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
  19 #include <fcntl.h>
  20 #include <signal.h>
  21 #include <unistd.h>
  22 #include <sys/mount.h>
  23 #include <sys/reboot.h>
  24 #include <stdio.h>
  25 #include <mntent.h>
  26 #include <limits.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include <vconf.h>
  31 #include <tzplatform_config.h>
  32 #include <klay/process.h>
  33 #include <klay/file-user.h>
  34 #include <klay/filesystem.h>
  35 #include <klay/dbus/connection.h>
  36
  37 #include "vconf.h"
  38 #include "logger.h"
  39 #include "progress-bar.h"
  40 #include "engine/encryption/dmcrypt-engine.h"
  41 #include "key-manager/key-manager.h"
  42
  43 #include "rmi/internal-encryption.h"
  44
  45 #define INTERNAL_ENGINE DMCryptEngine
  46 #define INTERNAL_DEV_PATH       "/dev/disk/by-partlabel"
  47 #define INTERNAL_DEV_NAME       "USER"
  48 #define INTERNAL_PATH           "/opt/usr"
  49 #define INTERNAL_STATE_VCONF_KEY                                        VCONFKEY_ODE_CRYPTO_STATE
  50 #define INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY      VCONFKEY_ODE_FAST_ENCRYPTION
  51
  52 #define PRIVILEGE_PLATFORM "http://tizen.org/privilege/internal/default/platform"
  53
  54 const std::string PROG_FACTORY_RESET = "/usr/bin/dbus-send";
  55 const std::vector<std::string> wipeCommand = {
  56     PROG_FACTORY_RESET,
  57     "--system",
  58     "--type=signal",
  59     "--print-reply",
  60     "--dest=com.samsung.factoryreset",
  61     "/com/samsung/factoryreset",
  62     "com.samsung.factoryreset.start.setting"
  63 };
  64
  65 namespace ode {
  66
  67 namespace {
  68
  69 std::string findDevPath()
  70 {
  71         std::string source = INTERNAL_DEV_PATH "/" INTERNAL_DEV_NAME;
  72         try {
  73                 runtime::DirectoryIterator iter(INTERNAL_DEV_PATH), end;
  74
  75                 while (iter != end) {
  76                         const std::string& path = (*iter).getPath();
  77                         std::string name = path.substr(path.rfind('/') + 1);
  78                         std::string upper;
  79                         upper.reserve(name.size());
  80                         for (char c : name) {
  81                                 upper += std::toupper(c);
  82                         }
  83                         if (upper.compare(0, strlen(INTERNAL_DEV_NAME), INTERNAL_DEV_NAME) == 0) {
  84                                 source = path;
  85                                 break;
  86                         }
  87                         ++iter;
  88                 }
  89         } catch (runtime::Exception &e) {}
  90
  91         char *dev = ::realpath(source.c_str(), NULL);
  92         if (dev == NULL) {
  93                 throw runtime::Exception("Failed to find device path.");
  94         }
  95
  96         std::string devPath(dev);
  97         free(dev);
  98
  99         return devPath;
 100 }
 101
 102 std::string findMntPath(const std::string &devPath)
 103 {
 104         std::string ret;
 105
 106         FILE* mtab = ::setmntent("/etc/mtab", "r");
 107         struct mntent* entry = NULL;
 108         while ((entry = ::getmntent(mtab)) != NULL) {
 109                 if (devPath == entry->mnt_fsname) {
 110                         ret = entry->mnt_dir;
 111                         break;
 112                 }
 113         }
 114         ::endmntent(mtab);
 115
 116         return ret;
 117 }
 118
 119 std::unique_ptr<INTERNAL_ENGINE> engine;
 120 KeyManager::data mountKey;
 121
 122 void stopKnownSystemdServices() {
 123         std::vector<std::string> knownSystemdServices;
 124         dbus::Connection& systemDBus = dbus::Connection::getSystem();
 125         dbus::VariantIterator iter;
 126
 127         systemDBus.methodcall("org.freedesktop.systemd1",
 128                                                         "/org/freedesktop/systemd1",
 129                                                         "org.freedesktop.systemd1.Manager",
 130                                                         "ListUnits",
 131                                                         -1, "(a(ssssssouso))", "")
 132                                                                 .get("(a(ssssssouso))", &iter);
 133
 134         while (1) {
 135                 unsigned int dataUint;
 136                 char *dataStr[9];
 137                 int ret;
 138
 139                 ret = iter.get("(ssssssouso)", dataStr, dataStr + 1, dataStr + 2,
 140                                                 dataStr + 3, dataStr + 4, dataStr + 5,
 141                                                 dataStr + 6, &dataUint, dataStr + 7,
 142                                                 dataStr + 8);
 143
 144                 if (!ret) {
 145                         break;
 146                 }
 147
 148                 std::string service(dataStr[0]);
 149                 if (service.compare(0, 5, "user@") == 0 ||
 150                         service == "tlm.service" ||
 151                         service == "resourced.service") {
 152                         knownSystemdServices.push_back(service);
 153                 }
 154         }
 155
 156         for (const std::string& service : knownSystemdServices) {
 157                 INFO(SINK, "Stop service - " + service);
 158                 systemDBus.methodcall("org.freedesktop.systemd1",
 159                                                                 "/org/freedesktop/systemd1",
