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libvirt/tests/securityselinuxlabeltest.c
Jonathon Jongsma b964735609 qemu: Set capabilities properly for tests 
Several tests were not specifying the necessary qemu capabilities for
what they were testing. Due to the way that the video devices are
currently validated, this is not causing any problems. But a change to
video device validation in a following patch would have exposed this
issue and resulted in multiple test failures about the domain
configuration not supporting particular video models.

Reviewed-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
2019-11-14 11:37:50 -05:00

375 lines
9.5 KiB
C
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/*
* Copyright (C) 2011-2014 Red Hat, Inc.
*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* License along with this library; If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include <config.h>
#include <time.h>
#include <selinux/selinux.h>
#include <selinux/context.h>
#include <sys/xattr.h>
#include "internal.h"
#include "testutils.h"
#include "testutilsqemu.h"
#include "qemu/qemu_domain.h"
#include "viralloc.h"
#include "virerror.h"
#include "virfile.h"
#include "virlog.h"
#include "security/security_manager.h"
#include "virstring.h"
#define VIR_FROM_THIS VIR_FROM_NONE
VIR_LOG_INIT("tests.securityselinuxlabeltest");
static virQEMUDriver driver;
static virSecurityManagerPtr mgr;
typedef struct testSELinuxFile testSELinuxFile;
struct testSELinuxFile {
char *file;
char *context;
};
static int
testUserXattrEnabled(void)
{
int ret = -1;
ssize_t len;
const char *con_value = "system_u:object_r:svirt_image_t:s0:c41,c264";
char *path = NULL;
path = g_strdup_printf("%s/securityselinuxlabeldata/testxattr", abs_builddir);
if (virFileMakePath(abs_builddir "/securityselinuxlabeldata") < 0 ||
virFileTouch(path, 0600) < 0)
goto cleanup;
len = setxattr(path, "user.libvirt.selinux", con_value,
strlen(con_value), 0);
if (len < 0) {
if (errno == EOPNOTSUPP)
ret = 0;
goto cleanup;
}
ret = 1;
cleanup:
unlink(path);
rmdir(abs_builddir "/securityselinuxlabeldata");
VIR_FREE(path);
return ret;
}
static int
testSELinuxMungePath(char **path)
{
char *tmp;
tmp = g_strdup_printf("%s/securityselinuxlabeldata%s", abs_builddir, *path);
VIR_FREE(*path);
*path = tmp;
return 0;
}
static int
testSELinuxLoadFileList(const char *testname,
testSELinuxFile **files,
size_t *nfiles)
{
int ret = -1;
char *path = NULL;
FILE *fp = NULL;
char *line = NULL;
*files = NULL;
*nfiles = 0;
path = g_strdup_printf("%s/securityselinuxlabeldata/%s.txt", abs_srcdir,
testname);
if (!(fp = fopen(path, "r")))
goto cleanup;
if (VIR_ALLOC_N(line, 1024) < 0)
goto cleanup;
while (!feof(fp)) {
char *file = NULL, *context = NULL, *tmp;
if (!fgets(line, 1024, fp)) {
if (!feof(fp))
goto cleanup;
break;
}
tmp = strchr(line, ';');
if (!tmp) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"unexpected format for line '%s'",
line);
goto cleanup;
}
*tmp = '\0';
tmp++;
file = g_strdup_printf("%s/securityselinuxlabeldata%s", abs_builddir,
line);
if (*tmp != '\0' && *tmp != '\n') {
context = g_strdup(tmp);
tmp = strchr(context, '\n');
if (tmp)
*tmp = '\0';
}
if (VIR_EXPAND_N(*files, *nfiles, 1) < 0) {
VIR_FREE(file);
VIR_FREE(context);
goto cleanup;
}
(*files)[(*nfiles)-1].file = file;
(*files)[(*nfiles)-1].context = context;
}
ret = 0;
cleanup:
VIR_FORCE_FCLOSE(fp);
VIR_FREE(path);
VIR_FREE(line);
return ret;
}
static virDomainDefPtr
testSELinuxLoadDef(const char *testname)
{
char *xmlfile = NULL;
virDomainDefPtr def = NULL;
size_t i;
xmlfile = g_strdup_printf("%s/securityselinuxlabeldata/%s.xml", abs_srcdir,
testname);
if (!(def = virDomainDefParseFile(xmlfile, driver.caps, driver.xmlopt,
NULL, 0)))
goto cleanup;
for (i = 0; i < def->ndisks; i++) {
if (def->disks[i]->src->type != VIR_STORAGE_TYPE_FILE &&
def->disks[i]->src->type != VIR_STORAGE_TYPE_BLOCK)
continue;
if (testSELinuxMungePath(&def->disks[i]->src->path) < 0)
goto cleanup;
}
for (i = 0; i < def->nserials; i++) {
