[WIP] OpenVPN tunnel implementation
This commit is contained in:
Alex Kh
parent
4976dc3a4c
commit
eba71469a4
15 changed files with 845 additions and 230 deletions
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@ -5,7 +5,7 @@
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import Foundation
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import NetworkExtension
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let vpnName = "AmneziaVPN"
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let vpnName = "Amnezia WireguardVPN"
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var vpnBundleID = "";
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@objc class VPNIPAddressRange : NSObject {
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@ -30,27 +30,32 @@ public class IOSVpnProtocolImpl : NSObject {
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private var deviceIpv4Address: String? = nil
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private var deviceIpv6Address: String? = nil
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@objc enum IOSConnectionState: Int { case Error, Connected, Disconnected }
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@objc init(bundleID: String, privateKey: Data, deviceIpv4Address: String, deviceIpv6Address: String, closure: @escaping (IOSConnectionState, Date?) -> Void, callback: @escaping (Bool) -> Void) {
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@objc enum ConnectionState: Int { case Error, Connected, Disconnected }
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@objc init(bundleID: String,
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config: String,
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closure: @escaping (ConnectionState, Date?) -> Void,
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callback: @escaping (Bool) -> Void) {
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super.init()
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Logger.configureGlobal(tagged: "APP", withFilePath: "")
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print("Config from caller: \(config)")
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vpnBundleID = bundleID;
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precondition(!vpnBundleID.isEmpty)
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stateChangeCallback = callback
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self.privateKey = PrivateKey(rawValue: privateKey)
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self.deviceIpv4Address = deviceIpv4Address
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self.deviceIpv6Address = deviceIpv6Address
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NotificationCenter.default.addObserver(self, selector: #selector(self.vpnStatusDidChange(notification:)), name: Notification.Name.NEVPNStatusDidChange, object: nil)
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NotificationCenter.default.addObserver(self,
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selector: #selector(self.vpnStatusDidChange(notification:)),
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name: Notification.Name.NEVPNStatusDidChange,
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object: nil)
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NETunnelProviderManager.loadAllFromPreferences { [weak self] managers, error in
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if let error = error {
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Logger.global?.log(message: "Loading from preference failed: \(error)")
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closure(IOSConnectionState.Error, nil)
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closure(ConnectionState.Error, nil)
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return
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}
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@ -64,11 +69,22 @@ public class IOSVpnProtocolImpl : NSObject {
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print("We have received \(nsManagers.count) managers.")
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let tunnel = nsManagers.first(where: IOSVpnProtocolImpl.isOurManager(_:))
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if let name = tunnel?.localizedDescription, name == vpnName {
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tunnel?.removeFromPreferences(completionHandler: { removeError in
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if let error = removeError {
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Logger.global?.log(message: "WireguardVPN Tunnel Remove from Prefs Error: \(error)")
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closure(ConnectionState.Error, nil)
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return
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}
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})
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}
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if tunnel == nil {
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Logger.global?.log(message: "Creating the tunnel")
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print("Creating the tunnel")
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self!.tunnel = NETunnelProviderManager()
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closure(IOSConnectionState.Disconnected, nil)
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closure(ConnectionState.Disconnected, nil)
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return
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}
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@ -77,9 +93,78 @@ public class IOSVpnProtocolImpl : NSObject {
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self!.tunnel = tunnel
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if tunnel?.connection.status == .connected {
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closure(IOSConnectionState.Connected, tunnel?.connection.connectedDate)
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closure(ConnectionState.Connected, tunnel?.connection.connectedDate)
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} else {
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closure(IOSConnectionState.Disconnected, nil)
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closure(ConnectionState.Disconnected, nil)
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}
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}
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}
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@objc init(bundleID: String,
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privateKey: Data,
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deviceIpv4Address: String,
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deviceIpv6Address: String,
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closure: @escaping (ConnectionState, Date?) -> Void,
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callback: @escaping (Bool) -> Void) {
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super.init()
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Logger.configureGlobal(tagged: "APP", withFilePath: "")
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vpnBundleID = bundleID;
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precondition(!vpnBundleID.isEmpty)
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stateChangeCallback = callback
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self.privateKey = PrivateKey(rawValue: privateKey)
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self.deviceIpv4Address = deviceIpv4Address
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self.deviceIpv6Address = deviceIpv6Address
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NotificationCenter.default.addObserver(self, selector: #selector(self.vpnStatusDidChange(notification:)), name: Notification.Name.NEVPNStatusDidChange, object: nil)
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NETunnelProviderManager.loadAllFromPreferences { [weak self] managers, error in
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if let error = error {
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Logger.global?.log(message: "Loading from preference failed: \(error)")
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closure(ConnectionState.Error, nil)
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return
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}
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if self == nil {
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Logger.global?.log(message: "We are shutting down.")
