source4/torture/krb5/kdc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Validate the krb5 pac generation routines
   5
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2015
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "system/kerberos.h"
  25 #include "torture/smbtorture.h"
  26 #include "torture/winbind/proto.h"
  27 #include "auth/credentials/credentials.h"
  28 #include "lib/cmdline/popt_common.h"
  29 #include "source4/auth/kerberos/kerberos.h"
  30 #include "source4/auth/kerberos/kerberos_util.h"
  31 #include "lib/util/util_net.h"
  32
  33 enum torture_krb5_test {
  34         TORTURE_KRB5_TEST_PLAIN,
  35         TORTURE_KRB5_TEST_WIN2K,
  36         TORTURE_KRB5_TEST_PAC_REQUEST,
  37         TORTURE_KRB5_TEST_BREAK_PW,
  38         TORTURE_KRB5_TEST_CLOCK_SKEW,
  39 };
  40
  41 struct torture_krb5_context {
  42         struct torture_context *tctx;
  43         struct addrinfo *server;
  44         enum torture_krb5_test test;
  45         int packet_count;
  46         AS_REQ as_req;
  47         AS_REP as_rep;
  48 };
  49
  50 static bool torture_krb5_pre_send_test(struct torture_krb5_context *test_context, const krb5_data *send_buf)
  51 {
  52         size_t used;
  53         switch (test_context->test)
  54         {
  55         case TORTURE_KRB5_TEST_PLAIN:
  56         case TORTURE_KRB5_TEST_WIN2K:
  57         case TORTURE_KRB5_TEST_PAC_REQUEST:
  58         case TORTURE_KRB5_TEST_BREAK_PW:
  59         case TORTURE_KRB5_TEST_CLOCK_SKEW:
  60                 torture_assert_int_equal(test_context->tctx,
  61                                          decode_AS_REQ(send_buf->data, send_buf->length, &test_context->as_req, &used), 0,
  62                                          "decode_AS_REQ failed");
  63                 torture_assert_int_equal(test_context->tctx, used, send_buf->length, "length mismatch");
  64                 torture_assert_int_equal(test_context->tctx, test_context->as_req.pvno, 5, "Got wrong as_req->pvno");
  65                 break;
  66         }
  67         return true;
  68 }
  69
  70 static bool torture_krb5_post_recv_test(struct torture_krb5_context *test_context, const krb5_data *recv_buf)
  71 {
  72         KRB_ERROR error;
  73         size_t used;
  74         switch (test_context->test)
  75         {
  76         case TORTURE_KRB5_TEST_PLAIN:
  77         case TORTURE_KRB5_TEST_WIN2K:
  78                 if (test_context->packet_count == 0) {
  79                         torture_assert_int_equal(test_context->tctx,
  80                                                  decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0,
  81                                                  "decode_AS_REP failed");
  82                         torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
  83                         torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno");
  84                         torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KDC_ERR_PREAUTH_REQUIRED - KRB5KDC_ERR_NONE,
  85                                                  "Got wrong error.error_code");
  86                         free_KRB_ERROR(&error);
  87                 } else if ((decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used) == 0)
  88                            && (test_context->packet_count == 1)) {
  89                         torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
  90                         torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno");
  91                         torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KRB_ERR_RESPONSE_TOO_BIG - KRB5KDC_ERR_NONE,
  92                                                  "Got wrong error.error_code");
  93                         free_KRB_ERROR(&error);
  94                 } else {
  95                         torture_assert_int_equal(test_context->tctx,
  96                                                  decode_AS_REP(recv_buf->data, recv_buf->length, &test_context->as_rep, &used), 0,
  97                                                  "decode_AS_REP failed");
  98                         torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
  99                         torture_assert_int_equal(test_context->tctx,
 100                                                  test_context->as_rep.pvno, 5,
 101                                                  "Got wrong as_rep->pvno");
 102                         torture_assert_int_equal(test_context->tctx,
 103                                                  test_context->as_rep.ticket.tkt_vno, 5,
 104                                                  "Got wrong as_rep->ticket.tkt_vno");
 105                         torture_assert(test_context->tctx,
