<directivesynopsis>

<name>ProxyAJPForwardSSLCertChain</name>

<description>Whether to send the client's SSL certificate chain</description>

<syntax>ProxyAJPForwardSSLCertChain on|off</syntax>

<default>ProxyAJPForwardSSLCertChain off</default>

<contextlist><context>server config</context>

<context>virtual host</context></contextlist>

<compatibility>Available in Apache ? and later</compatibility>

<usage>

<p>This directive controls whether the client's SSL certificate chain (the

client's certificate and all intermediate certificates) or only the client's

certificate (without any intermediate certificates) will be sent to the AJP

server when proxying an incoming SSL connection. If <code>on</code>, the SSL

certificate chain will be sent.</p>

<p>This is disabled by default because the default AJP message buffers in both

mod_proxy_ajp and Tomcat are not large enough to hold a long certificate chain

(more than 1 or 2 intermediate certificates), so clients having a long chain

will get errors if this is enabled without first adjusting the AJP message

buffer sizes appropriately.</p>

<p>To adjust the AJP message buffer size in mod_proxy_ajp, use the

<directive module="mod_proxy">ProxyIOBufferSize</directive> directive. The

specified size should be large enough to hold the client's (PEM-encoded)

certificate and all (PEM-encoded) intermediate certificates, plus 400 bytes or

so for other AJP request data. The minimum size is 8192, the maximum is 65536,

and the default is 8192.</p>

<p>To adjust the AJP message buffer size in Tomcat, specify the

<code>packetSize</code> attribute in the AJP connector declaration. The same

buffer size should be used for both mod_proxy_ajp and Tomcat.</p>

<p>Note that support for processing of intermediate certificates is only

available in Tomcat 5.5.28+ and 6.0.21+ (earlier versions will simply ignore

the intermediate certificates in the AJP request), and the

<code>packetSize</code> attribute is only available in Tomcat 5.5.20+ and

6.0.2+ (earlier versions had a fixed buffer size of 8192 bytes).</p>

</usage>

</directivesynopsis>

/* 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.

 */

#ifndef AJP_CONFIG_H

#define AJP_CONFIG_H

/**

 * @file  ajp_config.h

 * @brief AJP internal configuration management.

 *

 * @defgroup AJP_config AJP configuration

 * @ingroup  MOD_PROXY

 * @{

 */

#ifndef BOOL

#define BOOL unsigned char

#endif

#ifndef FALSE

#define FALSE (0)

#endif

#ifndef TRUE

#define TRUE (!FALSE)

#endif

typedef struct {

    BOOL send_cert_chain;

    BOOL send_cert_chain_set;

} proxy_ajp_conf;

extern module AP_MODULE_DECLARE_DATA proxy_ajp_module;

#endif /*AJP_CONFIG_H*/

/** @} */

#define AJP13_SSL_CLIENT_CHAIN_PREFIX   "SSL_CLIENT_CERT_CHAIN_"

#include "ajp_config.h"

static void *create_proxy_ajp_config(apr_pool_t *p, server_rec *s)

{

    proxy_ajp_conf *c = apr_pcalloc(p, sizeof(proxy_ajp_conf));

    c->send_cert_chain = FALSE;

    c->send_cert_chain_set = FALSE;

    return c;

}

static void *merge_proxy_ajp_config(apr_pool_t *p, void *basev, void *overridesv)

{

    proxy_ajp_conf *c = apr_pcalloc(p, sizeof(proxy_ajp_conf));

    proxy_ajp_conf *base = (proxy_ajp_conf *) basev;

    proxy_ajp_conf *overrides = (proxy_ajp_conf *) overridesv;

    c->send_cert_chain = (overrides->send_cert_chain_set ?

                          overrides->send_cert_chain : base->send_cert_chain);

    c->send_cert_chain_set = (base->send_cert_chain_set ||

                              overrides->send_cert_chain_set);

    return c;

}

static const char *

    set_forward_cert_chain(cmd_parms *params, void *dummy, const char *arg)

{

    proxy_ajp_conf *c =

        ap_get_module_config(params->server->module_config, &proxy_ajp_module);

    if (strcasecmp(arg, "Off") == 0)

        c->send_cert_chain = FALSE;

    else if (strcasecmp(arg, "On") == 0)

        c->send_cert_chain = TRUE;

    else

        return "ProxyAJPForwardSSLCertChain must be one of: On | Off";

    c->send_cert_chain_set = TRUE;

    return NULL;

}

static const command_rec proxy_ajp_cmds[] =

{

    AP_INIT_TAKE1("ProxyAJPForwardSSLCertChain", set_forward_cert_chain, NULL,

                  RSRC_CONF, "Forward the entire SSL Certificate Chain "

                  "('on', 'off')"),

    {NULL}

};

#include "ajp_config.h"

    proxy_ajp_conf *sc =

        ap_get_module_config(r->server->module_config, &proxy_ajp_module);

            /* If ProxyAJPForwardSSLCertChain is set, send the entire chain */

            if (sc->send_cert_chain) {

                apr_array_header_t *certs = apr_array_make(r->pool, 1, sizeof(char *));

                int i = 0;

                char *envvar_name;

                do {

                  *(const char **)apr_array_push(certs) = envvar;

                  envvar_name = apr_psprintf(r->pool, "%s%d",

                                             AJP13_SSL_CLIENT_CHAIN_PREFIX, i);

                  envvar = ap_proxy_ssl_val(r->pool, r->server, r->connection, r,

                                            envvar_name);

                  i++;

                } while (envvar && envvar[0]);

                envvar = apr_array_pstrcat(r->pool, certs, '\0');

            }