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 * $OpenPAM: pam_start.c 938 2017-04-30 21:34:42Z des $
36 */
37
38 #ifdef HAVE_CONFIG_H
39 # include "config.h"
40 #endif
41
42 #include <stdlib.h>
43 #include <string.h>
44 #include <unistd.h>
45
46 #include <security/pam_appl.h>
47
48 #include "openpam_impl.h"
49 #include "openpam_strlcpy.h"
50
51 #ifdef _SC_HOST_NAME_MAX
52 #define HOST_NAME_MAX sysconf(_SC_HOST_NAME_MAX)
53 #else
54 #define HOST_NAME_MAX 1024
55 #endif
56
57 /*
58 * XSSO 4.2.1
59 * XSSO 6 page 89
60 *
61 * Initiate a PAM transaction
62 */
63
64 int
pam_start(const char * service,const char * user,const struct pam_conv * pam_conv,pam_handle_t ** pamh)65 pam_start(const char *service,
66 const char *user,
67 const struct pam_conv *pam_conv,
68 pam_handle_t **pamh)
69 {
70 char hostname[HOST_NAME_MAX + 1];
71 struct pam_handle *ph;
72 int r;
73
74 ENTER();
75 if ((ph = calloc(1, sizeof *ph)) == NULL)
76 RETURNC(PAM_BUF_ERR);
77 if ((r = pam_set_item(ph, PAM_SERVICE, service)) != PAM_SUCCESS)
78 goto fail;
79 if (gethostname(hostname, sizeof hostname) != 0)
80 strlcpy(hostname, "localhost", sizeof hostname);
81 if ((r = pam_set_item(ph, PAM_HOST, hostname)) != PAM_SUCCESS)
82 goto fail;
83 if ((r = pam_set_item(ph, PAM_USER, user)) != PAM_SUCCESS)
84 goto fail;
85 if ((r = pam_set_item(ph, PAM_CONV, pam_conv)) != PAM_SUCCESS)
86 goto fail;
87 if ((r = openpam_configure(ph, service)) != PAM_SUCCESS)
88 goto fail;
89 *pamh = ph;
90 openpam_log(PAM_LOG_DEBUG, "pam_start(\"%s\") succeeded", service);
91 RETURNC(PAM_SUCCESS);
92 fail:
93 pam_end(ph, r);
94 RETURNC(r);
95 }
96
97 /*
98 * Error codes:
99 *
100 * =openpam_configure
101 * =pam_set_item
102 * !PAM_SYMBOL_ERR
103 * PAM_BUF_ERR
104 */
105
106 /**
107 * The =pam_start function creates and initializes a PAM context.
108 *
109 * The =service argument specifies the name of the policy to apply, and is
110 * stored in the =PAM_SERVICE item in the created context.
111 *
112 * The =user argument specifies the name of the target user - the user the
113 * created context will serve to authenticate.
114 * It is stored in the =PAM_USER item in the created context.
115 *
116 * The =pam_conv argument points to a =struct pam_conv describing the
117 * conversation function to use; see =pam_conv for details.
118 *
119 * >pam_get_item
120 * >pam_set_item
121 * >pam_end
122 */
123