 106                                        test_context->as_rep.ticket.enc_part.kvno,
 107                                        "Did not get a KVNO in test_context->as_rep.ticket.enc_part.kvno");
 108                         if (torture_setting_bool(test_context->tctx, "expect_rodc", false)) {
 109                                 torture_assert_int_not_equal(test_context->tctx,
 110                                                              *test_context->as_rep.ticket.enc_part.kvno & 0xFFFF0000,
 111                                                              0, "Did not get a RODC number in the KVNO");
 112                         } else {
 113                                 torture_assert_int_equal(test_context->tctx,
 114                                                          *test_context->as_rep.ticket.enc_part.kvno & 0xFFFF0000,
 115                                                          0, "Unexpecedly got a RODC number in the KVNO");
 116                         }
 117                         free_AS_REP(&test_context->as_rep);
 118                 }
 119                 torture_assert(test_context->tctx, test_context->packet_count < 3, "too many packets");
 120                 free_AS_REQ(&test_context->as_req);
 121                 break;
 122         case TORTURE_KRB5_TEST_PAC_REQUEST:
 123                 if (test_context->packet_count == 0) {
 124                         torture_assert_int_equal(test_context->tctx,
 125                                                  decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0,
 126                                                  "decode_AS_REP failed");
 127                         torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
 128                         torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno");
 129                         torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KRB_ERR_RESPONSE_TOO_BIG - KRB5KDC_ERR_NONE,
 130                                                  "Got wrong error.error_code");
 131                         free_KRB_ERROR(&error);
 132                 } else if (test_context->packet_count == 1) {
 133                         torture_assert_int_equal(test_context->tctx,
 134                                                  decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0,
 135                                                  "decode_AS_REP failed");
 136                         torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
 137                         torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno");
 138                         torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KDC_ERR_PREAUTH_REQUIRED - KRB5KDC_ERR_NONE,
 139                                                  "Got wrong error.error_code");
 140                         free_KRB_ERROR(&error);
 141                 } else if ((decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used) == 0)
 142                            && (test_context->packet_count == 2)) {
 143                         torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
 144                         torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno");
 145                         torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KRB_ERR_RESPONSE_TOO_BIG - KRB5KDC_ERR_NONE,
 146                                                  "Got wrong error.error_code");
 147                         free_KRB_ERROR(&error);
 148                 } else {
 149                         torture_assert_int_equal(test_context->tctx,
 150                                                  decode_AS_REP(recv_buf->data, recv_buf->length, &test_context->as_rep, &used), 0,
 151                                                  "decode_AS_REP failed");
 152                         torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
 153                         torture_assert_int_equal(test_context->tctx, test_context->as_rep.pvno, 5, "Got wrong as_rep->pvno");
 154                         free_AS_REP(&test_context->as_rep);
 155                 }
 156                 torture_assert(test_context->tctx, test_context->packet_count < 3, "too many packets");
 157                 free_AS_REQ(&test_context->as_req);
 158                 break;
 159         case TORTURE_KRB5_TEST_BREAK_PW:
 160                 if (test_context->packet_count == 0) {
 161                         torture_assert_int_equal(test_context->tctx,
 162                                                  decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0,
 163                                                  "decode_AS_REP failed");
