Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help 
CURLOPT_PR...VERIFYHOST(3)  Library Functions Manual  CURLOPT_PR...VERIFYHOST(3)

NAME
     CURLOPT_PROXY_SSL_VERIFYHOST  - verify the proxy certificate's name against
     host

SYNOPSIS
     #include <curl/curl.h>

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

DESCRIPTION
     Pass a long set to 2L as asking curl to verify in the  HTTPS  proxy's  cer-
     tificate name fields against the proxy name.

     This  option  determines  whether libcurl verifies that the proxy cert con-
     tains the correct name for the name it is known as.

     When CURLOPT_PROXY_SSL_VERIFYHOST(3) is 2, the proxy certificate must indi-
     cate that the server is the proxy to which you meant to connect to, or  the
     connection fails.

     curl  considers  the proxy the intended one when the Common Name field or a
     Subject Alternate Name field in the certificate matches the hostname in the
     proxy string which you told curl to use.

     If verify value is set to 1:

     In 7.28.0 and earlier: treated as a debug option of some  sorts,  not  sup-
     ported anymore due to frequently leading to programmer mistakes.

     From  7.28.1  to 7.65.3: setting it to 1 made curl_easy_setopt(3) return an
     error and leaving the flag untouched.

     From 7.66.0: treats 1 and 2 the same.

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

     See also CURLOPT_PROXY_SSL_VERIFYPEER(3) to verify the digital signature of
     the proxy certificate.

DEFAULT
     2

PROTOCOLS
     This  functionality  affects  all	TLS based protocols: HTTPS, FTPS, IMAPS,
     POP3S, SMTPS etc.

     All TLS backends support this option.

EXAMPLE
     int main(void)
     {
       CURL *curl = curl_easy_init();
       if(curl) {
	 CURLcode result;
	 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

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

	 result = curl_easy_perform(curl);
	 curl_easy_cleanup(curl);
       }
     }

AVAILABILITY
     Added in curl 7.52.0

RETURN VALUE
     curl_easy_setopt(3) returns a CURLcode indicating success or error.

     CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
     libcurl-errors(3).

SEE ALSO
     CURLOPT_CAINFO(3),     CURLOPT_PROXY_CAINFO(3),	 CURLOPT_PROXY_SSL_VERI-
     FYPEER(3), CURLOPT_SSL_VERIFYPEER(3)

libcurl 			   2026-06-11	      CURLOPT_PR...VERIFYHOST(3)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=CURLOPT_PROXY_SSL_VERIFYHOST&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>

home | help