lib/gssapi/test_context.c

   1 /*
   2  * Copyright (c) 2006 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of KTH nor the names of its contributors may be
  18  *    used to endorse or promote products derived from this software without
  19  *    specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  22  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
  25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  28  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include "krb5/gsskrb5_locl.h"
  35 #include <err.h>
  36 #include <getarg.h>
  37 #include "test_common.h"
  38
  39 RCSID("$Id$");
  40
  41 static char *type_string;
  42 static char *mech_string;
  43 static char *ret_mech_string;
  44 static int dns_canon_flag = -1;
  45 static int mutual_auth_flag = 0;
  46 static int dce_style_flag = 0;
  47 static int wrapunwrap_flag = 0;
  48 static int getverifymic_flag = 0;
  49 static int deleg_flag = 0;
  50 static char *gsskrb5_acceptor_identity;
  51 static int version_flag = 0;
  52 static int verbose_flag = 0;
  53 static int help_flag    = 0;
  54
  55 static struct {
  56     const char *name;
  57     gss_OID *oid;
  58 } o2n[] = {
  59     { "krb5", &GSS_KRB5_MECHANISM },
  60     { "spnego", &GSS_SPNEGO_MECHANISM },
  61     { "ntlm", &GSS_NTLM_MECHANISM },
  62     { "sasl-digest-md5", &GSS_SASL_DIGEST_MD5_MECHANISM }
  63 };
  64
  65 static gss_OID
  66 string_to_oid(const char *name)
  67 {
  68     int i;
  69     for (i = 0; i < sizeof(o2n)/sizeof(o2n[0]); i++)
  70         if (strcasecmp(name, o2n[i].name) == 0)
  71             return *o2n[i].oid;
  72     errx(1, "name %s not unknown", name);
  73 }
  74
  75 static const char *
  76 oid_to_string(const gss_OID oid)
  77 {
  78     int i;
  79     for (i = 0; i < sizeof(o2n)/sizeof(o2n[0]); i++)
  80         if (gss_oid_equal(oid, *o2n[i].oid))
  81             return o2n[i].name;
  82     return "unknown oid";
  83 }
  84
  85 static void
  86 loop(gss_OID mechoid,
  87      gss_OID nameoid, const char *target,
  88      gss_cred_id_t init_cred,
  89      gss_ctx_id_t *sctx, gss_ctx_id_t *cctx,
  90      gss_OID *actual_mech,
  91      gss_cred_id_t *deleg_cred)
  92 {
  93     int server_done = 0, client_done = 0;
  94     OM_uint32 maj_stat, min_stat;
  95     gss_name_t gss_target_name;
  96     gss_buffer_desc input_token, output_token;
  97     OM_uint32 flags = 0, ret_cflags, ret_sflags;
  98     gss_OID actual_mech_client;
  99     gss_OID actual_mech_server;
 100
 101     *actual_mech = GSS_C_NO_OID;
 102
 103     flags |= GSS_C_INTEG_FLAG;
 104     flags |= GSS_C_CONF_FLAG;
 105
 106     if (mutual_auth_flag)
 107         flags |= GSS_C_MUTUAL_FLAG;
 108     if (dce_style_flag)
 109         flags |= GSS_C_DCE_STYLE;
 110     if (deleg_flag)
 111         flags |= GSS_C_DELEG_FLAG;
 112
 113     input_token.value = rk_UNCONST(target);
 114     input_token.length = strlen(target);
 115
 116     maj_stat = gss_import_name(&min_stat,
 117                                &input_token,
 118                                nameoid,
 119                                &gss_target_name);
 120     if (GSS_ERROR(maj_stat))
 121         err(1, "import name creds failed with: %d", maj_stat);
 122
 123     input_token.length = 0;
 124     input_token.value = NULL;
 125
 126     while (!server_done || !client_done) {
 127
 128         maj_stat = gss_init_sec_context(&min_stat,
 129                                         init_cred,
 130                                         cctx,
 131                                         gss_target_name,
 132                                         mechoid,
 133                                         flags,
 134                                         0,
 135                                         NULL,
 136                                         &input_token,
 137                                         &actual_mech_client,
 138                                         &output_token,
 139                                         &ret_cflags,
 140                                         NULL);
 141         if (GSS_ERROR(maj_stat))
 142             errx(1, "init_sec_context: %s",
 143                  gssapi_err(maj_stat, min_stat, mechoid));
