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