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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file mod_ssl_openssl.h
* @brief Interface to OpenSSL-specific APIs provided by mod_ssl
*
* @defgroup MOD_SSL mod_ssl_openssl
* @ingroup APACHE_MODS
* @{
*/
#ifndef __MOD_SSL_OPENSSL_H__
#define __MOD_SSL_OPENSSL_H__
#include "mod_ssl.h"
/* OpenSSL headers */
#include <openssl/opensslv.h>
#if OPENSSL_VERSION_NUMBER >= 0x30000000
#include <openssl/macros.h> /* for OPENSSL_API_LEVEL */
#endif
#if OPENSSL_VERSION_NUMBER >= 0x10001000
/* must be defined before including ssl.h */
#define OPENSSL_NO_SSL_INTERN
#endif
#include <openssl/ssl.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
/**
* init_server hook -- allow SSL_CTX-specific initialization to be performed by
* a module for each SSL-enabled server (one at a time)
* @param s SSL-enabled [virtual] server
* @param p pconf pool
* @param is_proxy 1 if this server supports backend connections
* over SSL/TLS, 0 if it supports client connections over SSL/TLS
* @param ctx OpenSSL SSL Context for the server
*/
APR_DECLARE_EXTERNAL_HOOK(ssl, SSL, int, init_server,
(server_rec *s, apr_pool_t *p, int is_proxy, SSL_CTX *ctx))
/**
* pre_handshake hook
* @param c conn_rec for new connection from client or to backend server
* @param ssl OpenSSL SSL Connection for the client or backend server
* @param is_proxy 1 if this handshake is for a backend connection, 0 otherwise
*/
APR_DECLARE_EXTERNAL_HOOK(ssl, SSL, int, pre_handshake,
(conn_rec *c, SSL *ssl, int is_proxy))
/**
* proxy_post_handshake hook -- allow module to abort after successful
* handshake with backend server and subsequent peer checks
* @param c conn_rec for connection to backend server
* @param ssl OpenSSL SSL Connection for the client or backend server
*/
APR_DECLARE_EXTERNAL_HOOK(ssl, SSL, int, proxy_post_handshake,
(conn_rec *c, SSL *ssl))
/** On TLS connections that do not relate to a configured virtual host,
* allow other modules to provide a X509 certificate and EVP_PKEY to
* be used on the connection. This first hook which does not
* return DECLINED will determine the outcome. */
APR_DECLARE_EXTERNAL_HOOK(ssl, SSL, int, answer_challenge,
(conn_rec *c, const char *server_name,
X509 **pcert, EVP_PKEY **pkey))
/** During post_config phase, ask around if someone wants to provide
* OCSP stapling status information for the given cert (with the also
* provided issuer certificate). The first hook which does not
* return DECLINED promises to take responsibility (and respond
* in later calls via hook ssl_get_stapling_status).
* If no hook takes over, mod_ssl's own stapling implementation will
* be applied (if configured).
*/
APR_DECLARE_EXTERNAL_HOOK(ssl, SSL, int, init_stapling_status,
(server_rec *s, apr_pool_t *p,
X509 *cert, X509 *issuer))
/** Anyone answering positive to ssl_init_stapling_status for a
* certificate, needs to register here and supply the actual OCSP stapling
* status data (OCSP_RESP) for a new connection.
* A hook supplying the response data must return APR_SUCCESS.
* The data is returned in DER encoded bytes via pder and pderlen. The
* returned pointer may be NULL, which indicates that data is (currently)
* unavailable.
* If DER data is returned, it MUST come from a response with
* status OCSP_RESPONSE_STATUS_SUCCESSFUL and V_OCSP_CERTSTATUS_GOOD
* or V_OCSP_CERTSTATUS_REVOKED, not V_OCSP_CERTSTATUS_UNKNOWN. This means
* errors in OCSP retrieval are to be handled/logged by the hook and
* are not done by mod_ssl.
* Any DER bytes returned MUST be allocated via malloc() and ownership
* passes to mod_ssl. Meaning, the hook must return a malloced copy of
* the data it has. mod_ssl (or OpenSSL) will free it.
*/
APR_DECLARE_EXTERNAL_HOOK(ssl, SSL, int, get_stapling_status,
(unsigned char **pder, int *pderlen,
conn_rec *c, server_rec *s, X509 *cert))
#endif /* __MOD_SSL_OPENSSL_H__ */
/** @} */
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