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 pid_t child_pid; 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 box->child_pid = 0; 55 56 return box; 57 } 58 59 void 60 ssh_sandbox_child(struct ssh_sandbox *box) 61 { 62 char *errmsg; 63 struct rlimit rl_zero; 64 65 debug3("%s: starting Darwin sandbox", __func__); 66 if (sandbox_init(kSBXProfilePureComputation, SANDBOX_NAMED, 67 &errmsg) == -1) 68 fatal("%s: sandbox_init: %s", __func__, errmsg); 69 70 /* 71 * The kSBXProfilePureComputation still allows sockets, so 72 * we must disable these using rlimit. 73 */ 74 rl_zero.rlim_cur = rl_zero.rlim_max = 0; 75 if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1) 76 fatal("%s: setrlimit(RLIMIT_FSIZE, { 0, 0 }): %s", 77 __func__, strerror(errno)); 78 if (setrlimit(RLIMIT_NOFILE, &rl_zero) == -1) 79 fatal("%s: setrlimit(RLIMIT_NOFILE, { 0, 0 }): %s", 80 __func__, strerror(errno)); 81 if (setrlimit(RLIMIT_NPROC, &rl_zero) == -1) 82 fatal("%s: setrlimit(RLIMIT_NPROC, { 0, 0 }): %s", 83 __func__, strerror(errno)); 84 } 85 86 void 87 ssh_sandbox_parent_finish(struct ssh_sandbox *box) 88 { 89 free(box); 90 debug3("%s: finished", __func__); 91 } 92 93 void 94 ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid) 95 { 96 box->child_pid = child_pid; 97 } 98 99 #endif /* SANDBOX_DARWIN */ 100