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 #include <mutex>
  20 #include <condition_variable>
  21 #include <list>
  22
  23 #include <fstream>
  24 #include <fcntl.h>
  25 #include <signal.h>
  26 #include <unistd.h>
  27 #include <sys/mount.h>
  28 #include <sys/reboot.h>
  29 #include <limits.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include <vconf.h>
  34 #include <tzplatform_config.h>
  35 #include <klay/process.h>
  36 #include <klay/file-user.h>
  37 #include <klay/filesystem.h>
  38 #include <klay/dbus/connection.h>
  39 #include <klay/error.h>
  40
  41 #include "misc.h"
  42 #include "logger.h"
  43 #include "progress-bar.h"
  44 #include "rmi/common.h"
  45
  46 #include "ext4-tool.h"
  47 #include "internal-encryption.h"
  48 #include "internal-encryption-common.h"
  49 #include "upgrade-support.h"
  50
  51 namespace ode {
  52
  53 namespace {
  54
  55 const char *PRIVILEGE_PLATFORM  = "http://tizen.org/privilege/internal/default/platform";
  56 const std::vector<std::string> blackListSystemdUnits = {
  57         "samsung-log-mgr.service",
  58 };
  59
  60 // watches systemd jobs
  61 class JobWatch {
  62 public:
  63         explicit JobWatch(dbus::Connection& systemDBus);
  64         ~JobWatch();
  65
  66         bool waitForJob(const std::string& job);
  67
  68 private:
  69         void jobRemoved(const dbus::Variant& parameters);
  70
  71         struct Job {
  72                 Job(uint32_t id,
  73                         const std::string& job,
  74                         const std::string& unit,
  75                         const std::string& result) : id(id), job(job), unit(unit), result(result) {}
  76                 uint32_t id;
  77                 std::string job;
  78                 std::string unit;
  79                 std::string result;
  80         };
  81
  82         dbus::Connection::SubscriptionId id;
  83         dbus::Connection& systemDBus;
  84         std::list<Job> removedJobs;
  85         std::mutex jobsMutex;
  86         std::condition_variable jobsCv;
  87 };
  88
  89 JobWatch::JobWatch(dbus::Connection& systemDBus) : systemDBus(systemDBus) {
  90         auto callback = [this](dbus::Variant parameters) {
  91                 this->jobRemoved(parameters);
  92         };
  93
  94         id = systemDBus.subscribeSignal("",
  95                                                                         "/org/freedesktop/systemd1",
  96                                                                         "org.freedesktop.systemd1.Manager",
  97                                                                         "JobRemoved",
  98                                                                         callback);
  99 }
 100
 101 JobWatch::~JobWatch() {
 102         systemDBus.unsubscribeSignal(id);
 103 }
 104
 105 bool JobWatch::waitForJob(const std::string& job) {
 106         while(true) {
 107                 std::unique_lock<std::mutex> lock(jobsMutex);
 108                 jobsCv.wait(lock, [this]{ return !removedJobs.empty(); });
 109
 110                 while(!removedJobs.empty()) {
 111                         bool match = (removedJobs.front().job == job);
 112                         bool done = (removedJobs.front().result == "done");
 113                         removedJobs.pop_front();
 114                         if (match)
 115                                 return done;
 116                 }
 117         };
 118 }
 119
 120 void JobWatch::jobRemoved(const dbus::Variant& parameters)
 121 {
 122         uint32_t id;
 123         const char* job;
 124         const char* unit;
 125         const char* result;
 126         parameters.get("(uoss)", &id, &job, &unit, &result);
 127         INFO(SINK, "id:" + std::to_string(id) + " job:" + job + " unit:" + unit + " result:" + result);
 128
 129         {
 130                 std::lock_guard<std::mutex> guard(jobsMutex);
 131                 removedJobs.emplace_back(id, job, unit, result);
 132         }
 133         jobsCv.notify_one();
 134 }
 135
 136 void stopKnownSystemdUnits()
 137 {
 138         std::vector<std::string> knownSystemdUnits;
 139         dbus::Connection& systemDBus = dbus::Connection::getSystem();
 140         dbus::VariantIterator iter;
 141
 142         systemDBus.methodcall("org.freedesktop.systemd1",
 143                                                         "/org/freedesktop/systemd1",
 144                                                         "org.freedesktop.systemd1.Manager",
 145                                                         "ListUnits",
