Separate parser and helpers from Password class for better testability
This commit is contained in:
Danny Moesch
Bob Sun
parent
2abbceb2e9
commit
7c12263458
17 changed files with 913 additions and 537 deletions
30
passKit/Helpers/PasswordHelpers.swift
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30
passKit/Helpers/PasswordHelpers.swift
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@ -0,0 +1,30 @@
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//
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// PasswordHelpers.swift
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// passKit
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//
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// Created by Danny Moesch on 17.08.18.
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// Copyright © 2018 Bob Sun. All rights reserved.
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//
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import OneTimePassword
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public enum OtpType {
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case totp, hotp, none
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init(token: Token?) {
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switch token?.generator.factor {
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case .some(.counter):
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self = .hotp
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case .some(.timer):
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self = .totp
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default:
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self = .none
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}
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}
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}
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enum PasswordChange: Int {
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case path = 0x01
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case content = 0x02
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case none = 0x00
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}
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@ -16,3 +16,9 @@ public extension String {
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return addingPercentEncoding(withAllowedCharacters: allowed)
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}
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}
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extension String {
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static func | (left: String, right: String) -> String {
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return right.isEmpty ? left : left + "\n" + right
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}
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}
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@ -6,163 +6,99 @@
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// Copyright © 2017 Bob Sun. All rights reserved.
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//
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import Foundation
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import SwiftyUserDefaults
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import OneTimePassword
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import Base32
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import KeychainAccess
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public struct AdditionField: Equatable {
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public var title: String = ""
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public var content: String = ""
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var asString: String { return title.isEmpty ? content : title + ": " + content }
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var asTuple: (String, String) { return (title, content) }
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public static func == (first: AdditionField, second: AdditionField) -> Bool {
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return first.asTuple == second.asTuple
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}
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}
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public enum OtpType {
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case totp, hotp, none
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static func from(token: Token?) -> OtpType {
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switch token?.generator.factor {
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case .some(.counter):
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return .hotp
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case .some(.timer):
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return .totp
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default:
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return .none
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}
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}
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}
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enum PasswordChange: Int {
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case path = 0x01
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case content = 0x02
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case none = 0x00
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}
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public class Password {
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public static let OTP_KEYWORDS = ["otp_secret", "otp_type", "otp_algorithm", "otp_period", "otp_digits", "otp_counter", "otpauth"]
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public static let BLANK = " "
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public static let MULTILINE_WITH_LINE_BREAK_INDICATOR = "|"
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public static let MULTILINE_WITH_LINE_BREAK_SEPARATOR = "\n"
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public static let MULTILINE_WITHOUT_LINE_BREAK_INDICATOR = ">"
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public static let MULTILINE_WITHOUT_LINE_BREAK_SEPARATOR = BLANK
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private static let OTPAUTH = "otpauth"
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private static let OTPAUTH_URL_START = "\(OTPAUTH)://"
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private static let PASSWORD_KEYWORD = "password"
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private static let USERNAME_KEYWORD = "username"
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private static let LOGIN_KEYWORD = "login"
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private static let URL_KEYWORD = "url"
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private static let UNKNOWN = "unknown"
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public var name: String
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public var url: URL
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public var namePath: String { return url.deletingPathExtension().path }
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public var plainText: String
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public var password = ""
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public var changed: Int = 0
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public var plainText = ""
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public var plainData: Data { return plainText.data(using: .utf8)! }
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public var username: String? { return getAdditionValue(withKey: Password.USERNAME_KEYWORD, caseSensitive: false) }
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public var login: String? { return getAdditionValue(withKey: Password.LOGIN_KEYWORD, caseSensitive: false) }
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public var urlString: String? { return getAdditionValue(withKey: Password.URL_KEYWORD, caseSensitive: false) }
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public var otpType: OtpType = .none
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private var parser = Parser(plainText: "")
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private var additions = [AdditionField]()
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private var firstLineIsOTPField = false
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private var otpToken: Token?
