1 /*- 2 * Copyright (c) 2006 nCircle Network Security, Inc. 3 * Copyright (c) 2007 Robert N. M. Watson 4 * All rights reserved. 5 * 6 * This software was developed by Robert N. M. Watson for the TrustedBSD 7 * Project under contract to nCircle Network Security, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY, 22 * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 24 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 25 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 26 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 27 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* 32 * Test privileges associated with setting file flags on files; whether or 33 * not it requires privilege depends on the flag, and some flags cannot be 34 * set in jail at all. 35 */ 36 37 #include <sys/types.h> 38 #include <sys/stat.h> 39 40 #include <err.h> 41 #include <errno.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 #include "main.h" 47 48 static char fpath[1024]; 49 static int fpath_initialized; 50 51 /* 52 * For chflags, we consider three dimmensions: process owner, file owner, and 53 * flag type. The calling framework handles variations in process owner; the 54 * rest are handled via multiple tests. One cleanup function is used. 55 */ 56 static u_long 57 getflags(char *fpathp) 58 { 59 struct stat sb; 60 61 if (stat(fpathp, &sb) < 0) 62 err(-1, "stat(%s)", fpathp); 63 64 return (sb.st_flags); 65 } 66 67 int 68 priv_vfs_chflags_froot_setup(int asroot, int injail, struct test *test) 69 { 70 71 setup_file("priv_vfs_chflags_froot_setup: fpath", fpath, UID_ROOT, 72 GID_WHEEL, 0600); 73 fpath_initialized = 1; 74 return (0); 75 } 76 77 int 78 priv_vfs_chflags_fowner_setup(int asroot, int injail, 79 struct test *test) 80 { 81 82 setup_file("priv_vfs_chflags_fowner_setup: fpath", fpath, UID_OWNER, 83 GID_OWNER, 0600); 84 fpath_initialized = 1; 85 return (0); 86 } 87 88 int 89 priv_vfs_chflags_fother_setup(int asroot, int injail, 90 struct test *test) 91 { 92 93 setup_file("priv_vfs_chflags_fowner_setup: fpath", fpath, UID_OTHER, 94 GID_OTHER, 0600); 95 fpath_initialized = 1; 96 return (0); 97 } 98 99 void 100 priv_vfs_chflags_froot_uflags(int asroot, int injail, 101 struct test *test) 102 { 103 u_long flags; 104 int error; 105 106 flags = getflags(fpath); 107 flags |= UF_NODUMP; 108 error = chflags(fpath, flags); 109 if (asroot && injail) 110 expect("priv_vfs_chflags_froot_uflags(asroot, injail)", 111 error, 0, 0); 112 if (asroot && !injail) 113 expect("priv_vfs_chflags_froot_uflags(asroot, !injail)", 114 error, 0, 0); 115 if (!asroot && injail) 116 expect("priv_vfs_chflags_froot_uflags(!asroot, injail)", 117 error, -1, EPERM); 118 if (!asroot && !injail) 119 expect("priv_vfs_chflags_froot_uflags(!asroot, !injail)", 120 error, -1, EPERM); 121 } 122 123 void 124 priv_vfs_chflags_fowner_uflags(int asroot, int injail, 125 struct test *test) 126 { 127 u_long flags; 128 int error; 129 130 flags = getflags(fpath); 131 flags |= UF_NODUMP; 132 error = chflags(fpath, flags); 133 if (asroot && injail) 134 expect("priv_vfs_chflags_fowner_uflags(asroot, injail)", 135 error, 0, 0); 136 if (asroot && !injail) 137 