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// Copyright 2021 Code Intelligence GmbH
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.example;
import com.code_intelligence.jazzer.api.FuzzedDataProvider;
import org.libjpegturbo.turbojpeg.TJ;
import org.libjpegturbo.turbojpeg.TJDecompressor;
import org.libjpegturbo.turbojpeg.TJException;
import org.libjpegturbo.turbojpeg.TJTransform;
import org.libjpegturbo.turbojpeg.TJTransformer;
public class TurboJpegFuzzer {
static byte[] buffer = new byte[128 * 128 * 4];
public static void fuzzerInitialize() throws TJException {
// Trigger an early load of the native library to show the coverage counters stats in libFuzzer.
new TJDecompressor();
}
public static void fuzzerTestOneInput(FuzzedDataProvider data) {
try {
int flagsDecompress = data.consumeInt();
int flagsTransform = data.consumeInt();
int pixelFormat = data.consumeInt(TJ.PF_RGB, TJ.PF_CMYK);
// Specify explicit small target width/height so that we can reuse a
// fixed-size buffer.
int desiredWidth = data.consumeInt(1, 128);
int desiredHeight = data.consumeInt(1, 128);
int transformOp = data.consumeInt(TJTransform.OP_NONE, TJTransform.OP_ROT270);
int transformOptions = data.consumeInt();
int transformWidth = data.consumeBoolean() ? 128 : 64;
int transformHeight = data.consumeBoolean() ? 128 : 64;
TJDecompressor tjd;
if (data.consumeBoolean()) {
TJTransformer tjt = new TJTransformer(data.consumeRemainingAsBytes());
TJTransform tjf = new TJTransform(
0, 0, transformWidth, transformHeight, transformOp, transformOptions, null);
tjd = tjt.transform(new TJTransform[] {tjf}, flagsTransform)[0];
} else {
tjd = new TJDecompressor(data.consumeRemainingAsBytes());
}
tjd.decompress(buffer, 0, 0, desiredWidth, 0, desiredHeight, pixelFormat, flagsDecompress);
} catch (Exception ignored) {
// We are not looking for Java exceptions, but segfaults and ASan reports.
}
}
}
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