 146                                                         -1, "(a(ssssssouso))", "")
 147                                                                 .get("(a(ssssssouso))", &iter);
 148
 149         while (1) {
 150                 unsigned int dataUint;
 151                 char *dataStr[9];
 152                 int ret;
 153
 154                 ret = iter.get("(ssssssouso)", dataStr, dataStr + 1, dataStr + 2,
 155                                                 dataStr + 3, dataStr + 4, dataStr + 5,
 156                                                 dataStr + 6, &dataUint, dataStr + 7,
 157                                                 dataStr + 8);
 158
 159                 if (!ret) {
 160                         break;
 161                 }
 162
 163                 std::string unit(dataStr[0]);
 164                 if (unit == "security-manager.socket" ||
 165                                 unit == "connman.socket") {
 166                         knownSystemdUnits.insert(knownSystemdUnits.begin(), unit);
 167                 } else if (unit.compare(0, 5, "user@") == 0 ||
 168                         unit == "tlm.service" ||
 169                         unit == "resourced.service" ||
 170                         unit == "security-manager.service") {
 171                         knownSystemdUnits.push_back(unit);
 172                 }
 173         }
 174
 175         JobWatch watch(systemDBus);
 176
 177         for (const std::string& unit : knownSystemdUnits) {
 178                 INFO(SINK, "Stopping unit: " + unit);
 179                 const char* job = NULL;
 180                 systemDBus.methodcall("org.freedesktop.systemd1",
 181                                                                 "/org/freedesktop/systemd1",
 182                                                                 "org.freedesktop.systemd1.Manager",
 183                                                                 "StopUnit",
 184                                                                 -1, "(o)", "(ss)", unit.c_str(), "flush").get("(o)", &job);
 185                 INFO(SINK, "Waiting for job: " + std::string(job));
 186                 if (!watch.waitForJob(job))
 187                         throw runtime::Exception("Stopping unit: " + unit + " failed");
 188         }
 189 }
 190
 191 std::string getDecodedPath(const std::string &path, const std::string &prefix)
 192 {
 193         std::string ret = path;
 194         size_t pos = 0;
 195
 196         pos = ret.find(prefix);
 197         if (pos != std::string::npos)
 198                 ret = ret.substr(prefix.size(), ret.size());
 199
 200         pos = 0;
 201         while ((pos = ret.find("_", pos)) != std::string::npos) {
 202                 int a = std::stoi(std::string(1, ret.at(pos+1)), nullptr, 16);
 203                 int b = std::stoi(std::string(1, ret.at(pos+2)), nullptr, 16);
 204                 if (a < 0 || b < 0)
 205                         ret.replace(pos, 3, "_");
 206                 else
 207                         ret.replace(pos, 3, std::string(1, ((a << 4) | b)));
 208                 pos += 1;
 209         }
 210         return ret;
 211 }
 212
 213 void stopDependedSystemdUnits()
 214 {
 215         dbus::Connection& systemDBus = dbus::Connection::getSystem();
 216         std::set<std::string> unitsToStop;
 217
 218         for (pid_t pid : runtime::FileUser::getList(INTERNAL_PATH, true)) {
 219                 try {
 220                         char *unit = nullptr;
 221                         systemDBus.methodcall("org.freedesktop.systemd1",
 222                                                                         "/org/freedesktop/systemd1",
 223                                                                         "org.freedesktop.systemd1.Manager",
 224                                                                         "GetUnitByPID",
 225                                                                         -1, "(o)", "(u)", (unsigned int)pid)
 226                                                                                 .get("(o)", &unit);
 227
 228                         auto unescapedName = getDecodedPath(unit, "/org/freedesktop/systemd1/unit/");
 229                         unitsToStop.insert(unescapedName);
 230                 } catch (runtime::Exception &e) {
 231                         INFO(SINK, "Killing process: " + std::to_string(pid));
 232                         ::kill(pid, SIGKILL);
 233                 }
 234         }
 235
