summaryrefslogtreecommitdiffstats
path: root/src/dfu.c
blob: 993692dd5160dcb35dad053c08e3cb40941804e5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
/*
 * dfu.c
 * Functions for handling idevices in DFU mode
 *
 * Copyright (c) 2010-2013 Martin Szulecki. All Rights Reserved.
 * Copyright (c) 2012-2015 Nikias Bassen. All Rights Reserved.
 * 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 <libirecovery.h>

#include "dfu.h"
#include "tss.h"
#include "recovery.h"
#include "idevicerestore.h"
#include "common.h"

int dfu_progress_callback(irecv_client_t client, const irecv_event_t* event) {
	if (event->type == IRECV_PROGRESS) {
		print_progress_bar(event->progress);
	}
	return 0;
}

int dfu_client_new(struct idevicerestore_client_t* client) {
	int i = 0;
	int attempts = 10;
	irecv_client_t dfu = NULL;
	irecv_error_t dfu_error = IRECV_E_UNKNOWN_ERROR;

	if (client->dfu == NULL) {
		client->dfu = (struct dfu_client_t*)malloc(sizeof(struct dfu_client_t));
		memset(client->dfu, 0, sizeof(struct dfu_client_t));
		if (client->dfu == NULL) {
			error("ERROR: Out of memory\n");
			return -1;
		}
	}

	for (i = 1; i <= attempts; i++) {
		dfu_error = irecv_open_with_ecid(&dfu, client->ecid);
		if (dfu_error == IRECV_E_SUCCESS) {
			break;
		}

		if (i >= attempts) {
			error("ERROR: Unable to connect to device in DFU mode\n");
			return -1;
		}

		sleep(1);
		debug("Retrying connection...\n");
	}

	irecv_event_subscribe(dfu, IRECV_PROGRESS, &dfu_progress_callback, NULL);
	client->dfu->client = dfu;
	return 0;
}

void dfu_client_free(struct idevicerestore_client_t* client) {
	if(client != NULL) {
		if (client->dfu != NULL) {
			if(client->dfu->client != NULL) {
				irecv_close(client->dfu->client);
				client->dfu->client = NULL;
			}
			free(client->dfu);
		}
		client->dfu = NULL;
	}
}

int dfu_check_mode(struct idevicerestore_client_t* client, int* mode) {
	irecv_client_t dfu = NULL;
	irecv_error_t dfu_error = IRECV_E_SUCCESS;
	int probe_mode = -1;

	irecv_init();
	dfu_error = irecv_open_with_ecid(&dfu, client->ecid);
	if (dfu_error != IRECV_E_SUCCESS) {
		return -1;
	}

	irecv_get_mode(dfu, &probe_mode);

	if ((probe_mode != IRECV_K_DFU_MODE) && (probe_mode != IRECV_K_WTF_MODE)) {
		irecv_close(dfu);
		return -1;
	}

	*mode = (probe_mode == IRECV_K_WTF_MODE) ? MODE_WTF : MODE_DFU;

	irecv_close(dfu);

	return 0;
}

const char* dfu_check_hardware_model(struct idevicerestore_client_t* client) {
	irecv_client_t dfu = NULL;
	irecv_error_t dfu_error = IRECV_E_SUCCESS;
	irecv_device_t device = NULL;

	irecv_init();
	dfu_error = irecv_open_with_ecid(&dfu, client->ecid);
	if (dfu_error != IRECV_E_SUCCESS) {
		return NULL;
	}

	dfu_error = irecv_devices_get_device_by_client(dfu, &device);
	if (dfu_error != IRECV_E_SUCCESS) {
		return NULL;
	}

	irecv_close(dfu);

	return device->hardware_model;
}

int dfu_send_buffer(struct idevicerestore_client_t* client, unsigned char* buffer, unsigned int size)
{
	irecv_error_t err = 0;

	info("Sending data (%d bytes)...\n", size);

	err = irecv_send_buffer(client->dfu->client, buffer, size, 1);
	if (err != IRECV_E_SUCCESS) {
		error("ERROR: Unable to send data: %s\n", irecv_strerror(err));
		return -1;
	}

