8051408: NIST SP 800-90A SecureRandom implementations
Reviewed-by: wetmore, xuelei, coffeys
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/* @test
* @bug 8051408
* @summary Make sure DrbgParameters coded as specified
* @library /test/lib/share/classes
*/
import jdk.test.lib.Asserts;
import java.security.DrbgParameters;
import java.util.Arrays;
import static java.security.DrbgParameters.Capability.*;
public class DrbgParametersSpec {
public static void main(String args[]) throws Exception {
byte[] p, np1, np2;
// Capability
Asserts.assertTrue(PR_AND_RESEED.supportsPredictionResistance());
Asserts.assertTrue(PR_AND_RESEED.supportsReseeding());
Asserts.assertFalse(RESEED_ONLY.supportsPredictionResistance());
Asserts.assertTrue(RESEED_ONLY.supportsReseeding());
Asserts.assertFalse(NONE.supportsPredictionResistance());
Asserts.assertFalse(NONE.supportsReseeding());
// Instantiation
p = "Instantiation".getBytes();
DrbgParameters.Instantiation ins = DrbgParameters
.instantiation(192, RESEED_ONLY, p);
Asserts.assertTrue(ins.getStrength() == 192);
Asserts.assertTrue(ins.getCapability() == RESEED_ONLY);
np1 = ins.getPersonalizationString();
np2 = ins.getPersonalizationString();
// Getter outputs have same content but not the same object
Asserts.assertTrue(Arrays.equals(np1, p));
Asserts.assertTrue(Arrays.equals(np2, p));
Asserts.assertNE(np1, np2);
// Changes to original input has no affect on object
p[0] = 'X';
np2 = ins.getPersonalizationString();
Asserts.assertTrue(Arrays.equals(np1, np2));
ins = DrbgParameters.instantiation(-1, NONE, null);
Asserts.assertNull(ins.getPersonalizationString());
// NextBytes
p = "NextBytes".getBytes();
DrbgParameters.NextBytes nb = DrbgParameters
.nextBytes(192, true, p);
Asserts.assertTrue(nb.getStrength() == 192);
Asserts.assertTrue(nb.getPredictionResistance());
np1 = nb.getAdditionalInput();
np2 = nb.getAdditionalInput();
// Getter outputs have same content but not the same object
Asserts.assertTrue(Arrays.equals(np1, p));
Asserts.assertTrue(Arrays.equals(np2, p));
Asserts.assertNE(np1, np2);
// Changes to original input has no affect on object
p[0] = 'X';
np2 = nb.getAdditionalInput();
Asserts.assertTrue(Arrays.equals(np1, np2));
// Reseed
p = "Reseed".getBytes();
DrbgParameters.Reseed rs = DrbgParameters
.reseed(true, p);
Asserts.assertTrue(rs.getPredictionResistance());
np1 = rs.getAdditionalInput();
np2 = rs.getAdditionalInput();
// Getter outputs have same content but not the same object
Asserts.assertTrue(Arrays.equals(np1, p));
Asserts.assertTrue(Arrays.equals(np2, p));
Asserts.assertNE(np1, np2);
// Changes to original input has no affect on object
p[0] = 'X';
np2 = rs.getAdditionalInput();
Asserts.assertTrue(Arrays.equals(np1, np2));
}
}