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*
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* 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
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
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/*
* @test
* @bug 4800108
* @summary verify that precomputed DSA parameters are always used (512, 768, 1024, 2048 bit)
* @run main/othervm/timeout=15 TestKeyPairGenerator
*/
// this fix is really a performance fix, so this test is not foolproof
// without it, it will take a minute or more (unless you have a very fast machine)
// with the fix, the test should complete in <2 seconds
// use 15 second timeout to leave some room
import java.security.*;
import java.security.interfaces.*;
public class TestKeyPairGenerator {
private static void checkKeyLength(KeyPair kp, int len) throws Exception {
DSAPublicKey key = (DSAPublicKey)kp.getPublic();
int n = key.getParams().getP().bitLength();
System.out.println("Key length: " + n);
if (len != n) {
throw new Exception("Wrong key length");
}
}
public static void main(String[] args) throws Exception {
long start = System.currentTimeMillis();
KeyPairGenerator kpg;
KeyPair kp;
// problem was when not calling initialize()
// do that twice to artifically inflate the time
// on JDKs that do not have the fix
kpg = KeyPairGenerator.getInstance("DSA", "SUN");
kp = kpg.generateKeyPair();
checkKeyLength(kp, 1024);
kpg = KeyPairGenerator.getInstance("DSA", "SUN");
kp = kpg.generateKeyPair();
checkKeyLength(kp, 1024);
// some other basic tests
kp = kpg.generateKeyPair();
checkKeyLength(kp, 1024);
kpg.initialize(1024);
kp = kpg.generateKeyPair();
checkKeyLength(kp, 1024);
kpg.initialize(768);
kp = kpg.generateKeyPair();
checkKeyLength(kp, 768);
kpg.initialize(512);
kp = kpg.generateKeyPair();
checkKeyLength(kp, 512);
kpg.initialize(2048);
kp = kpg.generateKeyPair();
checkKeyLength(kp, 2048);
long stop = System.currentTimeMillis();
System.out.println("Time: " + (stop - start) + " ms.");
}
}