mirror of
https://github.com/permissionlesstech/bitchat.git
synced 2026-07-24 23:45:18 +00:00
Add protocol version negotiation for future compatibility
- Add version negotiation messages (0x20 versionHello, 0x21 versionAck) - Implement VersionHello and VersionAck message types with platform info - Add ProtocolVersion struct for version management and negotiation - Update BinaryProtocol to check supported versions - Add version negotiation to connection flow before Noise handshake - Maintain backward compatibility with legacy peers (assume v1) - Add comprehensive test suite with 40+ test cases - Update documentation with version negotiation details This ensures BitChat clients can negotiate protocol versions for smooth upgrades while maintaining full backward compatibility with existing clients.
This commit is contained in:
jack
@@ -199,6 +199,26 @@ enum NoiseError: Error {
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- Automatic cleanup of stale sessions
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- Efficient key rotation
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## Protocol Version Negotiation
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BitChat implements protocol version negotiation to ensure compatibility between different client versions:
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### Version Negotiation Flow
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1. **Version Hello**: Upon connection, peers exchange supported protocol versions
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2. **Version Agreement**: Peers agree on the highest common version
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3. **Graceful Fallback**: Legacy peers without version negotiation assume protocol v1
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### Message Types
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```swift
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case versionHello = 0x20 // Announce supported versions
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case versionAck = 0x21 // Acknowledge and agree on version
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```
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### Backward Compatibility
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- Peers that don't send version negotiation messages are assumed to support v1
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- Future protocol versions can be added to `ProtocolVersion.supportedVersions`
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- Incompatible peers receive a rejection message and disconnect gracefully
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## Future Enhancements
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### Post-Quantum Readiness
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@@ -12,6 +12,14 @@
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04891CAA2E22971E0064A111 /* LRUCache.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04891CA82E22971E0064A111 /* LRUCache.swift */; };
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||||
04AD0B4E2E25B9580002A40A /* IdentityModels.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6E2446380E7A44E49A35B664 /* IdentityModels.swift */; };
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04AD0B4F2E25B9580002A40A /* SecureIdentityStateManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2EE9D4FA625C4671ACD371D4 /* SecureIdentityStateManager.swift */; };
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04AD0B542E2678220002A40A /* VersionNegotiationIntegrationTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04AD0B522E2678220002A40A /* VersionNegotiationIntegrationTests.swift */; };
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04AD0B552E2678220002A40A /* BinaryProtocolVersionTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04AD0B502E2678220002A40A /* BinaryProtocolVersionTests.swift */; };
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04AD0B562E2678220002A40A /* ProtocolVersionNegotiationTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04AD0B512E2678220002A40A /* ProtocolVersionNegotiationTests.swift */; };
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04AD0B572E2678220002A40A /* VersionNegotiationScenarioTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04AD0B532E2678220002A40A /* VersionNegotiationScenarioTests.swift */; };
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04AD0B582E2678220002A40A /* VersionNegotiationIntegrationTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04AD0B522E2678220002A40A /* VersionNegotiationIntegrationTests.swift */; };
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04AD0B592E2678220002A40A /* BinaryProtocolVersionTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04AD0B502E2678220002A40A /* BinaryProtocolVersionTests.swift */; };
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04AD0B5A2E2678220002A40A /* ProtocolVersionNegotiationTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04AD0B512E2678220002A40A /* ProtocolVersionNegotiationTests.swift */; };
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04AD0B5B2E2678220002A40A /* VersionNegotiationScenarioTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04AD0B532E2678220002A40A /* VersionNegotiationScenarioTests.swift */; };
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04B6BA3E2E2035220090FE39 /* NoiseProtocolTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04B6BA3D2E2035220090FE39 /* NoiseProtocolTests.swift */; };
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04B6BA3F2E2035220090FE39 /* NoiseProtocolTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04B6BA3D2E2035220090FE39 /* NoiseProtocolTests.swift */; };
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04B6BA452E2035530090FE39 /* NoiseSecurityConsiderations.swift in Sources */ = {isa = PBXBuildFile; fileRef = 04B6BA422E2035530090FE39 /* NoiseSecurityConsiderations.swift */; };
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@@ -146,6 +154,10 @@
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036A1A705AAF9EC21F4354BE /* PasswordProtectedChannelTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PasswordProtectedChannelTests.swift; sourceTree = "<group>"; };
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03C57F452B55FD0FD8F51421 /* bitchatTests_macOS.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = bitchatTests_macOS.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
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04891CA82E22971E0064A111 /* LRUCache.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LRUCache.swift; sourceTree = "<group>"; };
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04AD0B502E2678220002A40A /* BinaryProtocolVersionTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BinaryProtocolVersionTests.swift; sourceTree = "<group>"; };
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04AD0B512E2678220002A40A /* ProtocolVersionNegotiationTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ProtocolVersionNegotiationTests.swift; sourceTree = "<group>"; };
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04AD0B522E2678220002A40A /* VersionNegotiationIntegrationTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VersionNegotiationIntegrationTests.swift; sourceTree = "<group>"; };
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04AD0B532E2678220002A40A /* VersionNegotiationScenarioTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VersionNegotiationScenarioTests.swift; sourceTree = "<group>"; };
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04B6BA3D2E2035220090FE39 /* NoiseProtocolTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NoiseProtocolTests.swift; sourceTree = "<group>"; };
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04B6BA402E2035530090FE39 /* NoiseChannelEncryption.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NoiseChannelEncryption.swift; sourceTree = "<group>"; };
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04B6BA412E2035530090FE39 /* NoiseProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NoiseProtocol.swift; sourceTree = "<group>"; };
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@@ -324,6 +336,10 @@
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C3D98EB3E1B455E321F519F4 /* bitchatTests */ = {
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isa = PBXGroup;
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children = (
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04AD0B502E2678220002A40A /* BinaryProtocolVersionTests.swift */,
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04AD0B512E2678220002A40A /* ProtocolVersionNegotiationTests.swift */,
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04AD0B522E2678220002A40A /* VersionNegotiationIntegrationTests.swift */,
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04AD0B532E2678220002A40A /* VersionNegotiationScenarioTests.swift */,
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04B6BA5F2E21601B0090FE39 /* ChannelVerificationTests.swift */,
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04B6BA602E21601B0090FE39 /* KeychainIntegrationTests.swift */,
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04B6BA612E21601B0090FE39 /* NoiseChannelEncryptionTests.swift */,
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@@ -613,6 +629,10 @@
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buildActionMask = 2147483647;
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files = (
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8F0BFC2D2B2A5E7B70C3B485 /* BinaryProtocolTests.swift in Sources */,
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04AD0B582E2678220002A40A /* VersionNegotiationIntegrationTests.swift in Sources */,
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04AD0B592E2678220002A40A /* BinaryProtocolVersionTests.swift in Sources */,
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04AD0B5A2E2678220002A40A /* ProtocolVersionNegotiationTests.swift in Sources */,
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04AD0B5B2E2678220002A40A /* VersionNegotiationScenarioTests.swift in Sources */,
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04B6BA6F2E21601B0090FE39 /* ChannelVerificationTests.swift in Sources */,
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04B6BA702E21601B0090FE39 /* NoiseKeyRotationTests.swift in Sources */,
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04B6BA712E21601B0090FE39 /* NoiseRateLimiterTests.swift in Sources */,
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@@ -635,6 +655,10 @@
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buildActionMask = 2147483647;
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files = (
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CDAD6629EB69916B95C80DAF /* BinaryProtocolTests.swift in Sources */,
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04AD0B542E2678220002A40A /* VersionNegotiationIntegrationTests.swift in Sources */,
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04AD0B552E2678220002A40A /* BinaryProtocolVersionTests.swift in Sources */,
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04AD0B562E2678220002A40A /* ProtocolVersionNegotiationTests.swift in Sources */,
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04AD0B572E2678220002A40A /* VersionNegotiationScenarioTests.swift in Sources */,
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04B6BA672E21601B0090FE39 /* ChannelVerificationTests.swift in Sources */,
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04B6BA682E21601B0090FE39 /* NoiseKeyRotationTests.swift in Sources */,
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04B6BA692E21601B0090FE39 /* NoiseRateLimiterTests.swift in Sources */,
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@@ -150,8 +150,11 @@ struct BinaryProtocol {
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// Header
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let version = unpaddedData[offset]; offset += 1
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// Only support version 1
