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

	if (build_identity_get_component_path(build_identity, "OS", &filename) < 0) {
		error("ERROR: Unable get path for filesystem component\n");
		return -1;
	}

	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;
}
Example #2
0
int idevicerestore_start(struct idevicerestore_client_t* client)
{
	int tss_enabled = 0;
	int result = 0;

	if (!client) {
		return -1;
	}

	if ((client->flags & FLAG_LATEST) && (client->flags & FLAG_CUSTOM)) {
		error("ERROR: FLAG_LATEST cannot be used with FLAG_CUSTOM.\n");
		return -1;
	}

	if (!client->ipsw && !(client->flags & FLAG_PWN) && !(client->flags & FLAG_LATEST)) {
		error("ERROR: no ipsw file given\n");
		return -1;
	}

	if (client->flags & FLAG_DEBUG) {
		idevice_set_debug_level(1);
		irecv_set_debug_level(1);
		idevicerestore_debug = 1;
	}

	idevicerestore_progress(client, RESTORE_STEP_DETECT, 0.0);

	// update version data (from cache, or apple if too old)
	load_version_data(client);

	// check which mode the device is currently in so we know where to start
	if (check_mode(client) < 0 || client->mode->index == MODE_UNKNOWN) {
		error("ERROR: Unable to discover device mode. Please make sure a device is attached.\n");
		return -1;
	}
	idevicerestore_progress(client, RESTORE_STEP_DETECT, 0.1);
	info("Found device in %s mode\n", client->mode->string);

	if (client->mode->index == MODE_WTF) {
		unsigned int cpid = 0;

		if (dfu_client_new(client) != 0) {
			error("ERROR: Could not open device in WTF mode\n");
			return -1;
		}
		if ((dfu_get_cpid(client, &cpid) < 0) || (cpid == 0)) { 
			error("ERROR: Could not get CPID for WTF mode device\n");
			dfu_client_free(client);
			return -1;
		}

		char wtfname[256];
		sprintf(wtfname, "Firmware/dfu/WTF.s5l%04xxall.RELEASE.dfu", cpid);
		unsigned char* wtftmp = NULL;
		unsigned int wtfsize = 0;

		// Prefer to get WTF file from the restore IPSW
		ipsw_extract_to_memory(client->ipsw, wtfname, &wtftmp, &wtfsize);
		if (!wtftmp) {
			// Download WTF IPSW
			char* s_wtfurl = NULL;
			plist_t wtfurl = plist_access_path(client->version_data, 7, "MobileDeviceSoftwareVersionsByVersion", "5", "RecoverySoftwareVersions", "WTF", "304218112", "5", "FirmwareURL");
			if (wtfurl && (plist_get_node_type(wtfurl) == PLIST_STRING)) {
				plist_get_string_val(wtfurl, &s_wtfurl);
			}
			if (!s_wtfurl) {
				info("Using hardcoded x12220000_5_Recovery.ipsw URL\n");
				s_wtfurl = strdup("http://appldnld.apple.com.edgesuite.net/content.info.apple.com/iPhone/061-6618.20090617.Xse7Y/x12220000_5_Recovery.ipsw");
			}

			// make a local file name
			char* fnpart = strrchr(s_wtfurl, '/');
			if (!fnpart) {
				fnpart = "x12220000_5_Recovery.ipsw";
			} else {
				fnpart++;
			}
			struct stat fst;
			char wtfipsw[1024];
			if (client->cache_dir) {
				if (stat(client->cache_dir, &fst) < 0) {
					mkdir_with_parents(client->cache_dir, 0755);
				}
				strcpy(wtfipsw, client->cache_dir);
				strcat(wtfipsw, "/");
				strcat(wtfipsw, fnpart);
			} else {
				strcpy(wtfipsw, fnpart);
			}
			if (stat(wtfipsw, &fst) != 0) {
				download_to_file(s_wtfurl, wtfipsw, 0);
			}

