123 lines
3.5 KiB
C
123 lines
3.5 KiB
C
/*-
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* Copyright (c) 2002-2003 Networks Associates Technology, Inc.
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* Copyright (c) 2004-2011 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by ThinkSec AS and
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* Network Associates Laboratories, the Security Research Division of
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* Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: openpam_set_option.c 532 2012-03-31 14:24:53Z des $
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <sys/param.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <security/pam_appl.h>
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#include "openpam_impl.h"
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/*
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* OpenPAM extension
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*
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* Sets the value of a module option
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*/
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int
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openpam_set_option(pam_handle_t *pamh,
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const char *option,
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const char *value)
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{
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pam_chain_t *cur;
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char *opt, **optv;
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size_t len;
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int i;
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ENTERS(option);
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if (pamh == NULL || pamh->current == NULL || option == NULL)
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RETURNC(PAM_SYSTEM_ERR);
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cur = pamh->current;
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for (len = 0; option[len] != '\0'; ++len)
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if (option[len] == '=')
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break;
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for (i = 0; i < cur->optc; ++i) {
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if (strncmp(cur->optv[i], option, len) == 0 &&
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(cur->optv[i][len] == '\0' || cur->optv[i][len] == '='))
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break;
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}
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if (value == NULL) {
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/* remove */
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if (i == cur->optc)
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RETURNC(PAM_SUCCESS);
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for (free(cur->optv[i]); i < cur->optc; ++i)
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cur->optv[i] = cur->optv[i + 1];
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cur->optv[i] = NULL;
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RETURNC(PAM_SUCCESS);
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}
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if (asprintf(&opt, "%.*s=%s", (int)len, option, value) < 0)
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RETURNC(PAM_BUF_ERR);
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if (i == cur->optc) {
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/* add */
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optv = realloc(cur->optv, sizeof(char *) * (cur->optc + 2));
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if (optv == NULL) {
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FREE(opt);
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RETURNC(PAM_BUF_ERR);
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}
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optv[i] = opt;
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optv[i + 1] = NULL;
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cur->optv = optv;
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++cur->optc;
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} else {
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/* replace */
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FREE(cur->optv[i]);
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cur->optv[i] = opt;
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}
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RETURNC(PAM_SUCCESS);
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}
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/*
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* Error codes:
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*
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* PAM_SYSTEM_ERR
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* PAM_BUF_ERR
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*/
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/**
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* The =openpam_set_option function sets the specified option in the
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* context of the currently executing service module.
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*
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* >openpam_get_option
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*/
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