1 /*-
2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3 * Copyright (c) 2004-2011 Dag-Erling Smørgrav
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by ThinkSec AS and
7 * Network Associates Laboratories, the Security Research Division of
8 * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
9 * ("CBOSS"), as part of the DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote
20 * products derived from this software without specific prior written
21 * permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #ifdef HAVE_CONFIG_H
37 # include "config.h"
38 #endif
39
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43
44 #include <security/pam_appl.h>
45
46 #include "openpam_impl.h"
47 #include "openpam_strlcpy.h"
48
49 #ifdef _SC_HOST_NAME_MAX
50 #define HOST_NAME_MAX sysconf(_SC_HOST_NAME_MAX)
51 #else
52 #define HOST_NAME_MAX 1024
53 #endif
54
55 /*
56 * XSSO 4.2.1
57 * XSSO 6 page 89
58 *
59 * Initiate a PAM transaction
60 */
61
62 int
pam_start(const char * service,const char * user,const struct pam_conv * pam_conv,pam_handle_t ** pamh)63 pam_start(const char *service,
64 const char *user,
65 const struct pam_conv *pam_conv,
66 pam_handle_t **pamh)
67 {
68 char hostname[HOST_NAME_MAX + 1];
69 struct pam_handle *ph;
70 int r;
71
72 ENTER();
73 if ((ph = calloc(1, sizeof *ph)) == NULL)
74 RETURNC(PAM_BUF_ERR);
75 if ((r = pam_set_item(ph, PAM_SERVICE, service)) != PAM_SUCCESS)
76 goto fail;
77 if (gethostname(hostname, sizeof hostname) != 0)
78 strlcpy(hostname, "localhost", sizeof hostname);
79 if ((r = pam_set_item(ph, PAM_HOST, hostname)) != PAM_SUCCESS)
80 goto fail;
81 if ((r = pam_set_item(ph, PAM_USER, user)) != PAM_SUCCESS)
82 goto fail;
83 if ((r = pam_set_item(ph, PAM_CONV, pam_conv)) != PAM_SUCCESS)
84 goto fail;
85 if ((r = openpam_configure(ph, service)) != PAM_SUCCESS)
86 goto fail;
87 *pamh = ph;
88 openpam_log(PAM_LOG_DEBUG, "pam_start(\"%s\") succeeded", service);
89 RETURNC(PAM_SUCCESS);
90 fail:
91 pam_end(ph, r);
92 RETURNC(r);
93 }
94
95 /*
96 * Error codes:
97 *
98 * =openpam_configure
99 * =pam_set_item
100 * !PAM_SYMBOL_ERR
101 * PAM_BUF_ERR
102 */
103
104 /**
105 * The =pam_start function creates and initializes a PAM context.
106 *
107 * The =service argument specifies the name of the policy to apply, and is
108 * stored in the =PAM_SERVICE item in the created context.
109 *
110 * The =user argument specifies the name of the target user - the user the
111 * created context will serve to authenticate.
112 * It is stored in the =PAM_USER item in the created context.
113 *
114 * The =pam_conv argument points to a =struct pam_conv describing the
115 * conversation function to use; see =pam_conv for details.
116 *
117 * >pam_get_item
118 * >pam_set_item
119 * >pam_end
120 */
121