libcli/auth/tests/ntlm_check.c

   1 /*
   2  * Unit tests for the ntlm_check password hash check library.
   3  *
   4  *  Copyright (C) Andrew Bartlett <abartlet@samba.org> 2018
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program 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
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 /*
  22  * from cmocka.c:
  23  * These headers or their equivalents should be included prior to
  24  * including
  25  * this header file.
  26  *
  27  * #include <stdarg.h>
  28  * #include <stddef.h>
  29  * #include <setjmp.h>
  30  *
  31  * This allows test applications to use custom definitions of C standard
  32  * library functions and types.
  33  *
  34  */
  35
  36 /*
  37  * Note that the messaging routines (audit_message_send and get_event_server)
  38  * are not tested by these unit tests.  Currently they are for integration
  39  * test support, and as such are exercised by the integration tests.
  40  */
  41 #include <stdarg.h>
  42 #include <stddef.h>
  43 #include <setjmp.h>
  44 #include <cmocka.h>
  45
  46 #include "includes.h"
  47 #include "../lib/crypto/crypto.h"
  48 #include "librpc/gen_ndr/netlogon.h"
  49 #include "libcli/auth/libcli_auth.h"
  50 #include "auth/credentials/credentials.h"
  51
  52 struct ntlm_state {
  53         const char *username;
  54         const char *domain;
  55         DATA_BLOB challenge;
  56         DATA_BLOB ntlm;
  57         DATA_BLOB lm;
  58         DATA_BLOB ntlm_key;
  59         DATA_BLOB lm_key;
  60         const struct samr_Password *nt_hash;
  61 };
  62
  63 static int test_ntlm_setup_with_options(void **state,
  64                                         int flags, bool upn)
  65 {
  66         NTSTATUS status;
  67         DATA_BLOB challenge = {
  68                 .data = discard_const_p(uint8_t, "I am a teapot"),
  69                 .length = 8
  70         };
  71         struct ntlm_state *ntlm_state = talloc(NULL, struct ntlm_state);
  72         DATA_BLOB target_info = NTLMv2_generate_names_blob(ntlm_state,
  73                                                            NULL,
  74                                                            "serverdom");
  75         struct cli_credentials *creds = cli_credentials_init(ntlm_state);
  76         cli_credentials_set_username(creds,
  77                                      "testuser",
  78                                      CRED_SPECIFIED);
  79         cli_credentials_set_domain(creds,
  80                                    "testdom",
  81                                    CRED_SPECIFIED);
  82         cli_credentials_set_workstation(creds,
  83                                         "testwksta",
  84                                         CRED_SPECIFIED);
  85         cli_credentials_set_password(creds,
  86                                      "testpass",
  87                                      CRED_SPECIFIED);
  88
  89         if (upn) {
  90                 cli_credentials_set_principal(creds,
  91                                               "testuser@samba.org",
  92                                               CRED_SPECIFIED);
  93         }
  94
  95         cli_credentials_get_ntlm_username_domain(creds,
  96                                                  ntlm_state,
  97                                                  &ntlm_state->username,
  98                                                  &ntlm_state->domain);
  99
 100         status = cli_credentials_get_ntlm_response(creds,
 101                                                    ntlm_state,
 102                                                    &flags,
 103                                                    challenge,
 104                                                    NULL,
 105                                                    target_info,
 106                                                    &ntlm_state->lm,
 107                                                    &ntlm_state->ntlm,
 108                                                    &ntlm_state->lm_key,
 109                                                    &ntlm_state->ntlm_key);
 110         ntlm_state->challenge = challenge;
 111
 112         ntlm_state->nt_hash = cli_credentials_get_nt_hash(creds,
 113                                                           ntlm_state);
 114
 115         if (!NT_STATUS_IS_OK(status)) {
 116                 return -1;
 117         }
 118
 119         *state = ntlm_state;
 120         return 0;
 121 }
 122
 123 static int test_ntlm_setup(void **state) {
 124         return test_ntlm_setup_with_options(state, 0, false);
 125 }
 126