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guard version == 1 else { return nil }
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// Check if version is supported
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guard ProtocolVersion.isSupported(version) else {
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// Log unsupported version for debugging
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return nil
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}
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let type = unpaddedData[offset]; offset += 1
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let ttl = unpaddedData[offset]; offset += 1
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@@ -99,6 +99,10 @@ enum MessageType: UInt8 {
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case channelPasswordUpdate = 0x16 // Distribute new password to channel members
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case channelMetadata = 0x17 // Announce channel creator and metadata
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// Protocol version negotiation
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case versionHello = 0x20 // Initial version announcement
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case versionAck = 0x21 // Version acknowledgment
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var description: String {
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switch self {
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case .announce: return "announce"
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@@ -120,6 +124,8 @@ enum MessageType: UInt8 {
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case .channelKeyVerifyResponse: return "channelKeyVerifyResponse"
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case .channelPasswordUpdate: return "channelPasswordUpdate"
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case .channelMetadata: return "channelMetadata"
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case .versionHello: return "versionHello"
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case .versionAck: return "versionAck"
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}
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}
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}
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@@ -382,6 +388,92 @@ struct PeerIdentityBinding {
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}
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}
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// MARK: - Protocol Version Negotiation
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// Protocol version constants
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struct ProtocolVersion {
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static let current: UInt8 = 1
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static let minimum: UInt8 = 1
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static let maximum: UInt8 = 1
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// Future versions can be added here
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static let supportedVersions: Set<UInt8> = [1]
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static func isSupported(_ version: UInt8) -> Bool {
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return supportedVersions.contains(version)
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}
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static func negotiateVersion(clientVersions: [UInt8], serverVersions: [UInt8]) -> UInt8? {
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// Find the highest common version
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let clientSet = Set(clientVersions)
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let serverSet = Set(serverVersions)
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let common = clientSet.intersection(serverSet)
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return common.max()
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}
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}
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// Version negotiation hello message
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struct VersionHello: Codable {
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let supportedVersions: [UInt8] // List of supported protocol versions
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let preferredVersion: UInt8 // Preferred version (usually the latest)
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let clientVersion: String // App version string (e.g., "1.0.0")
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let platform: String // Platform identifier (e.g., "iOS", "macOS")
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let capabilities: [String]? // Optional capability flags for future extensions
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init(supportedVersions: [UInt8] = Array(ProtocolVersion.supportedVersions),
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preferredVersion: UInt8 = ProtocolVersion.current,
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clientVersion: String,
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platform: String,
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capabilities: [String]? = nil) {
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self.supportedVersions = supportedVersions
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self.preferredVersion = preferredVersion
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self.clientVersion = clientVersion
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self.platform = platform
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self.capabilities = capabilities
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}
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func encode() -> Data? {
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return try? JSONEncoder().encode(self)
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}
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static func decode(from data: Data) -> VersionHello? {
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try? JSONDecoder().decode(VersionHello.self, from: data)
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}
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}
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// Version negotiation acknowledgment
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struct VersionAck: Codable {
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let agreedVersion: UInt8 // The version both peers will use
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let serverVersion: String // Responder's app version
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let platform: String // Responder's platform
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let capabilities: [String]? // Responder's capabilities
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let rejected: Bool // True if no compatible version found
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let reason: String? // Reason for rejection if applicable
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init(agreedVersion: UInt8,
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serverVersion: String,
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platform: String,
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capabilities: [String]? = nil,
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rejected: Bool = false,
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reason: String? = nil) {
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self.agreedVersion = agreedVersion
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self.serverVersion = serverVersion
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self.platform = platform
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self.capabilities = capabilities
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self.rejected = rejected
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self.reason = reason
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}
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func encode() -> Data? {
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return try? JSONEncoder().encode(self)
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}
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static func decode(from data: Data) -> VersionAck? {
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try? JSONDecoder().decode(VersionAck.self, from: data)
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}
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}
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// Delivery status for messages
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enum DeliveryStatus: Codable, Equatable {
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case sending
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@@ -53,6 +53,14 @@ extension TimeInterval {
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}
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}
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// Version negotiation state
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enum VersionNegotiationState {
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case none
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case helloSent
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case ackReceived(version: UInt8)
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case failed(reason: String)
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}
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class BluetoothMeshService: NSObject {
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static let serviceUUID = CBUUID(string: "F47B5E2D-4A9E-4C5A-9B3F-8E1D2C3A4B5C")
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static let characteristicUUID = CBUUID(string: "A1B2C3D4-E5F6-4A5B-8C9D-0E1F2A3B4C5D")
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@@ -87,6 +95,10 @@ class BluetoothMeshService: NSObject {
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weak var delegate: BitchatDelegate?
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private let noiseService = NoiseEncryptionService()
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// Protocol version negotiation state
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private var versionNegotiationState: [String: VersionNegotiationState] = [:]
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private var negotiatedVersions: [String: UInt8] = [:] // peerID -> agreed version
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func getNoiseService() -> NoiseEncryptionService {
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return noiseService
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}
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@@ -2398,6 +2410,14 @@ class BluetoothMeshService: NSObject {
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return
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}
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if !isPeerIDOurs(senderID) {
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// Check if we've completed version negotiation with this peer
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if negotiatedVersions[senderID] == nil {
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// Legacy peer - assume version 1 for backward compatibility
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SecurityLogger.log("Received Noise handshake from \(senderID) without version negotiation, assuming v1",
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category: SecurityLogger.session, level: .debug)
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negotiatedVersions[senderID] = 1
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versionNegotiationState[senderID] = .ackReceived(version: 1)
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}
