Digital signature (signatures.java): ----------------------------
Using class 'com.pdflib.pdflib' for running Cookbook example (pCOS Interface 13)
File name: ../input/invoice-signed.pdf
Invisible signature field 'Signature1': approval signature
CAdES/PAdES signature
Name of signer: 'PLOP Demo Signer RSA-2048'
Time of signing: 'D:20190401184150+02'00''

Document Security Store (DSS) present:
	0 VRI entries (validation-related information)
	1 certificate(s)
	0 OCSP response(s)
	0 CRL(s)