curlopt_proxy_crlfile(3) [mojave man page]

CURLOPT_PROXY_CRLFILE(3)				     curl_easy_setopt options					  CURLOPT_PROXY_CRLFILE(3)

NAME

       CURLOPT_PROXY_CRLFILE - specify a proxy Certificate Revocation List file

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_CRLFILE, char *file);

DESCRIPTION

       This option is for connecting to a HTTPS proxy, not a HTTPS server.

       Pass  a char * to a zero terminated string naming a file with the concatenation of CRL (in PEM format) to use in the certificate validation
       that occurs during the SSL exchange.

       When curl is built to use NSS or GnuTLS, there is no way to influence the use of CRL passed to  help  in  the  verification  process.  When
       libcurl	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.

       This option makes sense only when used in combination with the CURLOPT_PROXY_SSL_VERIFYPEER(3) option.

       A specific error code (CURLE_SSL_CRL_BADFILE) is defined with the option. It is returned when the SSL exchange fails because the  CRL  file
       cannot  be  loaded.   A failure in certificate verification due to a revocation information found in the CRL does not trigger this specific
       error.

       The application does not have to keep the string around after setting this option.

DEFAULT

       NULL

PROTOCOLS

       Used with HTTPS proxy.

EXAMPLE

       TODO

AVAILABILITY

       Added in 7.52.0

RETURN VALUE

       Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO

       CURLOPT_PROXY_SSL_VERIFYPEER(3), CURLOPT_PROXY_SSL_VERIFYHOST(3), CURLOPT_SSL_VERIFYPEER(3), CURLOPT_SSL_VERIFYHOST(3),

libcurl 7.54.0							 December 21, 2016					  CURLOPT_PROXY_CRLFILE(3)

CURLOPT_SSL_VERIFYHOST(3)				     curl_easy_setopt options					 CURLOPT_SSL_VERIFYHOST(3)

NAME

       CURLOPT_SSL_VERIFYHOST - verify the certificate's name against host

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_VERIFYHOST, long verify);

DESCRIPTION

       Pass a long as parameter specifying what to verify.

       This option determines whether libcurl verifies that the server cert is for the server it is known as.

       When negotiating TLS and SSL connections, the server sends a certificate indicating its identity.

       When  CURLOPT_SSL_VERIFYHOST(3)	is  2,	that certificate must indicate that the server is the server to which you meant to connect, or the
       connection fails. Simply put, it means it has to have the same name in the certificate as is in the URL you operate against.

       Curl considers the server the intended one when the Common Name field or a Subject Alternate Name field in the certificate matches the host
       name in the URL to which you told Curl to connect.

       When  the  verify value is 1, curl_easy_setopt will return an error and the option value will not be changed.  It was previously (in 7.28.0
       and earlier) a debug option of some sorts, but it is no longer supported due to frequently leading to programmer mistakes. Future  versions
       will stop returning an error for 1 and just treat 1 and 2 the same.

       When the verify value is 0, the connection succeeds regardless of the names in the certificate. Use that ability with caution!

       The default value for this option is 2.

       This  option  controls  checking  the  server's	certificate's  claimed	identity.   The server could be lying.	To control lying, see CUR-
       LOPT_SSL_VERIFYPEER(3).

LIMITATIONS

       DarwinSSL: If verify value is 0, then SNI is also disabled. SNI is a TLS extension that sends the hostname to the server.  The  server  may
       use  that  information  to  do such things as sending back a specific certificate for the hostname, or forwarding the request to a specific
       origin server. Some hostnames may be inaccessible if SNI is not sent.

       NSS: If CURLOPT_SSL_VERIFYPEER(3) is zero, CURLOPT_SSL_VERIFYHOST(3) is also set to zero and cannot be overridden.

DEFAULT

       2

PROTOCOLS

       All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
	 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

	 /* Set the default value: strict name check please */
	 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 2L);

	 curl_easy_perform(curl);
       }

AVAILABILITY

       If built TLS enabled.

RETURN VALUE

       Returns CURLE_OK if TLS is supported, and CURLE_UNKNOWN_OPTION if not.

       If 1 is set as argument, CURLE_BAD_FUNCTION_ARGUMENT is returned.

SEE ALSO

       CURLOPT_SSL_VERIFYPEER(3), CURLOPT_CAINFO(3),

libcurl 7.54.0							 February 02, 2017					 CURLOPT_SSL_VERIFYHOST(3)