106 lines
3.2 KiB
Swift
106 lines
3.2 KiB
Swift
//
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// Validators.swift
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// Passepartout
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//
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// Created by Davide De Rosa on 3/31/22.
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// Copyright (c) 2023 Davide De Rosa. All rights reserved.
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//
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// https://github.com/passepartoutvpn
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//
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// This file is part of Passepartout.
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//
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// Passepartout is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Passepartout is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Passepartout. If not, see <http://www.gnu.org/licenses/>.
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//
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import Foundation
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public struct Validators {
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public enum ValidationError: Error {
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case notSet
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case empty
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case ipAddress
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case socketPort
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case domainName
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case wildcardDomainName
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case url
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}
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private static let rxDomainName = NSRegularExpression("^((?!-)[A-Za-z0-9-]{1,63}(?<!-)\\.)+[A-Za-z]{2,}$")
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private static let rxWildcardDomainName = NSRegularExpression("^((?!-)[A-Za-z0-9-]{1,63}(?<!-)\\.|\\*\\.)+([A-Za-z]{2,}|\\*)$")
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public static func notNil(_ string: String?) throws {
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guard string != nil else {
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throw ValidationError.notSet
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}
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}
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public static func notEmpty(_ string: String) throws {
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let valid = string.trimmingCharacters(in: .whitespacesAndNewlines)
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guard !valid.isEmpty else {
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throw ValidationError.empty
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}
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}
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public static func ipAddress(_ string: String) throws {
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var sin = sockaddr_in()
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var sin6 = sockaddr_in6()
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guard string.withCString({ cstring in inet_pton(AF_INET6, cstring, &sin6.sin6_addr) }) == 1 ||
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string.withCString({ cstring in inet_pton(AF_INET, cstring, &sin.sin_addr) }) == 1 else {
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throw ValidationError.ipAddress
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}
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}
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public static func socketPort(_ string: String) throws {
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guard let num = Int(string),
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(Int(UInt16.min)...Int(UInt16.max)).contains(num) else {
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throw ValidationError.socketPort
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}
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}
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public static func domainName(_ string: String) throws {
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guard rxDomainName.numberOfMatches(in: string, options: [], range: .init(location: 0, length: string.count)) > 0 else {
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throw ValidationError.domainName
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}
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}
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public static func wildcardDomainName(_ string: String) throws {
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guard rxWildcardDomainName.numberOfMatches(in: string, options: [], range: .init(location: 0, length: string.count)) > 0 else {
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throw ValidationError.wildcardDomainName
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}
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}
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public static func url(_ string: String) throws {
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guard URL(string: string) != nil else {
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throw ValidationError.url
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}
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}
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public static func dnsOverTLSServerName(_ string: String) throws {
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do {
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try domainName(string)
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} catch {
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try ipAddress(string)
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}
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}
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}
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