEAD_TAG_LENGTH(key_type, key_bits, alg)     \
    (PSA_ALG_IS_AEAD(alg) ?                              \
    (((alg) & 0x003f0000) >> 16) :                       \
    ((void) (key_type), (void) (key_bits), 0))

#define PSA_AEAD_TAG_MAX_SIZE (16)

#define PSA_AES_CCM_TAG_MAX_SIZE (16)

#define PSA_AEAD_DECRYPT_OUTPUT_SIZE(key_type, alg, ciphertext_length) \
        (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 &&                  \
            ((ciphertext_length) > PSA_AEAD_TAG_LENGTH(key_type, 0, alg)) ?   \
        (ciphertext_length) - PSA_AEAD_TAG_LENGTH(key_type, 0, alg) : 0)

#define PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE(plaintext_length) \
       ((plaintext_length) + PSA_AEAD_TAG_MAX_SIZE)

#define PSA_AEAD_ENCRYPT_OUTPUT_SIZE(key_type, alg, plaintext_length) \
        (PSA_AEAD_NONCE_LENGTH(key_type, alg) != 0 ?                  \
        (plaintext_length) + PSA_AEAD_TAG_LENGTH(key_type, 0, alg) : 0)

#define PSA_AEAD_FINISH_OUTPUT_MAX_SIZE /* implementation-defined value */

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

#define PSA_AEAD_NONCE_LENGTH(key_type, alg) \
    ((PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) == 16 && \
        ((PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_CCM) || \
        (PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_CCM))) || \
        (key_type == PSA_KEY_TYPE_CHACHA20 && \
        PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_CHACHA20_POLY1305) ? \
        12 : 0)

#define PSA_AEAD_NONCE_MAX_SIZE (13)

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

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

#define PSA_AEAD_VERIFY_OUTPUT_MAX_SIZE /* implementation-defined value */

#define PSA_AEAD_VERIFY_OUTPUT_SIZE(key_type, alg) \
/* implementation-defined value */
 
#ifdef __cplusplus
}
#endif