Log revoked certificate information

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Log revoked certificate information

Du Hao
Hi,

I'm looking for a way to track users who is using client certificate to log in to Apache HTTPD. Especially, I wanted to know who is trying to use revoked certificates to attempt login. Is there any possible way to log some of the certificate information, such as the certificate's serial number into the log so that whenever a revoked certificate is used, some information about the specific certificate is logged instead of just showing "certificate revoked" in error_log?

Thanks.

Regards,
Hao