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Description of problem:
NSS IPsec profile uses an interpretation of RFC 4945 that causes regression for those CA deployments that set the critical flags on key usage payloads.
Using the TLS profile of NSS, which was in use before using the NSS IPsec profile, does not reject based on critical flags.
Proposed fix:
Verify certificates using the IPsec profile first, if that fails, try using the TLS profile. (The TLS profile method tries as TLS server, then as TLS client).
By chaining the new method with the old method, we ensure there is no regression for those using the old method and those needing the new method.
note the certificates with the bogus critical flag were created by tinyca. Apparently when you change any setting and save it, it sets the critical flag. So when you go to set server certificate settings and save them, client certificate settings switch to critical, despite not touching client certificate settings at all.
This also probably means it is fairly uncommon as tinyca is not widely used.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHSA-2019:3391