server/internal-encryption.cpp

   1 /*
   2  *  Copyright (c) 2015-2017 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 #include <memory>
  19
  20 #include <fcntl.h>
  21 #include <signal.h>
  22 #include <unistd.h>
  23 #include <sys/mount.h>
  24 #include <sys/reboot.h>
  25 #include <limits.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include <vconf.h>
  30 #include <tzplatform_config.h>
  31 #include <klay/process.h>
  32 #include <klay/file-user.h>
  33 #include <klay/filesystem.h>
  34 #include <klay/dbus/connection.h>
  35 #include <klay/error.h>
  36
  37 #include "misc.h"
  38 #include "logger.h"
  39 #include "progress-bar.h"
  40 #include "rmi/common.h"
  41
  42 #include "internal-encryption.h"
  43 #include "internal-encryption-common.h"
  44
  45 namespace ode {
  46
  47 namespace {
  48
  49 const char *PRIVILEGE_PLATFORM  = "http://tizen.org/privilege/internal/default/platform";
  50
  51 // TODO: see recovery()
  52 const std::string PROG_FACTORY_RESET = "/usr/bin/dbus-send";
  53 const std::vector<std::string> wipeCommand = {
  54     PROG_FACTORY_RESET,
  55     "--system",
  56     "--type=signal",
  57     "--print-reply",
  58     "--dest=com.samsung.factoryreset",
  59     "/com/samsung/factoryreset",
  60     "com.samsung.factoryreset.start.setting"
  61 };
  62
  63 void stopKnownSystemdServices()
  64 {
  65         std::vector<std::string> knownSystemdServices;
  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                         service == "tlm.service" ||
  93                         service == "resourced.service") {
  94                         knownSystemdServices.push_back(service);
  95                 }
  96         }
  97
  98         for (const std::string& service : knownSystemdServices) {
  99                 INFO(SINK, "Stopping service: " + service);
 100                 systemDBus.methodcall("org.freedesktop.systemd1",
 101                                                                 "/org/freedesktop/systemd1",
 102                                                                 "org.freedesktop.systemd1.Manager",
 103                                                                 "StopUnit",
 104                                                                 -1, "", "(ss)", service.c_str(), "flush");
 105         }
 106
 107         sleep(1);
 108 }
 109
 110 void stopDependedSystemdServices()
 111 {
 112         dbus::Connection& systemDBus = dbus::Connection::getSystem();
 113         std::set<std::string> servicesToStop;
 114
 115         for (pid_t pid : runtime::FileUser::getList(INTERNAL_PATH, true)) {
 116                 try {
 117                         char *service;
 118                         systemDBus.methodcall("org.freedesktop.systemd1",
 119                                                                         "/org/freedesktop/systemd1",
 120                                                                         "org.freedesktop.systemd1.Manager",
 121                                                                         "GetUnitByPID",
 122                                                                         -1, "(o)", "(u)", (unsigned int)pid)
 123                                                                                 .get("(o)", &service);
 124                         servicesToStop.insert(service);
 125                 } catch (runtime::Exception &e) {
 126                         INFO(SINK, "Killing process: " + std::to_string(pid));
 127                         ::kill(pid, SIGKILL);
 128                 }
 129         }
 130
 131         for (const std::string& service : servicesToStop) {
 132                 INFO(SINK, "Stopping service: " + service);
 133                 systemDBus.methodcall("org.freedesktop.systemd1",
 134                                                                 service,
 135                                                                 "org.freedesktop.systemd1.Unit",
 136                                                                 "Stop",
 137                                                                 -1, "", "(s)", "flush");
 138         }
 139 }
 140
 141 void showProgressUI(const std::string type)
 142 {
 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: " + std::string(e.what()));
 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(VCONFKEY_ODE_FAST_ENCRYPTION, &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(VCONFKEY_ODE_FAST_ENCRYPTION, value);
 194 }
 195
 196 void unmountInternalStorage(const std::string& source)
 197 {
 198         while(true) {
 199                 auto mntPaths = findMountPointsByDevice(source);
 200                 if(mntPaths.empty())
 201                         break;
 202
 203                 bool unmounted = true;
 204                 for(const auto& path : mntPaths) {
 205                         INFO(SINK, "Unmounting " + path);
 206                         if (::umount(path.c_str()) == -1) {
 207                                 // If it's busy or was already unmounted ignore the error
 208                                 if (errno != EBUSY && errno != EINVAL) {
 209                                         throw runtime::Exception("umount() error: " + runtime::GetSystemErrorMessage());
 210                                 }
 211                                 unmounted = false;
 212                         }
 213                 }
 214                 if (!unmounted)
 215                         stopDependedSystemdServices();
 216         }
 217 }
 218
 219 }
 220
 221 InternalEncryptionServer::InternalEncryptionServer(ServerContext& srv,
 222                                                                                                    KeyServer& key) :