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handleNoiseHandshakeMessage(from: senderID, message: packet.payload, isInitiation: true)
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}
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@@ -2450,6 +2470,20 @@ class BluetoothMeshService: NSObject {
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handleChannelMetadata(from: senderID, data: packet.payload)
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}
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case .versionHello:
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// Handle version negotiation hello
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let senderID = packet.senderID.hexEncodedString()
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if !isPeerIDOurs(senderID) {
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handleVersionHello(from: senderID, data: packet.payload, peripheral: peripheral)
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}
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case .versionAck:
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// Handle version negotiation acknowledgment
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let senderID = packet.senderID.hexEncodedString()
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if !isPeerIDOurs(senderID) {
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handleVersionAck(from: senderID, data: packet.payload)
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}
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default:
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break
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}
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@@ -2860,6 +2894,11 @@ extension BluetoothMeshService: CBCentralManagerDelegate {
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// Clear cached messages tracking for this peer to allow re-sending if they reconnect
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cachedMessagesSentToPeer.remove(peerID)
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// Clear version negotiation state
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versionNegotiationState.removeValue(forKey: peerID)
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negotiatedVersions.removeValue(forKey: peerID)
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// Peer disconnected
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return (removed, peerNicknames[peerID])
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@@ -2920,10 +2959,10 @@ extension BluetoothMeshService: CBPeripheralDelegate {
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// iOS supports up to 512 bytes with BLE 5.0
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peripheral.maximumWriteValueLength(for: .withoutResponse)
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// Send Noise identity announcement once
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self.sendNoiseIdentityAnnounce()
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// Start version negotiation instead of immediately sending Noise identity
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self.sendVersionHello(to: peripheral)
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// Send announce packet after a short delay to avoid overwhelming the connection
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// Send announce packet after version negotiation completes
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// Send multiple times for reliability
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if let vm = self.delegate as? ChatViewModel {
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// Send announces multiple times with delays
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@@ -3574,6 +3613,140 @@ extension BluetoothMeshService: CBPeripheralManagerDelegate {
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}
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}
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// MARK: - Protocol Version Negotiation
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private func handleVersionHello(from peerID: String, data: Data, peripheral: CBPeripheral? = nil) {
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guard let hello = VersionHello.decode(from: data) else {
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SecurityLogger.log("Failed to decode version hello from \(peerID)", category: SecurityLogger.session, level: .error)
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return
|
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}
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||||
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SecurityLogger.log("Received version hello from \(peerID): supported versions \(hello.supportedVersions), preferred \(hello.preferredVersion)",
|
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category: SecurityLogger.session, level: .debug)
|
||||
|
||||
// Find the best common version
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let ourVersions = Array(ProtocolVersion.supportedVersions)
|
||||
if let agreedVersion = ProtocolVersion.negotiateVersion(clientVersions: hello.supportedVersions, serverVersions: ourVersions) {
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||||
// We can communicate! Send ACK
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negotiatedVersions[peerID] = agreedVersion
|
||||
versionNegotiationState[peerID] = .ackReceived(version: agreedVersion)
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||||
|
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let ack = VersionAck(
|
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agreedVersion: agreedVersion,
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serverVersion: Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "1.0",
|
||||
platform: getPlatformString()
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||||
)
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||||
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||||
sendVersionAck(ack, to: peerID)
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||||
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||||
// Proceed with Noise handshake after successful version negotiation
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||||
DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) { [weak self] in
|
||||
self?.sendNoiseIdentityAnnounce()
|
||||
self?.initiateNoiseHandshake(with: peerID)
|
||||
}
|
||||
} else {
|
||||
// No compatible version
|
||||
versionNegotiationState[peerID] = .failed(reason: "No compatible protocol version")
|
||||
|
||||
let ack = VersionAck(
|
||||
agreedVersion: 0,
|
||||
serverVersion: Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "1.0",
|
||||
platform: getPlatformString(),
|
||||
rejected: true,
|
||||
reason: "No compatible protocol version. Client supports: \(hello.supportedVersions), server supports: \(ourVersions)"
|
||||
)
|
||||
|
||||
sendVersionAck(ack, to: peerID)
|
||||
|
||||
// Disconnect after a short delay
|
||||
if let peripheral = peripheral {
|
||||
DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) { [weak self] in
|
||||
self?.centralManager?.cancelPeripheralConnection(peripheral)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private func handleVersionAck(from peerID: String, data: Data) {
|
||||
guard let ack = VersionAck.decode(from: data) else {
|
||||
SecurityLogger.log("Failed to decode version ack from \(peerID)", category: SecurityLogger.session, level: .error)
|
||||
return
|
||||
}
|
||||
|
||||
if ack.rejected {
|
||||
SecurityLogger.log("Version negotiation rejected by \(peerID): \(ack.reason ?? "Unknown reason")",
|
||||
category: SecurityLogger.session, level: .error)
|
||||
versionNegotiationState[peerID] = .failed(reason: ack.reason ?? "Version rejected")
|
||||
// TODO: Handle disconnection
|
||||
} else {
|
||||
SecurityLogger.log("Version negotiation successful with \(peerID): agreed on version \(ack.agreedVersion)",
|
||||
category: SecurityLogger.session, level: .debug)
|
||||
negotiatedVersions[peerID] = ack.agreedVersion
|
||||
versionNegotiationState[peerID] = .ackReceived(version: ack.agreedVersion)
|
||||
|
||||
// If we were the initiator (sent hello first), proceed with Noise handshake
|
||||
// Note: Since we're handling their ACK, they initiated, so we should not initiate again
|
||||
// The peer who sent hello will initiate the Noise handshake
|
||||
}
|
||||
}
|
||||
|
||||
private func sendVersionHello(to peripheral: CBPeripheral? = nil) {
|
||||
let hello = VersionHello(
|
||||
clientVersion: Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "1.0",
|
||||
platform: getPlatformString()
|
||||
)
|
||||
|
||||
guard let helloData = hello.encode() else { return }
|
||||
|
||||
let packet = BitchatPacket(
|
||||
type: MessageType.versionHello.rawValue,
|
||||
ttl: 1, // Version negotiation is direct, no relay
|
||||
senderID: myPeerID,
|
||||
payload: helloData
|
||||
)
|
||||
|
||||
// Mark that we initiated version negotiation
|
||||
// We don't know the peer ID yet from peripheral, so we'll track it when we get the response
|
||||
|
||||
if let peripheral = peripheral,
|
||||
let characteristic = peripheralCharacteristics[peripheral] {
|
||||
// Send directly to specific peripheral
|
||||
if let data = packet.toBinaryData() {
|
||||
let writeType: CBCharacteristicWriteType = characteristic.properties.contains(.write) ? .withResponse : .withoutResponse
|
||||
peripheral.writeValue(data, for: characteristic, type: writeType)
|
||||
}
|
||||
} else {
|
||||
// Broadcast to all
|
||||
broadcastPacket(packet)
|
||||
}
|
||||
}
|
||||
|
||||
private func sendVersionAck(_ ack: VersionAck, to peerID: String) {
|
||||
guard let ackData = ack.encode() else { return }
|
||||
|
||||
let packet = BitchatPacket(
|
||||
type: MessageType.versionAck.rawValue,
|
||||
senderID: Data(myPeerID.utf8),
|
||||
recipientID: Data(peerID.utf8),
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: ackData,
|
||||
signature: nil,
|
||||
ttl: 1 // Direct response, no relay
|
||||
)
|
||||
|
||||
broadcastPacket(packet)
|
||||
}
|
||||
|
||||
private func getPlatformString() -> String {
|
||||
#if os(iOS)
|
||||
return "iOS"
|
||||
#elseif os(macOS)
|
||||
return "macOS"
|
||||
#else
|
||||
return "Unknown"
|
||||
#endif
|
||||
}
|
||||
|
||||
func sendChannelKeyVerifyRequest(_ request: ChannelKeyVerifyRequest, to peers: [String]) {
|
||||
guard let requestData = request.encode() else { return }
|
||||
|
||||
|
||||
@@ -61,7 +61,7 @@ class ChatViewModel: ObservableObject {
|
||||
@Published var retentionEnabledChannels: Set<String> = [] // Channels where owner enabled retention for all members
|
||||
@Published var channelVerificationStatus: [String: ChannelVerificationStatus] = [:] // Track verification status
|
||||
|
||||
let meshService = BluetoothMeshService()
|
||||
var meshService = BluetoothMeshService()
|
||||
private let userDefaults = UserDefaults.standard
|
||||
private let nicknameKey = "bitchat.nickname"
|
||||
private let joinedChannelsKey = "bitchat.joinedChannels"
|
||||
@@ -959,13 +959,13 @@ class ChatViewModel: ObservableObject {
|
||||
}
|
||||
|
||||
// Compute SHA256 hash of the derived key for public verification
|
||||
private func computeKeyCommitment(for key: SymmetricKey) -> String {
|
||||
internal func computeKeyCommitment(for key: SymmetricKey) -> String {
|
||||
let keyData = key.withUnsafeBytes { Data($0) }
|
||||
let hash = SHA256.hash(data: keyData)
|
||||
return hash.compactMap { String(format: "%02x", $0) }.joined()
|
||||
}
|
||||
|
||||
private func deriveChannelKey(from password: String, channelName: String) -> SymmetricKey {
|
||||
internal func deriveChannelKey(from password: String, channelName: String) -> SymmetricKey {
|
||||
// Get creator fingerprint for this channel
|
||||
let creatorFingerprint = channelCreators[channelName]
|
||||
|
||||
|
||||
@@ -0,0 +1,230 @@
|
||||
//
|
||||
// BinaryProtocolVersionTests.swift
|
||||
// bitchatTests
|
||||
//
|
||||
// This is free and unencumbered software released into the public domain.
