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// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package zip
import (
"bytes"
"io"
"os"
"path/filepath"
"strings"
"testing"
"github.com/klauspost/compress/internal/fuzz"
)
func FuzzReader(f *testing.F) {
testdata, err := os.ReadDir("testdata")
if err != nil {
f.Fatalf("failed to read testdata directory: %s", err)
}
for _, de := range testdata {
if de.IsDir() {
continue
}
b, err := os.ReadFile(filepath.Join("testdata", de.Name()))
if err != nil {
f.Fatalf("failed to read testdata: %s", err)
}
f.Add(b)
}
fuzz.AddFromZip(f, "testdata/FuzzReader-raw.zip", fuzz.TypeRaw, testing.Short())
fuzz.AddFromZip(f, "testdata/FuzzReader-enc.zip", fuzz.TypeGoFuzz, testing.Short())
f.Fuzz(func(t *testing.T, b []byte) {
r, err := NewReader(bytes.NewReader(b), int64(len(b)))
if err != nil {
return
}
type file struct {
header *FileHeader
content []byte
}
files := make([]file, 0, len(r.File))
for i, f := range r.File {
fr, err := f.Open()
if err != nil {
continue
}
// No more than 1MiB per file
limit := int64(1 << 20)
if i < 100 {
limit = 10
}
content, err := io.ReadAll(io.LimitReader(fr, limit))
if err != nil {
continue
}
files = append(files, file{header: &f.FileHeader, content: content})
if _, err := r.Open(f.Name); err != nil {
continue
}
}
// If we were unable to read anything out of the archive don't
// bother trying to roundtrip it.
if len(files) == 0 {
return
}
w := NewWriter(io.Discard)
for _, f := range files {
ww, err := w.CreateHeader(f.header)
if err != nil {
t.Fatalf("unable to write previously parsed header: %s", err)
}
if !strings.HasSuffix(f.header.Name, "/") {
if _, err := ww.Write(f.content); err != nil {
t.Fatalf("unable to write previously parsed content: %s", err)
}
}
}
if err := w.Close(); err != nil {
t.Fatalf("Unable to write archive: %s", err)
}
// TODO: We may want to check if the archive roundtrips.
})
}
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