fix: encrypt community's Categories and ActiveMembersCount

fixes: #4943
fixes: #4944

protocol/communities/community.go

@@ -1427,6 +1427,17 @@ func (o *Community) Description() *protobuf.CommunityDescription {
 	return o.config.CommunityDescription
 }
 
+func (o *Community) EncryptedDescription() (*protobuf.CommunityDescription, error) {
+	clone := proto.Clone(o.config.CommunityDescription).(*protobuf.CommunityDescription)
+	if o.encryptor != nil {
+		err := encryptDescription(o.encryptor, o, clone)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return clone, nil
+}
+
 func (o *Community) DescriptionProtocolMessage() []byte {
 	return o.config.CommunityDescriptionProtocolMessage
 }

protocol/communities/community_description_encryption.go

@@ -1,8 +1,6 @@
 package communities
 
 import (
-	"github.com/golang/protobuf/proto"
-
 	"go.uber.org/zap"
 
 	"github.com/status-im/status-go/eth-node/types"
@@ -26,7 +24,7 @@ func encryptDescription(encryptor DescriptionEncryptor, community *Community, de
 
 		descriptionToEncrypt := &protobuf.CommunityDescription{
 			Chats: map[string]*protobuf.CommunityChat{
-				channelID: proto.Clone(channel).(*protobuf.CommunityChat),
+				channelID: channel,
 			},
 		}
 
@@ -43,7 +41,9 @@ func encryptDescription(encryptor DescriptionEncryptor, community *Community, de
 	if community.Encrypted() {
 		descriptionToEncrypt := &protobuf.CommunityDescription{
 			Members:            description.Members,
+			ActiveMembersCount: description.ActiveMembersCount,
 			Chats:              description.Chats,
+			Categories:         description.Categories,
 		}
 
 		keyIDSeqNo, encryptedDescription, err := encryptor.encryptCommunityDescription(community, descriptionToEncrypt)
@@ -51,10 +51,12 @@ func encryptDescription(encryptor DescriptionEncryptor, community *Community, de
 			return err
 		}
 
-		// Set private data and cleanup unencrypted members and chats
+		// Set private data and cleanup unencrypted members, chats and categories
 		description.PrivateData[keyIDSeqNo] = encryptedDescription
 		description.Members = make(map[string]*protobuf.CommunityMember)
+		description.ActiveMembersCount = 0
 		description.Chats = make(map[string]*protobuf.CommunityChat)
+		description.Categories = make(map[string]*protobuf.CommunityCategory)
 	}
 
 	return nil
@@ -85,11 +87,12 @@ func decryptDescription(id types.HexBytes, encryptor DescriptionEncryptor, descr
 		}
 		decryptedDescription := decryptedDescriptionResponse.Description
 
-		for pk, member := range decryptedDescription.Members {
+		if len(decryptedDescription.Members) > 0 {
-			if description.Members == nil {
+			description.Members = decryptedDescription.Members
-				description.Members = make(map[string]*protobuf.CommunityMember)
 		}
-			description.Members[pk] = member
+
+		if decryptedDescription.ActiveMembersCount > 0 {
+			description.ActiveMembersCount = decryptedDescription.ActiveMembersCount
 		}
 
 		for id, decryptedChannel := range decryptedDescription.Chats {
@@ -98,13 +101,17 @@ func decryptDescription(id types.HexBytes, encryptor DescriptionEncryptor, descr
 			}
 
 			if channel := description.Chats[id]; channel != nil {
-				if len(channel.Members) == 0 {
+				if len(decryptedChannel.Members) > 0 {
 					channel.Members = decryptedChannel.Members
 				}
 			} else {
 				description.Chats[id] = decryptedChannel
 			}
 		}
+
+		if len(decryptedDescription.Categories) > 0 {
+			description.Categories = decryptedDescription.Categories
+		}
 	}
 
 	return failedToDecrypt, nil

protocol/communities/community_description_encryption_test.go

@@ -50,13 +50,13 @@ type DescriptionEncryptorMock struct {
 
 func (dem *DescriptionEncryptorMock) encryptCommunityDescription(community *Community, d *protobuf.CommunityDescription) (string, []byte, error) {
 	keyIDSeqNo := uuid.New().String()
-	dem.descriptions[keyIDSeqNo] = d
+	dem.descriptions[keyIDSeqNo] = proto.Clone(d).(*protobuf.CommunityDescription)
 	return keyIDSeqNo, []byte("encryptedDescription"), nil
 }
 
