nmode's Git Repositories - signal-cli/blob - lib/src/main/java/org/asamk/signal/manager/helper/AccountHelper.java

   1 package org.asamk.signal.manager.helper;
   2
   3 import org.asamk.signal.manager.DeviceLinkInfo;
   4 import org.asamk.signal.manager.SignalDependencies;
   5 import org.asamk.signal.manager.api.CaptchaRequiredException;
   6 import org.asamk.signal.manager.api.IncorrectPinException;
   7 import org.asamk.signal.manager.api.InvalidDeviceLinkException;
   8 import org.asamk.signal.manager.api.NonNormalizedPhoneNumberException;
   9 import org.asamk.signal.manager.api.PinLockedException;
  10 import org.asamk.signal.manager.api.RateLimitException;
  11 import org.asamk.signal.manager.storage.SignalAccount;
  12 import org.asamk.signal.manager.util.KeyUtils;
  13 import org.asamk.signal.manager.util.NumberVerificationUtils;
  14 import org.asamk.signal.manager.util.Utils;
  15 import org.signal.libsignal.protocol.IdentityKeyPair;
  16 import org.signal.libsignal.protocol.InvalidKeyException;
  17 import org.signal.libsignal.protocol.state.SignedPreKeyRecord;
  18 import org.signal.libsignal.usernames.BaseUsernameException;
  19 import org.signal.libsignal.usernames.Username;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22 import org.whispersystems.signalservice.api.account.ChangePhoneNumberRequest;
  23 import org.whispersystems.signalservice.api.push.ACI;
  24 import org.whispersystems.signalservice.api.push.PNI;
  25 import org.whispersystems.signalservice.api.push.ServiceIdType;
  26 import org.whispersystems.signalservice.api.push.SignedPreKeyEntity;
  27 import org.whispersystems.signalservice.api.push.exceptions.AlreadyVerifiedException;
  28 import org.whispersystems.signalservice.api.push.exceptions.AuthorizationFailedException;
  29 import org.whispersystems.signalservice.api.push.exceptions.DeprecatedVersionException;
  30 import org.whispersystems.signalservice.api.util.DeviceNameUtil;
  31 import org.whispersystems.signalservice.internal.push.OutgoingPushMessage;
  32 import org.whispersystems.util.Base64UrlSafe;
  33
  34 import java.io.IOException;
  35 import java.util.ArrayList;
  36 import java.util.List;
  37 import java.util.Map;
  38 import java.util.Objects;
  39 import java.util.Optional;
  40 import java.util.concurrent.TimeUnit;
  41
  42 import static org.whispersystems.signalservice.internal.util.Util.isEmpty;
  43
  44 public class AccountHelper {
  45
  46     private final static Logger logger = LoggerFactory.getLogger(AccountHelper.class);
  47
  48     private final Context context;
  49     private final SignalAccount account;
  50     private final SignalDependencies dependencies;
  51
  52     private Callable unregisteredListener;
  53
  54     public AccountHelper(final Context context) {
  55         this.account = context.getAccount();
  56         this.dependencies = context.getDependencies();
  57         this.context = context;
  58     }
  59
  60     public void setUnregisteredListener(final Callable unregisteredListener) {
  61         this.unregisteredListener = unregisteredListener;
  62     }
  63
  64     public void checkAccountState() throws IOException {
  65         if (account.getLastReceiveTimestamp() == 0) {
  66             logger.info("The Signal protocol expects that incoming messages are regularly received.");
  67         } else {
  68             var diffInMilliseconds = System.currentTimeMillis() - account.getLastReceiveTimestamp();
  69             long days = TimeUnit.DAYS.convert(diffInMilliseconds, TimeUnit.MILLISECONDS);
  70             if (days > 7) {
  71                 logger.warn(
  72                         "Messages have been last received {} days ago. The Signal protocol expects that incoming messages are regularly received.",
  73                         days);
  74             }
  75         }
  76         try {
  77             updateAccountAttributes();
  78             context.getPreKeyHelper().refreshPreKeysIfNecessary();
  79             if (account.getAci() == null || account.getPni() == null) {
  80                 checkWhoAmiI();
  81             }
  82             if (!account.isPrimaryDevice() && account.getPniIdentityKeyPair() == null) {
  83                 context.getSyncHelper().requestSyncPniIdentity();
