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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
commit | 43a123c1ae6613b3efeed291fa552ecd909d3acf (patch) | |
tree | fd92518b7024bc74031f78a1cf9e454b65e73665 /src/image/png/fuzz_test.go | |
parent | Initial commit. (diff) | |
download | golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.tar.xz golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.zip |
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/image/png/fuzz_test.go')
-rw-r--r-- | src/image/png/fuzz_test.go | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/image/png/fuzz_test.go b/src/image/png/fuzz_test.go new file mode 100644 index 0000000..4b63945 --- /dev/null +++ b/src/image/png/fuzz_test.go @@ -0,0 +1,72 @@ +// 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 png + +import ( + "bytes" + "image" + "os" + "path/filepath" + "strings" + "testing" +) + +func FuzzDecode(f *testing.F) { + if testing.Short() { + f.Skip("Skipping in short mode") + } + + testdata, err := os.ReadDir("../testdata") + if err != nil { + f.Fatalf("failed to read testdata directory: %s", err) + } + for _, de := range testdata { + if de.IsDir() || !strings.HasSuffix(de.Name(), ".png") { + continue + } + b, err := os.ReadFile(filepath.Join("../testdata", de.Name())) + if err != nil { + f.Fatalf("failed to read testdata: %s", err) + } + f.Add(b) + } + + f.Fuzz(func(t *testing.T, b []byte) { + cfg, _, err := image.DecodeConfig(bytes.NewReader(b)) + if err != nil { + return + } + if cfg.Width*cfg.Height > 1e6 { + return + } + img, typ, err := image.Decode(bytes.NewReader(b)) + if err != nil || typ != "png" { + return + } + levels := []CompressionLevel{ + DefaultCompression, + NoCompression, + BestSpeed, + BestCompression, + } + for _, l := range levels { + var w bytes.Buffer + e := &Encoder{CompressionLevel: l} + err = e.Encode(&w, img) + if err != nil { + t.Fatalf("failed to encode valid image: %s", err) + } + img1, err := Decode(&w) + if err != nil { + t.Fatalf("failed to decode roundtripped image: %s", err) + } + got := img1.Bounds() + want := img.Bounds() + if !got.Eq(want) { + t.Fatalf("roundtripped image bounds have changed, got: %s, want: %s", got, want) + } + } + }) +} |