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/*
* Copyright (c) 2009, 2019, 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.
// We have 4 bytes
InputStream in = new ByteArrayInputStream(new byte[10]);
byte[] bs = IOUtils.readExactlyNBytes(in, 4);
if (bs.length != 4 || in.available() != 6) {
throw new Exception("First read error");
}
// But only 6 left
bs = IOUtils.readNBytes(in, 10);
if (bs.length != 6 || in.available() != 0) {
throw new Exception("Second read error");
}
// MAX length results in exception
in = new ByteArrayInputStream(new byte[10]);
try {
bs = IOUtils.readExactlyNBytes(in, Integer.MAX_VALUE);
throw new Exception("No exception on MAX_VALUE length");
} catch (EOFException ex) {
// this is expected
}
// -1 length results in exception
in = new ByteArrayInputStream(new byte[10]);
try {
bs = IOUtils.readExactlyNBytes(in, -1);
throw new Exception("No exception on -1 length");
} catch (IOException ex) {
// this is expected
}
// 20>10, readAll means failure
in = new ByteArrayInputStream(new byte[10]);
try {
bs = IOUtils.readExactlyNBytes(in, 20);
throw new Exception("No exception on EOF");
} catch (EOFException e) {
// OK
}
int bignum = 10 * 1024 * 1024;
bs = IOUtils.readExactlyNBytes(new SuperSlowStream(bignum), bignum);
if (bs.length != bignum) {
throw new Exception("Read returned small array");
}
// 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;
}
}
}
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