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/*
* Copyright (c) 2020, 2024, 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 8216012
* @library /test/lib
* @summary Tests the RSA public key exponent for KeyPairGenerator
* @run main/timeout=60 TestKeyPairGeneratorExponent
*/
import java.math.BigInteger;
import java.security.*;
import java.security.interfaces.*;
import java.security.spec.*;
import jdk.test.lib.security.SecurityUtils;
public class TestKeyPairGeneratorExponent {
private static final String KPG_ALGORITHM = "RSA";
private static final int KEY_LENGTH = SecurityUtils.getTestKeySize(KPG_ALGORITHM);
private static BigInteger[] validExponents = new BigInteger[] {
RSAKeyGenParameterSpec.F0,
RSAKeyGenParameterSpec.F4,
BigInteger.ONE.shiftLeft(KEY_LENGTH - 1).subtract(BigInteger.ONE)
};
private static BigInteger[] invalidExponents = new BigInteger[] {
BigInteger.valueOf(-1),
BigInteger.ZERO,
BigInteger.ONE,
// without this fix, an even value causes an infinite loop
BigInteger.valueOf(4)
};
public static void testValidExponents(KeyPairGenerator kpg,
BigInteger exponent) {
System.out.println("Testing exponent = " + exponent.toString(16));
try {
kpg.initialize(new RSAKeyGenParameterSpec(KEY_LENGTH, exponent));
kpg.generateKeyPair();
System.out.println("OK, key pair generated");
} catch(InvalidAlgorithmParameterException iape){
throw new RuntimeException("Error: Unexpected Exception: " + iape);
}
}
public static void testInvalidExponents(KeyPairGenerator kpg,
BigInteger exponent) {
System.out.println("Testing exponent = " + exponent.toString(16));
try {
kpg.initialize(new RSAKeyGenParameterSpec(KEY_LENGTH, exponent));
kpg.generateKeyPair();
throw new RuntimeException("Error: Expected IAPE not thrown.");
} catch(InvalidAlgorithmParameterException iape){
// Expected InvalidAlgorithmParameterException was thrown
System.out.println("OK, expected IAPE thrown");
} catch(Exception e) {
e.printStackTrace();
throw new RuntimeException("Error: unexpected exception " + e);
}
}
public static void main(String[] args) throws Exception {
KeyPairGenerator kpg =
KeyPairGenerator.getInstance(KPG_ALGORITHM,
System.getProperty("test.provider.name", "SunRsaSign"));
for(BigInteger validExponent : validExponents) {
testValidExponents(kpg, validExponent);
}
for(BigInteger invalidExponent : invalidExponents) {
testInvalidExponents(kpg, invalidExponent);
}
}
}
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