 223         server(srv),
 224         keyServer(key)
 225 {
 226         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::setMountPassword)(std::string));
 227         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::mount)());
 228         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::umount)());
 229         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::encrypt)(std::string, unsigned int));
 230         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::decrypt)(std::string));
 231         server.expose(this, "", (int)(InternalEncryptionServer::isPasswordInitialized)());
 232         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::initPassword)(std::string));
 233         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::cleanPassword)(std::string));
 234         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::changePassword)(std::string, std::string));
 235         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::verifyPassword)(std::string));
 236         server.expose(this, "", (int)(InternalEncryptionServer::getState)());
 237         server.expose(this, "", (unsigned int)(InternalEncryptionServer::getSupportedOptions)());
 238         server.expose(this, "", (std::string)(InternalEncryptionServer::getDevicePath)());
 239
 240         server.createNotification("InternalEncryptionServer::mount");
 241
 242         std::string source = findDevPath();
 243
 244         engine.reset(new INTERNAL_ENGINE(
 245                 source, INTERNAL_PATH,
 246                 ProgressBar([](int v) {
 247                         ::vconf_set_str(VCONFKEY_ODE_ENCRYPT_PROGRESS,
 248                                                         std::to_string(v).c_str());
 249                 })
 250         ));
 251 }
 252
 253 InternalEncryptionServer::~InternalEncryptionServer()
 254 {
 255 }
 256
 257 int InternalEncryptionServer::setMountPassword(const std::string& password)
 258 {
 259         return keyServer.get(engine->getSource(), password, mountKey);
 260 }
 261
 262 int InternalEncryptionServer::mount()
 263 {
 264         if (mountKey.empty()) {
 265                 ERROR(SINK, "You need to call set_mount_password() first.");
 266                 return error::NoData;
 267         }
 268
 269         BinaryData key = mountKey;
 270         mountKey.clear();
 271
 272         if (getState() != State::Encrypted) {
 273                 INFO(SINK, "Cannot mount, SD partition's state incorrect.");
 274                 return error::NoSuchDevice;
 275         }
 276
 277         if (engine->isMounted()) {
 278                 INFO(SINK, "Partition already mounted.");
 279                 return error::None;
 280         }
 281
 282         INFO(SINK, "Mounting internal storage.");
 283         try {
 284                 engine->mount(key, getOptions());
 285
 286                 server.notify("InternalEncryptionServer::mount");
 287
 288                 runtime::File("/tmp/.lazy_mount").create(O_WRONLY);
 289                 runtime::File("/tmp/.unlock_mnt").create(O_WRONLY);
 290         } catch (runtime::Exception &e) {
 291                 ERROR(SINK, "Mount failed: " + std::string(e.what()));
 292                 return error::Unknown;
 293         }
 294
 295         return error::None;
 296 }
 297
 298 int InternalEncryptionServer::umount()
 299 {
 300         if (getState() != State::Encrypted) {
 301                 ERROR(SINK, "Cannot umount, partition's state incorrect.");
 302                 return error::NoSuchDevice;
 303         }
 304
 305         if (!engine->isMounted()) {
 306                 INFO(SINK, "Partition already umounted.");
 307                 return error::None;
 308         }
 309
 310         INFO(SINK, "Closing all processes using internal storage.");
 311         try {
 312                 stopDependedSystemdServices();
 313                 INFO(SINK, "Umounting internal storage.");
 314                 engine->umount();
 315         } catch (runtime::Exception &e) {
 316                 ERROR(SINK, "Umount failed: " + std::string(e.what()));
 317                 return error::Unknown;
 318         }
 319
 320         return error::None;
 321 }
 322
 323 int InternalEncryptionServer::encrypt(const std::string& password, unsigned int options)
 324 {
 325         if (getState() != State::Unencrypted) {
 326                 ERROR(SINK, "Cannot encrypt, partition's state incorrect.");
 327                 return error::NoSuchDevice;
 328         }
 329
 330         BinaryData masterKey;
 331         int ret = keyServer.get(engine->getSource(), password, masterKey);
 332         if (ret != error::None)
 333                 return ret;
 334
 335         auto encryptWorker = [masterKey, options, this]() {
 336                 try {
 337                         std::string source = engine->getSource();
 338                         auto mntPaths = findMountPointsByDevice(source);
 339
 340                         if (!mntPaths.empty()) {
 341                                 INFO(SINK, "Closing all known systemd services that might be using internal storage.");
 342                                 stopKnownSystemdServices();
 343                                 INFO(SINK, "Closing all processes using internal storage.");
 344                                 stopDependedSystemdServices();
 345
 346                                 INFO(SINK, "Unmounting internal storage.");
 347                                 unmountInternalStorage(source);
 348                         }
 349
 350                         showProgressUI("Encrypting");
 351
 352                         INFO(SINK, "Encryption started.");
 353                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "error_partially_encrypted");
