https://boringssl-review.googlesource.com/c/boringssl/+/56109 tried to
simplify the X509V3_CTX story by automatically handling the second half
of initialization, but it turns out not all callers specify both values.
Instead, align with OpenSSL 3.0's behavior. Now X509V3_set_ctx
implicitly zeros the other fields, so it is the only mandatory init
function. This does mean callers which call X509V3_set_nconf before
X509V3_set_ctx will break, but that's true in OpenSSL 3.0 too.
I've retained the allowance for ctx being NULL, because whether
functions tolerate that or not is still a bit inconsistent. Also added
some TODOs about how strange this behavior is, but it's probably not
worth spending much more time on this code.
Change-Id: Ia04cf11eb5158374ca186795b7e579575e80666f
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/56265
Reviewed-by: Adam Langley <agl@google.com>
Auto-Submit: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
David Benjamin
1c9d18307b