 127 static int test_ntlm_and_lm_setup(void **state) {
 128         return test_ntlm_setup_with_options(state,
 129                                             CLI_CRED_LANMAN_AUTH,
 130                                             false);
 131 }
 132
 133 static int test_ntlm2_setup(void **state) {
 134         return test_ntlm_setup_with_options(state,
 135                                             CLI_CRED_NTLM2,
 136                                             false);
 137 }
 138
 139 static int test_ntlmv2_setup(void **state) {
 140         return test_ntlm_setup_with_options(state,
 141                                             CLI_CRED_NTLMv2_AUTH,
 142                                             false);
 143 }
 144
 145 static int test_ntlm_teardown(void **state)
 146 {
 147         struct ntlm_state *ntlm_state
 148                 = talloc_get_type_abort(*state,
 149                                         struct ntlm_state);
 150         TALLOC_FREE(ntlm_state);
 151         *state = NULL;
 152         return 0;
 153 }
 154
 155 static void test_ntlm_allowed(void **state)
 156 {
 157         DATA_BLOB user_sess_key, lm_sess_key;
 158         struct ntlm_state *ntlm_state
 159                 = talloc_get_type_abort(*state,
 160                                         struct ntlm_state);
 161         NTSTATUS status;
 162         status = ntlm_password_check(ntlm_state,
 163                                      false,
 164                                      NTLM_AUTH_ON,
 165                                      0,
 166                                      &ntlm_state->challenge,
 167                                      &ntlm_state->lm,
 168                                      &ntlm_state->ntlm,
 169                                      ntlm_state->username,
 170                                      ntlm_state->username,
 171                                      ntlm_state->domain,
 172                                      NULL,
 173                                      ntlm_state->nt_hash,
 174                                      &user_sess_key,
 175                                      &lm_sess_key);
 176
 177         assert_int_equal(NT_STATUS_V(status), NT_STATUS_V(NT_STATUS_OK));
 178 }
 179
 180 static void test_ntlm_allowed_lm_supplied(void **state)
 181 {
 182         return test_ntlm_allowed(state);
 183 }
 184
 185 static void test_ntlm_disabled(void **state)
 186 {
 187         DATA_BLOB user_sess_key, lm_sess_key;
 188         struct ntlm_state *ntlm_state
 189                 = talloc_get_type_abort(*state,
 190                                         struct ntlm_state);
 191         NTSTATUS status;
 192         status = ntlm_password_check(ntlm_state,
 193                                      false,
 194                                      NTLM_AUTH_DISABLED,
 195                                      0,
 196                                      &ntlm_state->challenge,
 197                                      &ntlm_state->lm,
 198                                      &ntlm_state->ntlm,
 199                                      ntlm_state->username,
 200                                      ntlm_state->username,
 201                                      ntlm_state->domain,
 202                                      NULL,
 203                                      ntlm_state->nt_hash,
 204                                      &user_sess_key,
 205                                      &lm_sess_key);
 206
 207         assert_int_equal(NT_STATUS_V(status), NT_STATUS_V(NT_STATUS_NTLM_BLOCKED));
 208 }
 209
 210 static void test_ntlm2(void **state)
 211 {
 212         DATA_BLOB user_sess_key, lm_sess_key;
 213         struct ntlm_state *ntlm_state
 214                 = talloc_get_type_abort(*state,
 215                                         struct ntlm_state);
 216         NTSTATUS status;
 217         status = ntlm_password_check(ntlm_state,
 218                                      false,
 219                                      NTLM_AUTH_ON,
 220                                      0,
 221                                      &ntlm_state->challenge,
 222                                      &ntlm_state->lm,
 223                                      &ntlm_state->ntlm,
 224                                      ntlm_state->username,
 225                                      ntlm_state->username,
 226                                      ntlm_state->domain,
 227                                      NULL,
 228                                      ntlm_state->nt_hash,
 229                                      &user_sess_key,
 230                                      &lm_sess_key);