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public var otpType: OtpType { return OtpType.from(token: self.otpToken) }
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private var otpToken: Token? {
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didSet {
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otpType = OtpType(token: otpToken)
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}
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}
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public var namePath: String {
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return url.deletingPathExtension().path
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}
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public var password: String {
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return parser.firstLine
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}
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public var plainData: Data {
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return plainText.data(using: .utf8)!
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}
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public var additionsPlainText: String {
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return parser.additionsSection
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}
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public var username: String? {
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return getAdditionValue(withKey: Constants.USERNAME_KEYWORD)
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}
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public var login: String? {
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return getAdditionValue(withKey: Constants.LOGIN_KEYWORD)
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}
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public var urlString: String? {
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return getAdditionValue(withKey: Constants.URL_KEYWORD)
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}
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public init(name: String, url: URL, plainText: String) {
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self.name = name
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self.url = url
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self.initEverything(name: name, url: url, plainText: plainText)
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}
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public func updatePassword(name: String, url: URL, plainText: String) {
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if self.plainText != plainText || self.url != url {
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if self.plainText != plainText {
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changed = changed|PasswordChange.content.rawValue
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}
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if self.url != url {
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changed = changed|PasswordChange.path.rawValue
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}
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self.initEverything(name: name, url: url, plainText: plainText)
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}
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}
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private func initEverything(name: String, url: URL, plainText: String) {
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self.name = name
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self.url = url
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self.plainText = plainText
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additions.removeAll()
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// split the plain text
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let plainTextSplit = self.plainText
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.split(omittingEmptySubsequences: false) { $0 == "\n" || $0 == "\r\n" }
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.map(String.init)
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initEverything()
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}
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// get password
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password = plainTextSplit.first ?? ""
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public func updatePassword(name: String, url: URL, plainText: String) {
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guard self.plainText != plainText || self.url != url else {
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return
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}
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// get remaining lines (filter out empty lines)
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let additionalLines = plainTextSplit[1...].filter { !$0.isEmpty }
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if self.plainText != plainText {
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self.plainText = plainText
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changed = changed|PasswordChange.content.rawValue
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}
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if self.url != url {
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self.url = url
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changed = changed|PasswordChange.path.rawValue
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}
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// parse lines to get key-value pairs
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parseDataFrom(lines: additionalLines)
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self.name = name
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initEverything()
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}
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// check whether the first line looks like an otp entry
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private func initEverything() {
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parser = Parser(plainText: self.plainText)
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additions = parser.additionFields
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// Check whether the first line looks like an otp entry.
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checkPasswordForOtpToken()
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// construct the otp token
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// Construct the otp token.
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updateOtpToken()
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}
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private func parseDataFrom(lines: [String]) {
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var unknownIndex = 0
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var i = lines.startIndex
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while i < lines.count {
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let line = lines[i]
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i += 1
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var (key, value) = Password.getKeyValuePair(from: line)
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if key == nil {
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unknownIndex += 1
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key = "\(Password.UNKNOWN) \(unknownIndex)"
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} else if value == Password.MULTILINE_WITH_LINE_BREAK_INDICATOR {
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value = gatherMultilineValue(from: lines, startingAt: &i, removingLineBreaks: false)
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} else if value == Password.MULTILINE_WITHOUT_LINE_BREAK_INDICATOR {
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value = gatherMultilineValue(from: lines, startingAt: &i, removingLineBreaks: true)
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}
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additions.append(AdditionField(title: key!, content: value))
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}
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}
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private func gatherMultilineValue(from content: [String], startingAt i: inout Int, removingLineBreaks: Bool) -> String {
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var result = ""
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guard i < content.count else { return result }
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let numberInitialBlanks = content[i].enumerated().first(where: { $1 != Character(Password.BLANK) })?.0 ?? content[i].count
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guard numberInitialBlanks != 0 else { return result }
