//
// OpenVPNView.swift
// Passepartout
//
// Created by Davide De Rosa on 2/17/24.
// Copyright (c) 2024 Davide De Rosa. All rights reserved.
//
// https://github.com/passepartoutvpn
//
// This file is part of Passepartout.
//
// Passepartout is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Passepartout is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Passepartout. If not, see .
//
import CPassepartoutOpenVPNOpenSSL
import PassepartoutKit
import SwiftUI
import UtilsLibrary
struct OpenVPNView: View, ModuleDraftEditing {
@Environment(\.navigationPath)
private var path
@ObservedObject
var editor: ProfileEditor
let module: OpenVPNModule.Builder
private let isServerPushed: Bool
@State
private var isImporting = false
@State
private var importURL: URL?
@State
private var importPassphrase: String?
@State
private var requiresPassphrase = false
@State
private var paywallReason: PaywallReason?
@StateObject
private var errorHandler: ErrorHandler = .default()
init(serverConfiguration: OpenVPN.Configuration) {
let module = OpenVPNModule.Builder(configurationBuilder: serverConfiguration.builder())
let editor = ProfileEditor(modules: [module])
assert(module.configurationBuilder != nil, "isServerPushed must imply module.configurationBuilder != nil")
self.editor = editor
self.module = module
isServerPushed = true
}
init(editor: ProfileEditor, module: OpenVPNModule.Builder) {
self.editor = editor
self.module = module
isServerPushed = false
}
var body: some View {
contentView
.moduleView(editor: editor, draft: draft.wrappedValue, withName: !isServerPushed)
.fileImporter(
isPresented: $isImporting,
allowedContentTypes: [.item],
onCompletion: importConfiguration
)
.modifier(PaywallModifier(reason: $paywallReason))
.withErrorHandler(errorHandler)
.navigationDestination(for: Subroute.self, destination: destination)
}
}
// MARK: - Content
private extension OpenVPNView {
@ViewBuilder
var contentView: some View {
if let configuration = draft.wrappedValue.configurationBuilder {
ConfigurationView(
isServerPushed: isServerPushed,
configuration: configuration,
credentialsRoute: Subroute.credentials
)
} else {
importView
.modifier(providerModifier)
}
}
@ViewBuilder
var importView: some View {
if providerId.wrappedValue == nil {
Button(Strings.Modules.General.Rows.importFromFile) {
isImporting = true
}
.alert(
module.typeDescription,
isPresented: $requiresPassphrase,
presenting: importURL,
actions: { url in
SecureField(
Strings.Placeholders.secret,
text: $importPassphrase ?? ""
)
Button(Strings.Alerts.Import.Passphrase.ok) {
importConfiguration(from: .success(url))
}
Button(Strings.Global.cancel, role: .cancel) {
isImporting = false
}
},
message: {
Text(Strings.Alerts.Import.Passphrase.message($0.lastPathComponent))
}
)
}
}
var providerModifier: some ViewModifier {
VPNProviderContentModifier(
providerId: providerId,
selectedEntity: providerEntity,
paywallReason: $paywallReason,
entityDestination: Subroute.providerServer,
providerRows: {
moduleGroup(for: providerAccountRows)
}
)
}
var providerId: Binding {
editor.binding(forProviderOf: module.id)
}
var providerEntity: Binding?> {
editor.binding(forProviderEntityOf: module.id)
}
var providerAccountRows: [ModuleRow]? {
[.push(caption: Strings.Modules.Openvpn.credentials, route: HashableRoute(Subroute.credentials))]
}
}
private extension OpenVPNView {
func onSelectServer(server: VPNServer, preset: VPNPreset) {
providerEntity.wrappedValue = VPNEntity(server: server, preset: preset)
path.wrappedValue.removeLast()
}
func importConfiguration(from result: Result) {
do {
let url = try result.get()
