package main

import (
	"crypto/rand"
	"golang.org/x/crypto/curve25519"
	"golang.org/x/sys/windows"
	"golang.zx2c4.com/wireguard/windows/conf"
	"golang.zx2c4.com/wireguard/windows/tunnel"
	"log"
	"path/filepath"
	"unsafe"
)

//export InstallTunnelService
func InstallTunnelService(confPath string) {

}

//export CreateTunnelService
func CreateTunnelService(confFile16 *uint16) bool {
	confFile := windows.UTF16PtrToString(confFile16)
	conf.PresetRootDirectory(filepath.Dir(confFile))
	tunnel.UseFixedGUIDInsteadOfDeterministic = true
	err := tunnel.Run(confFile)
	if err != nil {
		log.Printf("Service run error: %v", err)
	}
	return err == nil
}

//export GenerateKeyPair
func GenerateKeypair(publicKey, privateKey *byte) {
	publicKeyArray := (*[32]byte)(unsafe.Pointer(publicKey))
	privateKeyArray := (*[32]byte)(unsafe.Pointer(privateKey))
	n, err := rand.Read(privateKeyArray[:])
	if err != nil || n != len(privateKeyArray) {
		panic("Unable to generate random bytes")
	}
	privateKeyArray[0] &= 248
	privateKeyArray[31] = (privateKeyArray[31] & 127) | 64

	curve25519.ScalarBaseMult(publicKeyArray, privateKeyArray)
}

func main() {}
