mirror of
https://github.com/permissionlesstech/bitchat.git
synced 2026-07-25 11:45:19 +00:00
a30b73dd99
* Fix fragmentation + BLE long-write + padding - Accumulate CBATTRequest long writes by offset and decode once per central - Decode original packet after fragment reassembly (preserve flags/compression) - Switch MessagePadding to strict PKCS#7 and validate before unpadding - Make BinaryProtocol.decode robust: try raw first, then unpad fallback - Unpad frames before BLE notify; fragment when exceeding centrals' max update length - Skip notify path when max update length < 21 bytes (protocol minimum) Verified large PMs and announces route without decode errors and peers show reliably. * Tests: fix weak delegate lifetime, legacy constants, and unused vars; fragment unpadded frames - BLEServiceTests: hold strong reference to MockBitchatDelegate - IntegrationTests: fix inline comment braces; replace removed types with test-safe values; use numeric 0x06 for legacy handshake resp checks - BinaryProtocolTests: remove unused minResult variable - BLEService: fragment the unpadded frame so fragments are efficient * tests: add Noise rehandshake recovery test; document in-memory test bus and autoFlood; stabilize large-network broadcast * tests: align suite with current behavior (compression, padding, routing, nonce); deflake and stabilize --------- Co-authored-by: jack <jackjackbits@users.noreply.github.com>
559 lines
24 KiB
Swift
559 lines
24 KiB
Swift
//
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// NoiseProtocolTests.swift
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// bitchatTests
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//
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// This is free and unencumbered software released into the public domain.
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// For more information, see <https://unlicense.org>
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//
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import XCTest
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import CryptoKit
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@testable import bitchat
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final class NoiseProtocolTests: XCTestCase {
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var aliceKey: Curve25519.KeyAgreement.PrivateKey!
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var bobKey: Curve25519.KeyAgreement.PrivateKey!
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var aliceSession: NoiseSession!
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var bobSession: NoiseSession!
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override func setUp() {
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super.setUp()
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aliceKey = Curve25519.KeyAgreement.PrivateKey()
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bobKey = Curve25519.KeyAgreement.PrivateKey()
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}
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override func tearDown() {
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aliceSession = nil
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bobSession = nil
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super.tearDown()
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}
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// MARK: - Basic Handshake Tests
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func testXXPatternHandshake() throws {
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// Create sessions
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aliceSession = NoiseSession(
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peerID: TestConstants.testPeerID2,
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role: .initiator,
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localStaticKey: aliceKey
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)
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bobSession = NoiseSession(
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peerID: TestConstants.testPeerID1,
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role: .responder,
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localStaticKey: bobKey
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)
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// Alice starts handshake (message 1)
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let message1 = try aliceSession.startHandshake()
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XCTAssertFalse(message1.isEmpty)
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XCTAssertEqual(aliceSession.getState(), .handshaking)
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// Bob processes message 1 and creates message 2
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let message2 = try bobSession.processHandshakeMessage(message1)
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XCTAssertNotNil(message2)
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XCTAssertFalse(message2!.isEmpty)
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XCTAssertEqual(bobSession.getState(), .handshaking)
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// Alice processes message 2 and creates message 3
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let message3 = try aliceSession.processHandshakeMessage(message2!)
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XCTAssertNotNil(message3)
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XCTAssertFalse(message3!.isEmpty)
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XCTAssertEqual(aliceSession.getState(), .established)
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// Bob processes message 3 and completes handshake
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let finalMessage = try bobSession.processHandshakeMessage(message3!)
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XCTAssertNil(finalMessage) // No more messages needed
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XCTAssertEqual(bobSession.getState(), .established)
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// Verify both sessions are established
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XCTAssertTrue(aliceSession.isEstablished())
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XCTAssertTrue(bobSession.isEstablished())
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// Verify they have each other's static keys
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XCTAssertEqual(aliceSession.getRemoteStaticPublicKey()?.rawRepresentation, bobKey.publicKey.rawRepresentation)
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XCTAssertEqual(bobSession.getRemoteStaticPublicKey()?.rawRepresentation, aliceKey.publicKey.rawRepresentation)
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}
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func testHandshakeStateValidation() throws {
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aliceSession = NoiseSession(
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peerID: TestConstants.testPeerID2,
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role: .initiator,
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localStaticKey: aliceKey
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)
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// Cannot process message before starting handshake
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XCTAssertThrowsError(try aliceSession.processHandshakeMessage(Data()))
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// Start handshake
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_ = try aliceSession.startHandshake()
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// Cannot start handshake twice
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XCTAssertThrowsError(try aliceSession.startHandshake())
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}
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// MARK: - Encryption/Decryption Tests
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func testBasicEncryptionDecryption() throws {
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// Establish sessions
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try establishSessions()
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let plaintext = "Hello, Bob!".data(using: .utf8)!
