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 <signal.h>
  19 #include <unistd.h>
  20 #include <sys/mount.h>
  21 #include <sys/reboot.h>
  22
  23 #include <vconf.h>
  24 #include <tzplatform_config.h>
  25 #include <klay/process.h>
  26 #include <klay/file-user.h>
  27 #include <klay/filesystem.h>
  28 #include <klay/dbus/connection.h>
  29 #include <klay/audit/logger.h>
  30
  31 #include "vconf.h"
  32 #include "progress-bar.h"
  33 #include "engine/encryption/dmcrypt-engine.h"
  34 #include "key-manager/key-manager.h"
  35
  36 #include "rmi/internal-encryption.h"
  37
  38 #define INTERNAL_ENGINE DMCryptEngine
  39 #define INTERNAL_DEV    "/dev/mmcblk0p25"
  40 #define INTERNAL_PATH   "/opt/usr"
  41 #define INTERNAL_STATE_VCONF_KEY                                        VCONFKEY_ODE_CRYPTO_STATE
  42 #define INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY      VCONFKEY_ODE_FAST_ENCRYPTION
  43
  44 #define PRIVILEGE_PLATFORM "http://tizen.org/privilege/internal/default/platform"
  45
  46 const std::string PROG_FACTORY_RESET = "/usr/bin/dbus-send";
  47 const std::vector<std::string> wipeCommand = {
  48     PROG_FACTORY_RESET,
  49     "--system",
  50     "--type=signal",
  51     "--print-reply",
  52     "--dest=com.samsung.factoryreset",
  53     "/com/samsung/factoryreset",
  54     "com.samsung.factoryreset.start.setting"
  55 };
  56
  57 namespace ode {
  58
  59 namespace {
  60
  61 std::unique_ptr<INTERNAL_ENGINE> engine;
  62 KeyManager::data mountKey;
  63
  64 void stopSystemdUserSessions() {
  65         std::vector<std::string> userSessionServices;
  66         dbus::Connection& systemDBus = dbus::Connection::getSystem();
  67         dbus::VariantIterator iter;
  68
  69         systemDBus.methodcall("org.freedesktop.systemd1",
  70                                                         "/org/freedesktop/systemd1",
  71                                                         "org.freedesktop.systemd1.Manager",
  72                                                         "ListUnits",
  73                                                         -1, "(a(ssssssouso))", "")
  74                                                                 .get("(a(ssssssouso))", &iter);
  75
  76         while (1) {
  77                 unsigned int dataUint;
  78                 char *dataStr[9];
  79                 int ret;
  80
  81                 ret = iter.get("(ssssssouso)", dataStr, dataStr + 1, dataStr + 2,
  82                                                 dataStr + 3, dataStr + 4, dataStr + 5,
  83                                                 dataStr + 6, &dataUint, dataStr + 7,
  84                                                 dataStr + 8);
  85
  86                 if (!ret) {
  87                         break;
  88                 }
  89
  90                 std::string service(dataStr[0]);
  91                 if (service.compare(0, 5, "user@") == 0) {
  92                         userSessionServices.push_back(service);
  93                 }
  94         }
  95
  96         for (const std::string& service : userSessionServices) {
  97                 INFO("Stop service - " + service);
  98                 systemDBus.methodcall("org.freedesktop.systemd1",
  99                                                                 "/org/freedesktop/systemd1",
 100                                                                 "org.freedesktop.systemd1.Manager",
 101                                                                 "StopUnit",
 102                                                                 -1, "", "(ss)", service.c_str(), "flush");
 103         }
 104
 105         sleep(1);
 106 }
 107
 108 void stopDependedSystemdServices()
 109 {
 110         dbus::Connection& systemDBus = dbus::Connection::getSystem();
 111         std::set<std::string> servicesToStop;
 112
 113         for (pid_t pid : runtime::FileUser::getList(INTERNAL_PATH, true)) {
 114                 try {
 115                         char *service;
 116                         systemDBus.methodcall("org.freedesktop.systemd1",
 117                                                                         "/org/freedesktop/systemd1",
 118                                                                         "org.freedesktop.systemd1.Manager",
 119                                                                         "GetUnitByPID",
 120                                                                         -1, "(o)", "(u)", (unsigned int)pid)
