CURLOPT_PROXY_SSLKEY(3)    Library Functions Manual    CURLOPT_PROXY_SSLKEY(3)

NAME
       CURLOPT_PROXY_SSLKEY - private key file for HTTPS proxy client cert

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLKEY, char *keyfile);

DESCRIPTION
       Pass a pointer to a null-terminated string as parameter. The string
       should be the filename of your private key used for connecting to the
       HTTPS proxy. The default format is "PEM" and can be changed with
       CURLOPT_PROXY_SSLKEYTYPE(3).

       (Windows, iOS and Mac OS X) This option is ignored by Secure Transport
       and Schannel SSL backends because they expect the private key to be
       already present in the key chain or PKCS#12 file containing the
       certificate.

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

DEFAULT
       NULL

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

       This option works only with the following TLS backends: OpenSSL,
       Schannel, 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 7.52.0

       If built TLS enabled.

RETURN VALUE
       Returns CURLE_OK if TLS is supported, CURLE_UNKNOWN_OPTION if not, or
       CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO
       CURLOPT_PROXY_SSLCERT(3), CURLOPT_PROXY_SSLKEYTYPE(3),
       CURLOPT_SSLCERT(3), CURLOPT_SSLKEY(3), CURLOPT_SSLKEYTYPE(3)

libcurl                          April 26 2024         CURLOPT_PROXY_SSLKEY(3)