1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
// SPDX-License-Identifier: MIT
// Copyright © 2018-2019 WireGuard LLC. All Rights Reserved.
import NetworkExtension
enum PacketTunnelProviderError: String, Error {
case savedProtocolConfigurationIsInvalid
case dnsResolutionFailure
case couldNotStartBackend
case couldNotDetermineFileDescriptor
case couldNotSetNetworkSettings
}
extension NETunnelProviderProtocol {
convenience init?(tunnelConfiguration: TunnelConfiguration, previouslyFrom old: NEVPNProtocol? = nil) {
self.init()
guard let name = tunnelConfiguration.name else { return nil }
guard let appId = Bundle.main.bundleIdentifier else { return nil }
providerBundleIdentifier = "\(appId).network-extension"
passwordReference = Keychain.makeReference(containing: tunnelConfiguration.asWgQuickConfig(), called: name, previouslyReferencedBy: old?.passwordReference)
if passwordReference == nil {
return nil
}
let endpoints = tunnelConfiguration.peers.compactMap { $0.endpoint }
if endpoints.count == 1 {
serverAddress = endpoints[0].stringRepresentation
} else if endpoints.isEmpty {
serverAddress = "Unspecified"
} else {
serverAddress = "Multiple endpoints"
}
}
func asTunnelConfiguration(called name: String? = nil) -> TunnelConfiguration? {
migrateConfigurationIfNeeded(called: name ?? "unknown")
//TODO: in the case where migrateConfigurationIfNeeded is called by the network extension,
// before the app has started, and when there is, in fact, configuration that needs to be
// put into the keychain, this will generate one new keychain item every time it is started,
// until finally the app is open. Would it be possible to call saveToPreferences here? Or is
// that generally not available to network extensions? In which case, what should our
// behavior be?
guard let passwordReference = passwordReference else { return nil }
guard let config = Keychain.openReference(called: passwordReference) else { return nil }
return try? TunnelConfiguration(fromWgQuickConfig: config, called: name)
}
func destroyConfigurationReference() {
guard let ref = passwordReference else { return }
Keychain.deleteReference(called: ref)
}
func verifyConfigurationReference() -> Data? {
guard let ref = passwordReference else { return nil }
return Keychain.verifyReference(called: ref) ? ref : nil
}
@discardableResult
func migrateConfigurationIfNeeded(called name: String) -> Bool {
/* This is how we did things before we switched to putting items
* in the keychain. But it's still useful to keep the migration
* around so that .mobileconfig files are easier.
*/
guard let oldConfig = providerConfiguration?["WgQuickConfig"] as? String else { return false }
providerConfiguration = nil
guard passwordReference == nil else { return true }
passwordReference = Keychain.makeReference(containing: oldConfig, called: name)
return true
}
}
|
