mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-12-11 04:34:32 +00:00
361 lines
9.4 KiB
C
361 lines
9.4 KiB
C
/*
|
|
* Copyright (c) 2006 Chad Mynhier.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "includes.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <errno.h>
|
|
#ifdef HAVE_FCNTL_H
|
|
# include <fcntl.h>
|
|
#endif
|
|
#include <stdarg.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "log.h"
|
|
|
|
#ifdef USE_SOLARIS_PROCESS_CONTRACTS
|
|
|
|
#include <libcontract.h>
|
|
#include <sys/contract/process.h>
|
|
#include <sys/ctfs.h>
|
|
|
|
#define CT_TEMPLATE CTFS_ROOT "/process/template"
|
|
#define CT_LATEST CTFS_ROOT "/process/latest"
|
|
|
|
static int tmpl_fd = -1;
|
|
|
|
/* Lookup the latest process contract */
|
|
static ctid_t
|
|
get_active_process_contract_id(void)
|
|
{
|
|
int stat_fd;
|
|
ctid_t ctid = -1;
|
|
ct_stathdl_t stathdl;
|
|
|
|
if ((stat_fd = open64(CT_LATEST, O_RDONLY)) == -1) {
|
|
error("%s: Error opening 'latest' process "
|
|
"contract: %s", __func__, strerror(errno));
|
|
return -1;
|
|
}
|
|
if (ct_status_read(stat_fd, CTD_COMMON, &stathdl) != 0) {
|
|
error("%s: Error reading process contract "
|
|
"status: %s", __func__, strerror(errno));
|
|
goto out;
|
|
}
|
|
if ((ctid = ct_status_get_id(stathdl)) < 0) {
|
|
error("%s: Error getting process contract id: %s",
|
|
__func__, strerror(errno));
|
|
goto out;
|
|
}
|
|
|
|
ct_status_free(stathdl);
|
|
out:
|
|
close(stat_fd);
|
|
return ctid;
|
|
}
|
|
|
|
void
|
|
solaris_contract_pre_fork(void)
|
|
{
|
|
if ((tmpl_fd = open64(CT_TEMPLATE, O_RDWR)) == -1) {
|
|
error("%s: open %s: %s", __func__,
|
|
CT_TEMPLATE, strerror(errno));
|
|
return;
|
|
}
|
|
|
|
debug2("%s: setting up process contract template on fd %d",
|
|
__func__, tmpl_fd);
|
|
|
|
/* First we set the template parameters and event sets. */
|
|
if (ct_pr_tmpl_set_param(tmpl_fd, CT_PR_PGRPONLY) != 0) {
|
|
error("%s: Error setting process contract parameter set "
|
|
"(pgrponly): %s", __func__, strerror(errno));
|
|
goto fail;
|
|
}
|
|
if (ct_pr_tmpl_set_fatal(tmpl_fd, CT_PR_EV_HWERR) != 0) {
|
|
error("%s: Error setting process contract template "
|
|
"fatal events: %s", __func__, strerror(errno));
|
|
goto fail;
|
|
}
|
|
if (ct_tmpl_set_critical(tmpl_fd, 0) != 0) {
|
|
error("%s: Error setting process contract template "
|
|
"critical events: %s", __func__, strerror(errno));
|
|
goto fail;
|
|
}
|
|
if (ct_tmpl_set_informative(tmpl_fd, CT_PR_EV_HWERR) != 0) {
|
|
error("%s: Error setting process contract template "
|
|
"informative events: %s", __func__, strerror(errno));
|
|
goto fail;
|
|
}
|
|
|
|
/* Now make this the active template for this process. */
|
|
if (ct_tmpl_activate(tmpl_fd) != 0) {
|
|
error("%s: Error activating process contract "
|
|
"template: %s", __func__, strerror(errno));
|
|
goto fail;
|
|
}
|
|
return;
|
|
|
|
fail:
|
|
if (tmpl_fd != -1) {
|
|
close(tmpl_fd);
|
|
tmpl_fd = -1;
|
|
}
|
|
}
|
|
|
|
void
|
|
solaris_contract_post_fork_child()
|
|
{
|
|
debug2("%s: clearing process contract template on fd %d",
|
|
__func__, tmpl_fd);
|
|
|
|
/* Clear the active template. */
|
|
if (ct_tmpl_clear(tmpl_fd) != 0)
|
|
error("%s: Error clearing active process contract "
|
|
"template: %s", __func__, strerror(errno));
|
|
|
|
close(tmpl_fd);
|
|
tmpl_fd = -1;
|
|
}
|
|
|
|
void
|
|
solaris_contract_post_fork_parent(pid_t pid)
|
|
{
|
|
ctid_t ctid;
|
|
char ctl_path[256];
|
|
int r, ctl_fd = -1, stat_fd = -1;
|
|
|
|
debug2("%s: clearing template (fd %d)", __func__, tmpl_fd);
|
|
|
|
if (tmpl_fd == -1)
|
|
return;
|
|
|
|
/* First clear the active template. */
|
|
if ((r = ct_tmpl_clear(tmpl_fd)) != 0)
|
|
error("%s: Error clearing active process contract "
|
|
"template: %s", __func__, strerror(errno));
|
|
|
|
close(tmpl_fd);
|
|
tmpl_fd = -1;
|
|
|
|
/*
|
|
* If either the fork didn't succeed (pid < 0), or clearing
|
|
* th active contract failed (r != 0), then we have nothing
|
|
* more do.
