CURLOPT_PROXY_SSLCERTTYPE - specify type of the proxy client SSL certificate
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLCERTTYPE, char *type);
Pass a pointer to a zero terminated string as parameter. The string should be
the format of your client certificate used when connecting to an HTTPS proxy.
Supported formats are "PEM" and "DER", except with Secure
Transport. OpenSSL (versions 0.9.3 and later) and Secure Transport (on iOS 5
or later, or OS X 10.7 or later) also support "P12" for
The application does not have to keep the string around after setting this
CURL *curl = curl_easy_init();
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_SSLCERTTYPE, "PEM");
curl_easy_setopt(curl, CURLOPT_PROXY_SSLKEY, "key.pem");
curl_easy_setopt(curl, CURLOPT_PROXY_KEYPASSWD, "s3cret");
ret = curl_easy_perform(curl);
Added in 7.52.0
If built TLS enabled.
Returns CURLE_OK if TLS is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.