summaryrefslogblamecommitdiffstats
path: root/twinstallorig.cpp
blob: 60d76a5ea1494f3b09269f47fcb09a181e7c9094 (plain) (tree)
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







































































































































































































































































































































































































































                                                                                                                                     
/*
	Copyright 2012 to 2016 bigbiff/Dees_Troy TeamWin
	This file is part of TWRP/TeamWin Recovery Project.

	TWRP is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	TWRP 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 General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with TWRP.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>

#include <string.h>
#include <stdio.h>

#include "twcommon.h"
#include "mtdutils/mounts.h"
#include "mtdutils/mtdutils.h"
#include "minzip/SysUtil.h"
#include "minzip/Zip.h"
#ifdef USE_OLD_VERIFIER
#include "verifier24/verifier.h"
#else
#include "verifier.h"
#endif
#include "variables.h"
#include "data.hpp"
#include "partitions.hpp"
#include "twrpDigestDriver.hpp"
#include "twrpDigest/twrpDigest.hpp"
#include "twrpDigest/twrpMD5.hpp"
#include "twrp-functions.hpp"
#include "gui/gui.hpp"
#include "gui/pages.hpp"
#include "legacy_property_service.h"
#include "twinstall.h"
#include "installcommand.h"
extern "C" {
	#include "gui/gui.h"
}

#define AB_OTA "payload_properties.txt"

static const char* properties_path = "/dev/__properties__";
static const char* properties_path_renamed = "/dev/__properties_kk__";
static bool legacy_props_env_initd = false;
static bool legacy_props_path_modified = false;

enum zip_type {
	UNKNOWN_ZIP_TYPE = 0,
	UPDATE_BINARY_ZIP_TYPE,
	AB_OTA_ZIP_TYPE,
	TWRP_THEME_ZIP_TYPE
};

// to support pre-KitKat update-binaries that expect properties in the legacy format
static int switch_to_legacy_properties()
{
	if (!legacy_props_env_initd) {
		if (legacy_properties_init() != 0)
			return -1;

		char tmp[32];
		int propfd, propsz;
		legacy_get_property_workspace(&propfd, &propsz);
		sprintf(tmp, "%d,%d", dup(propfd), propsz);
		setenv("ANDROID_PROPERTY_WORKSPACE", tmp, 1);
		legacy_props_env_initd = true;
	}

	if (TWFunc::Path_Exists(properties_path)) {
		// hide real properties so that the updater uses the envvar to find the legacy format properties
		if (rename(properties_path, properties_path_renamed) != 0) {
			LOGERR("Renaming %s failed: %s\n", properties_path, strerror(errno));
			return -1;
		} else {
			legacy_props_path_modified = true;
		}
	}

	return 0;
}

static int switch_to_new_properties()
{
	if (TWFunc::Path_Exists(properties_path_renamed)) {
		if (rename(properties_path_renamed, properties_path) != 0) {
			LOGERR("Renaming %s failed: %s\n", properties_path_renamed, strerror(errno));
			return -1;
		} else {
			legacy_props_path_modified = false;
		}
	}

	return 0;
}

static int Install_Theme(const char* path, ZipArchive *Zip) {
#ifdef TW_OEM_BUILD // We don't do custom themes in OEM builds
	mzCloseZipArchive(Zip);
	return INSTALL_CORRUPT;
#else
	const ZipEntry* xml_location = mzFindZipEntry(Zip, "ui.xml");

	mzCloseZipArchive(Zip);
	if (xml_location == NULL) {
		return INSTALL_CORRUPT;
	}
	if (!PartitionManager.Mount_Settings_Storage(true))
		return INSTALL_ERROR;
	string theme_path = DataManager::GetSettingsStoragePath();
	theme_path += "/TWRP/theme";
	if (!TWFunc::Path_Exists(theme_path)) {
		if (!TWFunc::Recursive_Mkdir(theme_path)) {
			return INSTALL_ERROR;
		}
	}
	theme_path += "/ui.zip";
	if (TWFunc::copy_file(path, theme_path, 0644) != 0) {
		return INSTALL_ERROR;
	}
	LOGINFO("Installing custom theme '%s' to '%s'\n", path, theme_path.c_str());
	PageManager::RequestReload();
	return INSTALL_SUCCESS;
#endif
}

