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 "authz/pamacct.h"
  24
  25#include <security/pam_appl.h>
  26
  27static bool failauth;
  28
  29/*
  30 * These two functions are exported by libpam.so.
  31 *
  32 * By defining them again here, our impls are resolved
  33 * by the linker instead of those in libpam.so
  34 *
  35 * The test suite is thus isolated from the host system
  36 * PAM setup, so we can do predictable test scenarios
  37 */
  38int
  39pam_start(const char *service_name, const char *user,
  40          const struct pam_conv *pam_conversation,
  41          pam_handle_t **pamh)
  42{
  43    failauth = true;
  44    if (!g_str_equal(service_name, "qemu-vnc")) {
  45        return PAM_AUTH_ERR;
  46    }
  47
  48    if (g_str_equal(user, "fred")) {
  49        failauth = false;
  50    }
  51
  52    return PAM_SUCCESS;
  53}
  54
  55
  56int
  57pam_acct_mgmt(pam_handle_t *pamh, int flags)
  58{
  59    if (failauth) {
  60        return PAM_AUTH_ERR;
  61    }
  62
  63    return PAM_SUCCESS;
  64}
  65
  66
  67static void test_authz_unknown_service(void)
  68{
  69    Error *local_err = NULL;
  70    QAuthZPAM *auth = qauthz_pam_new("auth0",
  71                                     "qemu-does-not-exist",
  72                                     &error_abort);
  73
  74    g_assert_nonnull(auth);
  75
  76    g_assert_false(qauthz_is_allowed(QAUTHZ(auth), "fred", &local_err));
  77
  78    error_free_or_abort(&local_err);
  79    object_unparent(OBJECT(auth));
  80}
  81
  82
  83static void test_authz_good_user(void)
  84{
  85    QAuthZPAM *auth = qauthz_pam_new("auth0",
  86                                     "qemu-vnc",
  87                                     &error_abort);
  88
  89    g_assert_nonnull(auth);
  90
  91    g_assert_true(qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
  92
  93    object_unparent(OBJECT(auth));
  94}
  95
  96
  97static void test_authz_bad_user(void)
  98{
  99    Error *local_err = NULL;
 100    QAuthZPAM *auth = qauthz_pam_new("auth0",
 101                                     "qemu-vnc",
 102                                     &error_abort);
 103
 104    g_assert_nonnull(auth);
 105
 106    g_assert_false(qauthz_is_allowed(QAUTHZ(auth), "bob", &local_err));
 107
 108    error_free_or_abort(&local_err);
 109    object_unparent(OBJECT(auth));
 110}
 111
 112
 113int main(int argc, char **argv)
 114{
 115    g_test_init(&argc, &argv, NULL);
 116
 117    module_call_init(MODULE_INIT_QOM);
 118
 119    g_test_add_func("/auth/pam/unknown-service", test_authz_unknown_service);
 120    g_test_add_func("/auth/pam/good-user", test_authz_good_user);
 121    g_test_add_func("/auth/pam/bad-user", test_authz_bad_user);
 122
 123    return g_test_run();
 124}
 125