			ipsw_extract_to_memory(wtfipsw, wtfname, &wtftmp, &wtfsize);
			if (!wtftmp) {
				error("ERROR: Could not extract WTF\n");
			}
		}

		if (wtftmp) {
			if (dfu_send_buffer(client, wtftmp, wtfsize) != 0) {
				error("ERROR: Could not send WTF...\n");
			}
		}
		dfu_client_free(client);

		sleep(1);

		free(wtftmp);
		client->mode = &idevicerestore_modes[MODE_DFU];
	}

	// discover the device type
	if (check_product_type(client) == NULL || client->device == NULL) {
		error("ERROR: Unable to discover device type\n");
		return -1;
	}
	idevicerestore_progress(client, RESTORE_STEP_DETECT, 0.2);
	info("Identified device as %s\n", client->device->product_type);

	if ((client->flags & FLAG_PWN) && (client->mode->index != MODE_DFU)) {
		error("ERROR: you need to put your device into DFU mode to pwn it.\n");
		return -1;
	}

	if (client->flags & FLAG_PWN) {
		recovery_client_free(client);

		info("connecting to DFU\n");
		if (dfu_client_new(client) < 0) {
			return -1;
		}
		info("exploiting with limera1n...\n");
		// TODO: check for non-limera1n device and fail
		if (limera1n_exploit(client->device, &client->dfu->client) != 0) {
			error("ERROR: limera1n exploit failed\n");
			dfu_client_free(client);
			return -1;
		}
		dfu_client_free(client);
		info("Device should be in pwned DFU state now.\n");

		return 0;
	}

	if (client->flags & FLAG_LATEST) {
		char* ipsw = NULL;
		int res = ipsw_download_latest_fw(client->version_data, client->device->product_type, "cache", &ipsw);
		if (res != 0) {
			if (ipsw) {
				free(ipsw);
			}
			return res;
		} else {
			client->ipsw = ipsw;
		}
	}
	idevicerestore_progress(client, RESTORE_STEP_DETECT, 0.6);

	if (client->flags & FLAG_NOACTION) {
		return 0;
	}

	if (client->mode->index == MODE_RESTORE) {
		if (restore_reboot(client) < 0) {
			error("ERROR: Unable to exit restore mode\n");
			return -2;
		}

		// we need to refresh the current mode again
		check_mode(client);
		info("Found device in %s mode\n", client->mode->string);
	}

	// verify if ipsw file exists
	if (access(client->ipsw, F_OK) < 0) {
		error("ERROR: Firmware file %s does not exist.\n", client->ipsw);
		return -1;
	}

	// extract buildmanifest
	plist_t buildmanifest = NULL;
	if (client->flags & FLAG_CUSTOM) {
		info("Extracting Restore.plist from IPSW\n");
		if (ipsw_extract_restore_plist(client->ipsw, &buildmanifest) < 0) {
			error("ERROR: Unable to extract Restore.plist from %s. Firmware file might be corrupt.\n", client->ipsw);
			return -1;
		}
	} else {
		info("Extracting BuildManifest from IPSW\n");
		if (ipsw_extract_build_manifest(client->ipsw, &buildmanifest, &tss_enabled) < 0) {
			error("ERROR: Unable to extract BuildManifest from %s. Firmware file might be corrupt.\n", client->ipsw);
			return -1;
		}
	}
	idevicerestore_progress(client, RESTORE_STEP_DETECT, 0.8);

	/* check if device type is supported by the given build manifest */
	if (build_manifest_check_compatibility(buildmanifest, client->device->product_type) < 0) {
		error("ERROR: Could not make sure this firmware is suitable for the current device. Refusing to continue.\n");
		return -1;
	}

