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