On Fri, 8 Aug 2025, Ondra via curl-users wrote:You might enjoy the curl-library mailing list more, as that focuses on libcurl and this list is more curl tool oriented.
Proper approach how to do this seems to be to use *CURLOPT_SSL_CTX_FUNCTION to register custom ctx function from which *SSL_CTX_set_cert_verify_callback can be used to register a verify callback. When this cert_verify_callback is invoked, I obtain the chain of certificates and post it for verification. Then I “return SSL_set_retry_verify(ssl);” from it. This works, however the problem is that the sockets scheduled by multi on behalf of this easy are not unscheduled; thus we busy loop until the cert verification finishes.
This explanation seems to leave something out. How can libcurl call a callback and wait for its return and at the same time run in a busy-loop?
-- / daniel.haxx.se || https://rock-solid.curl.dev
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