 236         JobWatch watch(systemDBus);
 237         for (auto unit : blackListSystemdUnits) {
 238                 unitsToStop.erase(unitsToStop.find(unit));
 239         }
 240
 241         for (const std::string& unit : unitsToStop) {
 242                 INFO(SINK, "Stopping unit: " + unit);
 243                 const char* job = NULL;
 244                 systemDBus.methodcall("org.freedesktop.systemd1",
 245                                                                 "/org/freedesktop/systemd1",
 246                                                                 "org.freedesktop.systemd1.Manager",
 247                                                                 "StopUnit",
 248                                                                 -1, "(o)", "(ss)", unit.c_str(), "flush").get("(o)", &job);
 249                 INFO(SINK, "Waiting for job: " + std::string(job));
 250                 if (!watch.waitForJob(job))
 251                         throw runtime::Exception("Stopping unit: " + unit + " failed");
 252         }
 253 }
 254
 255 void showProgressUI(const std::string type)
 256 {
 257         dbus::Connection& systemDBus = dbus::Connection::getSystem();
 258         std::string unit("ode-progress-ui@"+type+".service");
 259
 260         JobWatch watch(systemDBus);
 261         INFO(SINK, "Start unit: " + unit);
 262
 263         const char* job = NULL;
 264         systemDBus.methodcall("org.freedesktop.systemd1",
 265                                                         "/org/freedesktop/systemd1",
 266                                                         "org.freedesktop.systemd1.Manager",
 267                                                         "StartUnit",
 268                                                         -1, "(o)", "(ss)", unit.c_str(), "replace").get("(o)", &job);
 269
 270         INFO(SINK, "Waiting for job: " + std::string(job));
 271         if (!watch.waitForJob(job))
 272                 throw runtime::Exception("Starting unit: " + unit + " failed");
 273 }
 274
 275 unsigned int getOptions()
 276 {
 277         unsigned int result = 0;
 278         int value;
 279
 280         value = 0;
 281         ::vconf_get_bool(VCONFKEY_ODE_FAST_ENCRYPTION, &value);
 282         if (value) {
 283                 result |= InternalEncryption::Option::IncludeUnusedRegion;
 284         }
 285
 286         return result;
 287 }
 288
 289 void setOptions(unsigned int options)
 290 {
 291         bool value;
 292
 293         if (options & InternalEncryption::Option::IncludeUnusedRegion) {
 294                 value = true;
 295         } else {
 296                 value = false;
 297         }
 298         ::vconf_set_bool(VCONFKEY_ODE_FAST_ENCRYPTION, value);
 299 }
 300
 301 void execAndWait(const std::string &path, std::vector<std::string> &args)
 302 {
 303         runtime::Process proc(path, args);
 304         int ret = proc.execute();
 305         if (ret < 0)
 306                 ERROR(SINK, path + " failed for " + args.back());
 307
 308         ret = proc.waitForFinished();
 309         if (ret < 0 || !WIFEXITED(ret) || WEXITSTATUS(ret) != 0)
 310                 ERROR(SINK, path + " failed for " + args.back());
 311 }
 312
 313 bool isPartitionTerminated(const std::string &partition)
 314 {
 315         bool ret = true;
 316         const std::string cmd("fuser -m " + partition + " | grep -o '[0-9]*'");
 317         char *line = nullptr;
 318         size_t len = 0;
 319
 320         FILE *fp = ::popen(cmd.c_str(), "r");
 321         if (fp == nullptr) {
 322                 ERROR(SINK, "Failed to get processes on partition");
 323                 return false;
 324         }
 325
 326         if (::getline(&line, &len, fp) != -1)
 327                 ret = false;
 328
 329         ::free(line);
 330         ::pclose(fp);
 331
 332         return ret;
 333 }
 334
 335 void unmountInternalStorage(const std::string& source)
 336 {
 337         if (::umount2("/opt/usr", MNT_DETACH) == -1) {
 338                 if (errno != EBUSY && errno != EINVAL) {
 339                         throw runtime::Exception("umount() error : " + runtime::GetSystemErrorMessage());
 340                 }
 341         }
 342
 343         do {
 344                 ::sync();
 345                 static const char *fuserPath = "/usr/bin/fuser";
 346                 std::vector<std::string> args = {
 347                         fuserPath, "-m", "-k", "-s", "-SIGTERM", source,
 348                 };
 349                 execAndWait(fuserPath, args);
