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