Make the middleware usable and add tests

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: test
+on:
+- pull_request
+jobs:
+  #jwtmiddleware_macos:
+  #  runs-on: macos-latest
+  #  env:
+  #    DEVELOPER_DIR: /Applications/Xcode_11.4_beta.app/Contents/Developer
+  #  steps:
+  #  - uses: actions/checkout@v2
+  #  - run: brew install vapor/tap/vapor-beta
+  #  - run: xcrun swift test --enable-test-discovery --sanitize=thread
+  jwtmiddleware_xenial:
+    container: 
+      image: vapor/swift:5.2-xenial
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: swift test --enable-test-discovery --sanitize=thread
+  jwtmiddleware_bionic:
+    container: 
+      image: vapor/swift:5.2-bionic
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: swift test --enable-test-discovery --sanitize=thread
+

.gitignore

@@ -2,3 +2,5 @@
 /.build
 /Packages
 /*.xcodeproj
+/.swiftpm
+Package.resolved

Package.swift

@@ -1,5 +1,4 @@
-// swift-tools-version:5.1
-
+// swift-tools-version:5.2
 import PackageDescription
 
 let package = Package(
@@ -11,11 +10,17 @@ let package = Package(
         .library(name: "JWTMiddleware", targets: ["JWTMiddleware"]),
     ],
     dependencies: [
-    .package(url: "https://github.com/vapor/vapor.git", from: "4.0.0-beta.3"),
-    .package(url: "https://github.com/vapor/jwt.git", from: "4.0.0-beta.2"),
+        .package(url: "https://github.com/vapor/vapor.git", from: "4.0.0-rc"),
+        .package(url: "https://github.com/vapor/jwt.git", from: "4.0.0-rc"),
     ],
     targets: [
-        .target(name: "JWTMiddleware", dependencies: ["Vapor", "JWT"]),
-        .testTarget(name: "JWTMiddlewareTests", dependencies: ["JWTMiddleware"])
+        .target(name: "JWTMiddleware", dependencies: [
+            .product(name: "Vapor", package: "vapor"),
+            .product(name: "JWT", package: "jwt"),
+        ]),
+        .testTarget(name: "JWTMiddlewareTests", dependencies: [
+            .byName(name: "JWTMiddleware"),
+            .product(name: "XCTVapor", package: "vapor"),
+        ])
     ]
 )

Sources/JWTMiddleware/JWTMiddleware.swift

@@ -1,10 +1,10 @@
 import Vapor
 import JWT
 
-final class JWTMiddleware<T: JWTPayload>: Middleware {
-    init() { }
+public final class JWTMiddleware<T: JWTPayload>: Middleware {
+    public init() {}
 
-    func respond(to request: Request, chainingTo next: Responder) -> EventLoopFuture<Response> {
+    public func respond(to request: Request, chainingTo next: Responder) -> EventLoopFuture<Response> {
 
         guard let token = request.headers.bearerAuthorization?.token.utf8 else {
             return request.eventLoop.makeFailedFuture(Abort(.unauthorized, reason: "Missing authorization bearer header"))
@@ -24,19 +24,13 @@ final class JWTMiddleware<T: JWTPayload>: Middleware {
 
 }
 
-extension AnyHashable {
-    static let payload: String = "jwt_payload"
-}
-
 extension Request {
-    var loggedIn: Bool {
-        if (self.userInfo[.payload] as? JWTPayload) != nil {
-            return true
-        }
-        return false
+    private struct PayloadKey: StorageKey {
+        typealias Value = JWTPayload
     }
+
     var payload: JWTPayload {
-        get { self.userInfo[.payload] as! JWTPayload }
-        set { self.userInfo[.payload] = newValue }
+        get { self.storage[PayloadKey.self]! }
+        set { self.storage[PayloadKey.self] = newValue }
     }
 }

