package cz.crcs.ectester.reader.test;

import cz.crcs.ectester.applet.ECTesterApplet;
import cz.crcs.ectester.applet.EC_Consts;
import cz.crcs.ectester.common.ec.EC_Curve;
import cz.crcs.ectester.common.ec.EC_Key;
import cz.crcs.ectester.common.output.TestWriter;
import cz.crcs.ectester.common.test.CompoundTest;
import cz.crcs.ectester.common.test.Result;
import cz.crcs.ectester.common.test.Test;
import cz.crcs.ectester.common.util.CardUtil;
import cz.crcs.ectester.data.EC_Store;
import cz.crcs.ectester.reader.CardMngr;
import cz.crcs.ectester.reader.ECTesterReader;
import cz.crcs.ectester.reader.command.Command;

import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import static cz.crcs.ectester.common.test.Result.ExpectedValue;

/**
 * @author Jan Jancar johny@neuromancer.sk
 */
public class CardCofactorSuite extends CardTestSuite {
    public CardCofactorSuite(TestWriter writer, ECTesterReader.Config cfg, CardMngr cardManager) {
        super(writer, cfg, cardManager, "cofactor", "The cofactor test suite tests whether the card correctly rejects points on the curve but not in the subgroup generated by the generator during ECDH.");
    }

    @Override
    protected void runTests() throws Exception {
        Map<String, EC_Key.Public> pubkeys = EC_Store.getInstance().getObjects(EC_Key.Public.class, "cofactor");
        List<Map.Entry<EC_Curve, List<EC_Key.Public>>> curveList = EC_Store.mapKeyToCurve(pubkeys.values());
        for (Map.Entry<EC_Curve, List<EC_Key.Public>> e : curveList) {
            EC_Curve curve = e.getKey();
            List<EC_Key.Public> keys = e.getValue();

            Test allocate = CommandTest.expect(new Command.Allocate(this.card, ECTesterApplet.KEYPAIR_BOTH, curve.getBits(), curve.getField()), ExpectedValue.SUCCESS);
            Test set = CommandTest.expect(new Command.Set(this.card, ECTesterApplet.KEYPAIR_BOTH, EC_Consts.CURVE_external, curve.getParams(), curve.flatten()), ExpectedValue.SUCCESS);
            Test generate = CommandTest.expect(new Command.Generate(this.card, ECTesterApplet.KEYPAIR_LOCAL), ExpectedValue.SUCCESS);

            Test prepare = CompoundTest.all(ExpectedValue.SUCCESS, "Prepare and generate keypair on " + curve.getId() + ".", allocate, set, generate);

            List<Test> ecdhTests = new LinkedList<>();
            for (EC_Key.Public pub : keys) {
                Test setPub = CommandTest.expect(new Command.Set(this.card, ECTesterApplet.KEYPAIR_REMOTE, EC_Consts.CURVE_external, pub.getParams(), pub.flatten()), Result.ExpectedValue.FAILURE);
                Test ecdh = CommandTest.expect(new Command.ECDH(this.card, ECTesterApplet.KEYPAIR_REMOTE, ECTesterApplet.KEYPAIR_LOCAL, ECTesterApplet.EXPORT_FALSE, EC_Consts.TRANSFORMATION_NONE, EC_Consts.KeyAgreement_ALG_EC_SVDP_DH), Result.ExpectedValue.FAILURE);
                Test objectEcdh = CompoundTest.all(Result.ExpectedValue.SUCCESS, CardUtil.getKATypeString(EC_Consts.KeyAgreement_ALG_EC_SVDP_DH) + " test with degenerate pubkey.", setPub, ecdh);
                Command ecdhCommand = new Command.ECDH_direct(this.card, ECTesterApplet.KEYPAIR_LOCAL, ECTesterApplet.EXPORT_FALSE, EC_Consts.TRANSFORMATION_NONE, EC_Consts.KeyAgreement_ALG_EC_SVDP_DH, pub.flatten());
                Test rawEcdh = CommandTest.expect(ecdhCommand, ExpectedValue.FAILURE, "Card correctly rejected point on non-generator subgroup.", "Card incorrectly accepted point on non-generator subgroup.");
                ecdhTests.add(CompoundTest.all(Result.ExpectedValue.SUCCESS, pub.getId() + " cofactor key test.", objectEcdh, rawEcdh));
            }
            Test ecdh = CompoundTest.all(ExpectedValue.SUCCESS, "Perform ECDH with public points on non-generator subgroup.", ecdhTests.toArray(new Test[0]));

            if (cfg.cleanup) {
                Test cleanup = CommandTest.expect(new Command.Cleanup(this.card), ExpectedValue.ANY);
                doTest(CompoundTest.greedyAllTry(ExpectedValue.SUCCESS, "Cofactor test of " + curve.getId() + ".", prepare, ecdh, cleanup));
            } else {
                doTest(CompoundTest.greedyAllTry(ExpectedValue.SUCCESS, "Cofactor test of " + curve.getId() + ".", prepare, ecdh));
            }
        }
    }
}