NAME

CURLOPT_SSH_KEYDATA - pointer passed to the SSH key callback

SYNOPSIS

#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_KEYDATA, void *pointer);

DESCRIPTION

Pass a void * as parameter. This pointer is passed along verbatim to the callback set with CURLOPT_SSH_KEYFUNCTION(3).

DEFAULT

NULL

PROTOCOLS

This functionality affects scp and sftp

EXAMPLE

struct mine {


  void *custom;
};
static int keycb(CURL *easy,


                 const struct curl_khkey *knownkey,


                 const struct curl_khkey *foundkey,


                 enum curl_khmatch match,


                 void *clientp)
{


  /* 'clientp' points to the callback_data struct */


  /* investigate the situation and return the correct value */


  return CURLKHSTAT_FINE_ADD_TO_FILE;
}
int main(void)
{


  CURL *curl = curl_easy_init();


  if(curl) {


    struct mine callback_data;


    curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/thisfile.txt");


    curl_easy_setopt(curl, CURLOPT_SSH_KEYFUNCTION, keycb);


    curl_easy_setopt(curl, CURLOPT_SSH_KEYDATA, &callback_data);


    curl_easy_setopt(curl, CURLOPT_SSH_KNOWNHOSTS, "/home/user/known_hosts");


    curl_easy_perform(curl);


  }
}

AVAILABILITY

Added in curl 7.19.6

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).