NAME

       CURLOPT_PROXY_SSLCERT - HTTPS proxy client certificate

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLCERT, char *cert);

DESCRIPTION

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

       Pass a pointer to a null-terminated string as parameter. The string should be the filename
       of your client certificate used to connect to the HTTPS  proxy.   The  default  format  is
       "P12"  on  Secure  Transport  and  "PEM"  on  other  engines,  and  can  be  changed  with
       CURLOPT_PROXY_SSLCERTTYPE(3).

       With Secure Transport, this can also be the  nickname  of  the  certificate  you  wish  to
       authenticate  with as it is named in the security database. If you want to use a file from
       the current directory, please precede it with "./" prefix, in  order  to  avoid  confusion
       with a nickname.

       When  using  a client certificate, you most likely also need to provide a private key with
       CURLOPT_PROXY_SSLKEY(3).

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

DEFAULT

       NULL

PROTOCOLS

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

       This option works only with the following TLS backends: GnuTLS, OpenSSL, Schannel,  Secure
       Transport, mbedTLS and wolfSSL

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
           curl_easy_setopt(curl, CURLOPT_PROXY, "https://proxy");
           curl_easy_setopt(curl, CURLOPT_PROXY_SSLCERT, "client.pem");
           curl_easy_setopt(curl, CURLOPT_PROXY_SSLKEY, "key.pem");
           curl_easy_setopt(curl, CURLOPT_PROXY_KEYPASSWD, "s3cret");
           res = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in curl 7.52.0

RETURN VALUE

       Returns  CURLE_OK  if  TLS enabled, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if
       there was insufficient heap space.

SEE ALSO

       CURLOPT_PROXY_SSLCERTTYPE(3), CURLOPT_PROXY_SSLKEY(3), CURLOPT_SSLCERT(3)