 121                                                                                 .get("(o)", &service);
 122                         servicesToStop.insert(service);
 123                 } catch (runtime::Exception &e) {
 124                         INFO("Close process - " + std::to_string(pid));
 125                         ::kill(pid, SIGKILL);
 126                 }
 127         }
 128
 129         for (const std::string& service : servicesToStop) {
 130                 INFO("Close service - " + service);
 131                 systemDBus.methodcall("org.freedesktop.systemd1",
 132                                                                 service,
 133                                                                 "org.freedesktop.systemd1.Unit",
 134                                                                 "Stop",
 135                                                                 -1, "", "(s)", "flush");
 136         }
 137 }
 138
 139 void showProgressUI(const std::string type) {
 140         ::tzplatform_set_user(::tzplatform_getuid(TZ_SYS_DEFAULT_USER));
 141         std::string defaultUserHome(::tzplatform_getenv(TZ_USER_HOME));
 142         ::tzplatform_reset_user();
 143
 144         try {
 145                 runtime::File shareDirectory("/opt/home/root/share");
 146                 if (!shareDirectory.exists()) {
 147                         shareDirectory.makeDirectory(true);
 148                 }
 149
 150                 runtime::File elmConfigDir(shareDirectory.getPath() + "/.elementary");
 151                 if (!elmConfigDir.exists()) {
 152                         runtime::File defaultElmConfigDir(defaultUserHome + "/share/.elementary");
 153                         defaultElmConfigDir.copyTo(shareDirectory.getPath());
 154                 }
 155         } catch (runtime::Exception &e) {
 156                 ERROR("Failed to set up elm configuration");
 157         }
 158
 159         std::vector<std::string> args = {
 160                 "ode", "progress", type, "Internal"
 161         };
 162
 163         runtime::Process proc("/usr/bin/ode", args);
 164         proc.execute();
 165 }
 166
 167 unsigned int getOptions()
 168 {
 169         unsigned int result = 0;
 170         int value;
 171
 172         value = 0;
 173         ::vconf_get_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, &value);
 174         if (value) {
 175                 result |= InternalEncryption::Option::IncludeUnusedRegion;
 176         }
 177
 178         return result;
 179 }
 180
 181 void setOptions(unsigned int options)
 182 {
 183         bool value;
 184
 185         if (options & InternalEncryption::Option::IncludeUnusedRegion) {
 186                 value = true;
 187         } else {
 188                 value = false;
 189         }
 190         ::vconf_set_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, value);
 191 }
 192
 193 }
 194
 195 InternalEncryption::InternalEncryption(ODEControlContext& ctx) :
 196         context(ctx)
 197 {
 198         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::setMountPassword)(std::string));
 199         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::mount)());
 200         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::umount)());
 201         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::encrypt)(std::string, unsigned int));
 202         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::decrypt)(std::string));
 203         context.expose(this, "", (int)(InternalEncryption::isPasswordInitialized)());
 204         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::initPassword)(std::string));
 205         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::cleanPassword)(std::string));
 206         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::changePassword)(std::string, std::string));
 207         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::verifyPassword)(std::string));
 208         context.expose(this, "", (int)(InternalEncryption::getState)());
 209         context.expose(this, "", (unsigned int)(InternalEncryption::getSupportedOptions)());
 210
 211         context.createNotification("InternalEncryption::mount");
 212
 213         engine.reset(new INTERNAL_ENGINE(
 214                 INTERNAL_DEV, INTERNAL_PATH,
 215                 ProgressBar([](int v) {
 216                         ::vconf_set_str(VCONFKEY_ODE_ENCRYPT_PROGRESS,
 217                                                         std::to_string(v).c_str());
 218                 })
