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ChangePasscodeViewController.swift
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ChangePasscodeViewController.swift
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
import Foundation
import SwiftKeychainWrapper
import Shared
/// Displayed to the user when changing an existing passcode.
class ChangePasscodeViewController: PagingPasscodeViewController, PasscodeInputViewDelegate {
fileprivate var newPasscode: String?
fileprivate var oldPasscode: String?
override init() {
super.init()
self.title = AuthenticationStrings.changePasscode
self.panes = [
PasscodePane(title: AuthenticationStrings.enterPasscode, passcodeSize: authenticationInfo?.passcode?.count ?? 6),
PasscodePane(title: AuthenticationStrings.enterNewPasscode, passcodeSize: 6),
PasscodePane(title: AuthenticationStrings.reenterPasscode, passcodeSize: 6),
]
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
panes.forEach { $0.codeInputView.delegate = self }
// Don't show the keyboard or allow typing if we're locked out. Also display the error.
if authenticationInfo?.isLocked() ?? false {
displayLockoutError()
panes.first?.codeInputView.isUserInteractionEnabled = false
} else {
panes.first?.codeInputView.becomeFirstResponder()
}
}
func passcodeInputView(_ inputView: PasscodeInputView, didFinishEnteringCode code: String) {
switch currentPaneIndex {
case 0:
// Constraint: We need to make sure that the first passcode they've entered matches the one stored in the keychain
if code != authenticationInfo?.passcode {
panes[currentPaneIndex].shakePasscode()
failIncorrectPasscode(inputView)
return
}
oldPasscode = code
authenticationInfo?.recordValidation()
// Clear out any previous errors if we are allowed to proceed
errorToast?.removeFromSuperview()
scrollToNextAndSelect()
case 1:
// Constraint: The new passcode cannot match their old passcode.
if oldPasscode == code {
failMustBeDifferent()
// Scroll back and reset the input fields
resetAllInputFields()
return
}
newPasscode = code
errorToast?.removeFromSuperview()
scrollToNextAndSelect()
case 2:
if newPasscode != code {
failMismatchPasscode()
// Scroll back and reset input fields
resetAllInputFields()
scrollToPreviousAndSelect()
newPasscode = nil
return
}
changePasscodeToCode(code)
dismissAnimated()
default:
break
}
}
fileprivate func changePasscodeToCode(_ code: String) {
authenticationInfo?.updatePasscode(code)
KeychainWrapper.sharedAppContainerKeychain.setAuthenticationInfo(authenticationInfo)
let notificationCenter = NotificationCenter.default
notificationCenter.post(name: .PasscodeDidChange, object: nil)
}
}