0.10.6

Tests/CryptoKitAESGCMEngineTests.swift

@@ -0,0 +1,33 @@
+import XCTest
+@testable import Luma
+
+final class CryptoKitAESGCMEngineTests: XCTestCase {
+    func testRoundTrip() {
+        let engine = CryptoKitAESGCMEngine()
+        let key = Data(repeating: 0x31, count: 16)
+        let iv = Data(repeating: 0x22, count: 12)
+        let plaintext = Data("hello omemo".utf8)
+        var ciphertext = Data()
+        var tag = Data()
+
+        XCTAssertTrue(engine.encrypt(iv: iv, key: key, message: plaintext, output: &ciphertext, tag: &tag))
+
+        var decrypted = Data()
+        XCTAssertTrue(engine.decrypt(iv: iv, key: key, encoded: ciphertext, auth: tag, output: &decrypted))
+        XCTAssertEqual(decrypted, plaintext)
+    }
+
+    func testModifiedTagFails() {
+        let engine = CryptoKitAESGCMEngine()
+        let key = Data(repeating: 0x31, count: 16)
+        let iv = Data(repeating: 0x22, count: 12)
+        var ciphertext = Data()
+        var tag = Data()
+        XCTAssertTrue(engine.encrypt(iv: iv, key: key, message: Data("secret".utf8), output: &ciphertext, tag: &tag))
+        tag[0] ^= 0x01
+
+        var decrypted = Data()
+        XCTAssertFalse(engine.decrypt(iv: iv, key: key, encoded: ciphertext, auth: tag, output: &decrypted))
+    }
+}
+