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