191094Sdes/*-
2115619Sdes * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
3348980Sdes * Copyright (c) 2004-2019 Dag-Erling Sm��rgrav
491094Sdes * All rights reserved.
591094Sdes *
691094Sdes * This software was developed for the FreeBSD Project by ThinkSec AS and
799158Sdes * Network Associates Laboratories, the Security Research Division of
899158Sdes * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
999158Sdes * ("CBOSS"), as part of the DARPA CHATS research program.
1091094Sdes *
1191094Sdes * Redistribution and use in source and binary forms, with or without
1291094Sdes * modification, are permitted provided that the following conditions
1391094Sdes * are met:
1491094Sdes * 1. Redistributions of source code must retain the above copyright
1591094Sdes *    notice, this list of conditions and the following disclaimer.
1691094Sdes * 2. Redistributions in binary form must reproduce the above copyright
1791094Sdes *    notice, this list of conditions and the following disclaimer in the
1891094Sdes *    documentation and/or other materials provided with the distribution.
1991094Sdes * 3. The name of the author may not be used to endorse or promote
2091094Sdes *    products derived from this software without specific prior written
2191094Sdes *    permission.
2291094Sdes *
2391094Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
2491094Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2591094Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2691094Sdes * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
2791094Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2891094Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2991094Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3091094Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
3191094Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3291094Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3391094Sdes * SUCH DAMAGE.
3491094Sdes *
35348980Sdes * $OpenPAM: pam_getenv.c 944 2019-02-22 09:49:12Z des $
3691094Sdes */
3791094Sdes
38228690Sdes#ifdef HAVE_CONFIG_H
39228690Sdes# include "config.h"
40228690Sdes#endif
41228690Sdes
42348980Sdes#include <errno.h>
4391094Sdes#include <stdlib.h>
4491094Sdes#include <string.h>
4591094Sdes
4691094Sdes#include <security/pam_appl.h>
4791094Sdes
4891094Sdes#include "openpam_impl.h"
4991094Sdes
5091094Sdes/*
5191094Sdes * XSSO 4.2.1
5291094Sdes * XSSO 6 page 44
5391094Sdes *
5491094Sdes * Retrieve the value of a PAM environment variable
5591094Sdes */
5691094Sdes
57114536Sdesconst char *
5891094Sdespam_getenv(pam_handle_t *pamh,
5991094Sdes	const char *name)
6091094Sdes{
61348980Sdes	size_t len;
6291094Sdes	int i;
6391094Sdes
64110558Sdes	ENTERS(name);
65348980Sdes	for (len = 0; name[len] != '\0'; ++len) {
66348980Sdes		if (name[len] == '=') {
67348980Sdes			errno = EINVAL;
68348980Sdes			RETURNS(NULL);
69110558Sdes		}
70110558Sdes	}
71348980Sdes	if ((i = openpam_findenv(pamh, name, len)) < 0)
72348980Sdes		RETURNS(NULL);
73348980Sdes	/* assert(pamh->env[i][len] == '='); */
74348980Sdes	RETURNS(pamh->env[i] + len + 1);
7591094Sdes}
7691100Sdes
7791100Sdes/**
7891100Sdes * The =pam_getenv function returns the value of an environment variable.
7991100Sdes * Its semantics are similar to those of =getenv, but it accesses the PAM
8091100Sdes * context's environment list instead of the application's.
8191100Sdes *
8291100Sdes * >pam_getenvlist
8391100Sdes * >pam_putenv
8491100Sdes * >pam_setenv
8591100Sdes */
86