| // Copyright 2018 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.subtle; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import com.google.crypto.tink.TestUtil; |
| import com.google.crypto.tink.subtle.Enums.HashType; |
| import java.security.GeneralSecurityException; |
| import java.security.KeyPair; |
| import java.security.KeyPairGenerator; |
| import java.security.Signature; |
| import java.security.interfaces.RSAPrivateCrtKey; |
| import java.security.interfaces.RSAPublicKey; |
| import java.util.TreeSet; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Unit tests for RsaSsaPkcs1SignJce. */ |
| @RunWith(JUnit4.class) |
| public class RsaSsaPkcs1SignJceTest { |
| @Test |
| public void testConstructorExceptions() throws Exception { |
| int keySize = 2048; |
| KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA"); |
| keyGen.initialize(keySize); |
| |
| RSAPrivateCrtKey priv = (RSAPrivateCrtKey) keyGen.generateKeyPair().getPrivate(); |
| try { |
| new RsaSsaPkcs1SignJce(priv, HashType.SHA1); |
| fail("Unsafe hash, should have thrown exception."); |
| } catch (GeneralSecurityException e) { |
| // Expected. |
| TestUtil.assertExceptionContains(e, "SHA1 is not safe"); |
| } |
| } |
| |
| @Test |
| public void testBasicAgainstJce() throws Exception { |
| int keySize = 2048; |
| KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA"); |
| keyGen.initialize(keySize); |
| KeyPair keyPair = keyGen.generateKeyPair(); |
| RSAPublicKey pub = (RSAPublicKey) keyPair.getPublic(); |
| RSAPrivateCrtKey priv = (RSAPrivateCrtKey) keyPair.getPrivate(); |
| |
| // Sign with RsaSsaPkcs1SignJce. |
| String message = "Hello"; |
| RsaSsaPkcs1SignJce signer = new RsaSsaPkcs1SignJce(priv, HashType.SHA256); |
| byte[] signature = signer.sign(message.getBytes("UTF-8")); |
| |
| // Verify with JCE's Signature. |
| Signature verifier = Signature.getInstance("SHA256withRSA"); |
| verifier.initVerify(pub); |
| verifier.update(message.getBytes("UTF-8")); |
| assertTrue(verifier.verify(signature)); |
| } |
| |
| @Test |
| public void testSignWithTheSameMessage() throws Exception { |
| if (TestUtil.isTsan()) { |
| // This test times out when running under thread sanitizer, so we just skip. |
| return; |
| } |
| int keySize = 4096; |
| KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA"); |
| keyGen.initialize(keySize); |
| KeyPair keyPair = keyGen.generateKeyPair(); |
| RSAPrivateCrtKey priv = (RSAPrivateCrtKey) keyPair.getPrivate(); |
| RSAPublicKey pub = (RSAPublicKey) keyPair.getPublic(); |
| |
| byte[] msg = Random.randBytes(20); |
| TreeSet<String> allSignatures = new TreeSet<String>(); |
| RsaSsaPkcs1SignJce signer = new RsaSsaPkcs1SignJce(priv, HashType.SHA512); |
| for (int i = 0; i < 100; i++) { |
| byte[] sig = signer.sign(msg); |
| allSignatures.add(TestUtil.hexEncode(sig)); |
| // Verify with JCE's Signature. |
| Signature verifier = Signature.getInstance("SHA512WithRSA"); |
| verifier.initVerify(pub); |
| verifier.update(msg); |
| if (!verifier.verify(sig)) { |
| fail( |
| String.format( |
| "\n\nMessage: %s\nSignature: %s\nPrivateKey: %s\nPublicKey: %s\n", |
| TestUtil.hexEncode(msg), |
| TestUtil.hexEncode(sig), |
| TestUtil.hexEncode(priv.getEncoded()), |
| TestUtil.hexEncode(pub.getEncoded()))); |
| } |
| } |
| // RSA SSA PKCS1 is deterministic, expect a unique signature for the same message. |
| assertEquals(1, allSignatures.size()); |
| } |
| } |