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53f97e1e91
- Crypto library - SSL library - PKCS#11 support For missing features, please see README.polarssl Signed-off-by: Adriaan de Jong <dejong@fox-it.com> Acked-by: James Yonan <james@openvpn.net> Acked-by: Gert Doering <gert@greenie.muc.de> Signed-off-by: David Sommerseth <davids@redhat.com>
80 lines
3.2 KiB
C
80 lines
3.2 KiB
C
/*
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* OpenVPN -- An application to securely tunnel IP networks
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* over a single TCP/UDP port, with support for SSL/TLS-based
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* session authentication and key exchange,
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* packet encryption, packet authentication, and
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* packet compression.
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*
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* Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
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* Copyright (C) 2010 Fox Crypto B.V. <openvpn@fox-it.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see the file COPYING included with this
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* distribution); if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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* @file Control Channel Verification Module PolarSSL backend
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*/
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#ifndef SSL_VERIFY_POLARSSL_H_
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#define SSL_VERIFY_POLARSSL_H_
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#include "syshead.h"
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#include "misc.h"
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#include "manage.h"
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#include <polarssl/x509.h>
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typedef x509_cert x509_cert_t;
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/** @name Function for authenticating a new connection from a remote OpenVPN peer
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* @{ */
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/**
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* Verify that the remote OpenVPN peer's certificate allows setting up a
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* VPN tunnel.
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* @ingroup control_tls
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*
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* This callback function is called when a new TLS session is being setup to
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* determine whether the remote OpenVPN peer's certificate is allowed to
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* connect. It is called for once for every certificate in the chain. The
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* callback functionality is configured in the \c init_ssl() function, which
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* calls the PolarSSL library's \c ssl_set_verify_callback() function with \c
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* verify_callback() as its callback argument.
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*
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* It checks preverify_ok, and registers the certificate hash. If these steps
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* succeed, it calls the \c verify_cert() function, which performs
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* OpenVPN-specific verification.
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*
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* @param session_obj - The OpenVPN \c tls_session associated with this object,
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* as set during SSL session setup.
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* @param cert - The certificate used by PolarSSL.
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* @param cert_depth - The depth of the current certificate in the chain, with
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* 0 being the actual certificate.
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* @param preverify_ok - Whether the remote OpenVPN peer's certificate
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* past verification. A value of 1 means it
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* verified successfully, 0 means it failed.
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*
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* @return The return value indicates whether the supplied certificate is
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* allowed to set up a VPN tunnel. The following values can be
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* returned:
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* - \c 0: failure, this certificate is not allowed to connect.
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* - \c 1: success, this certificate is allowed to connect.
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*/
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int verify_callback (void *session_obj, x509_cert *cert, int cert_depth,
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int preverify_ok);
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/** @} name Function for authenticating a new connection from a remote OpenVPN peer */
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#endif /* SSL_VERIFY_POLARSSL_H_ */
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