server/internal-encryption.cpp

   1 /*
   2  *  Copyright (c) 2015-2017 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  *  Licensed under the Apache License, Version 2.0 (the "License");
   5  *  you may not use this file except in compliance with the License.
   6  *  You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  *  Unless required by applicable law or agreed to in writing, software
  11  *  distributed under the License is distributed on an "AS IS" BASIS,
  12  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  *  See the License for the specific language governing permissions and
  14  *  limitations under the License
  15  */
  16 #include <set>
  17 #include <algorithm>
  18 #include <memory>
  19
  20 #include <fcntl.h>
  21 #include <signal.h>
  22 #include <unistd.h>
  23 #include <sys/mount.h>
  24 #include <sys/reboot.h>
  25 #include <limits.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include <vconf.h>
  30 #include <tzplatform_config.h>
  31 #include <klay/process.h>
  32 #include <klay/file-user.h>
  33 #include <klay/filesystem.h>
  34 #include <klay/dbus/connection.h>
  35
  36 #include "misc.h"
  37 #include "logger.h"
  38 #include "progress-bar.h"
  39
  40 #include "internal-encryption.h"
  41
  42 namespace ode {
  43
  44 namespace {
  45
  46 const char *INTERNAL_DEV_PATH   = "/dev/disk/by-partlabel";
  47 const char *INTERNAL_DEV_NAME   = "USER";
  48 const char *INTERNAL_PATH               = "/opt/usr";
  49
  50 const char *PRIVILEGE_PLATFORM  = "http://tizen.org/privilege/internal/default/platform";
  51
  52 // TODO: see recovery()
  53 const std::string PROG_FACTORY_RESET = "/usr/bin/dbus-send";
  54 const std::vector<std::string> wipeCommand = {
  55     PROG_FACTORY_RESET,
  56     "--system",
  57     "--type=signal",
  58     "--print-reply",
  59     "--dest=com.samsung.factoryreset",
  60     "/com/samsung/factoryreset",
  61     "com.samsung.factoryreset.start.setting"
  62 };
  63
  64 std::string findDevPath()
  65 {
  66         std::string source = INTERNAL_DEV_PATH + std::string("/") + INTERNAL_DEV_NAME;
  67         try {
  68                 runtime::DirectoryIterator iter(INTERNAL_DEV_PATH), end;
  69
  70                 while (iter != end) {
  71                         const std::string& path = (*iter).getPath();
  72                         std::string name = path.substr(path.rfind('/') + 1);
  73                         std::string upper;
  74                         upper.reserve(name.size());
  75                         for (char c : name) {
  76                                 upper += std::toupper(c);
  77                         }
  78                         if (upper.compare(0, strlen(INTERNAL_DEV_NAME), INTERNAL_DEV_NAME) == 0) {
  79                                 source = path;
  80                                 break;
  81                         }
  82                         ++iter;
  83                 }
  84         } catch (runtime::Exception &e) {}
  85
  86         char *dev = ::realpath(source.c_str(), NULL);
  87         if (dev == NULL) {
  88                 ERROR(SINK, "failed to get device path");
  89                 return "";
  90         }
  91
  92         std::string devPath(dev);
  93         free(dev);
  94
  95         return devPath;
  96 }
  97
  98 void stopKnownSystemdServices() {
  99         std::vector<std::string> knownSystemdServices;
 100         dbus::Connection& systemDBus = dbus::Connection::getSystem();
 101         dbus::VariantIterator iter;
 102
 103         systemDBus.methodcall("org.freedesktop.systemd1",
 104                                                         "/org/freedesktop/systemd1",
 105                                                         "org.freedesktop.systemd1.Manager",
 106                                                         "ListUnits",
 107                                                         -1, "(a(ssssssouso))", "")
 108                                                                 .get("(a(ssssssouso))", &iter);
 109
 110         while (1) {
 111                 unsigned int dataUint;
 112                 char *dataStr[9];
 113                 int ret;
 114
 115                 ret = iter.get("(ssssssouso)", dataStr, dataStr + 1, dataStr + 2,
 116                                                 dataStr + 3, dataStr + 4, dataStr + 5,
 117                                                 dataStr + 6, &dataUint, dataStr + 7,