 160                                                                 "org.freedesktop.systemd1.Manager",
 161                                                                 "StopUnit",
 162                                                                 -1, "", "(ss)", service.c_str(), "flush");
 163         }
 164
 165         sleep(1);
 166 }
 167
 168 void stopDependedSystemdServices()
 169 {
 170         dbus::Connection& systemDBus = dbus::Connection::getSystem();
 171         std::set<std::string> servicesToStop;
 172
 173         for (pid_t pid : runtime::FileUser::getList(INTERNAL_PATH, true)) {
 174                 try {
 175                         char *service;
 176                         systemDBus.methodcall("org.freedesktop.systemd1",
 177                                                                         "/org/freedesktop/systemd1",
 178                                                                         "org.freedesktop.systemd1.Manager",
 179                                                                         "GetUnitByPID",
 180                                                                         -1, "(o)", "(u)", (unsigned int)pid)
 181                                                                                 .get("(o)", &service);
 182                         servicesToStop.insert(service);
 183                 } catch (runtime::Exception &e) {
 184                         INFO(SINK, "Close process - " + std::to_string(pid));
 185                         ::kill(pid, SIGKILL);
 186                 }
 187         }
 188
 189         for (const std::string& service : servicesToStop) {
 190                 INFO(SINK, "Close service - " + service);
 191                 systemDBus.methodcall("org.freedesktop.systemd1",
 192                                                                 service,
 193                                                                 "org.freedesktop.systemd1.Unit",
 194                                                                 "Stop",
 195                                                                 -1, "", "(s)", "flush");
 196         }
 197 }
 198
 199 void showProgressUI(const std::string type) {
 200         ::tzplatform_set_user(::tzplatform_getuid(TZ_SYS_DEFAULT_USER));
 201         std::string defaultUserHome(::tzplatform_getenv(TZ_USER_HOME));
 202         ::tzplatform_reset_user();
 203
 204         try {
 205                 runtime::File shareDirectory("/opt/home/root/share");
 206                 if (!shareDirectory.exists()) {
 207                         shareDirectory.makeDirectory(true);
 208                 }
 209
 210                 runtime::File elmConfigDir(shareDirectory.getPath() + "/.elementary");
 211                 if (!elmConfigDir.exists()) {
 212                         runtime::File defaultElmConfigDir(defaultUserHome + "/share/.elementary");
 213                         defaultElmConfigDir.copyTo(shareDirectory.getPath());
 214                 }
 215         } catch (runtime::Exception &e) {
 216                 ERROR(SINK, "Failed to set up elm configuration");
 217         }
 218
 219         std::vector<std::string> args = {
 220                 "ode", "progress", type, "Internal"
 221         };
 222
 223         runtime::Process proc("/usr/bin/ode", args);
 224         proc.execute();
 225 }
 226
 227 unsigned int getOptions()
 228 {
 229         unsigned int result = 0;
 230         int value;
 231
 232         value = 0;
 233         ::vconf_get_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, &value);
 234         if (value) {
 235                 result |= InternalEncryption::Option::IncludeUnusedRegion;
 236         }
 237
 238         return result;
 239 }
 240
 241 void setOptions(unsigned int options)
 242 {
 243         bool value;
 244
 245         if (options & InternalEncryption::Option::IncludeUnusedRegion) {
 246                 value = true;
 247         } else {
 248                 value = false;
 249         }
 250         ::vconf_set_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, value);
 251 }
 252
 253 }
 254
 255 InternalEncryption::InternalEncryption(ODEControlContext& ctx) :
 256         context(ctx)
 257 {
 258         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::setMountPassword)(std::string));
 259         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::mount)());
 260         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::umount)());
 261         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::encrypt)(std::string, unsigned int));
 262         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::decrypt)(std::string));
 263         context.expose(this, "", (int)(InternalEncryption::isPasswordInitialized)());
 264         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::initPassword)(std::string));
 265         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::cleanPassword)(std::string));
 266         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::changePassword)(std::string, std::string));
 267         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::verifyPassword)(std::string));
 268         context.expose(this, "", (int)(InternalEncryption::getState)());
 269         context.expose(this, "", (unsigned int)(InternalEncryption::getSupportedOptions)());
 270
 271         context.createNotification("InternalEncryption::mount");
 272
 273         std::string source = findDevPath();
 274
 275         engine.reset(new INTERNAL_ENGINE(
