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