SaveAsPadesDssToStream - TPdf - PDFium Delphi Component

Component: TPdf · Unit: PDFium

Saves the active PDF to a custom stream while embedding PAdES DSS validation certificates

Syntax

function SaveAsPadesDssToStream(Stream: TStream; const Options: TPadesDssOptions): Boolean;

Description

Saves the current document bytes into a custom stream while injecting X.509 validation materials (certificates, CRLs, and OCSP responses) into the document's global /DSS dictionary

TPadesDssOptions.Vris writes signature-specific indirect VRI dictionaries whose certificate, OCSP, and CRL arrays reference deduplicated global material streams

Parameters

Stream	Destination stream to write the output bytes into
Options	Complete DSS configuration containing validation material and signature-specific VRI entries

Remarks

Requires Active to be True
The method utilizes temporary memory allocations to generate the incremental update and stream it out cleanly
The incremental update preserves the source xref table or xref-stream representation and uses 64-bit offsets in 64-bit builds
Each VRI key is the uppercase SHA-1 of the complete decoded signature /Contents value including padding
Material and VRI indexes are validated before writing; invalid input raises EPadesCrypto without changing the destination stream
The supplied options replace the active DSS, so callers updating an existing DSS must include every material and VRI entry that the output should retain

Example

var
  MemStream: TMemoryStream;
  DssOpts: TPadesDssOptions;
begin
  if not Pdf1.Active then Exit;
  MemStream := TMemoryStream.Create;
  try
    DssOpts := TPadesDssOptions.Default;
    Pdf1.SaveAsPadesDssToStream(MemStream, DssOpts);
  finally
    MemStream.Free;
  end;
end;

SaveAsPadesDssToStream method