/*

 * Copyright (c) 2009, 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.

 */

/*

 * @test

 * @bug 6864911

 * @summary ASN.1/DER input stream parser needs more work

 */

import java.io.*;

import sun.security.util.*;

import sun.misc.IOUtils;

public class BadValue {

    public static void main(String[] args) throws Exception {

        // Test IOUtils.readFully

        // We have 4 bytes

        InputStream in = new ByteArrayInputStream(new byte[10]);

        byte[] bs = IOUtils.readFully(in, 4, true);

        if (bs.length != 4 || in.available() != 6) {

            throw new Exception("First read error");

        }

        // But only 6 left

        bs = IOUtils.readFully(in, 10, false);

        if (bs.length != 6 || in.available() != 0) {

            throw new Exception("Second read error");

        }

        // MAX read as much as it can

        in = new ByteArrayInputStream(new byte[10]);

        bs = IOUtils.readFully(in, Integer.MAX_VALUE, true);

        if (bs.length != 10 || in.available() != 0) {

            throw new Exception("Second read error");

        }

        // MAX ignore readAll

        in = new ByteArrayInputStream(new byte[10]);

        bs = IOUtils.readFully(in, Integer.MAX_VALUE, false);

        if (bs.length != 10 || in.available() != 0) {

            throw new Exception("Second read error");

        }

        // 20>10, readAll means failure

        in = new ByteArrayInputStream(new byte[10]);

        try {

            bs = IOUtils.readFully(in, 20, true);

            throw new Exception("Third read error");

        } catch (EOFException e) {

            // OK

        }

        int bignum = 10 * 1024 * 1024;

        bs = IOUtils.readFully(new SuperSlowStream(bignum), -1, true);

        if (bs.length != bignum) {

            throw new Exception("Fourth read error");

        }

        // Test DerValue

        byte[] input = {0x04, (byte)0x84, 0x40, 0x00, 0x42, 0x46, 0x4b};

        try {

            new DerValue(new ByteArrayInputStream(input));

        } catch (IOException ioe) {

            // This is OK

        }

    }

}

/**

 * An InputStream contains a given number of bytes, but only returns one byte

 * per read.

 */

class SuperSlowStream extends InputStream {

    private int p;

    /**

     * @param Initial capacity

     */

    public SuperSlowStream(int capacity) {

        p = capacity;

    }

    @Override

    public int read() throws IOException {

        if (p > 0) {

            p--;

            return 0;

        } else {

            return -1;

        }

    }

    @Override

    public int read(byte b[], int off, int len) throws IOException {

        if (len == 0) return 0;

        if (p > 0) {

            p--;

            b[off] = 0;

            return 1;

        } else {

            return -1;

        }

    }

}