 231
 232         /*
 233          * NTLM2 session security (where the real challenge is the
 234          * MD5(challenge, client-challenge) (in the first 8 bytes of
 235          * the lm) isn't decoded by ntlm_password_check(), it must
 236          * first be converted back into normal NTLM by the NTLMSSP
 237          * layer
 238          */
 239         assert_int_equal(NT_STATUS_V(status),
 240                          NT_STATUS_V(NT_STATUS_WRONG_PASSWORD));
 241 }
 242
 243 static void test_ntlm_mschapv2_only_allowed(void **state)
 244 {
 245         DATA_BLOB user_sess_key, lm_sess_key;
 246         struct ntlm_state *ntlm_state
 247                 = talloc_get_type_abort(*state,
 248                                         struct ntlm_state);
 249         NTSTATUS status;
 250         status = ntlm_password_check(ntlm_state,
 251                                      false,
 252                                      NTLM_AUTH_MSCHAPv2_NTLMV2_ONLY,
 253                                      MSV1_0_ALLOW_MSVCHAPV2,
 254                                      &ntlm_state->challenge,
 255                                      &ntlm_state->lm,
 256                                      &ntlm_state->ntlm,
 257                                      ntlm_state->username,
 258                                      ntlm_state->username,
 259                                      ntlm_state->domain,
 260                                      NULL,
 261                                      ntlm_state->nt_hash,
 262                                      &user_sess_key,
 263                                      &lm_sess_key);
 264
 265         assert_int_equal(NT_STATUS_V(status), NT_STATUS_V(NT_STATUS_OK));
 266 }
 267
 268 static void test_ntlm_mschapv2_only_denied(void **state)
 269 {
 270         DATA_BLOB user_sess_key, lm_sess_key;
 271         struct ntlm_state *ntlm_state
 272                 = talloc_get_type_abort(*state,
 273                                         struct ntlm_state);
 274         NTSTATUS status;
 275         status = ntlm_password_check(ntlm_state,
 276                                      false,
 277                                      NTLM_AUTH_MSCHAPv2_NTLMV2_ONLY,
 278                                      0,
 279                                      &ntlm_state->challenge,
 280                                      &ntlm_state->lm,
 281                                      &ntlm_state->ntlm,
 282                                      ntlm_state->username,
 283                                      ntlm_state->username,
 284                                      ntlm_state->domain,
 285                                      NULL,
 286                                      ntlm_state->nt_hash,
 287                                      &user_sess_key,
 288                                      &lm_sess_key);
 289
 290         assert_int_equal(NT_STATUS_V(status),
 291                          NT_STATUS_V(NT_STATUS_WRONG_PASSWORD));
 292 }
 293
 294 static void test_ntlmv2_only_ntlmv2(void **state)
 295 {
 296         DATA_BLOB user_sess_key, lm_sess_key;
 297         struct ntlm_state *ntlm_state
 298                 = talloc_get_type_abort(*state,
 299                                         struct ntlm_state);
 300         NTSTATUS status;
 301         status = ntlm_password_check(ntlm_state,
 302                                      false,
 303                                      NTLM_AUTH_NTLMV2_ONLY,
 304                                      0,
 305                                      &ntlm_state->challenge,
 306                                      &ntlm_state->lm,
 307                                      &ntlm_state->ntlm,
 308                                      ntlm_state->username,
 309                                      ntlm_state->username,
 310                                      ntlm_state->domain,
 311                                      NULL,
 312                                      ntlm_state->nt_hash,
 313                                      &user_sess_key,
 314                                      &lm_sess_key);
 315
 316         assert_int_equal(NT_STATUS_V(status), NT_STATUS_V(NT_STATUS_OK));
 317 }
 318
 319 static void test_ntlmv2_only_ntlm(void **state)
 320 {
 321         DATA_BLOB user_sess_key, lm_sess_key;
 322         struct ntlm_state *ntlm_state
 323                 = talloc_get_type_abort(*state,
 324                                         struct ntlm_state);
 325         NTSTATUS status;
 326         status = ntlm_password_check(ntlm_state,
 327                                      false,
 328                                      NTLM_AUTH_NTLMV2_ONLY,
