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/*
* Copyright (C) 2008 The Android Open Source Project
*
* 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.android.org.bouncycastle.crypto.digests;
import junit.framework.TestCase;
import com.android.org.bouncycastle.crypto.Digest;
import com.android.org.bouncycastle.crypto.ExtendedDigest;
import tests.util.SummaryStatistics;
/**
* Implements unit tests for our JNI wrapper around OpenSSL. We use the
* existing Bouncy Castle implementation as our test oracle.
*/
public class DigestTest extends TestCase {
/**
* Processes the two given message digests for the same data and checks
* the results. Requirement is that the results must be equal, the digest
* implementations must have the same properties, and the new implementation
* must be faster than the old one.
*
* @param oldDigest The old digest implementation, provided by Bouncy Castle
* @param newDigest The new digest implementation, provided by OpenSSL
*/
public void doTestMessageDigest(Digest oldDigest, Digest newDigest) {
final int WARMUP = 10;
final int ITERATIONS = 100;
byte[] data = new byte[1024];
byte[] oldHash = new byte[oldDigest.getDigestSize()];
byte[] newHash = new byte[newDigest.getDigestSize()];
assertEquals("Hash names must be equal",
oldDigest.getAlgorithmName(), newDigest.getAlgorithmName());
assertEquals("Hash sizes must be equal",
oldHash.length, newHash.length);
assertEquals("Hash block sizes must be equal",
((ExtendedDigest)oldDigest).getByteLength(),
((ExtendedDigest)newDigest).getByteLength());
for (int i = 0; i < data.length; i++) {
data[i] = (byte)i;
}
SummaryStatistics oldTime = new SummaryStatistics();
SummaryStatistics newTime = new SummaryStatistics();
for (int j = 0; j < ITERATIONS + WARMUP; j++) {
long t0 = System.nanoTime();
for (int i = 0; i < 4; i++) {
oldDigest.update(data, 0, data.length);
}
int oldLength = oldDigest.doFinal(oldHash, 0);
long t1 = System.nanoTime();
if (j >= WARMUP) {
oldTime.add(t1 - t0);
}
long t2 = System.nanoTime();
for (int i = 0; i < 4; i++) {
newDigest.update(data, 0, data.length);
}
int newLength = newDigest.doFinal(newHash, 0);
long t3 = System.nanoTime();
if (j >= WARMUP) {
newTime.add(t3 - t2);
}
assertEquals("Hash sizes must be equal", oldLength, newLength);
for (int i = 0; i < oldLength; i++) {
assertEquals("Hashes[" + i + "] must be equal", oldHash[i], newHash[i]);
}
}
System.out.println("Time for " + ITERATIONS + " x old hash processing: "
+ oldTime.toString());
System.out.println("Time for " + ITERATIONS + " x new hash processing: "
+ newTime.toString());
assertTrue("New hash should be faster:\nold=" + oldTime.toString() + "\nnew="
+ newTime.toString(), newTime.mean() < oldTime.mean());
}
/**
* Tests the MD5 implementation.
*/
public void testMD5() {
Digest oldDigest = new MD5Digest();
Digest newDigest = new OpenSSLDigest.MD5();
doTestMessageDigest(oldDigest, newDigest);
}
/**
* Tests the SHA-1 implementation.
*/
public void testSHA1() {
Digest oldDigest = new SHA1Digest();
Digest newDigest = new OpenSSLDigest.SHA1();
doTestMessageDigest(oldDigest, newDigest);
}
/**
* Tests the SHA-256 implementation.
*/
public void testSHA256() {
Digest oldDigest = new SHA256Digest();
Digest newDigest = new OpenSSLDigest.SHA256();
doTestMessageDigest(oldDigest, newDigest);
}
/**
* Tests the SHA-384 implementation.
*/
public void testSHA384() {
Digest oldDigest = new SHA384Digest();
Digest newDigest = new OpenSSLDigest.SHA384();
doTestMessageDigest(oldDigest, newDigest);
}
/**
* Tests the SHA-512 implementation.
*/
public void testSHA512() {
Digest oldDigest = new SHA512Digest();
Digest newDigest = new OpenSSLDigest.SHA512();
doTestMessageDigest(oldDigest, newDigest);
}
}
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