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pcai
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Sep 15, 2026
Add an opt-in :cert_store option to Viewpoint::EWS::Connection#initialize (also reachable through EWSClient's :http_opts). When given an OpenSSL::X509::Store, it is assigned directly to the HTTPClient SSL config and the :trust_ca handling is skipped. In some environments the default certificate store fails to verify an otherwise valid chain (e.g. "certificate verify failed (unable to get local issuer certificate)" against a Let's Encrypt-issued server cert), leaving monkeypatching as the only recourse. This gives those users a supported escape hatch without changing any default behavior. Supersedes #297, reimplemented from current main.
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I recently has an issue with a customer having a valid certificate chain, but nevertheless the viewpoint gem raised error
certificate verify failed (unable to get local issuer certificate) (OpenSSL::SSL::SSLError)when trying to access their server. Their certificate was generated with Let's Encrypt.I fixed this error by providing the default certificate store for use by EWSClient, like this
I'm not sure why Viewpoint doesn't use the system certificate store by default, and there may be a more elegant fix to this, but I thought I would put this out there.