iOS: Migrate to Swift
This is in preparation for moving to SwiftUI at some point.
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25 changed files with 816 additions and 1266 deletions
203
iOS/ShowDetailsController.swift
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203
iOS/ShowDetailsController.swift
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/*
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* Copyright (c) 2016 - 2019 Jonathan Schleifer <js@heap.zone>
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*
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* https://heap.zone/git/scrypt-pwgen.git
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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import UIKit
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import ObjFW
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import ObjFW_Bridge
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class ShowDetailsController: UITableViewController, UITextFieldDelegate {
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@IBOutlet var nameField: UITextField?
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@IBOutlet var lengthField: UITextField?
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@IBOutlet var legacySwitch: UISwitch?
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@IBOutlet var keyFileField: UITextField?
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@IBOutlet var passphraseField: UITextField?
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public var mainViewController: MainViewController?
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private var name: OFString = "".ofObject
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private var length: size_t = 0
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private var isLegacy: Bool = false
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private var keyFile: OFString? = nil
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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guard let mainViewController = self.mainViewController else { return }
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guard let tableView = mainViewController.tableView else { return }
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let siteStorage = mainViewController.siteStorage
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guard let indexPath = tableView.indexPathForSelectedRow else { return }
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name = mainViewController.sites[indexPath.row]
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length = siteStorage.length(forSite: name)
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isLegacy = siteStorage.isLegacy(site: name)
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keyFile = siteStorage.keyFile(forSite: name)
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nameField?.text = name.nsObject
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lengthField?.text = "\(length)"
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legacySwitch?.isOn = isLegacy
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keyFileField?.text = keyFile?.nsObject
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tableView.deselectRow(at: indexPath, animated: true)
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}
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func textFieldShouldReturn(_ textField: UITextField) -> Bool {
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textField.resignFirstResponder()
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return false
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}
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static private func clearNSMutableString(_ string: NSMutableString) {
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/*
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* NSMutableString does not offer a way to zero the string.
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* This is in the hope that setting a single character at an index just
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* replaces that character in memory, and thus allows us to zero the
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* password.
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*/
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for i in 0..<string.length {
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string.replaceCharacters(in: NSRange(location: i, length: 1),
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with: " ")
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}
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}
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override func tableView(_ tableView: UITableView,
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didSelectRowAt indexPath: IndexPath) {
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passphraseField?.resignFirstResponder()
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tableView.deselectRow(at: indexPath, animated: true)
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if indexPath.section == 3 {
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switch indexPath.row {
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case 0:
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self.generateAndCopy()
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case 1:
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self.generateAndShow()
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default:
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break
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}
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}
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}
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private func generateAndCopy() {
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self.generateWithCallback { (password: NSMutableString) in
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let pasteboard = UIPasteboard.general
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pasteboard.string = password as String
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ShowDetailsController.clearNSMutableString(password)
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let message = "The password has been copied into the clipboard."
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let alert = UIAlertController(title: "Password Generated",
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message: message,
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preferredStyle: .alert)
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let action = UIAlertAction(title: "OK", style: .default) {
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(UIAlertAction) in
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self.navigationController?.popViewController(animated: true)
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}
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alert.addAction(action)
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self.present(alert, animated: true, completion: nil)
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}
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}
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private func generateAndShow() {
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self.generateWithCallback { (password: NSMutableString) in
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let alert = UIAlertController(title: "Generated Passphrase",
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message: password as String,
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preferredStyle: .alert)
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let action = UIAlertAction(title: "OK", style: .default) {
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(UIAlertAction) in
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self.navigationController?.popViewController(animated: true)
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}
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alert.addAction(action)
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self.present(alert, animated: true) {
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ShowDetailsController.clearNSMutableString(password)
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}
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}
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}
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private func generateWithCallback(_ block: (_: NSMutableString) -> ()) {
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let generator: PasswordGenerator = isLegacy ?
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LegacyPasswordGenerator() : NewPasswordGenerator()
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generator.site = name
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generator.length = length
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if let keyFile = keyFile {
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guard let documentDirectory = NSSearchPathForDirectoriesInDomains(
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.documentDirectory, .userDomainMask, true).first
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else {
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print("Could not get key files: No documents directory")
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return
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}
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let keyFilePath = documentDirectory.ofObject.appending(keyFile)
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generator.keyFile = OFMutableData(contentsOfFile: keyFilePath)
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}
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let passphraseText = (passphraseField?.text ?? "") as NSString
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let passphrase = of_strdup(passphraseText.utf8String!)!
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generator.passphrase = UnsafePointer<CChar>(passphrase)
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let mainStoryboard = UIStoryboard(name: "Main", bundle: nil)
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let activityController = mainStoryboard.instantiateViewController(
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withIdentifier: "activityIndicator")
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navigationController?.view.addSubview(activityController.view)
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DispatchQueue.global(qos: .default).async {
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OFException.try({
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generator.derivePassword()
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}, finally: {
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if let keyFile = generator.keyFile as? OFMutableData {
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of_explicit_memset(keyFile.mutableItems, 0, keyFile.count)
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}
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of_explicit_memset(passphrase, 0, strlen(passphrase))
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free(passphrase)
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})
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}
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let password = NSMutableString(bytes: generator.output,
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length: generator.length,
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encoding: String.Encoding.utf8.rawValue)!
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of_explicit_memset(generator.output, 0, generator.length)
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DispatchQueue.main.sync {
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activityController.view.isHidden = true
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block(password)
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}
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}
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@IBAction func remove(_ sender: Any?) {
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let message = "Do you want to remove this site?"
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let alert = UIAlertController(title: "Remove Site?",
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message: message,
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preferredStyle: .alert)
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alert.addAction(
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UIAlertAction(title: "No", style: .cancel, handler: nil))
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let yesAction = UIAlertAction(title: "Yes", style: .destructive) {
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(UIAlertAction) in
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self.mainViewController?.siteStorage.removeSite(self.name)
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self.mainViewController?.reset()
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self.navigationController?.popViewController(animated: true)
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}
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alert.addAction(yesAction)
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self.present(alert, animated: true, completion: nil)
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}
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}
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