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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* 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.
*
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*/
/*
* @test
* @bug 7044060
* @summary verify that DSA parameter generation works
* @run main/othervm/timeout=300 TestAlgParameterGenerator
*/
import java.security.*;
import java.security.spec.*;
import java.security.interfaces.*;
public class TestAlgParameterGenerator {
private static void checkParamStrength(AlgorithmParameters param,
int strength) throws Exception {
String algo = param.getAlgorithm();
if (!algo.equalsIgnoreCase("DSA")) {
throw new Exception("Unexpected type of parameters: " + algo);
}
DSAParameterSpec spec = param.getParameterSpec(DSAParameterSpec.class);
int valueL = spec.getP().bitLength();
if (strength != valueL) {
System.out.println("Expected " + strength + " but actual " + valueL);
throw new Exception("Wrong P strength");
}
}
private static void checkParamStrength(AlgorithmParameters param,
DSAGenParameterSpec genParam)
throws Exception {
String algo = param.getAlgorithm();
if (!algo.equalsIgnoreCase("DSA")) {
throw new Exception("Unexpected type of parameters: " + algo);
}
DSAParameterSpec spec = param.getParameterSpec(DSAParameterSpec.class);
int valueL = spec.getP().bitLength();
int strength = genParam.getPrimePLength();
if (strength != valueL) {
System.out.println("P: Expected " + strength + " but actual " + valueL);
throw new Exception("Wrong P strength");
}
int valueN = spec.getQ().bitLength();
strength = genParam.getSubprimeQLength();
if (strength != valueN) {
System.out.println("Q: Expected " + strength + " but actual " + valueN);
throw new Exception("Wrong Q strength");
}
}
public static void main(String[] args) throws Exception {
AlgorithmParameterGenerator apg =
AlgorithmParameterGenerator.getInstance("DSA", "SUN");
long start, stop;
// make sure no-init still works
start = System.currentTimeMillis();
AlgorithmParameters param = apg.generateParameters();
stop = System.currentTimeMillis();
System.out.println("Time: " + (stop - start) + " ms.");
checkParamStrength(param, 1024);
// make sure the old model works
int[] strengths = { 512, 768, 1024 };
for (int i = 0; i < strengths.length; i++) {
int sizeP = strengths[i];
System.out.println("Generating " + sizeP + "-bit DSA Parameters");
start = System.currentTimeMillis();
apg.init(sizeP);
param = apg.generateParameters();
stop = System.currentTimeMillis();
System.out.println("Time: " + (stop - start) + " ms.");
checkParamStrength(param, sizeP);
}
// now the newer model
DSAGenParameterSpec spec1 = new DSAGenParameterSpec(1024, 160);
DSAGenParameterSpec spec2 = new DSAGenParameterSpec(2048, 224);
DSAGenParameterSpec spec3 = new DSAGenParameterSpec(2048, 256);
//DSAGenParameterSpec spec4 = new DSAGenParameterSpec(3072, 256);
DSAGenParameterSpec[] specSet = {
spec1, spec2, spec3//, spec4
};
for (int i = 0; i < specSet.length; i++) {
DSAGenParameterSpec genParam = specSet[i];
System.out.println("Generating (" + genParam.getPrimePLength() +
", " + genParam.getSubprimeQLength() +
") DSA Parameters");
start = System.currentTimeMillis();
apg.init(genParam, null);
param = apg.generateParameters();
stop = System.currentTimeMillis();
System.out.println("Time: " + (stop - start) + " ms.");
checkParamStrength(param, genParam);
}
}
}