nmode's Git Repositories - signal-cli/blob - lib/src/main/java/org/asamk/signal/manager/storage/groups/LegacyGroupStore.java

   1 package org.asamk.signal.manager.storage.groups;
   2
   3 import com.fasterxml.jackson.annotation.JsonInclude;
   4 import com.fasterxml.jackson.core.JsonParser;
   5 import com.fasterxml.jackson.databind.DeserializationContext;
   6 import com.fasterxml.jackson.databind.JsonDeserializer;
   7 import com.fasterxml.jackson.databind.JsonNode;
   8 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
   9
  10 import org.asamk.signal.manager.api.GroupId;
  11 import org.asamk.signal.manager.api.GroupIdV1;
  12 import org.asamk.signal.manager.api.GroupIdV2;
  13 import org.asamk.signal.manager.storage.recipients.RecipientAddress;
  14 import org.asamk.signal.manager.storage.recipients.RecipientResolver;
  15 import org.signal.libsignal.zkgroup.InvalidInputException;
  16 import org.signal.libsignal.zkgroup.groups.GroupMasterKey;
  17 import org.signal.storageservice.protos.groups.local.DecryptedGroup;
  18 import org.slf4j.Logger;
  19 import org.slf4j.LoggerFactory;
  20 import org.whispersystems.signalservice.api.push.DistributionId;
  21 import org.whispersystems.signalservice.api.push.ServiceId;
  22 import org.whispersystems.signalservice.internal.util.Hex;
  23
  24 import java.io.File;
  25 import java.io.FileInputStream;
  26 import java.io.IOException;
  27 import java.nio.file.Files;
  28 import java.util.ArrayList;
  29 import java.util.Base64;
  30 import java.util.List;
  31 import java.util.Objects;
  32 import java.util.stream.Collectors;
  33
  34 public class LegacyGroupStore {
  35
  36     private static final Logger logger = LoggerFactory.getLogger(LegacyGroupStore.class);
  37
  38     public static void migrate(
  39             final Storage storage,
  40             final File groupCachePath,
  41             final RecipientResolver recipientResolver,
  42             final GroupStore groupStore
  43     ) {
  44         final var groups = storage.groups.stream().map(g -> {
  45             if (g instanceof Storage.GroupV1 g1) {
  46                 final var members = g1.members.stream().map(m -> {
  47                     if (m.recipientId == null) {
  48                         return recipientResolver.resolveRecipient(new RecipientAddress(ServiceId.ACI.parseOrNull(m.uuid),
  49                                 m.number));
  50                     }
  51
  52                     return recipientResolver.resolveRecipient(m.recipientId);
  53                 }).filter(Objects::nonNull).collect(Collectors.toSet());
  54
  55                 return new GroupInfoV1(GroupIdV1.fromBase64(g1.groupId),
  56                         g1.expectedV2Id == null ? null : GroupIdV2.fromBase64(g1.expectedV2Id),
  57                         g1.name,
  58                         members,
  59                         g1.color,
  60                         g1.messageExpirationTime,
  61                         g1.blocked,
  62                         g1.archived,
  63                         null);
  64             }
  65
  66             final var g2 = (Storage.GroupV2) g;
  67             var groupId = GroupIdV2.fromBase64(g2.groupId);
  68             GroupMasterKey masterKey;
  69             try {
  70                 masterKey = new GroupMasterKey(Base64.getDecoder().decode(g2.masterKey));
  71             } catch (InvalidInputException | IllegalArgumentException e) {
  72                 throw new AssertionError("Invalid master key for group " + groupId.toBase64());
  73             }
  74
  75             return new GroupInfoV2(groupId,
  76                     masterKey,
  77                     loadDecryptedGroupLocked(groupId, groupCachePath),
  78                     g2.distributionId == null ? DistributionId.create() : DistributionId.from(g2.distributionId),
  79                     g2.blocked,
  80                     g2.permissionDenied,
  81                     null,
  82                     recipientResolver);
  83         }).toList();
  84
  85         groupStore.addLegacyGroups(groups);
  86         removeGroupCache(groupCachePath);
  87     }
  88
  89     private static void removeGroupCache(File groupCachePath) {
  90         final var files = groupCachePath.listFiles();
  91         if (files == null) {
  92             return;
  93         }
  94
  95         for (var file : files) {
  96             try {
  97                 Files.delete(file.toPath());
  98             } catch (IOException e) {
  99                 logger.error("Failed to delete group cache file {}: {}", file, e.getMessage());
