Cyberghost support (#168)

* Host finder CLI for cyberghost
* Resolver program updated with Cyberghost data
* Gluetun cli clientkey subcommand

internal/settings/cyberghost.go

@@ -0,0 +1,54 @@
+package settings
+
+import (
+	"strings"
+
+	"github.com/qdm12/private-internet-access-docker/internal/models"
+	"github.com/qdm12/private-internet-access-docker/internal/params"
+)
+
+// Windscribe contains the settings to connect to a Windscribe server
+type Cyberghost struct {
+	User      string
+	Password  string
+	ClientKey string
+	Group     models.CyberghostGroup
+	Region    models.CyberghostRegion
+}
+
+func (c *Cyberghost) String() string {
+	settingsList := []string{
+		"Cyberghost settings:",
+		"User: [redacted]",
+		"Password: [redacted]",
+		"ClientKey: [redacted]",
+		"Group: " + string(c.Group),
+		"Region: " + string(c.Region),
+	}
+	return strings.Join(settingsList, "\n |--")
+}
+
+// GetCyberghostSettings obtains Cyberghost settings from environment variables using the params package.
+func GetCyberghostSettings(paramsReader params.Reader) (settings Cyberghost, err error) {
+	settings.User, err = paramsReader.GetUser()
+	if err != nil {
+		return settings, err
+	}
+	settings.Password, err = paramsReader.GetPassword()
+	if err != nil {
+		return settings, err
+	}
+	settings.ClientKey, err = paramsReader.GetCyberghostClientKey()
+	if err != nil {
+		return settings, err
+	}
+	settings.Group, err = paramsReader.GetCyberghostGroup()
+	if err != nil {
+		return settings, err
+	}
+	settings.Region, err = paramsReader.GetCyberghostRegion()
+	if err != nil {
+		return settings, err
+	}
+	return settings, nil
+}

internal/settings/settings.go

@@ -17,6 +17,7 @@ type Settings struct {
 	Mullvad     Mullvad
 	Windscribe  Windscribe
 	Surfshark   Surfshark
+	Cyberghost  Cyberghost
 	System      System
 	DNS         DNS
 	Firewall    Firewall
@@ -35,6 +36,8 @@ func (s *Settings) String() string {
 		vpnServiceProviderSettings = s.Windscribe.String()
 	case constants.Surfshark:
 		vpnServiceProviderSettings = s.Surfshark.String()
+	case constants.Cyberghost:
+		vpnServiceProviderSettings = s.Cyberghost.String()
 	}
 	return strings.Join([]string{
 		"Settings summary below:",
@@ -69,6 +72,8 @@ func GetAllSettings(paramsReader params.Reader) (settings Settings, err error) {
 		settings.Windscribe, err = GetWindscribeSettings(paramsReader, settings.OpenVPN.NetworkProtocol)
 	case constants.Surfshark:
 		settings.Surfshark, err = GetSurfsharkSettings(paramsReader)
+	case constants.Cyberghost:
+		settings.Cyberghost, err = GetCyberghostSettings(paramsReader)
 	default:
 		err = fmt.Errorf("VPN service provider %q is not valid", settings.VPNSP)
 	}