Damien Miller | 4626cba | 2016-01-08 14:24:56 +1100 | [diff] [blame] | 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 | |
| 41 | struct ssh_sandbox { |
| 42 | priv_set_t *pset; |
| 43 | }; |
| 44 | |
| 45 | struct ssh_sandbox * |
| 46 | ssh_sandbox_init(struct monitor *monitor) |
| 47 | { |
| 48 | struct ssh_sandbox *box = NULL; |
| 49 | |
| 50 | box = xcalloc(1, sizeof(*box)); |
Darren Tucker | 907091a | 2016-02-19 09:05:39 +1100 | [diff] [blame] | 51 | |
| 52 | /* Start with "basic" and drop everything we don't need. */ |
| 53 | box->pset = solaris_basic_privset(); |
Damien Miller | 4626cba | 2016-01-08 14:24:56 +1100 | [diff] [blame] | 54 | |
| 55 | if (box->pset == NULL) { |
| 56 | free(box); |
| 57 | return NULL; |
| 58 | } |
| 59 | |
Damien Miller | 4626cba | 2016-01-08 14:24:56 +1100 | [diff] [blame] | 60 | /* Drop everything except the ability to use already-opened files */ |
| 61 | if (priv_delset(box->pset, PRIV_FILE_LINK_ANY) != 0 || |
Darren Tucker | 907091a | 2016-02-19 09:05:39 +1100 | [diff] [blame] | 62 | #ifdef PRIV_NET_ACCESS |
Damien Miller | 4626cba | 2016-01-08 14:24:56 +1100 | [diff] [blame] | 63 | priv_delset(box->pset, PRIV_NET_ACCESS) != 0 || |
Darren Tucker | 907091a | 2016-02-19 09:05:39 +1100 | [diff] [blame] | 64 | #endif |
Damien Miller | 4626cba | 2016-01-08 14:24:56 +1100 | [diff] [blame] | 65 | priv_delset(box->pset, PRIV_PROC_EXEC) != 0 || |
| 66 | priv_delset(box->pset, PRIV_PROC_FORK) != 0 || |
| 67 | priv_delset(box->pset, PRIV_PROC_INFO) != 0 || |
| 68 | priv_delset(box->pset, PRIV_PROC_SESSION) != 0) { |
| 69 | free(box); |
| 70 | return NULL; |
| 71 | } |
| 72 | |
| 73 | /* These may not be available on older Solaris-es */ |
| 74 | # if defined(PRIV_FILE_READ) && defined(PRIV_FILE_WRITE) |
| 75 | if (priv_delset(box->pset, PRIV_FILE_READ) != 0 || |
| 76 | priv_delset(box->pset, PRIV_FILE_WRITE) != 0) { |
| 77 | free(box); |
| 78 | return NULL; |
| 79 | } |
| 80 | # endif |
| 81 | |
| 82 | return box; |
| 83 | } |
| 84 | |
| 85 | void |
| 86 | ssh_sandbox_child(struct ssh_sandbox *box) |
| 87 | { |
| 88 | if (setppriv(PRIV_SET, PRIV_PERMITTED, box->pset) != 0 || |
| 89 | setppriv(PRIV_SET, PRIV_LIMIT, box->pset) != 0 || |
| 90 | setppriv(PRIV_SET, PRIV_INHERITABLE, box->pset) != 0) |
| 91 | fatal("setppriv: %s", strerror(errno)); |
| 92 | } |
| 93 | |
| 94 | void |
| 95 | ssh_sandbox_parent_finish(struct ssh_sandbox *box) |
| 96 | { |
| 97 | priv_freeset(box->pset); |
| 98 | box->pset = NULL; |
| 99 | free(box); |
| 100 | } |
| 101 | |
| 102 | void |
| 103 | ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid) |
| 104 | { |
| 105 | /* Nothing to do here */ |
| 106 | } |
| 107 | |
| 108 | #endif /* SANDBOX_SOLARIS */ |