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
|
/*-
* Copyright (c) 2002 Networks Associates Technologies, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by ThinkSec AS and
* NAI Labs, the Security Research Division of Network Associates, Inc.
* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
* DARPA CHATS research program.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <err.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <unistd.h>
#include <security/pam_appl.h>
#include <security/openpam.h>
static pam_handle_t *pamh;
static struct pam_conv pamc = {
openpam_ttyconv,
NULL
};
static char *yp_domain;
static char *yp_host;
static void
usage(void)
{
fprintf(stderr, "usage: passwd [-ly] [-d domain] [-h host] [user]\n");
exit(1);
}
int
main(int argc, char *argv[])
{
char hostname[MAXHOSTNAMELEN];
struct passwd *pwd;
int o, pam_err;
uid_t uid;
while ((o = getopt(argc, argv, "d:h:loy")) != -1)
switch (o) {
case 'd':
yp_domain = optarg;
break;
case 'h':
yp_host = optarg;
break;
case 'l':
case 'o':
case 'y':
/* compatibility */
break;
default:
usage();
}
argc -= optind;
argv += optind;
uid = getuid();
switch (argc) {
case 0:
if ((pwd = getpwuid(uid)) == NULL)
errx(1, "who are you?");
break;
case 1:
if ((pwd = getpwnam(*argv)) == NULL)
errx(1, "%s: no such user", *argv);
break;
default:
usage();
}
if (uid != 0 && uid != pwd->pw_uid)
errx(1, "permission denied");
/* check where the user's from */
switch (pwd->pw_fields & _PWF_SOURCE) {
case _PWF_FILES:
fprintf(stderr, "Changing local password for %s\n",
pwd->pw_name);
break;
case _PWF_NIS:
fprintf(stderr, "Changing NIS password for %s\n",
pwd->pw_name);
break;
case _PWF_HESIOD:
errx(1, "can't change Hesiod password");
break;
default:
/* specieist! */
errx(1, "can't change little green men's passwords (0x%x)",
pwd->pw_fields);
}
#define pam_check(func) do { \
if (pam_err != PAM_SUCCESS) { \
if (pam_err == PAM_AUTH_ERR || pam_err == PAM_PERM_DENIED || \
pam_err == PAM_AUTHTOK_RECOVERY_ERR) \
warnx("sorry"); \
else \
warnx("%s(): %s", func, pam_strerror(pamh, pam_err)); \
goto end; \
} \
} while (0)
/* initialize PAM */
pam_err = pam_start("passwd", pwd->pw_name, &pamc, &pamh);
pam_check("pam_start");
pam_err = pam_set_item(pamh, PAM_TTY, ttyname(STDERR_FILENO));
pam_check("pam_set_item");
gethostname(hostname, sizeof hostname);
pam_err = pam_set_item(pamh, PAM_RHOST, hostname);
pam_check("pam_set_item");
pam_err = pam_set_item(pamh, PAM_RUSER, getlogin());
pam_check("pam_set_item");
/* set YP domain and host */
pam_err = pam_set_data(pamh, "yp_domain", yp_domain, NULL);
pam_check("pam_set_data");
pam_err = pam_set_data(pamh, "yp_server", yp_host, NULL);
pam_check("pam_set_data");
/* set new password */
pam_err = pam_chauthtok(pamh, 0);
pam_check("pam_chauthtok");
end:
pam_end(pamh, pam_err);
exit(pam_err == PAM_SUCCESS ? 0 : 1);
}
|