 276                 source, INTERNAL_PATH,
 277                 ProgressBar([](int v) {
 278                         ::vconf_set_str(VCONFKEY_ODE_ENCRYPT_PROGRESS,
 279                                                         std::to_string(v).c_str());
 280                 })
 281         ));
 282 }
 283
 284 InternalEncryption::~InternalEncryption()
 285 {
 286 }
 287
 288 int InternalEncryption::setMountPassword(const std::string& password)
 289 {
 290         KeyManager::data pwData(password.begin(), password.end());
 291         KeyManager keyManager(engine->getKeyMeta());
 292         if (!keyManager.verifyPassword(pwData)) {
 293                 return -2;
 294         }
 295
 296         ode::mountKey = keyManager.getMasterKey(pwData);
 297
 298         return 0;
 299 }
 300
 301 int InternalEncryption::mount()
 302 {
 303         if (getState() != State::Encrypted) {
 304                 return -1;
 305         }
 306
 307     if (engine->isMounted()) {
 308                 INFO(SINK, "Already mounted");
 309                 return 0;
 310         }
 311
 312         try {
 313                 INFO(SINK, "Mount internal storage...");
 314                 engine->mount(mountKey, getOptions());
 315                 mountKey.clear();
 316
 317                 context.notify("InternalEncryption::mount");
 318
 319                 runtime::File("/tmp/.lazy_mount").create(O_WRONLY);
 320                 runtime::File("/tmp/.unlock_mnt").create(O_WRONLY);
 321         } catch (runtime::Exception &e) {
 322                 ERROR(SINK, "Mount failed - " + std::string(e.what()));
 323                 return -1;
 324         }
 325
 326         return 0;
 327 }
 328
 329 int InternalEncryption::umount()
 330 {
 331         if (getState() != State::Encrypted) {
 332                 return -1;
 333         }
 334
 335         if (!engine->isMounted()) {
 336                 INFO(SINK, "Already umounted");
 337                 return 0;
 338         }
 339
 340         try {
 341                 INFO(SINK, "Close all processes using internal storage...");
 342                 stopDependedSystemdServices();
 343                 INFO(SINK, "Umount internal storage...");
 344                 engine->umount();
 345         } catch (runtime::Exception &e) {
 346                 ERROR(SINK, "Umount failed - " + std::string(e.what()));
 347                 return -1;
 348         }
 349
 350         return 0;
 351 }
 352
 353 int InternalEncryption::encrypt(const std::string& password, unsigned int options)
 354 {
 355         if (getState() != State::Unencrypted) {
 356                 return -1;
 357         }
 358
 359         KeyManager::data pwData(password.begin(), password.end());
 360         KeyManager keyManager(engine->getKeyMeta());
 361
 362         if (!keyManager.verifyPassword(pwData)) {
 363                 return -2;
 364         }
 365
 366         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 367         auto encryptWorker = [MasterKey, options, this]() {
 368                 try {
 369                         std::string source = engine->getSource();
 370                         std::string mntPath = findMntPath(source);
 371
 372                         if (!mntPath.empty()) {
 373                                 INFO(SINK, "Close all known systemd services that might be using internal storage...");
 374                                 stopKnownSystemdServices();
 375                                 INFO(SINK, "Close all processes using internal storage...");
 376                                 stopDependedSystemdServices();
 377                         }
 378
 379                         while (!mntPath.empty()) {
 380                                 INFO(SINK, "Umount internal storage...");
 381                                 while (::umount(mntPath.c_str()) == -1) {
 382                                         if (errno != EBUSY) {
 383                                                 throw runtime::Exception("Umount error - " + std::to_string(errno));
 384                                         }
 385                                         stopDependedSystemdServices();
 386                                 }
 387                                 mntPath = findMntPath(source);
 388                         }
 389
 390                         showProgressUI("Encrypting");
 391
 392                         INFO(SINK, "Encryption started...");
 393                         engine->encrypt(MasterKey, options);
 394                         setOptions(options & getSupportedOptions());
 395
 396                         INFO(SINK, "Encryption completed");
 397                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "encrypted");
 398                         context.notify("InternalEncryption::mount");
 399
 400                         INFO(SINK, "Syncing disk and rebooting...");
 401                         ::sync();
 402                         ::reboot(RB_AUTOBOOT);
 403                 } catch (runtime::Exception &e) {
 404                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 405                         ERROR(SINK, "Encryption failed - " + std::string(e.what()));
 406                 }
 407         };
 408
 409         std::thread asyncWork(encryptWorker);
 410         asyncWork.detach();
 411
 412         return 0;
 413 }
 414
 415 int InternalEncryption::decrypt(const std::string& password)
 416 {
 417         if (getState() != State::Encrypted) {
 418                 return -1;
