stuff

1 files changed, 0 insertions, 283 deletions

diff --git a/src/libcore/selinux-access.c b/src/libcore/selinux-access.c
deleted file mode 100644
index a259e128c1..0000000000
--- a/src/libcore/selinux-access.c
+++ /dev/null
@@ -1,283 +0,0 @@
-/***
-  This file is part of systemd.
-
-  Copyright 2012 Dan Walsh
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include "selinux-access.h"
-
-#ifdef HAVE_SELINUX
-
-#include <errno.h>
-#include <selinux/avc.h>
-#include <selinux/selinux.h>
-#include <stdio.h>
-#ifdef HAVE_AUDIT
-#include <libaudit.h>
-#endif
-
-#include <systemd/sd-bus.h>
-
-#include "basic/alloc-util.h"
-#include "audit-fd.h"
-#include "shared/bus-util.h"
-#include "basic/log.h"
-#include "basic/path-util.h"
-#include "basic/selinux-util.h"
-#include "basic/stdio-util.h"
-#include "basic/strv.h"
-#include "basic/util.h"
-
-static bool initialized = false;
-
-struct audit_info {
-        sd_bus_creds *creds;
-        const char *path;
-        const char *cmdline;
-};
-
-/*
-   Any time an access gets denied this callback will be called
-   with the audit data.  We then need to just copy the audit data into the msgbuf.
-*/
-static int audit_callback(
-                void *auditdata,
-                security_class_t cls,
-                char *msgbuf,
-                size_t msgbufsize) {
-
-        const struct audit_info *audit = auditdata;
-        uid_t uid = 0, login_uid = 0;
-        gid_t gid = 0;
-        char login_uid_buf[DECIMAL_STR_MAX(uid_t) + 1] = "n/a";
-        char uid_buf[DECIMAL_STR_MAX(uid_t) + 1] = "n/a";
-        char gid_buf[DECIMAL_STR_MAX(gid_t) + 1] = "n/a";
-
-        if (sd_bus_creds_get_audit_login_uid(audit->creds, &login_uid) >= 0)
-                xsprintf(login_uid_buf, UID_FMT, login_uid);
-        if (sd_bus_creds_get_euid(audit->creds, &uid) >= 0)
-                xsprintf(uid_buf, UID_FMT, uid);
-        if (sd_bus_creds_get_egid(audit->creds, &gid) >= 0)
-                xsprintf(gid_buf, GID_FMT, gid);
-
-        snprintf(msgbuf, msgbufsize,
-                 "auid=%s uid=%s gid=%s%s%s%s%s%s%s",
-                 login_uid_buf, uid_buf, gid_buf,
-                 audit->path ? " path=\"" : "", strempty(audit->path), audit->path ? "\"" : "",
-                 audit->cmdline ? " cmdline=\"" : "", strempty(audit->cmdline), audit->cmdline ? "\"" : "");
-
-        return 0;
-}
-
-static int callback_type_to_priority(int type) {
-        switch(type) {
-
-        case SELINUX_ERROR:
-                return LOG_ERR;
-
-        case SELINUX_WARNING:
-                return LOG_WARNING;
-
-        case SELINUX_INFO:
-                return LOG_INFO;
-
-        case SELINUX_AVC:
-        default:
-                return LOG_NOTICE;
-        }
-}
-
-/*
-   libselinux uses this callback when access gets denied or other
-   events happen. If audit is turned on, messages will be reported
-   using audit netlink, otherwise they will be logged using the usual
-   channels.
-
-   Code copied from dbus and modified.