Tests/JWTMiddlewareTests/JWTMiddlewareTests.swift

@@ -1,10 +1,86 @@
 import XCTest
+import JWT
+import Vapor
+import XCTVapor
+import CNIOBoringSSL
 @testable import JWTMiddleware
+@testable import JWTKit
+
+struct TestPayload: JWTPayload {
+    let id: UUID
+    let exp: TimeInterval
+
+    init(id: UUID, exp: TimeInterval) {
+        self.id = id
+        self.exp = exp
+    }
+
+    func verify(using signer: JWTSigner) throws {
+        _ = SubjectClaim(value: self.id.uuidString) // Nothing to verify here.
+        try ExpirationClaim(value: Date(timeIntervalSince1970: self.exp)).verifyNotExpired()
+    }
+}
 
 final class JWTMiddlewareTests: XCTestCase {
-    func testExample() {}
 
-    static var allTests = [
-        ("testExample", testExample),
-    ]
+    var tester: Application!
+
+    override func setUpWithError() throws {
+        // CryptoKit only generates EC keys and I don't know how to turn the raw representation into JWKS.
+        var exp: BIGNUM = .init(); CNIOBoringSSL_BN_set_u64(&exp, 0x10001)
+        var rsa: RSA = .init(); CNIOBoringSSL_RSA_generate_key_ex(&rsa, 4096, &exp, nil)
+
+        let dBytes: [UInt8] = .init(unsafeUninitializedCapacity: Int(CNIOBoringSSL_BN_num_bytes(rsa.d))) { $1 = CNIOBoringSSL_BN_bn2bin(rsa.d, $0.baseAddress!) }
+        let nBytes: [UInt8] = .init(unsafeUninitializedCapacity: Int(CNIOBoringSSL_BN_num_bytes(rsa.n))) { $1 = CNIOBoringSSL_BN_bn2bin(rsa.n, $0.baseAddress!) }
+        struct LocalJWKS: Codable {
+            struct LocalJWK: Codable { let kty, d, e, n, use, kid, alg: String }
+            let keys: [LocalJWK]
+        }
+        let keyset = LocalJWKS(keys: [.init(kty: "RSA", d: String(bytes: dBytes.base64URLEncodedBytes(), encoding: .utf8)!, e: "AQAB", n: String(bytes: nBytes.base64URLEncodedBytes(), encoding: .utf8)!, use: "sig", kid: "jwttest", alg: "RS256")])
+        let json = try JSONEncoder().encode(keyset)
+
+        tester = Application(.testing)
+        try tester.jwt.signers.use(jwksJSON: String(data: json, encoding: .utf8)!)
+    }
+
+    override func tearDownWithError() throws {
+        tester?.shutdown()
+    }
+
+    func testPayloadValidationUnexpired() throws {
+        let testPayload = TestPayload(id: UUID(), exp: Date(timeIntervalSinceNow: 10.0).timeIntervalSince1970)
+
+        tester.middleware.use(JWTMiddleware<TestPayload>())
+        tester.get("hello") { _ in "world" }
+
+        let token = try tester.jwt.signers.sign(testPayload, kid: "jwttest")
+
+        _ = try XCTUnwrap(tester.testable(method: .inMemory).test(.GET, "/hello", headers: ["Authorization": "Bearer \(token)"]) { res in
+            XCTAssertEqual(res.body.string, "world")
+        })
+    }
+
+    func testPayloadValidationExpired() throws {
+        let testPayload = TestPayload(id: UUID(), exp: Date(timeIntervalSinceNow: -10.0).timeIntervalSince1970)
+
+        tester.middleware.use(JWTMiddleware<TestPayload>())
+        tester.get("hello") { _ in "world" }
+
+        let token = try tester.jwt.signers.sign(testPayload, kid: "jwttest")
+
+        _ = try XCTUnwrap(tester.testable(method: .inMemory).test(.GET, "/hello", headers: ["Authorization": "Bearer \(token)"]) { res in
+            XCTAssertEqual(res.status, .unauthorized)
+
+            struct JWTErrorResponse: Codable {
+                let error: Bool
+                let reason: String
+            }
+
+            guard let content = try? XCTUnwrap(res.content.decode(JWTErrorResponse.self)) else {
+                return
+            }
+            XCTAssertEqual(content.error, true)
+            XCTAssertEqual(content.reason, "exp claim verification failed: expired")
+        })
+    }
 }