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Topic: Signatures: simulating PPKLite or any else
Conf: (P-PDF) Developers, Msg: 86668
Date: 4/26/2003 02:37 AM
I'm working on PDF generating by my simple PDFLib. I want to put Digital Signature into the PDF document :-(
Is it possible to create signature dictionary as like PPKLite, where the /Filter is Adobe.PPKLite and the /SubFilter is adbe.x09.rsa_sha1? Is it legal, or If I want to create Signature then I must have write a plugin for Acrobat?
I'm working whit MS Crypto API, and I can encrypt (any) data with the public key and decrypt (only the encrypted!) data with the private key.
The specification http://partners.adobe.com/asn/developer/pdfs/tn/ppk_pdfspec.pdf" said: "Inside the BER encoded octet string is an _RSA_encrypted_ BER encoded message digest". But it seems I can't RSA encrypt any data with the private key (by MS Crypto API).
Where can I read more about Signatures in PDF files?