	/* print iOS information from the manifest */
	build_manifest_get_version_information(buildmanifest, client);

	info("Product Version: %s\n", client->version);
	info("Product Build: %s Major: %d\n", client->build, client->build_major);

	if (client->flags & FLAG_CUSTOM) {
		/* prevent signing custom firmware */
		tss_enabled = 0;
		info("Custom firmware requested. Disabled TSS request.\n");
	}

	// choose whether this is an upgrade or a restore (default to upgrade)
	client->tss = NULL;
	plist_t build_identity = NULL;
	if (client->flags & FLAG_CUSTOM) {
		build_identity = plist_new_dict();
		{
			plist_t node;
			plist_t comp;
			plist_t inf;
			plist_t manifest;

			char tmpstr[256];
			char p_all_flash[128];
			char lcmodel[8];
			strcpy(lcmodel, client->device->hardware_model);
			int x = 0;
			while (lcmodel[x]) {
				lcmodel[x] = tolower(lcmodel[x]);
				x++;
			}

			sprintf(p_all_flash, "Firmware/all_flash/all_flash.%s.%s", lcmodel, "production");
			strcpy(tmpstr, p_all_flash);
			strcat(tmpstr, "/manifest");

			// get all_flash file manifest
			char *files[16];
			char *fmanifest = NULL;
			uint32_t msize = 0;
			if (ipsw_extract_to_memory(client->ipsw, tmpstr, (unsigned char**)&fmanifest, &msize) < 0) {
				error("ERROR: could not extract %s from IPSW\n", tmpstr);
				return -1;
			}

			char *tok = strtok(fmanifest, "\r\n");
			int fc = 0;
			while (tok) {
				files[fc++] = strdup(tok);
				if (fc >= 16) {
					break;
				}
				tok = strtok(NULL, "\r\n");
			}
			free(fmanifest);

			manifest = plist_new_dict();

			for (x = 0; x < fc; x++) {
				inf = plist_new_dict();
				strcpy(tmpstr, p_all_flash);
				strcat(tmpstr, "/");
				strcat(tmpstr, files[x]);
				plist_dict_insert_item(inf, "Path", plist_new_string(tmpstr));
				comp = plist_new_dict();
				plist_dict_insert_item(comp, "Info", inf);
				const char* compname = get_component_name(files[x]);
				if (compname) {
					plist_dict_insert_item(manifest, compname, comp);
					if (!strncmp(files[x], "DeviceTree", 10)) {
						plist_dict_insert_item(manifest, "RestoreDeviceTree", plist_copy(comp));
					}
				} else {
					error("WARNING: unhandled component %s\n", files[x]);
					plist_free(comp);
				}
				free(files[x]);
				files[x] = NULL;
			}

			// add iBSS
			sprintf(tmpstr, "Firmware/dfu/iBSS.%s.%s.dfu", lcmodel, "RELEASE");
			inf = plist_new_dict();
			plist_dict_insert_item(inf, "Path", plist_new_string(tmpstr));
			comp = plist_new_dict();
			plist_dict_insert_item(comp, "Info", inf);
			plist_dict_insert_item(manifest, "iBSS", comp);

			// add iBEC
			sprintf(tmpstr, "Firmware/dfu/iBEC.%s.%s.dfu", lcmodel, "RELEASE");
			inf = plist_new_dict();
			plist_dict_insert_item(inf, "Path", plist_new_string(tmpstr));
			comp = plist_new_dict();
			plist_dict_insert_item(comp, "Info", inf);
			plist_dict_insert_item(manifest, "iBEC", comp);

