/*
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* Copyright (C) 2010 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package benchmarks.regression;
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import com.google.caliper.BeforeExperiment;
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import com.google.caliper.Param;
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import java.security.KeyPair;
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import java.security.KeyPairGenerator;
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import java.security.PrivateKey;
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import java.security.PublicKey;
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import java.security.Signature;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* Tests RSA and DSA signature creation and verification.
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*/
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public class SignatureBenchmark {
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private static final int DATA_SIZE = 8192;
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private static final byte[] DATA = new byte[DATA_SIZE];
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static {
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for (int i = 0; i < DATA_SIZE; i++) {
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DATA[i] = (byte)i;
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}
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}
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@Param private Algorithm algorithm;
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public enum Algorithm {
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MD5WithRSA,
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SHA1WithRSA,
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SHA256WithRSA,
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SHA384WithRSA,
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SHA512WithRSA,
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SHA1withDSA
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};
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@Param private Implementation implementation;
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public enum Implementation { OpenSSL, BouncyCastle };
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// Key generation and signing aren't part of the benchmark for verification
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// so cache the results
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private static Map<String,KeyPair> KEY_PAIRS = new HashMap<String,KeyPair>();
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private static Map<String,byte[]> SIGNATURES = new HashMap<String,byte[]>();
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private String signatureAlgorithm;
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private byte[] signature;
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private PrivateKey privateKey;
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private PublicKey publicKey;
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@BeforeExperiment
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protected void setUp() throws Exception {
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this.signatureAlgorithm = algorithm.toString();
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String keyAlgorithm = signatureAlgorithm.substring(signatureAlgorithm.length() - 3 ,
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signatureAlgorithm.length());
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KeyPair keyPair = KEY_PAIRS.get(keyAlgorithm);
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if (keyPair == null) {
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KeyPairGenerator generator = KeyPairGenerator.getInstance(keyAlgorithm);
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keyPair = generator.generateKeyPair();
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KEY_PAIRS.put(keyAlgorithm, keyPair);
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}
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this.privateKey = keyPair.getPrivate();
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this.publicKey = keyPair.getPublic();
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this.signature = SIGNATURES.get(signatureAlgorithm);
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if (this.signature == null) {
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Signature signer = Signature.getInstance(signatureAlgorithm);
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signer.initSign(keyPair.getPrivate());
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signer.update(DATA);
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this.signature = signer.sign();
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SIGNATURES.put(signatureAlgorithm, signature);
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}
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}
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public void timeSign(int reps) throws Exception {
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for (int i = 0; i < reps; ++i) {
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Signature signer;
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switch (implementation) {
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case OpenSSL:
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signer = Signature.getInstance(signatureAlgorithm, "AndroidOpenSSL");
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break;
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case BouncyCastle:
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signer = Signature.getInstance(signatureAlgorithm, "BC");
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break;
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default:
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throw new RuntimeException(implementation.toString());
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}
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signer.initSign(privateKey);
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signer.update(DATA);
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signer.sign();
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}
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}
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public void timeVerify(int reps) throws Exception {
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for (int i = 0; i < reps; ++i) {
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Signature verifier;
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switch (implementation) {
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case OpenSSL:
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verifier = Signature.getInstance(signatureAlgorithm, "AndroidOpenSSL");
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break;
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case BouncyCastle:
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verifier = Signature.getInstance(signatureAlgorithm, "BC");
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break;
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default:
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throw new RuntimeException(implementation.toString());
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}
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verifier.initVerify(publicKey);
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verifier.update(DATA);
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verifier.verify(signature);
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}
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}
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}
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