curl/docs/libcurl/opts/CURLOPT_KEYPASSWD.md
Daniel Stenberg 0d6e5944bc
setopt: make CURLOPT_KEYPASSWD work for SSH-only builds
This option is used for both TLS and SSH so it needs to be handled
even in TLS-disabled builds

Mention this in the man page as well.

Follow-up to 52fa8d9
Pointed out by Codex Security
Closes #22121
2026-06-22 00:28:28 +02:00

83 lines
1.7 KiB
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_KEYPASSWD
Section: 3
Source: libcurl
See-also:
- CURLOPT_SSH_PRIVATE_KEYFILE (3)
- CURLOPT_SSLKEY (3)
Protocol:
- TLS
- SFTP
- SCP
TLS-backend:
- OpenSSL
- mbedTLS
- Schannel
- wolfSSL
Added-in: 7.17.0
---
# NAME
CURLOPT_KEYPASSWD - passphrase to private key
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_KEYPASSWD, char *pwd);
~~~
# DESCRIPTION
Pass a pointer to a null-terminated string as parameter. It is used as the
password required to use the CURLOPT_SSLKEY(3) or
CURLOPT_SSH_PRIVATE_KEYFILE(3) private key. You never need a passphrase to
load a certificate but you need one to load your private key.
The application does not have to keep the string around after setting this
option.
Using this option multiple times makes the last set string override the
previous ones. Set it to NULL to disable its use again.
# DEFAULT
NULL
# %PROTOCOLS%
# EXAMPLE
~~~c
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode result;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
curl_easy_setopt(curl, CURLOPT_SSLCERT, "client.pem");
curl_easy_setopt(curl, CURLOPT_SSLKEY, "key.pem");
curl_easy_setopt(curl, CURLOPT_KEYPASSWD, "superman");
result = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
~~~
# HISTORY
This option was known as CURLOPT_SSLKEYPASSWD up to 7.16.4 and
CURLOPT_SSLCERTPASSWD up to 7.9.2.
# %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).