 118                                                 dataStr + 8);
 119
 120                 if (!ret) {
 121                         break;
 122                 }
 123
 124                 std::string service(dataStr[0]);
 125                 if (service.compare(0, 5, "user@") == 0 ||
 126                         service == "tlm.service" ||
 127                         service == "resourced.service") {
 128                         knownSystemdServices.push_back(service);
 129                 }
 130         }
 131
 132         for (const std::string& service : knownSystemdServices) {
 133                 INFO(SINK, "Stop service - " + service);
 134                 systemDBus.methodcall("org.freedesktop.systemd1",
 135                                                                 "/org/freedesktop/systemd1",
 136                                                                 "org.freedesktop.systemd1.Manager",
 137                                                                 "StopUnit",
 138                                                                 -1, "", "(ss)", service.c_str(), "flush");
 139         }
 140
 141         sleep(1);
 142 }
 143
 144 void stopDependedSystemdServices()
 145 {
 146         dbus::Connection& systemDBus = dbus::Connection::getSystem();
 147         std::set<std::string> servicesToStop;
 148
 149         for (pid_t pid : runtime::FileUser::getList(INTERNAL_PATH, true)) {
 150                 try {
 151                         char *service;
 152                         systemDBus.methodcall("org.freedesktop.systemd1",
 153                                                                         "/org/freedesktop/systemd1",
 154                                                                         "org.freedesktop.systemd1.Manager",
 155                                                                         "GetUnitByPID",
 156                                                                         -1, "(o)", "(u)", (unsigned int)pid)
 157                                                                                 .get("(o)", &service);
 158                         servicesToStop.insert(service);
 159                 } catch (runtime::Exception &e) {
 160                         INFO(SINK, "Close process - " + std::to_string(pid));
 161                         ::kill(pid, SIGKILL);
 162                 }
 163         }
 164
 165         for (const std::string& service : servicesToStop) {
 166                 INFO(SINK, "Close service - " + service);
 167                 systemDBus.methodcall("org.freedesktop.systemd1",
 168                                                                 service,
 169                                                                 "org.freedesktop.systemd1.Unit",
 170                                                                 "Stop",
 171                                                                 -1, "", "(s)", "flush");
 172         }
 173 }
 174
 175 void showProgressUI(const std::string type) {
 176         ::tzplatform_set_user(::tzplatform_getuid(TZ_SYS_DEFAULT_USER));
 177         std::string defaultUserHome(::tzplatform_getenv(TZ_USER_HOME));
 178         ::tzplatform_reset_user();
 179
 180         try {
 181                 runtime::File shareDirectory("/opt/home/root/share");
 182                 if (!shareDirectory.exists()) {
 183                         shareDirectory.makeDirectory(true);
 184                 }
 185
 186                 runtime::File elmConfigDir(shareDirectory.getPath() + "/.elementary");
 187                 if (!elmConfigDir.exists()) {
 188                         runtime::File defaultElmConfigDir(defaultUserHome + "/share/.elementary");
 189                         defaultElmConfigDir.copyTo(shareDirectory.getPath());
 190                 }
 191         } catch (runtime::Exception &e) {
 192                 ERROR(SINK, "Failed to set up elm configuration");
 193         }
 194
 195         std::vector<std::string> args = {
 196                 "ode", "progress", type, "Internal"
 197         };
 198
 199         runtime::Process proc("/usr/bin/ode", args);
 200         proc.execute();
 201 }
 202
 203 unsigned int getOptions()
 204 {
 205         unsigned int result = 0;
 206         int value;
 207
 208         value = 0;
 209         ::vconf_get_bool(VCONFKEY_ODE_FAST_ENCRYPTION, &value);
 210         if (value) {