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// Alice encrypts
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let ciphertext = try aliceSession.encrypt(plaintext)
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XCTAssertNotEqual(ciphertext, plaintext)
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XCTAssertGreaterThan(ciphertext.count, plaintext.count) // Should have overhead
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// Bob decrypts
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let decrypted = try bobSession.decrypt(ciphertext)
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XCTAssertEqual(decrypted, plaintext)
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}
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func testBidirectionalEncryption() throws {
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try establishSessions()
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// Alice -> Bob
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let aliceMessage = "Hello from Alice".data(using: .utf8)!
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let aliceCiphertext = try aliceSession.encrypt(aliceMessage)
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let bobReceived = try bobSession.decrypt(aliceCiphertext)
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XCTAssertEqual(bobReceived, aliceMessage)
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// Bob -> Alice
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let bobMessage = "Hello from Bob".data(using: .utf8)!
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let bobCiphertext = try bobSession.encrypt(bobMessage)
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let aliceReceived = try aliceSession.decrypt(bobCiphertext)
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XCTAssertEqual(aliceReceived, bobMessage)
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}
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func testLargeMessageEncryption() throws {
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try establishSessions()
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// Create a large message
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let largeMessage = TestHelpers.generateRandomData(length: 100_000)
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// Encrypt and decrypt
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let ciphertext = try aliceSession.encrypt(largeMessage)
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let decrypted = try bobSession.decrypt(ciphertext)
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XCTAssertEqual(decrypted, largeMessage)
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}
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func testEncryptionBeforeHandshake() {
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aliceSession = NoiseSession(
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peerID: TestConstants.testPeerID2,
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role: .initiator,
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localStaticKey: aliceKey
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)
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let plaintext = "test".data(using: .utf8)!
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// Should throw when not established
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XCTAssertThrowsError(try aliceSession.encrypt(plaintext))
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XCTAssertThrowsError(try aliceSession.decrypt(plaintext))
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}
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// MARK: - Session Manager Tests
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func testSessionManagerBasicOperations() throws {
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let manager = NoiseSessionManager(localStaticKey: aliceKey)
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// Create session
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let session = manager.createSession(for: TestConstants.testPeerID2, role: .initiator)
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XCTAssertNotNil(session)
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// Get session
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let retrieved = manager.getSession(for: TestConstants.testPeerID2)
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XCTAssertNotNil(retrieved)
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XCTAssertTrue(session === retrieved)
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// Remove session
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manager.removeSession(for: TestConstants.testPeerID2)
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XCTAssertNil(manager.getSession(for: TestConstants.testPeerID2))
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}
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func testSessionManagerHandshakeInitiation() throws {
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let manager = NoiseSessionManager(localStaticKey: aliceKey)
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// Initiate handshake
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let handshakeData = try manager.initiateHandshake(with: TestConstants.testPeerID2)
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XCTAssertFalse(handshakeData.isEmpty)
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// Session should exist
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let session = manager.getSession(for: TestConstants.testPeerID2)
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XCTAssertNotNil(session)
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XCTAssertEqual(session?.getState(), .handshaking)
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}
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func testSessionManagerIncomingHandshake() throws {
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let aliceManager = NoiseSessionManager(localStaticKey: aliceKey)
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let bobManager = NoiseSessionManager(localStaticKey: bobKey)
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// Alice initiates
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let message1 = try aliceManager.initiateHandshake(with: TestConstants.testPeerID2)
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// Bob responds
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let message2 = try bobManager.handleIncomingHandshake(from: TestConstants.testPeerID1, message: message1)
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XCTAssertNotNil(message2)
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// Continue handshake
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let message3 = try aliceManager.handleIncomingHandshake(from: TestConstants.testPeerID2, message: message2!)
