2 * Copyright (c) 2003 Networks Associates Technology, Inc.
5 * Portions of this software were developed for the FreeBSD Project by
6 * ThinkSec AS and NAI Labs, the Security Research Division of Network
7 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
8 * ("CBOSS"), as part of the DARPA CHATS research program.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote
19 * products derived from this software without specific prior written
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $FreeBSD: src/lib/libpam/modules/pam_guest/pam_guest.c,v 1.1 2003/05/31 16:52:58 des Exp $
41 #include <security/pam_appl.h>
42 #include <security/pam_modules.h>
43 #include <security/openpam.h>
45 #define DEFAULT_GUESTS "guest"
48 lookup(const char *str
, const char *list
)
54 while (*list
!= '\0') {
57 if ((next
= strchr(list
, ',')) == NULL
)
58 next
= strchr(list
, '\0');
59 if (next
- list
== (ptrdiff_t)len
&&
60 strncmp(list
, str
, len
) == 0)
68 pam_sm_authenticate(pam_handle_t
*pamh
, int flags __unused
,
69 int argc __unused
, const char *argv
[] __unused
)
71 const char *authtok
, *guests
, *user
;
74 /* get target account */
75 if (pam_get_user(pamh
, &user
, NULL
) != PAM_SUCCESS
|| user
== NULL
)
76 return (PAM_AUTH_ERR
);
78 /* get list of guest logins */
79 if ((guests
= openpam_get_option(pamh
, "guests")) == NULL
)
80 guests
= DEFAULT_GUESTS
;
82 /* check if the target account is on the list */
83 is_guest
= lookup(user
, guests
);
86 if (!openpam_get_option(pamh
, "nopass")) {
87 err
= pam_get_authtok(pamh
, PAM_AUTHTOK
, &authtok
, NULL
);
88 if (err
!= PAM_SUCCESS
)
90 if (openpam_get_option(pamh
, "pass_is_user") &&
91 strcmp(user
, authtok
) != 0)
92 return (PAM_AUTH_ERR
);
93 if (openpam_get_option(pamh
, "pass_as_ruser"))
94 pam_set_item(pamh
, PAM_RUSER
, authtok
);
99 pam_setenv(pamh
, "GUEST", user
, 1);
100 return (PAM_SUCCESS
);
102 return (PAM_AUTH_ERR
);
106 pam_sm_setcred(pam_handle_t
* pamh __unused
, int flags __unused
,
107 int argc __unused
, const char *argv
[] __unused
)
110 return (PAM_SUCCESS
);
113 PAM_MODULE_ENTRY("pam_guest");