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
|
/*
* uhttpd - Tiny single-threaded httpd
*
* Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define _GNU_SOURCE
#define _XOPEN_SOURCE 700
#include <strings.h>
#ifdef HAVE_SHADOW
#include <shadow.h>
#endif
#include "uhttpd.h"
static LIST_HEAD(auth_realms);
void uh_auth_add(const char *path, const char *user, const char *pass)
{
struct auth_realm *new = NULL;
struct passwd *pwd;
const char *new_pass = NULL;
char *dest_path, *dest_user, *dest_pass;
#ifdef HAVE_SHADOW
struct spwd *spwd;
#endif
/* given password refers to a passwd entry */
if ((strlen(pass) > 3) && !strncmp(pass, "$p$", 3)) {
#ifdef HAVE_SHADOW
/* try to resolve shadow entry */
spwd = getspnam(&pass[3]);
if (spwd)
new_pass = spwd->sp_pwdp;
#endif
if (!new_pass) {
pwd = getpwnam(&pass[3]);
if (pwd && pwd->pw_passwd && pwd->pw_passwd[0] &&
pwd->pw_passwd[0] != '!')
new_pass = pwd->pw_passwd;
}
} else {
new_pass = pass;
}
if (!new_pass || !new_pass[0])
return;
new = calloc_a(sizeof(*new),
&dest_path, strlen(path) + 1,
&dest_user, strlen(user) + 1,
&dest_pass, strlen(new_pass) + 1);
if (!new)
return;
new->path = strcpy(dest_path, path);
new->user = strcpy(dest_user, user);
new->pass = strcpy(dest_pass, new_pass);
list_add(&new->list, &auth_realms);
}
bool uh_auth_check(struct client *cl, const char *path, const char *auth,
char **uptr, char **pptr)
{
struct http_request *req = &cl->request;
struct auth_realm *realm;
bool user_match = false;
char *user = NULL;
char *pass = NULL;
int plen;
if (uptr)
*uptr = NULL;
if (pptr)
*pptr = NULL;
if (auth && !strncasecmp(auth, "Basic ", 6)) {
auth += 6;
uh_b64decode(uh_buf, sizeof(uh_buf), auth, strlen(auth));
pass = strchr(uh_buf, ':');
if (pass) {
user = uh_buf;
*pass++ = 0;
}
}
req->realm = NULL;
plen = strlen(path);
list_for_each_entry(realm, &auth_realms, list) {
int rlen = strlen(realm->path);
if (plen < rlen)
continue;
if (strncasecmp(path, realm->path, rlen) != 0)
continue;
req->realm = realm;
if (!user)
break;
if (strcmp(user, realm->user) != 0)
continue;
user_match = true;
break;
}
if (!req->realm)
return true;
if (user_match &&
(!strcmp(pass, realm->pass) ||
!strcmp(crypt(pass, realm->pass), realm->pass))) {
if (uptr)
*uptr = user;
if (pptr)
*pptr = pass;
return true;
}
uh_http_header(cl, 401, "Authorization Required");
ustream_printf(cl->us,
"WWW-Authenticate: Basic realm=\"%s\"\r\n"
"Content-Type: text/plain\r\n\r\n",
conf.realm);
uh_chunk_printf(cl, "Authorization Required\n");
uh_request_done(cl);
return false;
}
|
