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 <klay/process.h>
  25 #include <klay/file-user.h>
  26 #include <klay/filesystem.h>
  27 #include <klay/dbus/connection.h>
  28 #include <klay/audit/logger.h>
  29
  30 #include "vconf.h"
  31 #include "progress-bar.h"
  32 #include "engine/encryption/dmcrypt-engine.h"
  33 #include "key-manager/key-manager.h"
  34
  35 #include "rmi/internal-encryption.h"
  36
  37 #define INTERNAL_ENGINE DMCryptEngine
  38 #define INTERNAL_DEV    "/dev/mmcblk0p25"
  39 #define INTERNAL_PATH   "/opt/usr"
  40 #define INTERNAL_STATE_VCONF_KEY                                        VCONFKEY_ODE_CRYPTO_STATE
  41 #define INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY      VCONFKEY_ODE_FAST_ENCRYPTION
  42
  43 #define PRIVILEGE_PLATFORM "http://tizen.org/privilege/internal/default/platform"
  44
  45 const std::string PROG_FACTORY_RESET = "/usr/bin/dbus-send";
  46 const std::vector<std::string> wipeCommand = {
  47     PROG_FACTORY_RESET,
  48     "--system",
  49     "--type=signal",
  50     "--print-reply",
  51     "--dest=com.samsung.factoryreset",
  52     "/com/samsung/factoryreset",
  53     "com.samsung.factoryreset.start.setting"
  54 };
  55
  56 namespace ode {
  57
  58 namespace {
  59
  60 std::unique_ptr<INTERNAL_ENGINE> engine;
  61
  62 void stopDependedSystemdServices()
  63 {
  64         dbus::Connection& systemDBus = dbus::Connection::getSystem();
  65         std::set<std::string> servicesToStop;
  66
  67         for (pid_t pid : runtime::FileUser::getList(INTERNAL_PATH, true)) {
  68                 try {
  69                         char *service;
  70                         systemDBus.methodcall("org.freedesktop.systemd1",
  71                                                                         "/org/freedesktop/systemd1",
  72                                                                         "org.freedesktop.systemd1.Manager",
  73                                                                         "GetUnitByPID",
  74                                                                         -1, "(o)", "(u)", (unsigned int)pid)
  75                                                                                 .get("(o)", &service);
  76                         servicesToStop.insert(service);
  77                 } catch (runtime::Exception &e) {
  78                         INFO("Close process - " + std::to_string(pid));
  79                         ::kill(pid, SIGKILL);
  80                 }
  81         }
  82
  83         for (const std::string& service : servicesToStop) {
  84                 INFO("Close service - " + service);
  85                 systemDBus.methodcall("org.freedesktop.systemd1",
  86                                                                 service,
  87                                                                 "org.freedesktop.systemd1.Unit",
  88                                                                 "Stop",
  89                                                                 -1, "", "(s)", "flush");
  90         }
  91 }
  92
  93 void showProgressUI(const std::string type) {
  94         std::vector<std::string> args = {
  95                 "ode", "progress", type, "Internal"
  96         };
  97
  98         runtime::Process proc("/usr/bin/ode", args);
  99         proc.execute();
 100 }
 101
 102 unsigned int getOptions()
 103 {
 104         unsigned int result = 0;
 105         int value;
 106
 107         value = 0;
 108         ::vconf_get_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, &value);
 109         if (value) {
 110                 result |= InternalEncryption::Option::IncludeUnusedRegion;
 111         }
 112
 113         return result;
 114 }
 115
 116 void setOptions(unsigned int options)
 117 {
 118         bool value;
 119
 120         if (options & InternalEncryption::Option::IncludeUnusedRegion) {
 121                 value = true;
 122         } else {
 123                 value = false;
 124         }
 125         ::vconf_set_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, value);
 126 }
 127
 128 }
 129
 130 InternalEncryption::InternalEncryption(ODEControlContext& ctx) :
 131         context(ctx)
 132 {
 133         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::mount)(std::string));
 134         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::umount)());
 135         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::encrypt)(std::string, unsigned int));
 136         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::decrypt)(std::string));
