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---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: CURLINFO_SSL_ENGINES
Section: 3
Source: libcurl
See-also:
- CURLOPT_SSLENGINE (3)
- curl_easy_getinfo (3)
- curl_easy_setopt (3)
Protocol:
- TLS
TLS-backend:
- OpenSSL
Added-in: 7.12.3
---
# NAME
CURLINFO_SSL_ENGINES - an slist of OpenSSL crypto-engines
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SSL_ENGINES,
struct curl_slist **engine_list);
~~~
# DESCRIPTION
Pass the address of a 'struct curl_slist *' to receive a linked-list of
OpenSSL crypto-engines supported. Note that engines are normally implemented
in separate dynamic libraries. Hence not all the returned engines may be
available at runtime. **NOTE:** you must call curl_slist_free_all(3)
on the list pointer once you are done with it, as libcurl does not free this
data for you.
# %PROTOCOLS%
# EXAMPLE
~~~c
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode result;
struct curl_slist *engines;
result = curl_easy_getinfo(curl, CURLINFO_SSL_ENGINES, &engines);
if((result == CURLE_OK) && engines) {
/* we have a list, free it when done using it */
curl_slist_free_all(engines);
}
curl_easy_cleanup(curl);
}
}
~~~
# %AVAILABILITY%
# RETURN VALUE
curl_easy_getinfo(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).
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