source: openpam/trunk/lib/openpam_set_option.c @ 227

Last change on this file since 227 was 227, checked in by Dag-Erling Smørgrav, 15 years ago

NOLIST doesn't actually do anything, and hasn't for quite a while.

File size: 3.4 KB
RevLine 
[74]1/*-
[221]2 * Copyright (c) 2002,2003 Networks Associates Technology, Inc.
[74]3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by ThinkSec AS and
[157]6 * Network Associates Laboratories, the Security Research Division of
7 * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
8 * ("CBOSS"), as part of the DARPA CHATS research program.
[74]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 *
[227]34 * $P4: //depot/projects/openpam/lib/openpam_set_option.c#9 $
[74]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
[200]64        ENTERS(option);
[74]65        if (pamh == NULL || pamh->current == NULL || option == NULL)
[187]66                RETURNC(PAM_SYSTEM_ERR);
[74]67        cur = pamh->current;
68        for (len = 0; option[len] != '\0'; ++len)
69                if (option[len] == '=')
70                        break;
71        for (i = 0; i < cur->optc; ++i) {
72                if (strncmp(cur->optv[i], option, len) == 0 &&
73                    (cur->optv[i][len] == '\0' || cur->optv[i][len] == '='))
74                        break;
75        }
[85]76        if (value == NULL) {
77                /* remove */
78                if (i == cur->optc)
[187]79                        RETURNC(PAM_SUCCESS);
[85]80                for (free(cur->optv[i]); i < cur->optc; ++i)
81                        cur->optv[i] = cur->optv[i + 1];
82                cur->optv[i] = NULL;
[187]83                RETURNC(PAM_SUCCESS);
[85]84        }
[74]85        if ((opt = malloc(len + strlen(value) + 2)) == NULL)
[187]86                RETURNC(PAM_BUF_ERR);
[74]87        sprintf(opt, "%.*s=%s", (int)len, option, value);
88        if (i == cur->optc) {
[85]89                /* add */
[74]90                optv = realloc(cur->optv, sizeof(char *) * (cur->optc + 2));
91                if (optv == NULL) {
92                        free(opt);
[187]93                        RETURNC(PAM_BUF_ERR);
[74]94                }
95                optv[i] = opt;
96                optv[i + 1] = NULL;
97                cur->optv = optv;
98                ++cur->optc;
[85]99        } else {
100                /* replace */
101                free(cur->optv[i]);
102                cur->optv[i] = opt;
[74]103        }
[187]104        RETURNC(PAM_SUCCESS);
[74]105}
106
107/*
108 * Error codes:
109 *
110 *      PAM_SYSTEM_ERR
111 *      PAM_BUF_ERR
112 */
113
114/**
115 * The =openpam_set_option function sets the specified option in the
116 * context of the currently executing service module.
117 */
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