curl/docs/libcurl/opts/CURLOPT_SSH_PRIVATE_KEYFILE.md
Daniel Stenberg e694c8284a
docs/libcurl/opts: clarify the return values
Expand a little.

- mention the type name of the return code
- avoid stating which exact return codes that might be returned, as that
  varies over time, builds and conditions
- avoid stating some always return OK
- refer to the manpage documenting all the return codes

Closes #15900
2025-01-02 17:13:33 +01:00

79 lines
1.8 KiB
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_SSH_PRIVATE_KEYFILE
Section: 3
Source: libcurl
See-also:
- CURLOPT_SSH_AUTH_TYPES (3)
- CURLOPT_SSH_PUBLIC_KEYFILE (3)
Protocol:
- SFTP
- SCP
Added-in: 7.16.1
---
# NAME
CURLOPT_SSH_PRIVATE_KEYFILE - private key file for SSH auth
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_PRIVATE_KEYFILE,
char *filename);
~~~
# DESCRIPTION
Pass a char pointer pointing to a *filename* for your private key. If not
used, libcurl defaults to **$HOME/.ssh/id_rsa** or **$HOME/.ssh/id_dsa** if
the HOME environment variable is set, and in the current directory if HOME is
not set.
If the file is password-protected, set the password with
CURLOPT_KEYPASSWD(3).
The SSH library derives the public key from this private key when possible. If
the SSH library cannot derive the public key from the private one and no
public one is provided with CURLOPT_SSH_PUBLIC_KEYFILE(3), the transfer
fails.
The application does not have to keep the string around after setting this
option.
# DEFAULT
As explained above
# %PROTOCOLS%
# EXAMPLE
~~~c
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);
}
}
~~~
# %AVAILABILITY%
# 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).