 419         }
 420
 421         KeyManager::data pwData(password.begin(), password.end());
 422         KeyManager keyManager(engine->getKeyMeta());
 423
 424         if (!keyManager.verifyPassword(pwData)) {
 425                 return -2;
 426         }
 427
 428         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 429         auto decryptWorker = [MasterKey, this]() {
 430                 try {
 431                         if (engine->isMounted()) {
 432                                 INFO(SINK, "Close all known systemd services that might be using internal storage...");
 433                                 stopKnownSystemdServices();
 434                                 INFO(SINK, "Close all processes using internal storage...");
 435                                 stopDependedSystemdServices();
 436
 437                                 INFO(SINK, "Umount internal storage...");
 438                                 while (1) {
 439                                         try {
 440                                                 engine->umount();
 441                                                 break;
 442                                         } catch (runtime::Exception& e) {
 443                                                 stopDependedSystemdServices();
 444                                         }
 445                                 }
 446                         }
 447
 448                         showProgressUI("Decrypting");
 449
 450                         INFO(SINK, "Decryption started...");
 451                         engine->decrypt(MasterKey, getOptions());
 452
 453                         INFO(SINK, "Decryption completed");
 454                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "unencrypted");
 455
 456                         INFO(SINK, "Syncing disk and rebooting...");
 457                         ::sync();
 458                         ::reboot(RB_AUTOBOOT);
 459                 } catch (runtime::Exception &e) {
 460                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 461                         ERROR(SINK, "Decryption failed - " + std::string(e.what()));
 462                 }
 463         };
 464
 465         std::thread asyncWork(decryptWorker);
 466         asyncWork.detach();
 467
 468         return 0;
 469 }
 470
 471 int InternalEncryption::recovery()
 472 {
 473         if (getState() != State::Unencrypted) {
 474                 return -1;
 475         }
 476
 477         //TODO
 478         runtime::Process proc(PROG_FACTORY_RESET, wipeCommand);
 479         if (proc.execute() == -1) {
 480                 ERROR(SINK, "Failed to launch factory-reset");
 481                 return -2;
 482         }
 483
 484         return 0;
 485 }
 486
 487 int InternalEncryption::isPasswordInitialized()
 488 {
 489         if (engine->isKeyMetaSet()) {
 490                 return 1;
 491         }
 492         return 0;
 493 }
 494
 495 int InternalEncryption::initPassword(const std::string& password)
 496 {
 497         KeyManager::data pwData(password.begin(), password.end());
 498         KeyManager keyManager;
 499
 500         keyManager.initPassword(pwData);
 501         engine->setKeyMeta(keyManager.serialize());
 502         return 0;
 503 }
 504
 505 int InternalEncryption::cleanPassword(const std::string& password)
 506 {
 507         KeyManager::data pwData(password.begin(), password.end());
 508         KeyManager keyManager(engine->getKeyMeta());
 509
 510         if (!keyManager.verifyPassword(pwData)) {
 511                 return -2;
 512         }
 513
 514         engine->clearKeyMeta();
 515         return 0;
 516 }
 517
 518 int InternalEncryption::changePassword(const std::string& oldPassword,
 519                                                                                 const std::string& newPassword)
 520 {
 521         KeyManager::data oldPwData(oldPassword.begin(), oldPassword.end());
 522         KeyManager::data newPwData(newPassword.begin(), newPassword.end());
 523         KeyManager keyManager(engine->getKeyMeta());
 524
 525         if (!keyManager.verifyPassword(oldPwData)) {
 526                 return -2;
 527         }
 528
 529         keyManager.changePassword(oldPwData, newPwData);
 530         engine->setKeyMeta(keyManager.serialize());
 531
 532         return 0;
 533 }
 534
 535 int InternalEncryption::verifyPassword(const std::string& password)
 536 {
 537         KeyManager::data pwData(password.begin(), password.end());
 538         KeyManager keyManager(engine->getKeyMeta());
 539
 540         if (keyManager.verifyPassword(pwData)) {
 541                 return 1;
 542         }
 543         return 0;
 544 }
 545
 546 int InternalEncryption::getState()
 547 {
 548         char *value = ::vconf_get_str(INTERNAL_STATE_VCONF_KEY);
 549         if (value == NULL) {
 550                 throw runtime::Exception("Failed to get vconf value");
 551         }
 552
 553         std::string valueStr(value);
 554         free(value);
 555
 556         if (valueStr == "encrypted") {
 557                 return State::Encrypted;
 558         } else if (valueStr == "unencrypted") {
 559                 return State::Unencrypted;
 560         } else {
 561                 return State::Corrupted;
 562         }
 563
 564         return 0;
 565 }
 566
 567 unsigned int InternalEncryption::getSupportedOptions()
 568 {
 569         return engine->getSupportedOptions();
 570 }
 571
 572 } // namespace ode