The AuthnProviderAlias directive has been merged into mod_authn_core. ...

/* 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 */

};