|
||||
// For more information, see <https://unlicense.org>
|
||||
//
|
||||
|
||||
import XCTest
|
||||
@testable import bitchat
|
||||
|
||||
class BinaryProtocolVersionTests: XCTestCase {
|
||||
|
||||
// MARK: - Version Support Tests
|
||||
|
||||
func testCurrentVersionIsSupported() {
|
||||
// Current version should always be supported
|
||||
XCTAssertTrue(ProtocolVersion.isSupported(ProtocolVersion.current))
|
||||
}
|
||||
|
||||
func testVersion1IsSupported() {
|
||||
// Version 1 must be supported for backward compatibility
|
||||
XCTAssertTrue(ProtocolVersion.isSupported(1))
|
||||
}
|
||||
|
||||
func testUnsupportedVersionsRejected() {
|
||||
// Test various unsupported versions
|
||||
XCTAssertFalse(ProtocolVersion.isSupported(0))
|
||||
XCTAssertFalse(ProtocolVersion.isSupported(2))
|
||||
XCTAssertFalse(ProtocolVersion.isSupported(99))
|
||||
XCTAssertFalse(ProtocolVersion.isSupported(255))
|
||||
}
|
||||
|
||||
// MARK: - Binary Protocol Version Handling
|
||||
|
||||
func testBinaryProtocolRejectsUnsupportedVersion() {
|
||||
// Create a packet with unsupported version
|
||||
var data = Data()
|
||||
|
||||
// Header
|
||||
data.append(99) // Unsupported version
|
||||
data.append(MessageType.message.rawValue)
|
||||
data.append(5) // TTL
|
||||
|
||||
// Timestamp (8 bytes)
|
||||
let timestamp = UInt64(Date().timeIntervalSince1970 * 1000)
|
||||
for i in (0..<8).reversed() {
|
||||
data.append(UInt8((timestamp >> (i * 8)) & 0xFF))
|
||||
}
|
||||
|
||||
// Flags (no recipient, no signature)
|
||||
data.append(0)
|
||||
|
||||
// Payload length (2 bytes)
|
||||
let payload = Data("test".utf8)
|
||||
let payloadLength = UInt16(payload.count)
|
||||
data.append(UInt8((payloadLength >> 8) & 0xFF))
|
||||
data.append(UInt8(payloadLength & 0xFF))
|
||||
|
||||
// SenderID (8 bytes)
|
||||
data.append(Data(repeating: 0x01, count: 8))
|
||||
|
||||
// Payload
|
||||
data.append(payload)
|
||||
|
||||
// Try to decode - should fail due to unsupported version
|
||||
let decoded = BinaryProtocol.decode(data)
|
||||
XCTAssertNil(decoded, "Should reject packet with unsupported version")
|
||||
}
|
||||
|
||||
func testBinaryProtocolAcceptsVersion1() {
|
||||
// Create a valid version 1 packet
|
||||
let packet = BitchatPacket(
|
||||
type: MessageType.message.rawValue,
|
||||
senderID: Data("sender12".utf8),
|
||||
recipientID: nil,
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: Data("Hello".utf8),
|
||||
signature: nil,
|
||||
ttl: 3
|
||||
)
|
||||
|
||||
// Encode
|
||||
guard let encoded = packet.toBinaryData() else {
|
||||
XCTFail("Failed to encode version 1 packet")
|
||||
return
|
||||
}
|
||||
|
||||
// Decode
|
||||
guard let decoded = BitchatPacket.from(encoded) else {
|
||||
XCTFail("Failed to decode version 1 packet")
|
||||
return
|
||||
}
|
||||
|
||||
XCTAssertEqual(decoded.version, 1)
|
||||
XCTAssertEqual(decoded.payload, Data("Hello".utf8))
|
||||
}
|
||||
|
||||
// MARK: - Version Message Type Tests
|
||||
|
||||
func testVersionHelloMessageType() {
|
||||
let hello = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: "iOS"
|
||||
)
|
||||
|
||||
guard let helloData = hello.encode() else {
|
||||
XCTFail("Failed to encode VersionHello")
|
||||
return
|
||||
}
|
||||
|
||||
let packet = BitchatPacket(
|
||||
type: MessageType.versionHello.rawValue,
|
||||
ttl: 1,
|
||||
senderID: "testpeer",
|
||||
payload: helloData
|
||||
)
|
||||
|
||||
XCTAssertEqual(packet.type, MessageType.versionHello.rawValue)
|
||||
XCTAssertEqual(MessageType.versionHello.description, "versionHello")
|
||||
}
|
||||
|
||||
func testVersionAckMessageType() {
|
||||
let ack = VersionAck(
|
||||
agreedVersion: 1,
|
||||
serverVersion: "1.0.0",
|
||||
platform: "macOS"
|
||||
)
|
||||
|
||||
guard let ackData = ack.encode() else {
|
||||
XCTFail("Failed to encode VersionAck")
|
||||
return
|
||||
}
|
||||
|
||||
let packet = BitchatPacket(
|
||||
type: MessageType.versionAck.rawValue,
|
||||
ttl: 1,
|
||||
senderID: "testpeer",
|
||||
payload: ackData
|
||||
)
|
||||
|
||||
XCTAssertEqual(packet.type, MessageType.versionAck.rawValue)
|
||||
XCTAssertEqual(MessageType.versionAck.description, "versionAck")
|
||||
}
|
||||
|
||||
// MARK: - Compression Compatibility Tests
|
||||
|
||||
func testCompressedPacketWithVersion() {
|
||||
// Create a large payload that will trigger compression
|
||||
let largeContent = String(repeating: "Hello World! ", count: 100)
|
||||
let packet = BitchatPacket(
|
||||
type: MessageType.message.rawValue,
|
||||
senderID: Data("sender12".utf8),
|
||||
recipientID: nil,
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: Data(largeContent.utf8),
|
||||
signature: nil,
|
||||
ttl: 3
|
||||
)
|
||||
|
||||
// Encode (should compress)
|
||||
guard let encoded = packet.toBinaryData() else {
|
||||
XCTFail("Failed to encode packet with compression")
|
||||
return
|
||||
}
|
||||
|
||||
// Decode
|
||||
guard let decoded = BitchatPacket.from(encoded) else {
|
||||
XCTFail("Failed to decode compressed packet")
|
||||
return
|
||||
}
|
||||
|
||||
// Verify version is preserved
|
||||
XCTAssertEqual(decoded.version, 1)
|
||||
XCTAssertEqual(decoded.payload, Data(largeContent.utf8))
|
||||
}
|
||||
|
||||
// MARK: - Future Version Migration Tests
|
||||
|
||||
func testVersionSetConsistency() {
|
||||
// Ensure version constants are consistent
|
||||
XCTAssertTrue(ProtocolVersion.supportedVersions.contains(ProtocolVersion.current))
|
||||
XCTAssertTrue(ProtocolVersion.supportedVersions.contains(ProtocolVersion.minimum))
|
||||
XCTAssertGreaterThanOrEqual(ProtocolVersion.current, ProtocolVersion.minimum)
|
||||
XCTAssertLessThanOrEqual(ProtocolVersion.current, ProtocolVersion.maximum)
|
||||
}
|
||||
|
||||
func testVersionNegotiationAlwaysPicksHighest() {
|
||||
// When multiple versions are supported, should pick highest
|
||||
let clientVersions: [UInt8] = [1, 2, 3, 4, 5]
|
||||
let serverVersions: [UInt8] = [3, 4, 5, 6, 7]
|
||||
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: clientVersions,
|
||||
serverVersions: serverVersions
|
||||
)
|
||||
|
||||
XCTAssertEqual(agreed, 5) // Highest common version
|
||||
}
|
||||
|
||||
// MARK: - Packet Size Tests with Version Negotiation
|
||||
|
||||
func testVersionNegotiationPacketsAreSmall() {
|
||||
// Version negotiation should use minimal bandwidth
|
||||
let hello = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: "iOS"
|
||||
)
|
||||
|
||||
guard let helloData = hello.encode() else {
|
||||
XCTFail("Failed to encode hello")
|
||||
return
|
||||
}
|
||||
|
||||
let packet = BitchatPacket(
|
||||
type: MessageType.versionHello.rawValue,
|
||||
ttl: 1,
|
||||
senderID: "12345678",
|
||||
payload: helloData
|
||||
)
|
||||
|
||||
guard let encoded = packet.toBinaryData() else {
|
||||
XCTFail("Failed to encode packet")
|
||||
return
|
||||
}
|
||||
|
||||
// Version negotiation packets should be reasonably small
|
||||
XCTAssertLessThan(encoded.count, 512, "Version negotiation packet too large")
|
||||
}
|
||||
}
|
||||
@@ -167,6 +167,7 @@ class ChannelVerificationTests: XCTestCase {
|
||||
let update = ChannelPasswordUpdate(
|
||||
channel: channel,
|
||||
ownerID: ownerID,
|
||||
ownerFingerprint: "test-fingerprint", // Mock fingerprint
|
||||
encryptedPassword: Data(), // Would be encrypted in real scenario
|
||||
newKeyCommitment: newCommitment
|
||||
)
|
||||
@@ -191,9 +192,12 @@ class MockBluetoothMeshService: BluetoothMeshService {
|
||||
var mockNoiseSessionEstablished = false
|
||||
var mockDecryptedPassword: String?
|
||||
|
||||
override func sendChannelKeyVerifyResponse(_ response: ChannelKeyVerifyResponse, to peerID: String) {
|
||||
// Mock the method without override since it's not overrideable
|
||||
func mockSendChannelKeyVerifyResponse(_ response: ChannelKeyVerifyResponse, to peerID: String) {
|
||||
sentVerifyResponse = true
|
||||
lastVerifyResponse = response
|
||||
// Call the real method if needed
|
||||
super.sendChannelKeyVerifyResponse(response, to: peerID)
|
||||
}
|
||||
|
||||
override func getNoiseService() -> NoiseEncryptionService {
|
||||
|
||||
@@ -0,0 +1,357 @@
|
||||
//
|
||||
// ProtocolVersionNegotiationTests.swift
|
||||
// bitchatTests
|
||||
//
|
||||
// This is free and unencumbered software released into the public domain.
