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#include <stdio.h>
#include <poppler-document.h>

int main(int argc, char *argv[]) {
    if (argc != 2) {
        fprintf(stderr, "Usage: %s <input_pdf>\n", argv[0]);
        return 1;
    }

    const char *input_pdf = argv[1];
    GError *error = NULL;

    // Open the PDF document
    PopplerDocument *document = poppler_document_new_from_file(input_pdf, NULL, &error);
    if (error != NULL) {
        fprintf(stderr, "Error opening PDF: %s\n", error->message);
        g_error_free(error);
        return 1;
    }

    // Check if the document is encrypted
    if (poppler_document_get_n_pages(document) == 0) {
        printf("The PDF is encrypted.\n");
    } else {
        printf("The PDF is not encrypted.\n");
    }

    // Check if the document is signed
    if (poppler_document_get_metadata(document, "signature") != NULL) {
        printf("The PDF is signed.\n");
    } else {
        printf("The PDF is not signed.\n");
    }

    // Free the document object
    g_object_unref(document);

    return 0;
}

#include "FiveWin.ch"

function Main()

    MsgInfo( IsSigned( "fwintro.pdf" ) )

return nil 

function IsSigned( cPDFFileName )

return At( "/SigFlags", hb_memoRead( cPDFFileName ) ) != 0

import sys, aspose.pdf as ap

pdfSign = ap.facades.PdfFileSignature()
pdfSign.bind_pdf(sys.argv[ 1 ])
signatures = pdfSign.get_sign_names( True )

if( signatures.length ) > 0 :
   print( "signed" )
else:
   print( "not signed" )

pyinstaller --onefile signed.py

 WaitRun( "signed.exe " + cPdfFileName + " > result.txt" )
if hb_memoRead( "result.txt" ) == "signed"
   MsgInfo( "signed" )
else
   MsgInfo( "non signed" )
endif