			// add kernel cache
			plist_t kdict = NULL;

			node = plist_dict_get_item(buildmanifest, "KernelCachesByTarget");
			if (node && (plist_get_node_type(node) == PLIST_DICT)) {
				char tt[4];
				strncpy(tt, lcmodel, 3);
				tt[3] = 0;
				kdict = plist_dict_get_item(node, tt);
			} else {
				// Populated in older iOS IPSWs
				kdict = plist_dict_get_item(buildmanifest, "RestoreKernelCaches");
			}
			if (kdict && (plist_get_node_type(kdict) == PLIST_DICT)) {
				plist_t kc = plist_dict_get_item(kdict, "Release");
				if (kc && (plist_get_node_type(kc) == PLIST_STRING)) {
					inf = plist_new_dict();
					plist_dict_insert_item(inf, "Path", plist_copy(kc));
					comp = plist_new_dict();
					plist_dict_insert_item(comp, "Info", inf);
					plist_dict_insert_item(manifest, "KernelCache", comp);
					plist_dict_insert_item(manifest, "RestoreKernelCache", plist_copy(comp));
				}
			}

			// add ramdisk
			node = plist_dict_get_item(buildmanifest, "RestoreRamDisks");
			if (node && (plist_get_node_type(node) == PLIST_DICT)) {
				plist_t rd = plist_dict_get_item(node, (client->flags & FLAG_ERASE) ? "User" : "Update");
				// if no "Update" ram disk entry is found try "User" ram disk instead
				if (!rd && !(client->flags & FLAG_ERASE)) {
					rd = plist_dict_get_item(node, "User");
					// also, set the ERASE flag since we actually change the restore variant
					client->flags |= FLAG_ERASE;
				}
				if (rd && (plist_get_node_type(rd) == PLIST_STRING)) {
					inf = plist_new_dict();
					plist_dict_insert_item(inf, "Path", plist_copy(rd));
					comp = plist_new_dict();
					plist_dict_insert_item(comp, "Info", inf);
					plist_dict_insert_item(manifest, "RestoreRamDisk", comp);
				}
			}

			// add OS filesystem
			node = plist_dict_get_item(buildmanifest, "SystemRestoreImages");
			if (!node) {
				error("ERROR: missing SystemRestoreImages in Restore.plist\n");
			}
			plist_t os = plist_dict_get_item(node, "User");
			if (!os) {
				error("ERROR: missing filesystem in Restore.plist\n");
			} else {
				inf = plist_new_dict();
				plist_dict_insert_item(inf, "Path", plist_copy(os));
				comp = plist_new_dict();
				plist_dict_insert_item(comp, "Info", inf);
				plist_dict_insert_item(manifest, "OS", comp);
			}

			// add info
			inf = plist_new_dict();
			plist_dict_insert_item(inf, "RestoreBehavior", plist_new_string((client->flags & FLAG_ERASE) ? "Erase" : "Update"));
			plist_dict_insert_item(inf, "Variant", plist_new_string((client->flags & FLAG_ERASE) ? "Customer Erase Install (IPSW)" : "Customer Upgrade Install (IPSW)"));
			plist_dict_insert_item(build_identity, "Info", inf);

			// finally add manifest
			plist_dict_insert_item(build_identity, "Manifest", manifest);
		}
	} else if (client->flags & FLAG_ERASE) {
		build_identity = build_manifest_get_build_identity(buildmanifest, 0);
		if (build_identity == NULL) {
			error("ERROR: Unable to find any build identities\n");
			plist_free(buildmanifest);
			return -1;
		}
	} else {
		// loop through all build identities in the build manifest
		// and list the valid ones
		int i = 0;
		int valid_builds = 0;
		int build_count = build_manifest_get_identity_count(buildmanifest);
		for (i = 0; i < build_count; i++) {
			build_identity = build_manifest_get_build_identity(buildmanifest, i);
			valid_builds++;
		}
	}

