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 "engine/dmcrypt-engine.h"
  31 #include "key-manager/key-manager.h"
  32
  33 #include "rmi/internal-encryption.h"
  34
  35 #define INTERNAL_STORAGE_PATH   "/opt/usr"
  36 #define INTERNAL_STATE_VCONF_KEY VCONFKEY_ODE_CRYPTO_STATE
  37 #define INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY VCONFKEY_ODE_FAST_ENCRYPTION
  38
  39 #define PRIVILEGE_PLATFORM "http://tizen.org/privilege/internal/default/platform"
  40
  41 namespace ode {
  42
  43 namespace {
  44
  45 VConfBackend vconfBackend(VCONFKEY_ODE_ENCRYPT_PROGRESS);
  46 ProgressBar progressBar(std::bind(&VConfBackend::update, &vconfBackend, std::placeholders::_1));
  47
  48 DMCryptEngine engine("/dev/mmcblk0p25", INTERNAL_STORAGE_PATH, progressBar);
  49
  50 void stopDependedSystemdServices()
  51 {
  52         dbus::Connection& systemDBus = dbus::Connection::getSystem();
  53         std::set<std::string> servicesToStop;
  54
  55         for (pid_t pid : runtime::FileUser::getList(INTERNAL_STORAGE_PATH, true)) {
  56                 try {
  57                         char *service;
  58                         systemDBus.methodcall("org.freedesktop.systemd1",
  59                                                                         "/org/freedesktop/systemd1",
  60                                                                         "org.freedesktop.systemd1.Manager",
  61                                                                         "GetUnitByPID",
  62                                                                         -1, "(o)", "(u)", (unsigned int)pid)
  63                                                                                 .get("(o)", &service);
  64                         servicesToStop.insert(service);
  65                 } catch (runtime::Exception &e) {
  66                         INFO("Close process - " + std::to_string(pid));
  67                         ::kill(pid, SIGKILL);
  68                 }
  69         }
  70
  71         for (const std::string& service : servicesToStop) {
  72                 INFO("Close service - " + service);
  73                 systemDBus.methodcall("org.freedesktop.systemd1",
  74                                                                 service,
  75                                                                 "org.freedesktop.systemd1.Unit",
  76                                                                 "Stop",
  77                                                                 -1, "", "(s)", "flush");
  78         }
  79 }
  80
  81 void showProgressUI(const std::string type) {
  82         std::vector<std::string> args = {
  83                 "ode", "progress", type, "Internal"
  84         };
  85
  86         runtime::Process proc("/usr/bin/ode", args);
  87         proc.execute();
  88 }
  89
  90 unsigned int getOptions()
  91 {
  92         unsigned int result = 0;
  93         int value;
  94
  95         value = 0;
  96         ::vconf_get_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, &value);
  97         if (value) {
  98                 result |= InternalEncryption::Option::IncludeUnusedRegion;
  99         }
 100
 101         return result;
 102 }
 103
 104 void setOptions(unsigned int options)
 105 {
 106         bool value;
 107
 108         if (options & InternalEncryption::Option::IncludeUnusedRegion) {
 109                 value = true;
 110         } else {
 111                 value = false;
 112         }
 113         ::vconf_set_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, value);
 114 }
 115
 116 }
 117
 118 InternalEncryption::InternalEncryption(ODEControlContext& ctx) :
 119         context(ctx)
 120 {
 121         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::mount)(std::string));
 122         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::umount)());
 123         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::encrypt)(std::string, unsigned int));
 124         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::decrypt)(std::string));
 125         context.expose(this, "", (int)(InternalEncryption::isPasswordInitialized)());
 126         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::initPassword)(std::string));
 127         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::cleanPassword)(std::string));
 128         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::changePassword)(std::string, std::string));
 129         context.expose(this, PRIVILEGE_PLATFORM, (int)(InternalEncryption::verifyPassword)(std::string));
 130         context.expose(this, "", (int)(InternalEncryption::getState)());
 131         context.expose(this, "", (unsigned int)(InternalEncryption::getSupportedOptions)());
 132 }
 133
 134 InternalEncryption::~InternalEncryption()
 135 {
 136 }
 137
 138 int InternalEncryption::mount(const std::string& password)
 139 {
 140         if (getState() != State::Encrypted) {
 141                 return -1;
 142         }
 143
 144         KeyManager::data pwData(password.begin(), password.end());
 145         KeyManager keyManager(engine.getKeyMeta());
 146
 147         if (!keyManager.verifyPassword(pwData)) {
 148                 return -2;
 149         }
 150
 151         engine.mount(keyManager.getMasterKey(pwData), getOptions());
 152         return 0;
 153 }
 154
 155 int InternalEncryption::umount()
 156 {
 157         if (getState() != State::Encrypted) {
 158                 return -1;
 159         }
 160
 161         INFO("Close all processes using internal storage...");
 162         stopDependedSystemdServices();
 163         INFO("Umount internal storage...");
 164         engine.umount();
 165
 166         return 0;
 167 }
 168
 169 int InternalEncryption::encrypt(const std::string& password, unsigned int options)
 170 {
 171         if (getState() != State::Unencrypted) {
 172                 return -1;
 173         }
 174
 175         KeyManager::data pwData(password.begin(), password.end());
 176         KeyManager keyManager(engine.getKeyMeta());
 177
 178         if (!keyManager.verifyPassword(pwData)) {
 179                 return -2;
 180         }
 181
