mirror of https://github.com/google/oss-fuzz.git
77 lines
2.9 KiB
Java
77 lines
2.9 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 com.code_intelligence.jazzer.api.FuzzerSecurityIssueLow;
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import com.google.common.collect.ImmutableList;
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import com.google.common.jimfs.Configuration;
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import com.google.common.jimfs.Jimfs;
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.FileSystem;
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import java.nio.file.Files;
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import java.nio.file.InvalidPathException;
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import java.nio.file.Path;
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import static com.google.common.jimfs.PathNormalization.CASE_FOLD_UNICODE;
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import static com.google.common.jimfs.PathNormalization.NFD;
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public class FileSystemFuzzer {
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public static void fuzzerTestOneInput(FuzzedDataProvider data) {
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Configuration.Builder configBuilder;
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if (data.consumeBoolean()) {
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configBuilder = Configuration.unix().toBuilder();
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} else {
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configBuilder = Configuration.windows().toBuilder();
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}
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FileSystem fs;
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try {
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fs = Jimfs.newFileSystem(configBuilder
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.setNameCanonicalNormalization(NFD, CASE_FOLD_UNICODE)
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.setBlockSize(data.consumeInt(1, 1000))
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.setMaxSize(data.consumeLong(1, 100000))
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.setRoots(data.consumeString(50))
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.setWorkingDirectory("/" + data.consumeString(50))
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.setMaxCacheSize(data.consumeLong(1, 100000))
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.setPathEqualityUsesCanonicalForm(data.consumeBoolean())
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.build()
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);
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} catch (java.lang.IllegalArgumentException e) {
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return;
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}
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Path foo;
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try {
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foo = fs.getPath(data.consumeString(50));
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} catch (InvalidPathException e) {
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return;
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}
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String content = data.consumeRemainingAsString();
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try {
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Files.createDirectory(foo);
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Path dummyFile = foo.resolve("dummy.txt");
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Files.write(dummyFile, ImmutableList.of(content), StandardCharsets.UTF_8);
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String fileContent = Files.readString(dummyFile);
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if (!fileContent.contains(content)) {
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throw new FuzzerSecurityIssueLow("Content not entirely written to file");
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}
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} catch (IOException ignored) {}
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}
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}
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