expect("priv_vfs_chflags_fowner_uflags(asroot, !injail)", 138 error, 0, 0); 139 if (!asroot && injail) 140 expect("priv_vfs_chflags_fowner_uflags(!asroot, injail)", 141 error, 0, 0); 142 if (!asroot && !injail) 143 expect("priv_vfs_chflags_fowner_uflags(!asroot, !injail)", 144 error, 0, 0); 145 } 146 147 void 148 priv_vfs_chflags_fother_uflags(int asroot, int injail, 149 struct test *test) 150 { 151 u_long flags; 152 int error; 153 154 flags = getflags(fpath); 155 flags |= UF_NODUMP; 156 error = chflags(fpath, flags); 157 if (asroot && injail) 158 expect("priv_vfs_chflags_fother_uflags(asroot, injail)", 159 error, 0, 0); 160 if (asroot && !injail) 161 expect("priv_vfs_chflags_fother_uflags(asroot, !injail)", 162 error, 0, 0); 163 if (!asroot && injail) 164 expect("priv_vfs_chflags_fother_uflags(!asroot, injail)", 165 error, -1, EPERM); 166 if (!asroot && !injail) 167 expect("priv_vfs_chflags_fother_uflags(!asroot, !injail)", 168 error, -1, EPERM); 169 } 170 171 void 172 priv_vfs_chflags_froot_sflags(int asroot, int injail, 173 struct test *test) 174 { 175 u_long flags; 176 int error; 177 178 flags = getflags(fpath); 179 flags |= SF_ARCHIVED; 180 error = chflags(fpath, flags); 181 if (asroot && injail) 182 expect("priv_vfs_chflags_froot_sflags(asroot, injail)", 183 error, -1, EPERM); 184 if (asroot && !injail) 185 expect("priv_vfs_chflags_froot_sflags(asroot, !injail)", 186 error, 0, 0); 187 if (!asroot && injail) 188 expect("priv_vfs_chflags_froot_sflags(!asroot, injail)", 189 error, -1, EPERM); 190 if (!asroot && !injail) 191 expect("priv_vfs_chflags_froot_sflags(!asroot, !injail)", 192 error, -1, EPERM); 193 } 194 195 void 196 priv_vfs_chflags_fowner_sflags(int asroot, int injail, 197 struct test *test) 198 { 199 u_long flags; 200 int error; 201 202 flags = getflags(fpath); 203 flags |= SF_ARCHIVED; 204 error = chflags(fpath, flags); 205 if (asroot && injail) 206 expect("priv_vfs_chflags_fowner_sflags(asroot, injail)", 207 error, -1, EPERM); 208 if (asroot && !injail) 209 expect("priv_vfs_chflags_fowner_sflags(asroot, !injail)", 210 error, 0, 0); 211 if (!asroot && injail) 212 expect("priv_vfs_chflags_fowner_sflags(!asroot, injail)", 213 error, -1, EPERM); 214 if (!asroot && !injail) 215 expect("priv_vfs_chflags_fowner_sflags(!asroot, !injail)", 216 error, -1, EPERM); 217 } 218 219 void 220 priv_vfs_chflags_fother_sflags(int asroot, int injail, 221 struct test *test) 222 { 223 u_long flags; 224 int error; 225 226 flags = getflags(fpath); 227 flags |= SF_ARCHIVED; 228 error = chflags(fpath, flags); 229 if (asroot && injail) 230 expect("priv_vfs_chflags_fother_sflags(asroot, injail)", 231 error, -1, EPERM); 232 if (asroot && !injail) 233 expect("priv_vfs_chflags_fother_sflags(asroot, !injail)", 234 error, 0, 0); 235 if (!asroot && injail) 236 expect("priv_vfs_chflags_fother_sflags(!asroot, injail)", 237 error, -1, EPERM); 238 if (!asroot && !injail) 239 expect("priv_vfs_chflags_fother_sflags(!asroot, !injail)", 240 error, -1, EPERM); 241 } 242 243 void 244 priv_vfs_chflags_cleanup(int asroot, int injail, struct test *test) 245 { 246 247 if (fpath_initialized) { 248 (void)chflags(fpath, 0); 249 (void)unlink(fpath); 250 fpath_initialized = 0; 251 } 252 } 253