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 KeyManager keyManager(INTERNAL_STORAGE_PATH);
  41 DMCryptEngine engine("/dev/mmcblk0p25", INTERNAL_STORAGE_PATH);
  42
  43 void stopDependedSystemdServices()
  44 {
  45         dbus::Connection& systemDBus = dbus::Connection::getSystem();
  46         std::set<std::string> servicesToStop;
  47
  48         for (pid_t pid : runtime::FileUser::getList(INTERNAL_STORAGE_PATH, true)) {
  49                 try {
  50                         char *service;
  51                         systemDBus.methodcall("org.freedesktop.systemd1",
  52                                                                         "/org/freedesktop/systemd1",
  53                                                                         "org.freedesktop.systemd1.Manager",
  54                                                                         "GetUnitByPID",
  55                                                                         -1, "(o)", "(u)", (unsigned int)pid)
  56                                                                                 .get("(o)", &service);
  57                         servicesToStop.insert(service);
  58                 } catch (runtime::Exception &e) {
  59                         INFO("Close process - " + std::to_string(pid));
  60                         ::kill(pid, SIGKILL);
  61                 }
  62         }
  63
  64         for (const std::string& service : servicesToStop) {
  65                 INFO("Close service - " + service);
  66                 systemDBus.methodcall("org.freedesktop.systemd1",
  67                                                                 service,
  68                                                                 "org.freedesktop.systemd1.Unit",
  69                                                                 "Stop",
  70                                                                 -1, "", "(s)", "flush");
  71         }
  72 }
  73
  74 void showProgressUI(const std::string type) {
  75         std::vector<std::string> args = {
  76                 "ode-gui", "progress", type, "Internal storage encryption"
  77         };
  78
  79         runtime::Process proc("/usr/bin/ode-gui", args);
  80         proc.execute();
  81 }
  82
  83 }
  84
  85 InternalEncryption::InternalEncryption(ODEControlContext& ctx) :
  86         context(ctx)
  87 {
  88         context.registerParametricMethod(this, "", (int)(InternalEncryption::mount)(std::string));
  89         context.registerNonparametricMethod(this, "", (int)(InternalEncryption::umount));
  90         context.registerParametricMethod(this, "", (int)(InternalEncryption::encrypt)(std::string));
  91         context.registerParametricMethod(this, "", (int)(InternalEncryption::decrypt)(std::string));
  92         context.registerParametricMethod(this, "", (int)(InternalEncryption::changePassword)(std::string, std::string));
  93         context.registerNonparametricMethod(this, "", (int)(InternalEncryption::getState));
  94 }
  95
  96 InternalEncryption::~InternalEncryption()
  97 {
  98 }
  99
 100 int InternalEncryption::mount(const std::string& password)
 101 {
 102         bool isVerified = false;
 103         KeyManager::data pwData(password.begin(), password.end());
 104
 105         try {
 106                 isVerified = keyManager.verifyPassword(pwData);
 107         } catch (runtime::Exception& e) {}
 108
 109         if (!isVerified) {
 110                 return -1;
 111         }
 112
 113         engine.mount(keyManager.getDEK(pwData));
 114         return 0;
 115 }
 116
 117 int InternalEncryption::umount()
 118 {
 119         INFO("Close all processes using internal storage...");
 120         stopDependedSystemdServices();
 121         INFO("Umount internal storage...");
 122         engine.umount();
 123
 124         return 0;
 125 }
 126
 127 int InternalEncryption::encrypt(const std::string& password)
 128 {
 129         KeyManager::data pwData(password.begin(), password.end());
 130
 131         if (keyManager.isInitialized()) {
 132                 bool isVerified = false;
 133                 try {
 134                         isVerified = keyManager.verifyPassword(pwData);
 135                 } catch (runtime::Exception& e) {}
 136
 137                 if (!isVerified) {
 138                         return -2;
 139                 }
 140         } else {
 141                 keyManager.initPassword(pwData);
 142         }
 143
 144         KeyManager::data DEK = keyManager.getDEK(pwData);
 145         auto encryptWorker = [DEK, this]() {
 146                 showProgressUI("Encrypting");
 147
 148                 INFO("Close all processes using internal storage...");
 149                 stopDependedSystemdServices();
 150                 INFO("Umount internal storage...");
 151                 while (::umount(INTERNAL_STORAGE_PATH) == -1) {
 152                         if (errno != EBUSY) {
 153                                 break;
 154                         }
 155                 }
 156
 157                 INFO("Encryption started...");
 158                 engine.encrypt(DEK);
 159                 INFO("Sync disk...");
 160                 sync();
 161                 INFO("Encryption completed");
 162                 ::reboot(RB_AUTOBOOT);
 163         };
 164
 165         std::thread asyncWork(encryptWorker);
 166         asyncWork.detach();
 167
 168         return 0;
 169 }
 170
 171 int InternalEncryption::decrypt(const std::string& password)
 172 {
 173         bool isVerified = false;
 174         KeyManager::data pwData(password.begin(), password.end());
 175
 176         try {
 177                 isVerified = keyManager.verifyPassword(pwData);
 178         } catch (runtime::Exception& e) {}
 179
 180         if (!isVerified) {
 181                 return -1;
 182         }
 183
 184         KeyManager::data DEK = keyManager.getDEK(pwData);
 185         auto decryptWorker = [DEK, this]() {
 186                 showProgressUI("Decrypting");
 187
 188                 INFO("Close all processes using internal storage...");
 189                 stopDependedSystemdServices();
 190                 INFO("Umount internal storage...");
 191                 try {
 192                         engine.umount();
 193                 } catch (runtime::Exception& e) {}
 194
 195                 INFO("Decryption started...");
 196                 engine.decrypt(DEK);
 197                 INFO("Sync disk...");
 198                 sync();
 199                 INFO("Decryption completed");
 200                 ::reboot(RB_AUTOBOOT);
 201         };
 202
 203         std::thread asyncWork(decryptWorker);
 204         asyncWork.detach();
 205
 206         keyManager.clearPassword();
 207
 208         return 0;
 209 }
 210
 211 int InternalEncryption::changePassword(const std::string& oldPassword,
 212                                                                                 const std::string& newPassword)
 213 {
 214         KeyManager::data oldPwData(oldPassword.begin(), oldPassword.end());
 215         KeyManager::data newPwData(newPassword.begin(), oldPassword.end());
 216
 217         bool isVerified = false;
 218         try     {
 219                 isVerified = keyManager.verifyPassword(newPwData);
 220         } catch (runtime::Exception& e) {}
 221
 222         if (!isVerified) {
 223                 return -1;
 224         }
 225
 226         keyManager.changePassword(oldPwData, newPwData);
 227         return 0;
 228 }
 229
 230 int InternalEncryption::getState()
 231 {
 232         //TODO
 233         return 0;
 234 }
 235
 236 } // namespace ode