Darren Tucker | 7a8afe3 | 2010-11-05 13:07:24 +1100 | [diff] [blame^] | 1 | /* $Id: platform.c,v 1.10 2010/11/05 02:07:25 dtucker Exp $ */ |
Damien Miller | 1b06dc3 | 2006-08-31 03:24:41 +1000 | [diff] [blame] | 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2006 Darren Tucker. All rights reserved. |
| 5 | * |
| 6 | * Permission to use, copy, modify, and distribute this software for any |
| 7 | * purpose with or without fee is hereby granted, provided that the above |
| 8 | * copyright notice and this permission notice appear in all copies. |
| 9 | * |
| 10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 17 | */ |
| 18 | |
| 19 | #include "config.h" |
| 20 | #include "platform.h" |
| 21 | |
| 22 | #include "openbsd-compat/openbsd-compat.h" |
| 23 | |
Darren Tucker | 728d837 | 2010-11-05 13:00:05 +1100 | [diff] [blame] | 24 | extern int use_privsep; |
| 25 | |
Damien Miller | 1b06dc3 | 2006-08-31 03:24:41 +1000 | [diff] [blame] | 26 | void |
Darren Tucker | c8802aa | 2009-12-08 13:39:48 +1100 | [diff] [blame] | 27 | platform_pre_listen(void) |
| 28 | { |
| 29 | #ifdef LINUX_OOM_ADJUST |
| 30 | /* Adjust out-of-memory killer so listening process is not killed */ |
| 31 | oom_adjust_setup(); |
| 32 | #endif |
| 33 | } |
| 34 | |
| 35 | void |
Damien Miller | 1b06dc3 | 2006-08-31 03:24:41 +1000 | [diff] [blame] | 36 | platform_pre_fork(void) |
| 37 | { |
| 38 | #ifdef USE_SOLARIS_PROCESS_CONTRACTS |
| 39 | solaris_contract_pre_fork(); |
| 40 | #endif |
| 41 | } |
| 42 | |
| 43 | void |
| 44 | platform_post_fork_parent(pid_t child_pid) |
| 45 | { |
| 46 | #ifdef USE_SOLARIS_PROCESS_CONTRACTS |
| 47 | solaris_contract_post_fork_parent(child_pid); |
| 48 | #endif |
| 49 | } |
| 50 | |
| 51 | void |
| 52 | platform_post_fork_child(void) |
| 53 | { |
| 54 | #ifdef USE_SOLARIS_PROCESS_CONTRACTS |
| 55 | solaris_contract_post_fork_child(); |
| 56 | #endif |
Darren Tucker | c8802aa | 2009-12-08 13:39:48 +1100 | [diff] [blame] | 57 | #ifdef LINUX_OOM_ADJUST |
| 58 | oom_adjust_restore(); |
| 59 | #endif |
Damien Miller | 1b06dc3 | 2006-08-31 03:24:41 +1000 | [diff] [blame] | 60 | } |
Darren Tucker | 1bf3503 | 2009-12-21 10:49:21 +1100 | [diff] [blame] | 61 | |
Darren Tucker | 920612e | 2010-11-05 12:36:15 +1100 | [diff] [blame] | 62 | /* |
| 63 | * This gets called before switching UIDs, and is called even when sshd is |
| 64 | * not running as root. |
| 65 | */ |
Darren Tucker | 9752835 | 2010-11-05 12:03:05 +1100 | [diff] [blame] | 66 | void |
| 67 | platform_setusercontext(struct passwd *pw) |
| 68 | { |
Darren Tucker | 920612e | 2010-11-05 12:36:15 +1100 | [diff] [blame] | 69 | #ifdef WITH_SELINUX |
| 70 | /* Cache selinux status for later use */ |
| 71 | (void)ssh_selinux_enabled(); |
| 72 | #endif |
| 73 | |
Darren Tucker | 9752835 | 2010-11-05 12:03:05 +1100 | [diff] [blame] | 74 | #ifdef USE_SOLARIS_PROJECTS |