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return
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}
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let nsManagers = managers ?? []
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Logger.global?.log(message: "We have received \(nsManagers.count) managers.")
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print("We have received \(nsManagers.count) managers.")
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let tunnel = nsManagers.first(where: IOSVpnProtocolImpl.isOurManager(_:))
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if let name = tunnel?.localizedDescription, name != vpnName {
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tunnel?.removeFromPreferences(completionHandler: { removeError in
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if let error = removeError {
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Logger.global?.log(message: "OpenVpn Tunnel Remove from Prefs Error: \(error)")
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closure(ConnectionState.Error, nil)
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return
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}
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})
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}
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if tunnel == nil {
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Logger.global?.log(message: "Creating the tunnel")
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print("Creating the tunnel")
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self!.tunnel = NETunnelProviderManager()
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closure(ConnectionState.Disconnected, nil)
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return
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}
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Logger.global?.log(message: "Tunnel already exists")
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print("Tunnel already exists")
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self!.tunnel = tunnel
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if tunnel?.connection.status == .connected {
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closure(ConnectionState.Connected, tunnel?.connection.connectedDate)
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} else {
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closure(ConnectionState.Disconnected, nil)
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}
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}
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}
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@ -142,6 +227,22 @@ public class IOSVpnProtocolImpl : NSObject {
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print("Found the manager with the correct bundle identifier: \(tunnelProto.providerBundleIdentifier!)")
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return true
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}
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@objc func connect(ovpnConfig: String, failureCallback: @escaping () -> Void) {
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Logger.global?.log(message: "Connecting")
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assert(tunnel != nil)
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let addr: String = ovpnConfig
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.splitToArray(separator: "\n", trimmingCharacters: nil)
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.first { $0.starts(with: "remote ") }
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.splitToArray(separator: " ", trimmingCharacters: nil)[1]
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print("server: \(addr)")
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// Let's remove the previous config if it exists.
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(tunnel?.protocolConfiguration as? NETunnelProviderProtocol)?.destroyConfigurationReference()
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self.configureOpenVPNTunnel(serverAddress: addr, config: ovpnConfig, failureCallback: failureCallback)
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}
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@objc func connect(dnsServer: String, serverIpv6Gateway: String, serverPublicKey: String, presharedKey: String, serverIpv4AddrIn: String, serverPort: Int, allowedIPAddressRanges: Array<VPNIPAddressRange>, ipv6Enabled: Bool, reason: Int, failureCallback: @escaping () -> Void) {
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Logger.global?.log(message: "Connecting")
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@ -247,6 +348,46 @@ public class IOSVpnProtocolImpl : NSObject {
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}
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}
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}
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func configureOpenVPNTunnel(serverAddress: String, config: String, failureCallback: @escaping () -> Void) {
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let tunnelProtocol = NETunnelProviderProtocol()
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tunnelProtocol.serverAddress = serverAddress
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tunnelProtocol.providerBundleIdentifier = vpnBundleID
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tunnelProtocol.providerConfiguration = ["ovpn": Data(config.utf8)]
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tunnel?.protocolConfiguration = tunnelProtocol
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tunnel?.localizedDescription = "Amnezia OpenVPN"
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tunnel?.isEnabled = true
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tunnel?.saveToPreferences { [unowned self] saveError in
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if let error = saveError {
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Logger.global?.log(message: "Connect OpenVPN Tunnel Save Error: \(error)")
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failureCallback()
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return
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}
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Logger.global?.log(message: "Saving the OpenVPN tunnel succeeded")
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self.tunnel?.loadFromPreferences { error in
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if let error = error {
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Logger.global?.log(message: "Connect OpenVPN Tunnel Load Error: \(error)")
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failureCallback()
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return
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}
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Logger.global?.log(message: "Loading the OpenVPN tunnel succeeded")
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print("Loading the openvpn tunnel succeeded")
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do {
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print("starting openvpn tunnel")
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try self.tunnel?.connection.startVPNTunnel()
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} catch let error {
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Logger.global?.log(message: "Something went wrong: \(error)")
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failureCallback()
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return
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}
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}
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}
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}
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@objc func disconnect() {
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Logger.global?.log(message: "Disconnecting")
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@ -257,7 +398,74 @@ public class IOSVpnProtocolImpl : NSObject {
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@objc func checkStatus(callback: @escaping (String, String, String) -> Void) {
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Logger.global?.log(message: "Check status")
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assert(tunnel != nil)