 350                 ::usleep((useconds_t)((unsigned int)(500)*1000));
 351
 352                 args[4] = "-SIGKILL";
 353                 execAndWait(fuserPath, args);
 354                 ::usleep((useconds_t)((unsigned int)(200)*1000));
 355         } while (!isPartitionTerminated(source));
 356 }
 357
 358 }
 359
 360 InternalEncryptionServer::InternalEncryptionServer(ServerContext& srv,
 361                                                                                                    KeyServer& key) :
 362         server(srv),
 363         keyServer(key)
 364 {
 365         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::setMountPassword)(std::string));
 366         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::mount)(std::vector<unsigned char>, unsigned int));
 367         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::umount)());
 368         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::encrypt)(std::string, unsigned int));
 369         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::decrypt)(std::string));
 370         server.expose(this, "", (int)(InternalEncryptionServer::isPasswordInitialized)());
 371         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::recovery)());
 372         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::initPassword)(std::string));
 373         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::cleanPassword)(std::string));
 374         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::changePassword)(std::string, std::string));
 375         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::verifyPassword)(std::string));
 376         server.expose(this, "", (int)(InternalEncryptionServer::getState)());
 377         server.expose(this, "", (unsigned int)(InternalEncryptionServer::getSupportedOptions)());
 378         server.expose(this, "", (std::string)(InternalEncryptionServer::getDevicePath)());
 379
 380         server.createNotification("InternalEncryptionServer::mount");
 381
 382         std::string source = findDevPath();
 383
 384         engine.reset(new INTERNAL_ENGINE(
 385                 source, INTERNAL_PATH,
 386                 ProgressBar([](int v) {
 387                         ::vconf_set_str(VCONFKEY_ODE_ENCRYPT_PROGRESS,
 388                                                         std::to_string(v).c_str());
 389                 })
 390         ));
 391 }
 392
 393 InternalEncryptionServer::~InternalEncryptionServer()
 394 {
 395 }
 396
 397 int InternalEncryptionServer::setMountPassword(const std::string& password)
 398 {
 399         const std::string& dev = engine->getSource();
 400
 401         // check if upgrade flag exists
 402         if(UpgradeSupport::removeUpgradeFlag()) {
 403                 INFO("Upgrade flag detected.");
 404                 // try to load the master key
 405                 try {
 406                         mountKey = UpgradeSupport::loadMasterKey(dev);
 407
 408                         // encrypt the master key with given password
 409                         return keyServer.changePassword2(dev, mountKey, password);
 410                 } catch (const runtime::Exception&) {
 411                         INFO("Failed to load the master key stored during upgrade.");
 412                 }
 413         }
 414
 415         return keyServer.get(dev, password, mountKey);
 416 }
 417
 418 int InternalEncryptionServer::mount(const std::vector<unsigned char> &mk, unsigned int options)
 419 {
 420         if (mountKey.empty() && mk.empty()) {
 421                 ERROR(SINK, "You need to set master key first.");
 422                 return error::NoData;
 423         }
 424
 425         BinaryData key = mk.empty() ? mountKey : mk;
 426         mountKey.clear();
 427
 428         if (getState() != State::Encrypted) {
 429                 INFO(SINK, "Cannot mount, SD partition's state incorrect.");
 430                 return error::NoSuchDevice;
 431         }
 432
 433         if (engine->isMounted()) {
 434                 INFO(SINK, "Partition already mounted.");
 435                 return error::None;
 436         }
 437
 438         INFO(SINK, "Mounting internal storage.");
 439         try {
 440                 engine->mount(key, getOptions());
 441
 442                 server.notify("InternalEncryptionServer::mount");
 443
 444                 runtime::File("/tmp/.lazy_mount").create(O_WRONLY);
 445                 runtime::File("/tmp/.unlock_mnt").create(O_WRONLY);
 446         } catch (runtime::Exception &e) {
 447                 ERROR(SINK, "Mount failed: " + std::string(e.what()));
