modules/aaa/mod_authz_user.c

   1 /* Licensed to the Apache Software Foundation (ASF) under one or more
   2  * contributor license agreements.  See the NOTICE file distributed with
   3  * this work for additional information regarding copyright ownership.
   4  * The ASF licenses this file to You under the Apache License, Version 2.0
   5  * (the "License"); you may not use this file except in compliance with
   6  * the License.  You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "apr_strings.h"
  18
  19 #include "ap_config.h"
  20 #include "ap_provider.h"
  21 #include "httpd.h"
  22 #include "http_config.h"
  23 #include "http_core.h"
  24 #include "http_log.h"
  25 #include "http_protocol.h"
  26 #include "http_request.h"
  27
  28 #include "mod_auth.h"
  29
  30 typedef struct {
  31         int dummy;  /* just here to stop compiler warnings for now. */
  32 } authz_user_config_rec;
  33
  34 static void *create_authz_user_dir_config(apr_pool_t *p, char *d)
  35 {
  36     authz_user_config_rec *conf = apr_palloc(p, sizeof(*conf));
  37
  38     return conf;
  39 }
  40
  41 static const command_rec authz_user_cmds[] =
  42 {
  43     {NULL}
  44 };
  45
  46 module AP_MODULE_DECLARE_DATA authz_user_module;
  47
  48 static authz_status user_check_authorization(request_rec *r,
  49                                              const char *require_args)
  50 {
  51     const char *t, *w;
  52
  53     if (!r->user) {
  54         ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
  55             "access to %s failed, reason: no authenticated user", r->uri);
  56         return AUTHZ_DENIED;
  57     }
  58
  59     t = require_args;
  60     while ((w = ap_getword_conf(r->pool, &t)) && w[0]) {
  61         if (!strcmp(r->user, w)) {
  62             return AUTHZ_GRANTED;
  63         }
  64     }
  65
  66     ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
  67                   "access to %s failed, reason: user '%s' does not meet "
  68                   "'require'ments for user to be allowed access",
  69                   r->uri, r->user);
  70
  71     return AUTHZ_DENIED;
  72 }
  73
  74 static authz_status validuser_check_authorization(request_rec *r, const char *require_line)
  75 {
  76     if (!r->user) {
  77         ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
  78             "access to %s failed, reason: no authenticated user", r->uri);
  79         return AUTHZ_DENIED;
  80     }
  81
  82     return AUTHZ_GRANTED;
  83 }
  84
  85 static const authz_provider authz_user_provider =
  86 {
  87     &user_check_authorization,
  88 };
  89 static const authz_provider authz_validuser_provider =
  90 {
  91     &validuser_check_authorization,
  92 };
  93
  94 static void register_hooks(apr_pool_t *p)
  95 {
  96     ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "user",
  97                               AUTHZ_PROVIDER_VERSION,
  98                               &authz_user_provider, AP_AUTH_INTERNAL_PER_CONF);
  99     ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "valid-user",
 100                               AUTHZ_PROVIDER_VERSION,
 101                               &authz_validuser_provider,
 102                               AP_AUTH_INTERNAL_PER_CONF);
 103 }
 104
 105 module AP_MODULE_DECLARE_DATA authz_user_module =
 106 {
 107     STANDARD20_MODULE_STUFF,
 108     create_authz_user_dir_config, /* dir config creater */
 109     NULL,                         /* dir merger --- default is to override */
 110     NULL,                         /* server config */
 111     NULL,                         /* merge server config */
 112     authz_user_cmds,              /* command apr_table_t */
 113     register_hooks                /* register hooks */
 114 };