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