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#include "includes.h"
#include "auth.h"
#include "log.h"
#ifdef WITH_SELINUX
#include <selinux/selinux.h>
#include <selinux/flask.h>
#include <selinux/context.h>
#include <selinux/get_context_list.h>
#include <selinux/get_default_type.h>
extern Authctxt *the_authctxt;
static security_context_t
selinux_get_user_context(const char *name)
{
security_context_t user_context = NULL;
char *role = NULL;
int ret = 0;
if (the_authctxt)
role = the_authctxt->role;
if (role != NULL && role[0])
ret = get_default_context_with_role(name, role, NULL,
&user_context);
else
ret = get_default_context(name, NULL, &user_context);
if (ret < 0) {
if (security_getenforce() > 0)
fatal("Failed to get default security context for %s.",
name);
else
error("Failed to get default security context for %s. "
"Continuing in permissive mode",
name);
}
return user_context;
}
void
setup_selinux_pty(const char *name, const char *tty)
{
security_context_t new_tty_context, user_context, old_tty_context;
if (is_selinux_enabled() <= 0)
return;
new_tty_context = old_tty_context = NULL;
user_context = selinux_get_user_context(name);
if (getfilecon(tty, &old_tty_context) < 0) {
error("getfilecon(%.100s) failed: %.100s",
tty, strerror(errno));
} else {
if (security_compute_relabel(user_context, old_tty_context,
SECCLASS_CHR_FILE, &new_tty_context) != 0) {
error("security_compute_relabel(%.100s) failed: "
"%.100s", tty, strerror(errno));
} else {
if (setfilecon(tty, new_tty_context) != 0)
error("setfilecon(%.100s, %s) failed: %.100s",
tty, new_tty_context, strerror(errno));
freecon(new_tty_context);
}
freecon(old_tty_context);
}
if (user_context)
freecon(user_context);
}
void
setup_selinux_exec_context(const char *name)
{
security_context_t user_context;
if (is_selinux_enabled() <= 0)
return;
user_context = selinux_get_user_context(name);
if (setexeccon(user_context)) {
if (security_getenforce() > 0)
fatal("Failed to set exec security context %s for %s.",
user_context, name);
else
error("Failed to set exec security context %s for %s. "
"Continuing in permissive mode",
user_context, name);
}
if (user_context)
freecon(user_context);
}
#else /* WITH_SELINUX */
void
setup_selinux_pty(const char *name, const char *tty)
{
(void) name;
(void) tty;
}
void
setup_selinux_exec_context(const char *name)
{
(void) name;
}
#endif /* WITH_SELINUX */
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