func (c *Client) commandSender(sender ircx.Sender, to string, enc bool) func(s string, a ...interface{}) {
return func(s string, a ...interface{}) {
if s == "" {
return
}
msg := s
if len(a) > 0 {
msg = fmt.Sprintf(msg, a...)
}
if enc {
if key, ok := c.state.Encryption().Check(to); ok {
data, err := dh1080.Enc([]byte(msg), []byte(key))
if err == nil {
msg = "+OK *" + base64.StdEncoding.EncodeToString(data)
}
}
}
newMsg := &irc.Message{
Command: irc.PRIVMSG,
Params: []string{to},
Trailing: msg,
}
sender.Send(newMsg)
}
}
func (c *Client) encryptionStartHandler(s ircx.Sender, m *irc.Message) {
data := strings.Split(m.Trailing, " ")
if len(data) < 2 {
return
}
if data[0] == "DH1080_INIT" {
enc := dh1080.New()
err := enc.Unpack(m.Trailing)
data, err := enc.Pack()
if err != nil {
return
}
msg := &irc.Message{
Command: irc.NOTICE,
Params: []string{m.Name},
Trailing: data + " CBC",
}
s.Send(msg)
secret, err := enc.GetSecret()
if err != nil {
msg := &irc.Message{
Command: irc.PRIVMSG,
Params: []string{m.Name},
Trailing: "I couldn't create the key for our chat, I won't be understanding your encrypted messages",
}
s.Send(msg)
} else {
c.state.Encryption().New(m.Name, secret)
time.Sleep(1 * time.Second) // wait for their client to get situated
out := fmt.Sprintf("I've stared an encrypted chat, just message %s to remove our group key", encOff)
encryptedMessage, err := dh1080.Enc([]byte(out), []byte(secret))
if err != nil {
return
}
encryptedBaseMessage := base64.StdEncoding.EncodeToString(encryptedMessage)
infoMessage := &irc.Message{
Command: irc.PRIVMSG,
Params: []string{m.Name},
Trailing: "+OK *" + encryptedBaseMessage,
}
s.Send(infoMessage)
}
}
}