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
|
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "base.h"
#include "log.h"
#include "buffer.h"
#include "plugin.h"
typedef struct {
array *access_deny;
} plugin_config;
typedef struct {
PLUGIN_DATA;
plugin_config **config_storage;
plugin_config conf;
} plugin_data;
INIT_FUNC(mod_access_init) {
plugin_data *p;
p = calloc(1, sizeof(*p));
return p;
}
FREE_FUNC(mod_access_free) {
plugin_data *p = p_d;
UNUSED(srv);
if (!p) return HANDLER_GO_ON;
if (p->config_storage) {
size_t i;
for (i = 0; i < srv->config_context->used; i++) {
plugin_config *s = p->config_storage[i];
array_free(s->access_deny);
free(s);
}
free(p->config_storage);
}
free(p);
return HANDLER_GO_ON;
}
SETDEFAULTS_FUNC(mod_access_set_defaults) {
plugin_data *p = p_d;
size_t i = 0;
config_values_t cv[] = {
{ "url.access-deny", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION },
{ NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
};
p->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config *));
for (i = 0; i < srv->config_context->used; i++) {
plugin_config *s;
s = calloc(1, sizeof(plugin_config));
s->access_deny = array_init();
cv[0].destination = s->access_deny;
p->config_storage[i] = s;
if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv)) {
return HANDLER_ERROR;
}
}
return HANDLER_GO_ON;
}
#define PATCH(x) \
p->conf.x = s->x;
static int mod_access_patch_connection(server *srv, connection *con, plugin_data *p) {
size_t i, j;
plugin_config *s = p->config_storage[0];
PATCH(access_deny);
/* skip the first, the global context */
for (i = 1; i < srv->config_context->used; i++) {
data_config *dc = (data_config *)srv->config_context->data[i];
s = p->config_storage[i];
/* condition didn't match */
if (!config_check_cond(srv, con, dc)) continue;
/* merge config */
for (j = 0; j < dc->value->used; j++) {
data_unset *du = dc->value->data[j];
if (buffer_is_equal_string(du->key, CONST_STR_LEN("url.access-deny"))) {
PATCH(access_deny);
}
}
}
return 0;
}
#undef PATCH
/**
* URI handler
*
* we will get called twice:
* - after the clean up of the URL and
* - after the pathinfo checks are done
*
* this handles the issue of trailing slashes
*/
URIHANDLER_FUNC(mod_access_uri_handler) {
plugin_data *p = p_d;
int s_len;
size_t k;
if (con->uri.path->used == 0) return HANDLER_GO_ON;
mod_access_patch_connection(srv, con, p);
s_len = con->uri.path->used - 1;
if (con->conf.log_request_handling) {
log_error_write(srv, __FILE__, __LINE__, "s",
"-- mod_access_uri_handler called");
}
for (k = 0; k < p->conf.access_deny->used; k++) {
data_string *ds = (data_string *)p->conf.access_deny->data[k];
int ct_len = ds->value->used - 1;
int denied = 0;
if (ct_len > s_len) continue;
if (ds->value->used == 0) continue;
/* if we have a case-insensitive FS we have to lower-case the URI here too */
if (con->conf.force_lowercase_filenames) {
if (0 == strncasecmp(con->uri.path->ptr + s_len - ct_len, ds->value->ptr, ct_len)) {
denied = 1;
}
} else {
if (0 == strncmp(con->uri.path->ptr + s_len - ct_len, ds->value->ptr, ct_len)) {
denied = 1;
}
}
if (denied) {
con->http_status = 403;
if (con->conf.log_request_handling) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"url denied as we match:", ds->value);
}
return HANDLER_FINISHED;
}
}
/* not found */
return HANDLER_GO_ON;
}
int mod_access_plugin_init(plugin *p) {
p->version = LIGHTTPD_VERSION_ID;
p->name = buffer_init_string("access");
p->init = mod_access_init;
p->set_defaults = mod_access_set_defaults;
p->handle_uri_clean = mod_access_uri_handler;
p->handle_subrequest_start = mod_access_uri_handler;
p->cleanup = mod_access_free;
p->data = NULL;
return 0;
}
|
