Add support for Mac Roman character encoding.

[rbdr/mobius] / hotline / transaction_handlers.go

diff --git a/hotline/transaction_handlers.go b/hotline/transaction_handlers.go
index 137b2a0583ce2288f180cc07f37a572b1654360e..931340e5c4f94edd88b4914d479a2f4cdd349b2e 100644 (file)
--- a/hotline/transaction_handlers.go
+++ b/hotline/transaction_handlers.go
@@ -305,7 +305,7 @@ func HandleChatSend(cc *ClientConn, t *Transaction) (res []Transaction, err erro
 func HandleSendInstantMsg(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
        if !cc.Authorize(accessSendPrivMsg) {
                res = append(res, cc.NewErrReply(t, "You are not allowed to send private messages."))
-               return res, err
+               return res, errors.New("user is not allowed to send private messages")
        }
 
        msg := t.GetField(FieldData)
@@ -326,7 +326,10 @@ func HandleSendInstantMsg(cc *ClientConn, t *Transaction) (res []Transaction, er
                reply.Fields = append(reply.Fields, NewField(FieldQuotingMsg, t.GetField(FieldQuotingMsg).Data))
        }
 
-       id, _ := byteToInt(ID.Data)
+       id, err := byteToInt(ID.Data)
+       if err != nil {
+               return res, errors.New("invalid client ID")
+       }
        otherClient, ok := cc.Server.Clients[uint16(id)]
        if !ok {
                return res, errors.New("invalid client ID")
@@ -334,7 +337,7 @@ func HandleSendInstantMsg(cc *ClientConn, t *Transaction) (res []Transaction, er
 
        // Check if target user has "Refuse private messages" flag
        flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(otherClient.Flags)))
-       if flagBitmap.Bit(userFLagRefusePChat) == 1 {
+       if flagBitmap.Bit(UserFlagRefusePChat) == 1 {
                res = append(res,
                        *NewTransaction(
                                TranServerMsg,
@@ -382,8 +385,13 @@ func HandleGetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err e
                return res, err
        }
 
+       encodedName, err := txtEncoder.String(fw.name)
+       if err != nil {
+               return res, fmt.Errorf("invalid filepath encoding: %w", err)
+       }
+
        res = append(res, cc.NewReply(t,
-               NewField(FieldFileName, []byte(fw.name)),
+               NewField(FieldFileName, []byte(encodedName)),
                NewField(FieldFileTypeString, fw.ffo.FlatFileInformationFork.friendlyType()),
                NewField(FieldFileCreatorString, fw.ffo.FlatFileInformationFork.friendlyCreator()),
                NewField(FieldFileComment, fw.ffo.FlatFileInformationFork.Comment),
@@ -475,7 +483,11 @@ func HandleSetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err e
                        if err != nil {
                                return nil, err
                        }
-                       hlFile.name = string(fileNewName)
+                       hlFile.name, err = txtDecoder.String(string(fileNewName))
+                       if err != nil {
+                               return res, fmt.Errorf("invalid filepath encoding: %w", err)
+                       }
+
                        err = hlFile.move(fileDir)
                        if os.IsNotExist(err) {
                                res = append(res, cc.NewErrReply(t, "Cannot rename file "+string(fileName)+" because it does not exist or cannot be found."))
@@ -563,9 +575,6 @@ func HandleMoveFile(cc *ClientConn, t *Transaction) (res []Transaction, err erro
                res = append(res, cc.NewErrReply(t, "Cannot delete file "+fileName+" because it does not exist or cannot be found."))
                return res, err
        }
-       if err != nil {
-               return res, err
-       }
        switch mode := fi.Mode(); {
        case mode.IsDir():
                if !cc.Authorize(accessMoveFolder) {
@@ -611,6 +620,10 @@ func HandleNewFolder(cc *ClientConn, t *Transaction) (res []Transaction, err err
                }
        }
        newFolderPath := path.Join(cc.Server.Config.FileRoot, subPath, folderName)
+       newFolderPath, err = txtDecoder.String(newFolderPath)
+       if err != nil {
+               return res, fmt.Errorf("invalid filepath encoding: %w", err)
+       }
 
