netbirdio/netbird · error

invalid key length: expected 32 bytes, got %d

Error message

invalid key length: expected 32 bytes, got %d

What it means

Error "invalid key length: expected 32 bytes, got %d" thrown in netbirdio/netbird.

Source

Thrown at client/iface/configurer/usp.go:519

}

func getFwmark() int {
	if nbnet.AdvancedRouting() && runtime.GOOS == "linux" {
		return nbnet.ControlPlaneMark
	}
	return 0
}

func hexToWireguardKey(hexKey string) (wgtypes.Key, error) {
	// Decode hex string to bytes
	keyBytes, err := hex.DecodeString(hexKey)
	if err != nil {
		return wgtypes.Key{}, fmt.Errorf("failed to decode hex key: %w", err)
	}

	// Check if we have the right number of bytes (WireGuard keys are 32 bytes)
	if len(keyBytes) != 32 {
		return wgtypes.Key{}, fmt.Errorf("invalid key length: expected 32 bytes, got %d", len(keyBytes))
	}

	// Convert to wgtypes.Key
	var key wgtypes.Key
	copy(key[:], keyBytes)

	return key, nil
}

func parseStatus(deviceName, ipcStr string) (*Stats, error) {
	stats := &Stats{DeviceName: deviceName}
	var currentPeer *Peer
	for _, line := range strings.Split(strings.TrimSpace(ipcStr), "\n") {
		if line == "" {
			continue
		}
		parts := strings.SplitN(line, "=", 2)
		if len(parts) != 2 {

View on GitHub (pinned to 93e97f4bf1)

When it happens

Trigger: Thrown at client/iface/configurer/usp.go:519 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of netbirdio/netbird@93e97f4bf1 (2026-08-16). Data as JSON: /api/errors/fc1fb1890fb7b9a4. Report an issue: GitHub.