-*/
-_printf_(2, 3) static int log_callback(int type, const char *fmt, ...) {
-        va_list ap;
-        const char *fmt2;
-
-#ifdef HAVE_AUDIT
-        int fd;
-
-        fd = get_audit_fd();
-
-        if (fd >= 0) {
-                _cleanup_free_ char *buf = NULL;
-                int r;
-
-                va_start(ap, fmt);
-                r = vasprintf(&buf, fmt, ap);
-                va_end(ap);
-
-                if (r >= 0) {
-                        audit_log_user_avc_message(fd, AUDIT_USER_AVC, buf, NULL, NULL, NULL, 0);
-                        return 0;
-                }
-        }
-#endif
-
-        fmt2 = strjoina("selinux: ", fmt);
-
-        va_start(ap, fmt);
-        log_internalv(LOG_AUTH | callback_type_to_priority(type), 0, __FILE__, __LINE__, __FUNCTION__, fmt2, ap);
-        va_end(ap);
-
-        return 0;
-}
-
-static int access_init(sd_bus_error *error) {
-
-        if (!mac_selinux_use())
-                return 0;
-
-        if (initialized)
-                return 1;
-
-        if (avc_open(NULL, 0) != 0) {
-                int enforce, saved_errno = errno;
-
-                enforce = security_getenforce();
-                log_full_errno(enforce != 0 ? LOG_ERR : LOG_WARNING, saved_errno, "Failed to open the SELinux AVC: %m");
-
-                /* If enforcement isn't on, then let's suppress this
-                 * error, and just don't do any AVC checks. The
-                 * warning we printed is hence all the admin will
-                 * see. */
-                if (enforce == 0)
-                        return 0;
-
-                /* Return an access denied error, if we couldn't load
-                 * the AVC but enforcing mode was on, or we couldn't
-                 * determine whether it is one. */
-                return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Failed to open the SELinux AVC: %s", strerror(saved_errno));
-        }
-
-        selinux_set_callback(SELINUX_CB_AUDIT, (union selinux_callback) audit_callback);
-        selinux_set_callback(SELINUX_CB_LOG, (union selinux_callback) log_callback);
-
-        initialized = true;
-        return 1;
-}
-
-/*
-   This function communicates with the kernel to check whether or not it should
-   allow the access.
-   If the machine is in permissive mode it will return ok.  Audit messages will
-   still be generated if the access would be denied in enforcing mode.
-*/
-int mac_selinux_generic_access_check(
-                sd_bus_message *message,
-                const char *path,
-                const char *permission,
-                sd_bus_error *error) {
-
-        _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
-        const char *tclass = NULL, *scon = NULL;
-        struct audit_info audit_info = {};
-        _cleanup_free_ char *cl = NULL;
-        security_context_t fcon = NULL;
-        char **cmdline = NULL;
-        int r = 0;
-
-        assert(message);
-        assert(permission);
-        assert(error);
-
-        r = access_init(error);
-        if (r <= 0)
-                return r;
-
-        r = sd_bus_query_sender_creds(
-                        message,
-                        SD_BUS_CREDS_PID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_EGID|
-                        SD_BUS_CREDS_CMDLINE|SD_BUS_CREDS_AUDIT_LOGIN_UID|
-                        SD_BUS_CREDS_SELINUX_CONTEXT|
-                        SD_BUS_CREDS_AUGMENT /* get more bits from /proc */,
-                        &creds);
-        if (r < 0)
-                goto finish;
-
-        /* The SELinux context is something we really should have
-         * gotten directly from the message or sender, and not be an
-         * augmented field. If it was augmented we cannot use it for
-         * authorization, since this is racy and vulnerable. Let's add
-         * an extra check, just in case, even though this really
-         * shouldn't be possible. */
-        assert_return((sd_bus_creds_get_augmented_mask(creds) & SD_BUS_CREDS_SELINUX_CONTEXT) == 0, -EPERM);
-
-        r = sd_bus_creds_get_selinux_context(creds, &scon);
-        if (r < 0)
-                goto finish;
-
-        if (path) {
-                /* Get the file context of the unit file */
-
-                r = getfilecon_raw(path, &fcon);
-                if (r < 0) {
-                        r = sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Failed to get file context on %s.", path);
-                        goto finish;
-                }
-
-                tclass = "service";
-        } else {
-                r = getcon_raw(&fcon);
-                if (r < 0) {
-                        r = sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Failed to get current context.");
-                        goto finish;
-                }
-
-                tclass = "system";
-        }
-
-        sd_bus_creds_get_cmdline(creds, &cmdline);
-        cl = strv_join(cmdline, " ");
-
-        audit_info.creds = creds;
-        audit_info.path = path;
-        audit_info.cmdline = cl;
-
-        r = selinux_check_access(scon, fcon, tclass, permission, &audit_info);
-        if (r < 0)
-                r = sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "SELinux policy denies access.");
-
-        log_debug("SELinux access check scon=%s tcon=%s tclass=%s perm=%s path=%s cmdline=%s: %i", scon, fcon, tclass, permission, path, cl, r);
-
-finish:
-        freecon(fcon);
-
-        if (r < 0 && security_getenforce() != 1) {
-                sd_bus_error_free(error);
-                r = 0;
-        }
-
-        return r;
-}
-
-#else
-
-int mac_selinux_generic_access_check(
-                sd_bus_message *message,
-                const char *path,
-                const char *permission,
-                sd_bus_error *error) {
-
-        return 0;
-}
-
-#endif