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/* ====================================================================
* Copyright 2004 Paul Querna
*
* Licensed 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.
*
*/
#ifndef __mod_gnutls_h_inc
#define __mod_gnutls_h_inc
#include "httpd.h"
#include "http_config.h"
#include "http_protocol.h"
#include "http_connection.h"
#include "http_core.h"
#include "http_log.h"
#include "apr_buckets.h"
#include "apr_strings.h"
#include "apr_tables.h"
#include <gcrypt.h>
#include <gnutls/gnutls.h>
module AP_MODULE_DECLARE_DATA gnutls_module;
#define GNUTLS_OUTPUT_FILTER_NAME "gnutls_output_filter"
#define GNUTLS_INPUT_FILTER_NAME "gnutls_input_filter"
#define GNUTLS_ENABLED_FALSE 0
#define GNUTLS_ENABLED_TRUE 1
/**
* GnuTLS changed the names of several structures between 1.0.X and 1.1.X
* This is just a simple hack so we can compile with both versions.
* There is a full list in <gnutls/compat.h>, But I am just
* doing this for a few types we use.
*/
#ifndef gnutls_certificate_credentials_t
#define gnutls_certificate_credentials_t gnutls_certificate_credentials
#define gnutls_anon_server_credentials_t gnutls_anon_server_credentials
#define gnutls_session_t gnutls_session
#define gnutls_transport_ptr_t gnutls_transport_ptr
#define gnutls_dh_params_t gnutls_dh_params
#define gnutls_rsa_params_t gnutls_rsa_params
#endif
typedef struct
{
gnutls_certificate_credentials_t certs;
gnutls_anon_server_credentials_t anoncred;
char *key_file;
char *cert_file;
int enabled;
int ciphers[16];
int key_exchange[16];
int macs[16];
int protocol[16];
int compression[16];
} mod_gnutls_srvconf_rec;
typedef struct {
int length;
char *value;
} mod_gnutls_char_buffer_t;
typedef struct
{
mod_gnutls_srvconf_rec *sc;
conn_rec* c;
gnutls_session_t session;
apr_status_t input_rc;
ap_filter_t *input_filter;
apr_bucket_brigade *input_bb;
apr_read_type_e input_block;
ap_input_mode_t input_mode;
mod_gnutls_char_buffer_t input_cbuf;
char input_buffer[AP_IOBUFSIZE];
apr_status_t output_rc;
ap_filter_t *output_filter;
apr_bucket_brigade *output_bb;
char output_buffer[AP_IOBUFSIZE];
apr_size_t output_blen;
apr_size_t output_length;
int status;
int non_https;
} mod_gnutls_handle_t;
/** Functions in gnutls_io.c **/
/**
* mod_gnutls_filter_input will filter the input data
* by decrypting it using GnuTLS and passes it cleartext.
*
* @param f the filter info record
* @param bb the bucket brigade, where to store the result to
* @param mode what shall we read?
* @param block a block index we shall read from?
* @return result status
*/
apr_status_t mod_gnutls_filter_input(ap_filter_t * f,
apr_bucket_brigade * bb,
ap_input_mode_t mode,
apr_read_type_e block,
apr_off_t readbytes);
/**
* mod_gnutls_filter_output will filter the encrypt
* the incoming bucket using GnuTLS and passes it onto the next filter.
*
* @param f the filter info record
* @param bb the bucket brigade, where to store the result to
* @return result status
*/
apr_status_t mod_gnutls_filter_output(ap_filter_t * f,
apr_bucket_brigade * bb);
/**
* mod_gnutls_transport_read is called from GnuTLS to provide encrypted
* data from the client.
*
* @param ptr pointer to the filter context
* @param buffer place to put data
* @param len maximum size
* @return size length of the data stored in buffer
*/
ssize_t mod_gnutls_transport_read(gnutls_transport_ptr_t ptr,
void *buffer, size_t len);
/**
* mod_gnutls_transport_write is called from GnuTLS to
* write data to the client.
*
* @param ptr pointer to the filter context
* @param buffer buffer to write to the client
* @param len size of the buffer
* @return size length of the data written
*/
ssize_t mod_gnutls_transport_write(gnutls_transport_ptr_t ptr,
const void *buffer, size_t len);
#endif /* __mod_gnutls_h_inc */
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