99 lines
3.2 KiB
Swift
99 lines
3.2 KiB
Swift
//
|
|
// Copyright (c) 2018 Touch Instinct
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the Software), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
//
|
|
|
|
import KeychainAccess
|
|
import CryptoSwift
|
|
|
|
private enum Keys {
|
|
static let passCodeHash = "passCodeHashKey"
|
|
static let isBiometricsEnabled = "isBiometricsEnabledKey"
|
|
static let isInitialLoad = "isInitialLoadKey"
|
|
}
|
|
|
|
private enum Values {
|
|
static let biometricsEnabled = "biometricsEnabled"
|
|
static let initialLoad = "initialLoad"
|
|
}
|
|
|
|
/// Represents base pass code service which encapsulates pass code storing
|
|
open class BasePassCodeService {
|
|
|
|
/// Override to set specific keychain service name
|
|
open class var keychainServiceString: String {
|
|
return Bundle.main.bundleIdentifier ?? ""
|
|
}
|
|
|
|
public init() {
|
|
let initialLoadValue = UserDefaults.standard.value(forKey: Keys.isInitialLoad)
|
|
if initialLoadValue == nil {
|
|
UserDefaults.standard.set(Values.initialLoad, forKey: Keys.isInitialLoad)
|
|
reset()
|
|
}
|
|
}
|
|
|
|
// MARK: - Private stuff
|
|
|
|
private lazy var keychain = Keychain(service: BasePassCodeService.keychainServiceString).synchronizable(false)
|
|
|
|
private var passCodeHash: String? {
|
|
return keychain[Keys.passCodeHash]
|
|
}
|
|
}
|
|
|
|
public extension BasePassCodeService {
|
|
|
|
/// Indicates is pass code already saved on this device
|
|
var isPassCodeSaved: Bool {
|
|
return keychain[Keys.passCodeHash] != nil
|
|
}
|
|
|
|
/// Possibility to authenticate via biometrics. TouchID or FaceID
|
|
var isBiometricsAuthorizationEnabled: Bool {
|
|
get {
|
|
return keychain[Keys.isBiometricsEnabled] == Values.biometricsEnabled
|
|
}
|
|
set {
|
|
keychain[Keys.isBiometricsEnabled] = newValue ? Values.biometricsEnabled : nil
|
|
}
|
|
}
|
|
|
|
/// Saves new pass code
|
|
func save(passCode: String?) {
|
|
if let passCode = passCode {
|
|
keychain[Keys.passCodeHash] = passCode.sha256()
|
|
} else {
|
|
keychain[Keys.passCodeHash] = nil
|
|
}
|
|
}
|
|
|
|
/// Check if pass code is correct
|
|
func check(passCode: String) -> Bool {
|
|
return passCode.sha256() == passCodeHash
|
|
}
|
|
|
|
/// Reset pass code settings
|
|
func reset() {
|
|
save(passCode: nil)
|
|
isBiometricsAuthorizationEnabled = false
|
|
}
|
|
}
|