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/*
* Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 4915392 8141039
* @summary test that the getAlgorithm() method works correctly
* @author Andreas Sterbenz
* @run main GetAlgorithm
*/
import java.io.*;
import java.security.*;
import java.util.Arrays;
import java.util.List;
public class GetAlgorithm {
private static final String BASE = System.getProperty("test.src", ".");
private static final String DRBG_CONFIG = "securerandom.drbg.config";
private static final String DRBG_CONFIG_VALUE
= Security.getProperty(DRBG_CONFIG);
public static void main(String[] args) throws Exception {
SecureRandom sr = new SecureRandom();
if (sr.getAlgorithm().equals("unknown")) {
throw new Exception("Unknown: " + sr.getAlgorithm());
}
for (String mech : new String[]{supportedNativeAlgo(), "SHA1PRNG",
"Hash_DRBG", "HMAC_DRBG", "CTR_DRBG"}) {
if (!mech.contains("_DRBG")) {
check(mech, SecureRandom.getInstance(mech));
} else {
try {
Security.setProperty(DRBG_CONFIG, mech);
check("DRBG", SecureRandom.getInstance("DRBG"));
} finally {
Security.setProperty(DRBG_CONFIG, DRBG_CONFIG_VALUE);
}
}
}
check("unknown", new MySecureRandom());
InputStream in = new FileInputStream(
new File(BASE, "sha1prng-old.bin"));
ObjectInputStream oin = new ObjectInputStream(in);
sr = (SecureRandom) oin.readObject();
oin.close();
check("unknown", sr);
in = new FileInputStream(new File(BASE, "sha1prng-new.bin"));
oin = new ObjectInputStream(in);
sr = (SecureRandom) oin.readObject();
oin.close();
check("SHA1PRNG", sr);
System.out.println("All tests passed");
}
private static void check(String s1, SecureRandom sr) throws Exception {
String s2 = sr.getAlgorithm();
if (s1.equals(s2) == false) {
throw new Exception("Expected " + s1 + ", got " + s2);
}
}
private static class MySecureRandom extends SecureRandom {
}
/**
* Find the name of supported native mechanism name for current platform.
*/
private static String supportedNativeAlgo() {
String nativeSr = "Windows-PRNG";
try {
SecureRandom.getInstance(nativeSr);
} catch (NoSuchAlgorithmException e) {
nativeSr = "NativePRNG";
}
return nativeSr;
}
}
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