102 lines
4.0 KiB
Java
102 lines
4.0 KiB
Java
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/*
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* Copyright (c) 2016, 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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import java.security.*;
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/*
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* @test
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* @bug 8161571
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* @summary Reject signatures presented for verification that contain extra
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* bytes.
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* @run main SignatureLength
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*/
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public class SignatureLength {
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public static void main(String[] args) throws Exception {
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main0("EC", 256, "SHA256withECDSA", "SunEC");
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main0("RSA", 2048, "SHA256withRSA", "SunRsaSign");
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main0("DSA", 2048, "SHA256withDSA", "SUN");
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if (System.getProperty("os.name").equals("SunOS")) {
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main0("EC", 256, "SHA256withECDSA", null);
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main0("RSA", 2048, "SHA256withRSA", null);
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}
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}
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private static void main0(String keyAlgorithm, int keysize,
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String signatureAlgorithm, String provider) throws Exception {
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byte[] plaintext = "aaa".getBytes("UTF-8");
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// Generate
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KeyPairGenerator generator =
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provider == null ?
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(KeyPairGenerator) KeyPairGenerator.getInstance(keyAlgorithm) :
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(KeyPairGenerator) KeyPairGenerator.getInstance(
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keyAlgorithm, provider);
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generator.initialize(keysize);
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System.out.println("Generating " + keyAlgorithm + " keypair using " +
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generator.getProvider().getName() + " JCE provider");
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KeyPair keypair = generator.generateKeyPair();
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// Sign
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Signature signer =
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provider == null ?
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Signature.getInstance(signatureAlgorithm) :
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Signature.getInstance(signatureAlgorithm, provider);
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signer.initSign(keypair.getPrivate());
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signer.update(plaintext);
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System.out.println("Signing using " + signer.getProvider().getName() +
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" JCE provider");
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byte[] signature = signer.sign();
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// Invalidate
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System.out.println("Invalidating signature ...");
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byte[] badSignature = new byte[signature.length + 5];
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System.arraycopy(signature, 0, badSignature, 0, signature.length);
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badSignature[signature.length] = 0x01;
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badSignature[signature.length + 1] = 0x01;
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badSignature[signature.length + 2] = 0x01;
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badSignature[signature.length + 3] = 0x01;
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badSignature[signature.length + 4] = 0x01;
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// Verify
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Signature verifier =
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provider == null ?
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Signature.getInstance(signatureAlgorithm) :
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Signature.getInstance(signatureAlgorithm, provider);
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verifier.initVerify(keypair.getPublic());
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verifier.update(plaintext);
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System.out.println("Verifying using " +
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verifier.getProvider().getName() + " JCE provider");
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try {
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System.out.println("Valid? " + verifier.verify(badSignature));
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throw new Exception(
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"ERROR: expected a SignatureException but none was thrown");
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} catch (SignatureException e) {
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System.out.println("OK: caught expected exception: " + e);
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}
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System.out.println();
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}
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}
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