110 lines
4.5 KiB
Java
110 lines
4.5 KiB
Java
/*
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* Copyright (c) 2021, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8272385
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* @summary Enforce ECPrivateKey d value to be in the range [1, n-1] for SunEC provider
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* @run main ECDSAPrvGreaterThanOrder
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*/
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import javax.crypto.KeyAgreement;
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import java.math.BigInteger;
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import java.security.*;
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import java.security.interfaces.ECPrivateKey;
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import java.security.spec.ECGenParameterSpec;
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import java.security.spec.ECParameterSpec;
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import java.security.spec.ECPrivateKeySpec;
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import java.util.List;
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public class ECDSAPrvGreaterThanOrder {
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private static final List<String> CURVE_NAMES =
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List.of("secp256r1", "secp384r1", "secp521r1");
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public static void main(String[] args) throws Exception {
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for (String curveName : CURVE_NAMES) {
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ECPrivateKey ecPrivKey = makePrivateKey(curveName);
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// Check using the private key for creating a digital signature
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Signature sig = null;
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KeyAgreement ka = null;
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try {
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sig = Signature.getInstance("SHA256withECDSA",
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System.getProperty("test.provider.name", "SunEC"));
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sig.initSign(ecPrivKey);
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throw new RuntimeException("Expected exception for " +
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"ECDSA/" + sig.getAlgorithm() + "/" + curveName +
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" not thrown.");
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} catch (InvalidKeyException ike) {
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// We are expecting this to be caught
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System.out.println("Caught expected exception for " +
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"ECDSA/" + sig.getAlgorithm() + "/" + curveName +
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": " + ike);
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}
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// Next, try starting a ECDH operation
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try {
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ka = KeyAgreement.getInstance("ECDH",
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System.getProperty("test.provider.name", "SunEC"));
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ka.init(ecPrivKey);
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throw new RuntimeException("Expected exception for ECDH/" +
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curveName + " not thrown.");
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} catch (InvalidKeyException ike) {
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// We are expecting this to be caught
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System.out.println("Caught expected exception for ECDH/" +
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curveName + ": " + ike);
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}
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}
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}
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private static ECPrivateKey makePrivateKey(String curveName) {
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try {
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System.out.println("Creating private key for curve " + curveName);
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AlgorithmParameters params = AlgorithmParameters.getInstance(
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"EC", System.getProperty("test.provider.name", "SunEC"));
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params.init(new ECGenParameterSpec(curveName));
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ECParameterSpec ecParameters = params.getParameterSpec(
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ECParameterSpec.class);
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BigInteger order = ecParameters.getOrder(); // the N value
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System.out.println("Order is: " + order);
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// Create a private key value (d) that is outside the range
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// [1, N-1]
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BigInteger dVal = order.add(BigInteger.TWO);
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System.out.println("Modified d Value is: " + dVal);
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// Create the private key
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KeyFactory kf = KeyFactory.getInstance("EC",
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System.getProperty("test.provider.name", "SunEC"));
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return (ECPrivateKey)kf.generatePrivate(
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new ECPrivateKeySpec(dVal, ecParameters));
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} catch (GeneralSecurityException gse) {
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throw new RuntimeException("Unexpected error creating private key",
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gse);
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}
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}
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}
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