server/internal-encryption.cpp

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