 211                 result |= InternalEncryption::Option::IncludeUnusedRegion;
 212         }
 213
 214         return result;
 215 }
 216
 217 void setOptions(unsigned int options)
 218 {
 219         bool value;
 220
 221         if (options & InternalEncryption::Option::IncludeUnusedRegion) {
 222                 value = true;
 223         } else {
 224                 value = false;
 225         }
 226         ::vconf_set_bool(VCONFKEY_ODE_FAST_ENCRYPTION, value);
 227 }
 228
 229 }
 230
 231 InternalEncryptionServer::InternalEncryptionServer(ServerContext& srv) :
 232         server(srv)
 233 {
 234         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::setMountPassword)(std::string));
 235         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::mount)());
 236         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::umount)());
 237         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::encrypt)(std::string, unsigned int));
 238         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::decrypt)(std::string));
 239         server.expose(this, "", (int)(InternalEncryptionServer::isPasswordInitialized)());
 240         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::initPassword)(std::string));
 241         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::cleanPassword)(std::string));
 242         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::changePassword)(std::string, std::string));
 243         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::verifyPassword)(std::string));
 244         server.expose(this, "", (int)(InternalEncryptionServer::getState)());
 245         server.expose(this, "", (unsigned int)(InternalEncryptionServer::getSupportedOptions)());
 246
 247         server.createNotification("InternalEncryptionServer::mount");
 248
 249         std::string source = findDevPath();
 250
 251         engine.reset(new INTERNAL_ENGINE(
 252                 source, INTERNAL_PATH,
 253                 ProgressBar([](int v) {
 254                         ::vconf_set_str(VCONFKEY_ODE_ENCRYPT_PROGRESS,
 255                                                         std::to_string(v).c_str());
 256                 })
 257         ));
 258 }
 259
 260 InternalEncryptionServer::~InternalEncryptionServer()
 261 {
 262 }
 263
 264 int InternalEncryptionServer::setMountPassword(const std::string& password)
 265 {
 266         KeyManager::data pwData(password.begin(), password.end());
 267         KeyManager keyManager(engine->getKeyMeta());
 268         if (!keyManager.verifyPassword(pwData)) {
 269                 return -2;
 270         }
 271
 272         mountKey = keyManager.getMasterKey(pwData);
 273
 274         return 0;
 275 }
 276
 277 int InternalEncryptionServer::mount()
 278 {
 279         if (mountKey.empty()) {
 280                 ERROR(SINK, "You need to call set_mount_password() first");
 281                 return -1;
 282         }
 283
 284         KeyManager::data key = mountKey;
 285         mountKey.clear();
 286
 287         if (getState() != State::Encrypted) {
 288                 return -1;
 289         }
 290
 291     if (engine->isMounted()) {
 292                 INFO(SINK, "Already mounted");
 293                 return 0;
 294         }
 295
 296         try {
 297                 INFO(SINK, "Mount internal storage...");
 298                 engine->mount(key, getOptions());
 299
 300                 server.notify("InternalEncryptionServer::mount");
 301
 302                 runtime::File("/tmp/.lazy_mount").create(O_WRONLY);
 303                 runtime::File("/tmp/.unlock_mnt").create(O_WRONLY);
 304         } catch (runtime::Exception &e) {
 305                 ERROR(SINK, "Mount failed - " + std::string(e.what()));
 306                 return -1;
 307         }
 308
 309         return 0;
 310 }
 311
 312 int InternalEncryptionServer::umount()
 313 {
 314         if (getState() != State::Encrypted) {
 315                 return -1;
 316         }
 317
 318         if (!engine->isMounted()) {
 319                 INFO(SINK, "Already umounted");
 320                 return 0;
 321         }
 322
 323         try {
 324                 INFO(SINK, "Close all processes using internal storage...");
 325                 stopDependedSystemdServices();
 326                 INFO(SINK, "Umount internal storage...");
 327                 engine->umount();
 328         } catch (runtime::Exception &e) {