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XCTAssertNotNil(message3)
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// Complete handshake
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let finalMessage = try bobManager.handleIncomingHandshake(from: TestConstants.testPeerID1, message: message3!)
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XCTAssertNil(finalMessage)
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// Both should have established sessions
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XCTAssertTrue(aliceManager.getSession(for: TestConstants.testPeerID2)?.isEstablished() ?? false)
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XCTAssertTrue(bobManager.getSession(for: TestConstants.testPeerID1)?.isEstablished() ?? false)
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}
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func testSessionManagerEncryptionDecryption() throws {
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let aliceManager = NoiseSessionManager(localStaticKey: aliceKey)
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let bobManager = NoiseSessionManager(localStaticKey: bobKey)
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// Establish sessions
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try establishManagerSessions(aliceManager: aliceManager, bobManager: bobManager)
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// Encrypt with manager
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let plaintext = "Test message".data(using: .utf8)!
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let ciphertext = try aliceManager.encrypt(plaintext, for: TestConstants.testPeerID2)
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// Decrypt with manager
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let decrypted = try bobManager.decrypt(ciphertext, from: TestConstants.testPeerID1)
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XCTAssertEqual(decrypted, plaintext)
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}
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// MARK: - Security Tests
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func testTamperedCiphertextDetection() throws {
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try establishSessions()
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let plaintext = "Secret message".data(using: .utf8)!
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var ciphertext = try aliceSession.encrypt(plaintext)
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// Tamper with ciphertext
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ciphertext[ciphertext.count / 2] ^= 0xFF
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// Decryption should fail
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XCTAssertThrowsError(try bobSession.decrypt(ciphertext))
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}
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func testReplayPrevention() throws {
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try establishSessions()
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let plaintext = "Test message".data(using: .utf8)!
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let ciphertext = try aliceSession.encrypt(plaintext)
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// First decryption should succeed
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_ = try bobSession.decrypt(ciphertext)
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// Replaying the same ciphertext should fail
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XCTAssertThrowsError(try bobSession.decrypt(ciphertext))
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}
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func testSessionIsolation() throws {
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// Create two separate session pairs
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let aliceSession1 = NoiseSession(peerID: "peer1", role: .initiator, localStaticKey: aliceKey)
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let bobSession1 = NoiseSession(peerID: "alice1", role: .responder, localStaticKey: bobKey)
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let aliceSession2 = NoiseSession(peerID: "peer2", role: .initiator, localStaticKey: aliceKey)
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let bobSession2 = NoiseSession(peerID: "alice2", role: .responder, localStaticKey: bobKey)
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// Establish both pairs
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try performHandshake(initiator: aliceSession1, responder: bobSession1)
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try performHandshake(initiator: aliceSession2, responder: bobSession2)
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// Encrypt with session 1
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let plaintext = "Secret".data(using: .utf8)!
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let ciphertext1 = try aliceSession1.encrypt(plaintext)
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// Should not be able to decrypt with session 2
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XCTAssertThrowsError(try bobSession2.decrypt(ciphertext1))
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// But should work with correct session
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let decrypted = try bobSession1.decrypt(ciphertext1)
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XCTAssertEqual(decrypted, plaintext)
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}
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// MARK: - Session Recovery Tests
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func testPeerRestartDetection() throws {
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// Establish initial sessions
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let aliceManager = NoiseSessionManager(localStaticKey: aliceKey)
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let bobManager = NoiseSessionManager(localStaticKey: bobKey)
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try establishManagerSessions(aliceManager: aliceManager, bobManager: bobManager)
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// Exchange some messages to establish nonce state
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let message1 = try aliceManager.encrypt("Hello".data(using: .utf8)!, for: TestConstants.testPeerID2)
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_ = try bobManager.decrypt(message1, from: TestConstants.testPeerID1)
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let message2 = try bobManager.encrypt("World".data(using: .utf8)!, for: TestConstants.testPeerID1)
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_ = try aliceManager.decrypt(message2, from: TestConstants.testPeerID2)
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// Simulate Bob restart by creating new manager with same key
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let bobManagerRestarted = NoiseSessionManager(localStaticKey: bobKey)
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// Bob initiates new handshake after restart
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let newHandshake1 = try bobManagerRestarted.initiateHandshake(with: TestConstants.testPeerID1)
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// Alice should accept the new handshake (clearing old session)
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let newHandshake2 = try aliceManager.handleIncomingHandshake(from: TestConstants.testPeerID2, message: newHandshake1)
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XCTAssertNotNil(newHandshake2)
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// Complete the new handshake
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let newHandshake3 = try bobManagerRestarted.handleIncomingHandshake(from: TestConstants.testPeerID1, message: newHandshake2!)
