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 }
 197
 198 InternalEncryptionServer::InternalEncryptionServer(ServerContext& srv,
 199                                                                                                    KeyServer& key) :
 200         server(srv),
 201         keyServer(key)
 202 {
 203         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::setMountPassword)(std::string));
 204         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::mount)());
 205         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::umount)());
 206         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::encrypt)(std::string, unsigned int));
 207         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::decrypt)(std::string));
 208         server.expose(this, "", (int)(InternalEncryptionServer::isPasswordInitialized)());
 209         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::initPassword)(std::string));
 210         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::cleanPassword)(std::string));
 211         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::changePassword)(std::string, std::string));
 212         server.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryptionServer::verifyPassword)(std::string));
 213         server.expose(this, "", (int)(InternalEncryptionServer::getState)());
 214         server.expose(this, "", (unsigned int)(InternalEncryptionServer::getSupportedOptions)());
 215         server.expose(this, "", (std::string)(InternalEncryptionServer::getDevicePath)());
 216
 217         server.createNotification("InternalEncryptionServer::mount");
 218
 219         std::string source = findDevPath();
 220
 221         engine.reset(new INTERNAL_ENGINE(
 222                 source, INTERNAL_PATH,
 223                 ProgressBar([](int v) {
 224                         ::vconf_set_str(VCONFKEY_ODE_ENCRYPT_PROGRESS,
 225                                                         std::to_string(v).c_str());
 226                 })
 227         ));
 228 }
 229
 230 InternalEncryptionServer::~InternalEncryptionServer()
 231 {
 232 }
 233
 234 int InternalEncryptionServer::setMountPassword(const std::string& password)
 235 {
 236         return keyServer.get(engine->getSource(), password, mountKey);
 237 }
 238
 239 int InternalEncryptionServer::mount()
 240 {
 241         if (mountKey.empty()) {
 242                 ERROR(SINK, "You need to call set_mount_password() first.");
 243                 return error::NoData;
 244         }
 245
 246         BinaryData key = mountKey;
 247         mountKey.clear();
 248
 249         if (getState() != State::Encrypted) {
 250                 INFO(SINK, "Cannot mount, SD partition's state incorrect.");
 251                 return error::NoSuchDevice;
 252         }
 253
 254         if (engine->isMounted()) {
 255                 INFO(SINK, "Partition already mounted.");
 256                 return error::None;
 257         }
 258
 259         INFO(SINK, "Mounting internal storage.");
 260         try {
 261                 engine->mount(key, getOptions());
 262
 263                 server.notify("InternalEncryptionServer::mount");
 264
 265                 runtime::File("/tmp/.lazy_mount").create(O_WRONLY);
 266                 runtime::File("/tmp/.unlock_mnt").create(O_WRONLY);
 267         } catch (runtime::Exception &e) {
 268                 ERROR(SINK, "Mount failed: " + std::string(e.what()));
 269                 return error::Unknown;
 270         }
 271
 272         return error::None;
 273 }
 274
 275 int InternalEncryptionServer::umount()
 276 {
 277         if (getState() != State::Encrypted) {
 278                 ERROR(SINK, "Cannot umount, partition's state incorrect.");
 279                 return error::NoSuchDevice;
 280         }
 281
 282         if (!engine->isMounted()) {
 283                 INFO(SINK, "Partition already umounted.");
 284                 return error::None;
 285         }
 286
 287         INFO(SINK, "Closing all processes using internal storage.");
 288         try {
 289                 stopDependedSystemdServices();
 290                 INFO(SINK, "Umounting internal storage.");
 291                 engine->umount();
 292         } catch (runtime::Exception &e) {
 293                 ERROR(SINK, "Umount failed: " + std::string(e.what()));
 294                 return error::Unknown;
 295         }
 296
 297         return error::None;
 298 }
 299
 300 int InternalEncryptionServer::encrypt(const std::string& password, unsigned int options)
 301 {
 302         if (getState() != State::Unencrypted) {
 303                 ERROR(SINK, "Cannot encrypt, partition's state incorrect.");
 304                 return error::NoSuchDevice;
 305         }
 306
 307         BinaryData masterKey;
 308         int ret = keyServer.get(engine->getSource(), password, masterKey);
 309         if (ret != error::None)
 310                 return ret;
 311
 312         auto encryptWorker = [masterKey, options, this]() {
 313                 try {
 314                         std::string source = engine->getSource();
 315                         std::string mntPath = findMountPointByDevice(source);
 316
 317                         if (!mntPath.empty()) {
 318                                 INFO(SINK, "Closing all known systemd services that might be using internal storage.");
 319                                 stopKnownSystemdServices();
 320                                 INFO(SINK, "Closing all processes using internal storage.");
 321                                 stopDependedSystemdServices();
 322                         }
 323
 324                         while (!mntPath.empty()) {
 325                                 INFO(SINK, "Umounting internal storage.");
 326                                 while (::umount(mntPath.c_str()) == -1) {
 327                                         if (errno != EBUSY) {
 328                                                 throw runtime::Exception("Umount error: " + runtime::GetSystemErrorMessage());
 329                                         }
