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//
// SingleHopEphemeralPeerExchangerTests.swift
// MullvadPostQuantumTests
//
// Created by Mojgan on 2024-07-17.
// Copyright © 2025 Mullvad VPN AB. All rights reserved.
//
import XCTest
@testable import MullvadMockData
@testable import MullvadREST
@testable import MullvadRustRuntime
@testable import MullvadTypes
@testable import WireGuardKitTypes
final class SingleHopEphemeralPeerExchangerTests: XCTestCase {
var exitRelay: SelectedRelay!
override func setUpWithError() throws {
let relayConstraints = RelayConstraints(
exitLocations: .only(UserSelectedRelays(locations: [.hostname("se", "sto", "se6-wireguard")]))
)
let candidates = try RelaySelector.WireGuard.findCandidates(
by: relayConstraints.exitLocations,
in: ServerRelaysResponseStubs.sampleRelays,
filterConstraint: relayConstraints.filter,
daitaEnabled: false
)
let match = try RelaySelector.WireGuard.pickCandidate(
from: candidates,
wireguard: ServerRelaysResponseStubs.sampleRelays.wireguard,
portConstraint: relayConstraints.port,
numberOfFailedAttempts: 0
)
exitRelay = SelectedRelay(
endpoint: match.endpoint,
hostname: match.relay.hostname,
location: match.location,
features: nil
)
}
func testEphemeralPeerExchangeFailsWhenNegotiationCannotStart() async {
let expectedNegotiationFailure = expectation(description: "Negotiation failed.")
let reconfigurationExpectation = expectation(description: "Tunnel reconfiguration took place")
reconfigurationExpectation.expectedFulfillmentCount = 1
let negotiationSuccessful = expectation(description: "Negotiation succeeded.")
negotiationSuccessful.isInverted = true
let keyExchangeActor = EphemeralPeerExchangeActorStub()
keyExchangeActor.result = .failure(EphemeralPeerExchangeErrorStub.canceled)
let singleHopPostQuantumKeyExchanging = SingleHopEphemeralPeerExchanger(
exit: exitRelay,
devicePrivateKey: PrivateKey(),
keyExchanger: keyExchangeActor,
enablePostQuantum: true,
enableDaita: false
) { _ in
reconfigurationExpectation.fulfill()
} onFinish: {
negotiationSuccessful.fulfill()
}
keyExchangeActor.delegate = KeyExchangingResultStub {
expectedNegotiationFailure.fulfill()
}
await singleHopPostQuantumKeyExchanging.start()
await fulfillment(
of: [expectedNegotiationFailure, reconfigurationExpectation, negotiationSuccessful],
timeout: .UnitTest.invertedTimeout
)
}
func testEphemeralPeerExchangeSuccessWhenPostQuantumNegotiationStarts() async throws {
let unexpectedNegotiationFailure = expectation(description: "Negotiation failed.")
unexpectedNegotiationFailure.isInverted = true
let reconfigurationExpectation = expectation(description: "Tunnel reconfiguration took place")
reconfigurationExpectation.expectedFulfillmentCount = 2
let negotiationSuccessful = expectation(description: "Negotiation succeeded.")
negotiationSuccessful.expectedFulfillmentCount = 1
let keyExchangeActor = EphemeralPeerExchangeActorStub()
let preSharedKey = try XCTUnwrap(PreSharedKey(hexKey: PrivateKey().hexKey))
keyExchangeActor.result = .success((preSharedKey, PrivateKey()))
let singleHopPostQuantumKeyExchanging = SingleHopEphemeralPeerExchanger(
exit: exitRelay,
devicePrivateKey: PrivateKey(),
keyExchanger: keyExchangeActor,
enablePostQuantum: true,
enableDaita: false
) { _ in
reconfigurationExpectation.fulfill()
} onFinish: {
negotiationSuccessful.fulfill()
}
keyExchangeActor
.delegate = KeyExchangingResultStub(onReceivePostQuantumKey: { preSharedKey, ephemeralKey, daita in
await singleHopPostQuantumKeyExchanging.receivePostQuantumKey(
preSharedKey,
ephemeralKey: ephemeralKey,
daitaParameters: daita
)
})
await singleHopPostQuantumKeyExchanging.start()
await fulfillment(
of: [unexpectedNegotiationFailure, reconfigurationExpectation, negotiationSuccessful],
timeout: .UnitTest.invertedTimeout
)
}
func testEphemeralPeerExchangeSuccessWhenDaitaNegotiationStarts() async throws {
let unexpectedNegotiationFailure = expectation(description: "Negotiation failed.")
unexpectedNegotiationFailure.isInverted = true
let reconfigurationExpectation = expectation(description: "Tunnel reconfiguration took place")
reconfigurationExpectation.expectedFulfillmentCount = 2
let negotiationSuccessful = expectation(description: "Negotiation succeeded.")
negotiationSuccessful.expectedFulfillmentCount = 1
let peerExchangeActor = EphemeralPeerExchangeActorStub()
let preSharedKey = try XCTUnwrap(PreSharedKey(hexKey: PrivateKey().hexKey))
peerExchangeActor.result = .success((preSharedKey, PrivateKey()))
let multiHopPeerExchanger = SingleHopEphemeralPeerExchanger(
exit: exitRelay,
devicePrivateKey: PrivateKey(),
keyExchanger: peerExchangeActor,
enablePostQuantum: false,
enableDaita: true
) { _ in
reconfigurationExpectation.fulfill()
} onFinish: {
negotiationSuccessful.fulfill()
}
peerExchangeActor.delegate = KeyExchangingResultStub(onReceiveEphemeralPeerPrivateKey: { ephemeralKey, daita in
await multiHopPeerExchanger.receiveEphemeralPeerPrivateKey(ephemeralKey, daitaParameters: daita)
})
await multiHopPeerExchanger.start()
await fulfillment(
of: [unexpectedNegotiationFailure, reconfigurationExpectation, negotiationSuccessful],
timeout: .UnitTest.invertedTimeout
)
}
}
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