[scotthart]

When in environments that do not have OpenSSL, don't try to use it.

[gemini-code-assist]

Code Review

This pull request adds conditional compilation guards (GOOGLE_CLOUD_CPP_HAVE_OPENSSL) around OpenSSL headers and the AvailableCryptoGroups function in ssl_ec_curves.cc. However, the review highlights that OpenSslDeleter also uses OpenSSL types and remains unguarded, which will cause compilation failures when OpenSSL is disabled. The entire implementation of OpenSslDeleter should also be guarded.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.39%. Comparing base (c9a3c69) to head (e07461f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #16579   +/-   ##
=======================================
  Coverage   92.39%   92.39%           
=======================================
  Files        2266     2266           
  Lines      219636   219636           
=======================================
+ Hits       202935   202943    +8     
+ Misses      16701    16693    -8     

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