path: root/src/idevicerestore.c

/*
 * idevicerestore.c
 * Restore device firmware and filesystem
 *
 * 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <plist/plist.h>
#include <libirecovery.h>
#include <libimobiledevice/restore.h>
#include <libimobiledevice/lockdown.h>
#include <libimobiledevice/libimobiledevice.h>

#include "dfu.h"
#include "tss.h"
#include "img3.h"
#include "ipsw.h"
#include "normal.h"
#include "restore.h"
#include "recovery.h"
#include "idevicerestore.h"

int idevicerestore_quit = 0;
int idevicerestore_debug = 0;
int idevicerestore_erase = 0;
int idevicerestore_custom = 0;
int idevicerestore_verbose = 0;
idevicerestore_mode_t idevicerestore_mode = UNKNOWN_MODE;
idevicerestore_device_t idevicerestore_device = UNKNOWN_DEVICE;

void usage(int argc, char* argv[]);
int get_device(const char* uuid);
int check_mode(const char* uuid);
int get_ecid(const char* uuid, uint64_t* ecid);
int get_bdid(const char* uuid, uint32_t* bdid);
int get_cpid(const char* uuid, uint32_t* cpid);
int write_file(const char* filename, char* data, int size);
int extract_buildmanifest(const char* ipsw, plist_t* buildmanifest);
plist_t get_build_identity(plist_t buildmanifest, uint32_t identity);
int extract_filesystem(const char* ipsw, plist_t buildmanifest, char** filesystem);
int get_tss_data_by_name(plist_t tss, const char* entry, char** path, char** blob);
int get_tss_data_by_path(plist_t tss, const char* path, char** name, char** blob);
void device_callback(const idevice_event_t* event, void *user_data);
int get_signed_component_by_name(char* ipsw, plist_t tss, char* component, char** pdata, int* psize);
int get_signed_component_by_path(char* ipsw, plist_t tss, char* path, char** pdata, int* psize);

int check_mode(const char* uuid) {
	idevicerestore_mode_t mode = UNKNOWN_MODE;
	if (normal_check_mode(uuid) == 0) {
		info("Found device in normal mode\n");
		mode = NORMAL_MODE;
	}

	else if (recovery_check_mode() == 0) {
		info("Found device in recovery mode\n");
		mode = RECOVERY_MODE;
	}

	else if (dfu_check_mode() == 0) {
		info("Found device in DFU mode\n");
		mode = DFU_MODE;
	}

	else if (restore_check_mode(uuid) == 0) {
		info("Found device in restore mode\n");
		mode = RESTORE_MODE;
	}

	return mode;
}

int get_device(const char* uuid) {
	uint32_t bdid = 0;
	uint32_t cpid = 0;
	idevicerestore_device_t device = UNKNOWN_DEVICE;

	switch (idevicerestore_mode) {
	case NORMAL_MODE:
		device = normal_get_device(uuid);
		if (device < 0) {
			device = UNKNOWN_DEVICE;
		}
		break;

	case DFU_MODE:
	case RECOVERY_MODE:
		if (get_cpid(uuid, &cpid) < 0) {
			error("ERROR: Unable to get device CPID\n");
			break;
		}

		switch (cpid) {
		case IPHONE2G_CPID:
			// iPhone1,1 iPhone1,2 and iPod1,1 all share the same ChipID
			//   so we need to check the BoardID
			if (get_bdid(uuid, &bdid) < 0) {
				error("ERROR: Unable to get device BDID\n");
				break;
			}

			switch (bdid) {
			case IPHONE2G_BDID:
				device = IPHONE2G_DEVICE;
				break;

			case IPHONE3G_BDID:
				device = IPHONE3G_DEVICE;
				break;

			case IPOD1G_BDID:
				device = IPOD1G_DEVICE;
				break;

			default:
				device = UNKNOWN_DEVICE;
				break;
			}
			break;

		case IPHONE3GS_CPID:
			device = IPHONE3GS_DEVICE;
			break;

		case IPOD2G_CPID:
			device = IPOD2G_DEVICE;
			break;

		case IPOD3G_CPID:
			device = IPOD3G_DEVICE;
			break;

		case IPAD1G_CPID:
			device = IPAD1G_DEVICE;
			break;

		default:
			device = UNKNOWN_DEVICE;
			break;
		}
		break;

	default:
		device = UNKNOWN_MODE;
		break;

