Sneak peek: Digital signatures in Adobe PDF and PDF/A documents

Question

The sneak peek of selected version 17.0 features continues. Text Control is proud to unveil the new digital signature feature in Adobe PDF and PDF/A documents.

TX Text Control 17.0 will support digital signatures in Adobe PDF documents. The signatures can be created with PFX, DER Cer or Base64 CER certificate files. Additionally, certificates can be loaded from raw data or selected from the local certificate store.

The SaveSettings class has been extended with a DigitalSignature property that can be used to set the signature. To create a new signature, a valid System.Security.Cryptography.X509Certificate2 and an optional time server URL must be given. Thus makes it very easy to create securely signed PDF documents.

The following screencast shows a typical dialog to prepare a digital signature. This dialog will be available as a sample with full source code.

Animation

When opening such documents in Adobe Acrobat, a blue bar indicates that the document is signed with a valid signature:



Additionally, all certificate details can be viewed in a separate panel:



Just another great feature of the next version 17.0. Renew your subscriptions now to get version 17.0 as soon as it is released. We look forward to your feedback.


About TX Text Control:

TX Text Control was originally released in 1991, since then more than 50,000 copies have been sold. Starting off as a single, small DLL, TX Text Control has made its way through 16-bit DLL and VBX versions to today's Enterprise edition with its .NET and ActiveX components. The recent addition to the family, TX Text Control .NET Server, offers all of TX Text Control advanced word processing functionality in an easy-to-use server-side .NET component. Customers benefit from these years of experience, large user base, and at the same time, appreciate developing with a mature, reliable product.

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