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 namespace ode {
  40
  41 namespace {
  42
  43 VConfBackend vconfBackend(VCONFKEY_ODE_ENCRYPT_PROGRESS);
  44 ProgressBar progressBar(std::bind(&VConfBackend::update, &vconfBackend, std::placeholders::_1));
  45
  46 DMCryptEngine engine("/dev/mmcblk0p25", INTERNAL_STORAGE_PATH, progressBar);
  47
  48 void stopDependedSystemdServices()
  49 {
  50         dbus::Connection& systemDBus = dbus::Connection::getSystem();
  51         std::set<std::string> servicesToStop;
  52
  53         for (pid_t pid : runtime::FileUser::getList(INTERNAL_STORAGE_PATH, true)) {
  54                 try {
  55                         char *service;
  56                         systemDBus.methodcall("org.freedesktop.systemd1",
  57                                                                         "/org/freedesktop/systemd1",
  58                                                                         "org.freedesktop.systemd1.Manager",
  59                                                                         "GetUnitByPID",
  60                                                                         -1, "(o)", "(u)", (unsigned int)pid)
  61                                                                                 .get("(o)", &service);
  62                         servicesToStop.insert(service);
  63                 } catch (runtime::Exception &e) {
  64                         INFO("Close process - " + std::to_string(pid));
  65                         ::kill(pid, SIGKILL);
  66                 }
  67         }
  68
  69         for (const std::string& service : servicesToStop) {
  70                 INFO("Close service - " + service);
  71                 systemDBus.methodcall("org.freedesktop.systemd1",
  72                                                                 service,
  73                                                                 "org.freedesktop.systemd1.Unit",
  74                                                                 "Stop",
  75                                                                 -1, "", "(s)", "flush");
  76         }
  77 }
  78
  79 void showProgressUI(const std::string type) {
  80         std::vector<std::string> args = {
  81                 "ode", "progress", type, "Internal"
  82         };
  83
  84         runtime::Process proc("/usr/bin/ode", args);
  85         proc.execute();
  86 }
  87
  88 unsigned int getOptions()
  89 {
  90         unsigned int result = 0;
  91         int value;
  92
  93         value = 0;
  94         ::vconf_get_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, &value);
  95         if (value) {
  96                 result |= InternalEncryption::Option::IncludeUnusedRegion;
  97         }
  98
  99         return result;
 100 }
 101
 102 void setOptions(unsigned int options)
 103 {
 104         bool value;
 105
 106         if (options & InternalEncryption::Option::IncludeUnusedRegion) {
 107                 value = true;
 108         } else {
 109                 value = false;
 110         }
 111         ::vconf_set_bool(INTERNAL_OPTION_ONLY_USED_REGION_VCONF_KEY, value);
 112 }
 113
 114 }
 115
 116 InternalEncryption::InternalEncryption(ODEControlContext& ctx) :
 117         context(ctx)
 118 {
 119         context.registerParametricMethod(this, "", (int)(InternalEncryption::mount)(std::string));
 120         context.registerNonparametricMethod(this, "", (int)(InternalEncryption::umount));
 121         context.registerParametricMethod(this, "", (int)(InternalEncryption::encrypt)(std::string, unsigned int));
 122         context.registerParametricMethod(this, "", (int)(InternalEncryption::decrypt)(std::string));
 123         context.registerNonparametricMethod(this, "", (int)(InternalEncryption::isPasswordInitialized));
 124         context.registerParametricMethod(this, "", (int)(InternalEncryption::initPassword)(std::string));
 125         context.registerParametricMethod(this, "", (int)(InternalEncryption::cleanPassword)(std::string));
 126         context.registerParametricMethod(this, "", (int)(InternalEncryption::changePassword)(std::string, std::string));
 127         context.registerParametricMethod(this, "", (int)(InternalEncryption::verifyPassword)(std::string));
 128         context.registerNonparametricMethod(this, "", (int)(InternalEncryption::getState));
 129         context.registerNonparametricMethod(this, "", (unsigned int)(InternalEncryption::getSupportedOptions));
 130 }
 131
 132 InternalEncryption::~InternalEncryption()
 133 {
 134 }
 135
 136 int InternalEncryption::mount(const std::string& password)
 137 {
 138         if (getState() != State::Encrypted) {
 139                 return -1;
 140         }
 141
 142         KeyManager::data pwData(password.begin(), password.end());
 143         KeyManager keyManager(engine.getKeyMeta());
 144
 145         if (!keyManager.verifyPassword(pwData)) {
 146                 return -2;
 147         }
 148
 149         engine.mount(keyManager.getMasterKey(pwData), getOptions());
 150         return 0;
 151 }
 152
 153 int InternalEncryption::umount()
 154 {
 155         if (getState() != State::Encrypted) {
 156                 return -1;
 157         }
 158
 159         INFO("Close all processes using internal storage...");
 160         stopDependedSystemdServices();
 161         INFO("Umount internal storage...");
 162         engine.umount();
 163
 164         return 0;
 165 }
 166
 167 int InternalEncryption::encrypt(const std::string& password, unsigned int options)
 168 {
 169         if (getState() != State::Unencrypted) {
 170                 return -1;
 171         }
 172
