1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/* 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.
*/
/*
* Adapted to allow anonymous logins, just like with Anon-FTP, when
* one gives the magic user name 'anonymous' and ones email address
* as the password.
*
* Just add the following tokes to your <directory> setup:
*
* Anonymous magic-userid [magic-userid]...
*
* Anonymous_MustGiveEmail [ on | off ] default = on
* Anonymous_LogEmail [ on | off ] default = on
* Anonymous_VerifyEmail [ on | off ] default = off
* Anonymous_NoUserId [ on | off ] default = off
*
* The magic user id is something like 'anonymous', it is NOT case sensitive.
*
* The MustGiveEmail flag can be used to force users to enter something
* in the password field (like an email address). Default is on.
*
* Furthermore the 'NoUserID' flag can be set to allow completely empty
* usernames in as well; this can be is convenient as a single return
* in broken GUIs like W95 is often given by the user. The Default is off.
*
* Dirk.vanGulik@jrc.it; http://ewse.ceo.org; http://me-www.jrc.it/~dirkx
*
*/
#include "apr_strings.h"
#define APR_WANT_STRFUNC
#include "apr_want.h"
#include "ap_provider.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h"
#include "http_request.h"
#include "http_protocol.h"
#include "mod_auth.h"
typedef struct anon_auth_user {
char *user;
struct anon_auth_user *next;
} anon_auth_user;
typedef struct {
anon_auth_user *users;
int nouserid;
int logemail;
int verifyemail;
int mustemail;
int anyuserid;
} authn_anon_config_rec;
static void *create_authn_anon_dir_config(apr_pool_t *p, char *d)
{
authn_anon_config_rec *conf = apr_palloc(p, sizeof(*conf));
/* just to illustrate the defaults really. */
conf->users = NULL;
conf->nouserid = 0;
conf->anyuserid = 0;
conf->logemail = 1;
conf->verifyemail = 0;
conf->mustemail = 1;
return conf;
}
static const char *anon_set_string_slots(cmd_parms *cmd,
void *my_config, const char *arg)
{
authn_anon_config_rec *conf = my_config;
anon_auth_user *first;
if (!*arg) {
return "Anonymous string cannot be empty, use Anonymous_NoUserId";
}
/* squeeze in a record */
if (!conf->anyuserid) {
if (!strcmp(arg, "*")) {
conf->anyuserid = 1;
}
else {
first = conf->users;
conf->users = apr_palloc(cmd->pool, sizeof(*conf->users));
conf->users->user = apr_pstrdup(cmd->pool, arg);
conf->users->next = first;
}
}
return NULL;
}
static const command_rec authn_anon_cmds[] =
{
AP_INIT_ITERATE("Anonymous", anon_set_string_slots, NULL, OR_AUTHCFG,
"a space-separated list of user IDs"),
AP_INIT_FLAG("Anonymous_MustGiveEmail", ap_set_flag_slot,
(void *)APR_OFFSETOF(authn_anon_config_rec, mustemail),
OR_AUTHCFG, "Limited to 'on' or 'off'"),
AP_INIT_FLAG("Anonymous_NoUserId", ap_set_flag_slot,
(void *)APR_OFFSETOF(authn_anon_config_rec, nouserid),
OR_AUTHCFG, "Limited to 'on' or 'off'"),
AP_INIT_FLAG("Anonymous_VerifyEmail", ap_set_flag_slot,
(void *)APR_OFFSETOF(authn_anon_config_rec, verifyemail),
OR_AUTHCFG, "Limited to 'on' or 'off'"),
AP_INIT_FLAG("Anonymous_LogEmail", ap_set_flag_slot,
(void *)APR_OFFSETOF(authn_anon_config_rec, logemail),
OR_AUTHCFG, "Limited to 'on' or 'off'"),
{NULL}
};
module AP_MODULE_DECLARE_DATA authn_anon_module;
static authn_status check_anonymous(request_rec *r, const char *user,
const char *sent_pw)
{
authn_anon_config_rec *conf = ap_get_module_config(r->per_dir_config,
&authn_anon_module);
authn_status res = AUTH_USER_NOT_FOUND;
/* Ignore if we are not configured */
if (!conf->users && !conf->anyuserid) {
return AUTH_USER_NOT_FOUND;
}
/* Do we allow an empty userID and/or is it the magic one
*/
if (!*user) {
if (conf->nouserid) {
res = AUTH_USER_FOUND;
}
}
else if (conf->anyuserid) {
res = AUTH_USER_FOUND;
}
else {
anon_auth_user *p = conf->users;
while (p) {
if (!strcasecmp(user, p->user)) {
res = AUTH_USER_FOUND;
break;
}
p = p->next;
}
}
/* Now if the supplied user-ID was ok, grant access if:
* (a) no passwd was sent and no password and no verification
* were configured.
* (b) password was sent and no verification was configured
* (c) verification was configured and the password (sent or not)
* looks like an email address
*/
if ( (res == AUTH_USER_FOUND)
&& (!conf->mustemail || *sent_pw)
&& ( !conf->verifyemail
|| (ap_strchr_c(sent_pw, '@') && ap_strchr_c(sent_pw, '.'))))
{
if (conf->logemail && ap_is_initial_req(r)) {
ap_log_rerror(APLOG_MARK, APLOG_INFO, APR_SUCCESS, r,
"Anonymous: Passwd <%s> Accepted",
sent_pw ? sent_pw : "\'none\'");
}
return AUTH_GRANTED;
}
return (res == AUTH_USER_NOT_FOUND ? res : AUTH_DENIED);
}
static const authn_provider authn_anon_provider =
{
&check_anonymous,
NULL
};
static void register_hooks(apr_pool_t *p)
{
ap_register_auth_provider(p, AUTHN_PROVIDER_GROUP, "anon",
AUTHN_PROVIDER_VERSION,
&authn_anon_provider, AP_AUTH_INTERNAL_PER_CONF);
}
AP_DECLARE_MODULE(authn_anon) =
{
STANDARD20_MODULE_STUFF,
create_authn_anon_dir_config, /* dir config creater */
NULL, /* dir merger ensure strictness */
NULL, /* server config */
NULL, /* merge server config */
authn_anon_cmds, /* command apr_table_t */
register_hooks /* register hooks */
};
|
