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/* SPDX-License-Identifier: MIT */
/*
* konpack.h
*
* Copyright (c) 2026 KonAki
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef KONPACK_H
#define KONPACK_H
#include <stdint.h>
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
/*** definition ***/
#define KON_PACK_KEY_SIZE 32
typedef struct kon_pack kon_pack_t;
/* pass key as NULL for a pack that was made without one */
kon_pack_t *kon_packOpen(const char *path, const uint8_t *key);
void kon_packClose(kon_pack_t *pack);
int kon_packCount(const kon_pack_t *pack);
const char *kon_packName(const kon_pack_t *pack, int index);
uint32_t kon_packSize(const kon_pack_t *pack, int index);
/* -1 if the name is not in the pack. names use / and are relative to the folder the pack was made from */
int kon_packFind(const kon_pack_t *pack, const char *name);
/* returns a malloc'd copy of the file that you free, with one extra 0 byte after the end that is not counted in size.
NULL if it fails, see kon_packError */
uint8_t *kon_packRead(kon_pack_t *pack, int index, size_t *size);
const char *kon_packError(void);
uint32_t kon_crc32(const uint8_t *data, size_t length);
/* same call encrypts and decrypts, in and out can be the same buffer. nonce must never repeat for the same key */
void kon_chacha20Xor(const uint8_t key[KON_PACK_KEY_SIZE], const uint8_t nonce[12], uint32_t counter, const uint8_t *in, uint8_t *out, size_t length);
#ifdef KONPACK_WRITER
/* files are paths on disk, baseDir is cut off the front to make the names in the pack. key can be NULL for no encryption.
returns 0 on success, otherwise see kon_packError */
int kon_packWrite(const char *outPath, const uint8_t *key, const char *baseDir, const char *const *files, int count);
#endif
#ifdef __cplusplus
}
#endif
#endif
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