 182         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 183         auto encryptWorker = [MasterKey, options, this]() {
 184                 try {
 185                         showProgressUI("Encrypting");
 186
 187                         INFO("Close all processes using internal storage...");
 188                         stopDependedSystemdServices();
 189                         INFO("Umount internal storage...");
 190                         while (::umount(INTERNAL_STORAGE_PATH) == -1) {
 191                                 if (errno != EBUSY) {
 192                                         throw runtime::Exception("Umount error - " + std::to_string(errno));
 193                                 }
 194                                 stopDependedSystemdServices();
 195                         }
 196
 197                         INFO("Encryption started...");
 198                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 199                         engine.encrypt(MasterKey, options);
 200                         setOptions(options & getSupportedOptions());
 201                         INFO("Sync disk...");
 202                         sync();
 203                         INFO("Encryption completed");
 204
 205                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "encrypted");
 206                 } catch (runtime::Exception &e) {
 207                         ERROR("Encryption failed - " + std::string(e.what()));
 208                 }
 209                 ::reboot(RB_AUTOBOOT);
 210         };
 211
 212         std::thread asyncWork(encryptWorker);
 213         asyncWork.detach();
 214
 215         return 0;
 216 }
 217
 218 int InternalEncryption::decrypt(const std::string& password)
 219 {
 220         if (getState() != State::Encrypted) {
 221                 return -1;
 222         }
 223
 224         KeyManager::data pwData(password.begin(), password.end());
 225         KeyManager keyManager(engine.getKeyMeta());
 226
 227         if (!keyManager.verifyPassword(pwData)) {
 228                 return -2;
 229         }
 230
 231         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 232         auto decryptWorker = [MasterKey, this]() {
 233                 try {
 234                         showProgressUI("Decrypting");
 235
 236                         INFO("Close all processes using internal storage...");
 237                         stopDependedSystemdServices();
 238                         INFO("Umount internal storage...");
 239                         while (1) {
 240                                 try {
 241                                         engine.umount();
 242                                         break;
 243                                 } catch (runtime::Exception& e) {
 244                                         stopDependedSystemdServices();
 245                                 }
 246                         }
 247
 248                         INFO("Decryption started...");
 249                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 250                         engine.decrypt(MasterKey, getOptions());
 251                         INFO("Sync disk...");
 252                         sync();
 253                         INFO("Decryption completed");
 254
 255                         ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "unencrypted");
 256                 } catch (runtime::Exception &e) {
 257                         ERROR("Decryption failed - " + std::string(e.what()));
 258                 }
 259                 ::reboot(RB_AUTOBOOT);
 260         };
 261
 262         std::thread asyncWork(decryptWorker);
 263         asyncWork.detach();
 264
 265         return 0;
 266 }
 267
 268 int InternalEncryption::isPasswordInitialized()
 269 {
 270         if (engine.isKeyMetaSet()) {
 271                 return 1;
 272         }
 273         return 0;
 274 }
 275
 276 int InternalEncryption::initPassword(const std::string& password)
 277 {
 278         KeyManager::data pwData(password.begin(), password.end());
 279         KeyManager keyManager;
 280
 281         keyManager.initPassword(pwData);
 282         engine.setKeyMeta(keyManager.serialize());
 283         return 0;
 284 }
 285
 286 int InternalEncryption::cleanPassword(const std::string& password)
 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         engine.clearKeyMeta();
 296         return 0;
 297 }
 298
 299 int InternalEncryption::changePassword(const std::string& oldPassword,
 300                                                                                 const std::string& newPassword)
 301 {
 302         KeyManager::data oldPwData(oldPassword.begin(), oldPassword.end());
 303         KeyManager::data newPwData(newPassword.begin(), newPassword.end());
 304         KeyManager keyManager(engine.getKeyMeta());
 305
 306         if (!keyManager.verifyPassword(oldPwData)) {
 307                 return -2;
 308         }
 309
 310         keyManager.changePassword(oldPwData, newPwData);
 311         engine.setKeyMeta(keyManager.serialize());
 312
 313         return 0;
 314 }
 315
 316 int InternalEncryption::verifyPassword(const std::string& password)
 317 {
 318         KeyManager::data pwData(password.begin(), password.end());
 319         KeyManager keyManager(engine.getKeyMeta());
 320
 321         if (keyManager.verifyPassword(pwData)) {
 322                 return 1;
 323         }
 324         return 0;
 325 }
 326
 327 int InternalEncryption::getState()
 328 {
 329         char *value = ::vconf_get_str(INTERNAL_STATE_VCONF_KEY);
 330         if (value == NULL) {
 331                 throw runtime::Exception("Failed to get vconf value");
 332         }
 333
 334         std::string valueStr(value);
 335         free(value);
 336
 337         if (valueStr == "encrypted") {
 338                 return State::Encrypted;
 339         } else if (valueStr == "unencrypted") {
 340                 return State::Unencrypted;
 341         } else {
 342                 return State::Corrupted;
 343         }
 344
 345         return 0;
 346 }
 347
 348 unsigned int InternalEncryption::getSupportedOptions()
 349 {
 350         return engine.getSupportedOptions();
 351 }
 352
 353 } // namespace ode