1 /* 2 * Copyright (c) 2011 Damien Miller <djm (at) 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 "sandbox.h" 34 #include "xmalloc.h" 35 36 /* Darwin/OS X sandbox */ 37 38 struct ssh_sandbox { 39 pid_t child_pid; 40 }; 41 42 struct ssh_sandbox * 43 ssh_sandbox_init(void) 44 { 45 struct ssh_sandbox *box; 46 47 /* 48 * Strictly, we don't need to maintain any state here but we need 49 * to return non-NULL to satisfy the API. 50 */ 51 debug3("%s: preparing Darwin sandbox", __func__); 52 box = xcalloc(1, sizeof(*box)); 53 box->child_pid = 0; 54 55 return box; 56 } 57 58 void 59 ssh_sandbox_child(struct ssh_sandbox *box) 60 { 61 char *errmsg; 62 struct rlimit rl_zero; 63 64 debug3("%s: starting Darwin sandbox", __func__); 65 if (sandbox_init(kSBXProfilePureComputation, SANDBOX_NAMED, 66 &errmsg) == -1) 67 fatal("%s: sandbox_init: %s", __func__, errmsg); 68 69 /* 70 * The kSBXProfilePureComputation still allows sockets, so 71 * we must disable these using rlimit. 72 */ 73 rl_zero.rlim_cur = rl_zero.rlim_max = 0; 74 if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1) 75 fatal("%s: setrlimit(RLIMIT_FSIZE, { 0, 0 }): %s", 76 __func__, strerror(errno)); 77 if (setrlimit(RLIMIT_NOFILE, &rl_zero) == -1) 78 fatal("%s: setrlimit(RLIMIT_NOFILE, { 0, 0 }): %s", 79 __func__, strerror(errno)); 80 if (setrlimit(RLIMIT_NPROC, &rl_zero) == -1) 81 fatal("%s: setrlimit(RLIMIT_NPROC, { 0, 0 }): %s", 82 __func__, strerror(errno)); 83 } 84 85 void 86 ssh_sandbox_parent_finish(struct ssh_sandbox *box) 87 { 88 free(box); 89 debug3("%s: finished", __func__); 90 } 91 92 void 93 ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid) 94 { 95 box->child_pid = child_pid; 96 } 97 98 #endif /* SANDBOX_DARWIN */ 99
