Unknown option: "-3" Unix manual page for CURLOPT_KEYPASSWD. (host=minya system=Darwin)
CURLOPT_KEYPASSWD(3)       curl_easy_setopt options       CURLOPT_KEYPASSWD(3)

NAME
       CURLOPT_KEYPASSWD - set passphrase to private key

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_KEYPASSWD, char *pwd);

DESCRIPTION
       Pass  a  pointer  to  a zero terminated string as parameter. It will be
       used as the password required to  use  the  CURLOPT_SSLKEY(3)  or  CUR-
       LOPT_SSH_PRIVATE_KEYFILE(3)  private  key.   You  never  needed  a pass
       phrase to load a certificate but you need one to load your private key.

       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.

EXAMPLE
       TODO

AVAILABILITY
       This option was known as CURLOPT_SSLKEYPASSWD up  to  7.16.4  and  CUR-
       LOPT_SSLCERTPASSWD up to 7.9.2.

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
       CURLOPT_SSLKEY(3), CURLOPT_SSH_PRIVATE_KEYFILE(3),

libcurl 7.54.0                 December 21, 2016          CURLOPT_KEYPASSWD(3)