clearinfo.tex

The following more or less clears the info dictionary.

\pdfmanagement_add:nnn{Info}{Creator}{null}
\pdfmanagement_add:nnn{Info}{Producer}{null}
\pdfmanagement_add:nnn{Info}{CreationDate}{null}
\pdfmanagement_add:nnn{Info}{Title}{null}
\pdfmanagement_add:nnn{Info}{Trapped}{null}
\pdfmanagement_add:nnn{Info}{ModDate}{null}

\tex_pdfsuppressptexinfo:D 7 \scan_stop: %pdftex
\tex_pdfvariable:D suppressoptionalinfo 7\relax %luatex

if ModDate should stay

\pdf_object_unnamed_write:nn{dict}{}
\pdfmanagement_add:nnx{Catalog}{PieceInfo}{\pdf_object_ref_last:}


Comments

- verapdf doesn't yet handle the null entries correctly 
- doesn't work with xdvipdfmx: if e.g. Producer is null it fills it with the standard text.
- doesn't work with dvips
- a future pdftex will have  \pdfomitinfodict to suppress the info completly.