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 "sandbox.h" 34#include "xmalloc.h" 35 36/* Darwin/OS X sandbox */ 37 38struct ssh_sandbox { 39 pid_t child_pid; 40}; 41 42struct ssh_sandbox * 43ssh_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 58void 59ssh_sandbox_child(struct ssh_sandbox *box) 60{ 61 char *errmsg; 62 struct rlimit rl_zero; 63 64 debug3("%s: starting Darwin sandbox", __func__); 65#ifdef __APPLE_SANDBOX_NAMED_EXTERNAL__ 66 if (sandbox_init("/System/Library/Sandbox/Profiles/org.openssh.sshd.sb", 67 SANDBOX_NAMED_EXTERNAL, &errmsg) == -1) 68#else 69 if (sandbox_init(kSBXProfilePureComputation, SANDBOX_NAMED, 70 &errmsg) == -1) 71#endif 72 fatal("%s: sandbox_init: %s", __func__, errmsg); 73 74 /* 75 * The kSBXProfilePureComputation still allows sockets, so 76 * we must disable these using rlimit. 77 */ 78 rl_zero.rlim_cur = rl_zero.rlim_max = 0; 79 if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1) 80 fatal("%s: setrlimit(RLIMIT_FSIZE, { 0, 0 }): %s", 81 __func__, strerror(errno)); 82 if (setrlimit(RLIMIT_NOFILE, &rl_zero) == -1) 83 fatal("%s: setrlimit(RLIMIT_NOFILE, { 0, 0 }): %s", 84 __func__, strerror(errno)); 85 if (setrlimit(RLIMIT_NPROC, &rl_zero) == -1) 86 fatal("%s: setrlimit(RLIMIT_NPROC, { 0, 0 }): %s", 87 __func__, strerror(errno)); 88} 89 90void 91ssh_sandbox_parent_finish(struct ssh_sandbox *box) 92{ 93 free(box); 94 debug3("%s: finished", __func__); 95} 96 97void 98ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid) 99{ 100 box->child_pid = child_pid; 101} 102 103#endif /* SANDBOX_DARWIN */ 104