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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
|
/* $OpenBSD: table_passwd.c,v 1.7 2014/07/08 13:49:09 eric Exp $ */
/*
* Copyright (c) 2013 Gilles Chehade <gilles@poolp.org>
*
* Permission to use, copy, modify, and 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.
*/
#include <sys/types.h>
#include <err.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "smtpd-defines.h"
#include "smtpd-api.h"
#include "log.h"
static int table_passwd_update(void);
static int table_passwd_check(int, struct dict *, const char *);
static int table_passwd_lookup(int, struct dict *, const char *, char *, size_t);
static int table_passwd_fetch(int, struct dict *, char *, size_t);
static int parse_passwd_entry(struct passwd *, const char *);
static char *config;
static struct dict *passwd;
int
main(int argc, char **argv)
{
int ch;
log_init(1);
while ((ch = getopt(argc, argv, "")) != -1) {
switch (ch) {
default:
log_warnx("warn: table-passwd: bad option");
return (1);
/* NOTREACHED */
}
}
argc -= optind;
argv += optind;
if (argc != 1) {
log_warnx("warn: table-passwd: bogus argument(s)");
return (1);
}
config = argv[0];
if (table_passwd_update() == 0) {
log_warnx("warn: table-passwd: error parsing config file");
return (1);
}
table_api_on_update(table_passwd_update);
table_api_on_check(table_passwd_check);
table_api_on_lookup(table_passwd_lookup);
table_api_on_fetch(table_passwd_fetch);
table_api_dispatch();
return (0);
}
static int
table_passwd_update(void)
{
FILE *fp;
char *buf, *lbuf = NULL;
size_t len;
char *line;
struct passwd pw;
struct dict *npasswd;
/* Parse configuration */
fp = fopen(config, "r");
if (fp == NULL)
return (0);
npasswd = calloc(1, sizeof *passwd);
if (npasswd == NULL)
goto err;
dict_init(npasswd);
while ((buf = fgetln(fp, &len))) {
if (buf[len - 1] == '\n')
buf[len - 1] = '\0';
else {
/* EOF without EOL, copy and add the NUL */
if ((lbuf = malloc(len + 1)) == NULL)
err(1, NULL);
memcpy(lbuf, buf, len);
lbuf[len] = '\0';
buf = lbuf;
}
if (! parse_passwd_entry(&pw, buf)) {
log_warnx("warn: table-passwd: invalid entry");
goto err;
}
if ((line = strdup(buf)) == NULL)
err(1, NULL);
dict_set(npasswd, pw.pw_name, line);
}
free(lbuf);
fclose(fp);
/* swap passwd table and release old one*/
if (passwd)
while (dict_poproot(passwd, (void**)&buf))
free(buf);
passwd = npasswd;
return (1);
err:
if (fp)
fclose(fp);
free(lbuf);
/* release passwd table */
if (npasswd) {
while (dict_poproot(npasswd, (void**)&buf))
free(buf);
free(npasswd);
}
return (0);
}
static int
table_passwd_check(int service, struct dict *params, const char *key)
{
return (-1);
}
static int
table_passwd_lookup(int service, struct dict *params, const char *key, char *dst, size_t sz)
{
int r;
struct passwd pw;
char *line;
line = dict_get(passwd, key);
if (line == NULL)
return 0;
if (! parse_passwd_entry(&pw, line)) {
log_warnx("warn: table-passwd: invalid entry");
return -1;
}
r = 1;
switch (service) {
case K_CREDENTIALS:
if (snprintf(dst, sz, "%s:%s",
pw.pw_name, pw.pw_passwd) >= (ssize_t)sz) {
log_warnx("warn: table-passwd: result too large");
r = -1;
}
break;
case K_USERINFO:
if (snprintf(dst, sz, "%d:%d:%s",
pw.pw_uid, pw.pw_gid, pw.pw_dir)
>= (ssize_t)sz) {
log_warnx("warn: table-passwd: result too large");
r = -1;
}
break;
default:
log_warnx("warn: table-passwd: unknown service %d",
service);
r = -1;
}
return (r);
}
static int
table_passwd_fetch(int service, struct dict *params, char *dst, size_t sz)
{
return (-1);
}
static int
parse_passwd_entry(struct passwd *pw, const char *line)
{
const char *errstr;
char *p, *q;
char buf[LINE_MAX];
if (strlcpy(buf, line, sizeof buf) >= sizeof buf)
return 0;
p = buf;
/* username */
q = p;
if ((p = strchr(q, ':')) == NULL)
return 0;
*p++ = 0;
pw->pw_name = q;
/* password */
q = p;
if ((p = strchr(q, ':')) == NULL)
return 0;
*p++ = 0;
pw->pw_passwd = q;
/* uid */
q = p;
if ((p = strchr(q, ':')) == NULL)
return 0;
*p++ = 0;
pw->pw_uid = strtonum(q, 1, UID_MAX, &errstr);
if (errstr)
return 0;
/* gid */
q = p;
if ((p = strchr(q, ':')) == NULL)
return 0;
*p++ = 0;
pw->pw_gid = strtonum(q, 1, GID_MAX, &errstr);
if (errstr)
return 0;
/* gecos */
q = p;
if ((p = strchr(q, ':')) == NULL)
return 0;
*p++ = 0;
pw->pw_gecos = q;
/* home */
q = p;
if ((p = strchr(q, ':')) == NULL)
return 0;
*p++ = 0;
pw->pw_dir = q;
/* shell */
q = p;
if (strchr(q, ':') != NULL)
return 0;
pw->pw_shell = q;
return 1;
}
|