java/src/test/java/com/google/crypto/tink/ConfigTest.java

// Copyright 2017 Google Inc.
//
// 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;

import static org.junit.Assert.fail;

import com.google.crypto.tink.aead.AeadConfig;
import com.google.crypto.tink.hybrid.HybridConfig;
import com.google.crypto.tink.proto.KeyTypeEntry;
import com.google.crypto.tink.proto.RegistryConfig;
import com.google.crypto.tink.signature.SignatureConfig;
import java.security.GeneralSecurityException;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Tests for Config. */
@RunWith(JUnit4.class)
public class ConfigTest {
  private RegistryConfig createAeadConfig() {
    return RegistryConfig.newBuilder()
        .addEntry(Config.getTinkKeyTypeEntry("TinkAead", "Aead", "AesEaxKey", 0, true))
        .setConfigName("TINK_AEAD_1_0_0")
        .build();
  }

  private RegistryConfig createMacConfig() {
    return RegistryConfig.newBuilder()
        .addEntry(Config.getTinkKeyTypeEntry("TinkMac", "Mac", "HmacKey", 0, true))
        .setConfigName("TINK_MAC_1_0_0")
        .build();
  }

  private RegistryConfig createHybridConfig() {
    return RegistryConfig.newBuilder()
        .addEntry(
            Config.getTinkKeyTypeEntry(
                "TinkHybridDecrypt", "HybridDecrypt", "EciesAeadHkdfPrivateKey", 0, true))
        .addEntry(
            Config.getTinkKeyTypeEntry(
                "TinkHybridEncrypt", "HybridEncrypt", "EciesAeadHkdfPublicKey", 0, true))
        .setConfigName("TINK_HYBRID_1_0_0")
        .build();
  }

  private RegistryConfig createSignatureConfig() {
    return RegistryConfig.newBuilder()
        .addEntry(
            Config.getTinkKeyTypeEntry(
                "TinkPublicKeySign", "PublicKeySign", "EcdsaPrivateKey", 0, true))
        .addEntry(
            Config.getTinkKeyTypeEntry(
                "TinkPublicKeyVerify", "PublicKeyVerify", "Ed25519PublicKey", 0, true))
        .build();
  }

  @Test
  public void testRegisterKeyType_NoCatalogue_shouldThrowException() throws Exception {
    KeyTypeEntry entry = KeyTypeEntry.newBuilder().setCatalogueName("DoesNotExist").build();

    try {
      Config.registerKeyType(entry);
      fail("Expected GeneralSecurityException");
    } catch (GeneralSecurityException e) {
      // expected
    }
  }

  private void testRegister_NoCatalogue_shouldThrowException(RegistryConfig config)
      throws Exception {
    try {
      Config.register(config);
      fail("Expected GeneralSecurityException");
    } catch (GeneralSecurityException e) {
      // expected
    }
  }

  @Test
  public void testRegister_initialization_shouldWork() throws Exception {
    Registry.reset();
    // The registry is empty, register should fail.
    testRegister_NoCatalogue_shouldThrowException(createAeadConfig());
    testRegister_NoCatalogue_shouldThrowException(createMacConfig());
    testRegister_NoCatalogue_shouldThrowException(createHybridConfig());
    testRegister_NoCatalogue_shouldThrowException(createSignatureConfig());

    // Fill the registry with Aead key managers.
    AeadConfig.init();
    // Now register for Aead and Mac should succeed.
    Config.register(createAeadConfig());
    Config.register(createMacConfig());

    // But hybrid should be still failing.
    testRegister_NoCatalogue_shouldThrowException(createHybridConfig());
    HybridConfig.init();
    // Hybrid should work now.
    Config.register(createHybridConfig());

    // Signature is still failing.
    testRegister_NoCatalogue_shouldThrowException(createSignatureConfig());
    SignatureConfig.init();
    // Signature should work now.
    Config.register(createSignatureConfig());
  }
}