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Systemd/src/test/test-condition.c
Felipe Sateler 708d423915 test-condition: don't assume that all non-root users are normal users (#6409) 
Automated builders may run under a dedicated system user, and this test would fail that

Fixes #6366
2017-07-19 20:48:23 -04:00

493 lines
17 KiB
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/***
This file is part of systemd
Copyright 2014 Ronny Chevalier
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 <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include "sd-id128.h"
#include "alloc-util.h"
#include "apparmor-util.h"
#include "architecture.h"
#include "audit-util.h"
#include "condition.h"
#include "hostname-util.h"
#include "id128-util.h"
#include "ima-util.h"
#include "log.h"
#include "macro.h"
#include "selinux-util.h"
#include "smack-util.h"
#include "strv.h"
#include "virt.h"
#include "util.h"
#include "user-util.h"
static void test_condition_test_path(void) {
Condition *condition;
condition = condition_new(CONDITION_PATH_EXISTS, "/bin/sh", false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_PATH_EXISTS, "/bin/s?", false, false);
assert_se(condition);
assert_se(!condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_PATH_EXISTS_GLOB, "/bin/s?", false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_PATH_EXISTS_GLOB, "/bin/s?", false, true);
assert_se(condition);
assert_se(!condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_PATH_EXISTS, "/thiscertainlywontexist", false, false);
assert_se(condition);
assert_se(!condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_PATH_EXISTS, "/thiscertainlywontexist", false, true);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_PATH_IS_DIRECTORY, "/bin", false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_DIRECTORY_NOT_EMPTY, "/bin", false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_FILE_NOT_EMPTY, "/bin/sh", false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_FILE_IS_EXECUTABLE, "/bin/sh", false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_FILE_IS_EXECUTABLE, "/etc/passwd", false, false);
assert_se(condition);
assert_se(!condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_PATH_IS_MOUNT_POINT, "/proc", false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_PATH_IS_MOUNT_POINT, "/", false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_PATH_IS_MOUNT_POINT, "/bin", false, false);
assert_se(condition);
assert_se(!condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_PATH_IS_READ_WRITE, "/tmp", false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_PATH_IS_SYMBOLIC_LINK, "/dev/stdout", false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
}
static void test_condition_test_ac_power(void) {
Condition *condition;
condition = condition_new(CONDITION_AC_POWER, "true", false, false);
assert_se(condition);
assert_se(condition_test(condition) == on_ac_power());
condition_free(condition);
condition = condition_new(CONDITION_AC_POWER, "false", false, false);
assert_se(condition);
assert_se(condition_test(condition) != on_ac_power());
condition_free(condition);
condition = condition_new(CONDITION_AC_POWER, "false", false, true);
assert_se(condition);
assert_se(condition_test(condition) == on_ac_power());
condition_free(condition);
}
static void test_condition_test_host(void) {
_cleanup_free_ char *hostname = NULL;
char sid[SD_ID128_STRING_MAX];
Condition *condition;
sd_id128_t id;
int r;
r = sd_id128_get_machine(&id);
assert_se(r >= 0);
assert_se(sd_id128_to_string(id, sid));
condition = condition_new(CONDITION_HOST, sid, false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_HOST, "garbage value jjjjjjjjjjjjjj", false, false);
assert_se(condition);
assert_se(!condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_HOST, sid, false, true);
assert_se(condition);
assert_se(!condition_test(condition));
condition_free(condition);
hostname = gethostname_malloc();
assert_se(hostname);
/* if hostname looks like an id128 then skip testing it */
if (id128_is_valid(hostname))
log_notice("hostname is an id128, skipping test");
else {
