func initialize() {
privkey_fname := util.AppBaseFileName() + ".privkey"
privkey_bytes, err := ioutil.ReadFile(privkey_fname)
if err != nil {
log.Panicf("privkey load error: %s", err)
}
signer, err := ssh.ParsePrivateKey(privkey_bytes)
if err != nil {
log.Panicf("privkey parse error: %s", err)
}
clientConfig = &ssh.ClientConfig{
User: username,
Auth: []ssh.AuthMethod{
ssh.PublicKeys(signer),
},
}
hostlist_fname := util.AppBaseFileName() + ".hostlist"
f, err := os.Open(hostlist_fname)
if err != nil {
log.Panicf("hostlist open error: %s", err)
}
defer f.Close()
scanner := bufio.NewScanner(f)
scanner.Split(bufio.ScanLines)
for scanner.Scan() {
hostlist = append(hostlist, scanner.Text())
}
}
func AppConfig() (*Config, error) {
cfg_fname := util.AppBaseFileName() + ".config.json"
log.Println("config : ", cfg_fname)
cf, err := load(cfg_fname)
if err != nil {
log.Fatalln("config load error: ", err)
return nil, err // unreachable
}
return cf, nil
}
func serve() {
config := &ssh.ServerConfig{
PasswordCallback: passwordCallback,
PublicKeyCallback: pubkeyCallback,
}
priv_fname := util.AppBaseFileName() + ".privkey"
log.Print("loading private key from " + priv_fname + " ...")
priv_bytes, err := ioutil.ReadFile(priv_fname)
if err != nil {
log.Panicln("private key read error:", err)
}
log.Print("parsing private key...")
private, err := ssh.ParsePrivateKey(priv_bytes)
if err != nil {
log.Panicln("private key parse error:", err)
}
log.Print("key fingerprint:", fingerprintKey(private.PublicKey()))
log.Print("adding private key to host...")
config.AddHostKey(private)
log.Println("creating listener for", LISTEN_HOST_AND_PORT, " ...")
listener, err := net.Listen("tcp", LISTEN_HOST_AND_PORT)
log.Println("entering in the main service loop ...")
for {
conn, err := listener.Accept()
if err != nil {
log.Println("Failed to accept incoming connection:", err)
continue
}
log.Println("new connection accepted from", conn.RemoteAddr())
log.Println("upgrading connection to ssh...")
sshConn, chans, reqs, err := ssh.NewServerConn(conn, config)
if err != nil {
log.Println("handshake failed:", err)
continue
}
log.Printf("New SSH connection from %s (%s)", sshConn.RemoteAddr(), sshConn.ClientVersion())
go ssh.DiscardRequests(reqs)
go handleChannels(chans)
}
}