  84             }
  85             if (account.getPreviousStorageVersion() < 4
  86                     && account.isPrimaryDevice()
  87                     && account.getRegistrationLockPin() != null) {
  88                 migrateRegistrationPin();
  89             }
  90         } catch (DeprecatedVersionException e) {
  91             logger.debug("Signal-Server returned deprecated version exception", e);
  92             throw e;
  93         } catch (AuthorizationFailedException e) {
  94             account.setRegistered(false);
  95             throw e;
  96         }
  97     }
  98
  99     public void checkWhoAmiI() throws IOException {
 100         final var whoAmI = dependencies.getAccountManager().getWhoAmI();
 101         final var number = whoAmI.getNumber();
 102         final var aci = ACI.parseOrNull(whoAmI.getAci());
 103         final var pni = PNI.parseOrNull(whoAmI.getPni());
 104         if (number.equals(account.getNumber()) && aci.equals(account.getAci()) && pni.equals(account.getPni())) {
 105             return;
 106         }
 107
 108         updateSelfIdentifiers(number, aci, pni);
 109     }
 110
 111     private void updateSelfIdentifiers(final String number, final ACI aci, final PNI pni) {
 112         account.setNumber(number);
 113         account.setAci(aci);
 114         account.setPni(pni);
 115         if (account.isPrimaryDevice() && account.getPniIdentityKeyPair() == null && account.getPni() != null) {
 116             account.setPniIdentityKeyPair(KeyUtils.generateIdentityKeyPair());
 117         }
 118         account.getRecipientTrustedResolver().resolveSelfRecipientTrusted(account.getSelfRecipientAddress());
 119         // TODO check and update remote storage
 120         context.getUnidentifiedAccessHelper().rotateSenderCertificates();
 121         dependencies.resetAfterAddressChange();
 122         context.getAccountFileUpdater().updateAccountIdentifiers(account.getNumber(), account.getAci());
 123     }
 124
 125     public void setPni(
 126             final PNI updatedPni,
 127             final IdentityKeyPair pniIdentityKeyPair,
 128             final SignedPreKeyRecord pniSignedPreKey,
 129             final int localPniRegistrationId
 130     ) throws IOException {
 131         account.setPni(updatedPni, pniIdentityKeyPair, pniSignedPreKey, localPniRegistrationId);
 132         context.getPreKeyHelper().refreshPreKeysIfNecessary(ServiceIdType.PNI);
 133         if (account.getPni() == null || !account.getPni().equals(updatedPni)) {
 134             context.getGroupV2Helper().clearAuthCredentialCache();
 135         }
 136     }
 137
 138     public void startChangeNumber(
 139             String newNumber, String captcha, boolean voiceVerification
 140     ) throws IOException, CaptchaRequiredException, NonNormalizedPhoneNumberException, RateLimitException {
 141         final var accountManager = dependencies.createUnauthenticatedAccountManager(newNumber, account.getPassword());
 142         String sessionId = NumberVerificationUtils.handleVerificationSession(accountManager,
 143                 account.getSessionId(newNumber),
 144                 id -> account.setSessionId(newNumber, id),
 145                 voiceVerification,
 146                 captcha);
 147         NumberVerificationUtils.requestVerificationCode(accountManager, sessionId, voiceVerification);
 148     }
 149
 150     public void finishChangeNumber(
 151             String newNumber, String verificationCode, String pin
 152     ) throws IncorrectPinException, PinLockedException, IOException {
 153         // TODO create new PNI identity key
 154         final List<OutgoingPushMessage> deviceMessages = null;
 155         final Map<String, SignedPreKeyEntity> devicePniSignedPreKeys = null;
 156         final Map<String, Integer> pniRegistrationIds = null;
 157         var sessionId = account.getSessionId(account.getNumber());
 158         final var result = NumberVerificationUtils.verifyNumber(sessionId,
 159                 verificationCode,
 160                 pin,
 161                 context.getPinHelper(),
 162                 (sessionId1, verificationCode1, registrationLock) -> {
 163                     final var accountManager = dependencies.getAccountManager();
 164                     try {
