Initial QSfera import

Server/vendor/github.com/rs/xid/hostid_windows.go

@@ -0,0 +1,50 @@
+// +build windows
+
+package xid
+
+import (
+	"fmt"
+	"syscall"
+	"unsafe"
+)
+
+func readPlatformMachineID() (string, error) {
+	// source: https://github.com/shirou/gopsutil/blob/master/host/host_syscall.go
+	var h syscall.Handle
+
+	regKeyCryptoPtr, err := syscall.UTF16PtrFromString(`SOFTWARE\Microsoft\Cryptography`)
+	if err != nil {
+		return "", fmt.Errorf(`error reading registry key "SOFTWARE\Microsoft\Cryptography": %w`, err)
+	}
+
+	err = syscall.RegOpenKeyEx(syscall.HKEY_LOCAL_MACHINE, regKeyCryptoPtr, 0, syscall.KEY_READ|syscall.KEY_WOW64_64KEY, &h)
+	if err != nil {
+		return "", err
+	}
+	defer func() { _ = syscall.RegCloseKey(h) }()
+
+	const syscallRegBufLen = 74 // len(`{`) + len(`abcdefgh-1234-456789012-123345456671` * 2) + len(`}`) // 2 == bytes/UTF16
+	const uuidLen = 36
+
+	var regBuf [syscallRegBufLen]uint16
+	bufLen := uint32(syscallRegBufLen)
+	var valType uint32
+
+	mGuidPtr, err := syscall.UTF16PtrFromString(`MachineGuid`)
+	if err != nil {
+		return "", fmt.Errorf("error reading machine GUID: %w", err)
+	}
+
+	err = syscall.RegQueryValueEx(h, mGuidPtr, nil, &valType, (*byte)(unsafe.Pointer(&regBuf[0])), &bufLen)
+	if err != nil {
+		return "", fmt.Errorf("error parsing ")
+	}
+
+	hostID := syscall.UTF16ToString(regBuf[:])
+	hostIDLen := len(hostID)
+	if hostIDLen != uuidLen {
+		return "", fmt.Errorf("HostID incorrect: %q\n", hostID)
+	}
+
+	return hostID, nil
+}