source: openpam/trunk/lib/openpam_set_option.c @ 74

Last change on this file since 74 was 74, checked in by Dag-Erling Smørgrav, 18 years ago

Add openpam_get_option() and openpam_set_option().

Sponsored by: DARPA, NAI Labs

File size: 3.1 KB
Line 
1/*-
2 * Copyright (c) 2002 Networks Associates Technologies, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by ThinkSec AS and
6 * NAI Labs, the Security Research Division of Network Associates, Inc.
7 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
8 * DARPA CHATS research program.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
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
20 *    permission.
21 *
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
32 * SUCH DAMAGE.
33 *
34 * $Id$
35 */
36
37#include <sys/param.h>
38
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42
43#include <security/pam_appl.h>
44#include <security/openpam.h>
45
46#include "openpam_impl.h"
47
48/*
49 * OpenPAM extension
50 *
51 * Sets the value of a module option
52 */
53
54int
55openpam_set_option(pam_handle_t *pamh,
56        const char *option,
57        const char *value)
58{
59        pam_chain_t *cur;
60        char *opt, **optv;
61        size_t len;
62        int i;
63
64        if (pamh == NULL || pamh->current == NULL || option == NULL)
65                return (PAM_SYSTEM_ERR);
66        cur = pamh->current;
67        for (len = 0; option[len] != '\0'; ++len)
68                if (option[len] == '=')
69                        break;
70        for (i = 0; i < cur->optc; ++i) {
71                if (strncmp(cur->optv[i], option, len) == 0 &&
72                    (cur->optv[i][len] == '\0' || cur->optv[i][len] == '='))
73                        break;
74        }
75        if ((opt = malloc(len + strlen(value) + 2)) == NULL)
76                return (PAM_BUF_ERR);
77        sprintf(opt, "%.*s=%s", (int)len, option, value);
78        if (i == cur->optc) {
79                optv = realloc(cur->optv, sizeof(char *) * (cur->optc + 2));
80                if (optv == NULL) {
81                        free(opt);
82                        return (PAM_BUF_ERR);
83                }
84                optv[i] = opt;
85                optv[i + 1] = NULL;
86                cur->optv = optv;
87                ++cur->optc;
88        }
89        return (PAM_SUCCESS);
90}
91
92/*
93 * NOLIST
94 *
95 * Error codes:
96 *
97 *      PAM_SYSTEM_ERR
98 *      PAM_BUF_ERR
99 */
100
101/**
102 * The =openpam_set_option function sets the specified option in the
103 * context of the currently executing service module.
104 */
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