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Ensure PDF version is at least 1.5 for SigFlags and UF support

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This commit is contained in:
Paul van Brouwershaven
2025-05-12 10:21:10 +02:00
committed by Paul van Brouwershaven
parent e026bf1577
commit bf1f861031
1 changed files with 4 additions and 3 deletions
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7
sign/pdfcatalog.go
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@@ -28,9 +28,10 @@ func (context *SignContext) createCatalog() ([]byte, error) {
// written in the PDF file (for example, /1.4).
//
// If an incremental upgrade requires a version that is higher than specified by the document.
// if context.PDFReader.PDFVersion < "2.0" {
// catalog_buffer.WriteString(" /Version /2.0")
// }
// Ensure PDF version is at least 1.5 to support SigFlags in acroFormDict (1.4) and UF in the fileSpecDict (1.5)
if v, err := strconv.ParseFloat(context.PDFReader.PDFVersion, 64); err == nil && v < 1.5 {
catalog_buffer.WriteString(" /Version /1.5")
}
// Retrieve the root, its pointer and set the root string
root := context.PDFReader.Trailer().Key("Root")