jshiffer/matterbridge
1
0
Fork 1
mirror of https://github.com/42wim/matterbridge.git synced 2024-11-21 10:12:00 -08:00
Code Issues Actions Packages Projects Releases Wiki Activity

Fix panic by checking slice bounds in handleEntities (telegram). Fixes #857 (#858)

Browse Source 
Besides the bound checking, this now also use utf16 as suggested by
https://github.com/go-telegram-bot-api/telegram-bot-api/issues/231
This commit is contained in:
Wim 2019-07-08 22:19:45 +02:00 committed by GitHub
parent e60949ff3f
commit 1fb91c6316
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
bridge/telegram/handlers.go
View File

@ -5,10 +5,11 @@ import (
"regexp"
"strconv"
"strings"
"unicode/utf16"
"github.com/42wim/matterbridge/bridge/config"
"github.com/42wim/matterbridge/bridge/helper"
"github.com/go-telegram-bot-api/telegram-bot-api"
tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api"
)
func (b *Btelegram) handleUpdate(rmsg *config.Message, message, posted, edited *tgbotapi.Message) *tgbotapi.Message {
@ -375,8 +376,13 @@ func (b *Btelegram) handleEntities(rmsg *config.Message, message *tgbotapi.Messa
b.Log.Errorf("entity text_link url parse failed: %s", err)
continue
}
link := rmsg.Text[e.Offset : e.Offset+e.Length]
rmsg.Text = strings.Replace(rmsg.Text, link, url.String(), 1)
utfEncodedString := utf16.Encode([]rune(rmsg.Text))
if e.Offset+e.Length > len(utfEncodedString) {
b.Log.Errorf("entity length is too long %d > %d", e.Offset+e.Length, len(utfEncodedString))
continue
}
link := utf16.Decode(utfEncodedString[e.Offset : e.Offset+e.Length])
rmsg.Text = strings.Replace(rmsg.Text, string(link), url.String(), 1)
}
}
}