1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Title: CURLOPT_SSH_KNOWNHOSTS 5Section: 3 6Source: libcurl 7See-also: 8 - CURLOPT_SSH_AUTH_TYPES (3) 9 - CURLOPT_SSH_HOST_PUBLIC_KEY_MD5 (3) 10Protocol: 11 - SFTP 12 - SCP 13--- 14 15# NAME 16 17CURLOPT_SSH_KNOWNHOSTS - filename holding the SSH known hosts 18 19# SYNOPSIS 20 21~~~c 22#include <curl/curl.h> 23 24CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_KNOWNHOSTS, char *fname); 25~~~ 26 27# DESCRIPTION 28 29Pass a pointer to a null-terminated string holding the filename of the 30known_host file to use. The known_hosts file should use the OpenSSH file 31format as supported by libssh2. If this file is specified, libcurl only 32accepts connections with hosts that are known and present in that file, with a 33matching public key. Use CURLOPT_SSH_KEYFUNCTION(3) to alter the default 34behavior on host and key matches and mismatches. 35 36The application does not have to keep the string around after setting this 37option. 38 39# DEFAULT 40 41NULL 42 43# EXAMPLE 44 45~~~c 46int main(void) 47{ 48 CURL *curl = curl_easy_init(); 49 if(curl) { 50 CURLcode res; 51 curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/file"); 52 curl_easy_setopt(curl, CURLOPT_SSH_KNOWNHOSTS, 53 "/home/clarkkent/.ssh/known_hosts"); 54 res = curl_easy_perform(curl); 55 curl_easy_cleanup(curl); 56 } 57} 58~~~ 59 60# AVAILABILITY 61 62Added in 7.19.6 63 64# RETURN VALUE 65 66Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or 67CURLE_OUT_OF_MEMORY if there was insufficient heap space. 68