static int Prepare_Update_Binary(const char *path, ZipArchive *Zip, int* wipe_cache) {
	const ZipEntry* binary_location = mzFindZipEntry(Zip, ASSUMED_UPDATE_BINARY_NAME);
	int binary_fd, ret_val;

	if (binary_location == NULL) {
		return INSTALL_CORRUPT;
	}

	// Delete any existing updater
	if (TWFunc::Path_Exists(TMP_UPDATER_BINARY_PATH) && unlink(TMP_UPDATER_BINARY_PATH) != 0) {
		LOGINFO("Unable to unlink '%s': %s\n", TMP_UPDATER_BINARY_PATH, strerror(errno));
	}

	binary_fd = creat(TMP_UPDATER_BINARY_PATH, 0755);
	if (binary_fd < 0) {
		LOGERR("Could not create file for updater extract in '%s': %s\n", TMP_UPDATER_BINARY_PATH, strerror(errno));
		mzCloseZipArchive(Zip);
		return INSTALL_ERROR;
	}

	ret_val = mzExtractZipEntryToFile(Zip, binary_location, binary_fd);
	close(binary_fd);

	if (!ret_val) {
		mzCloseZipArchive(Zip);
		LOGERR("Could not extract '%s'\n", ASSUMED_UPDATE_BINARY_NAME);
		return INSTALL_ERROR;
	}

	// If exists, extract file_contexts from the zip file
	const ZipEntry* selinx_contexts = mzFindZipEntry(Zip, "file_contexts");
	if (selinx_contexts == NULL) {
		mzCloseZipArchive(Zip);
		LOGINFO("Zip does not contain SELinux file_contexts file in its root.\n");
	} else {
		string output_filename = "/file_contexts";
		LOGINFO("Zip contains SELinux file_contexts file in its root. Extracting to %s\n", output_filename.c_str());
		// Delete any file_contexts
		if (TWFunc::Path_Exists(output_filename) && unlink(output_filename.c_str()) != 0) {
			LOGINFO("Unable to unlink '%s': %s\n", output_filename.c_str(), strerror(errno));
		}

		int file_contexts_fd = creat(output_filename.c_str(), 0644);
		if (file_contexts_fd < 0) {
			LOGERR("Could not extract to '%s': %s\n", output_filename.c_str(), strerror(errno));
			mzCloseZipArchive(Zip);
			return INSTALL_ERROR;
		}

		ret_val = mzExtractZipEntryToFile(Zip, selinx_contexts, file_contexts_fd);
		close(file_contexts_fd);

		if (!ret_val) {
			mzCloseZipArchive(Zip);
			LOGERR("Could not extract '%s'\n", output_filename.c_str());
			return INSTALL_ERROR;
		}
	}
	mzCloseZipArchive(Zip);
	return INSTALL_SUCCESS;
}

static int Run_Update_Binary(const char *path, ZipArchive *Zip, int* wipe_cache, zip_type ztype) {
	int ret_val, pipe_fd[2], status, zip_verify;
	char buffer[1024];
	FILE* child_data;

#ifndef TW_NO_LEGACY_PROPS
	/* Set legacy properties */
	if (switch_to_legacy_properties() != 0) {
		LOGERR("Legacy property environment did not initialize successfully. Properties may not be detected.\n");
	} else {
		LOGINFO("Legacy property environment initialized.\n");
	}
#endif

	pipe(pipe_fd);

	std::vector<std::string> args;
    if (ztype == UPDATE_BINARY_ZIP_TYPE) {
		ret_val = update_binary_command(path, Zip, 0, pipe_fd[1], &args);
    } else if (ztype == AB_OTA_ZIP_TYPE) {
		ret_val = abupdate_binary_command(path, Zip, 0, pipe_fd[1], &args);
	} else {
		LOGERR("Unknown zip type %i\n", ztype);
		ret_val = INSTALL_CORRUPT;
	}
    if (ret_val) {
        close(pipe_fd[0]);
        close(pipe_fd[1]);
        return ret_val;
    }

