/
main.go
106 lines (84 loc) · 2.21 KB
/
main.go
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package main
import (
"errors"
"flag"
"io/ioutil"
"log"
"net"
"strconv"
"github.com/BurntSushi/toml"
"github.com/Senior-Design-May1601/projectmain/logger"
"github.com/Senior-Design-May1601/Splunk/alert"
"golang.org/x/crypto/ssh"
)
type Config struct {
Address string
Port int
Key string
}
func readSecretKey(path string) ssh.Signer {
raw, err := ioutil.ReadFile(path)
if err != nil {
mylogger.Fatal(err)
}
sk, err := ssh.ParsePrivateKey(raw)
if err != nil {
mylogger.Fatal(err)
}
return sk
}
func baseAlertMap(metadata ssh.ConnMetadata) map[string]string {
meta := make(map[string]string)
meta["service"] = "ssh"
meta["user"] = metadata.User()
meta["remote"] = metadata.RemoteAddr().String()
meta["local"] = metadata.LocalAddr().String()
return meta
}
func keyAlert(metadata ssh.ConnMetadata, key ssh.PublicKey) string {
meta := baseAlertMap(metadata)
meta["authtype"] = "publickey"
meta["key"] = string(ssh.MarshalAuthorizedKey(key))
return alert.NewSplunkAlertMessage(meta)
}
func passwdAlert(metadata ssh.ConnMetadata, passwd []byte) string {
meta := baseAlertMap(metadata)
meta["authtype"] = "password"
meta["password"] = string(passwd)
return alert.NewSplunkAlertMessage(meta)
}
func keyHandler(meta ssh.ConnMetadata, key ssh.PublicKey) (*ssh.Permissions, error) {
mylogger.Println(keyAlert(meta, key))
return nil, errors.New("")
}
func passwdHandler(meta ssh.ConnMetadata, p []byte) (*ssh.Permissions, error) {
mylogger.Println(passwdAlert(meta, p))
return nil, errors.New("")
}
var mylogger *log.Logger
var config Config
func main() {
mylogger = logger.NewLogger("", 0)
configPath := flag.String("config", "", "fssh config file")
flag.Parse()
if _, err := toml.DecodeFile(*configPath, &config); err != nil {
mylogger.Fatal(err)
}
sshConfig := ssh.ServerConfig{
PublicKeyCallback: keyHandler,
PasswordCallback: passwdHandler,
}
sshConfig.AddHostKey(readSecretKey(config.Key))
s, err := net.Listen("tcp", config.Address+":"+strconv.Itoa(config.Port))
if err != nil {
mylogger.Fatal(err)
}
defer s.Close()
for {
c, err := s.Accept()
if err != nil {
mylogger.Fatal(err)
}
ssh.NewServerConn(c, &sshConfig)
}
}