 164                         torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
 165                         torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno");
 166                         torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KDC_ERR_PREAUTH_REQUIRED - KRB5KDC_ERR_NONE,
 167                                                  "Got wrong error.error_code");
 168                         free_KRB_ERROR(&error);
 169                 } else if (test_context->packet_count == 1) {
 170                         torture_assert_int_equal(test_context->tctx,
 171                                                  decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0,
 172                                                  "decode_AS_REP failed");
 173                         torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
 174                         torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno");
 175                         torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KDC_ERR_PREAUTH_FAILED - KRB5KDC_ERR_NONE,
 176                                                  "Got wrong error.error_code");
 177                         free_KRB_ERROR(&error);
 178                 }
 179                 torture_assert(test_context->tctx, test_context->packet_count < 2, "too many packets");
 180                 free_AS_REQ(&test_context->as_req);
 181                 break;
 182         case TORTURE_KRB5_TEST_CLOCK_SKEW:
 183                 if (test_context->packet_count == 0) {
 184                         torture_assert_int_equal(test_context->tctx,
 185                                                  decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0,
 186                                                  "decode_AS_REP failed");
 187                         torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
 188                         torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno");
 189                         torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KDC_ERR_PREAUTH_REQUIRED - KRB5KDC_ERR_NONE,
 190                                                  "Got wrong error.error_code");
 191                         free_KRB_ERROR(&error);
 192                 } else if (test_context->packet_count == 1) {
 193                         torture_assert_int_equal(test_context->tctx,
 194                                                  decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used), 0,
 195                                                  "decode_AS_REP failed");
 196                         torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
 197                         torture_assert_int_equal(test_context->tctx, error.pvno, 5, "Got wrong error.pvno");
 198                         torture_assert_int_equal(test_context->tctx, error.error_code, KRB5KRB_AP_ERR_SKEW - KRB5KDC_ERR_NONE,
 199                                                  "Got wrong error.error_code");
 200                         free_KRB_ERROR(&error);
 201                 }
 202                 torture_assert(test_context->tctx, test_context->packet_count < 2, "too many packets");
 203                 free_AS_REQ(&test_context->as_req);
 204                 break;
 205         }
 206         return true;
 207 }
 208
 209 static krb5_error_code smb_krb5_send_and_recv_func_override(krb5_context context,
 210                                                     void *data, /* struct torture_krb5_context */
 211                                                     krb5_krbhst_info *hi,
 212                                                     time_t timeout,
 213                                                     const krb5_data *send_buf,
 214                                                     krb5_data *recv_buf)
 215 {
 216         krb5_error_code k5ret;
 217         bool ok;
 218
 219         struct torture_krb5_context *test_context
 220                 = talloc_get_type_abort(data, struct torture_krb5_context);
 221
 222         ok = torture_krb5_pre_send_test(test_context, send_buf);
 223         if (ok == false) {
 224                 return EINVAL;
 225         }
 226
 227         k5ret = smb_krb5_send_and_recv_func_forced(context, test_context->server,
 228                                                     hi, timeout, send_buf, recv_buf);
 229
 230         ok = torture_krb5_post_recv_test(test_context, recv_buf);
 231         if (ok == false) {
 232                 return EINVAL;
 233         }
 234
 235         test_context->packet_count++;
 236
 237         return k5ret;
 238 }
 239
 240 static int test_context_destructor(struct torture_krb5_context *test_context)
 241 {
 242         freeaddrinfo(test_context->server);
