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 2.1 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
  28 static bool failauth;
  29
  30 /*
  31  * These three 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  */
  39 int
  40 pam_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     *pamh = (pam_handle_t *)0xbadeaffe;
  54     return PAM_SUCCESS;
  55 }
  56
  57
  58 int
  59 pam_acct_mgmt(pam_handle_t *pamh, int flags)
  60 {
  61     if (failauth) {
  62         return PAM_AUTH_ERR;
  63     }
  64
  65     return PAM_SUCCESS;
  66 }
  67
  68
  69 int
  70 pam_end(pam_handle_t *pamh, int status)
  71 {
  72     return PAM_SUCCESS;
  73 }
  74
  75
  76 static void test_authz_unknown_service(void)
  77 {
  78     Error *local_err = NULL;
  79     QAuthZPAM *auth = qauthz_pam_new("auth0",
  80                                      "qemu-does-not-exist",
  81                                      &error_abort);
  82
  83     g_assert_nonnull(auth);
  84
  85     g_assert_false(qauthz_is_allowed(QAUTHZ(auth), "fred", &local_err));
  86
  87     error_free_or_abort(&local_err);
  88     object_unparent(OBJECT(auth));
  89 }
  90
  91
  92 static void test_authz_good_user(void)
  93 {
  94     QAuthZPAM *auth = qauthz_pam_new("auth0",
  95                                      "qemu-vnc",
  96                                      &error_abort);
  97
  98     g_assert_nonnull(auth);
  99
 100     g_assert_true(qauthz_is_allowed(QAUTHZ(auth), "fred", &error_abort));
 101
 102     object_unparent(OBJECT(auth));
 103 }
 104
 105
 106 static void test_authz_bad_user(void)
 107 {
 108     Error *local_err = NULL;
 109     QAuthZPAM *auth = qauthz_pam_new("auth0",
 110                                      "qemu-vnc",
 111                                      &error_abort);
 112
 113     g_assert_nonnull(auth);
 114
 115     g_assert_false(qauthz_is_allowed(QAUTHZ(auth), "bob", &local_err));
 116
 117     error_free_or_abort(&local_err);
 118     object_unparent(OBJECT(auth));
 119 }
 120
 121
 122 int main(int argc, char **argv)
 123 {
 124     g_test_init(&argc, &argv, NULL);
 125
 126     module_call_init(MODULE_INIT_QOM);
 127
 128     g_test_add_func("/auth/pam/unknown-service", test_authz_unknown_service);
 129     g_test_add_func("/auth/pam/good-user", test_authz_good_user);
 130     g_test_add_func("/auth/pam/bad-user", test_authz_bad_user);
 131
 132     return g_test_run();
 133 }