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

       This functionality affects 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

       Added in curl 7.9.3

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                                            2024-12-11                                  CURLOPT_SSLKEY(3)