LXR qemu/tests/test-authz-pam.c

   1/*
   2 * QEMU PAM authorization object tests
   3 *
   4 * Copyright (c) 2018 Red Hat, Inc.
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License as published by the Free Software Foundation; either
   9 * version 2 of the License, or (at your option) any later version.
  10 *
  11 * This library is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * Lesser General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU Lesser General Public
  17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18 *
  19 */
  20
  21#include "qemu/osdep.h"
  22#include "qapi/error.h"
  23#include "qemu/module.h"
  24#include "authz/pamacct.h"
  25
  26#include <security/pam_appl.h>
  27
  28static bool failauth;
  29
  30/*
  31 * These two functions are exported by libpam.so.
  32 *
  33 * By defining them again here, our impls are resolved
  34 * by the linker instead of those in libpam.so
  35 *
  36 * The test suite is thus isolated from the host system
  37 * PAM setup, so we can do predictable test scenarios
  38 */
  39int
  40pam_start(const char *service_name, const char *user,
  41          const struct pam_conv *pam_conversation,
  42          pam_handle_t **pamh)
  43{
  44    failauth = true;
  45    if (!g_str_equal(service_name, "qemu-vnc")) {
  46        return PAM_AUTH_ERR;
  47    }
  48
  49    if (g_str_equal(user, "fred")) {
  50        failauth = false;
  51    }
  52
  53    return PAM_SUCCESS;
  54}
  55
  56
  57int
  58pam_acct_mgmt(pam_handle_t *pamh, int flags)
  59{
  60    if (failauth) {
  61        return PAM_AUTH_ERR;
  62    }
  63
  64    return PAM_SUCCESS;
  65}
  66
  67
  68static void test_authz_unknown_service(void)
  69{
  70    Error *local_err = NULL;
  71    QAuthZPAM *auth = qauthz_pam_new("auth0",
  72                                     "qemu-does-not-exist",
  73                                     &error_abort);
  74
  75    g_assert_nonnull(auth);
  76
  77    g_assert_false(qauthz_is_allowed(QAUTHZ(auth), "fred", &local_err));
  78
  79    error_free_or_abort(&local_err);
  80    object_unparent(OBJECT(auth));
  81}
  82
  83
  84static void test_authz_good_user(void)
  85{
  86    QAuthZPAM *auth = qauthz_pam_new("auth0",
  87                                     "qemu-vnc",
  88                                     &error_abort);
  89
  90    g_assert_nonnull(auth);
  91
  92    g_assert_true(qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
  93
  94    object_unparent(OBJECT(auth));
  95}
  96
  97
  98static void test_authz_bad_user(void)
  99{
 100    Error *local_err = NULL;
 101    QAuthZPAM *auth = qauthz_pam_new("auth0",
 102                                     "qemu-vnc",
 103                                     &error_abort);
 104
 105    g_assert_nonnull(auth);
 106
 107    g_assert_false(qauthz_is_allowed(QAUTHZ(auth), "bob", &local_err));
 108
 109    error_free_or_abort(&local_err);
 110    object_unparent(OBJECT(auth));
 111}
 112
 113
 114int main(int argc, char **argv)
 115{
 116    g_test_init(&argc, &argv, NULL);
 117
 118    module_call_init(MODULE_INIT_QOM);
 119
 120    g_test_add_func("/auth/pam/unknown-service", test_authz_unknown_service);
 121    g_test_add_func("/auth/pam/good-user", test_authz_good_user);
 122    g_test_add_func("/auth/pam/bad-user", test_authz_bad_user);
 123
 124    return g_test_run();
 125}
 126