	}

	return device;
}

int get_bdid(const char* uuid, uint32_t* bdid) {
	switch (idevicerestore_mode) {
	case NORMAL_MODE:
		if (normal_get_bdid(uuid, bdid) < 0) {
			*bdid = -1;
			return -1;
		}
		break;

	case RECOVERY_MODE:
		if (recovery_get_bdid(bdid) < 0) {
			*bdid = -1;
			return -1;
		}
		break;

	case DFU_MODE:
		if (dfu_get_bdid(bdid) < 0) {
			*bdid = -1;
			return -1;
		}
		break;

	default:
		error("ERROR: Device is in an invalid state\n");
		return -1;
	}

	return 0;
}

int get_cpid(const char* uuid, uint32_t* cpid) {
	switch (idevicerestore_mode) {
	case NORMAL_MODE:
		if (normal_get_cpid(uuid, cpid) < 0) {
			*cpid = 0;
			return -1;
		}
		break;

	case RECOVERY_MODE:
		if (recovery_get_cpid(cpid) < 0) {
			*cpid = 0;
			return -1;
		}
		break;

	case DFU_MODE:
		if (dfu_get_cpid(cpid) < 0) {
			*cpid = 0;
			return -1;
		}
		break;

	default:
		error("ERROR: Device is in an invalid state\n");
		return -1;
	}

	return 0;
}

int get_ecid(const char* uuid, uint64_t* ecid) {
	switch (idevicerestore_mode) {
	case NORMAL_MODE:
		if (normal_get_ecid(uuid, ecid) < 0) {
			*ecid = 0;
			return -1;
		}
		break;

	case RECOVERY_MODE:
		if (recovery_get_ecid(ecid) < 0) {
			*ecid = 0;
			return -1;
		}
		break;

	case DFU_MODE:
		if (dfu_get_ecid(ecid) < 0) {
			*ecid = 0;
			return -1;
		}
		break;

	default:
		error("ERROR: Device is in an invalid state\n");
		return -1;
	}

	return 0;
}

int extract_buildmanifest(const char* ipsw, plist_t* buildmanifest) {
	int size = 0;
	char* data = NULL;
	if (idevicerestore_device >= IPHONE2G_DEVICE && idevicerestore_device <= IPOD2G_DEVICE) {
		// Older devices that don't require personalized firmwares use BuildManifesto.plist
		if (ipsw_extract_to_memory(ipsw, "BuildManifesto.plist", &data, &size) < 0) {
			return -1;
		}

	} else if (idevicerestore_device >= IPHONE3GS_DEVICE && idevicerestore_device <= IPAD1G_DEVICE) {
		// Whereas newer devices that do require personalized firmwares use BuildManifest.plist
		if (ipsw_extract_to_memory(ipsw, "BuildManifest.plist", &data, &size) < 0) {
			return -1;
		}

	} else {
		return -1;
	}

	plist_from_xml(data, size, buildmanifest);
	return 0;
}

plist_t get_build_identity(plist_t buildmanifest, uint32_t identity) {

	// fetch build identities array from BuildManifest
	plist_t build_identities_array = plist_dict_get_item(buildmanifest, "BuildIdentities");
	if (!build_identities_array || plist_get_node_type(build_identities_array) != PLIST_ARRAY) {
		error("ERROR: Unable to find build identities node\n");
		return NULL;
	}

	// check and make sure this identity exists in buildmanifest
	if(identity >= plist_array_get_size(build_identities_array)) {
		return NULL;
	}

	plist_t build_identity = plist_array_get_item(build_identities_array, identity);
	if (!build_identity || plist_get_node_type(build_identity) != PLIST_DICT) {
		error("ERROR: Unable to find build identities node\n");
		return NULL;
	}

	return build_identity;
}

int extract_filesystem(const char* ipsw, plist_t build_identity, char** filesystem) {
	char* filename = NULL;

	int sz = 0;
	char* xml = NULL;
	plist_to_xml(build_identity, &xml, &sz);
	debug("%s", xml);
	free(xml);

	plist_t manifest_node = plist_dict_get_item(build_identity, "Manifest");
	if (!manifest_node || plist_get_node_type(manifest_node) != PLIST_DICT) {
		error("ERROR: Unable to find manifest node\n");
		return -1;
	}

