mirror of https://github.com/google/oss-fuzz.git
98 lines
3.3 KiB
Java
98 lines
3.3 KiB
Java
// Copyright 2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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////////////////////////////////////////////////////////////////////////////////
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import com.code_intelligence.jazzer.api.FuzzedDataProvider;
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import org.apache.commons.codec.binary.Hex;
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import org.apache.commons.codec.binary.BaseNCodecInputStream;
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import org.apache.commons.codec.binary.Base64InputStream;
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import org.apache.commons.codec.binary.Base32InputStream;
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import org.apache.commons.codec.binary.Base16InputStream;
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import org.apache.commons.codec.binary.BaseNCodecOutputStream;
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import org.apache.commons.codec.binary.Base64OutputStream;
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import org.apache.commons.codec.binary.Base32OutputStream;
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import org.apache.commons.codec.binary.Base16OutputStream;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.util.Arrays;
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public class BinaryEncodingFuzzer {
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public static void fuzzerTestOneInput(FuzzedDataProvider data) {
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int selection = data.consumeInt(1,3);
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BaseNCodecInputStream bis;
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BaseNCodecOutputStream bos;
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ByteArrayOutputStream baos;
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String encodingType;
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byte[] originalInput = data.consumeRemainingAsBytes();
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final int SIZE = originalInput.length * 2;
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byte[] encoded = new byte[SIZE];
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//Base32 encoding requires 5 bytes per unencoded block
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if(originalInput.length < 5){
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return;
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}
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switch(selection){
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case 1: bis = new Base16InputStream(new ByteArrayInputStream(originalInput), true);
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baos = new ByteArrayOutputStream(SIZE);
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bos = new Base16OutputStream(baos, false);
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encodingType = "Base16";
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break;
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case 2: bis = new Base32InputStream(new ByteArrayInputStream(originalInput), true);
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baos = new ByteArrayOutputStream(SIZE);
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bos = new Base32OutputStream(baos, false);
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encodingType = "Base32";
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break;
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case 3: bis = new Base64InputStream(new ByteArrayInputStream(originalInput), true);
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baos = new ByteArrayOutputStream(SIZE);
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bos = new Base64OutputStream(baos, false);
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encodingType = "Base64";
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break;
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default: return;
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}
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try {
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bis.read(encoded);
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}
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catch (IOException e){
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return;
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}
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try{
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bos.write(encoded, 0, SIZE);
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}
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catch (IOException e){
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return;
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}
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byte[] decoded = baos.toByteArray();
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if(!Arrays.equals(originalInput, decoded)){
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throw new IllegalStateException("Failed to decode: " + Hex.encodeHexString(originalInput) + "\n"
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+ "Encoded using: " + "<type of encoder>" + "\n"
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+ "Encoded data: " + Hex.encodeHexString(encoded) + "\n"
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+ "Decoded data: " + Hex.encodeHexString(decoded) + "\n");
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}
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}
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}
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