Tribblix: manual page: CURLOPT_SSH

CURLOPT_SSH_KEYDATA(3) Introduction to Library Functions

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).