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 * Two privileges exist for writing sysctls -- one for sysctls writable only 33 * outside of jail (PRIV_SYSCTL_WRITE) and one for those also writable inside 34 * jail (PRIV_SYSCTL_WRITEJAIL). 35 * 36 * Test the prior by attempting to write to kern.domainname, and the latter 37 * by attempting to write to kern.hostname. 38 */ 39 40 #include <sys/types.h> 41 #include <sys/sysctl.h> 42 43 #include <err.h> 44 #include <errno.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #include "main.h" 49 50 #define KERN_HOSTNAME_STRING "kern.hostname" 51 #define KERN_DOMAINNAME_STRING "kern.domainname" 52 53 static char stored_hostname[1024]; 54 static char stored_domainname[1024]; 55 56 int 57 priv_sysctl_write_setup(int asroot, int injail, struct test *test) 58 { 59 size_t len; 60 int error; 61 62 len = sizeof(stored_hostname); 63 error = sysctlbyname(KERN_HOSTNAME_STRING, stored_hostname, &len, 64 NULL, 0); 65 if (error) { 66 warn("priv_sysctl_write_setup: sysctlbyname(\"%s\")", 67 KERN_HOSTNAME_STRING); 68 return (-1); 69 } 70 71 len = sizeof(stored_hostname); 72 error = sysctlbyname(KERN_DOMAINNAME_STRING, stored_domainname, &len, 73 NULL, 0); 74 if (error) { 75 warn("priv_sysctl_write_setup: sysctlbyname(\"%s\")", 76 KERN_DOMAINNAME_STRING); 77 return (-1); 78 } 79 80 return (0); 81 } 82 83 void 84 priv_sysctl_write(int asroot, int injail, struct test *test) 85 { 86 int error; 87 88 error = sysctlbyname(KERN_DOMAINNAME_STRING, NULL, NULL, 89 stored_domainname, strlen(stored_domainname)); 90 if (asroot && injail) 91 expect("priv_sysctl_write(asroot, injail)", error, -1, 92 EPERM); 93 if (asroot && !injail) 94 expect("priv_sysctl_write(asroot, !injail)", error, 0, 0); 95 if (!asroot && injail) 96 expect("priv_sysctl_write(!asroot, injail)", error, -1, 97 EPERM); 98 if (!asroot && !injail) 99 expect("priv_sysctl_write(!asroot, !injail)", error, -1, 100 EPERM); 101 } 102 103 void 104 priv_sysctl_writejail(int asroot, int injail, struct test *test) 105 { 106 int error; 107 108 error = sysctlbyname(KERN_HOSTNAME_STRING, NULL, NULL, 109 stored_hostname, strlen(stored_hostname)); 110 if (asroot && injail) 111 expect("priv_sysctl_writejail(asroot, injail)", error, 0, 0); 112 if (asroot && !injail) 113 expect("priv_sysctl_writejail(asroot, !injail)", error, 0, 0); 114 if (!asroot && injail) 115 expect("priv_sysctl_writejail(!asroot, injail)", error, -1, 116 EPERM); 117 if (!asroot && !injail) 118 expect("priv_sysctl_writejail(!asroot, !injail)", error, -1, 119 EPERM); 120 } 121 122 void 123 priv_sysctl_write_cleanup(int asroot, int injail, struct test *test) 124 { 125 126 } 127