condition = condition_new(CONDITION_HOST, hostname, false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
}
}
static void test_condition_test_architecture(void) {
Condition *condition;
const char *sa;
int a;
a = uname_architecture();
assert_se(a >= 0);
sa = architecture_to_string(a);
assert_se(sa);
condition = condition_new(CONDITION_ARCHITECTURE, sa, false, false);
assert_se(condition);
assert_se(condition_test(condition) > 0);
condition_free(condition);
condition = condition_new(CONDITION_ARCHITECTURE, "garbage value", false, false);
assert_se(condition);
assert_se(condition_test(condition) == 0);
condition_free(condition);
condition = condition_new(CONDITION_ARCHITECTURE, sa, false, true);
assert_se(condition);
assert_se(condition_test(condition) == 0);
condition_free(condition);
}
static void test_condition_test_kernel_command_line(void) {
Condition *condition;
condition = condition_new(CONDITION_KERNEL_COMMAND_LINE, "thisreallyshouldntbeonthekernelcommandline", false, false);
assert_se(condition);
assert_se(!condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_KERNEL_COMMAND_LINE, "andthis=neither", false, false);
assert_se(condition);
assert_se(!condition_test(condition));
condition_free(condition);
}
static void test_condition_test_null(void) {
Condition *condition;
condition = condition_new(CONDITION_NULL, NULL, false, false);
assert_se(condition);
assert_se(condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_NULL, NULL, false, true);
assert_se(condition);
assert_se(!condition_test(condition));
condition_free(condition);
}
static void test_condition_test_security(void) {
Condition *condition;
condition = condition_new(CONDITION_SECURITY, "garbage oifdsjfoidsjoj", false, false);
assert_se(condition);
assert_se(!condition_test(condition));
condition_free(condition);
condition = condition_new(CONDITION_SECURITY, "selinux", false, true);
assert_se(condition);
assert_se(condition_test(condition) != mac_selinux_use());
condition_free(condition);
condition = condition_new(CONDITION_SECURITY, "ima", false, false);
assert_se(condition);
assert_se(condition_test(condition) == use_ima());
condition_free(condition);
condition = condition_new(CONDITION_SECURITY, "apparmor", false, false);
assert_se(condition);
assert_se(condition_test(condition) == mac_apparmor_use());
condition_free(condition);
condition = condition_new(CONDITION_SECURITY, "smack", false, false);
assert_se(condition);
assert_se(condition_test(condition) == mac_smack_use());
condition_free(condition);
condition = condition_new(CONDITION_SECURITY, "audit", false, false);
assert_se(condition);
assert_se(condition_test(condition) == use_audit());
condition_free(condition);
}
static void test_condition_test_virtualization(void) {
Condition *condition;
const char *virt;
int r;
condition = condition_new(CONDITION_VIRTUALIZATION, "garbage oifdsjfoidsjoj", false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionVirtualization=garbage → %i", r);
assert_se(r == 0);
condition_free(condition);
condition = condition_new(CONDITION_VIRTUALIZATION, "container", false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionVirtualization=container → %i", r);
assert_se(r == !!detect_container());
condition_free(condition);
condition = condition_new(CONDITION_VIRTUALIZATION, "vm", false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionVirtualization=vm → %i", r);
assert_se(r == (detect_vm() && !detect_container()));
condition_free(condition);
condition = condition_new(CONDITION_VIRTUALIZATION, "private-users", false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionVirtualization=private-users → %i", r);
assert_se(r == !!running_in_userns());
condition_free(condition);
NULSTR_FOREACH(virt,
"kvm\0"
"qemu\0"
"bochs\0"
"xen\0"
"uml\0"
"vmware\0"
"oracle\0"
"microsoft\0"
"zvm\0"
"parallels\0"
"bhyve\0"
"vm_other\0") {
condition = condition_new(CONDITION_VIRTUALIZATION, virt, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionVirtualization=%s → %i", virt, r);
assert_se(r >= 0);
condition_free(condition);
}
}
static void test_condition_test_user(void) {
Condition *condition;