        // TODO: check path and folder name lengths
 
@@ -619,8 +632,6 @@ func HandleNewFolder(cc *ClientConn, t *Transaction) (res []Transaction, err err
                return []Transaction{cc.NewErrReply(t, msg)}, nil
        }
 
-       // TODO: check for disallowed characters to maintain compatibility for original client
-
        if err := cc.Server.FS.Mkdir(newFolderPath, 0777); err != nil {
                msg := fmt.Sprintf("Cannot create folder \"%s\" because an error occurred.", folderName)
                return []Transaction{cc.NewErrReply(t, msg)}, nil
@@ -636,7 +647,7 @@ func HandleSetUser(cc *ClientConn, t *Transaction) (res []Transaction, err error
                return res, err
        }
 
-       login := DecodeUserString(t.GetField(FieldUserLogin).Data)
+       login := decodeString(t.GetField(FieldUserLogin).Data)
        userName := string(t.GetField(FieldUserName).Data)
 
        newAccessLvl := t.GetField(FieldUserAccess).Data
@@ -671,9 +682,9 @@ func HandleSetUser(cc *ClientConn, t *Transaction) (res []Transaction, err error
 
                        flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(c.Flags)))
                        if c.Authorize(accessDisconUser) {
-                               flagBitmap.SetBit(flagBitmap, userFlagAdmin, 1)
+                               flagBitmap.SetBit(flagBitmap, UserFlagAdmin, 1)
                        } else {
-                               flagBitmap.SetBit(flagBitmap, userFlagAdmin, 0)
+                               flagBitmap.SetBit(flagBitmap, UserFlagAdmin, 0)
                        }
                        binary.BigEndian.PutUint16(c.Flags, uint16(flagBitmap.Int64()))
 
@@ -707,7 +718,7 @@ func HandleGetUser(cc *ClientConn, t *Transaction) (res []Transaction, err error
 
        res = append(res, cc.NewReply(t,
                NewField(FieldUserName, []byte(account.Name)),
-               NewField(FieldUserLogin, negateString(t.GetField(FieldUserLogin).Data)),
+               NewField(FieldUserLogin, encodeString(t.GetField(FieldUserLogin).Data)),
                NewField(FieldUserPassword, []byte(account.Password)),
                NewField(FieldUserAccess, account.Access[:]),
        ))
@@ -752,7 +763,7 @@ func HandleUpdateUser(cc *ClientConn, t *Transaction) (res []Transaction, err er
                }
 
                if len(subFields) == 1 {
-                       login := DecodeUserString(getField(FieldData, &subFields).Data)
+                       login := decodeString(getField(FieldData, &subFields).Data)
                        cc.logger.Infow("DeleteUser", "login", login)
 
                        if !cc.Authorize(accessDeleteUser) {
@@ -766,7 +777,7 @@ func HandleUpdateUser(cc *ClientConn, t *Transaction) (res []Transaction, err er
                        continue
                }
 
-               login := DecodeUserString(getField(FieldUserLogin, &subFields).Data)
+               login := decodeString(getField(FieldUserLogin, &subFields).Data)
 
                // check if the login dataFile; if so, we know we are updating an existing user
                if acc, ok := cc.Server.Accounts[login]; ok {
@@ -790,8 +801,8 @@ func HandleUpdateUser(cc *ClientConn, t *Transaction) (res []Transaction, err er
                        }
 
                        err = cc.Server.UpdateUser(
-                               DecodeUserString(getField(FieldData, &subFields).Data),
-                               DecodeUserString(getField(FieldUserLogin, &subFields).Data),
+                               decodeString(getField(FieldData, &subFields).Data),
+                               decodeString(getField(FieldUserLogin, &subFields).Data),
                                string(getField(FieldUserName, &subFields).Data),
                                acc.Password,
                                acc.Access,
@@ -837,7 +848,7 @@ func HandleNewUser(cc *ClientConn, t *Transaction) (res []Transaction, err error
                return res, err
        }
 
-       login := DecodeUserString(t.GetField(FieldUserLogin).Data)
+       login := decodeString(t.GetField(FieldUserLogin).Data)
 
        // If the account already dataFile, reply with an error
        if _, ok := cc.Server.Accounts[login]; ok {
@@ -873,7 +884,7 @@ func HandleDeleteUser(cc *ClientConn, t *Transaction) (res []Transaction, err er
        }
 
