**************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
**************************************************************************

CURLOPT_SSH_KNOWNHOSTS - file name holding the SSH known hosts #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_KNOWNHOSTS, char *fname); Pass a pointer to a null-terminated string holding the file name of the known_host file to use. The known_hosts file should use the OpenSSH file format as supported by libssh2. If this file is specified, libcurl will only accept connections with hosts that are known and present in that file, with a matching public key. Use CURLOPT_SSH_KEYFUNCTION(3) to alter the default behavior on host and key (mis)matching. The application does not have to keep the string around after setting this option. NULL SFTP and SCP

CURL *curl = curl_easy_init();
if(curl) {
 curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/file");
 curl_easy_setopt(curl, CURLOPT_SSH_KNOWNHOSTS,
 "/home/clarkkent/.ssh/known_hosts");
 ret = curl_easy_perform(curl);
 curl_easy_cleanup(curl);
}

Added in 7.19.6 Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space. CURLOPT_SSH_AUTH_TYPES "(3), " CURLOPT_SSH_HOST_PUBLIC_KEY_MD5 "(3), "