	/* print information about current build identity */
	build_identity_print_information(build_identity);

	idevicerestore_progress(client, RESTORE_STEP_PREPARE, 0.0);
	/* retrieve shsh blobs if required */
	if (tss_enabled) {
		debug("Getting device's ECID for TSS request\n");
		/* fetch the device's ECID for the TSS request */
		if (get_ecid(client, &client->ecid) < 0) {
			error("ERROR: Unable to find device ECID\n");
			return -1;
		}
		info("Found ECID " FMT_qu "\n", (long long unsigned int)client->ecid);

		if (client->build_major > 8) {
			unsigned char* nonce = NULL;
			int nonce_size = 0;
			int nonce_changed = 0;
			if (get_nonce(client, &nonce, &nonce_size) < 0) {
				/* the first nonce request with older firmware releases can fail and it's OK */
				info("NOTE: Unable to get nonce from device\n");
			}

			if (!client->nonce || (nonce_size != client->nonce_size) || (memcmp(nonce, client->nonce, nonce_size) != 0)) {
				nonce_changed = 1;
				if (client->nonce) {
					free(client->nonce);
				}
				client->nonce = nonce;
				client->nonce_size = nonce_size;
			} else {
				free(nonce);
			}
		}

		if (get_shsh_blobs(client, client->ecid, client->nonce, client->nonce_size, build_identity, &client->tss) < 0) {
			error("ERROR: Unable to get SHSH blobs for this device\n");
			return -1;
		}
	}

	if (client->flags & FLAG_SHSHONLY) {
		if (!tss_enabled) {
			info("This device does not require a TSS record");
			return 0;
		}
		if (!client->tss) {
			error("ERROR: could not fetch TSS record");
			plist_free(buildmanifest);
			return -1;
		} else {
			char *bin = NULL;
			uint32_t blen = 0;
			plist_to_bin(client->tss, &bin, &blen);
			if (bin) {
				char zfn[1024];
				if (client->cache_dir) {
					strcpy(zfn, client->cache_dir);
					strcat(zfn, "/shsh");
				} else {
					strcpy(zfn, "shsh");
				}
				mkdir_with_parents(zfn, 0755);
				sprintf(zfn+strlen(zfn), "/" FMT_qu "-%s-%s.shsh", (long long int)client->ecid, client->device->product_type, client->version);
				struct stat fst;
				if (stat(zfn, &fst) != 0) {
					gzFile zf = gzopen(zfn, "wb");
					gzwrite(zf, bin, blen);
					gzclose(zf);
					info("SHSH saved to '%s'\n", zfn);
				} else {
					info("SHSH '%s' already present.\n", zfn);
				}
				free(bin);
			} else {
				error("ERROR: could not get TSS record data\n");
			}
			plist_free(client->tss);
			plist_free(buildmanifest);
			return 0;
		}
	}

	/* verify if we have tss records if required */
	if ((tss_enabled) && (client->tss == NULL)) {
		error("ERROR: Unable to proceed without a TSS record.\n");
		plist_free(buildmanifest);
		return -1;
	}

	if ((tss_enabled) && client->tss) {
		/* fix empty dicts */
		fixup_tss(client->tss);
	}
	idevicerestore_progress(client, RESTORE_STEP_PREPARE, 0.1);

	// if the device is in normal mode, place device into recovery mode
	if (client->mode->index == MODE_NORMAL) {
		info("Entering recovery mode...\n");
		if (normal_enter_recovery(client) < 0) {
			error("ERROR: Unable to place device into recovery mode from %s mode\n", client->mode->string);
			if (client->tss)
				plist_free(client->tss);
			plist_free(buildmanifest);
			return -5;
		}
	}

	// Get filesystem name from build identity
	char* fsname = NULL;
	if (build_identity_get_component_path(build_identity, "OS", &fsname) < 0) {
		error("ERROR: Unable get path for filesystem component\n");
		return -1;
	}

