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 36 #ifdef HAVE_CONFIG_H 37 # include "config.h" 38 #endif 39 40 #include <errno.h> 41 #include <stdlib.h> 42 #include <string.h> 43 44 #include <security/pam_appl.h> 45 46 #include "openpam_impl.h" 47 48 /* 49 * XSSO 4.2.1 50 * XSSO 6 page 44 51 * 52 * Retrieve the value of a PAM environment variable 53 */ 54 55 const char * 56 pam_getenv(pam_handle_t *pamh, 57 const char *name) 58 { 59 size_t len; 60 int i; 61 62 ENTERS(name); 63 for (len = 0; name[len] != '\0'; ++len) { 64 if (name[len] == '=') { 65 errno = EINVAL; 66 RETURNS(NULL); 67 } 68 } 69 if ((i = openpam_findenv(pamh, name, len)) < 0) 70 RETURNS(NULL); 71 /* assert(pamh->env[i][len] == '='); */ 72 RETURNS(pamh->env[i] + len + 1); 73 } 74 75 /** 76 * The =pam_getenv function returns the value of an environment variable. 77 * Its semantics are similar to those of =getenv, but it accesses the PAM 78 * context's environment list instead of the application's. 79 * 80 * >pam_getenvlist 81 * >pam_putenv 82 * >pam_setenv 83 */ 84