118 lines
No EOL
3.6 KiB
Rust
118 lines
No EOL
3.6 KiB
Rust
#![no_main]
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use libfuzzer_sys::fuzz_target;
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use arbitrary::{Arbitrary, Unstructured};
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use arbitrary::size_hint::and_all;
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use std::fmt::{Debug, Formatter};
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use std::io::{Cursor, Read, Seek, Write};
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#[derive(Arbitrary,Debug)]
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pub struct File {
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pub name: String,
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pub contents: Vec<Vec<u8>>
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}
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const LARGE_FILE_BUF_SIZE: usize = u32::MAX as usize + 1;
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pub struct LargeFile {
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pub name: String,
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pub large_contents: Vec<u8>,
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pub extra_contents: Vec<Vec<u8>>
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}
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impl Arbitrary<'_> for LargeFile {
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fn arbitrary(u: &mut Unstructured) -> arbitrary::Result<Self> {
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Ok(LargeFile {
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name: String::arbitrary(u)?,
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large_contents: u.bytes(LARGE_FILE_BUF_SIZE)?.to_vec(),
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extra_contents: Vec::arbitrary(u)?
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})
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}
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fn size_hint(depth: usize) -> (usize, Option<usize>) {
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and_all(&[<String as Arbitrary>::size_hint(depth),
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<Vec<Vec<u8>> as Arbitrary>::size_hint(depth),
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(LARGE_FILE_BUF_SIZE, Some(LARGE_FILE_BUF_SIZE))])
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}
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}
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impl Debug for LargeFile {
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fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
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f.debug_struct("LargeFile")
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.field("name", &self.name)
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.field("extra_contents", &self.extra_contents)
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.finish()
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}
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}
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#[derive(Arbitrary,Debug)]
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pub enum FileOperation {
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Write {
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file: File,
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options: zip_next::write::FileOptions
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},
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WriteLarge {
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file: LargeFile,
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options: zip_next::write::FileOptions
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},
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ShallowCopy {
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base: Box<FileOperation>,
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new_name: String
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},
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DeepCopy {
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base: Box<FileOperation>,
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new_name: String
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}
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}
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impl FileOperation {
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pub fn get_name(&self) -> String {
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match self {
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FileOperation::Write {file, ..} => &file.name,
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FileOperation::WriteLarge {file, ..} => &file.name,
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FileOperation::ShallowCopy {new_name, ..} => new_name,
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FileOperation::DeepCopy {new_name, ..} => new_name
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}.to_owned()
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}
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}
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fn do_operation<T>(writer: &mut zip_next::ZipWriter<T>,
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operation: &FileOperation) -> Result<(), Box<dyn std::error::Error>>
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where T: Read + Write + Seek {
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match operation {
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FileOperation::Write {file, mut options} => {
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if file.contents.iter().map(Vec::len).sum::<usize>() >= u32::MAX as usize {
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options = options.large_file(true);
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}
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writer.start_file(file.name.to_owned(), options)?;
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for chunk in &file.contents {
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writer.write_all(chunk.as_slice())?;
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}
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}
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FileOperation::WriteLarge {file, mut options} => {
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options = options.large_file(true);
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writer.start_file(file.name.to_owned(), options)?;
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writer.write_all(&*file.large_contents)?;
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for chunk in &file.extra_contents {
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writer.write_all(chunk.as_slice())?;
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}
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}
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FileOperation::ShallowCopy {base, new_name} => {
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do_operation(writer, base)?;
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writer.shallow_copy_file(&base.get_name(), new_name)?;
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}
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FileOperation::DeepCopy {base, new_name} => {
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do_operation(writer, base)?;
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writer.deep_copy_file(&base.get_name(), new_name)?;
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}
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}
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Ok(())
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}
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fuzz_target!(|data: Vec<FileOperation>| {
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let mut writer = zip_next::ZipWriter::new(Cursor::new(Vec::new()));
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for operation in data {
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let _ = do_operation(&mut writer, &operation);
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}
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let _ = zip_next::ZipArchive::new(writer.finish().unwrap());
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}); |