77 lines
1.8 KiB
Go
77 lines
1.8 KiB
Go
// +build gofuzz
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/*
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Copyright The containerd Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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package fuzz
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import (
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"bytes"
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"context"
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"io/ioutil"
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"os"
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fuzz "github.com/AdaLogics/go-fuzz-headers"
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"github.com/containerd/containerd/archive"
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"github.com/containerd/containerd/content/local"
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imageArchive "github.com/containerd/containerd/images/archive"
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)
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// FuzzApply implements a fuzzer that applies
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// a fuzzed tar archive on a directory
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func FuzzApply(data []byte) int {
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f := fuzz.NewConsumer(data)
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iters, err := f.GetInt()
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if err != nil {
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return 0
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}
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maxIters := 20
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tmpDir, err := ioutil.TempDir("", "prefix-test")
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if err != nil {
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return 0
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}
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defer os.RemoveAll(tmpDir)
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for i := 0; i < iters%maxIters; i++ {
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rBytes, err := f.TarBytes()
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if err != nil {
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return 0
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}
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r := bytes.NewReader(rBytes)
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_, _ = archive.Apply(context.Background(), tmpDir, r)
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}
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return 1
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}
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// FuzzImportIndex implements a fuzzer
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// that targets archive.ImportIndex()
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func FuzzImportIndex(data []byte) int {
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f := fuzz.NewConsumer(data)
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tarBytes, err := f.TarBytes()
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if err != nil {
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return 0
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}
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ctx := context.Background()
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r := bytes.NewReader(tarBytes)
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tmpdir, err := ioutil.TempDir("", "fuzzing-")
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if err != nil {
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return 0
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}
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cs, err := local.NewStore(tmpdir)
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if err != nil {
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return 0
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}
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_, _ = imageArchive.ImportIndex(ctx, cs, r)
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return 1
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}
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