[PR #331/3f40795a backport][stable-1] Extension parsing: add new fallback code which uses the new cryptography API #345
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This is a backport of PR #331 as merged into main (3f40795).
SUMMARY
This adds a fallback to extension parsing which uses the new API from pyca/cryptography#6346. I've used the new code as a fallback since it is potentially a breaking change (as announced as upcoming eventually in the changelog for 2.0.0). Switching to it as a default should only happen in a new minor release, while this can (and should) go into a bugfix release.
ISSUE TYPE
COMPONENT NAME
get_certificate
openssl_csr_info
x509_certificate_info