source: server/common/oursrc/httpdmods/mod_auth_optional.c @ 390

Last change on this file since 390 was 390, checked in by andersk, 15 years ago
httpd module updates, including support for optional authentication.
  • Property svn:eol-style set to native
File size: 2.5 KB
Line 
1/* mod_auth_optional
2 * version 1.0, released 2007-09-01
3 * Anders Kaseorg <andersk@mit.edu>
4 *
5 * This module can pretend that authentication succeeded even if no
6 * authorization module is authoritative, instead of returning a
7 * Forbidden error.
8 */
9
10#include "ap_config.h"
11#include "httpd.h"
12#include "http_config.h"
13#include "http_request.h"
14
15typedef struct {
16    int optional;
17    char *default_user;
18} auth_optional_config_rec;
19
20static void *create_auth_optional_dir_config(apr_pool_t *p, char *d)
21{
22    auth_optional_config_rec *conf = apr_pcalloc(p, sizeof(*conf));
23    conf->optional = 0;
24    conf->default_user = NULL;
25    return conf;
26}
27
28static const command_rec auth_optional_cmds[] =
29{
30    AP_INIT_FLAG("AuthOptional", ap_set_flag_slot,
31                 (void *)APR_OFFSETOF(auth_optional_config_rec, optional),
32                 OR_AUTHCFG,
33                 "Make authentication succeed if no authorization module is authoritative"),
34    AP_INIT_TAKE1("AuthOptionalDefaultUser", ap_set_string_slot,
35                   (void*)APR_OFFSETOF(auth_optional_config_rec, default_user),
36                  OR_AUTHCFG,
37                  "Default username to use if no authorization module is authoritative"),
38    {NULL}
39};
40
41module AP_MODULE_DECLARE_DATA auth_optional_module;
42
43static int auth_optional_check_user_id(request_rec *r)
44{
45    auth_optional_config_rec *conf = ap_get_module_config(r->per_dir_config,
46                                                          &auth_optional_module);
47    if (!conf->optional)
48        return DECLINED;
49
50    r->user = conf->default_user;
51    return OK;
52}
53
54static int auth_optional_auth_checker(request_rec *r)
55{
56    auth_optional_config_rec *conf = ap_get_module_config(r->per_dir_config,
57                                                          &auth_optional_module);
58    if (!conf->optional || conf->default_user != NULL)
59        return DECLINED;
60
61    return OK;
62}
63
64static void register_hooks(apr_pool_t *p)
65{
66    /* Right before mod_authz_default. */
67    ap_hook_check_user_id(auth_optional_check_user_id, NULL, NULL, APR_HOOK_LAST - 1);
68    ap_hook_auth_checker(auth_optional_auth_checker, NULL, NULL, APR_HOOK_REALLY_FIRST);
69}
70
71module AP_MODULE_DECLARE_DATA auth_optional_module =
72{
73    STANDARD20_MODULE_STUFF,
74    create_auth_optional_dir_config, /* dir config creater */
75    NULL,                            /* dir merger --- default is to override */
76    NULL,                            /* server config */
77    NULL,                            /* merge server config */
78    auth_optional_cmds,              /* command apr_table_t */
79    register_hooks                   /* register hooks */
80};
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