Malin/ZPLify
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Merge pull request #6 from pic4xiu/master

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Program crashes when processing certain maliciously crafted images
This commit is contained in:
Simon Waldherr
2023-06-17 22:20:03 +02:00
committed by GitHub
parent 8e9af9e508 0c8c6c6ddc
commit c0d018ffa9
1 changed files with 6 additions and 0 deletions
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6
zplgfa.go
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@@ -24,6 +24,12 @@ const (
// ConvertToZPL is just a wrapper for ConvertToGraphicField which also includes the ZPL // ConvertToZPL is just a wrapper for ConvertToGraphicField which also includes the ZPL
// starting code ^XA and ending code ^XZ, as well as a Field Separator and Field Origin. // starting code ^XA and ending code ^XZ, as well as a Field Separator and Field Origin.
func ConvertToZPL(img image.Image, graphicType GraphicType) string { func ConvertToZPL(img image.Image, graphicType GraphicType) string {
//Check before entering the ConvertToGraphicField function
//if the width is 0, the function can exit early
check := img.Bounds().Size().X / 8
if check == 0 {
return ""
}
return fmt.Sprintf("^XA,^FS\n^FO0,0\n%s^FS,^XZ\n", ConvertToGraphicField(img, graphicType)) return fmt.Sprintf("^XA,^FS\n^FO0,0\n%s^FS,^XZ\n", ConvertToGraphicField(img, graphicType))
} }