1 /*- 2 * Copyright (c) 2009-2011 Robert N. M. Watson 3 * Copyright (c) 2011 Jonathan Anderson 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 /* 29 * Test that fcntl works in capability mode. 30 */ 31 32 #include <sys/types.h> 33 #include <sys/capsicum.h> 34 #include <sys/errno.h> 35 #include <sys/ipc.h> 36 #include <sys/mman.h> 37 #include <sys/socket.h> 38 #include <sys/stat.h> 39 #include <sys/sysctl.h> 40 #include <sys/wait.h> 41 42 #include <err.h> 43 #include <fcntl.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 48 #include "cap_test.h" 49 50 /* A filename->descriptor mapping. */ 51 struct fd { 52 char *f_name; 53 int f_fd; 54 }; 55 56 /* 57 * Ensure that fcntl() works consistently for both regular file descriptors and 58 * capability-wrapped ones. 59 */ 60 int 61 test_fcntl(void) 62 { 63 int success = PASSED; 64 cap_rights_t rights = CAP_READ | CAP_FCNTL; 65 66 /* 67 * Open some files of different types, and wrap them in capabilities. 68 */ 69 struct fd files[] = { 70 { "file", open("/etc/passwd", O_RDONLY) }, 71 { "socket", socket(PF_LOCAL, SOCK_STREAM, 0) }, 72 { "SHM", shm_open(SHM_ANON, O_RDWR, 0600) }, 73 }; 74 REQUIRE(files[0].f_fd); 75 REQUIRE(files[1].f_fd); 76 REQUIRE(files[2].f_fd); 77 78 struct fd caps[] = { 79 { "file cap", cap_new(files[0].f_fd, rights) }, 80 { "socket cap", cap_new(files[1].f_fd, rights) }, 81 { "SHM cap", cap_new(files[2].f_fd, rights) }, 82 }; 83 REQUIRE(caps[0].f_fd); 84 REQUIRE(caps[1].f_fd); 85 REQUIRE(caps[2].f_fd); 86 87 struct fd all[] = { 88 files[0], caps[0], 89 files[1], caps[1], 90 files[2], caps[2], 91 }; 92 const size_t len = sizeof(all) / sizeof(struct fd); 93 94 REQUIRE(cap_enter()); 95 96 /* 97 * Ensure that we can fcntl() all the files that we opened above. 98 */ 99 for (size_t i = 0; i < len; i++) 100 { 101 struct fd f = all[i]; 102 int cap; 103 104 CHECK_SYSCALL_SUCCEEDS(fcntl, f.f_fd, F_GETFL, 0); 105 REQUIRE(cap = cap_new(f.f_fd, CAP_READ)); 106 if (fcntl(f.f_fd, F_GETFL, 0) == -1) 107 FAIL("Error calling fcntl('%s', F_GETFL)", f.f_name); 108 else 109 CHECK_NOTCAPABLE(fcntl, cap, F_GETFL, 0); 110 } 111 112 return (success); 113 } 114 115