 173         KeyManager::data pwData(password.begin(), password.end());
 174         KeyManager keyManager(engine.getKeyMeta());
 175
 176         if (!keyManager.verifyPassword(pwData)) {
 177                 return -2;
 178         }
 179
 180         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 181         auto encryptWorker = [&MasterKey, options, this]() {
 182                 showProgressUI("Encrypting");
 183
 184                 INFO("Close all processes using internal storage...");
 185                 stopDependedSystemdServices();
 186                 INFO("Umount internal storage...");
 187                 while (::umount(INTERNAL_STORAGE_PATH) == -1) {
 188                         if (errno != EBUSY) {
 189                                 break;
 190                         }
 191                 }
 192
 193                 INFO("Encryption started...");
 194                 ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 195                 engine.encrypt(MasterKey, options);
 196                 setOptions(options & getSupportedOptions());
 197                 INFO("Sync disk...");
 198                 sync();
 199                 INFO("Encryption completed");
 200
 201                 ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "encrypted");
 202                 ::reboot(RB_AUTOBOOT);
 203         };
 204
 205         std::thread asyncWork(encryptWorker);
 206         asyncWork.detach();
 207
 208         return 0;
 209 }
 210
 211 int InternalEncryption::decrypt(const std::string& password)
 212 {
 213         if (getState() != State::Encrypted) {
 214                 return -1;
 215         }
 216
 217         KeyManager::data pwData(password.begin(), password.end());
 218         KeyManager keyManager(engine.getKeyMeta());
 219
 220         if (!keyManager.verifyPassword(pwData)) {
 221                 return -2;
 222         }
 223
 224         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 225         auto decryptWorker = [MasterKey, this]() {
 226                 showProgressUI("Decrypting");
 227
 228                 INFO("Close all processes using internal storage...");
 229                 stopDependedSystemdServices();
 230                 INFO("Umount internal storage...");
 231                 try {
 232                         engine.umount();
 233                 } catch (runtime::Exception& e) {}
 234
 235                 INFO("Decryption started...");
 236                 ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "error_partially_encrypted");
 237                 engine.decrypt(MasterKey, getOptions());
 238                 INFO("Sync disk...");
 239                 sync();
 240                 INFO("Decryption completed");
 241
 242                 ::vconf_set_str(INTERNAL_STATE_VCONF_KEY, "unencrypted");
 243                 ::reboot(RB_AUTOBOOT);
 244         };
 245
 246         std::thread asyncWork(decryptWorker);
 247         asyncWork.detach();
 248
 249         return 0;
 250 }
 251
 252 int InternalEncryption::isPasswordInitialized()
 253 {
 254         if (engine.isKeyMetaSet()) {
 255                 return 1;
 256         }
 257         return 0;
 258 }
 259
 260 int InternalEncryption::initPassword(const std::string& password)
 261 {
 262         KeyManager::data pwData(password.begin(), password.end());
 263         KeyManager keyManager;
 264
 265         keyManager.initPassword(pwData);
 266         engine.setKeyMeta(keyManager.serialize());
 267         return 0;
 268 }
 269
 270 int InternalEncryption::cleanPassword(const std::string& password)
 271 {
 272         KeyManager::data pwData(password.begin(), password.end());
 273         KeyManager keyManager(engine.getKeyMeta());
 274
 275         if (!keyManager.verifyPassword(pwData)) {
 276                 return -2;
 277         }
 278
 279         engine.clearKeyMeta();
 280         return 0;
 281 }
 282
 283 int InternalEncryption::changePassword(const std::string& oldPassword,
 284                                                                                 const std::string& newPassword)
 285 {
 286         KeyManager::data oldPwData(oldPassword.begin(), oldPassword.end());
 287         KeyManager::data newPwData(newPassword.begin(), newPassword.end());
 288         KeyManager keyManager(engine.getKeyMeta());
 289
 290         if (!keyManager.verifyPassword(oldPwData)) {
 291                 return -2;
 292         }
 293
 294         keyManager.changePassword(oldPwData, newPwData);
 295         engine.setKeyMeta(keyManager.serialize());
 296
 297         return 0;
 298 }
 299
 300 int InternalEncryption::verifyPassword(const std::string& password)
 301 {
 302         KeyManager::data pwData(password.begin(), password.end());
 303         KeyManager keyManager(engine.getKeyMeta());
 304
 305         if (keyManager.verifyPassword(pwData)) {
 306                 return 1;
 307         }
 308         return 0;
 309 }
 310
 311
 312
 313 int InternalEncryption::getState()
 314 {
 315         char *value = ::vconf_get_str(INTERNAL_STATE_VCONF_KEY);
 316         if (value == NULL) {
 317                 throw runtime::Exception("Failed to get vconf value");
 318         }
 319
 320         std::string valueStr(value);
 321         free(value);
 322
 323         if (valueStr == "encrypted") {
 324                 return State::Encrypted;
 325         } else if (valueStr == "unencrypted") {
 326                 return State::Unencrypted;
 327         } else {
 328                 return State::Corrupted;
 329         }
 330
 331         return 0;
 332 }
 333
 334 unsigned int InternalEncryption::getSupportedOptions()
 335 {
 336         return engine.getSupportedOptions();
 337 }
 338
 339 } // namespace ode