 243         return 0;
 244 }
 245
 246
 247 static bool torture_krb5_init_context(struct torture_context *tctx,
 248                                       enum torture_krb5_test test,
 249                                       struct smb_krb5_context **smb_krb5_context)
 250 {
 251         const char *host = torture_setting_string(tctx, "host", NULL);
 252         krb5_error_code k5ret;
 253         bool ok;
 254
 255         struct torture_krb5_context *test_context = talloc_zero(tctx, struct torture_krb5_context);
 256         torture_assert(tctx, test_context != NULL, "Failed to allocate");
 257
 258         test_context->test = test;
 259         test_context->tctx = tctx;
 260
 261         k5ret = smb_krb5_init_context(tctx, tctx->lp_ctx, smb_krb5_context);
 262         torture_assert_int_equal(tctx, k5ret, 0, "smb_krb5_init_context failed");
 263
 264         ok = interpret_string_addr_internal(&test_context->server, host, AI_NUMERICHOST);
 265         torture_assert(tctx, ok, "Failed to parse target server");
 266
 267         talloc_set_destructor(test_context, test_context_destructor);
 268
 269         set_sockaddr_port(test_context->server->ai_addr, 88);
 270
 271         k5ret = krb5_set_send_to_kdc_func((*smb_krb5_context)->krb5_context,
 272                                           smb_krb5_send_and_recv_func_override,
 273                                           test_context);
 274         torture_assert_int_equal(tctx, k5ret, 0, "krb5_set_send_to_kdc_func failed");
 275         return true;
 276 }
 277
 278 static bool torture_krb5_as_req_creds(struct torture_context *tctx,
 279                                       struct cli_credentials *credentials,
 280                                       enum torture_krb5_test test)
 281 {
 282         krb5_error_code k5ret;
 283         bool ok;
 284         krb5_creds my_creds;
 285         krb5_principal principal;
 286         struct smb_krb5_context *smb_krb5_context;
 287         enum credentials_obtained obtained;
 288         const char *error_string;
 289         const char *password = cli_credentials_get_password(credentials);
 290         krb5_get_init_creds_opt *krb_options = NULL;
 291
 292         ok = torture_krb5_init_context(tctx, test, &smb_krb5_context);
 293         torture_assert(tctx, ok, "torture_krb5_init_context failed");
 294
 295         k5ret = principal_from_credentials(tctx, credentials, smb_krb5_context,
 296                                            &principal, &obtained,  &error_string);
 297         torture_assert_int_equal(tctx, k5ret, 0, error_string);
 298
 299         switch (test)
 300         {
 301         case TORTURE_KRB5_TEST_PLAIN:
 302                 break;
 303
 304         case TORTURE_KRB5_TEST_WIN2K:
 305                 torture_assert_int_equal(tctx,
 306                                          krb5_get_init_creds_opt_alloc(smb_krb5_context->krb5_context, &krb_options),
 307                                          0, "krb5_get_init_creds_opt_alloc failed");
 308
 309                 torture_assert_int_equal(tctx,
 310                                          krb5_get_init_creds_opt_set_win2k(smb_krb5_context->krb5_context, krb_options, true),
 311                                          0, "krb5_get_init_creds_opt_set_win2k failed");
 312                 break;
 313
 314         case TORTURE_KRB5_TEST_PAC_REQUEST:
 315                 torture_assert_int_equal(tctx,
 316                                          krb5_get_init_creds_opt_alloc(smb_krb5_context->krb5_context, &krb_options),
 317                                          0, "krb5_get_init_creds_opt_alloc failed");
 318
 319                 torture_assert_int_equal(tctx,
 320                                          krb5_get_init_creds_opt_set_pac_request(smb_krb5_context->krb5_context, krb_options, true),
 321                                          0, "krb5_get_init_creds_opt_set_pac_request failed");
 322                 break;
 323
 324         case TORTURE_KRB5_TEST_BREAK_PW:
 325                 password = "NOT the password";
 326                 break;
 327
 328         case TORTURE_KRB5_TEST_CLOCK_SKEW:
 329                 torture_assert_int_equal(tctx,
 330                                          krb5_set_real_time(smb_krb5_context->krb5_context, time(NULL) + 3600, 0),
 331                                          0, "krb5_set_real_time failed");
 332                 break;
 333
 334         break;
 335         }
 336         k5ret = krb5_get_init_creds_password(smb_krb5_context->krb5_context, &my_creds, principal,
 337                                              password, NULL, NULL, 0,
 338                                              NULL, krb_options);
