CURLOPT_SSH_PUBLIC_KEYFILE(3)                         Library Functions Manual

NAME
       CURLOPT_SSH_PUBLIC_KEYFILE - public key file for SSH auth

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_PUBLIC_KEYFILE,
                                 char *filename);

DESCRIPTION
       Pass a char pointer pointing to a filename for your public key. If not
       used, libcurl defaults to $HOME/.ssh/id_dsa.pub if the HOME environment
       variable is set, and just "id_dsa.pub" in the current directory if HOME
       is not set.

       If NULL (or an empty string) is passed to this option, libcurl passes
       no public key to the SSH library, which then rather derives it from the
       private key. If the SSH library cannot derive the public key from the
       private one and no public one is provided, the transfer fails.

       The application does not have to keep the string around after setting
       this option.

DEFAULT
       NULL

PROTOCOLS
       This functionality affects scp and sftp

EXAMPLE
       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/file");
           curl_easy_setopt(curl, CURLOPT_SSH_PUBLIC_KEYFILE,
                            "/home/clarkkent/.ssh/id_rsa.pub");
           res = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

HISTORY
       The "" trick was added in 7.26.0

AVAILABILITY
       Added in curl 7.16.1

RETURN VALUE
       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK (0) means everything was OK, non-zero means an error occurred,
       see libcurl-errors(3).

SEE ALSO
       CURLOPT_SSH_AUTH_TYPES(3), CURLOPT_SSH_PRIVATE_KEYFILE(3)

libcurl                           2025-02-13     CURLOPT_SSH_PUBLIC_KEYFILE(3)