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Updated: Wednesday, July 27, 2022
 
 

CURLOPT_PROXY_ISSUERCERT (3)

Name

CURLOPT_PROXY_ISSUERCERT - proxy issuer SSL certificate filename

Synopsis

#include <curl/curl.h>

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

Description

curl_easy_setopt options                           CURLOPT_PROXY_ISSUERCERT(3)



NAME
       CURLOPT_PROXY_ISSUERCERT - proxy issuer SSL certificate filename

SYNOPSIS
       #include <curl/curl.h>

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

DESCRIPTION
       Pass  a  char  * to a null-terminated string naming a file holding a CA
       certificate in PEM format. If the option is set,  an  additional  check
       against  the  peer certificate is performed to verify the issuer of the
       the HTTPS proxy is indeed the one associated with the certificate  pro-
       vided  by  the  option.  This additional check is useful in multi-level
       PKI where one needs to enforce that the peer certificate is from a spe-
       cific branch of the tree.

       This  option  makes  sense  only when used in combination with the CUR-
       LOPT_PROXY_SSL_VERIFYPEER(3) option. Otherwise, the result of the check
       is not considered as failure.

       A  specific  error  code  (CURLE_SSL_ISSUER_ERROR)  is defined with the
       option, which is returned if the  setup  of  the  SSL/TLS  session  has
       failed  due  to  a  mismatch  with the issuer of peer certificate (CUR-
       LOPT_PROXY_SSL_VERIFYPEER(3) has to be set too for the check to fail).

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

DEFAULT
       NULL

PROTOCOLS
       All TLS-based protocols

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
         /* using an HTTPS proxy */
         curl_easy_setopt(curl, CURLOPT_PROXY, "https://localhost:443");
         curl_easy_setopt(curl, CURLOPT_PROXY_ISSUERCERT, "/etc/certs/cacert.pem");
         ret = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

AVAILABILITY
       Added in 7.71.0. This option is supported by the OpenSSL backends.

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.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       +---------------+------------------+
       |ATTRIBUTE TYPE | ATTRIBUTE VALUE  |
       +---------------+------------------+
       |Availability   | web/curl         |
       +---------------+------------------+
       |Stability      | Uncommitted      |
       +---------------+------------------+

SEE ALSO
       CURLOPT_PROXY_SSL_VERIFYPEER(3), CURLOPT_PROXY_SSL_VERIFYHOST(3),  CUR-
       LOPT_SSL_VERIFYPEER(3), CURLOPT_SSL_VERIFYHOST(3),



NOTES
       Source  code  for open source software components in Oracle Solaris can
       be found at https://www.oracle.com/downloads/opensource/solaris-source-
       code-downloads.html.

       This     software     was    built    from    source    available    at
       https://github.com/oracle/solaris-userland.   The  original   community
       source       was       downloaded      from       https://curl.se/down-
       load/curl-7.83.1.tar.bz2.

       Further information about this software can be found on the open source
       community website at http://curl.haxx.se/.



libcurl 7.83.1                 November 26, 2021
                                                   CURLOPT_PROXY_ISSUERCERT(3)