	plist_t filesystem_node = plist_dict_get_item(manifest_node, "OS");
	if (!filesystem_node || plist_get_node_type(filesystem_node) != PLIST_DICT) {
		error("ERROR: Unable to find filesystem node\n");
		return -1;
	}

	plist_t filesystem_info_node = plist_dict_get_item(filesystem_node, "Info");
	if (!filesystem_info_node || plist_get_node_type(filesystem_info_node) != PLIST_DICT) {
		error("ERROR: Unable to find filesystem info node\n");
		return -1;
	}

	plist_t filesystem_info_path_node = plist_dict_get_item(filesystem_info_node, "Path");
	if (!filesystem_info_path_node || plist_get_node_type(filesystem_info_path_node) != PLIST_STRING) {
		error("ERROR: Unable to find filesystem info path node\n");
		return -1;
	}
	plist_get_string_val(filesystem_info_path_node, &filename);

	info("Extracting filesystem from IPSW\n");
	if (ipsw_extract_to_file(ipsw, filename, filename) < 0) {
		error("ERROR: Unable to extract filesystem\n");
		return -1;
	}

	*filesystem = filename;
	return 0;
}

int main(int argc, char* argv[]) {
	int opt = 0;
	char* ipsw = NULL;
	char* uuid = NULL;
	uint64_t ecid = 0;
	while ((opt = getopt(argc, argv, "vdhceu:")) > 0) {
		switch (opt) {
		case 'h':
			usage(argc, argv);
			break;

		case 'd':
			idevicerestore_debug = 1;
			break;

		case 'e':
			idevicerestore_erase = 1;
			break;

		case 'c':
			idevicerestore_custom = 1;
			break;

		case 'v':
			idevicerestore_verbose = 1;
			break;

		case 'u':
			uuid = optarg;
			break;

		default:
			usage(argc, argv);
			return -1;
		}
	}

	argc -= optind;
	argv += optind;

	if (argc == 1)
		ipsw = argv[0];

	if (ipsw == NULL) {
		usage(argc, argv);
		error("ERROR: Please supply an IPSW\n");
		return -1;
	}

	// check which mode the device is currently in so we know where to start
	idevicerestore_mode = check_mode(uuid);
	if (idevicerestore_mode < 0) {
		error("ERROR: Unable to discover device current mode\n");
		return -1;
	}

	// discover the device type
	idevicerestore_device = get_device(uuid);
	if (idevicerestore_device < 0) {
		error("ERROR: Unable to discover device type\n");
		return -1;
	}

	// extract buildmanifest
	plist_t buildmanifest = NULL;
	info("Extracting BuildManifest from IPSW\n");
	if (extract_buildmanifest(ipsw, &buildmanifest) < 0) {
		error("ERROR: Unable to extract BuildManifest from %s\n", ipsw);
		return -1;
	}

	// choose whether this is an upgrade or a restore (default to upgrade)
	plist_t build_identity = NULL;
	if(idevicerestore_erase) {
		build_identity = get_build_identity(buildmanifest, 0);
		if(build_identity == NULL) {
			error("ERROR: Unable to find build any identities\n");
			plist_free(buildmanifest);
			return -1;
		}

	} else {
		build_identity = get_build_identity(buildmanifest, 1);
		if(build_identity == NULL) {
			build_identity = get_build_identity(buildmanifest, 0);
			if(build_identity == NULL) {
				error("ERROR: Unable to find build any identities\n");
				plist_free(buildmanifest);
				return -1;
			}
			info("No upgrade ramdisk found, default to full restore\n");
		}
	}

	// devices are listed in order from oldest to newest
	// devices that come after iPod2g require personalized firmwares
	plist_t tss_request = NULL;
	plist_t tss = NULL;
	if(idevicerestore_device > IPOD2G_DEVICE) {

		info("Creating TSS request\n");
		// fetch the device's ECID for the TSS request
		if (get_ecid(uuid, &ecid) < 0 || ecid == 0) {
			error("ERROR: Unable to find device ECID\n");
			return -1;
		}
		info("Found ECID %llu\n", ecid);

		tss_request = tss_create_request(build_identity, ecid);
		if (tss_request == NULL) {
			error("ERROR: Unable to create TSS request\n");
			plist_free(buildmanifest);
			return -1;
		}

		info("Sending TSS request\n");
		tss = tss_send_request(tss_request);
		if (tss == NULL) {
			error("ERROR: Unable to get response from TSS server\n");
			plist_free(tss_request);
			return -1;
		}
		info("Got TSS response\n");
		plist_free(tss_request);
	}