 165                         Utils.handleResponseException(accountManager.verifyAccount(verificationCode, sessionId1));
 166                     } catch (AlreadyVerifiedException e) {
 167                         // Already verified so can continue changing number
 168                     }
 169                     return Utils.handleResponseException(accountManager.changeNumber(new ChangePhoneNumberRequest(
 170                             sessionId1,
 171                             null,
 172                             newNumber,
 173                             registrationLock,
 174                             account.getPniIdentityKeyPair().getPublicKey(),
 175                             deviceMessages,
 176                             devicePniSignedPreKeys,
 177                             pniRegistrationIds)));
 178                 });
 179         // TODO handle response
 180         updateSelfIdentifiers(newNumber, account.getAci(), PNI.parseOrThrow(result.first().getPni()));
 181     }
 182
 183     public static final int USERNAME_MIN_LENGTH = 3;
 184     public static final int USERNAME_MAX_LENGTH = 32;
 185
 186     public String reserveUsername(String nickname) throws IOException, BaseUsernameException {
 187         final var currentUsername = account.getUsername();
 188         if (currentUsername != null) {
 189             final var currentNickname = currentUsername.substring(0, currentUsername.indexOf('.'));
 190             if (currentNickname.equals(nickname)) {
 191                 refreshCurrentUsername();
 192                 return currentUsername;
 193             }
 194         }
 195
 196         final var candidates = Username.generateCandidates(nickname, USERNAME_MIN_LENGTH, USERNAME_MAX_LENGTH);
 197         final var candidateHashes = new ArrayList<String>();
 198         for (final var candidate : candidates) {
 199             candidateHashes.add(Base64UrlSafe.encodeBytesWithoutPadding(Username.hash(candidate)));
 200         }
 201
 202         final var response = dependencies.getAccountManager().reserveUsername(candidateHashes);
 203         final var hashIndex = candidateHashes.indexOf(response.getUsernameHash());
 204         if (hashIndex == -1) {
 205             logger.warn("[reserveUsername] The response hash could not be found in our set of candidateHashes.");
 206             throw new IOException("Unexpected username response");
 207         }
 208
 209         logger.debug("[reserveUsername] Successfully reserved username.");
 210         final var username = candidates.get(hashIndex);
 211
 212         dependencies.getAccountManager().confirmUsername(username, response);
 213         account.setUsername(username);
 214         account.getRecipientStore().resolveSelfRecipientTrusted(account.getSelfRecipientAddress());
 215         logger.debug("[confirmUsername] Successfully confirmed username.");
 216
 217         return username;
 218     }
 219
 220     public void refreshCurrentUsername() throws IOException, BaseUsernameException {
 221         final var localUsername = account.getUsername();
 222         if (localUsername == null) {
 223             return;
 224         }
 225
 226         final var whoAmIResponse = dependencies.getAccountManager().getWhoAmI();
 227         final var serverUsernameHash = whoAmIResponse.getUsernameHash();
 228         final var hasServerUsername = !isEmpty(serverUsernameHash);
 229         final var localUsernameHash = Base64UrlSafe.encodeBytesWithoutPadding(Username.hash(localUsername));
 230
 231         if (!hasServerUsername) {
 232             logger.debug("No remote username is set.");
 233         }
 234
 235         if (!Objects.equals(localUsernameHash, serverUsernameHash)) {
 236             logger.debug("Local username hash does not match server username hash.");
 237         }
 238
 239         if (!hasServerUsername || !Objects.equals(localUsernameHash, serverUsernameHash)) {
 240             logger.debug("Attempting to resynchronize username.");
 241             tryReserveConfirmUsername(localUsername, localUsernameHash);
 242         } else {
 243             logger.debug("Username already set, not refreshing.");
 244         }
 245     }
 246
 247     private void tryReserveConfirmUsername(final String username, String localUsernameHash) throws IOException {