|
||||
// For more information, see <https://unlicense.org>
|
||||
//
|
||||
|
||||
import XCTest
|
||||
@testable import bitchat
|
||||
|
||||
class ProtocolVersionNegotiationTests: XCTestCase {
|
||||
|
||||
// MARK: - VersionHello Tests
|
||||
|
||||
func testVersionHelloEncodingDecoding() {
|
||||
let hello = VersionHello(
|
||||
supportedVersions: [1, 2, 3],
|
||||
preferredVersion: 3,
|
||||
clientVersion: "1.2.3",
|
||||
platform: "iOS",
|
||||
capabilities: ["noise", "compression"]
|
||||
)
|
||||
|
||||
// Encode
|
||||
guard let encoded = hello.encode() else {
|
||||
XCTFail("Failed to encode VersionHello")
|
||||
return
|
||||
}
|
||||
|
||||
// Decode
|
||||
guard let decoded = VersionHello.decode(from: encoded) else {
|
||||
XCTFail("Failed to decode VersionHello")
|
||||
return
|
||||
}
|
||||
|
||||
// Verify
|
||||
XCTAssertEqual(decoded.supportedVersions, hello.supportedVersions)
|
||||
XCTAssertEqual(decoded.preferredVersion, hello.preferredVersion)
|
||||
XCTAssertEqual(decoded.clientVersion, hello.clientVersion)
|
||||
XCTAssertEqual(decoded.platform, hello.platform)
|
||||
XCTAssertEqual(decoded.capabilities, hello.capabilities)
|
||||
}
|
||||
|
||||
func testVersionHelloDefaults() {
|
||||
let hello = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: "macOS"
|
||||
)
|
||||
|
||||
XCTAssertEqual(hello.supportedVersions, Array(ProtocolVersion.supportedVersions))
|
||||
XCTAssertEqual(hello.preferredVersion, ProtocolVersion.current)
|
||||
XCTAssertNil(hello.capabilities)
|
||||
}
|
||||
|
||||
// MARK: - VersionAck Tests
|
||||
|
||||
func testVersionAckEncodingDecoding() {
|
||||
let ack = VersionAck(
|
||||
agreedVersion: 2,
|
||||
serverVersion: "1.1.0",
|
||||
platform: "iOS",
|
||||
capabilities: ["noise"],
|
||||
rejected: false,
|
||||
reason: nil
|
||||
)
|
||||
|
||||
// Encode
|
||||
guard let encoded = ack.encode() else {
|
||||
XCTFail("Failed to encode VersionAck")
|
||||
return
|
||||
}
|
||||
|
||||
// Decode
|
||||
guard let decoded = VersionAck.decode(from: encoded) else {
|
||||
XCTFail("Failed to decode VersionAck")
|
||||
return
|
||||
}
|
||||
|
||||
// Verify
|
||||
XCTAssertEqual(decoded.agreedVersion, ack.agreedVersion)
|
||||
XCTAssertEqual(decoded.serverVersion, ack.serverVersion)
|
||||
XCTAssertEqual(decoded.platform, ack.platform)
|
||||
XCTAssertEqual(decoded.capabilities, ack.capabilities)
|
||||
XCTAssertEqual(decoded.rejected, ack.rejected)
|
||||
XCTAssertNil(decoded.reason)
|
||||
}
|
||||
|
||||
func testVersionAckRejection() {
|
||||
let ack = VersionAck(
|
||||
agreedVersion: 0,
|
||||
serverVersion: "2.0.0",
|
||||
platform: "macOS",
|
||||
rejected: true,
|
||||
reason: "No compatible version found"
|
||||
)
|
||||
|
||||
guard let encoded = ack.encode(),
|
||||
let decoded = VersionAck.decode(from: encoded) else {
|
||||
XCTFail("Failed to encode/decode rejection VersionAck")
|
||||
return
|
||||
}
|
||||
|
||||
XCTAssertTrue(decoded.rejected)
|
||||
XCTAssertEqual(decoded.reason, "No compatible version found")
|
||||
XCTAssertEqual(decoded.agreedVersion, 0)
|
||||
}
|
||||
|
||||
// MARK: - ProtocolVersion Tests
|
||||
|
||||
func testIsSupported() {
|
||||
XCTAssertTrue(ProtocolVersion.isSupported(1))
|
||||
XCTAssertFalse(ProtocolVersion.isSupported(99))
|
||||
XCTAssertFalse(ProtocolVersion.isSupported(0))
|
||||
}
|
||||
|
||||
func testVersionNegotiation() {
|
||||
// Test successful negotiation
|
||||
let clientVersions: [UInt8] = [1, 2, 3]
|
||||
let serverVersions: [UInt8] = [1, 3, 4]
|
||||
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: clientVersions,
|
||||
serverVersions: serverVersions
|
||||
)
|
||||
|
||||
XCTAssertEqual(agreed, 3) // Should pick highest common version
|
||||
}
|
||||
|
||||
func testVersionNegotiationNoCommon() {
|
||||
// Test no common version
|
||||
let clientVersions: [UInt8] = [2, 3]
|
||||
let serverVersions: [UInt8] = [4, 5]
|
||||
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: clientVersions,
|
||||
serverVersions: serverVersions
|
||||
)
|
||||
|
||||
XCTAssertNil(agreed)
|
||||
}
|
||||
|
||||
func testVersionNegotiationSingleCommon() {
|
||||
// Test single common version
|
||||
let clientVersions: [UInt8] = [1]
|
||||
let serverVersions: [UInt8] = [1, 2, 3]
|
||||
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: clientVersions,
|
||||
serverVersions: serverVersions
|
||||
)
|
||||
|
||||
XCTAssertEqual(agreed, 1)
|
||||
}
|
||||
|
||||
func testVersionNegotiationEmpty() {
|
||||
// Test empty version lists
|
||||
let agreed1 = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: [],
|
||||
serverVersions: [1, 2]
|
||||
)
|
||||
XCTAssertNil(agreed1)
|
||||
|
||||
let agreed2 = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: [1, 2],
|
||||
serverVersions: []
|
||||
)
|
||||
XCTAssertNil(agreed2)
|
||||
}
|
||||
|
||||
// MARK: - Binary Protocol Integration Tests
|
||||
|
||||
func testVersionHelloPacketEncoding() {
|
||||
let hello = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: "iOS"
|
||||
)
|
||||
|
||||
guard let helloData = hello.encode() else {
|
||||
XCTFail("Failed to encode VersionHello")
|
||||
return
|
||||
}
|
||||
|
||||
let packet = BitchatPacket(
|
||||
type: MessageType.versionHello.rawValue,
|
||||
ttl: 1,
|
||||
senderID: "testpeer",
|
||||
payload: helloData
|
||||
)
|
||||
|
||||
guard let encoded = packet.toBinaryData() else {
|
||||
XCTFail("Failed to encode packet")
|
||||
return
|
||||
}
|
||||
|
||||
guard let decoded = BitchatPacket.from(encoded) else {
|
||||
XCTFail("Failed to decode packet")
|
||||
return
|
||||
}
|
||||
|
||||
XCTAssertEqual(decoded.type, MessageType.versionHello.rawValue)
|
||||
XCTAssertEqual(decoded.ttl, 1)
|
||||
|
||||
// Verify payload can be decoded back to VersionHello
|
||||
guard let decodedHello = VersionHello.decode(from: decoded.payload) else {
|
||||
XCTFail("Failed to decode VersionHello from packet payload")
|
||||
return
|
||||
}
|
||||
|
||||
XCTAssertEqual(decodedHello.clientVersion, "1.0.0")
|
||||
XCTAssertEqual(decodedHello.platform, "iOS")
|
||||
}
|
||||
|
||||
func testVersionAckPacketEncoding() {
|
||||
let ack = VersionAck(
|
||||
agreedVersion: 1,
|
||||
serverVersion: "1.0.0",
|
||||
platform: "macOS"
|
||||
)
|
||||
|
||||
guard let ackData = ack.encode() else {
|
||||
XCTFail("Failed to encode VersionAck")
|
||||
return
|
||||
}
|
||||
|
||||
let packet = BitchatPacket(
|
||||
type: MessageType.versionAck.rawValue,
|
||||
senderID: Data("sender".utf8),
|
||||
recipientID: Data("recipient".utf8),
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: ackData,
|
||||
signature: nil,
|
||||
ttl: 1
|
||||
)
|
||||
|
||||
guard let encoded = packet.toBinaryData() else {
|
||||
XCTFail("Failed to encode packet")
|
||||
return
|
||||
}
|
||||
|
||||
guard let decoded = BitchatPacket.from(encoded) else {
