93 lines
3.1 KiB
Java
93 lines
3.1 KiB
Java
/*
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* Copyright (c) 2023, 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 8321053
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* @summary Verify ByteArrayInputStream.buf is used directly by
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* ByteArrayInputStream.transferTo only when its OutputStream
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* parameter is trusted
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* @key randomness
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*/
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.util.Arrays;
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import java.util.Objects;
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import java.util.Random;
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public class TransferToTrusted {
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private static final Random RND = new Random(System.nanoTime());
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private static class UntrustedOutputStream extends OutputStream {
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UntrustedOutputStream() {
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super();
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}
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@Override
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public void write(byte[] b, int off, int len) throws IOException {
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Objects.checkFromIndexSize(off, len, b.length);
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byte[] tmp = new byte[len];
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RND.nextBytes(tmp);
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System.arraycopy(tmp, 0, b, off, len);
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}
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@Override
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public void write(int b) throws IOException {
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write(new byte[] {(byte)b});
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}
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}
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public static void main(String[] args) throws IOException {
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byte[] buf = new byte[RND.nextInt(1025)];
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System.out.println("buf.length: " + buf.length);
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RND.nextBytes(buf);
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byte[] dup = Arrays.copyOf(buf, buf.length);
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ByteArrayInputStream bais = new ByteArrayInputStream(dup);
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bais.mark(dup.length);
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OutputStream[] outputStreams = new OutputStream[] {
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new ByteArrayOutputStream(),
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new UntrustedOutputStream()
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};
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for (OutputStream out : outputStreams) {
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System.err.println("out: " + out.getClass().getName());
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bais.transferTo(out);
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bais.reset();
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try {
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if (!Arrays.equals(buf, bais.readAllBytes()))
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throw new RuntimeException("Internal buffer was modified");
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} finally {
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out.close();
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}
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bais.reset();
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}
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}
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}
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