 448                 return error::Unknown;
 449         }
 450
 451         return error::None;
 452 }
 453
 454 int InternalEncryptionServer::umount()
 455 {
 456         if (getState() != State::Encrypted) {
 457                 ERROR(SINK, "Cannot umount, partition's state incorrect.");
 458                 return error::NoSuchDevice;
 459         }
 460
 461         if (!engine->isMounted()) {
 462                 INFO(SINK, "Partition already umounted.");
 463                 return error::None;
 464         }
 465
 466         INFO(SINK, "Closing all processes using internal storage.");
 467         try {
 468                 stopKnownSystemdUnits();
 469                 stopDependedSystemdUnits();
 470                 INFO(SINK, "Umounting internal storage.");
 471                 unmountInternalStorage("/dev/mapper/userdata");
 472                 engine->umount();
 473         } catch (runtime::Exception &e) {
 474                 ERROR(SINK, "Umount failed: " + std::string(e.what()));
 475                 return error::Unknown;
 476         }
 477
 478         return error::None;
 479 }
 480
 481 int InternalEncryptionServer::encrypt(const std::string& password, unsigned int options)
 482 {
 483         if (getState() != State::Unencrypted) {
 484                 ERROR(SINK, "Cannot encrypt, partition's state incorrect.");
 485                 return error::NoSuchDevice;
 486         }
 487
 488         BinaryData masterKey;
 489         int ret = keyServer.get(engine->getSource(), password, masterKey);
 490         if (ret != error::None)
 491                 return ret;
 492
 493         auto encryptWorker = [masterKey, options, this]() {
 494                 try {
 495                         showProgressUI("encrypt");
 496                         ::sleep(1);
 497
 498                         runtime::File file("/opt/etc/.odeprogress");
 499                         file.create(0640);
 500
 501                         INFO(SINK, "Closing all known systemd services that might be using internal storage.");
 502                         stopKnownSystemdUnits();
 503
 504                         std::string source = engine->getSource();
 505                         auto mntPaths = findMountPointsByDevice(source);
 506
 507                         if (!mntPaths.empty()) {
 508                                 INFO(SINK, "Closing all processes using internal storage.");
 509                                 stopDependedSystemdUnits();
 510
 511                                 INFO(SINK, "Unmounting internal storage.");
 512                                 unmountInternalStorage(source);
 513                         }
 514
 515                         INFO(SINK, "Encryption started.");
 516                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "error_partially_encrypted");
 517                         engine->encrypt(masterKey, options);
 518                         setOptions(options & getSupportedOptions());
 519
 520                         INFO(SINK, "Encryption completed.");
 521                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "encrypted");
 522                         server.notify("InternalEncryptionServer::mount");
 523
 524                         file.remove();
 525
 526                         INFO(SINK, "Syncing disk and rebooting.");
 527                         ::sync();
 528                         ::reboot(RB_AUTOBOOT);
 529                 } catch (runtime::Exception &e) {
 530                         ERROR(SINK, "Encryption failed: " + std::string(e.what()));
 531                 }
 532         };
 533
 534         std::thread asyncWork(encryptWorker);
 535         asyncWork.detach();
 536
 537         return error::None;
 538 }
 539
 540 int InternalEncryptionServer::decrypt(const std::string& password)
 541 {
 542         if (getState() != State::Encrypted) {
 543                 ERROR(SINK, "Cannot decrypt, partition's state incorrect.");
 544                 return error::NoSuchDevice;
 545         }
 546
 547         BinaryData masterKey;
 548         int ret = keyServer.get(engine->getSource(), password, masterKey);
 549         if (ret != error::None)
 550                 return ret;
 551
 552         auto decryptWorker = [masterKey, this]() {
 553                 try {
 554                         showProgressUI("decrypt");
 555                         ::sleep(1);
 556
 557                         runtime::File file("/opt/etc/.odeprogress");
 558                         file.create(0640);
 559
