2 * Copyright 1998 Juniper Networks, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/lib/libpam/modules/pam_skey/pam_skey.c,v 1.2.6.2 2003/02/10 12:15:30 des Exp $
29 #include <syslog.h> /* XXX */
36 #include <security/pam_appl.h>
37 #include <security/pam_modules.h>
38 #include <security/pam_mod_misc.h>
41 PAM_OPT_AUTH_AS_SELF = PAM_OPT_STD_MAX,
42 PAM_OPT_NO_FAKE_PROMPTS
45 static struct opttab other_options[] = {
46 { "auth_as_self", PAM_OPT_AUTH_AS_SELF },
47 { "no_fake_prompts", PAM_OPT_NO_FAKE_PROMPTS },
52 pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc,
62 struct options options;
65 pam_std_option(&options, other_options, argc, argv);
67 * It doesn't make sense to use a password that has already been
68 * typed in, since we haven't presented the challenge to the user
71 pam_clear_option(&options, PAM_OPT_USE_FIRST_PASS);
72 pam_clear_option(&options, PAM_OPT_TRY_FIRST_PASS);
73 if ((retval = pam_get_user(pamh, &user, NULL)) != PAM_SUCCESS)
75 if (skeyinfo(&skey, user, challenge) != 0)
77 snprintf(prompt, sizeof prompt, "%s\nPassword: ", challenge);
78 if ((retval = pam_get_pass(pamh, &response, prompt, &options)) !=
81 if (response[0] == '\0' &&
82 !pam_test_option(&options, PAM_OPT_ECHO_PASS, NULL)) {
83 pam_set_option(&options, PAM_OPT_ECHO_PASS);
84 snprintf(prompt, sizeof prompt,
85 "%s\nPassword [echo on]: ", challenge);
86 retval = pam_get_pass(pamh, &response, prompt, &options);
87 pam_clear_option(&options, PAM_OPT_ECHO_PASS);
88 if (retval != PAM_SUCCESS)
92 * Skeyinfo closed the database file, so we have to call skeylookup
95 if ((e = skeylookup(&skey, user)) != 0) {
97 syslog(LOG_ERR, "Error opening S/Key database");
98 return PAM_SERVICE_ERR;
102 /* We have to copy the response, because skeyverify mucks with it. */
103 snprintf(resp_buf, sizeof resp_buf, "%s", response);
105 * Skeyverify is supposed to return -1 only if an error occurs.
106 * But it returns -1 even if the response string isn't in the form
107 * it expects. Thus we can't log an error and can only check for
108 * success or lack thereof.
110 return skeyverify(&skey, resp_buf) == 0 ? PAM_SUCCESS : PAM_AUTH_ERR;
114 pam_sm_setcred(pam_handle_t *pamh, int flags, int argc, const char **argv)
119 PAM_MODULE_ENTRY("pam_skey");