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 <klay/process.h>
  24 #include <klay/file-user.h>
  25 #include <klay/filesystem.h>
  26 #include <klay/dbus/connection.h>
  27 #include <klay/audit/logger.h>
  28
  29 #include "engine/dmcrypt-engine.h"
  30 #include "key-manager/key-manager.h"
  31
  32 #include "rmi/internal-encryption.h"
  33
  34 #define INTERNAL_STORAGE_PATH   "/opt/usr"
  35
  36 namespace ode {
  37
  38 namespace {
  39
  40 DMCryptEngine engine("/dev/mmcblk0p25", INTERNAL_STORAGE_PATH);
  41
  42 void stopDependedSystemdServices()
  43 {
  44         dbus::Connection& systemDBus = dbus::Connection::getSystem();
  45         std::set<std::string> servicesToStop;
  46
  47         for (pid_t pid : runtime::FileUser::getList(INTERNAL_STORAGE_PATH, true)) {
  48                 try {
  49                         char *service;
  50                         systemDBus.methodcall("org.freedesktop.systemd1",
  51                                                                         "/org/freedesktop/systemd1",
  52                                                                         "org.freedesktop.systemd1.Manager",
  53                                                                         "GetUnitByPID",
  54                                                                         -1, "(o)", "(u)", (unsigned int)pid)
  55                                                                                 .get("(o)", &service);
  56                         servicesToStop.insert(service);
  57                 } catch (runtime::Exception &e) {
  58                         INFO("Close process - " + std::to_string(pid));
  59                         ::kill(pid, SIGKILL);
  60                 }
  61         }
  62
  63         for (const std::string& service : servicesToStop) {
  64                 INFO("Close service - " + service);
  65                 systemDBus.methodcall("org.freedesktop.systemd1",
  66                                                                 service,
  67                                                                 "org.freedesktop.systemd1.Unit",
  68                                                                 "Stop",
  69                                                                 -1, "", "(s)", "flush");
  70         }
  71 }
  72
  73 void showProgressUI(const std::string type) {
  74         std::vector<std::string> args = {
  75                 "ode-gui", "progress", type, "Internal storage encryption"
  76         };
  77
  78         runtime::Process proc("/usr/bin/ode-gui", args);
  79         proc.execute();
  80 }
  81
  82 }
  83
  84 InternalEncryption::InternalEncryption(ODEControlContext& ctx) :
  85         context(ctx)
  86 {
  87         context.registerParametricMethod(this, "", (int)(InternalEncryption::mount)(std::string));
  88         context.registerNonparametricMethod(this, "", (int)(InternalEncryption::umount));
  89         context.registerParametricMethod(this, "", (int)(InternalEncryption::encrypt)(std::string));
  90         context.registerParametricMethod(this, "", (int)(InternalEncryption::decrypt)(std::string));
  91         context.registerParametricMethod(this, "", (int)(InternalEncryption::changePassword)(std::string, std::string));
  92         context.registerNonparametricMethod(this, "", (int)(InternalEncryption::getState));
  93 }
  94
  95 InternalEncryption::~InternalEncryption()
  96 {
  97 }
  98
  99 int InternalEncryption::mount(const std::string& password)
 100 {
 101         KeyManager::data pwData(password.begin(), password.end());
 102         KeyManager keyManager(engine.getKeyMeta());
 103
 104         if (!keyManager.verifyPassword(pwData)) {
 105                 return -2;
 106         }
 107
 108         engine.mount(keyManager.getMasterKey(pwData));
 109         return 0;
 110 }
 111
 112 int InternalEncryption::umount()
 113 {
 114         INFO("Close all processes using internal storage...");
 115         stopDependedSystemdServices();
 116         INFO("Umount internal storage...");
 117         engine.umount();
 118
 119         return 0;
 120 }
 121
 122 int InternalEncryption::encrypt(const std::string& password)
 123 {
 124         KeyManager::data pwData(password.begin(), password.end());
 125         KeyManager keyManager;
 126
 127         keyManager.initPassword(pwData);
 128         engine.setKeyMeta(keyManager.serialize());
 129
 130         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 131         auto encryptWorker = [MasterKey, this]() {
 132                 showProgressUI("Encrypting");
 133
 134                 INFO("Close all processes using internal storage...");
 135                 stopDependedSystemdServices();
 136                 INFO("Umount internal storage...");
 137                 while (::umount(INTERNAL_STORAGE_PATH) == -1) {
 138                         if (errno != EBUSY) {
 139                                 break;
 140                         }
 141                 }
 142
 143                 INFO("Encryption started...");
 144                 engine.encrypt(MasterKey);
 145                 INFO("Sync disk...");
 146                 sync();
 147                 INFO("Encryption completed");
 148                 ::reboot(RB_AUTOBOOT);
 149         };
 150
 151         std::thread asyncWork(encryptWorker);
 152         asyncWork.detach();
 153
 154         return 0;
 155 }
 156
 157 int InternalEncryption::decrypt(const std::string& password)
 158 {
 159         KeyManager::data pwData(password.begin(), password.end());
 160         KeyManager keyManager(engine.getKeyMeta());
 161
 162         if (!keyManager.verifyPassword(pwData)) {
 163                 return -2;
 164         }
 165
 166         KeyManager::data MasterKey = keyManager.getMasterKey(pwData);
 167         auto decryptWorker = [MasterKey, this]() {
 168                 showProgressUI("Decrypting");
 169
 170                 INFO("Close all processes using internal storage...");
 171                 stopDependedSystemdServices();
 172                 INFO("Umount internal storage...");
 173                 try {
 174                         engine.umount();
 175                 } catch (runtime::Exception& e) {}
 176
 177                 INFO("Decryption started...");
 178                 engine.decrypt(MasterKey);
 179                 INFO("Sync disk...");
 180                 sync();
 181                 INFO("Decryption completed");
 182                 ::reboot(RB_AUTOBOOT);
 183         };
 184
 185         std::thread asyncWork(decryptWorker);
 186         asyncWork.detach();
 187
 188         return 0;
 189 }
 190
 191 int InternalEncryption::changePassword(const std::string& oldPassword,
 192                                                                                 const std::string& newPassword)
 193 {
 194         KeyManager::data oldPwData(oldPassword.begin(), oldPassword.end());
 195         KeyManager::data newPwData(newPassword.begin(), newPassword.end());
 196         KeyManager keyManager(engine.getKeyMeta());
 197
 198         if (!keyManager.verifyPassword(oldPwData)) {
 199                 return -2;
 200         }
 201
 202         keyManager.changePassword(oldPwData, newPwData);
 203         engine.setKeyMeta(keyManager.serialize());
 204
 205         return 0;
 206 }
 207
 208 int InternalEncryption::getState()
 209 {
 210         //TODO
 211         return 0;
 212 }
 213
 214 } // namespace ode