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/* Copyright 2002-2005 The Apache Software Foundation or its licensors, as
* applicable.
*
* 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.
*/
#include "apr_strings.h"
#define APR_WANT_STRFUNC /* for strcasecmp */
#include "apr_want.h"
#define CORE_PRIVATE
#include "ap_config.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_request.h"
#include "ap_provider.h"
#include "mod_auth.h"
typedef struct provider_alias_rec {
char *provider_name;
char *provider_alias;
ap_conf_vector_t *sec_auth;
const authn_provider *provider;
} provider_alias_rec;
typedef struct authn_alias_srv_conf {
apr_hash_t *alias_rec;
} authn_alias_srv_conf;
module AP_MODULE_DECLARE_DATA authn_alias_module;
static authn_status authn_alias_check_password(request_rec *r, const char *user,
const char *password)
{
/* Look up the provider alias in the alias list */
/* Get the the dir_config and call ap_Merge_per_dir_configs() */
/* Call the real provider->check_password() function */
/* return the result of the above function call */
const char *provider_name = apr_table_get(r->notes, AUTHN_PROVIDER_NAME_NOTE);
authn_status ret = AUTH_USER_NOT_FOUND;
authn_alias_srv_conf *authcfg =
(authn_alias_srv_conf *)ap_get_module_config(r->server->module_config,
&authn_alias_module);
if (provider_name) {
provider_alias_rec *prvdraliasrec = apr_hash_get(authcfg->alias_rec,
provider_name, APR_HASH_KEY_STRING);
ap_conf_vector_t *orig_dir_config = r->per_dir_config;
/* If we found the alias provider in the list, then merge the directory
configurations and call the real provider */
if (prvdraliasrec) {
r->per_dir_config = ap_merge_per_dir_configs(r->pool, orig_dir_config,
prvdraliasrec->sec_auth);
ret = prvdraliasrec->provider->check_password(r,user,password);
r->per_dir_config = orig_dir_config;
}
}
return ret;
}
static authn_status authn_alias_get_realm_hash(request_rec *r, const char *user,
const char *realm, char **rethash)
{
/* Look up the provider alias in the alias list */
/* Get the the dir_config and call ap_Merge_per_dir_configs() */
/* Call the real provider->get_realm_hash() function */
/* return the result of the above function call */
const char *provider_name = apr_table_get(r->notes, AUTHN_PROVIDER_NAME_NOTE);
authn_status ret = AUTH_USER_NOT_FOUND;
authn_alias_srv_conf *authcfg =
(authn_alias_srv_conf *)ap_get_module_config(r->server->module_config,
&authn_alias_module);
if (provider_name) {
provider_alias_rec *prvdraliasrec = apr_hash_get(authcfg->alias_rec,
provider_name, APR_HASH_KEY_STRING);
ap_conf_vector_t *orig_dir_config = r->per_dir_config;
/* If we found the alias provider in the list, then merge the directory
configurations and call the real provider */
if (prvdraliasrec) {
r->per_dir_config = ap_merge_per_dir_configs(r->pool, orig_dir_config,
prvdraliasrec->sec_auth);
ret = prvdraliasrec->provider->get_realm_hash(r,user,realm,rethash);
r->per_dir_config = orig_dir_config;
}
}
return ret;
}
static void *create_authn_alias_svr_config(apr_pool_t *p, server_rec *s)
{
authn_alias_srv_conf *authcfg;
authcfg = (authn_alias_srv_conf *) apr_pcalloc(p, sizeof(authn_alias_srv_conf));
authcfg->alias_rec = apr_hash_make(p);
return (void *) authcfg;
}
static const authn_provider authn_alias_provider =
{
&authn_alias_check_password,
&authn_alias_get_realm_hash,
};
static const char *authaliassection(cmd_parms *cmd, void *mconfig, const char *arg)
{
int old_overrides = cmd->override;
const char *endp = ap_strrchr_c(arg, '>');
const char *args;
char *provider_alias;
char *provider_name;
const char *errmsg;
ap_conf_vector_t *new_auth_config = ap_create_per_dir_config(cmd->pool);
authn_alias_srv_conf *authcfg =
(authn_alias_srv_conf *)ap_get_module_config(cmd->server->module_config,
&authn_alias_module);
const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
if (err != NULL) {
return err;
}
if (endp == NULL) {
return apr_pstrcat(cmd->pool, cmd->cmd->name,
"> directive missing closing '>'", NULL);
}
args = apr_pstrndup(cmd->pool, arg, endp - arg);
if (!args[0]) {
return apr_pstrcat(cmd->pool, cmd->cmd->name,
"> directive requires additional arguments", NULL);
}
/* Pull the real provider name and the alias name from the block header */
provider_name = ap_getword_conf(cmd->pool, &args);
provider_alias = ap_getword_conf(cmd->pool, &args);
if (!provider_name[0] || !provider_alias[0]) {
return apr_pstrcat(cmd->pool, cmd->cmd->name,
"> directive requires additional arguments", NULL);
}
/* walk the subsection configuration to get the per_dir config that we will
merge just before the real provider is called. */
cmd->override = OR_ALL|ACCESS_CONF;
errmsg = ap_walk_config(cmd->directive->first_child, cmd, new_auth_config);
if (!errmsg) {
provider_alias_rec *prvdraliasrec = apr_pcalloc(cmd->pool, sizeof(provider_alias_rec));
const authn_provider *provider = ap_lookup_provider(AUTHN_PROVIDER_GROUP, provider_name,"0");
/* Save off the new directory config along with the original provider name
and function pointer data */
prvdraliasrec->sec_auth = new_auth_config;
prvdraliasrec->provider_name = provider_name;
prvdraliasrec->provider_alias = provider_alias;
prvdraliasrec->provider = provider;
apr_hash_set(authcfg->alias_rec, provider_alias, APR_HASH_KEY_STRING, prvdraliasrec);
/* Register the fake provider so that we get called first */
ap_register_provider(cmd->pool, AUTHN_PROVIDER_GROUP, provider_alias, "0",
&authn_alias_provider);
}
cmd->override = old_overrides;
return errmsg;
}
static const command_rec authn_alias_cmds[] =
{
AP_INIT_RAW_ARGS("<AuthnProviderAlias", authaliassection, NULL, RSRC_CONF,
"Container for authentication directives grouped under "
"a provider alias"),
{NULL}
};
module AP_MODULE_DECLARE_DATA authn_alias_module =
{
STANDARD20_MODULE_STUFF,
NULL, /* dir config creater */
NULL, /* dir merger --- default is to override */
create_authn_alias_svr_config, /* server config */
NULL, /* merge server config */
authn_alias_cmds, /* command apr_table_t */
NULL /* register hooks */
};
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