	// Extract filesystem from IPSW and return its name
	char* filesystem = NULL;
	if(extract_filesystem(ipsw, build_identity, &filesystem) < 0) {
		error("ERROR: Unable to extract filesystem from IPSW\n");
		if(tss) plist_free(tss);
		plist_free(buildmanifest);
		return -1;
	}

	// place device into recovery mode if required
	if (idevicerestore_mode == NORMAL_MODE) {
		info("Entering recovery mode...\n");
		if (normal_enter_recovery(uuid) < 0) {
			error("ERROR: Unable to place device into recovery mode\n");
			if(tss) plist_free(tss);
			plist_free(buildmanifest);
			return -1;
		}
	}

	// place device into restore mode if required
	if (idevicerestore_mode == RECOVERY_MODE) {
		if (recovery_enter_restore(ipsw, tss) < 0) {
			error("ERROR: Unable to place device into restore mode\n");
			if(tss) plist_free(tss);
			plist_free(buildmanifest);
			return -1;
		}
	}

	idevice_event_subscribe(&device_callback, NULL);
	info("Waiting for device to enter restore mode\n");
	// block program until device has entered restore mode
	while (idevicerestore_mode != RESTORE_MODE) {
		sleep(1);
	}

	idevice_t device = NULL;
	idevice_error_t device_error = idevice_new(&device, uuid);
	if (device_error != IDEVICE_E_SUCCESS) {
		error("ERROR: Unable to open device\n");
		plist_free(tss);
		return -1;
	}

	restored_client_t restore = NULL;
	restored_error_t restore_error = restored_client_new(device, &restore, "idevicerestore");
	if (restore_error != RESTORE_E_SUCCESS) {
		error("ERROR: Unable to start restored client\n");
		plist_free(tss);
		idevice_free(device);
		return -1;
	}

	char* type = NULL;
	uint64_t version = 0;
	if (restored_query_type(restore, &type, &version) != RESTORE_E_SUCCESS) {
		error("ERROR: Device is not in restore mode. QueryType returned \"%s\"\n", type);
		plist_free(tss);
		restored_client_free(restore);
		idevice_free(device);
		return -1;
	}
	info("Device has successfully entered restore mode\n");

	/* start restore process */
	char* kernelcache = NULL;
	info("Restore protocol version is %llu.\n", version);
	restore_error = restored_start_restore(restore);
	if (restore_error == RESTORE_E_SUCCESS) {
		while (!idevicerestore_quit) {
			plist_t message = NULL;
			restore_error = restored_receive(restore, &message);
			plist_t msgtype_node = plist_dict_get_item(message, "MsgType");
			if (msgtype_node && PLIST_STRING == plist_get_node_type(msgtype_node)) {
				char *msgtype = NULL;
				plist_get_string_val(msgtype_node, &msgtype);
				if (!strcmp(msgtype, "ProgressMsg")) {
					restore_error = restore_handle_progress_msg(restore, message);

				} else if (!strcmp(msgtype, "DataRequestMsg")) {
					// device is requesting data to be sent
					plist_t datatype_node = plist_dict_get_item(message, "DataType");
					if (datatype_node && PLIST_STRING == plist_get_node_type(datatype_node)) {
						char *datatype = NULL;
						plist_get_string_val(datatype_node, &datatype);
						if (!strcmp(datatype, "SystemImageData")) {
							restore_send_filesystem(device, restore, filesystem);

						} else if (!strcmp(datatype, "KernelCache")) {
							int kernelcache_size = 0;
							char* kernelcache_data = NULL;
							if (get_signed_component_by_name(ipsw, tss, "KernelCache", &kernelcache_data, &kernelcache_size) < 0) {
								error("ERROR: Unable to get kernelcache file\n");
								return -1;
							}
							restore_send_kernelcache(restore, kernelcache_data, kernelcache_size);
							free(kernelcache_data);

						} else if (!strcmp(datatype, "NORData")) {
							restore_send_nor(restore, ipsw, tss);

