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                 if (ret != 0) {
  86                         ERROR(SINK, "Failed to kill process " + std::to_string(pid));
  87                 }
  88     }
  89 }
  90
  91 void showProgressUI(const std::string type) {
  92         runtime::File fileToTouch("/tmp/.ode-progress-internal@" + type);
  93         try {
  94                 fileToTouch.remove();
  95         } catch(runtime::Exception &e) {}
  96         fileToTouch.create(O_WRONLY);
  97 }
  98
  99 unsigned int getOptions()
 100 {
 101         unsigned int result = 0;
 102         int value;
 103
 104         value = 0;
 105         ::vconf_get_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, &value);
 106         if (value) {
 107                 result |= InternalEncryption::Option::IncludeUnusedRegion;
 108         }
 109
 110         return result;
 111 }
 112
 113 void setOptions(unsigned int options)
 114 {
 115         bool value;
 116
 117         if (options & InternalEncryption::Option::IncludeUnusedRegion) {
 118                 value = true;
 119         } else {
 120                 value = false;
 121         }
 122         ::vconf_set_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, value);
 123 }
 124
 125 }
 126
 127 InternalEncryption::InternalEncryption(ODEControlContext& ctx) :
 128         context(ctx)
 129 {
 130         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::setMountPassword)(std::string));
 131         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::mount)());
 132         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::umount)());
 133         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::encrypt)(std::string, unsigned int));
 134         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::decrypt)(std::string));
 135         context.expose(this, "", (int)(InternalEncryption::isPasswordInitialized)());
 136         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::initPassword)(std::string));
 137         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::cleanPassword)(std::string));
 138         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::changePassword)(std::string, std::string));
 139         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::verifyPassword)(std::string));
 140         context.expose(this, "", (int)(InternalEncryption::getState)());
 141         context.expose(this, "", (unsigned int)(InternalEncryption::getSupportedOptions)());
 142
 143         context.createNotification("InternalEncryption::mount");
 144
 145         std::string source = INTERNAL_DEV_PATH "/" INTERNAL_DEV_NAME;
 146         try {
 147                 runtime::DirectoryIterator iter(INTERNAL_DEV_PATH), end;
 148
 149                 while (iter != end) {
 150                         const std::string& path = (*iter).getPath();
 151                         std::string name = path.substr(path.rfind('/') + 1);
 152                         std::string upper;
 153                         upper.reserve(name.size());
 154                         for (char c : name) {
 155                                 upper += std::toupper(c);
 156                         }
 157                         if (upper == INTERNAL_DEV_NAME) {
 158                                 source = path;
 159                                 break;
 160                         }
 161                         ++iter;
 162                 }
 163         } catch (runtime::Exception &e) {}
 164
 165         engine.reset(new INTERNAL_ENGINE(
 166                 source, INTERNAL_PATH,
 167                 ProgressBar([](int v) {
 168                         ::vconf_set_str(VCONFKEY_ODE_ENCRYPT_PROGRESS,
 169                                                         std::to_string(v).c_str());
 170                 })
 171         ));
 172 }
 173
 174 InternalEncryption::~InternalEncryption()
 175 {
 176 }
 177
 178 int InternalEncryption::setMountPassword(const std::string& password)
 179 {
 180         KeyManager::data pwData(password.begin(), password.end());
 181         KeyManager keyManager(engine->getKeyMeta());
 182         if (!keyManager.verifyPassword(pwData)) {
 183                 return -2;
 184         }
 185
 186         ode::mountKey = keyManager.getMasterKey(pwData);
 187
 188         return 0;
 189 }
 190
 191 int InternalEncryption::mount()
 192 {
 193         if (getState() != State::Encrypted) {
 194                 return -1;
 195         }
 196
 197     if (engine->isMounted()) {
 198                 INFO(SINK, "Already mounted");
 199                 return 0;
 200         }
 201
 202         engine->mount(mountKey, getOptions());
 203         mountKey.clear();
 204
 205         context.notify("InternalEncryption::mount");
 206
 207         runtime::File("/tmp/.lazy_mount").create(O_WRONLY);
 208         runtime::File("/tmp/.unlock_mnt").create(O_WRONLY);
 209
 210         return 0;
 211 }
 212
 213 int InternalEncryption::umount()
 214 {
 215         if (getState() != State::Encrypted) {
 216                 return -1;
 217         }
 218
 219         if (!engine->isMounted()) {
 220                 INFO(SINK, "Already umounted");
 221                 return 0;
 222         }
 223
 224         INFO(SINK, "Close all processes that use internal storage...");
 225         stopDependedSystemdServices();
 226         killDependedProcesses();
 227         INFO(SINK, "Umount internal storage...");
 228         engine->umount();
 229
 230         return 0;
 231 }
 232
 233 int InternalEncryption::encrypt(const std::string& password, unsigned int options)
 234 {
 235         if (getState() != State::Unencrypted) {
 236                 return -1;
 237         }
 238
 239         KeyManager::data pwData(password.begin(), password.end());
 240         KeyManager keyManager(engine->getKeyMeta());
 241
 242         if (!keyManager.verifyPassword(pwData)) {
 243                 return -2;
 244         }
 245
 246         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 247         auto encryptWorker = [MasterKey, options, this]() {
 248                 try {
 249                         INFO(SINK, "Close all processes that use internal storage...");
 250                         stopDependedSystemdServices();
 251                         killDependedProcesses();
 252                         INFO(SINK, "Umount internal storage...");
 253                         while (::umount(INTERNAL_PATH) == -1) {
 254                                 if (errno != EBUSY) {
