func NewServer() (err error) {
// An SSH server is represented by a ServerConfig, which holds
// certificate details and handles authentication of ServerConns.
config := new(ssh.ServerConfig)
config.PublicKeyCallback = HandlePublicKeyCallback
config.AuthLogCallback = HandleAuthLogCallback
key, err := osext.ReadHostKeys(HostKeysDir)
if err != nil {
return
}
for _, v := range key {
signer, err := ssh.ParsePrivateKey(v)
if err != nil {
return err
}
config.AddHostKey(signer)
}
// Once a ServerConfig has been configured, connections can be
// accepted.
conn, err := net.Listen("tcp", ":22")
if err != nil {
log.Fatal("Failed to listen for connection: ", err)
}
for {
sConn, err := conn.Accept()
if err != nil {
log.Printf("conn.Accept: %s", err)
continue
}
sshconn, chans, reqs, err := ssh.NewServerConn(sConn, config)
if err != nil {
log.Printf("ssh.NewServerConn: Failed to handshake: %s", err)
continue
}
// The incoming Request channel must be serviced.
go ssh.DiscardRequests(reqs)
// Handle the incomming request
go HandleServerConn(sshconn, chans)
}
}