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XCTAssertNotNil(newHandshake3)
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_ = try aliceManager.handleIncomingHandshake(from: TestConstants.testPeerID2, message: newHandshake3!)
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// Should be able to exchange messages with new sessions
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let testMessage = "After restart".data(using: .utf8)!
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let encrypted = try bobManagerRestarted.encrypt(testMessage, for: TestConstants.testPeerID1)
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let decrypted = try aliceManager.decrypt(encrypted, from: TestConstants.testPeerID2)
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XCTAssertEqual(decrypted, testMessage)
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}
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func testNonceDesynchronizationRecovery() throws {
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// Create two sessions
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aliceSession = NoiseSession(peerID: TestConstants.testPeerID2, role: .initiator, localStaticKey: aliceKey)
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bobSession = NoiseSession(peerID: TestConstants.testPeerID1, role: .responder, localStaticKey: bobKey)
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// Establish sessions
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try performHandshake(initiator: aliceSession, responder: bobSession)
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// Exchange messages to advance nonces
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for i in 0..<5 {
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let msg = try aliceSession.encrypt("Message \(i)".data(using: .utf8)!)
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_ = try bobSession.decrypt(msg)
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}
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// Simulate desynchronization by encrypting but not decrypting
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for i in 0..<3 {
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_ = try aliceSession.encrypt("Lost message \(i)".data(using: .utf8)!)
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}
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// With per-packet nonce carried, decryption should not throw here
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let desyncMessage = try aliceSession.encrypt("This now succeeds".data(using: .utf8)!)
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XCTAssertNoThrow(try bobSession.decrypt(desyncMessage))
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}
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func testConcurrentEncryption() throws {
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// Test thread safety of encryption operations
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let aliceManager = NoiseSessionManager(localStaticKey: aliceKey)
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let bobManager = NoiseSessionManager(localStaticKey: bobKey)
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try establishManagerSessions(aliceManager: aliceManager, bobManager: bobManager)
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let messageCount = 100
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let expectation = XCTestExpectation(description: "All messages encrypted and decrypted")
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expectation.expectedFulfillmentCount = messageCount
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var encryptedMessages: [Int: Data] = [:]
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// Encrypt messages sequentially to avoid nonce races in manager
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for i in 0..<messageCount {
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let plaintext = "Concurrent message \(i)".data(using: .utf8)!
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let encrypted = try aliceManager.encrypt(plaintext, for: TestConstants.testPeerID2)
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encryptedMessages[i] = encrypted
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}
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// Decrypt messages sequentially to avoid triggering anti-replay with reordering
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for i in 0..<messageCount {
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do {
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guard let encrypted = encryptedMessages[i] else {
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XCTFail("Missing encrypted message \(i)")
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return
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}
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let decrypted = try bobManager.decrypt(encrypted, from: TestConstants.testPeerID1)
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let expected = "Concurrent message \(i)".data(using: .utf8)!