 255                                         throw runtime::Exception("Umount error - " + std::to_string(errno));
 256                                 }
 257                                 killDependedProcesses();
 258                         }
 259
 260                         showProgressUI("Encrypting");
 261
 262                         INFO(SINK, "Encryption started...");
 263                         engine->encrypt(MasterKey, options);
 264                         setOptions(options & getSupportedOptions());
 265                         INFO(SINK, "Sync disk...");
 266                         sync();
 267                         INFO(SINK, "Encryption completed");
 268
 269                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "encrypted");
 270                         context.notify("InternalEncryption::mount");
 271                         ::reboot(RB_AUTOBOOT);
 272                 } catch (runtime::Exception &e) {
 273                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 274                         ERROR(SINK, "Encryption failed - " + std::string(e.what()));
 275                 }
 276         };
 277
 278         std::thread asyncWork(encryptWorker);
 279         asyncWork.detach();
 280
 281         return 0;
 282 }
 283
 284 int InternalEncryption::decrypt(const std::string& password)
 285 {
 286         if (getState() != State::Encrypted) {
 287                 return -1;
 288         }
 289
 290         KeyManager::data pwData(password.begin(), password.end());
 291         KeyManager keyManager(engine->getKeyMeta());
 292
 293         if (!keyManager.verifyPassword(pwData)) {
 294                 return -2;
 295         }
 296
 297         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 298         auto decryptWorker = [MasterKey, this]() {
 299                 try {
 300                         INFO(SINK, "Umount internal storage...");
 301                         stopDependedSystemdServices();
 302                         killDependedProcesses();
 303                         INFO(SINK, "Umount internal storage...");
 304                         while (1) {
 305                                 try {
 306                                         engine->umount();
 307                                         break;
 308                                 } catch (runtime::Exception& e) {
 309                                         killDependedProcesses();
 310                                 }
 311                         }
 312
 313                         showProgressUI("Decrypting");
 314
 315                         INFO(SINK, "Decryption started...");
 316                         engine->decrypt(MasterKey, getOptions());
 317                         INFO(SINK, "Sync disk...");
 318                         sync();
 319                         INFO(SINK, "Decryption completed");
 320
 321                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "unencrypted");
 322                         ::reboot(RB_AUTOBOOT);
 323                 } catch (runtime::Exception &e) {
 324                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 325                         ERROR(SINK, "Decryption failed - " + std::string(e.what()));
 326                 }
 327         };
 328
 329         std::thread asyncWork(decryptWorker);
 330         asyncWork.detach();
 331
 332         return 0;
 333 }
 334
 335 int InternalEncryption::recovery()
 336 {
 337         if (getState() != State::Unencrypted) {
 338                 return -1;
 339         }
 340
 341         //TODO
 342         runtime::Process proc(PROG_FACTORY_RESET, wipeCommand);
 343         if (proc.execute() == -1) {
 344                 ERROR(SINK, "Failed to launch factory-reset");
 345                 return -2;
 346         }
 347
 348         return 0;
 349 }
 350
 351 int InternalEncryption::isPasswordInitialized()
 352 {
 353         if (engine->isKeyMetaSet()) {
 354                 return 1;
 355         }
 356         return 0;
 357 }
 358
 359 int InternalEncryption::initPassword(const std::string& password)
 360 {
 361         KeyManager::data pwData(password.begin(), password.end());
 362         KeyManager keyManager;
 363
 364         keyManager.initPassword(pwData);
 365         engine->setKeyMeta(keyManager.serialize());
 366         return 0;
 367 }
 368
 369 int InternalEncryption::cleanPassword(const std::string& password)
 370 {
 371         KeyManager::data pwData(password.begin(), password.end());
 372         KeyManager keyManager(engine->getKeyMeta());
 373
 374         if (!keyManager.verifyPassword(pwData)) {
 375                 return -2;
 376         }
 377
 378         engine->clearKeyMeta();
 379         return 0;
 380 }
 381
 382 int InternalEncryption::changePassword(const std::string& oldPassword,
 383                                                                                 const std::string& newPassword)
 384 {
 385         KeyManager::data oldPwData(oldPassword.begin(), oldPassword.end());
 386         KeyManager::data newPwData(newPassword.begin(), newPassword.end());
 387         KeyManager keyManager(engine->getKeyMeta());
 388
 389         if (!keyManager.verifyPassword(oldPwData)) {
 390                 return -2;
 391         }
 392
 393         keyManager.changePassword(oldPwData, newPwData);
 394         engine->setKeyMeta(keyManager.serialize());
 395
 396         return 0;
 397 }
 398
 399 int InternalEncryption::verifyPassword(const std::string& password)
 400 {
 401         KeyManager::data pwData(password.begin(), password.end());
 402         KeyManager keyManager(engine->getKeyMeta());
 403
 404         if (keyManager.verifyPassword(pwData)) {
 405                 return 1;
 406         }
 407         return 0;
 408 }
 409
 410 int InternalEncryption::getState()
 411 {
 412         char *value = ::vconf_get_str(INTERNAL_STATE_VCONF_KEY);
 413         if (value == NULL) {
 414                 throw runtime::Exception("Failed to get vconf value");
 415         }
 416
 417         std::string valueStr(value);
 418         free(value);
 419
 420         if (valueStr == "encrypted") {
 421                 return State::Encrypted;
 422         } else if (valueStr == "unencrypted") {
 423                 return State::Unencrypted;
 424         } else {
 425                 return State::Corrupted;
 426         }
 427
 428         return 0;
 429 }
 430
 431 unsigned int InternalEncryption::getSupportedOptions()
 432 {
 433         return engine->getSupportedOptions();
 434 }
 435
 436 } // namespace ode