						} else {
							// Unknown DataType!!
							error("Unknown DataType\n");
							return -1;
						}
					}

				} else if (!strcmp(msgtype, "StatusMsg")) {
					restore_error = restore_handle_status_msg(restore, message);

				} else {
					info("Received unknown message type: %s\n", msgtype);
				}
			}

			if (RESTORE_E_SUCCESS != restore_error) {
				error("Invalid return status %d\n", restore_error);
				//idevicerestore_quit = 1;
			}

			plist_free(message);
		}
	} else {
		error("ERROR: Could not start restore. %d\n", restore_error);
	}

	restored_client_free(restore);
	plist_free(tss);
	idevice_free(device);
	unlink(filesystem);
	return 0;
}

void device_callback(const idevice_event_t* event, void *user_data) {
	if (event->event == IDEVICE_DEVICE_ADD) {
		idevicerestore_mode = RESTORE_MODE;
	} else if (event->event == IDEVICE_DEVICE_REMOVE) {
		idevicerestore_quit = 1;
	}
}

void usage(int argc, char* argv[]) {
	char *name = strrchr(argv[0], '/');
	printf("Usage: %s [OPTIONS] FILE\n", (name ? name + 1 : argv[0]));
	printf("Restore/upgrade IPSW firmware FILE to an iPhone/iPod Touch.\n");
	printf("  -d, \t\tenable communication debugging\n");
	printf("  -u, \t\ttarget specific device by its 40-digit device UUID\n");
	printf("  -h, \t\tprints usage information\n");
	printf("  -c, \t\trestore with a custom firmware\n");
	printf("  -v, \t\tenable verbose output\n");
	printf("\n");
}

int write_file(const char* filename, char* data, int size) {
	debug("Writing data to %s\n", filename);
	FILE* file = fopen(filename, "wb");
	if (file == NULL) {
		error("read_file: Unable to open file %s\n", filename);
		return -1;
	}

	int bytes = fwrite(data, 1, size, file);
	fclose(file);

	if (bytes != size) {
		error("ERROR: Unable to write entire file: %s: %d %d\n", filename, bytes, size);
		return -1;
	}

	return size;
}

int get_tss_data_by_path(plist_t tss, const char* path, char** pname, char** pblob) {
	*pname = NULL;
	*pblob = NULL;

	char* key = NULL;
	plist_t tss_entry = NULL;
	plist_dict_iter iter = NULL;
	plist_dict_new_iter(tss, &iter);
	while (1) {
		plist_dict_next_item(tss, iter, &key, &tss_entry);
		if (key == NULL)
			break;

		if (!tss_entry || plist_get_node_type(tss_entry) != PLIST_DICT) {
			continue;
		}

		char* entry_path = NULL;
		plist_t entry_path_node = plist_dict_get_item(tss_entry, "Path");
		if (!entry_path_node || plist_get_node_type(entry_path_node) != PLIST_STRING) {
			error("ERROR: Unable to find TSS path node in entry %s\n", key);
			return -1;
		}
		plist_get_string_val(entry_path_node, &entry_path);
		if (strcmp(path, entry_path) == 0) {
			char* blob = NULL;
			uint64_t blob_size = 0;
			plist_t blob_node = plist_dict_get_item(tss_entry, "Blob");
			if (!blob_node || plist_get_node_type(blob_node) != PLIST_DATA) {
				error("ERROR: Unable to find TSS blob node in entry %s\n", key);
				return -1;
			}
			plist_get_data_val(blob_node, &blob, &blob_size);
			*pname = key;
			*pblob = blob;
			return 0;
		}

		free(key);
	}
	plist_free(tss_entry);

	return -1;
}

int get_tss_data_by_name(plist_t tss, const char* entry, char** ppath, char** pblob) {
	*ppath = NULL;
	*pblob = NULL;

	plist_t node = plist_dict_get_item(tss, entry);
	if (!node || plist_get_node_type(node) != PLIST_DICT) {
		error("ERROR: Unable to find %s entry in TSS response\n", entry);
		return -1;
	}

	char* path = NULL;
	plist_t path_node = plist_dict_get_item(node, "Path");
	if (!path_node || plist_get_node_type(path_node) != PLIST_STRING) {
		error("ERROR: Unable to find %s path in entry\n", path);
		return -1;
	}
	plist_get_string_val(path_node, &path);

	char* blob = NULL;
	uint64_t blob_size = 0;
	plist_t blob_node = plist_dict_get_item(node, "Blob");
	if (!blob_node || plist_get_node_type(blob_node) != PLIST_DATA) {
		error("ERROR: Unable to find %s blob in entry\n", path);
		free(path);
		return -1;
	}
	plist_get_data_val(blob_node, &blob, &blob_size);