 329                 ERROR(SINK, "Umount failed - " + std::string(e.what()));
 330                 return -1;
 331         }
 332
 333         return 0;
 334 }
 335
 336 int InternalEncryptionServer::encrypt(const std::string& password, unsigned int options)
 337 {
 338         if (getState() != State::Unencrypted) {
 339                 return -1;
 340         }
 341
 342         KeyManager::data pwData(password.begin(), password.end());
 343         KeyManager keyManager(engine->getKeyMeta());
 344
 345         if (!keyManager.verifyPassword(pwData)) {
 346                 return -2;
 347         }
 348
 349         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 350         auto encryptWorker = [MasterKey, options, this]() {
 351                 try {
 352                         std::string source = engine->getSource();
 353                         std::string mntPath = findMntPath(source);
 354
 355                         if (!mntPath.empty()) {
 356                                 INFO(SINK, "Close all known systemd services that might be using internal storage...");
 357                                 stopKnownSystemdServices();
 358                                 INFO(SINK, "Close all processes using internal storage...");
 359                                 stopDependedSystemdServices();
 360                         }
 361
 362                         while (!mntPath.empty()) {
 363                                 INFO(SINK, "Umount internal storage...");
 364                                 while (::umount(mntPath.c_str()) == -1) {
 365                                         if (errno != EBUSY) {
 366                                                 throw runtime::Exception("Umount error - " + std::to_string(errno));
 367                                         }
 368                                         stopDependedSystemdServices();
 369                                 }
 370                                 mntPath = findMntPath(source);
 371                         }
 372
 373                         showProgressUI("Encrypting");
 374
 375                         INFO(SINK, "Encryption started...");
 376                         engine->encrypt(MasterKey, options);
 377                         setOptions(options & getSupportedOptions());
 378
 379                         INFO(SINK, "Encryption completed");
 380                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "encrypted");
 381                         server.notify("InternalEncryptionServer::mount");
 382
 383                         INFO(SINK, "Syncing disk and rebooting...");
 384                         ::sync();
 385                         ::reboot(RB_AUTOBOOT);
 386                 } catch (runtime::Exception &e) {
 387                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "error_partially_encrypted");
 388                         ERROR(SINK, "Encryption failed - " + std::string(e.what()));
 389                 }
 390         };
 391
 392         std::thread asyncWork(encryptWorker);
 393         asyncWork.detach();
 394
 395         return 0;
 396 }
 397
 398 int InternalEncryptionServer::decrypt(const std::string& password)
 399 {
 400         if (getState() != State::Encrypted) {
 401                 return -1;
 402         }
 403
 404         KeyManager::data pwData(password.begin(), password.end());
 405         KeyManager keyManager(engine->getKeyMeta());
 406
 407         if (!keyManager.verifyPassword(pwData)) {
 408                 return -2;
 409         }
 410
 411         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 412         auto decryptWorker = [MasterKey, this]() {
 413                 try {
 414                         if (engine->isMounted()) {
 415                                 INFO(SINK, "Close all known systemd services that might be using internal storage...");
 416                                 stopKnownSystemdServices();
 417                                 INFO(SINK, "Close all processes using internal storage...");
 418                                 stopDependedSystemdServices();
 419
 420                                 INFO(SINK, "Umount internal storage...");
 421                                 while (1) {
 422                                         try {
 423                                                 engine->umount();
 424                                                 break;
