CURLOPT_CRLFILE

CURLOPT_CRLFILE is one of the accepted parameters for curl_setopt parameter #2.

CURLOPT_CRLFILE — Pass a string naming a file with the concatenation of CRL (Certificate Revocation List) (in PEM format) to use in the certificate validation that occurs during the SSL exchange. When cURL is built to use GnuTLS, there is no way to influence the use of CRL passed to help in the verification process. When cURL is built with OpenSSL support, X509_V_FLAG_CRL_CHECK and X509_V_FLAG_CRL_CHECK_ALL are both set, requiring CRL check against all the elements of the certificate chain if a CRL file is passed. Also note that CURLOPT_CRLFILE implies CURLSSLOPT_NO_PARTIALCHAIN as of cURL 7.71.0 due to an OpenSSL bug. Available as of cURL 7.19.0.

CURLOPT_CRLFILE = 10169;