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/* This file is part of Nekopack.
Copyright (C) 2017 Jakob Tsar-Fox, All Rights Reserved.
Nekopack 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 3 of the License, or (at
your option) any later version.
Nekopack 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 Nekopack. If not, see <http://www.gnu.org/licenses/>. */
#pragma once
#include <stdint.h>
#include <zlib.h>
#include "cli.h"
/* Struct for a game's encryption keys. */
typedef struct {
int uses_initial_key; /* Set if first byte uses a different key. */
uint32_t master_key; /* Master key used to derive a key. */
uint8_t initial_fallback_key; /* Fallback for the initial key. */
uint8_t primary_fallback_key; /* Fallback for the primary key. */
} key;
/* Returns the encryption keys for a given game value. */
key get_encryption_key(game current_game);
/* Decrypts the contents of a buffer according to a file key. */
void decrypt_buffer(Bytef *encrypted_buffer, uint64_t buffer_length,
key encryption_key, uint32_t file_key);
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