Obtaining openssl x509 certificate chain sent by server in custom cert_verify_callback?

As far as I konow the default verification function is X509_verify_cert . This function is called if you don't set your own verification callback (with SSL_CTX_set_cert_verify_callback ). It is defined in crypto/x509/x509_vfy.

C . I would suggest you look at the source code of this function to figure out what exactly you should do to convince OpenSSL to collaborate (e.g. Return error codes properly).

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