DLI Implementation and Reference Guide - Datalogics

A.162 DLI Reference Guide
first 16 bytes of this buffer contain the MD5 checksum (in binary) for the PDF
document to sign. The callback must generate a PKCS #7 certificate as described
above, and fill the data buffer with the certificate, in binary. The callback function
must return the Concepts length to and read Facilities: from the data Guide buffer, to the in bytes. DL Pager Composition System
NOTE: maxLen bytes are set aside in the output PDF file for the PKCS #7
certificate, and will be written to the PDF file regardless of the actual certificate
length. Callers should pass length values which are close to the certificate length,
if possible.