SetSignProcessDocMDP

Security and Signatures

Description

Configures the digital signature process to create a certifying signature with a complete DocMDP transform

The generated signature dictionary receives a /Reference entry with the requested permission level, and the document catalog receives a matching /Perms /DocMDP reference to that signature dictionary

Syntax

Delphi

Function TPDFlib.SetSignProcessDocMDP(SignProcessID, Level: Integer): Integer;

Parameters

SignProcessID	Value returned by one of the `NewSignProcessFrom*` functions
Level	`0` disables certification, `1` permits no changes, `2` permits form filling and signing, and `3` additionally permits annotations

Returns

0	The process identifier or level is invalid
1	The requested level was stored on the signing process

Certification constraint

A certifying signature must be the document's first signed signature and the catalog must not already contain a DocMDP permission reference

If either condition is violated, the signing operation is rejected instead of emitting a second or ambiguous certification structure

Verification

TPDFlibSignatureVerifier.GetSignaturePermissionInfo* reports the permission level, structural validity, and whether the catalog reference matches the selected signature