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4626cbaf78
Includes a pre-auth privsep sandbox and several pledge() emulations. bz#2511, patch by Alex Wilson. ok dtucker@
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/*
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* Copyright (c) 2015 Joyent, Inc
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* Author: Alex Wilson <alex.wilson@joyent.com>
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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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#ifdef SANDBOX_SOLARIS
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#ifndef USE_SOLARIS_PRIVS
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# error "--with-solaris-privs must be used with the Solaris sandbox"
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#endif
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#include <sys/types.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef HAVE_PRIV_H
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# include <priv.h>
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#endif
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#include "log.h"
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#include "ssh-sandbox.h"
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#include "xmalloc.h"
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struct ssh_sandbox {
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priv_set_t *pset;
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};
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struct ssh_sandbox *
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ssh_sandbox_init(struct monitor *monitor)
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{
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struct ssh_sandbox *box = NULL;
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box = xcalloc(1, sizeof(*box));
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box->pset = priv_allocset();
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if (box->pset == NULL) {
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free(box);
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return NULL;
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}
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/* Start with "basic" and drop everything we don't need. */
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priv_basicset(box->pset);
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/* Drop everything except the ability to use already-opened files */
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if (priv_delset(box->pset, PRIV_FILE_LINK_ANY) != 0 ||
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priv_delset(box->pset, PRIV_NET_ACCESS) != 0 ||
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priv_delset(box->pset, PRIV_PROC_EXEC) != 0 ||
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priv_delset(box->pset, PRIV_PROC_FORK) != 0 ||
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priv_delset(box->pset, PRIV_PROC_INFO) != 0 ||
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priv_delset(box->pset, PRIV_PROC_SESSION) != 0) {
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free(box);
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return NULL;
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}
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/* These may not be available on older Solaris-es */
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# if defined(PRIV_FILE_READ) && defined(PRIV_FILE_WRITE)
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if (priv_delset(box->pset, PRIV_FILE_READ) != 0 ||
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priv_delset(box->pset, PRIV_FILE_WRITE) != 0) {
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free(box);
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return NULL;
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}
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# endif
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return box;
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}
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void
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ssh_sandbox_child(struct ssh_sandbox *box)
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{
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if (setppriv(PRIV_SET, PRIV_PERMITTED, box->pset) != 0 ||
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setppriv(PRIV_SET, PRIV_LIMIT, box->pset) != 0 ||
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setppriv(PRIV_SET, PRIV_INHERITABLE, box->pset) != 0)
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fatal("setppriv: %s", strerror(errno));
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}
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void
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ssh_sandbox_parent_finish(struct ssh_sandbox *box)
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{
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priv_freeset(box->pset);
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box->pset = NULL;
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free(box);
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}
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void
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ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid)
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{
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/* Nothing to do here */
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}
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#endif /* SANDBOX_SOLARIS */
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