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Software components for data protection, secure storage and transfer

Signing PDF with .CER certificate

Also by EldoS: BizCrypto
Components for BizTalk® and SQL Server® Integration Services that let you securely store and transfer information in your business automation solutions.
#1624
Posted: 11/06/2006 08:27:56
by Chetan V (Basic support level)
Joined: 09/14/2006
Posts: 2

Hi All,

I am implementing an application for digitally signing document PDF using CA issued certificate. The CA has issued us a DER encoded .CER certificate. When I tried to sign the document using the .CER certificate, i recieved an exception saying that "Signing certificate not found".

I presume that the .CER file would only contain the public key. We have not received the private key. In the scenario, that we receive the private key, how would we be able to implement the digital signature solution? Similarly, the ELDOS SecureBlackBox.NET code has 2 files

cert.cer
cert.key

In the test Eldos application, how do i sign a PDF using the CERT.cer and cert.key?..I am used to the PFX format file and the application was successfully implemented for the PFX format. But I have hit a roadblock for the .CER format. Also, Is there any facility to obtain a PFX format cert using a .CER cert and its corresponding private key?

I am in dire need of help..

Thank you,
Chetan
#1625
Posted: 11/06/2006 08:59:41
by Eugene Mayevski (EldoS Corp.)

CER files really contain only public keys.

When you have a PFX file, you load it to TElX509Certificate. When you have CER + Key, you do the same - load them to TElX509Certificate.


Sincerely yours
Eugene Mayevski

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