|
|
*/
|
|
if (r != 0 || pid <= 0)
|
|
return;
|
|
|
|
/* Now lookup and abandon the contract we've created. */
|
|
ctid = get_active_process_contract_id();
|
|
|
|
debug2("%s: abandoning contract id %ld", __func__, ctid);
|
|
|
|
snprintf(ctl_path, sizeof(ctl_path),
|
|
CTFS_ROOT "/process/%ld/ctl", ctid);
|
|
if ((ctl_fd = open64(ctl_path, O_WRONLY)) < 0) {
|
|
error("%s: Error opening process contract "
|
|
"ctl file: %s", __func__, strerror(errno));
|
|
goto fail;
|
|
}
|
|
if (ct_ctl_abandon(ctl_fd) < 0) {
|
|
error("%s: Error abandoning process contract: %s",
|
|
__func__, strerror(errno));
|
|
goto fail;
|
|
}
|
|
close(ctl_fd);
|
|
return;
|
|
|
|
fail:
|
|
if (tmpl_fd != -1) {
|
|
close(tmpl_fd);
|
|
tmpl_fd = -1;
|
|
}
|
|
if (stat_fd != -1)
|
|
close(stat_fd);
|
|
if (ctl_fd != -1)
|
|
close(ctl_fd);
|
|
}
|
|
#endif
|
|
|
|
#ifdef USE_SOLARIS_PROJECTS
|
|
#include <sys/task.h>
|
|
#include <project.h>
|
|
|
|
/*
|
|
* Get/set solaris default project.
|
|
* If we fail, just run along gracefully.
|
|
*/
|
|
void
|
|
solaris_set_default_project(struct passwd *pw)
|
|
{
|
|
struct project *defaultproject;
|
|
struct project tempproject;
|
|
char buf[1024];
|
|
|
|
/* get default project, if we fail just return gracefully */
|
|
if ((defaultproject = getdefaultproj(pw->pw_name, &tempproject, &buf,
|
|
sizeof(buf))) != NULL) {
|
|
/* set default project */
|
|
if (setproject(defaultproject->pj_name, pw->pw_name,
|
|
TASK_NORMAL) != 0)
|
|
debug("setproject(%s): %s", defaultproject->pj_name,
|
|
strerror(errno));
|
|
} else {
|
|
/* debug on getdefaultproj() error */
|
|
debug("getdefaultproj(%s): %s", pw->pw_name, strerror(errno));
|
|
}
|
|
}
|
|
#endif /* USE_SOLARIS_PROJECTS */
|
|
|
|
#ifdef USE_SOLARIS_PRIVS
|
|
# ifdef HAVE_PRIV_H
|
|
# include <priv.h>
|
|
# endif
|
|
|
|
priv_set_t *
|
|
solaris_basic_privset(void)
|
|
{
|
|
priv_set_t *pset;
|
|
|
|
#ifdef HAVE_PRIV_BASICSET
|
|
if ((pset = priv_allocset()) == NULL) {
|
|
error("priv_allocset: %s", strerror(errno));
|
|
return NULL;
|
|
}
|
|
priv_basicset(pset);
|
|
#else
|
|
if ((pset = priv_str_to_set("basic", ",", NULL)) == NULL) {
|
|
error("priv_str_to_set: %s", strerror(errno));
|
|
return NULL;
|
|
}
|
|
#endif
|
|
return pset;
|
|
}
|
|
|
|
void
|
|
solaris_drop_privs_pinfo_net_fork_exec(void)
|
|
{
|
|
priv_set_t *pset = NULL, *npset = NULL;
|
|
|
|
/*
|
|
* Note: this variant avoids dropping DAC filesystem rights, in case
|
|
* the process calling it is running as root and should have the
|
|
* ability to read/write/chown any file on the system.
|
|
*
|
|
* We start with the basic set, then *add* the DAC rights to it while
|
|
* taking away other parts of BASIC we don't need. Then we intersect
|
|
* this with our existing PERMITTED set. In this way we keep any
|
|
* DAC rights we had before, while otherwise reducing ourselves to
|
|
* the minimum set of privileges we need to proceed.