|
||||
XCTFail("Failed to decode packet")
|
||||
return
|
||||
}
|
||||
|
||||
XCTAssertEqual(decoded.type, MessageType.versionAck.rawValue)
|
||||
|
||||
// Verify payload can be decoded back to VersionAck
|
||||
guard let decodedAck = VersionAck.decode(from: decoded.payload) else {
|
||||
XCTFail("Failed to decode VersionAck from packet payload")
|
||||
return
|
||||
}
|
||||
|
||||
XCTAssertEqual(decodedAck.agreedVersion, 1)
|
||||
XCTAssertEqual(decodedAck.serverVersion, "1.0.0")
|
||||
XCTAssertEqual(decodedAck.platform, "macOS")
|
||||
}
|
||||
|
||||
// MARK: - Version State Management Tests
|
||||
|
||||
func testVersionNegotiationStateTransitions() {
|
||||
var state = VersionNegotiationState.none
|
||||
|
||||
// Test transition to helloSent
|
||||
state = .helloSent
|
||||
if case .helloSent = state {
|
||||
// Success
|
||||
} else {
|
||||
XCTFail("State should be helloSent")
|
||||
}
|
||||
|
||||
// Test transition to ackReceived
|
||||
state = .ackReceived(version: 2)
|
||||
if case .ackReceived(let version) = state {
|
||||
XCTAssertEqual(version, 2)
|
||||
} else {
|
||||
XCTFail("State should be ackReceived")
|
||||
}
|
||||
|
||||
// Test transition to failed
|
||||
state = .failed(reason: "Version mismatch")
|
||||
if case .failed(let reason) = state {
|
||||
XCTAssertEqual(reason, "Version mismatch")
|
||||
} else {
|
||||
XCTFail("State should be failed")
|
||||
}
|
||||
}
|
||||
|
||||
// MARK: - Edge Cases
|
||||
|
||||
func testLargeVersionNumbers() {
|
||||
let hello = VersionHello(
|
||||
supportedVersions: [1, 127, 255],
|
||||
preferredVersion: 255,
|
||||
clientVersion: "99.99.99",
|
||||
platform: "iOS"
|
||||
)
|
||||
|
||||
guard let encoded = hello.encode(),
|
||||
let decoded = VersionHello.decode(from: encoded) else {
|
||||
XCTFail("Failed to encode/decode with large version numbers")
|
||||
return
|
||||
}
|
||||
|
||||
XCTAssertEqual(decoded.supportedVersions, [1, 127, 255])
|
||||
XCTAssertEqual(decoded.preferredVersion, 255)
|
||||
}
|
||||
|
||||
func testEmptyCapabilities() {
|
||||
let hello = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: "iOS",
|
||||
capabilities: []
|
||||
)
|
||||
|
||||
guard let encoded = hello.encode(),
|
||||
let decoded = VersionHello.decode(from: encoded) else {
|
||||
XCTFail("Failed to encode/decode with empty capabilities")
|
||||
return
|
||||
}
|
||||
|
||||
XCTAssertEqual(decoded.capabilities, [])
|
||||
}
|
||||
|
||||
func testLongCapabilityStrings() {
|
||||
let longCapability = String(repeating: "a", count: 1000)
|
||||
let hello = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: "iOS",
|
||||
capabilities: [longCapability, "normal"]
|
||||
)
|
||||
|
||||
guard let encoded = hello.encode(),
|
||||
let decoded = VersionHello.decode(from: encoded) else {
|
||||
XCTFail("Failed to encode/decode with long capability strings")
|
||||
return
|
||||
}
|
||||
|
||||
XCTAssertEqual(decoded.capabilities?.count, 2)
|
||||
XCTAssertEqual(decoded.capabilities?[0], longCapability)
|
||||
XCTAssertEqual(decoded.capabilities?[1], "normal")
|
||||
}
|
||||
|
||||
func testInvalidJSON() {
|
||||
let invalidData = Data("not json".utf8)
|
||||
|
||||
XCTAssertNil(VersionHello.decode(from: invalidData))
|
||||
XCTAssertNil(VersionAck.decode(from: invalidData))
|
||||
}
|
||||
|
||||
func testEmptyData() {
|
||||
let emptyData = Data()
|
||||
|
||||
XCTAssertNil(VersionHello.decode(from: emptyData))
|
||||
XCTAssertNil(VersionAck.decode(from: emptyData))
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,323 @@
|
||||
//
|
||||
// VersionNegotiationIntegrationTests.swift
|
||||
// bitchatTests
|
||||
//
|
||||
// This is free and unencumbered software released into the public domain.
|
||||
// For more information, see <https://unlicense.org>
|
||||
//
|
||||
|
||||
import XCTest
|
||||
import CoreBluetooth
|
||||
@testable import bitchat
|
||||
|
||||
class VersionNegotiationIntegrationTests: XCTestCase {
|
||||
|
||||
var meshService: BluetoothMeshService!
|
||||
var mockDelegate: MockBitchatDelegate!
|
||||
|
||||
override func setUp() {
|
||||
super.setUp()
|
||||
meshService = BluetoothMeshService()
|
||||
mockDelegate = MockBitchatDelegate()
|
||||
meshService.delegate = mockDelegate
|
||||
}
|
||||
|
||||
override func tearDown() {
|
||||
meshService = nil
|
||||
mockDelegate = nil
|
||||
super.tearDown()
|
||||
}
|
||||
|
||||
// MARK: - Version Negotiation Flow Tests
|
||||
|
||||
func testVersionNegotiationSuccessFlow() {
|
||||
let peerID = "testpeer12345678"
|
||||
|
||||
// Simulate receiving version hello
|
||||
let hello = VersionHello(
|
||||
supportedVersions: [1],
|
||||
preferredVersion: 1,
|
||||
clientVersion: "1.0.0",
|
||||
platform: "iOS"
|
||||
)
|
||||
|
||||
guard let helloData = hello.encode() else {
|
||||
XCTFail("Failed to encode hello")
|
||||
return
|
||||
}
|
||||
|
||||
let helloPacket = BitchatPacket(
|
||||
type: MessageType.versionHello.rawValue,
|
||||
senderID: Data(hexString: peerID) ?? Data(),
|
||||
recipientID: nil,
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: helloData,
|
||||
signature: nil,
|
||||
ttl: 1
|
||||
)
|
||||
|
||||
// Process the hello packet
|
||||
meshService.handleReceivedPacket(helloPacket, from: peerID, peripheral: nil)
|
||||
|
||||
// Verify that version was negotiated
|
||||
// Note: We'd need to expose negotiatedVersions or add a getter to properly test this
|
||||
// For now, we're testing that the packet is processed without errors
|
||||
|
||||
// The service should have sent a version ack
|
||||
// In a real test, we'd mock the broadcast mechanism to verify this
|
||||
}
|
||||
|
||||
func testVersionNegotiationRejectionFlow() {
|
||||
let peerID = "incompatiblepeer"
|
||||
|
||||
// Simulate receiving version hello with incompatible version
|
||||
let hello = VersionHello(
|
||||
supportedVersions: [99, 100], // Unsupported versions
|
||||
preferredVersion: 100,
|
||||
clientVersion: "99.0.0",
|
||||
platform: "Unknown"
|
||||
)
|
||||
|
||||
guard let helloData = hello.encode() else {
|
||||
XCTFail("Failed to encode hello")
|
||||
return
|
||||
}
|
||||
|
||||
let helloPacket = BitchatPacket(
|
||||
type: MessageType.versionHello.rawValue,
|
||||
senderID: Data(hexString: peerID) ?? Data(),
|
||||
recipientID: nil,
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: helloData,
|
||||
signature: nil,
|
||||
ttl: 1
|
||||
)
|
||||
|
||||
// Process the hello packet
|
||||
meshService.handleReceivedPacket(helloPacket, from: peerID, peripheral: nil)
|
||||
|
||||
// The service should send a rejection ack
|
||||
// In a real implementation, we'd verify the rejection was sent
|
||||
}
|
||||
|
||||
func testBackwardCompatibilityWithLegacyPeer() {
|
||||
let peerID = "legacypeer123456"
|
||||
|
||||
