source: openpam/trunk/t/t_pam_conv.c @ 935

Last change on this file since 935 was 935, checked in by Dag-Erling Smørgrav, 4 years ago

Bump copyright year.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 4.2 KB
Line 
1/*-
2 * Copyright (c) 2015-2017 Dag-Erling Smørgrav
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 * 3. The name of the author may not be used to endorse or promote
14 *    products derived from this software without specific prior written
15 *    permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $Id: t_pam_conv.c 935 2017-04-26 21:04:10Z des $
30 */
31
32#ifdef HAVE_CONFIG_H
33# include "config.h"
34#endif
35
36#include <err.h>
37#include <errno.h>
38#include <stdint.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42
43#include <cryb/test.h>
44
45#include <security/pam_appl.h>
46#include <security/openpam.h>
47
48#include "openpam_impl.h"
49#include "openpam_asprintf.h"
50
51#include "t_pam_conv.h"
52
53/*
54 * Conversation function
55 *
56 * The appdata argument points to a struct t_pam_conv_script which
57 * contains both the expected messages and the desired responses.  If
58 * script.responses is NULL, t_pam_conv() will return PAM_CONV_ERR.  If an
59 * error occurs (incorrect number of messages, messages don't match script
60 * etc.), script.comment will be set to point to a malloc()ed string
61 * describing the error.  Otherwise, t_pam_conv() will return to its
62 * caller a malloc()ed copy of script.responses.
63 */
64int
65t_pam_conv(int nm, const struct pam_message **msgs,
66    struct pam_response **respsp, void *ad)
67{
68        struct t_pam_conv_script *s = ad;
69        struct pam_response *resps;
70        int i;
71
72        /* check message count */
73        if (nm != s->nmsg) {
74                asprintf(&s->comment, "expected %d messages, got %d",
75                    s->nmsg, nm);
76                return (PAM_CONV_ERR);
77        }
78        if (nm <= 0 || nm > PAM_MAX_NUM_MSG) {
79                /* since the previous test passed, this is intentional! */
80                s->comment = NULL;
81                return (PAM_CONV_ERR);
82        }
83
84        /* check each message and provide the sed answer */
85        if ((resps = calloc(nm, sizeof *resps)) == NULL)
86                goto enomem;
87        for (i = 0; i < nm; ++i) {
88                if (msgs[i]->msg_style != s->msgs[i].msg_style) {
89                        asprintf(&s->comment,
90                            "message %d expected style %d got %d", i,
91                            s->msgs[i].msg_style, msgs[i]->msg_style);
92                        goto fail;
93                }
94                if (strcmp(msgs[i]->msg, s->msgs[i].msg) != 0) {
95                        asprintf(&s->comment,
96                            "message %d expected \"%s\" got \"%s\"", i,
97                            s->msgs[i].msg, msgs[i]->msg);
98                        goto fail;
99                }
100                switch (msgs[i]->msg_style) {
101                case PAM_PROMPT_ECHO_OFF:
102                        t_printv("[PAM_PROMPT_ECHO_OFF] %s\n", msgs[i]->msg);
103                        break;
104                case PAM_PROMPT_ECHO_ON:
105                        t_printv("[PAM_PROMPT_ECHO_ON] %s\n", msgs[i]->msg);
106                        break;
107                case PAM_ERROR_MSG:
108                        t_printv("[PAM_ERROR_MSG] %s\n", msgs[i]->msg);
109                        break;
110                case PAM_TEXT_INFO:
111                        t_printv("[PAM_TEXT_INFO] %s\n", msgs[i]->msg);
112                        break;
113                default:
114                        asprintf(&s->comment, "invalid message style %d",
115                            msgs[i]->msg_style);
116                        goto fail;
117                }
118                /* copy the response, if there is one */
119                if (s->resps[i].resp != NULL &&
120                    (resps[i].resp = strdup(s->resps[i].resp)) == NULL)
121                        goto enomem;
122                resps[i].resp_retcode = s->resps[i].resp_retcode;
123        }
124        s->comment = NULL;
125        *respsp = resps;
126        return (PAM_SUCCESS);
127enomem:
128        asprintf(&s->comment, "%s", strerror(ENOMEM));
129fail:
130        for (i = 0; i < nm; ++i)
131                free(resps[i].resp);
132        free(resps);
133        return (PAM_CONV_ERR);
134}
Note: See TracBrowser for help on using the repository browser.