 219         ));
 220 }
 221
 222 InternalEncryption::~InternalEncryption()
 223 {
 224 }
 225
 226 int InternalEncryption::setMountPassword(const std::string& password)
 227 {
 228         KeyManager::data pwData(password.begin(), password.end());
 229         KeyManager keyManager(engine->getKeyMeta());
 230         if (!keyManager.verifyPassword(pwData)) {
 231                 return -2;
 232         }
 233
 234         ode::mountKey = keyManager.getMasterKey(pwData);
 235
 236         return 0;
 237 }
 238
 239 int InternalEncryption::mount()
 240 {
 241         if (getState() != State::Encrypted) {
 242                 return -1;
 243         }
 244
 245     if (engine->isMounted()) {
 246                 INFO("Already mounted");
 247                 return 0;
 248         }
 249
 250         engine->mount(mountKey, getOptions());
 251         mountKey.clear();
 252
 253         context.notify("InternalEncryption::mount");
 254
 255         return 0;
 256 }
 257
 258 int InternalEncryption::umount()
 259 {
 260         if (getState() != State::Encrypted) {
 261                 return -1;
 262         }
 263
 264         if (!engine->isMounted()) {
 265                 INFO("Already umounted");
 266                 return 0;
 267         }
 268
 269         INFO("Close all processes using internal storage...");
 270         stopDependedSystemdServices();
 271         INFO("Umount internal storage...");
 272         engine->umount();
 273
 274         return 0;
 275 }
 276
 277 int InternalEncryption::encrypt(const std::string& password, unsigned int options)
 278 {
 279         if (getState() != State::Unencrypted) {
 280                 return -1;
 281         }
 282
 283         KeyManager::data pwData(password.begin(), password.end());
 284         KeyManager keyManager(engine->getKeyMeta());
 285
 286         if (!keyManager.verifyPassword(pwData)) {
 287                 return -2;
 288         }
 289
 290         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 291         auto encryptWorker = [MasterKey, options, this]() {
 292                 try {
 293                         INFO("Close all user sessions...");
 294                         stopSystemdUserSessions();
 295                         INFO("Close all processes using internal storage...");
 296                         stopDependedSystemdServices();
 297                         INFO("Umount internal storage...");
 298                         while (::umount(INTERNAL_PATH) == -1) {
 299                                 if (errno != EBUSY) {
 300                                         throw runtime::Exception("Umount error - " + std::to_string(errno));
 301                                 }
 302                                 stopDependedSystemdServices();
 303                         }
 304
 305                         showProgressUI("Encrypting");
 306
 307                         INFO("Encryption started...");
 308                         engine->encrypt(MasterKey, options);
 309                         setOptions(options & getSupportedOptions());
 310                         INFO("Sync disk...");
 311                         sync();
 312                         INFO("Encryption completed");
 313
 314                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "encrypted");
 315                         ::reboot(RB_AUTOBOOT);
 316                 } catch (runtime::Exception &e) {
 317                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 318                         ERROR("Encryption failed - " + std::string(e.what()));
 319                 }
 320         };
 321
 322         std::thread asyncWork(encryptWorker);
 323         asyncWork.detach();
 324
 325         return 0;
 326 }
 327
 328 int InternalEncryption::decrypt(const std::string& password)
 329 {
 330         if (getState() != State::Encrypted) {
 331                 return -1;
 332         }
 333
 334         KeyManager::data pwData(password.begin(), password.end());
 335         KeyManager keyManager(engine->getKeyMeta());
 336
 337         if (!keyManager.verifyPassword(pwData)) {
 338                 return -2;
 339         }
 340
 341         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 342         auto decryptWorker = [MasterKey, this]() {
 343                 try {
 344                         INFO("Close all user sessions...");
 345                         stopSystemdUserSessions();
 346                         INFO("Close all processes using internal storage...");