	// Convert the vector to a NULL-terminated char* array suitable for execv.
	const char* chr_args[args.size() + 1];
	chr_args[args.size()] = NULL;
	for (size_t i = 0; i < args.size(); i++)
		chr_args[i] = args[i].c_str();

	pid_t pid = fork();
	if (pid == 0) {
		close(pipe_fd[0]);
		execve(chr_args[0], const_cast<char**>(chr_args), environ);
		printf("E:Can't execute '%s': %s\n", chr_args[0], strerror(errno));
		_exit(-1);
	}
	close(pipe_fd[1]);

	*wipe_cache = 0;

	DataManager::GetValue(TW_SIGNED_ZIP_VERIFY_VAR, zip_verify);
	child_data = fdopen(pipe_fd[0], "r");
	while (fgets(buffer, sizeof(buffer), child_data) != NULL) {
		char* command = strtok(buffer, " \n");
		if (command == NULL) {
			continue;
		} else if (strcmp(command, "progress") == 0) {
			char* fraction_char = strtok(NULL, " \n");
			char* seconds_char = strtok(NULL, " \n");

			float fraction_float = strtof(fraction_char, NULL);
			int seconds_float = strtol(seconds_char, NULL, 10);

			if (zip_verify)
				DataManager::ShowProgress(fraction_float * (1 - VERIFICATION_PROGRESS_FRACTION), seconds_float);
			else
				DataManager::ShowProgress(fraction_float, seconds_float);
		} else if (strcmp(command, "set_progress") == 0) {
			char* fraction_char = strtok(NULL, " \n");
			float fraction_float = strtof(fraction_char, NULL);
			DataManager::SetProgress(fraction_float);
		} else if (strcmp(command, "ui_print") == 0) {
			char* display_value = strtok(NULL, "\n");
			if (display_value) {
				gui_print("%s", display_value);
			} else {
				gui_print("\n");
			}
		} else if (strcmp(command, "wipe_cache") == 0) {
			*wipe_cache = 1;
		} else if (strcmp(command, "clear_display") == 0) {
			// Do nothing, not supported by TWRP
		} else if (strcmp(command, "log") == 0) {
			printf("%s\n", strtok(NULL, "\n"));
		} else {
			LOGERR("unknown command [%s]\n", command);
		}
	}
	fclose(child_data);

	int waitrc = TWFunc::Wait_For_Child(pid, &status, "Updater");

#ifndef TW_NO_LEGACY_PROPS
	/* Unset legacy properties */
	if (legacy_props_path_modified) {
		if (switch_to_new_properties() != 0) {
			LOGERR("Legacy property environment did not disable successfully. Legacy properties may still be in use.\n");
		} else {
			LOGINFO("Legacy property environment disabled.\n");
		}
	}
#endif

	if (waitrc != 0)
		return INSTALL_ERROR;

	return INSTALL_SUCCESS;
}

extern "C" int TWinstall_zip(const char* path, int* wipe_cache) {
	int ret_val, zip_verify = 1;
	ZipArchive Zip;

	if (strcmp(path, "error") == 0) {
		LOGERR("Failed to get adb sideload file: '%s'\n", path);
		return INSTALL_CORRUPT;
	}

	gui_msg(Msg("installing_zip=Installing zip file '{1}'")(path));
	if (strlen(path) < 9 || strncmp(path, "/sideload", 9) != 0) {
		string digest_str;
		string Full_Filename = path;
		string digest_file = path;
		digest_file += ".md5";