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let initialBlanks = String(repeating: Password.BLANK, count: numberInitialBlanks)
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while i < content.count && content[i].starts(with: initialBlanks) {
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result.append(String(content[i].dropFirst(numberInitialBlanks)))
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result.append(removingLineBreaks ? Password.MULTILINE_WITHOUT_LINE_BREAK_SEPARATOR : Password.MULTILINE_WITH_LINE_BREAK_SEPARATOR)
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i += 1
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}
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return result.trimmingCharacters(in: .whitespacesAndNewlines)
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}
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private func checkPasswordForOtpToken() {
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let (key, value) = Password.getKeyValuePair(from: self.password)
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if Password.OTP_KEYWORDS.contains(key ?? "") {
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let (key, value) = Parser.getKeyValuePair(from: password)
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if Constants.OTP_KEYWORDS.contains(key ?? "") {
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firstLineIsOTPField = true
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self.additions.append(AdditionField(title: key!, content: value))
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additions.append(key! => value)
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} else {
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firstLineIsOTPField = false
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}
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@ -170,48 +106,17 @@ public class Password {
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public func getFilteredAdditions() -> [AdditionField] {
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return additions.filter { field in
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field.title.lowercased() != Password.USERNAME_KEYWORD
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&& field.title.lowercased() != Password.LOGIN_KEYWORD
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&& field.title.lowercased() != Password.PASSWORD_KEYWORD
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&& (!field.title.hasPrefix(Password.UNKNOWN) || !SharedDefaults[.isHideUnknownOn])
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&& (!Password.OTP_KEYWORDS.contains(field.title) || !SharedDefaults[.isHideOTPOn])
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field.title.lowercased() != Constants.USERNAME_KEYWORD
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&& field.title.lowercased() != Constants.LOGIN_KEYWORD
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&& field.title.lowercased() != Constants.PASSWORD_KEYWORD
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&& (!field.title.hasPrefix(Constants.UNKNOWN) || !SharedDefaults[.isHideUnknownOn])
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&& (!Constants.OTP_KEYWORDS.contains(field.title) || !SharedDefaults[.isHideOTPOn])
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}
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}
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// return a key-value pair from the line
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// key might be nil, if there is no ":" in the line
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private static func getKeyValuePair(from line: String) -> (key: String?, value: String) {
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let items = line.components(separatedBy: ": ").map{String($0).trimmingCharacters(in: .whitespaces)}
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var key : String? = nil
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var value = ""
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if items.count == 1 || (items[0].isEmpty && items[1].isEmpty) {
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// no ": " found, or empty on both sides of ": "
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value = line
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// otpauth special case
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if value.hasPrefix(Password.OTPAUTH_URL_START) {
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key = Password.OTPAUTH
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}
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} else {
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if !items[0].isEmpty {
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key = items[0]
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}
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value = items[1]
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}
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return (key, value)
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}
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public func getAdditionsPlainText() -> String {
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// lines starting from the second
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let plainTextSplit = plainText.split(maxSplits: 1, omittingEmptySubsequences: false) {
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$0 == "\n" || $0 == "\r\n"
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}.map(String.init)
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return plainTextSplit.count == 1 ? "" : plainTextSplit[1]
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}
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private func getAdditionValue(withKey key: String, caseSensitive: Bool = true) -> String? {
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let searchKey = caseSensitive ? key : key.lowercased()
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let matchingField = additions.first { (caseSensitive ? $0.title : $0.title.lowercased()) == searchKey }
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return matchingField?.content
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private func getAdditionValue(withKey key: String, caseSensitive: Bool = false) -> String? {
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let toLowercase = { (string: String) -> String in return caseSensitive ? string : string.lowercased() }
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return additions.first(where: { toLowercase($0.title) == toLowercase(key) })?.content
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}
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/*
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@ -239,9 +144,9 @@ public class Password {
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self.otpToken = nil
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// get otpauth, if we are able to generate a token, return
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if var otpauthString = getAdditionValue(withKey: Password.OTPAUTH) {
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if !otpauthString.hasPrefix("\(Password.OTPAUTH):") {
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otpauthString = "\(Password.OTPAUTH):\(otpauthString)"
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if var otpauthString = getAdditionValue(withKey: Constants.OTPAUTH, caseSensitive: true) {
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if !otpauthString.hasPrefix("\(Constants.OTPAUTH):") {
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otpauthString = "\(Constants.OTPAUTH):\(otpauthString)"
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}
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if let otpauthUrl = URL(string: otpauthString),
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let token = Token(url: otpauthUrl) {
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@ -358,10 +263,10 @@ public class Password {
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var lines : [String] = []
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self.plainText.enumerateLines() { line, _ in
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let (key, _) = Password.getKeyValuePair(from: line)
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if !Password.OTP_KEYWORDS.contains(key ?? "") {
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let (key, _) = Parser.getKeyValuePair(from: line)
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if !Constants.OTP_KEYWORDS.contains(key ?? "") {
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lines.append(line)
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} else if key == Password.OTPAUTH && newOtpauth != nil {
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} else if key == Constants.OTPAUTH && newOtpauth != nil {
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lines.append(newOtpauth!)
