| // 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.prf; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| import static org.junit.Assert.assertArrayEquals; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertThrows; |
| |
| import com.google.crypto.tink.KeysetHandle; |
| import com.google.crypto.tink.PrimitiveSet; |
| import com.google.crypto.tink.Registry; |
| import com.google.crypto.tink.proto.KeyStatusType; |
| import com.google.crypto.tink.proto.Keyset; |
| import com.google.crypto.tink.proto.OutputPrefixType; |
| import com.google.crypto.tink.subtle.Random; |
| import com.google.crypto.tink.testing.TestUtil; |
| import java.security.GeneralSecurityException; |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| import org.junit.function.ThrowingRunnable; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for PrfSetWrapper. */ |
| @RunWith(JUnit4.class) |
| public class PrfSetWrapperTest { |
| private static final int KEY_SIZE = 32; |
| |
| @BeforeClass |
| public static void setUp() throws Exception { |
| PrfConfig.register(); |
| } |
| |
| @Test |
| public void testSmallPlaintextWithRawKey() throws Exception { |
| byte[] keyValue = Random.randBytes(KEY_SIZE); |
| Keyset.Key primary = |
| TestUtil.createKey( |
| TestUtil.createPrfKeyData(keyValue), |
| /* keyId= */ 5, |
| KeyStatusType.ENABLED, |
| OutputPrefixType.RAW); |
| KeysetHandle keysetHandle = TestUtil.createKeysetHandle(TestUtil.createKeyset(primary)); |
| byte[] plaintext = "blah".getBytes(UTF_8); |
| |
| PrfSet prfSet = new PrfSetWrapper().wrap(Registry.getPrimitives(keysetHandle, PrfSet.class)); |
| byte[] prs = prfSet.computePrimary(plaintext, 12); |
| byte[] prs2 = prfSet.getPrfs().get(5).compute(plaintext, 12); |
| |
| assertEquals(5, prfSet.getPrimaryId()); |
| assertThat(prfSet.getPrfs()).hasSize(1); |
| assertThat(prs).hasLength(12); |
| assertArrayEquals(prs2, prs); |
| } |
| |
| @Test |
| public void testSmallPlaintextWithMultipleKeys() throws Exception { |
| byte[] primaryKeyValue = Random.randBytes(KEY_SIZE); |
| Keyset.Key primary = |
| TestUtil.createKey( |
| TestUtil.createPrfKeyData(primaryKeyValue), |
| /* keyId= */ 5, |
| KeyStatusType.ENABLED, |
| OutputPrefixType.RAW); |
| byte[] secondaryKeyValue = Random.randBytes(KEY_SIZE); |
| Keyset.Key secondary = |
| TestUtil.createKey( |
| TestUtil.createPrfKeyData(secondaryKeyValue), |
| /* keyId= */ 6, |
| KeyStatusType.ENABLED, |
| OutputPrefixType.RAW); |
| KeysetHandle keysetHandle = |
| TestUtil.createKeysetHandle(TestUtil.createKeyset(primary, secondary)); |
| byte[] plaintext = "blah".getBytes(UTF_8); |
| |
| PrfSet prfSet = new PrfSetWrapper().wrap(Registry.getPrimitives(keysetHandle, PrfSet.class)); |
| byte[] prsPrimary = prfSet.computePrimary(plaintext, 12); |
| byte[] prs5 = prfSet.getPrfs().get(5).compute(plaintext, 12); |
| byte[] prs6 = prfSet.getPrfs().get(6).compute(plaintext, 12); |
| |
| assertEquals(5, prfSet.getPrimaryId()); |
| assertThat(prfSet.getPrfs()).hasSize(2); |
| assertThat(prsPrimary).hasLength(12); |
| assertArrayEquals(prs5, prsPrimary); |
| assertThat(prsPrimary).isNotEqualTo(prs6); |
| } |
| |
| @Test |
| public void testWrapEmptyThrows() throws Exception { |
| final PrimitiveSet<PrfSet> primitiveSet = PrimitiveSet.newPrimitiveSet(PrfSet.class); |
| |
| assertThrows( |
| GeneralSecurityException.class, |
| new ThrowingRunnable() { |
| @Override |
| public void run() throws Throwable { |
| new PrfSetWrapper().wrap(primitiveSet); |
| } |
| }); |
| } |
| |
| @Test |
| public void testWrapNoPrimaryThrows() throws Exception { |
| byte[] primaryKeyValue = Random.randBytes(KEY_SIZE); |
| Keyset.Key primary = |
| TestUtil.createKey( |
| TestUtil.createPrfKeyData(primaryKeyValue), |
| /* keyId= */ 5, |
| KeyStatusType.ENABLED, |
| OutputPrefixType.RAW); |
| final Prf unusedPrf = |
| new Prf() { |
| @Override |
| public byte[] compute(byte[] input, int outputLength) throws GeneralSecurityException { |
| return new byte[0]; |
| } |
| }; |
| final PrimitiveSet<PrfSet> primitiveSet = PrimitiveSet.newPrimitiveSet(PrfSet.class); |
| primitiveSet.addPrimitive( |
| new PrfSet() { |
| @Override |
| public int getPrimaryId() { |
| return 0; |
| } |
| |
| @Override |
| public Map<Integer, Prf> getPrfs() throws GeneralSecurityException { |
| HashMap<Integer, Prf> prfMap = new HashMap<>(); |
| prfMap.put(0, unusedPrf); |
| return prfMap; |
| } |
| }, |
| primary); |
| // Note: Added a primary key but did not call primitiveSet.setPrimary(). |
| |
| assertThrows( |
| GeneralSecurityException.class, |
| new ThrowingRunnable() { |
| @Override |
| public void run() throws Throwable { |
| new PrfSetWrapper().wrap(primitiveSet); |
| } |
| }); |
| } |
| |
| @Test |
| public void testMultiplePrfsIntoWrapperThrows() throws Exception { |
| byte[] primaryKeyValue = Random.randBytes(KEY_SIZE); |
| Keyset.Key primary = |
| TestUtil.createKey( |
| TestUtil.createPrfKeyData(primaryKeyValue), |
| /* keyId= */ 5, |
| KeyStatusType.ENABLED, |
| OutputPrefixType.RAW); |
| final Prf unusedPrf = |
| new Prf() { |
| @Override |
| public byte[] compute(byte[] input, int outputLength) throws GeneralSecurityException { |
| return new byte[0]; |
| } |
| }; |
| final PrimitiveSet<PrfSet> primitiveSet = PrimitiveSet.newPrimitiveSet(PrfSet.class); |
| primitiveSet.setPrimary( |
| primitiveSet.addPrimitive( |
| new PrfSet() { |
| @Override |
| public int getPrimaryId() { |
| return 0; |
| } |
| |
| @Override |
| public Map<Integer, Prf> getPrfs() throws GeneralSecurityException { |
| HashMap<Integer, Prf> prfMap = new HashMap<>(); |
| prfMap.put(0, unusedPrf); |
| prfMap.put(1, unusedPrf); |
| return prfMap; |
| } |
| }, |
| primary)); |
| |
| assertThrows( |
| GeneralSecurityException.class, |
| new ThrowingRunnable() { |
| @Override |
| public void run() throws Throwable { |
| new PrfSetWrapper().wrap(primitiveSet); |
| } |
| }); |
| } |
| } |