 425                                         } catch (runtime::Exception& e) {
 426                                                 stopDependedSystemdServices();
 427                                         }
 428                                 }
 429                         }
 430
 431                         showProgressUI("Decrypting");
 432
 433                         INFO(SINK, "Decryption started...");
 434                         engine->decrypt(MasterKey, getOptions());
 435
 436                         INFO(SINK, "Decryption completed");
 437                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "unencrypted");
 438
 439                         INFO(SINK, "Syncing disk and rebooting...");
 440                         ::sync();
 441                         ::reboot(RB_AUTOBOOT);
 442                 } catch (runtime::Exception &e) {
 443                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "error_partially_encrypted");
 444                         ERROR(SINK, "Decryption failed - " + std::string(e.what()));
 445                 }
 446         };
 447
 448         std::thread asyncWork(decryptWorker);
 449         asyncWork.detach();
 450
 451         return 0;
 452 }
 453
 454 int InternalEncryptionServer::recovery()
 455 {
 456         if (getState() != State::Unencrypted) {
 457                 return -1;
 458         }
 459
 460         //TODO
 461         runtime::Process proc(PROG_FACTORY_RESET, wipeCommand);
 462         if (proc.execute() == -1) {
 463                 ERROR(SINK, "Failed to launch factory-reset");
 464                 return -2;
 465         }
 466
 467         return 0;
 468 }
 469
 470 int InternalEncryptionServer::isPasswordInitialized()
 471 {
 472         if (engine->isKeyMetaSet()) {
 473                 return 1;
 474         }
 475         return 0;
 476 }
 477
 478 int InternalEncryptionServer::initPassword(const std::string& password)
 479 {
 480         KeyManager::data pwData(password.begin(), password.end());
 481         KeyManager keyManager;
 482
 483         keyManager.initPassword(pwData);
 484         engine->setKeyMeta(keyManager.serialize());
 485         return 0;
 486 }
 487
 488 int InternalEncryptionServer::cleanPassword(const std::string& password)
 489 {
 490         KeyManager::data pwData(password.begin(), password.end());
 491         KeyManager keyManager(engine->getKeyMeta());
 492
 493         if (!keyManager.verifyPassword(pwData)) {
 494                 return -2;
 495         }
 496
 497         engine->clearKeyMeta();
 498         return 0;
 499 }
 500
 501 int InternalEncryptionServer::changePassword(const std::string& oldPassword,
 502                                                                                 const std::string& newPassword)
 503 {
 504         KeyManager::data oldPwData(oldPassword.begin(), oldPassword.end());
 505         KeyManager::data newPwData(newPassword.begin(), newPassword.end());
 506         KeyManager keyManager(engine->getKeyMeta());
 507
 508         if (!keyManager.verifyPassword(oldPwData)) {
 509                 return -2;
 510         }
 511
 512         keyManager.changePassword(oldPwData, newPwData);
 513         engine->setKeyMeta(keyManager.serialize());
 514
 515         return 0;
 516 }
 517
 518 int InternalEncryptionServer::verifyPassword(const std::string& password)
 519 {
 520         KeyManager::data pwData(password.begin(), password.end());
 521         KeyManager keyManager(engine->getKeyMeta());
 522
 523         if (keyManager.verifyPassword(pwData)) {
 524                 return 1;
 525         }
 526         return 0;
 527 }
 528
 529 int InternalEncryptionServer::getState()
 530 {
 531         char *value = ::vconf_get_str(VCONFKEY_ODE_CRYPTO_STATE);
 532         if (value == NULL) {
 533                 throw runtime::Exception("Failed to get vconf value");
 534         }
 535
 536         std::string valueStr(value);
 537         free(value);
 538
 539         if (valueStr == "encrypted") {
 540                 return State::Encrypted;
 541         } else if (valueStr == "unencrypted") {
 542                 return State::Unencrypted;
 543         } else {
 544                 return State::Corrupted;
 545         }
 546
 547         return 0;
 548 }
 549
 550 unsigned int InternalEncryptionServer::getSupportedOptions()
 551 {
 552         return engine->getSupportedOptions();
 553 }
 554
 555 } // namespace ode