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 * $FreeBSD$ 31 */ 32 33 /* 34 * Two privileges exist for writing sysctls -- one for sysctls writable only 35 * outside of jail (PRIV_SYSCTL_WRITE) and one for those also writable inside 36 * jail (PRIV_SYSCTL_WRITEJAIL). 37 * 38 * Test the prior by attempting to write to kern.domainname, and the latter 39 * by attempting to write to kern.hostname. 40 */ 41 42 #include <sys/types.h> 43 #include <sys/sysctl.h> 44 45 #include <err.h> 46 #include <errno.h> 47 #include <string.h> 48 #include <unistd.h> 49 50 #include "main.h" 51 52 #define KERN_HOSTNAME_STRING "kern.hostname" 53 #define KERN_DOMAINNAME_STRING "kern.domainname" 54 55 static char stored_hostname[1024]; 56 static char stored_domainname[1024]; 57 58 int 59 priv_sysctl_write_setup(int asroot, int injail, struct test *test) 60 { 61 size_t len; 62 int error; 63 64 len = sizeof(stored_hostname); 65 error = sysctlbyname(KERN_HOSTNAME_STRING, stored_hostname, &len, 66 NULL, 0); 67 if (error) { 68 warn("priv_sysctl_write_setup: sysctlbyname(\"%s\")", 69 KERN_HOSTNAME_STRING); 70 return (-1); 71 } 72 73 len = sizeof(stored_hostname); 74 error = sysctlbyname(KERN_DOMAINNAME_STRING, stored_domainname, &len, 75 NULL, 0); 76 if (error) { 77 warn("priv_sysctl_write_setup: sysctlbyname(\"%s\")", 78 KERN_DOMAINNAME_STRING); 79 return (-1); 80 } 81 82 return (0); 83 } 84 85 void 86 priv_sysctl_write(int asroot, int injail, struct test *test) 87 { 88 int error; 89 90 error = sysctlbyname(KERN_DOMAINNAME_STRING, NULL, NULL, 91 stored_domainname, strlen(stored_domainname)); 92 if (asroot && injail) 93 expect("priv_sysctl_write(asroot, injail)", error, -1, 94 EPERM); 95 if (asroot && !injail) 96 expect("priv_sysctl_write(asroot, !injail)", error, 0, 0); 97 if (!asroot && injail) 98 expect("priv_sysctl_write(!asroot, injail)", error, -1, 99 EPERM); 100 if (!asroot && !injail) 101 expect("priv_sysctl_write(!asroot, !injail)", error, -1, 102 EPERM); 103 } 104 105 void 106 priv_sysctl_writejail(int asroot, int injail, struct test *test) 107 { 108 int error; 109 110 error = sysctlbyname(KERN_HOSTNAME_STRING, NULL, NULL, 111 stored_hostname, strlen(stored_hostname)); 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, 0, 0); 116 if (!asroot && injail) 117 expect("priv_sysctl_writejail(!asroot, injail)", error, -1, 118 EPERM); 119 if (!asroot && !injail) 120 expect("priv_sysctl_writejail(!asroot, !injail)", error, -1, 121 EPERM); 122 } 123 124 void 125 priv_sysctl_write_cleanup(int asroot, int injail, struct test *test) 126 { 127 128 } 129