 137         context.expose(this, "", (int)(InternalEncryption::isPasswordInitialized)());
 138         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::initPassword)(std::string));
 139         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::cleanPassword)(std::string));
 140         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::changePassword)(std::string, std::string));
 141         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::verifyPassword)(std::string));
 142         context.expose(this, "", (int)(InternalEncryption::getState)());
 143         context.expose(this, "", (unsigned int)(InternalEncryption::getSupportedOptions)());
 144
 145         engine.reset(new INTERNAL_ENGINE(
 146                 INTERNAL_DEV, INTERNAL_PATH,
 147                 ProgressBar([](int v) {
 148                         ::vconf_set_str(VCONFKEY_ODE_ENCRYPT_PROGRESS,
 149                                                         std::to_string(v).c_str());
 150                 })
 151         ));
 152 }
 153
 154 InternalEncryption::~InternalEncryption()
 155 {
 156 }
 157
 158 int InternalEncryption::mount(const std::string& password)
 159 {
 160         if (getState() != State::Encrypted) {
 161                 return -1;
 162         }
 163
 164         KeyManager::data pwData(password.begin(), password.end());
 165         KeyManager keyManager(engine->getKeyMeta());
 166
 167         if (!keyManager.verifyPassword(pwData)) {
 168                 return -2;
 169         }
 170
 171         engine->mount(keyManager.getMasterKey(pwData), getOptions());
 172         return 0;
 173 }
 174
 175 int InternalEncryption::umount()
 176 {
 177         if (getState() != State::Encrypted) {
 178                 return -1;
 179         }
 180
 181         INFO("Close all processes using internal storage...");
 182         stopDependedSystemdServices();
 183         INFO("Umount internal storage...");
 184         engine->umount();
 185
 186         return 0;
 187 }
 188
 189 int InternalEncryption::encrypt(const std::string& password, unsigned int options)
 190 {
 191         if (getState() != State::Unencrypted) {
 192                 return -1;
 193         }
 194
 195         KeyManager::data pwData(password.begin(), password.end());
 196         KeyManager keyManager(engine->getKeyMeta());
 197
 198         if (!keyManager.verifyPassword(pwData)) {
 199                 return -2;
 200         }
 201
 202         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 203         auto encryptWorker = [MasterKey, options, this]() {
 204                 try {
 205                         showProgressUI("Encrypting");
 206
 207                         INFO("Close all processes using internal storage...");
 208                         stopDependedSystemdServices();
 209                         INFO("Umount internal storage...");
 210                         while (::umount(INTERNAL_PATH) == -1) {
 211                                 if (errno != EBUSY) {
 212                                         throw runtime::Exception("Umount error - " + std::to_string(errno));
 213                                 }
 214                                 stopDependedSystemdServices();
 215                         }
 216
 217                         INFO("Encryption started...");
 218                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 219                         engine->encrypt(MasterKey, options);
 220                         setOptions(options & getSupportedOptions());
 221                         INFO("Sync disk...");
 222                         sync();
 223                         INFO("Encryption completed");
 224
 225                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "encrypted");
 226                 } catch (runtime::Exception &e) {
 227                         ERROR("Encryption failed - " + std::string(e.what()));
 228                 }
 229                 ::reboot(RB_AUTOBOOT);
 230         };
 231
 232         std::thread asyncWork(encryptWorker);
 233         asyncWork.detach();
 234
 235         return 0;
 236 }
 237
 238 int InternalEncryption::decrypt(const std::string& password)
 239 {
 240         if (getState() != State::Encrypted) {
 241                 return -1;
 242         }
 243
 244         KeyManager::data pwData(password.begin(), password.end());
 245         KeyManager keyManager(engine->getKeyMeta());
 246
 247         if (!keyManager.verifyPassword(pwData)) {
 248                 return -2;
 249         }
 250
 251         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 252         auto decryptWorker = [MasterKey, this]() {
 253                 try {