 560                         if (engine->isMounted()) {
 561                                 INFO(SINK, "Closing all known systemd services that might be using internal storage.");
 562                                 stopKnownSystemdUnits();
 563                                 INFO(SINK, "Closing all processes using internal storage.");
 564                                 stopDependedSystemdUnits();
 565
 566                                 INFO(SINK, "Umounting internal storage.");
 567                                 unmountInternalStorage("/dev/mapper/userdata");
 568                                 engine->umount();
 569                         }
 570
 571                         INFO(SINK, "Decryption started.");
 572                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "error_partially_decrypted");
 573                         engine->decrypt(masterKey, getOptions());
 574
 575                         INFO(SINK, "Decryption complete.");
 576                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "unencrypted");
 577
 578                         file.remove();
 579
 580                         INFO(SINK, "Syncing disk and rebooting.");
 581                         ::sync();
 582                         ::reboot(RB_AUTOBOOT);
 583                 } catch (runtime::Exception &e) {
 584                         ERROR(SINK, "Decryption failed: " + std::string(e.what()));
 585                 }
 586         };
 587
 588         std::thread asyncWork(decryptWorker);
 589         asyncWork.detach();
 590
 591         return error::None;
 592 }
 593
 594 int InternalEncryptionServer::recovery()
 595 {
 596         int state = getState();
 597
 598         if (state == State::Unencrypted)
 599                 return error::NoSuchDevice;
 600
 601         runtime::File file("/opt/.factoryreset");
 602         file.create(0640);
 603
 604         ::sync();
 605         try {
 606                 dbus::Connection& systemDBus = dbus::Connection::getSystem();
 607                 systemDBus.methodcall("org.tizen.system.deviced",
 608                                                                 "/Org/Tizen/System/DeviceD/Power",
 609                                                                 "org.tizen.system.deviced.power",
 610                                                                 "reboot",
 611                                                                 -1, "()", "(si)", "reboot", 0);
 612         } catch (runtime::Exception &e) {
 613                 ::reboot(RB_AUTOBOOT);
 614         }
 615         return error::None;
 616 }
 617
 618 int InternalEncryptionServer::isPasswordInitialized()
 619 {
 620         return keyServer.isInitialized(engine->getSource());
 621 }
 622
 623 int InternalEncryptionServer::initPassword(const std::string& password)
 624 {
 625         return keyServer.init(engine->getSource(), password, Key::DEFAULT_256BIT);
 626 }
 627
 628 int InternalEncryptionServer::cleanPassword(const std::string& password)
 629 {
 630         return keyServer.remove(engine->getSource(), password);
 631 }
 632
 633 int InternalEncryptionServer::changePassword(const std::string& oldPassword,
 634                                                                                 const std::string& newPassword)
 635 {
 636         return keyServer.changePassword(engine->getSource(), oldPassword, newPassword);
 637 }
 638
 639 int InternalEncryptionServer::verifyPassword(const std::string& password)
 640 {
 641         return keyServer.verifyPassword(engine->getSource(), password);
 642 }
 643
 644 int InternalEncryptionServer::getState()
 645 {
 646         char *value = ::vconf_get_str(VCONFKEY_ODE_CRYPTO_STATE);
 647         if (value == NULL) {
 648                 throw runtime::Exception("Failed to get vconf value.");
 649         }
 650
 651         std::string valueStr(value);
 652         free(value);
 653
 654         if (valueStr == "encrypted")
 655                 return State::Encrypted;
 656         else if (valueStr == "unencrypted")
 657                 return State::Unencrypted;
 658         else if (valueStr == "error_partially_encrypted" || valueStr == "error_partially_decrypted")
 659                 return State::Corrupted;
 660
 661         return State::Invalid;
 662 }
 663
 664 unsigned int InternalEncryptionServer::getSupportedOptions()
 665 {
 666         return engine->getSupportedOptions();
 667 }
 668
 669 std::string InternalEncryptionServer::getDevicePath() const
 670 {
 671         return engine->getSource();
 672 }
 673
 674 } // namespace ode