Improve validator for IPv6.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

Shared/Validators.swift

@@ -34,15 +34,18 @@ struct Endpoint {
     var addressType: AddressType
 
     init?(endpointString: String) throws {
-        let parts = endpointString.split(separator: ":")
+        guard let range = endpointString.range(of: ":", options: .backwards, range: nil, locale: nil) else {
-        guard parts.count == 2 else {
             throw EndpointValidationError.noIpAndPort(endpointString)
         }
-        guard let port = Int32(parts[1]), port > 0 else {
+
-            throw EndpointValidationError.invalidPort(String(parts[1]))
+        let ipString = endpointString[..<range.lowerBound].replacingOccurrences(of: "[", with: "").replacingOccurrences(of: "]", with: "")
+        let portString = endpointString[range.upperBound...]
+
+        guard let port = Int32(portString), port > 0 else {
+            throw EndpointValidationError.invalidPort(String(portString/*parts[1]*/))
         }
 
-        ipAddress = String(parts[0])
+        ipAddress = String(ipString)
         let addressType = validateIpAddress(ipToValidate: ipAddress)
         guard addressType == .IPv4 || addressType == .IPv6 else {
             throw EndpointValidationError.invalidIP(ipAddress)

WireGuard.xcodeproj/project.pbxproj

@@ -17,7 +17,6 @@
 		4A4BACEB20B5F1BF00F12B28 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 4A4BACE920B5F1BF00F12B28 /* Main.storyboard */; };
 		4A4BACED20B5F1C100F12B28 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 4A4BACEC20B5F1C100F12B28 /* Assets.xcassets */; };
 		4A4BACF020B5F1C100F12B28 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 4A4BACEE20B5F1C100F12B28 /* LaunchScreen.storyboard */; };
-		4A4BACFB20B5F1C100F12B28 /* WireGuardTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4A4BACFA20B5F1C100F12B28 /* WireGuardTests.swift */; };
 		4A4BAD0620B5F4B500F12B28 /* Settings.bundle in Resources */ = {isa = PBXBuildFile; fileRef = 4A4BAD0520B5F4B500F12B28 /* Settings.bundle */; };
 		4A4BAD0C20B5F6AA00F12B28 /* AppCoordinator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4A4BAD0B20B5F6AA00F12B28 /* AppCoordinator.swift */; };
 		4A4BAD0E20B5F6C300F12B28 /* Coordinator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4A4BAD0D20B5F6C300F12B28 /* Coordinator.swift */; };
@@ -89,7 +88,6 @@
 		4A4BACEF20B5F1C100F12B28 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 		4A4BACF120B5F1C100F12B28 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		4A4BACF620B5F1C100F12B28 /* WireGuardTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = WireGuardTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
-		4A4BACFA20B5F1C100F12B28 /* WireGuardTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WireGuardTests.swift; sourceTree = "<group>"; };
 		4A4BACFC20B5F1C100F12B28 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		4A4BAD0520B5F4B500F12B28 /* Settings.bundle */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.plug-in"; path = Settings.bundle; sourceTree = "<group>"; };
 		4A4BAD0B20B5F6AA00F12B28 /* AppCoordinator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppCoordinator.swift; sourceTree = "<group>"; };
@@ -196,7 +194,6 @@
 		4A4BACF920B5F1C100F12B28 /* WireGuardTests */ = {
 			isa = PBXGroup;
 			children = (
-				4A4BACFA20B5F1C100F12B28 /* WireGuardTests.swift */,
 				4A4BACFC20B5F1C100F12B28 /* Info.plist */,
 				4A43515B21249E5700261999 /* ValidatorsTests.swift */,
 			);
@@ -554,7 +551,6 @@
 			buildActionMask = 2147483647;
 			files = (
 				4A43515C21249E5700261999 /* ValidatorsTests.swift in Sources */,
-				4A4BACFB20B5F1C100F12B28 /* WireGuardTests.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

WireGuardTests/ValidatorsTests.swift

@@ -10,47 +10,56 @@ import XCTest
 @testable import WireGuard
 
 class ValidatorsTests: XCTestCase {
-    func testIPv6Endpoint() throws {
+    func testEndpoint() throws {
-        XCTFail("Still needs implementation")
+        _ = try Endpoint(endpointString: "[2607:f938:3001:4000::aac]:12345")
-    }
-
-    func testIPv4Endpoint() throws {
         _ = try Endpoint(endpointString: "192.168.0.1:12345")
     }
 
