twinstallorig.cpp 12.4 KB
Newer Older
Ethan Yonker's avatar
Ethan Yonker committed
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;
}