1 /*- 2 * Copyright (c) 2006 nCircle Network Security, Inc. 3 * All rights reserved. 4 * 5 * This software was developed by Robert N. M. Watson for the TrustedBSD 6 * Project under contract to nCircle Network Security, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY, 21 * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 23 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 25 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 26 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 /* 33 * Test that privilege is required to write to the system extended attribute 34 * namespace. 35 */ 36 37 #include <sys/types.h> 38 #include <sys/extattr.h> 39 40 #include <err.h> 41 #include <errno.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #include "main.h" 46 47 #define EA_NAMESPACE EXTATTR_NAMESPACE_SYSTEM 48 #define EA_NAME "test" 49 #define EA_DATA "test" 50 #define EA_SIZE strlen(EA_DATA) 51 52 void 53 priv_vfs_extattr_system(void) 54 { 55 char fpath[1024]; 56 int error; 57 58 assert_root(); 59 60 /* 61 * Set file perms so that discretionary access control would grant 62 * write rights on non-system EAs on the file. 63 */ 64 setup_file(fpath, UID_ROOT, GID_WHEEL, 0666); 65 66 /* 67 * Try with privilege. 68 */ 69 if (extattr_set_file(fpath, EA_NAMESPACE, EA_NAME, EA_DATA, EA_SIZE) 70 < 0) { 71 warn("extattr_set_file(SYSTEM, %s, %s, %d) as root", 72 EA_NAME, EA_DATA, EA_SIZE); 73 goto out; 74 } 75 76 set_euid(UID_OTHER); 77 78 /* 79 * Try without privilege. 80 */ 81 error = extattr_set_file(fpath, EA_NAMESPACE, EA_NAME, EA_DATA, 82 EA_SIZE); 83 if (error == 0) { 84 warn("extattr_set_file(SYSTEM, %s, %s, %d) succeeded as !root", 85 EA_NAME, EA_DATA, EA_SIZE); 86 goto out; 87 } 88 if (errno != EPERM) { 89 warn("extattr_set_file(SYSTEM, %s, %s, %d) wrong errno %d " 90 "as !root", EA_NAME, EA_DATA, EA_SIZE, errno); 91 goto out; 92 } 93 out: 94 seteuid(UID_ROOT); 95 (void)unlink(fpath); 96 } 97