EtherGuard-VPN/tun/wintun/guid/guid_windows.go
Simon Rozman dcb8f1aa6b wintun: fix GUID leading zero padding
Signed-off-by: Simon Rozman <simon@rozman.si>
2019-05-09 12:16:21 +02:00

42 lines
927 B
Go

/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package guid
import (
"fmt"
"syscall"
"golang.org/x/sys/windows"
)
//sys clsidFromString(lpsz *uint16, pclsid *windows.GUID) (err error) [failretval!=0] = ole32.CLSIDFromString
//
// FromString parses "{XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}" string to GUID.
//
func FromString(str string) (*windows.GUID, error) {
strUTF16, err := syscall.UTF16PtrFromString(str)
if err != nil {
return nil, err
}
guid := &windows.GUID{}
err = clsidFromString(strUTF16, guid)
if err != nil {
return nil, err
}
return guid, nil
}
//
// ToString function converts GUID to string
// "{XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}".
//
// The resulting string is uppercase.
//
func ToString(guid *windows.GUID) string {
return fmt.Sprintf("{%08X-%04X-%04X-%04X-%012X}", guid.Data1, guid.Data2, guid.Data3, guid.Data4[:2], guid.Data4[2:])
}