70 lines
1.3 KiB
Go
70 lines
1.3 KiB
Go
package main
|
|
|
|
import (
|
|
"crypto/rand"
|
|
"crypto/rsa"
|
|
"errors"
|
|
"log"
|
|
"net"
|
|
"os"
|
|
"time"
|
|
|
|
"golang.org/x/crypto/ssh"
|
|
)
|
|
|
|
var (
|
|
errBadPassword = errors.New("permission denied")
|
|
serverVersions = []string{
|
|
"SSH-2.0-OpenSSH_9.9",
|
|
}
|
|
)
|
|
|
|
func main() {
|
|
if len(os.Args) > 1 {
|
|
dbPath = os.Args[1] + "/sqlite.db"
|
|
}
|
|
|
|
initDB()
|
|
defer db.Close()
|
|
|
|
serverConfig := &ssh.ServerConfig{
|
|
MaxAuthTries: 6,
|
|
PasswordCallback: passwordCallback,
|
|
ServerVersion: serverVersions[0],
|
|
}
|
|
|
|
privateKey, _ := rsa.GenerateKey(rand.Reader, 2048)
|
|
signer, _ := ssh.NewSignerFromSigner(privateKey)
|
|
serverConfig.AddHostKey(signer)
|
|
|
|
listener, err := net.Listen("tcp", ":22")
|
|
if err != nil {
|
|
log.Fatal("Failed to listen:", err)
|
|
return
|
|
}
|
|
defer listener.Close()
|
|
|
|
for {
|
|
conn, err := listener.Accept()
|
|
if err != nil {
|
|
log.Fatal("Failed to accept:", err)
|
|
break
|
|
}
|
|
go handleConn(conn, serverConfig)
|
|
}
|
|
}
|
|
|
|
func passwordCallback(conn ssh.ConnMetadata, password []byte) (*ssh.Permissions, error) {
|
|
log.Println(conn.RemoteAddr(), string(conn.ClientVersion()), conn.User(), string(password))
|
|
logLogin(conn, password)
|
|
time.Sleep(100 * time.Millisecond)
|
|
return nil, errBadPassword
|
|
}
|
|
|
|
func handleConn(conn net.Conn, serverConfig *ssh.ServerConfig) {
|
|
defer conn.Close()
|
|
log.Println(conn.RemoteAddr())
|
|
logConnect(conn)
|
|
ssh.NewServerConn(conn, serverConfig)
|
|
}
|