test/java/security/Signature/VerifyRangeCheckOverflow.java

/*
 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * Portions Copyright (c) 2012 IBM Corporation
 */

/* @test
 * @bug 7172149
 * @summary AIOOBE from Signature.verify after integer overflow
 * @author Jonathan Lu
 */

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PublicKey;
import java.security.Signature;

public class VerifyRangeCheckOverflow {

    public static void main(String[] args) throws Exception {
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("DSA");
        keyPairGenerator.initialize(1024);
        KeyPair keys = keyPairGenerator.generateKeyPair();
        PublicKey publicKey = keys.getPublic();
        byte[] sigBytes = new byte[100];

        Signature signature = Signature.getInstance("SHA1withDSA");
        signature.initVerify(publicKey);
        try {
            signature.verify(sigBytes, Integer.MAX_VALUE, 1);
        } catch (IllegalArgumentException ex) {
            // Expected
        }
    }
}