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// set to nil to prevent duplication
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newOtpauth = nil
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@ -376,11 +281,6 @@ public class Password {
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return self.otpToken?.currentPassword
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}
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public static func LooksLikeOTP(line: String) -> Bool {
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let (key, _) = getKeyValuePair(from: line)
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return Password.OTP_KEYWORDS.contains(key ?? "")
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}
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public static func generatePassword(length: Int) -> String{
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switch SharedDefaults[.passwordGeneratorFlavor] {
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case "Random":
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47
passKit/Parser/AdditionField.swift
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47
passKit/Parser/AdditionField.swift
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@ -0,0 +1,47 @@
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//
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// AdditionField.swift
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// passKit
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//
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// Created by Danny Moesch on 30.09.18.
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// Copyright © 2018 Bob Sun. All rights reserved.
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//
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public struct AdditionField: Hashable {
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public let title: String, content: String
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var asString: String {
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return title.isEmpty ? content : title + ": " + content
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}
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var asTuple: (String, String) {
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return (title, content)
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}
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}
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extension AdditionField {
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static func | (left: String, right: AdditionField) -> String {
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return left | right.asString
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}
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static func | (left: AdditionField, right: String) -> String {
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return left.asString | right
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}
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static func | (left: AdditionField, right: AdditionField) -> String {
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return left.asString | right
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}
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}
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extension AdditionField: Equatable {
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public static func == (first: AdditionField, second: AdditionField) -> Bool {
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return first.asTuple == second.asTuple
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}
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}
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infix operator =>: MultiplicationPrecedence
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func => (key: String, value: String) -> AdditionField {
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return AdditionField(title: key, content: value)
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}
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47
passKit/Parser/Constants.swift
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47
passKit/Parser/Constants.swift
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@ -0,0 +1,47 @@
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//
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// Constants.swift
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// passKit
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//
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// Created by Danny Moesch on 16.08.18.
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// Copyright © 2018 Bob Sun. All rights reserved.
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//
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public struct Constants {
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public static let OTP_KEYWORDS = [
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"otp_secret",
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"otp_type",
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"otp_algorithm",
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"otp_period",
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"otp_digits",
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"otp_counter",
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"otpauth",
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]
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static let BLANK = " "
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static let MULTILINE_WITH_LINE_BREAK_INDICATOR = "|"
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static let MULTILINE_WITH_LINE_BREAK_SEPARATOR = "\n"
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static let MULTILINE_WITHOUT_LINE_BREAK_INDICATOR = ">"
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static let MULTILINE_WITHOUT_LINE_BREAK_SEPARATOR = BLANK
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static let OTPAUTH = "otpauth"
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static let OTPAUTH_URL_START = "\(OTPAUTH)://"
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static let PASSWORD_KEYWORD = "password"
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static let USERNAME_KEYWORD = "username"
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static let LOGIN_KEYWORD = "login"
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static let URL_KEYWORD = "url"
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static let UNKNOWN = "unknown"
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public static func isOtpRelated(line: String) -> Bool {
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let (key, _) = Parser.getKeyValuePair(from: line)
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return OTP_KEYWORDS.contains(key ?? "")
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}
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static func unknown(_ number: UInt) -> String {
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return "\(UNKNOWN) \(number)"
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}
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static func getSeparator(breakingLines: Bool) -> String {
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return breakingLines ? MULTILINE_WITH_LINE_BREAK_SEPARATOR : MULTILINE_WITHOUT_LINE_BREAK_SEPARATOR
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}
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}
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93
passKit/Parser/Parser.swift
Normal file
93
passKit/Parser/Parser.swift
Normal file
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@ -0,0 +1,93 @@
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//
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// Parser.swift
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// passKit
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//
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// Created by Danny Moesch on 16.08.18.
