java_src/src/test/java/com/google/crypto/tink/aead/AeadFactoryWithoutWrapperRegisteredTest.java

// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////

package com.google.crypto.tink.aead;

import static com.google.common.truth.Truth.assertThat;
import static java.nio.charset.StandardCharsets.UTF_8;

import com.google.crypto.tink.Aead;
import com.google.crypto.tink.KeyTemplates;
import com.google.crypto.tink.KeysetHandle;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Unit test for {@link AeadFactory}.
 *
 * <p>The test case in this file needs {@link Registry} to not have AeadWrapper registered. That's
 * why it is in its own test file.
 */
@RunWith(JUnit4.class)
public class AeadFactoryWithoutWrapperRegisteredTest {

  @Test
  @SuppressWarnings("deprecation") // This is a test that the deprecated function works.
  public void deprecatedFactoryGetPrimitive_whenWrapperHasNotBeenRegistered_works()
      throws Exception {
    // Only register AesCtrHmacAeadKeyManager, but not the AeadWrapper.
    AesCtrHmacAeadKeyManager.register(/*newKeyAllowed=*/ true);
    KeysetHandle handle = KeysetHandle.generateNew(KeyTemplates.get("AES128_CTR_HMAC_SHA256"));

    Aead aead = AeadFactory.getPrimitive(handle);

    byte[] plaintext = "plaintext".getBytes(UTF_8);
    byte[] associatedData = "associatedData".getBytes(UTF_8);
    byte[] ciphertext = aead.encrypt(plaintext, associatedData);
    assertThat(aead.decrypt(ciphertext, associatedData)).isEqualTo(plaintext);
  }
}