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 final static 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.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             }
  64
  65             final var g2 = (Storage.GroupV2) g;
  66             var groupId = GroupIdV2.fromBase64(g2.groupId);
  67             GroupMasterKey masterKey;
  68             try {
  69                 masterKey = new GroupMasterKey(Base64.getDecoder().decode(g2.masterKey));
  70             } catch (InvalidInputException | IllegalArgumentException e) {
  71                 throw new AssertionError("Invalid master key for group " + groupId.toBase64());
  72             }
  73
  74             return new GroupInfoV2(groupId,
  75                     masterKey,
  76                     loadDecryptedGroupLocked(groupId, groupCachePath),
  77                     g2.distributionId == null ? DistributionId.create() : DistributionId.from(g2.distributionId),
  78                     g2.blocked,
  79                     g2.permissionDenied,
  80                     recipientResolver);
  81         }).toList();
  82
  83         groupStore.addLegacyGroups(groups);
  84         removeGroupCache(groupCachePath);
  85     }
  86
  87     private static void removeGroupCache(File groupCachePath) {
  88         final var files = groupCachePath.listFiles();
  89         if (files == null) {
  90             return;
  91         }
  92
  93         for (var file : files) {
  94             try {
  95                 Files.delete(file.toPath());
  96             } catch (IOException e) {
  97                 logger.error("Failed to delete group cache file {}: {}", file, e.getMessage());
  98             }
  99         }
 100         try {
 101             Files.delete(groupCachePath.toPath());
 102         } catch (IOException e) {
 103             logger.error("Failed to delete group cache directory {}: {}", groupCachePath, e.getMessage());
 104         }
 105     }
 106
 107     private static DecryptedGroup loadDecryptedGroupLocked(final GroupIdV2 groupIdV2, final File groupCachePath) {
 108         var groupFile = getGroupV2File(groupIdV2, groupCachePath);
 109         if (!groupFile.exists()) {
 110             groupFile = getGroupV2FileLegacy(groupIdV2, groupCachePath);
 111         }
 112         if (!groupFile.exists()) {
 113             return null;
 114         }
 115         try (var stream = new FileInputStream(groupFile)) {
 116             return DecryptedGroup.parseFrom(stream);
 117         } catch (IOException ignored) {
 118             return null;
 119         }
 120     }
 121
 122     private static File getGroupV2FileLegacy(final GroupId groupId, final File groupCachePath) {
 123         return new File(groupCachePath, Hex.toStringCondensed(groupId.serialize()));
 124     }
 125
 126     private static File getGroupV2File(final GroupId groupId, final File groupCachePath) {
 127         return new File(groupCachePath, groupId.toBase64().replace("/", "_"));
 128     }
 129
 130     public record Storage(@JsonDeserialize(using = GroupsDeserializer.class) List<Record> groups) {
 131
 132         public record GroupV1(
 133                 String groupId,
 134                 String expectedV2Id,
 135                 String name,
 136                 String color,
 137                 int messageExpirationTime,
 138                 boolean blocked,
 139                 boolean archived,
 140                 @JsonDeserialize(using = MembersDeserializer.class) List<Member> members
 141         ) {
 142
 143             public record Member(Long recipientId, String uuid, String number) {}
 144
 145             public record JsonRecipientAddress(String uuid, String number) {}
 146
 147             private static class MembersDeserializer extends JsonDeserializer<List<Member>> {
 148
 149                 @Override
 150                 public List<Member> deserialize(
 151                         JsonParser jsonParser, DeserializationContext deserializationContext
 152                 ) throws IOException {
 153                     var addresses = new ArrayList<Member>();
 154                     JsonNode node = jsonParser.getCodec().readTree(jsonParser);
 155                     for (var n : node) {
 156                         if (n.isTextual()) {
 157                             addresses.add(new Member(null, null, n.textValue()));
 158                         } else if (n.isNumber()) {
 159                             addresses.add(new Member(n.numberValue().longValue(), null, null));
 160                         } else {
 161                             var address = jsonParser.getCodec().treeToValue(n, JsonRecipientAddress.class);
 162                             addresses.add(new Member(null, address.uuid, address.number));
 163                         }
 164                     }
 165
 166                     return addresses;
 167                 }
 168             }
 169         }
 170
 171         public record GroupV2(
 172                 String groupId,
 173                 String masterKey,
 174                 String distributionId,
 175                 @JsonInclude(JsonInclude.Include.NON_DEFAULT) boolean blocked,
 176                 @JsonInclude(JsonInclude.Include.NON_DEFAULT) boolean permissionDenied
 177         ) {}
 178     }
 179
 180     private static class GroupsDeserializer extends JsonDeserializer<List<Object>> {
 181
 182         @Override
 183         public List<Object> deserialize(
 184                 JsonParser jsonParser, DeserializationContext deserializationContext
 185         ) throws IOException {
 186             var groups = new ArrayList<>();
 187             JsonNode node = jsonParser.getCodec().readTree(jsonParser);
 188             for (var n : node) {
 189                 Object g;
 190                 if (n.hasNonNull("masterKey")) {
 191                     // a v2 group
 192                     g = jsonParser.getCodec().treeToValue(n, Storage.GroupV2.class);
 193                 } else {
 194                     g = jsonParser.getCodec().treeToValue(n, Storage.GroupV1.class);
 195                 }
 196                 groups.add(g);
 197             }
 198
 199             return groups;
 200         }
 201     }
 202 }