-    func testIPv4Endpoint_invalidIP() throws {
+    func testEndpoint_invalidIP() throws {
-        XCTAssertThrowsError(try Endpoint(endpointString: "12345:12345")) { (error) in
+        func executeTest(endpointString: String, ipString: String, file: StaticString = #file, line: UInt = #line) {
+            XCTAssertThrowsError(try Endpoint(endpointString: endpointString)) { (error) in
                 guard case EndpointValidationError.invalidIP(let value) = error else {
-                return XCTFail("Unexpected error")
+                    return XCTFail("Unexpected error: \(error)", file: file, line: line)
                 }
-            XCTAssertEqual(value, "12345")
+                XCTAssertEqual(value, ipString, file: file, line: line)
             }
         }
 
-    func testIPv4Endpoint_invalidPort() throws {
+        executeTest(endpointString: "12345:12345", ipString: "12345")
-        XCTAssertThrowsError(try Endpoint(endpointString: "192.168.0.1:-12345")) { (error) in
+        executeTest(endpointString: ":12345", ipString: "")
+    }
+
+    func testEndpoint_invalidPort() throws {
+        func executeTest(endpointString: String, portString: String, file: StaticString = #file, line: UInt = #line) {
+            XCTAssertThrowsError(try Endpoint(endpointString: endpointString)) { (error) in
                 guard case EndpointValidationError.invalidPort(let value) = error else {
-                return XCTFail("Unexpected error")
+                    return XCTFail("Unexpected error: \(error)", file: file, line: line)
                 }
-            XCTAssertEqual(value, "-12345")
+                XCTAssertEqual(value, portString, file: file, line: line)
             }
         }
 
-    func testIPv4Endpoint_noIpAndPort() throws {
+        executeTest(endpointString: ":", portString: "")
+        executeTest(endpointString: "[2607:f938:3001:4000::aac]:-12345", portString: "-12345")
+        executeTest(endpointString: "[2607:f938:3001:4000::aac]", portString: "aac]")
+        executeTest(endpointString: "[2607:f938:3001:4000::aac]:", portString: "")
+        executeTest(endpointString: "192.168.0.1:-12345", portString: "-12345")
+        executeTest(endpointString: "192.168.0.1:", portString: "")
 
-        func executeTest(endpointString: String) {
+    }
+
+    func testEndpoint_noIpAndPort() throws {
+
+        func executeTest(endpointString: String, file: StaticString = #file, line: UInt = #line) {
             XCTAssertThrowsError(try Endpoint(endpointString: endpointString)) { (error) in
                 guard case EndpointValidationError.noIpAndPort(let value) = error else {
-                    return XCTFail("Unexpected error")
+                    return XCTFail("Unexpected error: \(error)", file: file, line: line)
                 }
-                XCTAssertEqual(value, endpointString, file: #file, line: #line)
+                XCTAssertEqual(value, endpointString, file: file, line: line)
             }
         }
 
-        executeTest(endpointString: ":")
         executeTest(endpointString: "192.168.0.1")
-        executeTest(endpointString: "192.168.0.1:")
-        executeTest(endpointString: ":12345")
         executeTest(endpointString: "12345")
     }
 }

WireGuardTests/WireGuardTests.swift

@@ -1,36 +0,0 @@
-//
-//  WireGuardTests.swift
-//  WireGuardTests
-//
-//  Created by Jeroen Leenarts on 23-05-18.
-//  Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All rights reserved.
-//
-
-import XCTest
-@testable import WireGuard
-
-class WireGuardTests: XCTestCase {
-
-    override func setUp() {
-        super.setUp()
-        // Put setup code here. This method is called before the invocation of each test method in the class.
-    }
-
-    override func tearDown() {
-        // Put teardown code here. This method is called after the invocation of each test method in the class.
-        super.tearDown()
-    }
-
-    func testExample() {
-        // This is an example of a functional test case.
-        // Use XCTAssert and related functions to verify your tests produce the correct results.
-    }
-
-    func testPerformanceExample() {
-        // This is an example of a performance test case.
-        self.measure {
-            // Put the code you want to measure the time of here.
-        }
-    }
-
-}