	return 0;
}

int dfu_send_component(struct idevicerestore_client_t* client, plist_t build_identity, const char* component) {
	uint32_t size = 0;
	unsigned char* data = NULL;
	char* path = NULL;
	irecv_error_t err = 0;
	int flag = 1;

	if (client->tss) {
		if (tss_response_get_path_by_entry(client->tss, component, &path) < 0) {
			debug("NOTE: No path for component %s in TSS, will fetch from build_identity\n", component);
		}
	}
	if (!path) {
		if (build_identity_get_component_path(build_identity, component, &path) < 0) {
			error("ERROR: Unable to get path for component '%s'\n", component);
			if (path)
				free(path);
			return -1;
		}
	}

	unsigned char* component_data = NULL;
	unsigned int component_size = 0;

	if (extract_component(client->ipsw, path, &component_data, &component_size) < 0) {
		error("ERROR: Unable to extract component: %s\n", component);
		free(path);
		return -1;
	}

	if (personalize_component(component, component_data, component_size, client->tss, &data, &size) < 0) {
		error("ERROR: Unable to get personalized component: %s\n", component);
		free(component_data);
		free(path);
		return -1;
	}
	free(component_data);
	component_data = NULL;

	if (!client->image4supported && (client->build_major > 8) && !(client->flags & FLAG_CUSTOM) && (strcmp(component, "iBEC") == 0)) {
		unsigned char* ticket = NULL;
		unsigned int tsize = 0;
		if (tss_response_get_ap_ticket(client->tss, &ticket, &tsize) < 0) {
			error("ERROR: Unable to get ApTicket from TSS request\n");
			return -1;
		}
		uint32_t fillsize = 0;
		if ((tsize % 0x40) != 0) {
			fillsize = 0x40 - (tsize % 0x40);
		}
		debug("ticket size = %d\nfillsize = %d\n", tsize, fillsize);
		unsigned char* newdata = (unsigned char*)malloc(tsize + fillsize + size);
		memcpy(newdata, ticket, tsize);
		memset(newdata+tsize, '\xFF', fillsize);
		memcpy(newdata+tsize+fillsize, data, size);
		free(data);
		data = newdata;
		size += tsize;
		size += fillsize;
		flag = 1;
	}

	info("Sending %s (%d bytes)...\n", component, size);

	// FIXME: Did I do this right????
	err = irecv_send_buffer(client->dfu->client, data, size, flag);
	free(path);
	if (err != IRECV_E_SUCCESS) {
		error("ERROR: Unable to send %s component: %s\n", component, irecv_strerror(err));
		free(data);
		return -1;
	}

	free(data);
	return 0;
}

int dfu_get_cpid(struct idevicerestore_client_t* client, unsigned int* cpid) {
	if(client->dfu == NULL) {
		if (dfu_client_new(client) < 0) {
			return -1;
		}
	}

	const struct irecv_device_info *device_info = irecv_get_device_info(client->dfu->client);
	if (!device_info) {
		return -1;
	}

	*cpid = device_info->cpid;

	return 0;
}

int dfu_get_ecid(struct idevicerestore_client_t* client, uint64_t* ecid) {
	if(client->dfu == NULL) {
		if (dfu_client_new(client) < 0) {
			return -1;
		}
	}

	const struct irecv_device_info *device_info = irecv_get_device_info(client->dfu->client);
	if (!device_info) {
		return -1;
	}

	*ecid = device_info->ecid;

	return 0;
}

int dfu_is_image4_supported(struct idevicerestore_client_t* client)
{
	if(client->dfu == NULL) {
		if (dfu_client_new(client) < 0) {
			return 0;
		}
	}

	const struct irecv_device_info *device_info = irecv_get_device_info(client->dfu->client);
	if (!device_info) {
		return 0;
	}

	return (device_info->ibfl & IBOOT_FLAG_IMAGE4_AWARE);
}

int dfu_get_ap_nonce(struct idevicerestore_client_t* client, unsigned char** nonce, int* nonce_size) {
	if(client->dfu == NULL) {
		if (dfu_client_new(client) < 0) {
			return -1;
		}
	}