	// check if we already have an extracted filesystem
	int delete_fs = 0;
	char* filesystem = NULL;
	struct stat st;
	memset(&st, '\0', sizeof(struct stat));
	char tmpf[1024];
	if (client->cache_dir) {
		if (stat(client->cache_dir, &st) < 0) {
			mkdir_with_parents(client->cache_dir, 0755);
		}
		strcpy(tmpf, client->cache_dir);
		strcat(tmpf, "/");
		char *ipswtmp = strdup(client->ipsw);
		strcat(tmpf, basename(ipswtmp));
		free(ipswtmp);
	} else {
		strcpy(tmpf, client->ipsw);
	}
	char* p = strrchr((const char*)tmpf, '.');
	if (p) {
		*p = '\0';
	}

	if (stat(tmpf, &st) < 0) {
		__mkdir(tmpf, 0755);
	}
	strcat(tmpf, "/");
	strcat(tmpf, fsname);

	memset(&st, '\0', sizeof(struct stat));
	if (stat(tmpf, &st) == 0) {
		off_t fssize = 0;
		ipsw_get_file_size(client->ipsw, fsname, &fssize);
		if ((fssize > 0) && (st.st_size == fssize)) {
			info("Using cached filesystem from '%s'\n", tmpf);
			filesystem = strdup(tmpf);
		}
	}

	if (!filesystem) {
		char extfn[1024];
		strcpy(extfn, tmpf);
		strcat(extfn, ".extract");
		char lockfn[1024];
		strcpy(lockfn, tmpf);
		strcat(lockfn, ".lock");
		lock_info_t li;

		lock_file(lockfn, &li);
		FILE* extf = NULL;
		if (access(extfn, F_OK) != 0) {
			extf = fopen(extfn, "w");
		}
		unlock_file(&li);
		if (!extf) {
			// use temp filename
			filesystem = tempnam(NULL, "ipsw_");
			if (!filesystem) {
				error("WARNING: Could not get temporary filename, using '%s' in current directory\n", fsname);
				filesystem = strdup(fsname);
			}
			delete_fs = 1;
		} else {
			// use <fsname>.extract as filename
			filesystem = strdup(extfn);
			fclose(extf);
		}
		remove(lockfn);

		// Extract filesystem from IPSW
		info("Extracting filesystem from IPSW\n");
		if (ipsw_extract_to_file(client->ipsw, fsname, filesystem) < 0) {
			error("ERROR: Unable to extract filesystem from IPSW\n");
			if (client->tss)
				plist_free(client->tss);
			plist_free(buildmanifest);
			return -1;
		}

		if (strstr(filesystem, ".extract")) {
			// rename <fsname>.extract to <fsname>
			rename(filesystem, tmpf);
			free(filesystem);
			filesystem = strdup(tmpf); 
		}
	}

	idevicerestore_progress(client, RESTORE_STEP_PREPARE, 0.3);

	// if the device is in DFU mode, place device into recovery mode
	if (client->mode->index == MODE_DFU) {
		recovery_client_free(client);
		if ((client->flags & FLAG_CUSTOM) && limera1n_is_supported(client->device)) {
			info("connecting to DFU\n");
			if (dfu_client_new(client) < 0) {
				if (delete_fs && filesystem)
					unlink(filesystem);
				return -1;
			}
			info("exploiting with limera1n\n");
			// TODO: check for non-limera1n device and fail
			if (limera1n_exploit(client->device, &client->dfu->client) != 0) {
				error("ERROR: limera1n exploit failed\n");
				dfu_client_free(client);
				if (delete_fs && filesystem)
					unlink(filesystem);
				return -1;
			}
			dfu_client_free(client);
			info("exploited\n");
		}
		if (dfu_enter_recovery(client, build_identity) < 0) {
			error("ERROR: Unable to place device into recovery mode from %s mode\n", client->mode->string);
			plist_free(buildmanifest);
			if (client->tss)
				plist_free(client->tss);
			if (delete_fs && filesystem)
				unlink(filesystem);
			return -2;
		}
	}

	if (client->mode->index == MODE_DFU) {
		client->mode = &idevicerestore_modes[MODE_RECOVERY];
	} else {
		if ((client->build_major > 8) && !(client->flags & FLAG_CUSTOM)) {
			/* send ApTicket */
			if (recovery_send_ticket(client) < 0) {
				error("WARNING: Unable to send APTicket\n");
			}
		}

