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/*
* ipsw.h
* Utilities for extracting and manipulating IPSWs
*
* Copyright (c) 2010 Joshua Hill. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zip.h>
#include <stdlib.h>
#include <string.h>
#include "ipsw.h"
ipsw_archive* ipsw_open(const char* ipsw) {
int err = 0;
ipsw_archive* archive = (ipsw_archive*) malloc(sizeof(ipsw_archive));
if(archive == NULL) {
error("ERROR: Out of memory\n");
return NULL;
}
archive->zip = zip_open(ipsw, 0, &err);
if(archive->zip == NULL) {
error("ERROR: zip_open: %s: %d\n", ipsw, err);
free(archive);
return NULL;
}
return archive;
}
ipsw_file* ipsw_extract_file(ipsw_archive* archive, const char* filename) {
if(archive == NULL || archive->zip == NULL) {
error("ERROR: Invalid archive\n");
return NULL;
}
int zindex = zip_name_locate(archive->zip, filename, 0);
if(zindex < 0) {
error("ERROR: zip_name_locate: %s\n", filename);
return NULL;
}
struct zip_stat zstat;
zip_stat_init(&zstat);
if(zip_stat_index(archive->zip, zindex, 0, &zstat) != 0) {
error("ERROR: zip_stat_index: %s\n", filename);
return NULL;
}
struct zip_file* zfile = zip_fopen_index(archive->zip, zindex, 0);
if(zfile == NULL) {
error("ERROR: zip_fopen_index: %s\n", filename);
return NULL;
}
ipsw_file* file = (ipsw_file*) malloc(sizeof(ipsw_file));
if(file == NULL) {
error("ERROR: Out of memory\n");
zip_fclose(zfile);
return NULL;
}
file->size = zstat.size;
file->index = zstat.index;
file->name = strdup(zstat.name);
file->data = (unsigned char*) malloc(file->size);
if(file->data == NULL) {
error("ERROR: Out of memory\n");
ipsw_free_file(file);
zip_fclose(zfile);
return NULL;
}
if(zip_fread(zfile, file->data, file->size) != file->size) {
error("ERROR: zip_fread: %s\n", filename);
ipsw_free_file(file);
zip_fclose(zfile);
return NULL;
}
zip_fclose(zfile);
return file;
}
void ipsw_free_file(ipsw_file* file) {
if(file != NULL) {
if(file->name != NULL) {
free(file->name);
}
if(file->data != NULL) {
free(file->data);
}
free(file);
}
}
void ipsw_close(ipsw_archive* archive) {
if(archive != NULL) {
zip_unchange_all(archive->zip);
zip_close(archive->zip);
free(archive);
}
}
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