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/*
* Copyright (C) 2012 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 libcore.java.security;
import java.security.Provider;
import java.security.SecureRandom;
import java.security.Security;
import java.util.Arrays;
import java.util.Set;
import junit.framework.TestCase;
public class SecureRandomTest extends TestCase {
private static final String EXPECTED_PROVIDER = "com.android.org.conscrypt.OpenSSLProvider";
private static final byte[] STATIC_SEED_BYTES = new byte[] {
0x0A, (byte) 0xA0, 0x01, 0x10, (byte) 0xFF, (byte) 0xF0, 0x0F
};
private static final long STATIC_SEED_LONG = 8506210602917522860L;
public void test_getInstance() throws Exception {
Provider[] providers = Security.getProviders();
for (Provider provider : providers) {
Set<Provider.Service> services = provider.getServices();
for (Provider.Service service : services) {
String type = service.getType();
if (!type.equals("SecureRandom")) {
continue;
}
String algorithm = service.getAlgorithm();
try {
SecureRandom sr1 = SecureRandom.getInstance(algorithm);
assertEquals(algorithm, sr1.getAlgorithm());
test_SecureRandom(sr1);
// SecureRandom.getInstance(String, Provider)
SecureRandom sr2 = SecureRandom.getInstance(algorithm, provider);
assertEquals(algorithm, sr2.getAlgorithm());
assertEquals(provider, sr2.getProvider());
test_SecureRandom(sr2);
// SecureRandom.getInstance(String, String)
SecureRandom sr3 = SecureRandom.getInstance(algorithm, provider.getName());
assertEquals(algorithm, sr3.getAlgorithm());
assertEquals(provider, sr3.getProvider());
test_SecureRandom(sr3);
System.out.println("SecureRandomTest " + algorithm + " and provider "
+ provider.getName());
} catch (Exception e) {
throw new Exception("Problem testing SecureRandom." + algorithm
+ ", provider: " + provider.getName(), e);
}
}
}
}
private void test_SecureRandom(SecureRandom sr) throws Exception {
byte[] out1 = new byte[20];
byte[] out2 = new byte[20];
sr.nextBytes(out1);
sr.nextBytes(out2);
assertFalse(Arrays.equals(out1, out2));
byte[] seed1 = sr.generateSeed(20);
byte[] seed2 = sr.generateSeed(20);
assertFalse(Arrays.equals(seed1, seed2));
sr.setSeed(STATIC_SEED_BYTES);
sr.nextBytes(out1);
sr.nextBytes(out2);
assertFalse(Arrays.equals(out1, out2));
sr.setSeed(STATIC_SEED_LONG);
sr.nextBytes(out1);
sr.nextBytes(out2);
assertFalse(Arrays.equals(out1, out2));
}
public void testGetCommonInstances_Success() throws Exception {
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
assertNotNull(sr);
assertEquals(EXPECTED_PROVIDER, sr.getProvider().getClass().getName());
}
public void testNewConstructors_Success() throws Exception {
SecureRandom sr1 = new SecureRandom();
assertNotNull(sr1.getProvider());
assertEquals(EXPECTED_PROVIDER, sr1.getProvider().getClass().getName());
test_SecureRandom(sr1);
SecureRandom sr2 = new SecureRandom(STATIC_SEED_BYTES);
assertEquals(EXPECTED_PROVIDER, sr2.getProvider().getClass().getName());
test_SecureRandom(sr2);
}
}
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