 329                                      0,
 330                                      &ntlm_state->challenge,
 331                                      &ntlm_state->lm,
 332                                      &ntlm_state->ntlm,
 333                                      ntlm_state->username,
 334                                      ntlm_state->username,
 335                                      ntlm_state->domain,
 336                                      NULL,
 337                                      ntlm_state->nt_hash,
 338                                      &user_sess_key,
 339                                      &lm_sess_key);
 340
 341         assert_int_equal(NT_STATUS_V(status),
 342                          NT_STATUS_V(NT_STATUS_WRONG_PASSWORD));
 343 }
 344
 345 static void test_ntlmv2_only_ntlm_and_lanman(void **state)
 346 {
 347         return test_ntlmv2_only_ntlm(state);
 348 }
 349
 350 static void test_ntlmv2_only_ntlm_once(void **state)
 351 {
 352         DATA_BLOB user_sess_key, lm_sess_key;
 353         struct ntlm_state *ntlm_state
 354                 = talloc_get_type_abort(*state,
 355                                         struct ntlm_state);
 356         NTSTATUS status;
 357         status = ntlm_password_check(ntlm_state,
 358                                      false,
 359                                      NTLM_AUTH_NTLMV2_ONLY,
 360                                      0,
 361                                      &ntlm_state->challenge,
 362                                      &data_blob_null,
 363                                      &ntlm_state->ntlm,
 364                                      ntlm_state->username,
 365                                      ntlm_state->username,
 366                                      ntlm_state->domain,
 367                                      NULL,
 368                                      ntlm_state->nt_hash,
 369                                      &user_sess_key,
 370                                      &lm_sess_key);
 371
 372         assert_int_equal(NT_STATUS_V(status),
 373                          NT_STATUS_V(NT_STATUS_WRONG_PASSWORD));
 374 }
 375
 376 int main(int argc, const char **argv)
 377 {
 378         const struct CMUnitTest tests[] = {
 379                 cmocka_unit_test_setup_teardown(test_ntlm_allowed,
 380                                                 test_ntlm_setup,
 381                                                 test_ntlm_teardown),
 382                 cmocka_unit_test_setup_teardown(test_ntlm_allowed_lm_supplied,
 383                                                 test_ntlm_and_lm_setup,
 384                                                 test_ntlm_teardown),
 385                 cmocka_unit_test_setup_teardown(test_ntlm_disabled,
 386                                                 test_ntlm_setup,
 387                                                 test_ntlm_teardown),
 388                 cmocka_unit_test_setup_teardown(test_ntlm2,
 389                                                 test_ntlm2_setup,
 390                                                 test_ntlm_teardown),
 391                 cmocka_unit_test_setup_teardown(test_ntlm_mschapv2_only_allowed,
 392                                                 test_ntlm_setup,
 393                                                 test_ntlm_teardown),
 394                 cmocka_unit_test_setup_teardown(test_ntlm_mschapv2_only_denied,
 395                                                 test_ntlm_setup,
 396                                                 test_ntlm_teardown),
 397                 cmocka_unit_test_setup_teardown(test_ntlmv2_only_ntlm,
 398                                                 test_ntlm_setup,
 399                                                 test_ntlm_teardown),
 400                 cmocka_unit_test_setup_teardown(test_ntlmv2_only_ntlm_and_lanman,
 401                                                 test_ntlm_and_lm_setup,
 402                                                 test_ntlm_teardown),
 403                 cmocka_unit_test_setup_teardown(test_ntlmv2_only_ntlm_once,
 404                                                 test_ntlm_setup,
 405                                                 test_ntlm_teardown),
 406                 cmocka_unit_test_setup_teardown(test_ntlmv2_only_ntlmv2,
 407                                                 test_ntlmv2_setup,
 408                                                 test_ntlm_teardown)
 409         };
 410
 411         cmocka_set_message_output(CM_OUTPUT_SUBUNIT);
 412         return cmocka_run_group_tests(tests, NULL, NULL);
 413 }