if (def->serials[i]->source->type != VIR_DOMAIN_CHR_TYPE_FILE &&
def->serials[i]->source->type != VIR_DOMAIN_CHR_TYPE_PIPE &&
def->serials[i]->source->type != VIR_DOMAIN_CHR_TYPE_DEV &&
def->serials[i]->source->type != VIR_DOMAIN_CHR_TYPE_UNIX)
continue;
if (def->serials[i]->source->type == VIR_DOMAIN_CHR_TYPE_UNIX) {
if (testSELinuxMungePath(&def->serials[i]->source->data.nix.path) < 0)
goto cleanup;
} else {
if (testSELinuxMungePath(&def->serials[i]->source->data.file.path) < 0)
goto cleanup;
}
}
if (def->os.kernel &&
testSELinuxMungePath(&def->os.kernel) < 0)
goto cleanup;
if (def->os.initrd &&
testSELinuxMungePath(&def->os.initrd) < 0)
goto cleanup;
cleanup:
VIR_FREE(xmlfile);
return def;
}
static int
testSELinuxCreateDisks(testSELinuxFile *files, size_t nfiles)
{
size_t i;
if (virFileMakePath(abs_builddir "/securityselinuxlabeldata/nfs") < 0)
return -1;
for (i = 0; i < nfiles; i++) {
if (virFileTouch(files[i].file, 0600) < 0)
return -1;
}
return 0;
}
static int
testSELinuxDeleteDisks(testSELinuxFile *files, size_t nfiles)
{
size_t i;
for (i = 0; i < nfiles; i++) {
if (unlink(files[i].file) < 0)
return -1;
}
if (rmdir(abs_builddir "/securityselinuxlabeldata/nfs") < 0)
return -1;
/* Ignore failure to remove non-empty directory with in-tree build */
rmdir(abs_builddir "/securityselinuxlabeldata");
return 0;
}
static int
testSELinuxCheckLabels(testSELinuxFile *files, size_t nfiles)
{
size_t i;
security_context_t ctx;
for (i = 0; i < nfiles; i++) {
ctx = NULL;
if (getfilecon(files[i].file, &ctx) < 0) {
if (errno == ENODATA) {
/* nothing to do */
} else if (errno == EOPNOTSUPP) {
ctx = g_strdup("EOPNOTSUPP");
} else {
virReportSystemError(errno,
"Cannot read label on %s",
files[i].file);
return -1;
}
}
if (STRNEQ_NULLABLE(files[i].context, ctx)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"File %s context '%s' did not match expected '%s'",
files[i].file, ctx, files[i].context);
VIR_FREE(ctx);
return -1;
}
VIR_FREE(ctx);
}
return 0;
}
static int
testSELinuxLabeling(const void *opaque)
{
const char *testname = opaque;
int ret = -1;
testSELinuxFile *files = NULL;
size_t nfiles = 0;
size_t i;
virDomainDefPtr def = NULL;
if (testSELinuxLoadFileList(testname, &files, &nfiles) < 0)
goto cleanup;
if (testSELinuxCreateDisks(files, nfiles) < 0)
goto cleanup;
if (!(def = testSELinuxLoadDef(testname)))
goto cleanup;
if (virSecurityManagerSetAllLabel(mgr, def, NULL, false, false) < 0)
goto cleanup;
if (testSELinuxCheckLabels(files, nfiles) < 0)
goto cleanup;
ret = 0;
cleanup:
if (testSELinuxDeleteDisks(files, nfiles) < 0)
VIR_WARN("unable to fully clean up");
virDomainDefFree(def);
for (i = 0; i < nfiles; i++) {
VIR_FREE(files[i].file);
VIR_FREE(files[i].context);
}
VIR_FREE(files);
if (ret < 0)
VIR_TEST_VERBOSE("%s", virGetLastErrorMessage());
return ret;
}
static int
mymain(void)
{
int ret = 0;
int rc = testUserXattrEnabled();
g_autoptr(virQEMUCaps) qemuCaps = NULL;
if (rc < 0)
return EXIT_FAILURE;
if (!rc)
return EXIT_AM_SKIP;
if (!(mgr = virSecurityManagerNew("selinux", "QEMU",
VIR_SECURITY_MANAGER_DEFAULT_CONFINED |
VIR_SECURITY_MANAGER_PRIVILEGED))) {
VIR_TEST_VERBOSE("Unable to initialize security driver: %s",
virGetLastErrorMessage());
return EXIT_FAILURE;
}
if (qemuTestDriverInit(&driver) < 0)
return EXIT_FAILURE;
if (!(qemuCaps = virQEMUCapsNew()))
return EXIT_FAILURE;
virQEMUCapsSet(qemuCaps, QEMU_CAPS_DEVICE_CIRRUS_VGA);
if (qemuTestCapsCacheInsert(driver.qemuCapsCache, qemuCaps) < 0)
return EXIT_FAILURE;
#define DO_TEST_LABELING(name) \
if (virTestRun("Labelling " # name, testSELinuxLabeling, name) < 0) \
ret = -1;
setcon((security_context_t)"system_r:system_u:libvirtd_t:s0:c0.c1023");
DO_TEST_LABELING("disks");
DO_TEST_LABELING("kernel");
DO_TEST_LABELING("chardev");
DO_TEST_LABELING("nfs");
qemuTestDriverFree(&driver);
return (ret == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}
VIR_TEST_MAIN_PRELOAD(mymain, abs_builddir "/.libs/libsecurityselinuxhelper.so")
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