curl/docs/libcurl/opts/CURLOPT_PROXY_SSLCERT.md
Daniel Stenberg 08a3e8e19a
TLS: remove support for Secure Transport and BearSSL
These libraries do not support TLS 1.3 and have been marked for removal
for over a year. We want to help users select a TLS dependency that is
future-proof and reliable, and not supporting TLS 1.3 in 2025 does not
infer confidence. Users who build libcurl are likely to be served better
and get something more future-proof with a TLS library that supports
1.3.

Closes #16677
2025-06-11 07:54:19 +02:00

84 lines
1.9 KiB
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_PROXY_SSLCERT
Section: 3
Source: libcurl
See-also:
- CURLOPT_PROXY_SSLCERTTYPE (3)
- CURLOPT_PROXY_SSLKEY (3)
- CURLOPT_SSLCERT (3)
Protocol:
- TLS
TLS-backend:
- OpenSSL
- GnuTLS
- mbedTLS
- Schannel
- wolfSSL
Added-in: 7.52.0
---
# NAME
CURLOPT_PROXY_SSLCERT - HTTPS proxy client certificate
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLCERT, char *cert);
~~~
# DESCRIPTION
This option is for connecting to an HTTPS proxy, not an HTTPS server.
Pass a pointer to a null-terminated string as parameter. The string should be
the filename of your client certificate used to connect to the HTTPS proxy.
The default format "PEM", and can be changed with
CURLOPT_PROXY_SSLCERTTYPE(3).
When using a client certificate, you most likely also need to provide a
private key with CURLOPT_PROXY_SSLKEY(3).
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 res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
curl_easy_setopt(curl, CURLOPT_PROXY, "https://proxy");
curl_easy_setopt(curl, CURLOPT_PROXY_SSLCERT, "client.pem");
curl_easy_setopt(curl, CURLOPT_PROXY_SSLKEY, "key.pem");
curl_easy_setopt(curl, CURLOPT_PROXY_KEYPASSWD, "s3cret");
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).