1/* 2 * Copyright (c) 2015 Joyent, Inc 3 * Author: Alex Wilson <alex.wilson@joyent.com> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18#include "includes.h" 19 20#ifdef SANDBOX_SOLARIS 21#ifndef USE_SOLARIS_PRIVS 22# error "--with-solaris-privs must be used with the Solaris sandbox" 23#endif 24 25#include <sys/types.h> 26 27#include <errno.h> 28#include <stdarg.h> 29#include <stdio.h> 30#include <stdlib.h> 31#include <string.h> 32#include <unistd.h> 33#ifdef HAVE_PRIV_H 34# include <priv.h> 35#endif 36 37#include "log.h" 38#include "ssh-sandbox.h" 39#include "xmalloc.h" 40 41struct ssh_sandbox { 42 priv_set_t *pset; 43}; 44 45struct ssh_sandbox * 46ssh_sandbox_init(struct monitor *monitor) 47{ 48 struct ssh_sandbox *box = NULL; 49 50 box = xcalloc(1, sizeof(*box)); 51 52 /* Start with "basic" and drop everything we don't need. */ 53 box->pset = solaris_basic_privset(); 54 55 if (box->pset == NULL) { 56 free(box); 57 return NULL; 58 } 59 60 /* Drop everything except the ability to use already-opened files */ 61 if (priv_delset(box->pset, PRIV_FILE_LINK_ANY) != 0 || 62#ifdef PRIV_NET_ACCESS 63 priv_delset(box->pset, PRIV_NET_ACCESS) != 0 || 64#endif 65#ifdef PRIV_DAX_ACCESS 66 priv_delset(box->pset, PRIV_DAX_ACCESS) != 0 || 67#endif 68#ifdef PRIV_SYS_IB_INFO 69 priv_delset(box->pset, PRIV_SYS_IB_INFO) != 0 || 70#endif 71 priv_delset(box->pset, PRIV_PROC_EXEC) != 0 || 72 priv_delset(box->pset, PRIV_PROC_FORK) != 0 || 73 priv_delset(box->pset, PRIV_PROC_INFO) != 0 || 74 priv_delset(box->pset, PRIV_PROC_SESSION) != 0) { 75 free(box); 76 return NULL; 77 } 78 79 /* These may not be available on older Solaris-es */ 80# if defined(PRIV_FILE_READ) && defined(PRIV_FILE_WRITE) 81 if (priv_delset(box->pset, PRIV_FILE_READ) != 0 || 82 priv_delset(box->pset, PRIV_FILE_WRITE) != 0) { 83 free(box); 84 return NULL; 85 } 86# endif 87 88 return box; 89} 90 91void 92ssh_sandbox_child(struct ssh_sandbox *box) 93{ 94 if (setppriv(PRIV_SET, PRIV_PERMITTED, box->pset) != 0 || 95 setppriv(PRIV_SET, PRIV_LIMIT, box->pset) != 0 || 96 setppriv(PRIV_SET, PRIV_INHERITABLE, box->pset) != 0) 97 fatal("setppriv: %s", strerror(errno)); 98} 99 100void 101ssh_sandbox_parent_finish(struct ssh_sandbox *box) 102{ 103 priv_freeset(box->pset); 104 box->pset = NULL; 105 free(box); 106} 107 108void 109ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid) 110{ 111 /* Nothing to do here */ 112} 113 114#endif /* SANDBOX_SOLARIS */ 115