Hi,

I'm not sure if I should post this to the openssl mailing list or here, but 
thought that it'd make sense to start here.  If that is not appropriate, please 
let me know?


Anyway, we are upgrading some of our Apache instance to 2.4.16 (on Redhat), and 
we are encountering a strange problem with SSL and CRLs.


Our websites are configured for SSL client authentication with CRLs in a 
directory pointed to by SSLCACertificateRevocationPath and SSLCARevocationCheck 
set to "chain".  We then place our CRLs in the directory and create the hashes 
for them.

However, when we tried to upgrade one of our production instances the requests 
are failing and, in the error logs, we are seeing the following messages:

[ssl.debug] [pid 4866] ssl_engine_kernel.c: [client 10.10.10.10-xxxx] 
Certificate Verification, depth 1, CRL checking mode: chain [subject: 
CN=CA4,OU=branch,.... / issuer: CN=Root 3,OU=branch,... / serial: 86 / 
notbefore: Aug 1 00:00:00 2013 GMT / notafter: Aug 1 00:00:00 2021 GMT] 

[ssl.info] [pid 4866] [client 10.10.10.10-xxxx] Certificate Verification: Error 
(12): CRL has expired [subject: CN=CA4,OU=branch,... / issuer: CN=Root 3,... / 
serial: 86 / notbefore: Aug 1 00:00:00 2013 GMT / notafter: Aug 1 00:00:00 2021 
GMT] 

We checked all of the CRL files and they are all within their validity periods.


The thing is that we have not been able to replicate this problem in our test 
environment, when we try to re-create a similar PKI heirarchy, so we (or I) 
suspect that there may be something going on with either the CRLs or cert files 
that we are getting from the CAs (but recall that these same CRLs worked with 
older Apache.  So I was wondering: If there is any known situations where that 
"Error 12" would be logged, but where the problem was being cause by something 
other than the CRL files actually being expired?

As I said, this might be more of an openssl question?

Thanks in advance,
Jim

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