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