1 /* 2 * Copyright (c) 2011 Damien Miller <djm@mindrot.org> 3 * 4 * Permission to use, copy, modify, and distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include "includes.h" 18 19 #ifdef SANDBOX_DARWIN 20 21 #include <sys/types.h> 22 23 #include <sandbox.h> 24 25 #include <errno.h> 26 #include <stdarg.h> 27 #include <stdio.h> 28 #include <stdlib.h> 29 #include <string.h> 30 #include <unistd.h> 31 32 #include "log.h" 33 #include "ssh-sandbox.h" 34 #include "monitor.h" 35 #include "xmalloc.h" 36 37 /* Darwin/OS X sandbox */ 38 39 struct ssh_sandbox { 40 int junk; 41 }; 42 43 struct ssh_sandbox * 44 ssh_sandbox_init(struct monitor *monitor) 45 { 46 struct ssh_sandbox *box; 47 48 /* 49 * Strictly, we don't need to maintain any state here but we need 50 * to return non-NULL to satisfy the API. 51 */ 52 debug3("%s: preparing Darwin sandbox", __func__); 53 box = xcalloc(1, sizeof(*box)); 54 return box; 55 } 56 57 void 58 ssh_sandbox_child(struct ssh_sandbox *box) 59 { 60 char *errmsg; 61 struct rlimit rl_zero; 62 63 debug3("%s: starting Darwin sandbox", __func__); 64 if (sandbox_init(kSBXProfilePureComputation, SANDBOX_NAMED, 65 &errmsg) == -1) 66 fatal("%s: sandbox_init: %s", __func__, errmsg); 67 68 /* 69 * The kSBXProfilePureComputation still allows sockets, so 70 * we must disable these using rlimit. 71 */ 72 rl_zero.rlim_cur = rl_zero.rlim_max = 0; 73 if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1) 74 fatal("%s: setrlimit(RLIMIT_FSIZE, { 0, 0 }): %s", 75 __func__, strerror(errno)); 76 if (setrlimit(RLIMIT_NOFILE, &rl_zero) == -1) 77 fatal("%s: setrlimit(RLIMIT_NOFILE, { 0, 0 }): %s", 78 __func__, strerror(errno)); 79 if (setrlimit(RLIMIT_NPROC, &rl_zero) == -1) 80 fatal("%s: setrlimit(RLIMIT_NPROC, { 0, 0 }): %s", 81 __func__, strerror(errno)); 82 } 83 84 #endif /* SANDBOX_DARWIN */ 85