 330                                         stopDependedSystemdServices();
 331                                 }
 332                                 mntPath = findMountPointByDevice(source);
 333                         }
 334
 335                         showProgressUI("Encrypting");
 336
 337                         INFO(SINK, "Encryption started.");
 338                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "error_partially_encrypted");
 339                         engine->encrypt(masterKey, options);
 340                         setOptions(options & getSupportedOptions());
 341
 342                         INFO(SINK, "Encryption completed.");
 343                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "encrypted");
 344                         server.notify("InternalEncryptionServer::mount");
 345
 346                         INFO(SINK, "Syncing disk and rebooting.");
 347                         ::sync();
 348                         ::reboot(RB_AUTOBOOT);
 349                 } catch (runtime::Exception &e) {
 350                         ERROR(SINK, "Encryption failed: " + std::string(e.what()));
 351                 }
 352         };
 353
 354         std::thread asyncWork(encryptWorker);
 355         asyncWork.detach();
 356
 357         return error::None;
 358 }
 359
 360 int InternalEncryptionServer::decrypt(const std::string& password)
 361 {
 362         if (getState() != State::Encrypted) {
 363                 ERROR(SINK, "Cannot decrypt, partition's state incorrect.");
 364                 return error::NoSuchDevice;
 365         }
 366
 367         BinaryData masterKey;
 368         int ret = keyServer.get(engine->getSource(), password, masterKey);
 369         if (ret != error::None)
 370                 return ret;
 371
 372         auto decryptWorker = [masterKey, this]() {
 373                 try {
 374                         if (engine->isMounted()) {
 375                                 INFO(SINK, "Closing all known systemd services that might be using internal storage.");
 376                                 stopKnownSystemdServices();
 377                                 INFO(SINK, "Closing all processes using internal storage.");
 378                                 stopDependedSystemdServices();
 379
 380                                 INFO(SINK, "Umounting internal storage.");
 381                                 while (1) {
 382                                         try {
 383                                                 engine->umount();
 384                                                 break;
 385                                         } catch (runtime::Exception& e) {
 386                                                 stopDependedSystemdServices();
 387                                         }
 388                                 }
 389                         }
 390
 391                         showProgressUI("Decrypting");
 392
 393                         INFO(SINK, "Decryption started.");
 394                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "error_partially_encrypted");
 395                         engine->decrypt(masterKey, getOptions());
 396
 397                         INFO(SINK, "Decryption complete.");
 398                         ::vconf_set_str(VCONFKEY_ODE_CRYPTO_STATE, "unencrypted");
 399
 400                         INFO(SINK, "Syncing disk and rebooting.");
 401                         ::sync();
 402                         ::reboot(RB_AUTOBOOT);
 403                 } catch (runtime::Exception &e) {
 404                         ERROR(SINK, "Decryption failed: " + std::string(e.what()));
 405                 }
 406         };
 407
 408         std::thread asyncWork(decryptWorker);
 409         asyncWork.detach();
 410
 411         return error::None;
 412 }
 413
 414 int InternalEncryptionServer::recovery()
 415 {
 416         if (getState() == State::Unencrypted) {
 417                 return error::NoSuchDevice;
 418         }
 419
 420         //TODO
 421         runtime::Process proc(PROG_FACTORY_RESET, wipeCommand);
 422         if (proc.execute() == -1) {
 423                 ERROR(SINK, "Failed to launch factory-reset");
 424                 return error::WrongPassword;
 425         }
 426
 427         return error::None;
 428 }
 429
 430 int InternalEncryptionServer::isPasswordInitialized()
 431 {
 432         return keyServer.isInitialized(engine->getSource());
 433 }
 434
 435 int InternalEncryptionServer::initPassword(const std::string& password)
 436 {
 437         return keyServer.init(engine->getSource(), password, Key::DEFAULT_256BIT);
 438 }
 439
 440 int InternalEncryptionServer::cleanPassword(const std::string& password)
 441 {
 442         return keyServer.remove(engine->getSource(), password);
 443 }
 444
 445 int InternalEncryptionServer::changePassword(const std::string& oldPassword,
 446                                                                                 const std::string& newPassword)
 447 {
 448         return keyServer.changePassword(engine->getSource(), oldPassword, newPassword);
 449 }
 450
 451 int InternalEncryptionServer::verifyPassword(const std::string& password)
 452 {
 453         return keyServer.verifyPassword(engine->getSource(), password);
 454 }
 455
 456 int InternalEncryptionServer::getState()
 457 {
 458         char *value = ::vconf_get_str(VCONFKEY_ODE_CRYPTO_STATE);
 459         if (value == NULL) {
 460                 throw runtime::Exception("Failed to get vconf value.");
 461         }
 462
 463         std::string valueStr(value);
 464         free(value);
 465
 466         if (valueStr == "encrypted") {
 467                 return State::Encrypted;
 468         } else if (valueStr == "unencrypted") {
 469                 return State::Unencrypted;
 470         } else {
 471                 return State::Corrupted;
 472         }
 473 }
 474
 475 unsigned int InternalEncryptionServer::getSupportedOptions()
 476 {
 477         return engine->getSupportedOptions();
 478 }
 479
 480 std::string InternalEncryptionServer::getDevicePath() const
 481 {
 482         return engine->getSource();
 483 }
 484
 485 } // namespace ode