.\" **************************************************************************
.\" *                                  _   _ ____  _
.\" *  Project                     ___| | | |  _ \| |
.\" *                             / __| | | | |_) | |
.\" *                            | (__| |_| |  _ <| |___
.\" *                             \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 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.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.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_SSH_PRIVATE_KEYFILE 3 "December 04, 2023" "ibcurl 8.5.0" libcurl

.SH NAME
CURLOPT_SSH_PRIVATE_KEYFILE \- private key file for SSH auth
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_PRIVATE_KEYFILE,
                          char *filename);
.SH DESCRIPTION
Pass a char * pointing to a \fIfilename\fP for your private key. If not used,
libcurl defaults to \fB$HOME/.ssh/id_rsa\fP or \fB$HOME/.ssh/id_dsa\fP if the
HOME environment variable is set, and just \fB"id_rsa"\fP or \fB"id_dsa"\fP in
the current directory if HOME is not set.

If the file is password-protected, set the password with
\fICURLOPT_KEYPASSWD(3)\fP.

The application does not have to keep the string around after setting this
option.
.SH DEFAULT
As explained above
.SH PROTOCOLS
SFTP and SCP
.SH EXAMPLE
.nf
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/file");
    curl_easy_setopt(curl, CURLOPT_SSH_PRIVATE_KEYFILE,
                     "/home/clarkkent/.ssh/id_rsa");
    curl_easy_setopt(curl, CURLOPT_KEYPASSWD, "password");
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
.fi
.SH AVAILABILITY
Added in 7.16.1
.SH 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.
.SH "SEE ALSO"
.BR CURLOPT_SSH_PUBLIC_KEYFILE (3),
.BR CURLOPT_SSH_AUTH_TYPES (3)