// Simulate receiving a Noise handshake init without prior version negotiation
|
||||
let handshakePacket = BitchatPacket(
|
||||
type: MessageType.noiseHandshakeInit.rawValue,
|
||||
senderID: Data(hexString: peerID) ?? Data(),
|
||||
recipientID: nil,
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: Data("handshake_data".utf8),
|
||||
signature: nil,
|
||||
ttl: 3
|
||||
)
|
||||
|
||||
// Process the handshake packet
|
||||
meshService.handleReceivedPacket(handshakePacket, from: peerID, peripheral: nil)
|
||||
|
||||
// Should assume version 1 for backward compatibility
|
||||
// The handshake should proceed normally
|
||||
}
|
||||
|
||||
func testVersionAckHandling() {
|
||||
let peerID = "ackpeer12345678"
|
||||
|
||||
// Simulate receiving version ack
|
||||
let ack = VersionAck(
|
||||
agreedVersion: 1,
|
||||
serverVersion: "1.0.0",
|
||||
platform: "macOS"
|
||||
)
|
||||
|
||||
guard let ackData = ack.encode() else {
|
||||
XCTFail("Failed to encode ack")
|
||||
return
|
||||
}
|
||||
|
||||
let ackPacket = BitchatPacket(
|
||||
type: MessageType.versionAck.rawValue,
|
||||
senderID: Data(hexString: peerID) ?? Data(),
|
||||
recipientID: meshService.getMyPeerID().data(using: .utf8),
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: ackData,
|
||||
signature: nil,
|
||||
ttl: 1
|
||||
)
|
||||
|
||||
// Process the ack packet
|
||||
meshService.handleReceivedPacket(ackPacket, from: peerID, peripheral: nil)
|
||||
|
||||
// Should update negotiated version and proceed with handshake
|
||||
}
|
||||
|
||||
func testVersionAckRejectionHandling() {
|
||||
let peerID = "rejectpeer123456"
|
||||
|
||||
// Simulate receiving rejection ack
|
||||
let ack = VersionAck(
|
||||
agreedVersion: 0,
|
||||
serverVersion: "2.0.0",
|
||||
platform: "iOS",
|
||||
rejected: true,
|
||||
reason: "No compatible protocol version"
|
||||
)
|
||||
|
||||
guard let ackData = ack.encode() else {
|
||||
XCTFail("Failed to encode rejection ack")
|
||||
return
|
||||
}
|
||||
|
||||
let ackPacket = BitchatPacket(
|
||||
type: MessageType.versionAck.rawValue,
|
||||
senderID: Data(hexString: peerID) ?? Data(),
|
||||
recipientID: meshService.getMyPeerID().data(using: .utf8),
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: ackData,
|
||||
signature: nil,
|
||||
ttl: 1
|
||||
)
|
||||
|
||||
// Process the rejection ack
|
||||
meshService.handleReceivedPacket(ackPacket, from: peerID, peripheral: nil)
|
||||
|
||||
// Should mark negotiation as failed
|
||||
}
|
||||
|
||||
// MARK: - State Management Tests
|
||||
|
||||
func testVersionStateCleanupOnDisconnect() {
|
||||
let peerID = "disconnectpeer12"
|
||||
|
||||
// First establish some version negotiation state
|
||||
let hello = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: "iOS"
|
||||
)
|
||||
|
||||
guard let helloData = hello.encode() else {
|
||||
XCTFail("Failed to encode hello")
|
||||
return
|
||||
}
|
||||
|
||||
let helloPacket = BitchatPacket(
|
||||
type: MessageType.versionHello.rawValue,
|
||||
senderID: Data(hexString: peerID) ?? Data(),
|
||||
recipientID: nil,
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: helloData,
|
||||
signature: nil,
|
||||
ttl: 1
|
||||
)
|
||||
|
||||
// Process hello to establish state
|
||||
meshService.handleReceivedPacket(helloPacket, from: peerID, peripheral: nil)
|
||||
|
||||
// Simulate disconnect
|
||||
// In real implementation, we'd trigger the disconnect logic
|
||||
// and verify state is cleaned up
|
||||
}
|
||||
|
||||
// MARK: - Error Handling Tests
|
||||
|
||||
func testMalformedVersionHello() {
|
||||
let peerID = "malformedpeer123"
|
||||
|
||||
// Send malformed data
|
||||
let malformedPacket = BitchatPacket(
|
||||
type: MessageType.versionHello.rawValue,
|
||||
senderID: Data(hexString: peerID) ?? Data(),
|
||||
recipientID: nil,
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: Data("not valid json".utf8),
|
||||
signature: nil,
|
||||
ttl: 1
|
||||
)
|
||||
|
||||
// Should handle gracefully without crashing
|
||||
meshService.handleReceivedPacket(malformedPacket, from: peerID, peripheral: nil)
|
||||
}
|
||||
|
||||
func testMalformedVersionAck() {
|
||||
let peerID = "malformedackpeer"
|
||||
|
||||
// Send malformed ack data
|
||||
let malformedPacket = BitchatPacket(
|
||||
type: MessageType.versionAck.rawValue,
|
||||
senderID: Data(hexString: peerID) ?? Data(),
|
||||
recipientID: meshService.getMyPeerID().data(using: .utf8),
|
||||
timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
|
||||
payload: Data("{invalid json}".utf8),
|
||||
signature: nil,
|
||||
ttl: 1
|
||||
)
|
||||
|
||||
// Should handle gracefully without crashing
|
||||
meshService.handleReceivedPacket(malformedPacket, from: peerID, peripheral: nil)
|
||||
}
|
||||
|
||||
// MARK: - Performance Tests
|
||||
|
||||
func testVersionNegotiationPerformance() {
|
||||
measure {
|
||||
// Test encoding/decoding performance
|
||||
for i in 0..<1000 {
|
||||
let hello = VersionHello(
|
||||
supportedVersions: [1, 2, 3],
|
||||
preferredVersion: 3,
|
||||
clientVersion: "1.\(i).0",
|
||||
platform: "iOS",
|
||||
capabilities: ["cap1", "cap2", "cap3"]
|
||||
)
|
||||
|
||||
if let data = hello.encode(),
|
||||
let _ = VersionHello.decode(from: data) {
|
||||
// Success
|
||||
} else {
|
||||
XCTFail("Failed at iteration \(i)")
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// MARK: - Mock Delegate
|
||||
|
||||
class MockBitchatDelegate: BitchatDelegate {
|
||||
var receivedMessages: [BitchatMessage] = []
|
||||
var connectedPeers: [String] = []
|
||||
var disconnectedPeers: [String] = []
|
||||
|
||||
func didReceiveMessage(_ message: BitchatMessage) {
|
||||
receivedMessages.append(message)
|
||||
}
|
||||
|
||||
func didConnectToPeer(_ peerID: String) {
|
||||
connectedPeers.append(peerID)
|
||||
}
|
||||
|
||||
func didDisconnectFromPeer(_ peerID: String) {
|
||||
disconnectedPeers.append(peerID)
|
||||
}
|
||||
|
||||
func didUpdatePeerList(_ peers: [String]) {
|
||||
// Not used in these tests
|
||||
}
|
||||
|
||||
func didReceiveChannelLeave(_ channel: String, from peerID: String) {
|
||||
// Not used in these tests
|
||||
}
|
||||
|
||||
func didReceivePasswordProtectedChannelAnnouncement(_ channel: String, isProtected: Bool, creatorID: String?, keyCommitment: String?) {
|
||||
// Not used in these tests
|
||||
}
|
||||
|
||||
func didReceiveChannelRetentionAnnouncement(_ channel: String, enabled: Bool, creatorID: String?) {
|
||||
// Not used in these tests
|
||||
}
|
||||
|
||||
func decryptChannelMessage(_ encryptedContent: Data, channel: String) -> String? {
|
||||
return nil
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,297 @@
|
||||
//
|
||||
// VersionNegotiationScenarioTests.swift
|
||||
// bitchatTests
|
||||
//
|
||||
// This is free and unencumbered software released into the public domain.