 254                         showProgressUI("Decrypting");
 255
 256                         INFO("Close all processes using internal storage...");
 257                         stopDependedSystemdServices();
 258                         INFO("Umount internal storage...");
 259                         while (1) {
 260                                 try {
 261                                         engine->umount();
 262                                         break;
 263                                 } catch (runtime::Exception& e) {
 264                                         stopDependedSystemdServices();
 265                                 }
 266                         }
 267
 268                         INFO("Decryption started...");
 269                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 270                         engine->decrypt(MasterKey, getOptions());
 271                         INFO("Sync disk...");
 272                         sync();
 273                         INFO("Decryption completed");
 274
 275                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "unencrypted");
 276                 } catch (runtime::Exception &e) {
 277                         ERROR("Decryption failed - " + std::string(e.what()));
 278                 }
 279                 ::reboot(RB_AUTOBOOT);
 280         };
 281
 282         std::thread asyncWork(decryptWorker);
 283         asyncWork.detach();
 284
 285         return 0;
 286 }
 287
 288 int InternalEncryption::recovery()
 289 {
 290         if (getState() != State::Unencrypted) {
 291                 return -1;
 292         }
 293
 294         //TODO
 295         runtime::Process proc(PROG_FACTORY_RESET, wipeCommand);
 296         if (proc.execute() == -1) {
 297                 ERROR("Failed to launch factory-reset");
 298                 return -2;
 299         }
 300
 301         return 0;
 302 }
 303
 304 int InternalEncryption::isPasswordInitialized()
 305 {
 306         if (engine->isKeyMetaSet()) {
 307                 return 1;
 308         }
 309         return 0;
 310 }
 311
 312 int InternalEncryption::initPassword(const std::string& password)
 313 {
 314         KeyManager::data pwData(password.begin(), password.end());
 315         KeyManager keyManager;
 316
 317         keyManager.initPassword(pwData);
 318         engine->setKeyMeta(keyManager.serialize());
 319         return 0;
 320 }
 321
 322 int InternalEncryption::cleanPassword(const std::string& password)
 323 {
 324         KeyManager::data pwData(password.begin(), password.end());
 325         KeyManager keyManager(engine->getKeyMeta());
 326
 327         if (!keyManager.verifyPassword(pwData)) {
 328                 return -2;
 329         }
 330
 331         engine->clearKeyMeta();
 332         return 0;
 333 }
 334
 335 int InternalEncryption::changePassword(const std::string& oldPassword,
 336                                                                                 const std::string& newPassword)
 337 {
 338         KeyManager::data oldPwData(oldPassword.begin(), oldPassword.end());
 339         KeyManager::data newPwData(newPassword.begin(), newPassword.end());
 340         KeyManager keyManager(engine->getKeyMeta());
 341
 342         if (!keyManager.verifyPassword(oldPwData)) {
 343                 return -2;
 344         }
 345
 346         keyManager.changePassword(oldPwData, newPwData);
 347         engine->setKeyMeta(keyManager.serialize());
 348
 349         return 0;
 350 }
 351
 352 int InternalEncryption::verifyPassword(const std::string& password)
 353 {
 354         KeyManager::data pwData(password.begin(), password.end());
 355         KeyManager keyManager(engine->getKeyMeta());
 356
 357         if (keyManager.verifyPassword(pwData)) {
 358                 return 1;
 359         }
 360         return 0;
 361 }
 362
 363 int InternalEncryption::getState()
 364 {
 365         char *value = ::vconf_get_str(INTERNAL_STATE_VCONF_KEY);
 366         if (value == NULL) {
 367                 throw runtime::Exception("Failed to get vconf value");
 368         }
 369
 370         std::string valueStr(value);
 371         free(value);
 372
 373         if (valueStr == "encrypted") {
 374                 return State::Encrypted;
 375         } else if (valueStr == "unencrypted") {
 376                 return State::Unencrypted;
 377         } else {
 378                 return State::Corrupted;
 379         }
 380
 381         return 0;
 382 }
 383
 384 unsigned int InternalEncryption::getSupportedOptions()
 385 {
 386         return engine->getSupportedOptions();
 387 }
 388
 389 } // namespace ode