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// 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.hybrid;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import com.google.crypto.tink.aead.AeadKeyTemplates;
import com.google.crypto.tink.proto.EcPointFormat;
import com.google.crypto.tink.proto.EciesAeadHkdfKeyFormat;
import com.google.crypto.tink.proto.EciesHkdfKemParams;
import com.google.crypto.tink.proto.EllipticCurveType;
import com.google.crypto.tink.proto.HashType;
import com.google.crypto.tink.proto.KeyTemplate;
import com.google.crypto.tink.proto.OutputPrefixType;
import com.google.protobuf.ExtensionRegistryLite;
import java.nio.charset.Charset;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for HybridKeyTemplates. */
@RunWith(JUnit4.class)
public class HybridKeyTemplatesTest {
private static final Charset UTF_8 = Charset.forName("UTF-8");
@Test
public void eciesP256HkdfHmaSha256Aes128Gcm() throws Exception {
KeyTemplate template = HybridKeyTemplates.ECIES_P256_HKDF_HMAC_SHA256_AES128_GCM;
assertEquals(new EciesAeadHkdfPrivateKeyManager().getKeyType(), template.getTypeUrl());
assertEquals(OutputPrefixType.TINK, template.getOutputPrefixType());
EciesAeadHkdfKeyFormat format =
EciesAeadHkdfKeyFormat.parseFrom(
template.getValue(), ExtensionRegistryLite.getEmptyRegistry());
assertTrue(format.hasParams());
assertTrue(format.getParams().hasKemParams());
assertTrue(format.getParams().hasDemParams());
assertTrue(format.getParams().getDemParams().hasAeadDem());
assertEquals(EcPointFormat.UNCOMPRESSED, format.getParams().getEcPointFormat());
EciesHkdfKemParams kemParams = format.getParams().getKemParams();
assertEquals(EllipticCurveType.NIST_P256, kemParams.getCurveType());
assertEquals(HashType.SHA256, kemParams.getHkdfHashType());
assertTrue(kemParams.getHkdfSalt().isEmpty());
assertEquals(AeadKeyTemplates.AES128_GCM.toString(),
format.getParams().getDemParams().getAeadDem().toString());
}
@Test
public void eciesP256HkdfHmacSha256Aes128GcmCompressedWithoutPrefix() throws Exception {
KeyTemplate template =
HybridKeyTemplates.ECIES_P256_HKDF_HMAC_SHA256_AES128_GCM_COMPRESSED_WITHOUT_PREFIX;
assertEquals(new EciesAeadHkdfPrivateKeyManager().getKeyType(), template.getTypeUrl());
assertEquals(OutputPrefixType.RAW, template.getOutputPrefixType());
EciesAeadHkdfKeyFormat format =
EciesAeadHkdfKeyFormat.parseFrom(
template.getValue(), ExtensionRegistryLite.getEmptyRegistry());
assertTrue(format.hasParams());
assertTrue(format.getParams().hasKemParams());
assertTrue(format.getParams().hasDemParams());
assertTrue(format.getParams().getDemParams().hasAeadDem());
assertEquals(EcPointFormat.COMPRESSED, format.getParams().getEcPointFormat());
EciesHkdfKemParams kemParams = format.getParams().getKemParams();
assertEquals(EllipticCurveType.NIST_P256, kemParams.getCurveType());
assertEquals(HashType.SHA256, kemParams.getHkdfHashType());
assertTrue(kemParams.getHkdfSalt().isEmpty());
assertEquals(AeadKeyTemplates.AES128_GCM.toString(),
format.getParams().getDemParams().getAeadDem().toString());
}
@Test
public void eciesP256HkdfHmacSha256Aes128CtrHmacSha256() throws Exception {
KeyTemplate template = HybridKeyTemplates.ECIES_P256_HKDF_HMAC_SHA256_AES128_CTR_HMAC_SHA256;
assertEquals(new EciesAeadHkdfPrivateKeyManager().getKeyType(), template.getTypeUrl());
assertEquals(OutputPrefixType.TINK, template.getOutputPrefixType());
EciesAeadHkdfKeyFormat format =
EciesAeadHkdfKeyFormat.parseFrom(
template.getValue(), ExtensionRegistryLite.getEmptyRegistry());
assertTrue(format.hasParams());
assertTrue(format.getParams().hasKemParams());
assertTrue(format.getParams().hasDemParams());
assertTrue(format.getParams().getDemParams().hasAeadDem());
assertEquals(EcPointFormat.UNCOMPRESSED, format.getParams().getEcPointFormat());
EciesHkdfKemParams kemParams = format.getParams().getKemParams();
assertEquals(EllipticCurveType.NIST_P256, kemParams.getCurveType());
assertEquals(HashType.SHA256, kemParams.getHkdfHashType());
assertTrue(kemParams.getHkdfSalt().isEmpty());
assertEquals(AeadKeyTemplates.AES128_CTR_HMAC_SHA256.toString(),
format.getParams().getDemParams().getAeadDem().toString());
}
@Test
public void testCreateEciesAeadHkdfKeyTemplate() throws Exception {
// Intentionally using "weird" or invalid values for parameters,
// to test that the function correctly puts them in the resulting template.
EllipticCurveType curveType = EllipticCurveType.NIST_P384;
HashType hashType = HashType.SHA512;
EcPointFormat ecPointFormat = EcPointFormat.COMPRESSED;
KeyTemplate demKeyTemplate = AeadKeyTemplates.AES256_EAX;
String salt = "some salt";
KeyTemplate template = HybridKeyTemplates.createEciesAeadHkdfKeyTemplate(
curveType, hashType, ecPointFormat, demKeyTemplate,
OutputPrefixType.TINK, salt.getBytes(UTF_8));
assertEquals(new EciesAeadHkdfPrivateKeyManager().getKeyType(), template.getTypeUrl());
assertEquals(OutputPrefixType.TINK, template.getOutputPrefixType());
EciesAeadHkdfKeyFormat format =
EciesAeadHkdfKeyFormat.parseFrom(
template.getValue(), ExtensionRegistryLite.getEmptyRegistry());
assertTrue(format.hasParams());
assertTrue(format.getParams().hasKemParams());
assertTrue(format.getParams().hasDemParams());
assertTrue(format.getParams().getDemParams().hasAeadDem());
assertEquals(ecPointFormat, format.getParams().getEcPointFormat());
EciesHkdfKemParams kemParams = format.getParams().getKemParams();
assertEquals(curveType, kemParams.getCurveType());
assertEquals(hashType, kemParams.getHkdfHashType());
assertEquals(salt, kemParams.getHkdfSalt().toStringUtf8());
assertEquals(AeadKeyTemplates.AES256_EAX.toString(),
format.getParams().getDemParams().getAeadDem().toString());
}
}
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