|
||||
// For more information, see <https://unlicense.org>
|
||||
//
|
||||
|
||||
import XCTest
|
||||
@testable import bitchat
|
||||
|
||||
class VersionNegotiationScenarioTests: XCTestCase {
|
||||
|
||||
// MARK: - Real-World Scenarios
|
||||
|
||||
func testOldClientConnectsToNewServer() {
|
||||
// Scenario: Old client (v1 only) connects to new server (v1, v2, v3)
|
||||
let oldClientVersions: [UInt8] = [1]
|
||||
let newServerVersions: [UInt8] = [1, 2, 3]
|
||||
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: oldClientVersions,
|
||||
serverVersions: newServerVersions
|
||||
)
|
||||
|
||||
XCTAssertEqual(agreed, 1, "Should agree on v1 for backward compatibility")
|
||||
}
|
||||
|
||||
func testNewClientConnectsToOldServer() {
|
||||
// Scenario: New client (v1, v2, v3) connects to old server (v1 only)
|
||||
let newClientVersions: [UInt8] = [1, 2, 3]
|
||||
let oldServerVersions: [UInt8] = [1]
|
||||
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: newClientVersions,
|
||||
serverVersions: oldServerVersions
|
||||
)
|
||||
|
||||
XCTAssertEqual(agreed, 1, "Should agree on v1 for backward compatibility")
|
||||
}
|
||||
|
||||
func testMixedVersionNetwork() {
|
||||
// Scenario: Network with mixed client versions
|
||||
let clients = [
|
||||
[1], // Old client
|
||||
[1, 2], // Mid-version client
|
||||
[1, 2, 3] // New client
|
||||
]
|
||||
|
||||
// All should be able to negotiate with each other
|
||||
for (i, client1) in clients.enumerated() {
|
||||
for (j, client2) in clients.enumerated() {
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: client1,
|
||||
serverVersions: client2
|
||||
)
|
||||
|
||||
XCTAssertNotNil(agreed, "Clients \(i) and \(j) should negotiate successfully")
|
||||
XCTAssertGreaterThanOrEqual(agreed ?? 0, 1, "Should at least agree on v1")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func testFutureClientWithUnsupportedVersion() {
|
||||
// Scenario: Future client with only unsupported versions
|
||||
let futureClientVersions: [UInt8] = [10, 11, 12]
|
||||
let currentServerVersions: [UInt8] = Array(ProtocolVersion.supportedVersions)
|
||||
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: futureClientVersions,
|
||||
serverVersions: currentServerVersions
|
||||
)
|
||||
|
||||
XCTAssertNil(agreed, "Should fail to negotiate with incompatible future client")
|
||||
}
|
||||
|
||||
// MARK: - Race Condition Tests
|
||||
|
||||
func testSimultaneousVersionHello() {
|
||||
// Scenario: Both peers send version hello at the same time
|
||||
// This tests that the protocol handles simultaneous negotiation
|
||||
|
||||
let hello1 = VersionHello(
|
||||
supportedVersions: [1, 2],
|
||||
preferredVersion: 2,
|
||||
clientVersion: "1.1.0",
|
||||
platform: "iOS"
|
||||
)
|
||||
|
||||
let hello2 = VersionHello(
|
||||
supportedVersions: [1, 2, 3],
|
||||
preferredVersion: 3,
|
||||
clientVersion: "1.2.0",
|
||||
platform: "macOS"
|
||||
)
|
||||
|
||||
// Both should be able to encode/decode regardless of order
|
||||
XCTAssertNotNil(hello1.encode())
|
||||
XCTAssertNotNil(hello2.encode())
|
||||
|
||||
// Version negotiation should be deterministic
|
||||
let agreed1 = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: hello1.supportedVersions,
|
||||
serverVersions: hello2.supportedVersions
|
||||
)
|
||||
|
||||
let agreed2 = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: hello2.supportedVersions,
|
||||
serverVersions: hello1.supportedVersions
|
||||
)
|
||||
|
||||
XCTAssertEqual(agreed1, agreed2, "Negotiation should be symmetric")
|
||||
XCTAssertEqual(agreed1, 2, "Should agree on highest common version")
|
||||
}
|
||||
|
||||
// MARK: - Error Recovery Tests
|
||||
|
||||
func testRecoveryFromFailedNegotiation() {
|
||||
// Test that a peer can retry after failed negotiation
|
||||
var state = VersionNegotiationState.failed(reason: "Network error")
|
||||
|
||||
// Reset state for retry
|
||||
state = .none
|
||||
|
||||
// Should be able to start new negotiation
|
||||
state = .helloSent
|
||||
|
||||
if case .helloSent = state {
|
||||
// Success - can retry after failure
|
||||
} else {
|
||||
XCTFail("Should be able to retry after failed negotiation")
|
||||
}
|
||||
}
|
||||
|
||||
func testPartialMessageHandling() {
|
||||
// Test handling of truncated version messages
|
||||
let truncatedData = Data([123, 34]) // Partial JSON
|
||||
|
||||
XCTAssertNil(VersionHello.decode(from: truncatedData))
|
||||
XCTAssertNil(VersionAck.decode(from: truncatedData))
|
||||
|
||||
// Should not crash, just return nil
|
||||
}
|
||||
|
||||
// MARK: - Platform Compatibility Tests
|
||||
|
||||
func testCrossPlatformNegotiation() {
|
||||
let platforms = ["iOS", "macOS", "iPadOS", "Unknown"]
|
||||
|
||||
for platform1 in platforms {
|
||||
for platform2 in platforms {
|
||||
let hello1 = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: platform1
|
||||
)
|
||||
|
||||
let hello2 = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: platform2
|
||||
)
|
||||
|
||||
// All platforms should be able to negotiate
|
||||
XCTAssertNotNil(hello1.encode())
|
||||
XCTAssertNotNil(hello2.encode())
|
||||
|
||||
// Platform difference should not affect version negotiation
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: hello1.supportedVersions,
|
||||
serverVersions: hello2.supportedVersions
|
||||
)
|
||||
|
||||
XCTAssertNotNil(agreed, "\(platform1) and \(platform2) should negotiate")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// MARK: - Capability Tests
|
||||
|
||||
func testCapabilityNegotiation() {
|
||||
// Test future capability negotiation
|
||||
let clientCapabilities = ["noise", "compression", "multipath"]
|
||||
let serverCapabilities = ["noise", "compression", "federation"]
|
||||
|
||||
let hello = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: "iOS",
|
||||
capabilities: clientCapabilities
|
||||
)
|
||||
|
||||
let ack = VersionAck(
|
||||
agreedVersion: 1,
|
||||
serverVersion: "1.0.0",
|
||||
platform: "macOS",
|
||||
capabilities: serverCapabilities
|
||||
)
|
||||
|
||||
// Find common capabilities (for future use)
|
||||
let commonCapabilities = Set(clientCapabilities).intersection(Set(serverCapabilities))
|
||||
XCTAssertEqual(commonCapabilities, ["noise", "compression"])
|
||||
}
|
||||
|
||||
func testEmptyCapabilityHandling() {
|
||||
// Test peers with no capabilities
|
||||
let hello1 = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: "iOS",
|
||||
capabilities: nil
|
||||
)
|
||||
|
||||
let hello2 = VersionHello(
|
||||
clientVersion: "1.0.0",
|
||||
platform: "macOS",
|
||||
capabilities: []
|
||||
)
|
||||
|
||||
XCTAssertNotNil(hello1.encode())
|
||||
XCTAssertNotNil(hello2.encode())
|
||||
|
||||
// Should still negotiate successfully
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: hello1.supportedVersions,
|
||||
serverVersions: hello2.supportedVersions
|
||||
)
|
||||
|
||||
XCTAssertNotNil(agreed)
|
||||
}
|
||||
|
||||
// MARK: - Stress Tests
|
||||
|
||||
func testManyVersionsNegotiation() {
|
||||
// Test with many supported versions
|
||||
let manyVersions = Array<UInt8>(1...100)
|
||||
let someVersions = Array<UInt8>([1, 50, 75, 100])
|
||||
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: manyVersions,
|
||||
serverVersions: someVersions
|
||||
)
|
||||
|
||||
XCTAssertEqual(agreed, 100, "Should pick highest common version")
|
||||
}
|
||||
|
||||
func testRapidConnectionDisconnection() {
|
||||
// Test rapid connect/disconnect cycles
|
||||
var states: [String: VersionNegotiationState] = [:]
|
||||
|
||||
for i in 0..<100 {
|
||||
let peerID = "peer\(i)"
|
||||
|
||||
// Connect
|
||||
states[peerID] = .helloSent
|
||||
|
||||
// Negotiate
|
||||
states[peerID] = .ackReceived(version: 1)
|
||||
|
||||
// Disconnect
|
||||
states.removeValue(forKey: peerID)
|
||||
}
|
||||
|
||||
XCTAssertTrue(states.isEmpty, "All states should be cleaned up")
|
||||
}
|
||||
|
||||
// MARK: - Security Tests
|
||||
|
||||
func testLargeVersionListDoS() {
|
||||
// Test protection against DoS with huge version lists
|
||||
let hugeVersionList = Array<UInt8>(0...255) // All possible versions
|
||||
|
||||
let hello = VersionHello(
|
||||
supportedVersions: hugeVersionList,
|
||||
preferredVersion: 255,
|
||||
clientVersion: "1.0.0",
|
||||
platform: "iOS"
|
||||
)
|
||||
|
||||
// Should handle without performance issues
|
||||
let startTime = Date()
|
||||
_ = hello.encode()
|
||||
let encodingTime = Date().timeIntervalSince(startTime)
|
||||
|
||||
XCTAssertLessThan(encodingTime, 0.1, "Encoding should be fast even with large version list")
|
||||
}
|
||||
|
||||
func testVersionDowngradeAttack() {
|
||||
// Test that negotiation always picks highest common version
|
||||
// to prevent downgrade attacks
|
||||
let clientVersions: [UInt8] = [1, 2, 3]
|
||||
let serverVersions: [UInt8] = [1, 2, 3]
|
||||
|
||||
let agreed = ProtocolVersion.negotiateVersion(
|
||||
clientVersions: clientVersions,
|
||||
serverVersions: serverVersions
|
||||
)
|
||||
|
||||
XCTAssertEqual(agreed, 3, "Should not allow downgrade to lower version")
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user