4f52dfbb8d
This completely removes client-side support for the SSH 1 protocol, which was already disabled in 12 but is still enabled in 11. For that reason, we will not be able to merge 7.6p1 or newer back to 11.
200 lines
4.7 KiB
C
200 lines
4.7 KiB
C
/*
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* Copyright (c) 2006 Darren Tucker. All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "includes.h"
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#include <stdarg.h>
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#include <unistd.h>
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#include "log.h"
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#include "buffer.h"
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#include "misc.h"
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#include "servconf.h"
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#include "key.h"
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#include "hostfile.h"
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#include "auth.h"
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#include "auth-pam.h"
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#include "platform.h"
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#include "openbsd-compat/openbsd-compat.h"
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extern int use_privsep;
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extern ServerOptions options;
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void
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platform_pre_listen(void)
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{
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#ifdef LINUX_OOM_ADJUST
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/* Adjust out-of-memory killer so listening process is not killed */
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oom_adjust_setup();
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#endif
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}
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void
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platform_pre_fork(void)
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{
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#ifdef USE_SOLARIS_PROCESS_CONTRACTS
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solaris_contract_pre_fork();
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#endif
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}
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void
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platform_pre_restart(void)
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{
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#ifdef LINUX_OOM_ADJUST
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oom_adjust_restore();
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#endif
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}
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void
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platform_post_fork_parent(pid_t child_pid)
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{
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#ifdef USE_SOLARIS_PROCESS_CONTRACTS
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solaris_contract_post_fork_parent(child_pid);
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#endif
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}
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void
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platform_post_fork_child(void)
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{
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#ifdef USE_SOLARIS_PROCESS_CONTRACTS
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solaris_contract_post_fork_child();
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#endif
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#ifdef LINUX_OOM_ADJUST
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oom_adjust_restore();
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#endif
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}
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/* return 1 if we are running with privilege to swap UIDs, 0 otherwise */
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int
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platform_privileged_uidswap(void)
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{
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#ifdef HAVE_CYGWIN
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/* uid 0 is not special on Cygwin so always try */
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return 1;
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#else
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return (getuid() == 0 || geteuid() == 0);
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#endif
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}
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/*
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* This gets called before switching UIDs, and is called even when sshd is
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* not running as root.
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*/
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void
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platform_setusercontext(struct passwd *pw)
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{
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#ifdef WITH_SELINUX
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/* Cache selinux status for later use */
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(void)ssh_selinux_enabled();
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#endif
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#ifdef USE_SOLARIS_PROJECTS
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/*
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* If solaris projects were detected, set the default now, unless
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* we are using PAM in which case it is the responsibility of the
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* PAM stack.
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*/
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if (!options.use_pam && (getuid() == 0 || geteuid() == 0))
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solaris_set_default_project(pw);
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#endif
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#if defined(HAVE_LOGIN_CAP) && defined (__bsdi__)
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if (getuid() == 0 || geteuid() == 0)
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setpgid(0, 0);
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# endif
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#if defined(HAVE_LOGIN_CAP) && defined(USE_PAM)
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/*
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* If we have both LOGIN_CAP and PAM, we want to establish creds
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* before calling setusercontext (in session.c:do_setusercontext).
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*/
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if (getuid() == 0 || geteuid() == 0) {
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if (options.use_pam) {
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do_pam_setcred(use_privsep);
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}
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}
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# endif /* USE_PAM */
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#if !defined(HAVE_LOGIN_CAP) && defined(HAVE_GETLUID) && defined(HAVE_SETLUID)
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if (getuid() == 0 || geteuid() == 0) {
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/* Sets login uid for accounting */
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if (getluid() == -1 && setluid(pw->pw_uid) == -1)
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error("setluid: %s", strerror(errno));
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}
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#endif
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}
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/*
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* This gets called after we've established the user's groups, and is only
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* called if sshd is running as root.
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*/
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void
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platform_setusercontext_post_groups(struct passwd *pw)
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{
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#if !defined(HAVE_LOGIN_CAP) && defined(USE_PAM)
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/*
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* PAM credentials may take the form of supplementary groups.
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* These will have been wiped by the above initgroups() call.
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* Reestablish them here.
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*/
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if (options.use_pam) {
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do_pam_setcred(use_privsep);
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}
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#endif /* USE_PAM */
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#if !defined(HAVE_LOGIN_CAP) && (defined(WITH_IRIX_PROJECT) || \
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defined(WITH_IRIX_JOBS) || defined(WITH_IRIX_ARRAY))
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irix_setusercontext(pw);
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#endif /* defined(WITH_IRIX_PROJECT) || defined(WITH_IRIX_JOBS) || defined(WITH_IRIX_ARRAY) */
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#ifdef _AIX
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aix_usrinfo(pw);
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#endif /* _AIX */
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#ifdef HAVE_SETPCRED
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/*
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* If we have a chroot directory, we set all creds except real
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* uid which we will need for chroot. If we don't have a
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* chroot directory, we don't override anything.
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*/
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{
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char **creds = NULL, *chroot_creds[] =
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{ "REAL_USER=root", NULL };
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if (options.chroot_directory != NULL &&
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strcasecmp(options.chroot_directory, "none") != 0)
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creds = chroot_creds;
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if (setpcred(pw->pw_name, creds) == -1)
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fatal("Failed to set process credentials");
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}
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#endif /* HAVE_SETPCRED */
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#ifdef WITH_SELINUX
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ssh_selinux_setup_exec_context(pw->pw_name);
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#endif
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}
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char *
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platform_krb5_get_principal_name(const char *pw_name)
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{
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#ifdef USE_AIX_KRB_NAME
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return aix_krb5_get_principal_name(pw_name);
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#else
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return NULL;
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#endif
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}
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