Extract lib module

[signal-cli] / src / main / java / org / asamk / signal / manager / groups / GroupUtils.java

diff --git a/src/main/java/org/asamk/signal/manager/groups/GroupUtils.java b/src/main/java/org/asamk/signal/manager/groups/GroupUtils.java
deleted file mode 100644 (file)
index f56639e..0000000
--- a/src/main/java/org/asamk/signal/manager/groups/GroupUtils.java
+++ /dev/null
@@ -1,68 +0,0 @@
-package org.asamk.signal.manager.groups;
-
-import org.asamk.signal.manager.storage.groups.GroupInfo;
-import org.asamk.signal.manager.storage.groups.GroupInfoV1;
-import org.asamk.signal.manager.storage.groups.GroupInfoV2;
-import org.signal.zkgroup.InvalidInputException;
-import org.signal.zkgroup.groups.GroupMasterKey;
-import org.signal.zkgroup.groups.GroupSecretParams;
-import org.whispersystems.libsignal.kdf.HKDFv3;
-import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
-import org.whispersystems.signalservice.api.messages.SignalServiceGroup;
-import org.whispersystems.signalservice.api.messages.SignalServiceGroupContext;
-import org.whispersystems.signalservice.api.messages.SignalServiceGroupV2;
-
-public class GroupUtils {
-
-    public static void setGroupContext(
-            final SignalServiceDataMessage.Builder messageBuilder, final GroupInfo groupInfo
-    ) {
-        if (groupInfo instanceof GroupInfoV1) {
-            SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.DELIVER)
-                    .withId(groupInfo.getGroupId().serialize())
-                    .build();
-            messageBuilder.asGroupMessage(group);
-        } else {
-            final GroupInfoV2 groupInfoV2 = (GroupInfoV2) groupInfo;
-            SignalServiceGroupV2 group = SignalServiceGroupV2.newBuilder(groupInfoV2.getMasterKey())
-                    .withRevision(groupInfoV2.getGroup() == null ? 0 : groupInfoV2.getGroup().getRevision())
-                    .build();
-            messageBuilder.asGroupMessage(group);
-        }
-    }
-
-    public static GroupId getGroupId(SignalServiceGroupContext context) {
-        if (context.getGroupV1().isPresent()) {
-            return GroupId.v1(context.getGroupV1().get().getGroupId());
-        } else if (context.getGroupV2().isPresent()) {
-            return getGroupIdV2(context.getGroupV2().get().getMasterKey());
-        } else {
-            return null;
-        }
-    }
-
-    public static GroupIdV2 getGroupIdV2(GroupSecretParams groupSecretParams) {
-        return GroupId.v2(groupSecretParams.getPublicParams().getGroupIdentifier().serialize());
-    }
-
-    public static GroupIdV2 getGroupIdV2(GroupMasterKey groupMasterKey) {
-        final GroupSecretParams groupSecretParams = GroupSecretParams.deriveFromMasterKey(groupMasterKey);
-        return getGroupIdV2(groupSecretParams);
-    }
-
-    public static GroupIdV2 getGroupIdV2(GroupIdV1 groupIdV1) {
-        final GroupSecretParams groupSecretParams = GroupSecretParams.deriveFromMasterKey(deriveV2MigrationMasterKey(
-                groupIdV1));
-        return getGroupIdV2(groupSecretParams);
-    }
-
-    private static GroupMasterKey deriveV2MigrationMasterKey(GroupIdV1 groupIdV1) {
-        try {
-            return new GroupMasterKey(new HKDFv3().deriveSecrets(groupIdV1.serialize(),
-                    "GV2 Migration".getBytes(),
-                    GroupMasterKey.SIZE));
-        } catch (InvalidInputException e) {
-            throw new AssertionError(e);
-        }
-    }
-}