	*ppath = path;
	*pblob = blob;
	return 0;
}

int get_signed_component_by_name(char* ipsw, plist_t tss, char* component, char** pdata, int* psize) {
	int size = 0;
	char* data = NULL;
	char* path = NULL;
	char* blob = NULL;
	img3_file* img3 = NULL;
	irecv_error_t error = 0;

	info("Extracting %s from TSS response\n", component);
	if (get_tss_data_by_name(tss, component, &path, &blob) < 0) {
		error("ERROR: Unable to get data for TSS %s entry\n", component);
		return -1;
	}

	info("Extracting %s from %s\n", path, ipsw);
	if (ipsw_extract_to_memory(ipsw, path, &data, &size) < 0) {
		error("ERROR: Unable to extract %s from %s\n", path, ipsw);
		free(path);
		free(blob);
		return -1;
	}

	img3 = img3_parse_file(data, size);
	if (img3 == NULL) {
		error("ERROR: Unable to parse IMG3: %s\n", path);
		free(data);
		free(path);
		free(blob);
		return -1;
	}
	if (data) {
		free(data);
		data = NULL;
	}

	if (idevicerestore_custom == 0) {
		if (img3_replace_signature(img3, blob) < 0) {
			error("ERROR: Unable to replace IMG3 signature\n");
			free(path);
			free(blob);
			return -1;
		}
	}

	if (img3_get_data(img3, &data, &size) < 0) {
		error("ERROR: Unable to reconstruct IMG3\n");
		img3_free(img3);
		free(path);
		return -1;
	}

	if (idevicerestore_debug) {
		char* out = strrchr(path, '/');
		if (out != NULL) {
			out++;
		} else {
			out = path;
		}
		write_file(out, data, size);
	}

	if (img3) {
		img3_free(img3);
		img3 = NULL;
	}
	if (blob) {
		free(blob);
		blob = NULL;
	}
	if (path) {
		free(path);
		path = NULL;
	}

	*pdata = data;
	*psize = size;
	return 0;
}

int get_signed_component_by_path(char* ipsw, plist_t tss, char* path, char** pdata, int* psize) {
	int size = 0;
	char* data = NULL;
	char* name = NULL;
	char* blob = NULL;
	img3_file* img3 = NULL;
	irecv_error_t error = 0;

	info("Extracting %s from TSS response\n", path);
	if (get_tss_data_by_path(tss, path, &name, &blob) < 0) {
		error("ERROR: Unable to get data for TSS %s entry\n", path);
		return -1;
	}

	info("Extracting %s from %s\n", path, ipsw);
	if (ipsw_extract_to_memory(ipsw, path, &data, &size) < 0) {
		error("ERROR: Unable to extract %s from %s\n", path, ipsw);
		free(path);
		free(blob);
		return -1;
	}

	img3 = img3_parse_file(data, size);
	if (img3 == NULL) {
		error("ERROR: Unable to parse IMG3: %s\n", path);
		free(data);
		free(path);
		free(blob);
		return -1;
	}
	if (data) {
		free(data);
		data = NULL;
	}

	if (idevicerestore_custom == 0) {
		if (img3_replace_signature(img3, blob) < 0) {
			error("ERROR: Unable to replace IMG3 signature\n");
			free(name);
			free(blob);
			return -1;
		}
	}

	if (img3_get_data(img3, &data, &size) < 0) {
		error("ERROR: Unable to reconstruct IMG3\n");
		img3_free(img3);
		free(name);
		return -1;
	}

	if (idevicerestore_debug) {
		char* out = strrchr(path, '/');
		if (out != NULL) {
			out++;
		} else {
			out = path;
		}
		write_file(out, data, size);
	}

	if (img3) {
		img3_free(img3);
		img3 = NULL;
	}
	if (blob) {
		free(blob);
		blob = NULL;
	}
	if (path) {
		free(name);
		name = NULL;
	}

	*pdata = data;
	*psize = size;
	return 0;
}