 339         krb5_get_init_creds_opt_free(smb_krb5_context->krb5_context, krb_options);
 340
 341         switch (test)
 342         {
 343         case TORTURE_KRB5_TEST_PLAIN:
 344         case TORTURE_KRB5_TEST_WIN2K:
 345         case TORTURE_KRB5_TEST_PAC_REQUEST:
 346                 torture_assert_int_equal(tctx, k5ret, 0, "krb5_get_init_creds_password failed");
 347                 break;
 348
 349         case TORTURE_KRB5_TEST_BREAK_PW:
 350                 torture_assert_int_equal(tctx, k5ret, KRB5KDC_ERR_PREAUTH_FAILED, "krb5_get_init_creds_password should have failed");
 351                 return true;
 352
 353         case TORTURE_KRB5_TEST_CLOCK_SKEW:
 354                 torture_assert_int_equal(tctx, k5ret, KRB5KRB_AP_ERR_SKEW, "krb5_get_init_creds_password should have failed");
 355                 return true;
 356
 357         }
 358
 359         torture_assert_int_equal(tctx,
 360                                  krb5_principal_get_type(smb_krb5_context->krb5_context,
 361                                                          my_creds.client), KRB5_NT_PRINCIPAL,
 362                                  "smb_krb5_init_context gave incorrect client->name.name_type");
 363
 364         torture_assert(tctx, krb5_principal_compare(smb_krb5_context->krb5_context,
 365                                                     principal, my_creds.client),
 366                        "krb5_get_init_creds_password returned a different principal");
 367
 368         torture_assert_int_equal(tctx,
 369                                  krb5_principal_get_type(smb_krb5_context->krb5_context,
 370                                                          my_creds.server), KRB5_NT_SRV_INST,
 371                                  "smb_krb5_init_context gave incorrect client->name.name_type");
 372
 373         torture_assert_str_equal(tctx, krb5_principal_get_comp_string(smb_krb5_context->krb5_context,
 374                                                                       my_creds.server, 0),
 375                                  "krbtgt",
 376                                  "smb_krb5_init_context gave incorrect my_creds.server->name.name_string[0]");
 377
 378         k5ret = krb5_free_cred_contents(smb_krb5_context->krb5_context, &my_creds);
 379         torture_assert_int_equal(tctx, k5ret, 0, "krb5_free_creds failed");
 380
 381         return true;
 382 }
 383
 384 static bool torture_krb5_as_req_cmdline(struct torture_context *tctx)
 385 {
 386         return torture_krb5_as_req_creds(tctx, cmdline_credentials, TORTURE_KRB5_TEST_PLAIN);
 387 }
 388
 389 static bool torture_krb5_as_req_win2k(struct torture_context *tctx)
 390 {
 391         return torture_krb5_as_req_creds(tctx, cmdline_credentials, TORTURE_KRB5_TEST_WIN2K);
 392 }
 393
 394 static bool torture_krb5_as_req_pac_request(struct torture_context *tctx)
 395 {
 396         return torture_krb5_as_req_creds(tctx, cmdline_credentials, TORTURE_KRB5_TEST_PAC_REQUEST);
 397 }
 398
 399 static bool torture_krb5_as_req_break_pw(struct torture_context *tctx)
 400 {
 401         return torture_krb5_as_req_creds(tctx, cmdline_credentials, TORTURE_KRB5_TEST_BREAK_PW);
 402 }
 403
 404 static bool torture_krb5_as_req_clock_skew(struct torture_context *tctx)
 405 {
 406         return torture_krb5_as_req_creds(tctx, cmdline_credentials, TORTURE_KRB5_TEST_CLOCK_SKEW);
 407 }
 408
 409 NTSTATUS torture_krb5_init(void);
 410 NTSTATUS torture_krb5_init(void)
 411 {
 412         struct torture_suite *suite = torture_suite_create(talloc_autofree_context(), "krb5");
 413         struct torture_suite *kdc_suite = torture_suite_create(suite, "kdc");
 414         suite->description = talloc_strdup(suite, "Kerberos tests");
 415         kdc_suite->description = talloc_strdup(kdc_suite, "Kerberos KDC tests");
 416
 417         torture_suite_add_simple_test(kdc_suite, "as-req-cmdline",
 418                                       torture_krb5_as_req_cmdline);
 419
 420         torture_suite_add_simple_test(kdc_suite, "as-req-win2k",
 421                                       torture_krb5_as_req_win2k);
 422
 423         torture_suite_add_simple_test(kdc_suite, "as-req-pac-request",
 424                                       torture_krb5_as_req_pac_request);
 425
 426         torture_suite_add_simple_test(kdc_suite, "as-req-break-pw",
 427                                       torture_krb5_as_req_break_pw);
 428
 429         torture_suite_add_simple_test(kdc_suite, "as-req-clock-skew",
 430                                       torture_krb5_as_req_clock_skew);
 431
 432         torture_suite_add_suite(suite, kdc_suite);
 433
 434         torture_register_suite(suite);
 435         return NT_STATUS_OK;
 436 }