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let protoType = (tunnel!.localizedDescription ?? "").toTunnelType
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switch protoType {
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case .wireguard:
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checkWireguardStatus(callback: callback)
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case .openvpn:
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checkOVPNStatus(callback: callback)
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case .empty:
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break
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}
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}
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private func checkOVPNStatus(callback: @escaping (String, String, String) -> Void) {
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Logger.global?.log(message: "Check OpenVPN")
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guard let proto = tunnel?.protocolConfiguration as? NETunnelProviderProtocol else {
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callback("", "", "")
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return
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}
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guard let configData = proto.providerConfiguration?["ovpn"] as? Data,
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let ovpnConfig = String(data: configData, encoding: .utf8) else {
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callback("", "", "")
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return
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}
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let serverIpv4Gateway: String = ovpnConfig
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.splitToArray(separator: "\n", trimmingCharacters: nil)
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.first { $0.starts(with: "remote ") }
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.splitToArray(separator: " ", trimmingCharacters: nil)[1]
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print("server IP: \(serverIpv4Gateway)")
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let deviceIpv4Address = getTunIPAddress()
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print("device IP: \(serverIpv4Gateway)")
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if deviceIpv4Address == nil {
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callback("", "", "")
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return
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}
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guard let session = tunnel?.connection as? NETunnelProviderSession else {
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callback("", "", "")
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return
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}
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do {
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try session.sendProviderMessage(Data([UInt8(0)])) { [callback] data in
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guard let data = data,
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let configString = String(data: data, encoding: .utf8)
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else {
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Logger.global?.log(message: "Failed to convert data to string")
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callback("", "", "")
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return
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}
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callback("\(serverIpv4Gateway)", "\(deviceIpv4Address!)", configString)
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}
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} catch {
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Logger.global?.log(message: "Failed to retrieve data from session")
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callback("", "", "")
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}
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}
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private func checkWireguardStatus(callback: @escaping (String, String, String) -> Void) {
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Logger.global?.log(message: "Check Wireguard")
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let proto = tunnel!.protocolConfiguration as? NETunnelProviderProtocol
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if proto == nil {
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callback("", "", "")
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@ -305,4 +513,50 @@ public class IOSVpnProtocolImpl : NSObject {
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callback("", "", "")
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}
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}
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private func getTunIPAddress() -> String? {
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var address: String? = nil
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var interfaces: UnsafeMutablePointer<ifaddrs>? = nil
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var temp_addr: UnsafeMutablePointer<ifaddrs>? = nil
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var success: Int = 0
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// retrieve the current interfaces - returns 0 on success
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success = Int(getifaddrs(&interfaces))
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if success == 0 {
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// Loop through linked list of interfaces
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temp_addr = interfaces
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while temp_addr != nil {
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if temp_addr?.pointee.ifa_addr == nil {
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continue
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}
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if temp_addr?.pointee.ifa_addr.pointee.sa_family == UInt8(AF_INET) {
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// Check if interface is en0 which is the wifi connection on the iPhone
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if let name = temp_addr?.pointee.ifa_name, ((String(utf8String: name)?.contains("tun")) != nil) {
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// Get NSString from C String
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if let value = temp_addr?.pointee.ifa_addr as? sockaddr_in {
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address = String(utf8String: inet_ntoa(value.sin_addr))
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}
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}
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}
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temp_addr = temp_addr?.pointee.ifa_next
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}
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}
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freeifaddrs(interfaces)
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return address
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}
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}
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enum TunnelType: String {
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case wireguard, openvpn, empty
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}
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extension String {
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var toTunnelType: TunnelType {
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switch self {
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case "wireguard": return .wireguard
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case "openvpn": return .openvpn
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default:
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return .empty
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}
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}
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}
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