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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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 * You should have received a copy of the GNU General Public License version

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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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/*

 * @test

 * @summary test ASN.1 encoding generation/parsing for the OAEPParameters

 * implementation in SunJCE provider.

 * @author Valerie Peng

 */

import java.math.BigInteger;

import java.util.*;

import java.security.*;

import java.security.spec.MGF1ParameterSpec;

import javax.crypto.*;

import javax.crypto.spec.OAEPParameterSpec;

import javax.crypto.spec.PSource;

public class TestOAEPParameterSpec {

    private static Provider cp;

    private static boolean runTest(String mdName, MGF1ParameterSpec mgfSpec,

        byte[] p) throws Exception {

        OAEPParameterSpec spec = new OAEPParameterSpec(mdName, "MGF1",

            mgfSpec, new PSource.PSpecified(p));

        cp = Security.getProvider("SunJCE");

        System.out.println("Testing provider " + cp.getName() + "...");

        AlgorithmParameters ap = AlgorithmParameters.getInstance("OAEP", cp);

        ap.init(spec);

        byte[] encoding = ap.getEncoded();

        AlgorithmParameters ap2 = AlgorithmParameters.getInstance("OAEP", cp);

        ap2.init(encoding);

        OAEPParameterSpec spec2 = (OAEPParameterSpec) ap2.getParameterSpec

                (OAEPParameterSpec.class);

        return compareSpec(spec, spec2);

    }

    private static boolean compareMD(OAEPParameterSpec s1,

        OAEPParameterSpec s2) {

        boolean result = false;

        String alg1 = s1.getDigestAlgorithm().toUpperCase().trim();

        String alg2 = s2.getDigestAlgorithm().toUpperCase().trim();

        alg1 = alg1.replaceAll("\\-", "");

        alg2 = alg2.replaceAll("\\-", "");

        if (alg1.equals("SHA") || alg1.equals("SHA1")) {

            result = (alg2.equals("SHA") || alg2.equals("SHA1"));

        } else {

            result = (alg1.equals(alg2));

        }

        return result;

    }

    private static boolean compareMGF(OAEPParameterSpec s1,

        OAEPParameterSpec s2) {

        String alg1 = s1.getMGFAlgorithm();

        String alg2 = s2.getMGFAlgorithm();

        if (alg1.equals(alg2)) {

            MGF1ParameterSpec mp1 = (MGF1ParameterSpec)s1.getMGFParameters();

            MGF1ParameterSpec mp2 = (MGF1ParameterSpec)s2.getMGFParameters();

            alg1 = mp1.getDigestAlgorithm();

            alg2 = mp2.getDigestAlgorithm();

            if (alg1.equals(alg2)) {

                return true;

            } else {

                System.out.println("MGF's MD algos: " + alg1 + " vs " + alg2);

                return false;

            }

        } else {

            System.out.println("MGF algos: " + alg1 + " vs " + alg2);

            return false;

        }

    }

    private static boolean comparePSource(OAEPParameterSpec s1,

        OAEPParameterSpec s2) {

        PSource src1 = s1.getPSource();

        PSource src2 = s2.getPSource();

        String alg1 = src1.getAlgorithm();

        String alg2 = src2.getAlgorithm();

        if (alg1.equals(alg2)) {

            // assumes they are PSource.PSpecified

            return Arrays.equals(((PSource.PSpecified) src1).getValue(),

                ((PSource.PSpecified) src2).getValue());

        } else {

            System.out.println("PSource algos: " + alg1 + " vs " + alg2);

            return false;

        }

    }

    private static boolean compareSpec(OAEPParameterSpec s1,

        OAEPParameterSpec s2) {

        return (compareMD(s1, s2) && compareMGF(s1, s2) &&

                comparePSource(s1, s2));

    }

    public static void main(String[] argv) throws Exception {

        boolean status = true;

        byte[] p = { (byte) 0x01, (byte) 0x02, (byte) 0x03, (byte) 0x04 };

        status &= runTest("SHA-224", MGF1ParameterSpec.SHA224, p);

        status &= runTest("SHA-256", MGF1ParameterSpec.SHA256, p);

        status &= runTest("SHA-384", MGF1ParameterSpec.SHA384, p);

        status &= runTest("SHA-512", MGF1ParameterSpec.SHA512, p);

        status &= runTest("SHA", MGF1ParameterSpec.SHA1, new byte[0]);

        status &= runTest("SHA-1", MGF1ParameterSpec.SHA1, new byte[0]);

        status &= runTest("SHA1", MGF1ParameterSpec.SHA1, new byte[0]);

        if (status) {

            System.out.println("Test Passed");

        } else {

            throw new Exception("One or More Test Failed");

        }

    }

}