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XCTAssertEqual(decrypted, expected)
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expectation.fulfill()
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} catch {
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XCTFail("Decryption failed for message \(i): \(error)")
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}
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}
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wait(for: [expectation], timeout: 10.0)
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}
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func testSessionStaleDetection() throws {
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// Test that sessions are properly marked as stale
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let aliceManager = NoiseSessionManager(localStaticKey: aliceKey)
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let bobManager = NoiseSessionManager(localStaticKey: bobKey)
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try establishManagerSessions(aliceManager: aliceManager, bobManager: bobManager)
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// Get the session and check it needs renegotiation based on age
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let sessions = aliceManager.getSessionsNeedingRekey()
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// New session should not need rekey
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XCTAssertTrue(sessions.isEmpty || sessions.allSatisfy { !$0.needsRekey })
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}
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func testHandshakeAfterDecryptionFailure() throws {
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// Test that handshake is properly initiated after decryption failure
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let aliceManager = NoiseSessionManager(localStaticKey: aliceKey)
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let bobManager = NoiseSessionManager(localStaticKey: bobKey)
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// Establish sessions
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try establishManagerSessions(aliceManager: aliceManager, bobManager: bobManager)
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// Create a corrupted message
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var encrypted = try aliceManager.encrypt("Test".data(using: .utf8)!, for: TestConstants.testPeerID2)
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encrypted[10] ^= 0xFF // Corrupt the data
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// Decryption should fail
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XCTAssertThrowsError(try bobManager.decrypt(encrypted, from: TestConstants.testPeerID1))
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// Bob should still have the session (it's not removed on single failure)
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XCTAssertNotNil(bobManager.getSession(for: TestConstants.testPeerID1))
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}
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func testHandshakeAlwaysAcceptedWithExistingSession() throws {
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// Test that handshake is always accepted even with existing valid session
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let aliceManager = NoiseSessionManager(localStaticKey: aliceKey)
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let bobManager = NoiseSessionManager(localStaticKey: bobKey)
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// Establish sessions
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try establishManagerSessions(aliceManager: aliceManager, bobManager: bobManager)
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// Verify sessions are established
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XCTAssertTrue(aliceManager.getSession(for: TestConstants.testPeerID2)?.isEstablished() ?? false)
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XCTAssertTrue(bobManager.getSession(for: TestConstants.testPeerID1)?.isEstablished() ?? false)
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// Exchange messages to verify sessions work
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let testMessage = "Session works".data(using: .utf8)!
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let encrypted = try aliceManager.encrypt(testMessage, for: TestConstants.testPeerID2)
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let decrypted = try bobManager.decrypt(encrypted, from: TestConstants.testPeerID1)
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XCTAssertEqual(decrypted, testMessage)
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// Alice clears her session (simulating decryption failure)
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aliceManager.removeSession(for: TestConstants.testPeerID2)
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// Alice initiates new handshake despite Bob having valid session
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let newHandshake1 = try aliceManager.initiateHandshake(with: TestConstants.testPeerID2)
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// Bob should accept the new handshake even though he has a valid session
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let newHandshake2 = try bobManager.handleIncomingHandshake(from: TestConstants.testPeerID1, message: newHandshake1)
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XCTAssertNotNil(newHandshake2, "Bob should accept handshake despite having valid session")
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// Complete the handshake
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let newHandshake3 = try aliceManager.handleIncomingHandshake(from: TestConstants.testPeerID2, message: newHandshake2!)
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XCTAssertNotNil(newHandshake3)
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_ = try bobManager.handleIncomingHandshake(from: TestConstants.testPeerID1, message: newHandshake3!)
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// Verify new sessions work
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let testMessage2 = "New session works".data(using: .utf8)!
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let encrypted2 = try aliceManager.encrypt(testMessage2, for: TestConstants.testPeerID2)
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let decrypted2 = try bobManager.decrypt(encrypted2, from: TestConstants.testPeerID1)
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XCTAssertEqual(decrypted2, testMessage2)
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}
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func testNonceDesynchronizationCausesRehandshake() throws {
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// Test that nonce desynchronization leads to proper re-handshake
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let aliceManager = NoiseSessionManager(localStaticKey: aliceKey)
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let bobManager = NoiseSessionManager(localStaticKey: bobKey)
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// Establish sessions
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try establishManagerSessions(aliceManager: aliceManager, bobManager: bobManager)
|
|
|
|
// Exchange messages normally
|
|
for i in 0..<5 {
|
|
let msg = try aliceManager.encrypt("Message \(i)".data(using: .utf8)!, for: TestConstants.testPeerID2)
|
|
_ = try bobManager.decrypt(msg, from: TestConstants.testPeerID1)
|
|
}
|
|
|
|
// Simulate desynchronization - Alice sends messages that Bob doesn't receive
|
|
for i in 0..<3 {
|
|
_ = try aliceManager.encrypt("Lost message \(i)".data(using: .utf8)!, for: TestConstants.testPeerID2)
|
|
}
|
|
|
|
// With nonce carried in packet, decryption should not throw here
|
|
let desyncMessage = try aliceManager.encrypt("This now succeeds".data(using: .utf8)!, for: TestConstants.testPeerID2)
|
|
XCTAssertNoThrow(try bobManager.decrypt(desyncMessage, from: TestConstants.testPeerID1))
|
|
|
|
// Bob clears session and initiates new handshake
|
|
bobManager.removeSession(for: TestConstants.testPeerID1)
|
|
let rehandshake1 = try bobManager.initiateHandshake(with: TestConstants.testPeerID1)
|
|
|
|
// Alice should accept despite having a "valid" (but desynced) session
|
|
let rehandshake2 = try aliceManager.handleIncomingHandshake(from: TestConstants.testPeerID2, message: rehandshake1)
|
|
XCTAssertNotNil(rehandshake2, "Alice should accept handshake to fix desync")
|
|
|
|
// Complete handshake
|
|
let rehandshake3 = try bobManager.handleIncomingHandshake(from: TestConstants.testPeerID1, message: rehandshake2!)