 347                         stopDependedSystemdServices();
 348                         INFO("Umount internal storage...");
 349                         while (1) {
 350                                 try {
 351                                         engine->umount();
 352                                         break;
 353                                 } catch (runtime::Exception& e) {
 354                                         stopDependedSystemdServices();
 355                                 }
 356                         }
 357
 358                         showProgressUI("Decrypting");
 359
 360                         INFO("Decryption started...");
 361                         engine->decrypt(MasterKey, getOptions());
 362                         INFO("Sync disk...");
 363                         sync();
 364                         INFO("Decryption completed");
 365
 366                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "unencrypted");
 367                         ::reboot(RB_AUTOBOOT);
 368                 } catch (runtime::Exception &e) {
 369                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 370                         ERROR("Decryption failed - " + std::string(e.what()));
 371                 }
 372         };
 373
 374         std::thread asyncWork(decryptWorker);
 375         asyncWork.detach();
 376
 377         return 0;
 378 }
 379
 380 int InternalEncryption::recovery()
 381 {
 382         if (getState() != State::Unencrypted) {
 383                 return -1;
 384         }
 385
 386         //TODO
 387         runtime::Process proc(PROG_FACTORY_RESET, wipeCommand);
 388         if (proc.execute() == -1) {
 389                 ERROR("Failed to launch factory-reset");
 390                 return -2;
 391         }
 392
 393         return 0;
 394 }
 395
 396 int InternalEncryption::isPasswordInitialized()
 397 {
 398         if (engine->isKeyMetaSet()) {
 399                 return 1;
 400         }
 401         return 0;
 402 }
 403
 404 int InternalEncryption::initPassword(const std::string& password)
 405 {
 406         KeyManager::data pwData(password.begin(), password.end());
 407         KeyManager keyManager;
 408
 409         keyManager.initPassword(pwData);
 410         engine->setKeyMeta(keyManager.serialize());
 411         return 0;
 412 }
 413
 414 int InternalEncryption::cleanPassword(const std::string& password)
 415 {
 416         KeyManager::data pwData(password.begin(), password.end());
 417         KeyManager keyManager(engine->getKeyMeta());
 418
 419         if (!keyManager.verifyPassword(pwData)) {
 420                 return -2;
 421         }
 422
 423         engine->clearKeyMeta();
 424         return 0;
 425 }
 426
 427 int InternalEncryption::changePassword(const std::string& oldPassword,
 428                                                                                 const std::string& newPassword)
 429 {
 430         KeyManager::data oldPwData(oldPassword.begin(), oldPassword.end());
 431         KeyManager::data newPwData(newPassword.begin(), newPassword.end());
 432         KeyManager keyManager(engine->getKeyMeta());
 433
 434         if (!keyManager.verifyPassword(oldPwData)) {
 435                 return -2;
 436         }
 437
 438         keyManager.changePassword(oldPwData, newPwData);
 439         engine->setKeyMeta(keyManager.serialize());
 440
 441         return 0;
 442 }
 443
 444 int InternalEncryption::verifyPassword(const std::string& password)
 445 {
 446         KeyManager::data pwData(password.begin(), password.end());
 447         KeyManager keyManager(engine->getKeyMeta());
 448
 449         if (keyManager.verifyPassword(pwData)) {
 450                 return 1;
 451         }
 452         return 0;
 453 }
 454
 455 int InternalEncryption::getState()
 456 {
 457         char *value = ::vconf_get_str(INTERNAL_STATE_VCONF_KEY);
 458         if (value == NULL) {
 459                 throw runtime::Exception("Failed to get vconf value");
 460         }
 461
 462         std::string valueStr(value);
 463         free(value);
 464
 465         if (valueStr == "encrypted") {
 466                 return State::Encrypted;
 467         } else if (valueStr == "unencrypted") {
 468                 return State::Unencrypted;
 469         } else {
 470                 return State::Corrupted;
 471         }
 472
 473         return 0;
 474 }
 475
 476 unsigned int InternalEncryption::getSupportedOptions()
 477 {
 478         return engine->getSupportedOptions();
 479 }
 480
 481 } // namespace ode