IBM's documentation on this web page:
http://publib.boulder.ibm.com/infocenter/wsdoc400/v6r0/topic/com.ibm.websphere.iseries.doc/info/ae/ae/secmigjsse.htm

provides instructions on how to export the certificates from DCM into Java 
keystores. As they mention below, they've moved away from using the proprietary 
.kdb keystore format and now support using the standard Java .jks format.

"The use of OS/400 *SYSTEM certificate stores (.kdb files) for WebSphere 
Application Server applications was deprecated in WebSphere Application Server 
Version 5.x. In Version 6 and later, only Java keystores (.jks files) are fully 
supported. You must migrate your applications to use Java keystores."

"DCM uses PKCS12 format to export client and server certificates, and it uses 
base64 encoded format to export certificate authority certificates.... However, 
you must to convert the base64 encoded data from EBCDIC to ASCII format"

See the web page for complete instructions, including converting from EBCDIC to 
ASCII.

Cheers!

Simba
Engineering

-----Original Message-----
From: James Lampert [mailto:jam...@touchtonecorp.com] 
Sent: Friday, 05 October, 2012 09:29
To: Tomcat Users List
Subject: Re: Not sure what to make of this, Re: bringing up HTTPS on Tomcat

Mark H. Wood wrote:
> I have no idea what DCM is or does.  Maybe it works with PKCS #12 
> files, which can carry both parts in a single container.

That part isn't really relevant here (I hope), but to clarify:

DCM = Digital Certificate Manager. It's part of the IBM Midrange operating 
system (i.e, "OS/400," "i5OS," or whatever they're calling it this week). It 
uses an entirely different keystore format from that used by Java and Keytool 
(and, by extension, Tomcat), and so far as I (and the real IBM Midrange gurus 
on the various Midrange.com lists) can determine, there's nothing currently 
available to convert a keystore between the IBM-proprietary format and the Java 
format.

We've had more than one customer who screwed themselves out of a certificate 
signing fee by failing to appreciate the distinction, even though we do our 
best to warn them about it.

--
JHHL

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