char* uid;
char* username;
int r;
condition = condition_new(CONDITION_USER, "garbage oifdsjfoidsjoj", false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionUser=garbage → %i", r);
assert_se(r == 0);
condition_free(condition);
assert_se(asprintf(&uid, "%"PRIu32, UINT32_C(0xFFFF)) > 0);
condition = condition_new(CONDITION_USER, uid, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionUser=%s → %i", uid, r);
assert_se(r == 0);
condition_free(condition);
free(uid);
assert_se(asprintf(&uid, "%u", (unsigned)getuid()) > 0);
condition = condition_new(CONDITION_USER, uid, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionUser=%s → %i", uid, r);
assert_se(r > 0);
condition_free(condition);
free(uid);
assert_se(asprintf(&uid, "%u", (unsigned)getuid()+1) > 0);
condition = condition_new(CONDITION_USER, uid, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionUser=%s → %i", uid, r);
assert_se(r == 0);
condition_free(condition);
free(uid);
username = getusername_malloc();
assert_se(username);
condition = condition_new(CONDITION_USER, username, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionUser=%s → %i", username, r);
assert_se(r > 0);
condition_free(condition);
free(username);
username = (char*)(geteuid() == 0 ? NOBODY_USER_NAME : "root");
condition = condition_new(CONDITION_USER, username, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionUser=%s → %i", username, r);
assert_se(r == 0);
condition_free(condition);
condition = condition_new(CONDITION_USER, "@system", false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionUser=@system → %i", r);
if (getuid() < SYSTEM_UID_MAX || geteuid() < SYSTEM_UID_MAX)
assert_se(r > 0);
else
assert_se(r == 0);
condition_free(condition);
}
static void test_condition_test_group(void) {
Condition *condition;
char* gid;
char* groupname;
gid_t *gids, max_gid;
int ngroups_max, r, i;
assert_se(0 < asprintf(&gid, "%u", UINT32_C(0xFFFF)));
condition = condition_new(CONDITION_GROUP, gid, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionGroup=%s → %i", gid, r);
assert_se(r == 0);
condition_free(condition);
free(gid);
assert_se(0 < asprintf(&gid, "%u", getgid()));
condition = condition_new(CONDITION_GROUP, gid, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionGroup=%s → %i", gid, r);
assert_se(r > 0);
condition_free(condition);
free(gid);
ngroups_max = sysconf(_SC_NGROUPS_MAX);
assert(ngroups_max > 0);
gids = alloca(sizeof(gid_t) * ngroups_max);
r = getgroups(ngroups_max, gids);
assert(r >= 0);
max_gid = getgid();
for (i = 0; i < r; i++) {
assert_se(0 < asprintf(&gid, "%u", gids[i]));
condition = condition_new(CONDITION_GROUP, gid, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionGroup=%s → %i", gid, r);
assert_se(r > 0);
condition_free(condition);
free(gid);
max_gid = gids[i] > max_gid ? gids[i] : max_gid;
groupname = gid_to_name(gids[i]);
assert_se(groupname);
condition = condition_new(CONDITION_GROUP, groupname, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionGroup=%s → %i", groupname, r);
assert_se(r > 0);
condition_free(condition);
free(groupname);
max_gid = gids[i] > max_gid ? gids[i] : max_gid;
}
assert_se(0 < asprintf(&gid, "%u", max_gid+1));
condition = condition_new(CONDITION_GROUP, gid, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionGroup=%s → %i", gid, r);
assert_se(r == 0);
condition_free(condition);
free(gid);
groupname = (char*)(geteuid() == 0 ? NOBODY_GROUP_NAME : "root");
condition = condition_new(CONDITION_GROUP, groupname, false, false);
assert_se(condition);
r = condition_test(condition);
log_info("ConditionGroup=%s → %i", groupname, r);
assert_se(r == 0);
condition_free(condition);
}
int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
log_parse_environment();
log_open();
test_condition_test_path();
test_condition_test_ac_power();
test_condition_test_host();
test_condition_test_architecture();
test_condition_test_kernel_command_line();
test_condition_test_null();
test_condition_test_security();
test_condition_test_virtualization();
test_condition_test_user();
test_condition_test_group();
return 0;
}
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