HPDFHeadlessSignatureVRIKey

function HPDFHeadlessSignatureVRIKey(const Contents: TBytes): AnsiString;

Returns the 40-character uppercase SHA-1 VRI dictionary key for the complete PDF signature Contents string, reserved zero padding included

Contents must be nonempty and already decoded out of its PDF string representation; the returned value omits the leading PDF name slash

This format-defined lookup digest does not authenticate the signature or the evidence, nor does it select a signature digest algorithm