fix #1 UniversalPrivateKey & UniversalPublicKey

src/commonTest/kotlin/KeysTest.kt

@@ -360,4 +360,34 @@ class KeysTest {
         assertTrue { mk.check(k4.verifyingKey) }
         assertTrue { mk.check(k5.verifyingKey) }
     }
+
+    @Test
+    fun testCombinedKeys() = runTest {
+        initCrypto()
+        val k1 = UniversalPrivateKey.new()
+        val k2 = UniversalPrivateKey.new()
+        val k3: UniversalPrivateKey = unpack(pack(k1))
+        assertEquals(k1, k3)
+        assertEquals(k1.publicKey, k3.publicKey)
+        assertEquals(k1.signingKey, k3.signingKey)
+        assertEquals(k1.verifyingKey, k3.verifyingKey)
+
+        val k4: UniversalPublicKey = unpack(pack(k1.publicKey))
+        assertEquals(k1.publicKey, k4)
+        assertEquals(k1.publicKey.encryptingKey, k4.encryptingKey)
+        assertEquals(k1.publicKey.verifyingKey, k4.verifyingKey)
+
+        val data =
+            """We hold these truths to be self-evident, that all men are created equal, 
+                |that they are endowed by their Creator with certain unalienable Rights, 
+                |that among these are Life, Liberty and the pursuit of Happiness."""
+                .trimMargin()
+
+        val kr1 = UniversalRing.from(k1)
+        val kr2: UniversalRing = UniversalRing.from(k2)
+
+        val bytes = Container.encrypt(data, k2.publicKey)
+        assertNull(Container.decrypt<String>(bytes, kr1))
+        assertEquals(data, Container.decrypt<String>(bytes, kr2))
+    }
 }