		gui_msg("check_for_digest=Checking for Digest file...");
		if (!TWFunc::Path_Exists(digest_file)) {
			gui_msg("no_digest=Skipping Digest check: no Digest file found");
		}
		else {
			if (TWFunc::read_file(digest_file, digest_str) != 0) {
				LOGERR("Skipping MD5 check: MD5 file unreadable\n");
			}
			else {
				twrpDigest *digest = new twrpMD5();
				if (!twrpDigestDriver::stream_file_to_digest(Full_Filename, digest)) {
					delete digest;
					return INSTALL_CORRUPT;
				}
				string digest_check = digest->return_digest_string();
				if (digest_str == digest_check) {
					gui_msg(Msg("digest_matched=Digest matched for '{1}'.")(path));
				}
				else {
					LOGERR("Aborting zip install: Digest verification failed\n");
					delete digest;
					return INSTALL_CORRUPT;
				}
				delete digest;
			}
		}
	}

#ifndef TW_OEM_BUILD
	DataManager::GetValue(TW_SIGNED_ZIP_VERIFY_VAR, zip_verify);
#endif
	DataManager::SetProgress(0);

	MemMapping map;
	if (sysMapFile(path, &map) != 0) {
		gui_msg(Msg(msg::kError, "fail_sysmap=Failed to map file '{1}'")(path));
		return -1;
	}

	if (zip_verify) {
		gui_msg("verify_zip_sig=Verifying zip signature...");
		std::vector<Certificate> loadedKeys;
		if (!load_keys("/res/keys", loadedKeys)) {
			LOGINFO("Failed to load keys");
			gui_err("verify_zip_fail=Zip signature verification failed!");
			return -1;
		}
		ret_val = verify_file(map.addr, map.length, loadedKeys, NULL);
		if (ret_val != VERIFY_SUCCESS) {
			LOGINFO("Zip signature verification failed: %i\n", ret_val);
			gui_err("verify_zip_fail=Zip signature verification failed!");
			sysReleaseMap(&map);
			return -1;
		} else {
			gui_msg("verify_zip_done=Zip signature verified successfully.");
		}
	}
	ret_val = mzOpenZipArchive(map.addr, map.length, &Zip);
	if (ret_val != 0) {
		gui_err("zip_corrupt=Zip file is corrupt!");
		sysReleaseMap(&map);
		return INSTALL_CORRUPT;
	}

	time_t start, stop;
	time(&start);
	const ZipEntry* file_location = mzFindZipEntry(&Zip, ASSUMED_UPDATE_BINARY_NAME);
	if (file_location != NULL) {
		LOGINFO("Update binary zip\n");
		ret_val = Prepare_Update_Binary(path, &Zip, wipe_cache);
		if (ret_val == INSTALL_SUCCESS)
			ret_val = Run_Update_Binary(path, &Zip, wipe_cache, UPDATE_BINARY_ZIP_TYPE);
	} else {
		file_location = mzFindZipEntry(&Zip, AB_OTA);
		if (file_location != NULL) {
			LOGINFO("AB zip\n");
			ret_val = Run_Update_Binary(path, &Zip, wipe_cache, AB_OTA_ZIP_TYPE);
		} else {
			file_location = mzFindZipEntry(&Zip, "ui.xml");
			if (file_location != NULL) {
				LOGINFO("TWRP theme zip\n");
				ret_val = Install_Theme(path, &Zip);
			} else {
				mzCloseZipArchive(&Zip);
				ret_val = INSTALL_CORRUPT;
			}
		}
	}
	time(&stop);
	int total_time = (int) difftime(stop, start);
	if (ret_val == INSTALL_CORRUPT) {
		gui_err("invalid_zip_format=Invalid zip file format!");
	} else {
		LOGINFO("Install took %i second(s).\n", total_time);
	}
	sysReleaseMap(&map);
	return ret_val;
}