|
|
*
|
|
* This also means we drop any other parts of "root" that we don't
|
|
* need (e.g. the ability to kill any process, create new device nodes
|
|
* etc etc).
|
|
*/
|
|
|
|
if ((pset = priv_allocset()) == NULL)
|
|
fatal("priv_allocset: %s", strerror(errno));
|
|
if ((npset = solaris_basic_privset()) == NULL)
|
|
fatal("solaris_basic_privset: %s", strerror(errno));
|
|
|
|
if (priv_addset(npset, PRIV_FILE_CHOWN) != 0 ||
|
|
priv_addset(npset, PRIV_FILE_DAC_READ) != 0 ||
|
|
priv_addset(npset, PRIV_FILE_DAC_SEARCH) != 0 ||
|
|
priv_addset(npset, PRIV_FILE_DAC_WRITE) != 0 ||
|
|
priv_addset(npset, PRIV_FILE_OWNER) != 0)
|
|
fatal("priv_addset: %s", strerror(errno));
|
|
|
|
if (priv_delset(npset, PRIV_PROC_EXEC) != 0 ||
|
|
#ifdef PRIV_NET_ACCESS
|
|
priv_delset(npset, PRIV_NET_ACCESS) != 0 ||
|
|
#endif
|
|
priv_delset(npset, PRIV_PROC_FORK) != 0 ||
|
|
priv_delset(npset, PRIV_PROC_INFO) != 0 ||
|
|
priv_delset(npset, PRIV_PROC_SESSION) != 0)
|
|
fatal("priv_delset: %s", strerror(errno));
|
|
|
|
if (getppriv(PRIV_PERMITTED, pset) != 0)
|
|
fatal("getppriv: %s", strerror(errno));
|
|
|
|
priv_intersect(pset, npset);
|
|
|
|
if (setppriv(PRIV_SET, PRIV_PERMITTED, npset) != 0 ||
|
|
setppriv(PRIV_SET, PRIV_LIMIT, npset) != 0 ||
|
|
setppriv(PRIV_SET, PRIV_INHERITABLE, npset) != 0)
|
|
fatal("setppriv: %s", strerror(errno));
|
|
|
|
priv_freeset(pset);
|
|
priv_freeset(npset);
|
|
}
|
|
|
|
void
|
|
solaris_drop_privs_root_pinfo_net(void)
|
|
{
|
|
priv_set_t *pset = NULL;
|
|
|
|
/* Start with "basic" and drop everything we don't need. */
|
|
if ((pset = solaris_basic_privset()) == NULL)
|
|
fatal("solaris_basic_privset: %s", strerror(errno));
|
|
|
|
if (priv_delset(pset, PRIV_FILE_LINK_ANY) != 0 ||
|
|
#ifdef PRIV_NET_ACCESS
|
|
priv_delset(pset, PRIV_NET_ACCESS) != 0 ||
|
|
#endif
|
|
priv_delset(pset, PRIV_PROC_INFO) != 0 ||
|
|
priv_delset(pset, PRIV_PROC_SESSION) != 0)
|
|
fatal("priv_delset: %s", strerror(errno));
|
|
|
|
if (setppriv(PRIV_SET, PRIV_PERMITTED, pset) != 0 ||
|
|
setppriv(PRIV_SET, PRIV_LIMIT, pset) != 0 ||
|
|
setppriv(PRIV_SET, PRIV_INHERITABLE, pset) != 0)
|
|
fatal("setppriv: %s", strerror(errno));
|
|
|
|
priv_freeset(pset);
|
|
}
|
|
|
|
void
|
|
solaris_drop_privs_root_pinfo_net_exec(void)
|
|
{
|
|
priv_set_t *pset = NULL;
|
|
|
|
|
|
/* Start with "basic" and drop everything we don't need. */
|
|
if ((pset = solaris_basic_privset()) == NULL)
|
|
fatal("solaris_basic_privset: %s", strerror(errno));
|
|
|
|
if (priv_delset(pset, PRIV_FILE_LINK_ANY) != 0 ||
|
|
#ifdef PRIV_NET_ACCESS
|
|
priv_delset(pset, PRIV_NET_ACCESS) != 0 ||
|
|
#endif
|
|
priv_delset(pset, PRIV_PROC_EXEC) != 0 ||
|
|
priv_delset(pset, PRIV_PROC_INFO) != 0)
|
|
fatal("priv_delset: %s", strerror(errno));
|
|
|
|
if (setppriv(PRIV_SET, PRIV_PERMITTED, pset) != 0 ||
|
|
setppriv(PRIV_SET, PRIV_LIMIT, pset) != 0 ||
|
|
setppriv(PRIV_SET, PRIV_INHERITABLE, pset) != 0)
|
|
fatal("setppriv: %s", strerror(errno));
|
|
|
|
priv_freeset(pset);
|
|
}
|
|
|
|
#endif
|