 func (dem *DescriptionEncryptorMock) encryptCommunityDescriptionChannel(community *Community, channelID string, d *protobuf.CommunityDescription) (string, []byte, error) {
 	keyIDSeqNo := uuid.New().String()
-	dem.descriptions[keyIDSeqNo] = d
+	dem.descriptions[keyIDSeqNo] = proto.Clone(d).(*protobuf.CommunityDescription)
 	dem.channelIDToKeyIDSeqNo[channelID] = keyIDSeqNo
 	return keyIDSeqNo, []byte("encryptedDescription"), nil
 }
@@ -86,6 +86,7 @@ func (s *CommunityEncryptionDescriptionSuite) description() *protobuf.CommunityD
 			"memberA": &protobuf.CommunityMember{},
 			"memberB": &protobuf.CommunityMember{},
 		},
+		ActiveMembersCount: 1,
 		Chats: map[string]*protobuf.CommunityChat{
 			"channelA": &protobuf.CommunityChat{
 				Members: map[string]*protobuf.CommunityMember{
@@ -99,6 +100,13 @@ func (s *CommunityEncryptionDescriptionSuite) description() *protobuf.CommunityD
 				},
 			},
 		},
+		Categories: map[string]*protobuf.CommunityCategory{
+			"categoryA": &protobuf.CommunityCategory{
+				CategoryId: "categoryA",
+				Name:       "categoryA",
+				Position:   0,
+			},
+		},
 		PrivateData: map[string][]byte{},
 
 		// ensure community and channel encryption
@@ -128,18 +136,23 @@ func (s *CommunityEncryptionDescriptionSuite) TestEncryptionDecryption() {
 	s.Require().NoError(err)
 	s.Require().Len(description.PrivateData, 2)
 
-	// members and chats should become empty (encrypted)
+	// members, chats, categories should become empty (encrypted)
 	s.Require().Empty(description.Members)
+	s.Require().Empty(description.ActiveMembersCount)
 	s.Require().Empty(description.Chats)
+	s.Require().Empty(description.Categories)
 	s.Require().Equal(description.IntroMessage, "one of not encrypted fields")
 
 	// members and chats should be brought back
 	_, err = decryptDescription([]byte("some-id"), s.descriptionEncryptor, description, s.logger)
 	s.Require().NoError(err)
 	s.Require().Len(description.Members, 2)
+	s.Require().EqualValues(description.ActiveMembersCount, 1)
 	s.Require().Len(description.Chats, 2)
 	s.Require().Len(description.Chats["channelA"].Members, 2)
 	s.Require().Len(description.Chats["channelB"].Members, 1)
+	s.Require().Len(description.Categories, 1)
+	s.Require().Equal(description.Categories["categoryA"].Name, "categoryA")
 	s.Require().Equal(description.IntroMessage, "one of not encrypted fields")
 }
 
@@ -163,19 +176,24 @@ func (s *CommunityEncryptionDescriptionSuite) TestDecryption_NoKeys() {
 	_, err := decryptDescription([]byte("some-id"), s.descriptionEncryptor, description, s.logger)
 	s.Require().NoError(err)
 	s.Require().Len(description.Members, 2)
+	s.Require().EqualValues(description.ActiveMembersCount, 1)
 	s.Require().Len(description.Chats, 2)
 	s.Require().Len(description.Chats["channelA"].Members, 2)
 	s.Require().Len(description.Chats["channelB"].Members, 0) // encrypted channel
+	s.Require().Len(description.Categories, 1)
+	s.Require().Equal(description.Categories["categoryA"].Name, "categoryA")
 	s.Require().Equal(description.IntroMessage, "one of not encrypted fields")
 
 	description = proto.Clone(encryptedDescription).(*protobuf.CommunityDescription)
-	// forget the keys, so chats and members can't be decrypted
+	// forget the keys, so members, chats, categories can't be decrypted
 	s.descriptionEncryptor.forgetAllKeys()
 
-	// members and chats should be empty
+	// members, chats, categories should be empty
 	_, err = decryptDescription([]byte("some-id"), s.descriptionEncryptor, description, s.logger)
 	s.Require().NoError(err)
 	s.Require().Empty(description.Members)
+	s.Require().Empty(description.ActiveMembersCount)
 	s.Require().Empty(description.Chats)
+	s.Require().Empty(description.Categories)
 	s.Require().Equal(description.IntroMessage, "one of not encrypted fields")
 }

protocol/messenger_communities.go

@@ -1550,11 +1550,16 @@ func (m *Messenger) acceptRequestToJoinCommunity(requestToJoin *communities.Requ
 			}
 		}
 
+		encryptedDescription, err := community.EncryptedDescription()
+		if err != nil {
+			return nil, err
+		}
+
 		requestToJoinResponseProto := &protobuf.CommunityRequestToJoinResponse{
 			Clock:                    community.Clock(),
 			Accepted:                 true,
 			CommunityId:              community.ID(),
-			Community:                community.Description(),
+			Community:                encryptedDescription,
 			Grant:                    grant,
 			ProtectedTopicPrivateKey: crypto.FromECDSA(key),
 			Shard:                    community.Shard().Protobuffer(),