From: DeskNow Knowledge Base
http://www.desknow.com/kb/

I already have an SSL certificate for Apache. How do I use it in DeskNow?
http://www.desknow.com/kb/idx/13/173/article/

If you already have an SSL certificate generated for an Apache web server, you can still use it in DeskNow.

Typically you would have two files for your Apache certificate: a .key file that contains your private key, and a .crt file that contains the public key. The .crt file should have been sent to you by a trusted certification authority.

Your goal is to combine them into a single httpkeystore file, located in desknowdatassl . This (once you have run the updateHttpKeystore command), is the SSL cert used by DeskNow, and it follows the standard Java Keystore format.

To convert a .crt+.key keypair into a single keystore, we recommend using a tool from IBM: http://www.alphaworks.ibm.com/tech/keyman/download

Brief how-to-use