forked from dvyukov/go-fuzz
/
bmp.go
51 lines (48 loc) · 1019 Bytes
/
bmp.go
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// Copyright 2015 Dmitry Vyukov. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package bmp
import (
"bytes"
"encoding/hex"
"fmt"
"golang.org/x/image/bmp"
)
func Fuzz(data []byte) int {
cfg, err := bmp.DecodeConfig(bytes.NewReader(data))
if err != nil {
return 0
}
if cfg.Width*cfg.Height > 1e6 {
return 0
}
if cfg.Width*cfg.Height == 0 {
// Workaround for a know bug.
return 0
}
img, err := bmp.Decode(bytes.NewReader(data))
if err != nil {
return 0
}
var w bytes.Buffer
err = bmp.Encode(&w, img)
if err != nil {
panic(err)
}
enc := w.Bytes()
img1, err := bmp.Decode(&w)
if err != nil {
panic(err)
}
var w1 bytes.Buffer
err = bmp.Encode(&w1, img1)
if err != nil {
panic(err)
}
enc1 := w1.Bytes()
if !bytes.Equal(enc, enc1) {
fmt.Printf("image1: [%v]%v\n", len(enc), hex.EncodeToString(enc))
fmt.Printf("image2: [%v]%v\n", len(enc1), hex.EncodeToString(enc1))
panic("not equal")
}
return 1
}