 100             }
 101         }
 102         try {
 103             Files.delete(groupCachePath.toPath());
 104         } catch (IOException e) {
 105             logger.error("Failed to delete group cache directory {}: {}", groupCachePath, e.getMessage());
 106         }
 107     }
 108
 109     private static DecryptedGroup loadDecryptedGroupLocked(final GroupIdV2 groupIdV2, final File groupCachePath) {
 110         var groupFile = getGroupV2File(groupIdV2, groupCachePath);
 111         if (!groupFile.exists()) {
 112             groupFile = getGroupV2FileLegacy(groupIdV2, groupCachePath);
 113         }
 114         if (!groupFile.exists()) {
 115             return null;
 116         }
 117         try (var stream = new FileInputStream(groupFile)) {
 118             return DecryptedGroup.ADAPTER.decode(stream);
 119         } catch (IOException ignored) {
 120             return null;
 121         }
 122     }
 123
 124     private static File getGroupV2FileLegacy(final GroupId groupId, final File groupCachePath) {
 125         return new File(groupCachePath, Hex.toStringCondensed(groupId.serialize()));
 126     }
 127
 128     private static File getGroupV2File(final GroupId groupId, final File groupCachePath) {
 129         return new File(groupCachePath, groupId.toBase64().replace("/", "_"));
 130     }
 131
 132     public record Storage(@JsonDeserialize(using = GroupsDeserializer.class) List<Record> groups) {
 133
 134         public record GroupV1(
 135                 String groupId,
 136                 String expectedV2Id,
 137                 String name,
 138                 String color,
 139                 int messageExpirationTime,
 140                 boolean blocked,
 141                 boolean archived,
 142                 @JsonDeserialize(using = MembersDeserializer.class) List<Member> members
 143         ) {
 144
 145             public record Member(Long recipientId, String uuid, String number) {}
 146
 147             public record JsonRecipientAddress(String uuid, String number) {}
 148
 149             private static class MembersDeserializer extends JsonDeserializer<List<Member>> {
 150
 151                 @Override
 152                 public List<Member> deserialize(
 153                         JsonParser jsonParser, DeserializationContext deserializationContext
 154                 ) throws IOException {
 155                     var addresses = new ArrayList<Member>();
 156                     JsonNode node = jsonParser.getCodec().readTree(jsonParser);
 157                     for (var n : node) {
 158                         if (n.isTextual()) {
 159                             addresses.add(new Member(null, null, n.textValue()));
 160                         } else if (n.isNumber()) {
 161                             addresses.add(new Member(n.numberValue().longValue(), null, null));
 162                         } else {
 163                             var address = jsonParser.getCodec().treeToValue(n, JsonRecipientAddress.class);
 164                             addresses.add(new Member(null, address.uuid, address.number));
 165                         }
 166                     }
 167
 168                     return addresses;
 169                 }
 170             }
 171         }
 172
 173         public record GroupV2(
 174                 String groupId,
 175                 String masterKey,
 176                 String distributionId,
 177                 @JsonInclude(JsonInclude.Include.NON_DEFAULT) boolean blocked,
 178                 @JsonInclude(JsonInclude.Include.NON_DEFAULT) boolean permissionDenied
 179         ) {}
 180     }
 181
 182     private static class GroupsDeserializer extends JsonDeserializer<List<Object>> {
 183
 184         @Override
 185         public List<Object> deserialize(
 186                 JsonParser jsonParser, DeserializationContext deserializationContext
 187         ) throws IOException {
 188             var groups = new ArrayList<>();
 189             JsonNode node = jsonParser.getCodec().readTree(jsonParser);
 190             for (var n : node) {
 191                 Object g;
 192                 if (n.hasNonNull("masterKey")) {
 193                     // a v2 group
 194                     g = jsonParser.getCodec().treeToValue(n, Storage.GroupV2.class);
 195                 } else {
 196                     g = jsonParser.getCodec().treeToValue(n, Storage.GroupV1.class);
 197                 }
 198                 groups.add(g);
 199             }
 200
 201             return groups;
 202         }
 203     }
 204 }