CURLOPT_SSLKEY(3)          Library Functions Manual          CURLOPT_SSLKEY(3)

NAME
       CURLOPT_SSLKEY - private key file for TLS and SSL client cert

SYNOPSIS
       #include <curl/curl.h>

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

DESCRIPTION
       Pass a pointer to a null-terminated string as parameter. The string
       should be the filename of your private key. The default format is "PEM"
       and can be changed with CURLOPT_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_SSLCERT, "client.pem");
           curl_easy_setopt(curl, CURLOPT_SSLKEY, "key.pem");
           curl_easy_setopt(curl, CURLOPT_KEYPASSWD, "s3cret");
           res = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY
       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_SSLCERT(3), CURLOPT_SSLKEYTYPE(3), CURLOPT_SSLKEY_BLOB(3)

libcurl                          April 26 2024               CURLOPT_SSLKEY(3)