HPDFHeadlessSignatureVRIKey

function HPDFHeadlessSignatureVRIKey(const Contents: TBytes): AnsiString;

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

Contents must be nonempty and already decoded from its PDF string representation; the return value omits the leading PDF name slash

This format-defined lookup digest does not authenticate the signature or evidence and does not select a signature digest algorithm