 248         final var response = dependencies.getAccountManager().reserveUsername(List.of(localUsernameHash));
 249         logger.debug("[reserveUsername] Successfully reserved existing username.");
 250         dependencies.getAccountManager().confirmUsername(username, response);
 251         logger.debug("[confirmUsername] Successfully confirmed existing username.");
 252     }
 253
 254     public void deleteUsername() throws IOException {
 255         dependencies.getAccountManager().deleteUsername();
 256         account.setUsername(null);
 257         logger.debug("[deleteUsername] Successfully deleted the username.");
 258     }
 259
 260     public void setDeviceName(String deviceName) {
 261         final var privateKey = account.getAciIdentityKeyPair().getPrivateKey();
 262         final var encryptedDeviceName = DeviceNameUtil.encryptDeviceName(deviceName, privateKey);
 263         account.setEncryptedDeviceName(encryptedDeviceName);
 264     }
 265
 266     public void updateAccountAttributes() throws IOException {
 267         dependencies.getAccountManager().setAccountAttributes(account.getAccountAttributes(null));
 268     }
 269
 270     public void addDevice(DeviceLinkInfo deviceLinkInfo) throws IOException, InvalidDeviceLinkException {
 271         var verificationCode = dependencies.getAccountManager().getNewDeviceVerificationCode();
 272
 273         try {
 274             dependencies.getAccountManager()
 275                     .addDevice(deviceLinkInfo.deviceIdentifier(),
 276                             deviceLinkInfo.deviceKey(),
 277                             account.getAciIdentityKeyPair(),
 278                             account.getPniIdentityKeyPair(),
 279                             account.getProfileKey(),
 280                             verificationCode);
 281         } catch (InvalidKeyException e) {
 282             throw new InvalidDeviceLinkException("Invalid device link", e);
 283         }
 284         account.setMultiDevice(true);
 285     }
 286
 287     public void removeLinkedDevices(int deviceId) throws IOException {
 288         dependencies.getAccountManager().removeDevice(deviceId);
 289         var devices = dependencies.getAccountManager().getDevices();
 290         account.setMultiDevice(devices.size() > 1);
 291     }
 292
 293     public void migrateRegistrationPin() throws IOException {
 294         var masterKey = account.getOrCreatePinMasterKey();
 295
 296         context.getPinHelper().migrateRegistrationLockPin(account.getRegistrationLockPin(), masterKey);
 297     }
 298
 299     public void setRegistrationPin(String pin) throws IOException {
 300         var masterKey = account.getOrCreatePinMasterKey();
 301
 302         context.getPinHelper().setRegistrationLockPin(pin, masterKey);
 303
 304         account.setRegistrationLockPin(pin);
 305     }
 306
 307     public void removeRegistrationPin() throws IOException {
 308         // Remove KBS Pin
 309         context.getPinHelper().removeRegistrationLockPin();
 310
 311         account.setRegistrationLockPin(null);
 312     }
 313
 314     public void unregister() throws IOException {
 315         // When setting an empty GCM id, the Signal-Server also sets the fetchesMessages property to false.
 316         // If this is the primary device, other users can't send messages to this number anymore.
 317         // If this is a linked device, other users can still send messages, but this device doesn't receive them anymore.
 318         dependencies.getAccountManager().setGcmId(Optional.empty());
 319
 320         account.setRegistered(false);
 321         unregisteredListener.call();
 322     }
 323
 324     public void deleteAccount() throws IOException {
 325         try {
 326             context.getPinHelper().removeRegistrationLockPin();
 327         } catch (IOException e) {
 328             logger.warn("Failed to remove registration lock pin");
 329         }
 330         account.setRegistrationLockPin(null);
 331
 332         dependencies.getAccountManager().deleteAccount();
 333
 334         account.setRegistered(false);
 335         unregisteredListener.call();
 336     }
 337
 338     public interface Callable {
 339
 340         void call();
 341     }
 342 }