Re: DCM Key Database file error ZSRV_MSG09B5 after instance restart - SOLVED (once again)

Pete Helgren <[email protected]>
Newsgroups gmane.comp.systems.as400.web
Message-ID <[email protected]>
Charles,

Thanks.  My initial response was "I don't think so."....

I have both the R3 intermediate and the ISRG Root X1 CA root certificate 
in my IBM i CA certs certificate store.  The dates are valid.  The 
certificates I get from Letsencrypt when I renew are the "bundle" which 
include the intermediate and the root.  The decoder I used to check the 
certs show that they have valid dates (the root took a while to validate).

But then, I decided to take a closer look at what LetsEncrypt was saying 
about the expiration.  The issue is that the ISRG Root X1 (CA Root in 
this case) was signed by *another* root, (DST Root CA X3) It's THAT root 
that expired.  LetEncrypt goes on to say "Oh, that won't be a problem 
because the ISRG Root X1 is trusted by most browsers"  Well, somewhere 
down the chain, there was no trust.  To further complicate matters, LE 
continues to issue certs that reference the ISRG Root X1 that is signed 
by DST Root CA X3. ARRRGH!  So I manually changed the ISRG Root X1 to 
the new one that is self signed, as most CA roots are, and "Bob's your 
uncle"...

Certificate chains always make my head hurt...In this case, I had 
imported the ISRG Root X1 that IS self-signed into the CA certificate 
store on IBM i.  It was the pem file with the "bad" certificate chain 
that was buggering the works.

Thanks for forcing me to challenge my own assumptions.

Pete Helgren
www.petesworkshop.com
GIAC Secure Software Programmer-Java
AWS Certified Cloud Practitioner
Microsoft Certified: Azure Fundamentals
Twitter - Sys_i_Geek  IBM_i_Geek

On 10/1/2021 10:17 AM, Charles Wilt wrote:
> Pete,
>
> Any chance this is part of the problem?
> https://www.zdnet.com/article/fortinet-shopify-others-report-issues-after-root-ca-certificate-from-lets-encrypt-expires/
>
> Charles
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