diff options
Diffstat (limited to 'src/cz/crcs/ectester/reader/test/CardCompositeSuite.java')
| -rw-r--r-- | src/cz/crcs/ectester/reader/test/CardCompositeSuite.java | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/cz/crcs/ectester/reader/test/CardCompositeSuite.java b/src/cz/crcs/ectester/reader/test/CardCompositeSuite.java new file mode 100644 index 0000000..0d4d2e0 --- /dev/null +++ b/src/cz/crcs/ectester/reader/test/CardCompositeSuite.java @@ -0,0 +1,98 @@ +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.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 CardCompositeSuite extends CardTestSuite { + + public CardCompositeSuite(TestWriter writer, ECTesterReader.Config cfg, CardMngr cardManager) { + super(writer, cfg, cardManager, "composite", "The composite suite runs ECDH over curves with composite order. This should generally fail, as using such a curve is unsafe."); + } + + @Override + protected void runTests() throws Exception { + /* Do the default run with the public keys set to provided smallorder keys + * over composite order curves. Essentially small subgroup attacks. + * These should fail, the curves aren't safe so that if the computation with + * a small order public key succeeds the private key modulo the public key order + * is revealed. + */ + Map<String, EC_Key> keys = EC_Store.getInstance().getObjects(EC_Key.class, "composite"); + List<Map.Entry<EC_Curve, List<EC_Key>>> mappedKeys = EC_Store.mapKeyToCurve(keys.values()); + for (Map.Entry<EC_Curve, List<EC_Key>> curveKeys : mappedKeys) { + EC_Curve curve = curveKeys.getKey(); + List<Test> tests = new LinkedList<>(); + Test allocate = runTest(CommandTest.expect(new Command.Allocate(this.card, ECTesterApplet.KEYPAIR_LOCAL, curve.getBits(), curve.getField()), ExpectedValue.SUCCESS)); + if (!allocate.ok()) { + doTest(CompoundTest.all(ExpectedValue.SUCCESS, "No support for " + curve.getBits() + "b " + CardUtil.getKeyTypeString(curve.getField()) + ".", allocate)); + continue; + } + tests.add(allocate); + for (EC_Key key : curveKeys.getValue()) { + Test set = CommandTest.expect(new Command.Set(this.card, ECTesterApplet.KEYPAIR_LOCAL, EC_Consts.CURVE_external, curve.getParams(), curve.flatten()), ExpectedValue.ANY); + Test generate = CommandTest.expect(new Command.Generate(this.card, ECTesterApplet.KEYPAIR_LOCAL), ExpectedValue.ANY); + 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, key.flatten()); + Test ecdh = CommandTest.expect(ecdhCommand, ExpectedValue.FAILURE, "Card correctly rejected to do ECDH over a composite order curve.", "Card incorrectly does ECDH over a composite order curve, leaks bits of private key."); + + tests.add(CompoundTest.greedyAllTry(ExpectedValue.SUCCESS, "Composite test of " + curve.getId() + ", " + key.getDesc(), set, generate, ecdh)); + } + doTest(CompoundTest.all(ExpectedValue.SUCCESS, "Composite test of " + curve.getId() + ".", tests.toArray(new Test[0]))); + new Command.Cleanup(this.card).send(); + } + + /* Also test having a G of small order, so small R. + */ + Map<String, EC_Curve> results = EC_Store.getInstance().getObjects(EC_Curve.class, "composite"); + List<Map.Entry<String, List<EC_Curve>>> groupList = EC_Store.mapToPrefix(results.values()); + List<EC_Curve> smallRCurves = groupList.stream().filter((e) -> e.getKey().equals("small")).findFirst().get().getValue(); + testGroup(smallRCurves, "Small generator order", ExpectedValue.FAILURE, "Card correctly rejected to do ECDH over a small order generator.", "Card incorrectly does ECDH over a small order generator."); + + /* Also test having a G of large but composite order, R = p * q, + */ + List<EC_Curve> pqCurves = groupList.stream().filter((e) -> e.getKey().equals("pq")).findFirst().get().getValue(); + testGroup(pqCurves, null, ExpectedValue.ANY, "", ""); + + /* Also test rg0 curves. + */ + List<EC_Curve> rg0Curves = groupList.stream().filter((e) -> e.getKey().equals("rg0")).findFirst().get().getValue(); + testGroup(rg0Curves, null, ExpectedValue.ANY, "", ""); + } + + private void testGroup(List<EC_Curve> curves, String testName, ExpectedValue dhValue, String ok, String nok) throws Exception { + for (EC_Curve curve : curves) { + 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.ANY); + Test generate = CommandTest.expect(new Command.Generate(this.card, ECTesterApplet.KEYPAIR_BOTH), ExpectedValue.ANY); + Test ecdh = CommandTest.expect(new Command.ECDH(this.card, ECTesterApplet.KEYPAIR_LOCAL, ECTesterApplet.KEYPAIR_REMOTE, ECTesterApplet.EXPORT_FALSE, EC_Consts.TRANSFORMATION_NONE, EC_Consts.KeyAgreement_ALG_EC_SVDP_DH), dhValue, ok, nok); + + String description; + if (testName == null) { + description = curve.getDesc() + " test of " + curve.getId() + "."; + } else { + description = testName + " test of " + curve.getId() + "."; + } + doTest(CompoundTest.greedyAllTry(ExpectedValue.SUCCESS, description, allocate, set, generate, ecdh)); + new Command.Cleanup(this.card).send(); + } + + } +} |