List the digital signatures attached to a PDF document

Returns a pdfium_signature_list — a list of pdfium_signature handles, one per signature object in the document. Per-attribute getters (pdf_signature_sub_filter(), pdf_signature_reason(), pdf_signature_time(), pdf_signature_doc_mdp_permission(), pdf_signature_contents(), pdf_signature_byte_range()) operate on a single handle.

Usage

pdf_signatures(doc)

Arguments

doc

A pdfium_doc from pdf_doc_open(), or a character path.

Value

A pdfium_signature_list (empty if no signatures).

Details

Use tibble::as_tibble(pdf_signatures(doc)) for the tibble view.

Wraps FPDF_GetSignatureCount, FPDF_GetSignatureObject, and the FPDFSignatureObj_* family.

See also

pdf_signature_contents(), pdf_signature_byte_range(), pdf_parse_date() for parsing the time string.