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CURLOPT_SSH_KNOWNHOSTS(3)           libcurl          CURLOPT_SSH_KNOWNHOSTS(3)


NAME

       CURLOPT_SSH_KNOWNHOSTS - file name holding the SSH known hosts


SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_KNOWNHOSTS, char *fname);


DESCRIPTION

       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 matches and mismatches.

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


DEFAULT

       NULL


PROTOCOLS

       SFTP and SCP


EXAMPLE

       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);
       }


AVAILABILITY

       Added in 7.19.6


RETURN VALUE

       Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if
       not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.


SEE ALSO

       CURLOPT_SSH_AUTH_TYPES(3), CURLOPT_SSH_HOST_PUBLIC_KEY_MD5(3),

ibcurl 8.1.2                    April 26, 2023       CURLOPT_SSH_KNOWNHOSTS(3)

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