        // TODO: Handle case where account doesn't exist; e.g. delete race condition
-       login := DecodeUserString(t.GetField(FieldUserLogin).Data)
+       login := decodeString(t.GetField(FieldUserLogin).Data)
 
        if err := cc.Server.DeleteUser(login); err != nil {
                return res, err
@@ -955,13 +966,13 @@ func HandleTranAgreed(cc *ClientConn, t *Transaction) (res []Transaction, err er
 
        // Check refuse private PM option
        if optBitmap.Bit(refusePM) == 1 {
-               flagBitmap.SetBit(flagBitmap, userFlagRefusePM, 1)
+               flagBitmap.SetBit(flagBitmap, UserFlagRefusePM, 1)
                binary.BigEndian.PutUint16(cc.Flags, uint16(flagBitmap.Int64()))
        }
 
        // Check refuse private chat option
        if optBitmap.Bit(refuseChat) == 1 {
-               flagBitmap.SetBit(flagBitmap, userFLagRefusePChat, 1)
+               flagBitmap.SetBit(flagBitmap, UserFlagRefusePChat, 1)
                binary.BigEndian.PutUint16(cc.Flags, uint16(flagBitmap.Int64()))
        }
 
@@ -1015,7 +1026,7 @@ func HandleTranOldPostNews(cc *ClientConn, t *Transaction) (res []Transaction, e
        }
 
        newsPost := fmt.Sprintf(newsTemplate+"\r", cc.UserName, time.Now().Format(newsDateTemplate), t.GetField(FieldData).Data)
-       newsPost = strings.Replace(newsPost, "\n", "\r", -1)
+       newsPost = strings.ReplaceAll(newsPost, "\n", "\r")
 
        // update news in memory
        cc.Server.FlatNews = append([]byte(newsPost), cc.Server.FlatNews...)
@@ -1066,7 +1077,6 @@ func HandleDisconnectUser(cc *ClientConn, t *Transaction) (res []Transaction, er
 
                        banUntil := time.Now().Add(tempBanDuration)
                        cc.Server.banList[strings.Split(clientConn.RemoteAddr, ":")[0]] = &banUntil
-                       cc.Server.writeBanList()
                case 2:
                        // send message: "You are permanently banned on this server"
                        cc.logger.Infow("Disconnect & ban " + string(clientConn.UserName))
@@ -1079,7 +1089,11 @@ func HandleDisconnectUser(cc *ClientConn, t *Transaction) (res []Transaction, er
                        ))
 
                        cc.Server.banList[strings.Split(clientConn.RemoteAddr, ":")[0]] = nil
-                       cc.Server.writeBanList()
+               }
+
+               err := cc.Server.writeBanList()
+               if err != nil {
+                       return res, err
                }
        }
 
@@ -1644,10 +1658,10 @@ func HandleSetClientUserInfo(cc *ClientConn, t *Transaction) (res []Transaction,
                optBitmap := big.NewInt(int64(binary.BigEndian.Uint16(options)))
                flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(cc.Flags)))
 
-               flagBitmap.SetBit(flagBitmap, userFlagRefusePM, optBitmap.Bit(refusePM))
+               flagBitmap.SetBit(flagBitmap, UserFlagRefusePM, optBitmap.Bit(refusePM))
                binary.BigEndian.PutUint16(cc.Flags, uint16(flagBitmap.Int64()))
 
-               flagBitmap.SetBit(flagBitmap, userFLagRefusePChat, optBitmap.Bit(refuseChat))
+               flagBitmap.SetBit(flagBitmap, UserFlagRefusePChat, optBitmap.Bit(refuseChat))
                binary.BigEndian.PutUint16(cc.Flags, uint16(flagBitmap.Int64()))
 
                // Check auto response
@@ -1742,7 +1756,7 @@ func HandleInviteNewChat(cc *ClientConn, t *Transaction) (res []Transaction, err
        targetClient := cc.Server.Clients[binary.BigEndian.Uint16(targetID)]
 
        flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(targetClient.Flags)))
-       if flagBitmap.Bit(userFLagRefusePChat) == 1 {
+       if flagBitmap.Bit(UserFlagRefusePChat) == 1 {
                res = append(res,
                        *NewTransaction(
                                TranServerMsg,