/**
 * @file pem_decrypt.h
 * @brief PEM file decryption
 *
 * @section License
 *
 * Copyright (C) 2021-2026 Oryx Embedded SARL. All rights reserved.
 *
 * This file is part of CycloneCRYPTO Open
 * 
 * SPDX-License-Identifier: GPL-2.0-or-later
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

 *
 * @author Oryx Embedded SARL (www.oryx-embedded.com)
 * @version 2.6.0
 **/

#ifndef _PEM_DECRYPT_H
#define _PEM_DECRYPT_H

//Dependencies
#include "core/crypto.h"
#include "pkix/pem_common.h"

//Encrypted private key support
#ifndef PEM_ENCRYPTED_KEY_SUPPORT
   #define PEM_ENCRYPTED_KEY_SUPPORT DISABLED
#elif (PEM_ENCRYPTED_KEY_SUPPORT != ENABLED && PEM_ENCRYPTED_KEY_SUPPORT != DISABLED)
   #error PEM_ENCRYPTED_KEY_SUPPORT parameter is not valid
#endif

//DES encryption support (insecure)
#ifndef PEM_DES_SUPPORT
   #define PEM_DES_SUPPORT DISABLED
#elif (PEM_DES_SUPPORT != ENABLED && PEM_DES_SUPPORT != DISABLED)
   #error PEM_DES_SUPPORT parameter is not valid
#endif

//Triple DES encryption support (weak)
#ifndef PEM_3DES_SUPPORT
   #define PEM_3DES_SUPPORT DISABLED
#elif (PEM_3DES_SUPPORT != ENABLED && PEM_3DES_SUPPORT != DISABLED)
   #error PEM_3DES_SUPPORT parameter is not valid
#endif

//AES encryption support
#ifndef PEM_AES_SUPPORT
   #define PEM_AES_SUPPORT ENABLED
#elif (PEM_AES_SUPPORT != ENABLED && PEM_AES_SUPPORT != DISABLED)
   #error PEM_AES_SUPPORT parameter is not valid
#endif

//Camellia cipher support?
#ifndef PEM_CAMELLIA_SUPPORT
   #define PEM_CAMELLIA_SUPPORT DISABLED
#elif (PEM_CAMELLIA_SUPPORT != ENABLED && PEM_CAMELLIA_SUPPORT != DISABLED)
   #error PEM_CAMELLIA_SUPPORT parameter is not valid
#endif

//ARIA cipher support?
#ifndef PEM_ARIA_SUPPORT
   #define PEM_ARIA_SUPPORT DISABLED
#elif (PEM_ARIA_SUPPORT != ENABLED && PEM_ARIA_SUPPORT != DISABLED)
   #error PEM_ARIA_SUPPORT parameter is not valid
#endif

//SM4 encryption support
#ifndef PEM_SM4_SUPPORT
   #define PEM_SM4_SUPPORT DISABLED
#elif (PEM_SM4_SUPPORT != ENABLED && PEM_SM4_SUPPORT != DISABLED)
   #error PEM_SM4_SUPPORT parameter is not valid
#endif

//C++ guard
#ifdef __cplusplus
extern "C" {
#endif

//PEM related functions
error_t pemDecryptPrivateKey(const char_t *input, size_t inputLen,
   const char_t *password, char_t *output, size_t *outputLen);

error_t pemDecryptMessage(const PemHeader *header, const char_t *password,
   const uint8_t *ciphertext, size_t ciphertextLen, uint8_t *plaintext,
   size_t *plaintextLen);

error_t pemFormatIv(const PemHeader *header, uint8_t *iv, size_t ivLen);

error_t pemKdf(const char_t *p, size_t pLen, const uint8_t *s, size_t sLen,
   uint8_t *dk, size_t dkLen);

const CipherAlgo *pemGetCipherAlgo(const PemString *algo);
uint_t pemGetKeyLength(const PemString *algo);

//C++ guard
#ifdef __cplusplus
}
#endif

#endif