	const struct irecv_device_info *device_info = irecv_get_device_info(client->dfu->client);
	if (!device_info) {
		return -1;
	}

	if (device_info->ap_nonce && device_info->ap_nonce_size > 0) {
		*nonce = (unsigned char*)malloc(device_info->ap_nonce_size);
		if (!*nonce) {
			return -1;
		}
		*nonce_size = device_info->ap_nonce_size;
		memcpy(*nonce, device_info->ap_nonce, *nonce_size);
	}

	return 0;
}

int dfu_get_sep_nonce(struct idevicerestore_client_t* client, unsigned char** nonce, int* nonce_size) {
	if(client->dfu == NULL) {
		if (dfu_client_new(client) < 0) {
			return -1;
		}
	}

	const struct irecv_device_info *device_info = irecv_get_device_info(client->dfu->client);
	if (!device_info) {
		return -1;
	}

	if (device_info->sep_nonce && device_info->sep_nonce_size > 0) {
		*nonce = (unsigned char*)malloc(device_info->sep_nonce_size);
		if (!*nonce) {
			return -1;
		}
		*nonce_size = device_info->sep_nonce_size;
		memcpy(*nonce, device_info->sep_nonce, *nonce_size);
	}

	return 0;
}

int dfu_enter_recovery(struct idevicerestore_client_t* client, plist_t build_identity) {
	irecv_error_t dfu_error = IRECV_E_SUCCESS;
	int mode = 0;

	if (dfu_client_new(client) < 0) {
		error("ERROR: Unable to connect to DFU device\n");
		return -1;
	}

	irecv_get_mode(client->dfu->client, &mode);

	if (mode != IRECV_K_DFU_MODE) {
		info("NOTE: device is not in DFU mode, assuming recovery mode.\n");
		client->mode = &idevicerestore_modes[MODE_RECOVERY];
		return 0;
	}

	if (dfu_send_component(client, build_identity, "iBSS") < 0) {
		error("ERROR: Unable to send iBSS to device\n");
		irecv_close(client->dfu->client);
		client->dfu->client = NULL;
		return -1;
	}

	if (client->build_major > 8) {
		/* reconnect */
		dfu_client_free(client);
		sleep(2);
		dfu_client_new(client);

		/* get nonce */
		unsigned char* nonce = NULL;
		int nonce_size = 0;
		int nonce_changed = 0;
		if (dfu_get_ap_nonce(client, &nonce, &nonce_size) < 0) {
			error("ERROR: Unable to get ApNonce from device!\n");
			return -1;
		}

		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);
		}

		info("Nonce: ");
		int i;
		for (i = 0; i < client->nonce_size; i++) {
			info("%02x ", client->nonce[i]);
		}
		info("\n");

		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_tss_response(client, build_identity, &client->tss) < 0) {
				error("ERROR: Unable to get SHSH blobs for this device\n");
				return -1;
			}
			if (!client->tss) {
				error("ERROR: can't continue without TSS\n");
				return -1;
			}
			fixup_tss(client->tss);
		}

		if (irecv_usb_set_configuration(client->dfu->client, 1) < 0) {
			error("ERROR: set configuration failed\n");
		}

		/* send iBEC */
		if (dfu_send_component(client, build_identity, "iBEC") < 0) {
			error("ERROR: Unable to send iBEC to device\n");
			irecv_close(client->dfu->client);
			client->dfu->client = NULL;
			return -1;
		}
	}

	dfu_client_free(client);

	sleep(7);

	// Reconnect to device, but this time make sure we're not still in DFU mode
	if (recovery_client_new(client) < 0) {
		error("ERROR: Unable to connect to recovery device\n");
		if (client->recovery->client) {
			irecv_close(client->recovery->client);
			client->recovery->client = NULL;
		}
		return -1;
	}

	irecv_get_mode(client->recovery->client, &mode);

	if (mode == IRECV_K_DFU_MODE) {
		error("ERROR: Unable to connect to recovery device\n");
		if (client->recovery->client) {
			irecv_close(client->recovery->client);
			client->recovery->client = NULL;
		}
		return -1;
	}

	return 0;
}