DragonFly On-Line Manual Pages
CURLOPT_SSLKEY(3) curl_easy_setopt options CURLOPT_SSLKEY(3)
CURLOPT_SSLKEY - private keyfile for TLS and SSL client cert
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLKEY, char *keyfile);
Pass a pointer to a null-terminated string as parameter. The string
should be the file name 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 keychain or PKCS#12 file containing the
The application does not have to keep the string around after setting
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
CURL *curl = curl_easy_init();
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");
ret = curl_easy_perform(curl);
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.
libcurl 7.83.1 March 12, 2022 CURLOPT_SSLKEY(3)