private static TINKKeysetHandle LoadOrCreateKey(string keyName, Func <TINKKeysetHandle> createProvider) { TINKKeysetHandle handle = LoadFromKeychain(keyName); if (handle != null) { Debug.WriteLine("Found key in iOS keychain, loaded: " + keyName); return(handle); } // create new and store handle = createProvider(); if (handle == null) { throw new Exception("Failed to create key: " + keyName); } if (!handle.WriteToKeychainWithName(keyName, false, out NSError error)) { throw new Exception("Failed to store key to iOS keychain: " + keyName); } return(handle); }
private void TestTink() { RegisterAead(); // gen key NSError error; var tpl = new TINKAeadKeyTemplate(TINKAeadKeyTemplates.Aes256Gcm, out error); if (error != null) { Console.WriteLine("Error: " + error); return; } var handle = new TINKKeysetHandle(tpl, out error); if (error != null) { Console.WriteLine("Error: " + error); return; } // store var keysetName = "co.tnn.tink.demo_key"; if (!handle.WriteToKeychainWithName(keysetName, true, out error)) { Console.WriteLine("Error: " + error); return; } // load TINKKeysetHandle handleStore = new TINKKeysetHandle(keysetName, out error); if (error != null) { Console.WriteLine("Error: " + error); return; } // AEAD ITINKAead aead = TINKAeadFactory.PrimitiveWithKeysetHandle(handleStore, out error); if (error != null) { Console.WriteLine("Error: " + error); return; } // encrypt NSData cipher = aead.Encrypt(NSData.FromString("hello world", NSStringEncoding.UTF8), NSData.FromString("k_value", NSStringEncoding.UTF8), out error); if (error != null) { Console.WriteLine("Error: " + error); return; } Console.WriteLine(cipher.GetBase64EncodedString(NSDataBase64EncodingOptions.None)); // decrypt var plain = aead.Decrypt(cipher, NSData.FromString("k_value", NSStringEncoding.UTF8), out error); if (error != null) { Console.WriteLine("Error: " + error); return; } Console.WriteLine(plain.ToString(NSStringEncoding.UTF8)); }