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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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.haxx.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.
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_TLS_SSL_PTR 3 "23 Feb 2016" "libcurl 7.48.0" "curl_easy_getinfo options"
.SH NAME
CURLINFO_TLS_SESSION, CURLINFO_TLS_SSL_PTR \- get TLS session info
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_TLS_SSL_PTR,
struct curl_tlssessioninfo **session);
/* if you need compatibility with libcurl < 7.48.0 use
CURLINFO_TLS_SESSION instead: */
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_TLS_SESSION,
struct curl_tlssessioninfo **session);
.SH DESCRIPTION
Pass a pointer to a 'struct curl_tlssessioninfo *'. The pointer will be
initialized to refer to a 'struct curl_tlssessioninfo *' that will contain an
enum indicating the SSL library used for the handshake and a pointer to the
respective internal TLS session structure of this underlying SSL library.
This may then be used to extract certificate information in a format
convenient for further processing, such as manual validation. NOTE: this
option may not be available for all SSL backends; unsupported SSL backends
will always return NULL in the \fIinternals\fP pointer to indicate that they
are not supported.
.nf
struct curl_tlssessioninfo {
curl_sslbackend backend;
void *internals;
};
.fi
The \fIbackend\fP struct member is one of the defines in the CURLSSLBACKEND_*
series: CURLSSLBACKEND_NONE (when built without TLS support),
CURLSSLBACKEND_AXTLS, CURLSSLBACKEND_CYASSL, CURLSSLBACKEND_DARWINSSL,
CURLSSLBACKEND_GNUTLS, CURLSSLBACKEND_GSKIT, CURLSSLBACKEND_MBEDTLS,
CURLSSLBACKEND_NSS, CURLSSLBACKEND_OPENSSL, CURLSSLBACKEND_POLARSSL or
CURLSSLBACKEND_SCHANNEL. (Note that the OpenSSL forks are all reported as just
OpenSSL here.)
The \fIinternals\fP struct member will point to a TLS library specific pointer
for the active ("in use") SSL connection, with the following underlying types:
.RS
.IP GnuTLS
gnutls_session_t
.IP gskit
gsk_handle
.IP NSS
PRFileDesc *
.IP OpenSSL
CURLINFO_TLS_SESSION: SSL_CTX *
CURLINFO_TLS_SSL_PTR: SSL *
.RE
Since 7.48.0 the \fIinternals\fP member can point to these other SSL backends
as well:
.RS
.IP axTLS
SSL *
.IP mbedTLS
mbedtls_ssl_session *
.IP PolarSSL
ssl_session *
.IP Secure Channel ("WinSSL")
CtxtHandle *
.IP Secure Transport ("DarwinSSL")
SSLContext *
.IP wolfSSL ("CyaSSL")
SSL *
.RE
.SH PROTOCOLS
All TLS-based
.SH EXAMPLE
TODO
.SH AVAILABILITY
Added in 7.48.0.
This option supersedes \fICURLINFO_TLS_SESSION(3)\fP which was added in 7.34.0.
This option is exactly the same as that option except in the case of OpenSSL.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo "(3), " curl_easy_setopt "(3), "
.BR CURLINFO_TLS_SESSION "(3), "
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