1 /* $NetBSD: pam_getenv.c,v 1.4 2019/12/15 17:08:21 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 5 * Copyright (c) 2004-2019 Dag-Erling Smørgrav 6 * All rights reserved. 7 * 8 * This software was developed for the FreeBSD Project by ThinkSec AS and 9 * Network Associates Laboratories, the Security Research Division of 10 * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 11 * ("CBOSS"), as part of the DARPA CHATS research program. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. The name of the author may not be used to endorse or promote 22 * products derived from this software without specific prior written 23 * permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * $OpenPAM: pam_getenv.c 944 2019-02-22 09:49:12Z des $ 38 */ 39 40 #ifdef HAVE_CONFIG_H 41 # include "config.h" 42 #endif 43 44 #include <sys/cdefs.h> 45 __RCSID("$NetBSD: pam_getenv.c,v 1.4 2019/12/15 17:08:21 christos Exp $"); 46 47 #include <errno.h> 48 #include <stdlib.h> 49 #include <string.h> 50 51 #include <security/pam_appl.h> 52 53 #include "openpam_impl.h" 54 55 /* 56 * XSSO 4.2.1 57 * XSSO 6 page 44 58 * 59 * Retrieve the value of a PAM environment variable 60 */ 61 62 const char * 63 pam_getenv(pam_handle_t *pamh, 64 const char *name) 65 { 66 size_t len; 67 int i; 68 69 ENTERS(name); 70 for (len = 0; name[len] != '\0'; ++len) { 71 if (name[len] == '=') { 72 errno = EINVAL; 73 RETURNS(NULL); 74 } 75 } 76 if ((i = openpam_findenv(pamh, name, len)) < 0) 77 RETURNS(NULL); 78 /* assert(pamh->env[i][len] == '='); */ 79 RETURNS(pamh->env[i] + len + 1); 80 } 81 82 /** 83 * The =pam_getenv function returns the value of an environment variable. 84 * Its semantics are similar to those of =getenv, but it accesses the PAM 85 * context's environment list instead of the application's. 86 * 87 * >pam_getenvlist 88 * >pam_putenv 89 * >pam_setenv 90 */ 91