guard url.startAccessingSecurityScopedResource() else {
throw AppError.permissionDenied
}
defer {
url.stopAccessingSecurityScopedResource()
}
importURL = url
let parsed = try StandardOpenVPNParser(decrypter: OSSLTLSBox())
.parsed(fromURL: url, passphrase: importPassphrase)
draft.wrappedValue.configurationBuilder = parsed.configuration.builder()
} catch StandardOpenVPNParserError.encryptionPassphrase,
StandardOpenVPNParserError.unableToDecrypt {
Task {
// XXX: re-present same alert after artificial delay
try? await Task.sleep(for: .milliseconds(500))
importPassphrase = nil
requiresPassphrase = true
}
} catch {
pp_log(.app, .error, "Unable to import OpenVPN configuration: \(error)")
errorHandler.handle(
(error as? StandardOpenVPNParserError)?.asPassepartoutError ?? error,
title: module.typeDescription
)
}
}
}
// MARK: - Destinations
private extension OpenVPNView {
enum Subroute: Hashable {
case providerServer
case credentials
}
@ViewBuilder
func destination(for route: Subroute) -> some View {
switch route {
case .providerServer:
providerId.wrappedValue.map {
VPNProviderServerView(
moduleId: module.id,
providerId: $0,
configurationType: OpenVPN.Configuration.self,
selectedEntity: providerEntity.wrappedValue,
filtersWithSelection: true,
selectTitle: Strings.Providers.selectEntity,
onSelect: onSelectServer
)
}
case .credentials:
CredentialsView(
isInteractive: draft.isInteractive,
credentials: draft.credentials
)
}
}
}
// MARK: - Previews
// swiftlint: disable force_try
#Preview {
var builder = OpenVPN.Configuration.Builder(withFallbacks: true)
builder.noPullMask = [.proxy]
builder.authUserPass = true
builder.remotes = [
.init(rawValue: "2.2.2.2:UDP:2222")!,
.init(rawValue: "6.6.6.6:UDP:6666")!,
.init(rawValue: "12.12.12.12:TCP:21212")!,
.init(rawValue: "12:12:12:12:20:20:20:20:TCP6:21212")!
]
builder.ipv4 = IPSettings(subnet: try! .init("5.5.5.5", 24))
.including(routes: [
.init(defaultWithGateway: .ip("120.1.1.1", .v4)),
.init(.init(rawValue: "55.10.20.30/32"), nil)
])
.excluding(routes: [
.init(.init(rawValue: "88.40.30.30/32"), nil),
.init(.init(rawValue: "60.60.60.60/32"), .ip("127.0.0.1", .v4))
])
builder.ipv6 = IPSettings(subnet: try! .init("::5", 24))
.including(routes: [
.init(defaultWithGateway: .ip("120::1:1:1", .v6)),
.init(.init(rawValue: "55:10:20::30/128"), nil),
.init(.init(rawValue: "60:60:60::60/128"), .ip("::2", .v6))
])
.excluding(routes: [
.init(.init(rawValue: "88:40:30::30/32"), nil)
])
builder.routingPolicies = [.IPv4, .IPv6]
builder.dnsServers = ["1.2.3.4", "4.5.6.7"]
builder.dnsDomain = "domain.com"
builder.searchDomains = ["search1.com", "search2.com"]
builder.httpProxy = try! .init("10.10.10.10", 1080)
builder.httpsProxy = try! .init("10.10.10.10", 8080)
builder.proxyAutoConfigurationURL = URL(string: "https://hello.pac")!
builder.proxyBypassDomains = ["bypass1.com", "bypass2.com"]
builder.xorMethod = .xormask(mask: .init(Data(hex: "1234")))
builder.ca = .init(mockPem: "ca-certificate")
builder.clientCertificate = .init(mockPem: "client-certificate")
builder.clientKey = .init(mockPem: "client-key")
builder.tlsWrap = .init(strategy: .auth, key: .init(biData: Data(count: 256)))
builder.keepAliveInterval = 10.0
builder.renegotiatesAfter = 60.0
builder.randomizeEndpoint = true
builder.randomizeHostnames = true
let module = OpenVPNModule.Builder(configurationBuilder: builder)
return module.preview(title: "OpenVPN")
}
// swiftlint: enable force_try
private extension OpenVPN.CryptoContainer {
init(mockPem: String) {
self.init(pem: """
-----BEGIN CERTIFICATE-----
\(mockPem)
-----END CERTIFICATE-----
""")
}
}