| 75 | /* if solaris projects were detected, set the default now */ |
| 76 | if (getuid() == 0 || geteuid() == 0) |
| 77 | solaris_set_default_project(pw); |
| 78 | #endif |
Darren Tucker | 44a97be | 2010-11-05 12:45:18 +1100 | [diff] [blame] | 79 | |
| 80 | #if defined(HAVE_LOGIN_CAP) && defined (__bsdi__) |
Darren Tucker | fd4d8aa | 2010-11-05 12:50:41 +1100 | [diff] [blame] | 81 | if (getuid() == 0 || geteuid() == 0) |
| 82 | setpgid(0, 0); |
Darren Tucker | 44a97be | 2010-11-05 12:45:18 +1100 | [diff] [blame] | 83 | # endif |
Darren Tucker | 728d837 | 2010-11-05 13:00:05 +1100 | [diff] [blame] | 84 | |
| 85 | #if defined(HAVE_LOGIN_CAP) && defined(USE_PAM) |
| 86 | /* |
| 87 | * If we have both LOGIN_CAP and PAM, we want to establish creds |
| 88 | * before calling setusercontext (in session.c:do_setusercontext). |
| 89 | */ |
| 90 | if (getuid() == 0 || geteuid() == 0) { |
| 91 | if (options.use_pam) { |
| 92 | do_pam_setcred(use_privsep); |
| 93 | } |
| 94 | } |
| 95 | # endif /* USE_PAM */ |
Darren Tucker | 9752835 | 2010-11-05 12:03:05 +1100 | [diff] [blame] | 96 | } |
| 97 | |
Darren Tucker | 920612e | 2010-11-05 12:36:15 +1100 | [diff] [blame] | 98 | /* |
| 99 | * This gets called after we've established the user's groups, and is only |
| 100 | * called if sshd is running as root. |
| 101 | */ |
| 102 | void |
| 103 | platform_setusercontext_post_groups(struct passwd *pw) |
| 104 | { |
Darren Tucker | 7a8afe3 | 2010-11-05 13:07:24 +1100 | [diff] [blame^] | 105 | #if !defined(HAVE_LOGIN_CAP) && defined(USE_LIBIAF) |
| 106 | if (set_id(pw->pw_name) != 0) { |
| 107 | exit(1); |
| 108 | } |
| 109 | # endif /* USE_LIBIAF */ |
| 110 | |
Darren Tucker | 4db3807 | 2010-11-05 12:41:13 +1100 | [diff] [blame] | 111 | #ifdef HAVE_SETPCRED |
| 112 | /* |
| 113 | * If we have a chroot directory, we set all creds except real |
| 114 | * uid which we will need for chroot. If we don't have a |
| 115 | * chroot directory, we don't override anything. |
| 116 | */ |
| 117 | { |
| 118 | char **creds = NULL, *chroot_creds[] = |
| 119 | { "REAL_USER=root", NULL }; |
| 120 | |
| 121 | if (options.chroot_directory != NULL && |
| 122 | strcasecmp(options.chroot_directory, "none") != 0) |
| 123 | creds = chroot_creds; |
| 124 | |
| 125 | if (setpcred(pw->pw_name, creds) == -1) |
| 126 | fatal("Failed to set process credentials"); |
| 127 | } |
| 128 | #endif /* HAVE_SETPCRED */ |
Darren Tucker | 920612e | 2010-11-05 12:36:15 +1100 | [diff] [blame] | 129 | #ifdef WITH_SELINUX |
| 130 | ssh_selinux_setup_exec_context(pw->pw_name); |
| 131 | #endif |
| 132 | } |
| 133 | |
Darren Tucker | 1bf3503 | 2009-12-21 10:49:21 +1100 | [diff] [blame] | 134 | char * |
| 135 | platform_krb5_get_principal_name(const char *pw_name) |
| 136 | { |
| 137 | #ifdef USE_AIX_KRB_NAME |
| 138 | return aix_krb5_get_principal_name(pw_name); |
| 139 | #else |
| 140 | return NULL; |
| 141 | #endif |
| 142 | } |