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// Copyright © 2018 Bob Sun. All rights reserved.
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//
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class Parser {
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let firstLine: String
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let additionsSection: String
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let purgedAdditionalLines: [String]
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// The parsing process is expensive. This field makes sure it is only done once if actually needed.
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private(set) lazy var additionFields = getAdditionFields()
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init(plainText: String) {
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let splittedPlainText = plainText
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.split(omittingEmptySubsequences: false) { $0 == "\n" || $0 == "\r\n" }
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.map(String.init)
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firstLine = splittedPlainText.first!
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additionsSection = splittedPlainText[1...].joined(separator: "\n")
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purgedAdditionalLines = splittedPlainText[1...].filter { !$0.isEmpty }
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}
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private func getAdditionFields() -> [AdditionField] {
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var additions: [AdditionField] = []
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var unknownIndex: UInt = 0
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var i = purgedAdditionalLines.startIndex
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while i < purgedAdditionalLines.count {
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let line = purgedAdditionalLines[i]
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i += 1
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var (key, value) = Parser.getKeyValuePair(from: line)
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if key == nil {
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unknownIndex += 1
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key = Constants.unknown(unknownIndex)
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} else if value == Constants.MULTILINE_WITH_LINE_BREAK_INDICATOR {
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value = gatherMultilineValue(startingAt: &i, removingLineBreaks: false)
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} else if value == Constants.MULTILINE_WITHOUT_LINE_BREAK_INDICATOR {
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value = gatherMultilineValue(startingAt: &i, removingLineBreaks: true)
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}
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additions.append(key! => value)
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}
|
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return additions
|
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}
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||||
|
||||
private func gatherMultilineValue(startingAt i: inout Int, removingLineBreaks: Bool) -> String {
|
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var result = ""
|
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guard i < purgedAdditionalLines.count else {
|
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return result
|
||||
}
|
||||
let numberInitialBlanks = purgedAdditionalLines[i].enumerated().first {
|
||||
$1 != Character(Constants.BLANK)
|
||||
}?.0 ?? purgedAdditionalLines[i].count
|
||||
guard numberInitialBlanks != 0 else {
|
||||
return result
|
||||
}
|
||||
let initialBlanks = String(repeating: Constants.BLANK, count: numberInitialBlanks)
|
||||
|
||||
while i < purgedAdditionalLines.count && purgedAdditionalLines[i].starts(with: initialBlanks) {
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result.append(String(purgedAdditionalLines[i].dropFirst(numberInitialBlanks)))
|
||||
result.append(Constants.getSeparator(breakingLines: !removingLineBreaks))
|
||||
i += 1
|
||||
}
|
||||
return result.trimmingCharacters(in: .whitespacesAndNewlines)
|
||||
}
|
||||
|
||||
/// Split line from password file in to a key-value pair separted by `: `.
|
||||
///
|
||||
/// - Parameter line: Line from a password file
|
||||
/// - Returns: Pair of two `String`s of which the first one can be 'nil'
|
||||
static func getKeyValuePair(from line: String) -> (key: String?, value: String) {
|
||||
let items = line.components(separatedBy: ": ").map { String($0).trimmingCharacters(in: .whitespaces) }
|
||||
var key: String?
|
||||
var value = ""
|
||||
if items.count == 1 || (items[0].isEmpty && items[1].isEmpty) {
|
||||
// No ': ' found, or empty on both sides of ': '.
|
||||
value = line
|
||||
// "otpauth" special case
|
||||
if value.hasPrefix(Constants.OTPAUTH_URL_START) {
|
||||
key = Constants.OTPAUTH
|
||||
}
|
||||
} else {
|
||||
if !items[0].isEmpty {
|
||||
key = items[0]
|
||||
}
|
||||
value = items[1]
|
||||
}
|
||||
return (key, value)
|
||||
}
|
||||
}
|
||||
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