 354                         engine->encrypt(masterKey, options);
 355                         setOptions(options & getSupportedOptions());
 356
 357                         INFO(SINK, "Encryption completed.");
 358                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "encrypted");
 359                         server.notify("InternalEncryptionServer::mount");
 360
 361                         INFO(SINK, "Syncing disk and rebooting.");
 362                         ::sync();
 363                         ::reboot(RB_AUTOBOOT);
 364                 } catch (runtime::Exception &e) {
 365                         ERROR(SINK, "Encryption failed: " + std::string(e.what()));
 366                 }
 367         };
 368
 369         std::thread asyncWork(encryptWorker);
 370         asyncWork.detach();
 371
 372         return error::None;
 373 }
 374
 375 int InternalEncryptionServer::decrypt(const std::string& password)
 376 {
 377         if (getState() != State::Encrypted) {
 378                 ERROR(SINK, "Cannot decrypt, partition's state incorrect.");
 379                 return error::NoSuchDevice;
 380         }
 381
 382         BinaryData masterKey;
 383         int ret = keyServer.get(engine->getSource(), password, masterKey);
 384         if (ret != error::None)
 385                 return ret;
 386
 387         auto decryptWorker = [masterKey, this]() {
 388                 try {
 389                         if (engine->isMounted()) {
 390                                 INFO(SINK, "Closing all known systemd services that might be using internal storage.");
 391                                 stopKnownSystemdServices();
 392                                 INFO(SINK, "Closing all processes using internal storage.");
 393                                 stopDependedSystemdServices();
 394
 395                                 INFO(SINK, "Umounting internal storage.");
 396                                 while (1) {
 397                                         try {
 398                                                 engine->umount();
 399                                                 break;
 400                                         } catch (runtime::Exception& e) {
 401                                                 stopDependedSystemdServices();
 402                                         }
 403                                 }
 404                         }
 405
 406                         showProgressUI("Decrypting");
 407
 408                         INFO(SINK, "Decryption started.");
 409                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "error_partially_encrypted");
 410                         engine->decrypt(masterKey, getOptions());
 411
 412                         INFO(SINK, "Decryption complete.");
 413                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "unencrypted");
 414
 415                         INFO(SINK, "Syncing disk and rebooting.");
 416                         ::sync();
 417                         ::reboot(RB_AUTOBOOT);
 418                 } catch (runtime::Exception &e) {
 419                         ERROR(SINK, "Decryption failed: " + std::string(e.what()));
 420                 }
 421         };
 422
 423         std::thread asyncWork(decryptWorker);
 424         asyncWork.detach();
 425
 426         return error::None;
 427 }
 428
 429 int InternalEncryptionServer::recovery()
 430 {
 431         if (getState() == State::Unencrypted) {
 432                 return error::NoSuchDevice;
 433         }
 434
 435         //TODO
 436         runtime::Process proc(PROG_FACTORY_RESET, wipeCommand);
 437         if (proc.execute() == -1) {
 438                 ERROR(SINK, "Failed to launch factory-reset");
 439                 return error::WrongPassword;
 440         }
 441
 442         return error::None;
 443 }
 444
 445 int InternalEncryptionServer::isPasswordInitialized()
 446 {
 447         return keyServer.isInitialized(engine->getSource());
 448 }
 449
 450 int InternalEncryptionServer::initPassword(const std::string& password)
 451 {
 452         return keyServer.init(engine->getSource(), password, Key::DEFAULT_256BIT);
 453 }
 454
 455 int InternalEncryptionServer::cleanPassword(const std::string& password)
 456 {
 457         return keyServer.remove(engine->getSource(), password);
 458 }
 459
 460 int InternalEncryptionServer::changePassword(const std::string& oldPassword,
 461                                                                                 const std::string& newPassword)
 462 {
 463         return keyServer.changePassword(engine->getSource(), oldPassword, newPassword);
 464 }
 465
 466 int InternalEncryptionServer::verifyPassword(const std::string& password)
 467 {
 468         return keyServer.verifyPassword(engine->getSource(), password);
 469 }
 470
 471 int InternalEncryptionServer::getState()
 472 {
 473         char *value = ::vconf_get_str(VCONFKEY_ODE_CRYPTO_STATE);
 474         if (value == NULL) {
 475                 throw runtime::Exception("Failed to get vconf value.");
 476         }
 477
 478         std::string valueStr(value);
 479         free(value);
 480
 481         if (valueStr == "encrypted") {
 482                 return State::Encrypted;
 483         } else if (valueStr == "unencrypted") {
 484                 return State::Unencrypted;
 485         } else {
 486                 return State::Corrupted;
 487         }
 488 }
 489
 490 unsigned int InternalEncryptionServer::getSupportedOptions()
 491 {
 492         return engine->getSupportedOptions();
 493 }
 494
 495 std::string InternalEncryptionServer::getDevicePath() const
 496 {
 497         return engine->getSource();
 498 }
 499
 500 } // namespace ode