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