package main import ( "fmt" "log" "os" "os/exec" "deadbeef.codes/steven/hyp/otphyp" ) func main() { if len(os.Args) < 2 { usage() } switch os.Args[1] { case "generatesecret": sharedSecret, err := otphyp.GenerateSecret() if err != nil { log.Fatalf("failed to generate shared secret: %v", err) } f, err := os.Create("hyp.secret") if err != nil { log.Fatalf("failed to create file 'hyp.secret': %v", err) } _, err = f.WriteString(sharedSecret) if err != nil { log.Fatalf("failed to write to file 'hyp.secret': %v", err) } f.Close() fmt.Println("Created file hyp.secret") case "server": secretBytes, err := os.ReadFile("hyp.secret") if err != nil { log.Fatalf("failed to read file 'hyp.secret': %v", err) } sharedSecret = string(secretBytes) if len(os.Args) < 3 { usage() } packetServer(os.Args[2]) } } func usage() { fmt.Print(`hyp Commands: generatesecret - creates a pre shared key file named hyp.secret which can be distributed to a trusted client server - TBD Example Usage: # Linux hyp server "/dev/eth0" # Windows - get-netadapter | where {$_.Name -eq “Ethernet”} | Select-Object -Property DeviceName hyp server "\\Device\\NPF_{A066F7DE-CC2D-4E4B-97C4-BF0EC4C03649}" `) os.Exit(1) } // TBD: Implement func handleSuccess(srcip string) { fmt.Println("Success for ", srcip) cmd := exec.Command("iptables", "-A", "INPUT", "-p", "tcp", "-s", srcip, "--dport", "22", "-j", "ACCEPT") err := cmd.Run() if err != nil { log.Printf("failed to execute iptables command for '%s': %v", srcip, err) } }