|
|
XCTAssertNotNil(rehandshake3)
|
|
_ = try aliceManager.handleIncomingHandshake(from: TestConstants.testPeerID2, message: rehandshake3!)
|
|
|
|
// Verify communication works again
|
|
let testResynced = "Resynced".data(using: .utf8)!
|
|
let encryptedResync = try aliceManager.encrypt(testResynced, for: TestConstants.testPeerID2)
|
|
let decryptedResync = try bobManager.decrypt(encryptedResync, from: TestConstants.testPeerID1)
|
|
XCTAssertEqual(decryptedResync, testResynced)
|
|
}
|
|
|
|
// MARK: - Performance Tests
|
|
|
|
func testHandshakePerformance() throws {
|
|
measure {
|
|
do {
|
|
let alice = NoiseSession(peerID: "bob", role: .initiator, localStaticKey: aliceKey)
|
|
let bob = NoiseSession(peerID: "alice", role: .responder, localStaticKey: bobKey)
|
|
try performHandshake(initiator: alice, responder: bob)
|
|
} catch {
|
|
XCTFail("Handshake failed: \(error)")
|
|
}
|
|
}
|
|
}
|
|
|
|
func testEncryptionPerformance() throws {
|
|
try establishSessions()
|
|
let message = TestHelpers.generateRandomData(length: 1024)
|
|
|
|
measure {
|
|
do {
|
|
for _ in 0..<100 {
|
|
let ciphertext = try aliceSession.encrypt(message)
|
|
_ = try bobSession.decrypt(ciphertext)
|
|
}
|
|
} catch {
|
|
XCTFail("Encryption/decryption failed: \(error)")
|
|
}
|
|
}
|
|
}
|
|
|
|
// MARK: - Helper Methods
|
|
|
|
private func establishSessions() throws {
|
|
aliceSession = NoiseSession(
|
|
peerID: TestConstants.testPeerID2,
|
|
role: .initiator,
|
|
localStaticKey: aliceKey
|
|
)
|
|
|
|
bobSession = NoiseSession(
|
|
peerID: TestConstants.testPeerID1,
|
|
role: .responder,
|
|
localStaticKey: bobKey
|
|
)
|
|
|
|
try performHandshake(initiator: aliceSession, responder: bobSession)
|
|
}
|
|
|
|
private func performHandshake(initiator: NoiseSession, responder: NoiseSession) throws {
|
|
let msg1 = try initiator.startHandshake()
|
|
let msg2 = try responder.processHandshakeMessage(msg1)!
|
|
let msg3 = try initiator.processHandshakeMessage(msg2)!
|
|
_ = try responder.processHandshakeMessage(msg3)
|
|
}
|
|
|
|
private func establishManagerSessions(aliceManager: NoiseSessionManager, bobManager: NoiseSessionManager) throws {
|
|
let msg1 = try aliceManager.initiateHandshake(with: TestConstants.testPeerID2)
|
|
let msg2 = try bobManager.handleIncomingHandshake(from: TestConstants.testPeerID1, message: msg1)!
|
|
let msg3 = try aliceManager.handleIncomingHandshake(from: TestConstants.testPeerID2, message: msg2)!
|
|
_ = try bobManager.handleIncomingHandshake(from: TestConstants.testPeerID1, message: msg3)
|
|
}
|
|
}
|