GNURLOPT_PROXY_SSLCERT(3)

📦 version 7.72.0, in nixos 26.05, nixpkgs unstable

🌸 NAME 🌸

okay so bestie 💖 this page is GNURLOPT_PROXY_SSLCERT(3), and it lives in the curl_easy_setopt options manual — yes, that whole iconic crew. The actual star of the show:

  • CURLOPT_PROXY_SSLCERT — set SSL proxy client certificate ✨

🎀 SYNOPSIS 🎀

       #include <gnurl/curl.h>

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

✨ DESCRIPTION ✨

okay so vibe check first: this option is for connecting to an HTTPS proxy, not an HTTPS server. Periodt. 🚨

You pass a pointer to a null-terminated string as parameter. That string should be the file name 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 NSS or 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. iykyk 💅

When using a client certificate, you most likely also need to provide a private key with CURLOPT_PROXY_SSLKEY(3). And no cap: the application does not have to keep the string around after setting this option. 🫶

💖 DEFAULT 💖

NULL — empty, no cert, just vibes. ✨

🦋 PROTOCOLS 🦋

Used with HTTPS proxy. 🦋

🍓 EXAMPLE 🍓

here’s the iconic little setup, literally:

       CURL *curl = curl_easy_init();
       if(curl) {
         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");
         ret = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

👑 AVAILABILITY 👑

Added in 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 🌈

xoxo, your Unix bestie 💖 — from libcurl 7.52.0, dated 16 Nov 2016, on page GNURLOPT_PROXY_SSLCERT(3) 🌈

📦 where this page comes from