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.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.haxx.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" **************************************************************************
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.\"
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.TH CURLINFO_TLS_SESSION 3 "12 Sep 2015" "libcurl 7.44.0" "curl_easy_getinfo options"
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.SH NAME
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CURLINFO_TLS_SESSION \- get TLS session info
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_TLS_SESSION,
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struct curl_tlssessioninfo **session);
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.SH DESCRIPTION
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Pass a pointer to a 'struct curl_tlssessioninfo *'. The pointer will be
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initialized to refer to a 'struct curl_tlssessioninfo *' that will contain an
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enum indicating the SSL library used for the handshake and the respective
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internal TLS session structure of this underlying SSL library.
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This may then be used to extract certificate information in a format
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convenient for further processing, such as manual validation. NOTE: this
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option may not be available for all SSL backends; unsupported SSL backends
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will always return NULL in the \fIinternals\fP pointer to indicate that they
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are not supported.
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.nf
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struct curl_tlssessioninfo {
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curl_sslbackend backend;
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void *internals;
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};
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.fi
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2015-09-22 11:21:37 -04:00
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The \fIbackend\fP struct member is one of the defines in the CURLSSLBACKEND_*
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series: CURLSSLBACKEND_NONE (when built without TLS support),
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CURLSSLBACKEND_OPENSSL, CURLSSLBACKEND_GNUTLS, CURLSSLBACKEND_NSS,
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CURLSSLBACKEND_GSKIT, CURLSSLBACKEND_POLARSSL, CURLSSLBACKEND_CYASSL,
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CURLSSLBACKEND_SCHANNEL, CURLSSLBACKEND_DARWINSSL or
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CURLSSLBACKEND_AXTLS. (Note that the OpenSSL forks are all reported as just
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OpenSSL here.)
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2015-09-12 17:13:08 -04:00
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The \fIinternals\fP struct member will point to a TLS library specific pointer
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with the following underlying types:
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.RS
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.IP OpenSSL
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SSL_CTX *
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.IP GnuTLS
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gnutls_session_t
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.IP NSS
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PRFileDesc *
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.IP gskit
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gsk_handle
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.RE
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.SH PROTOCOLS
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All TLS-based
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.SH EXAMPLE
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TODO
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.SH AVAILABILITY
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Added in 7.34.0
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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.SH "SEE ALSO"
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.BR curl_easy_getinfo "(3), " curl_easy_setopt "(3), "
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