		/* now we load the iBEC */
		if (recovery_send_ibec(client, build_identity) < 0) {
			error("ERROR: Unable to send iBEC\n");
			if (delete_fs && filesystem)
				unlink(filesystem);
			return -2;
		}
		recovery_client_free(client);
	
		/* this must be long enough to allow the device to run the iBEC */
		/* FIXME: Probably better to detect if the device is back then */
		sleep(7);
	}
	idevicerestore_progress(client, RESTORE_STEP_PREPARE, 0.5);

	if (client->build_major > 8) {
		// we need another tss request with nonce.
		unsigned char* nonce = NULL;
		int nonce_size = 0;
		int nonce_changed = 0;
		if (get_nonce(client, &nonce, &nonce_size) < 0) {
			error("ERROR: Unable to get nonce from device!\n");
			recovery_send_reset(client);
			if (delete_fs && filesystem)
				unlink(filesystem);
			return -2;
		}

		if (!client->nonce || (nonce_size != client->nonce_size) || (memcmp(nonce, client->nonce, nonce_size) != 0)) {
			nonce_changed = 1;
			if (client->nonce) {
				free(client->nonce);
			}
			client->nonce = nonce;
			client->nonce_size = nonce_size;
		} else {
			free(nonce);
		}

		if (nonce_changed && !(client->flags & FLAG_CUSTOM)) {
			// Welcome iOS5. We have to re-request the TSS with our nonce.
			plist_free(client->tss);
			if (get_shsh_blobs(client, client->ecid, client->nonce, client->nonce_size, build_identity, &client->tss) < 0) {
				error("ERROR: Unable to get SHSH blobs for this device\n");
				if (delete_fs && filesystem)
					unlink(filesystem);
				return -1;
			}
			if (!client->tss) {
				error("ERROR: can't continue without TSS\n");
				if (delete_fs && filesystem)
					unlink(filesystem);
				return -1;
			}
			fixup_tss(client->tss);
		}
	}
	idevicerestore_progress(client, RESTORE_STEP_PREPARE, 0.7);

	// now finally do the magic to put the device into restore mode
	if (client->mode->index == MODE_RECOVERY) {
		if (client->srnm == NULL) {
			error("ERROR: could not retrieve device serial number. Can't continue.\n");
			if (delete_fs && filesystem)
				unlink(filesystem);
			return -1;
		}
		if (recovery_enter_restore(client, build_identity) < 0) {
			error("ERROR: Unable to place device into restore mode\n");
			plist_free(buildmanifest);
			if (client->tss)
				plist_free(client->tss);
			if (delete_fs && filesystem)
				unlink(filesystem);
			return -2;
		}
		recovery_client_free(client);
	}
	idevicerestore_progress(client, RESTORE_STEP_PREPARE, 0.9);

	// device is finally in restore mode, let's do this
	if (client->mode->index == MODE_RESTORE) {
		info("About to restore device... \n");
		result = restore_device(client, build_identity, filesystem);
		if (result < 0) {
			error("ERROR: Unable to restore device\n");
			if (delete_fs && filesystem)
				unlink(filesystem);
			return result;
		}
	}

	info("Cleaning up...\n");
	if (delete_fs && filesystem)
		unlink(filesystem);

	/* special handling of AppleTVs */
	if (strncmp(client->device->product_type, "AppleTV", 7) == 0) {
		if (recovery_client_new(client) == 0) {
			if (recovery_set_autoboot(client, 1) == 0) {
				recovery_send_reset(client);
			} else {
				error("Setting auto-boot failed?!\n");
			}
		} else {
			error("Could not connect to device in recovery mode.\n");
		}
	}

	info("DONE\n");

	if (result == 0) {
		idevicerestore_progress(client, RESTORE_NUM_STEPS-1, 1.0);
	}

	return result;
}