 144         if (maj_stat & GSS_S_CONTINUE_NEEDED)
 145             ;
 146         else
 147             client_done = 1;
 148
 149         if (client_done && server_done)
 150             break;
 151
 152         if (input_token.length != 0)
 153             gss_release_buffer(&min_stat, &input_token);
 154
 155         maj_stat = gss_accept_sec_context(&min_stat,
 156                                           sctx,
 157                                           GSS_C_NO_CREDENTIAL,
 158                                           &output_token,
 159                                           GSS_C_NO_CHANNEL_BINDINGS,
 160                                           NULL,
 161                                           &actual_mech_server,
 162                                           &input_token,
 163                                           &ret_sflags,
 164                                           NULL,
 165                                           deleg_cred);
 166         if (GSS_ERROR(maj_stat))
 167                 errx(1, "accept_sec_context: %s",
 168                      gssapi_err(maj_stat, min_stat, actual_mech_server));
 169
 170         if (verbose_flag)
 171             printf("%.*s", (int)input_token.length, (char *)input_token.value);
 172
 173         if (output_token.length != 0)
 174             gss_release_buffer(&min_stat, &output_token);
 175
 176         if (maj_stat & GSS_S_CONTINUE_NEEDED)
 177             ;
 178         else
 179             server_done = 1;
 180     }
 181     if (output_token.length != 0)
 182         gss_release_buffer(&min_stat, &output_token);
 183     if (input_token.length != 0)
 184         gss_release_buffer(&min_stat, &input_token);
 185     gss_release_name(&min_stat, &gss_target_name);
 186
 187     if (gss_oid_equal(actual_mech_server, actual_mech_client) == 0)
 188         errx(1, "mech mismatch");
 189     *actual_mech = actual_mech_server;
 190 }
 191
 192 static void
 193 wrapunwrap(gss_ctx_id_t cctx, gss_ctx_id_t sctx, gss_OID mechoid)
 194 {
 195     gss_buffer_desc input_token, output_token, output_token2;
 196     OM_uint32 min_stat, maj_stat;
 197     int32_t flags = 0;
 198     gss_qop_t qop_state;
 199     int conf_state;
 200
 201     input_token.value = "foo";
 202     input_token.length = 3;
 203
 204     maj_stat = gss_wrap(&min_stat, cctx, flags, 0, &input_token,
 205                         &conf_state, &output_token);
 206     if (maj_stat != GSS_S_COMPLETE)
 207         errx(1, "gss_wrap failed: %s",
 208              gssapi_err(maj_stat, min_stat, mechoid));
 209
 210     maj_stat = gss_unwrap(&min_stat, sctx, &output_token,
 211                           &output_token2, &conf_state, &qop_state);
 212     if (maj_stat != GSS_S_COMPLETE)
 213         errx(1, "gss_unwrap failed: %s",
 214              gssapi_err(maj_stat, min_stat, mechoid));
 215 }
 216
 217 static void
 218 getverifymic(gss_ctx_id_t cctx, gss_ctx_id_t sctx, gss_OID mechoid)
 219 {
 220     gss_buffer_desc input_token, output_token;
 221     OM_uint32 min_stat, maj_stat;
 222     gss_qop_t qop_state;
 223
 224     input_token.value = "bar";
 225     input_token.length = 3;
 226
 227     maj_stat = gss_get_mic(&min_stat, cctx, 0, &input_token,
 228                            &output_token);
 229     if (maj_stat != GSS_S_COMPLETE)
 230         errx(1, "gss_get_mic failed: %s",
 231              gssapi_err(maj_stat, min_stat, mechoid));
 232
 233     maj_stat = gss_verify_mic(&min_stat, sctx, &input_token,
 234                               &output_token, &qop_state);
 235     if (maj_stat != GSS_S_COMPLETE)
 236         errx(1, "gss_verify_mic failed: %s",
 237              gssapi_err(maj_stat, min_stat, mechoid));
 238 }
 239
 240
 241 /*
 242  *
 243  */
 244
 245 static struct getargs args[] = {
 246     {"name-type",0,     arg_string, &type_string,  "type of name", NULL },
 247     {"mech-type",0,     arg_string, &mech_string,  "type of mech", NULL },
 248     {"ret-mech-type",0, arg_string, &ret_mech_string,
 249      "type of return mech", NULL },
 250     {"dns-canonicalize",0,arg_negative_flag, &dns_canon_flag,
 251      "use dns to canonicalize", NULL },
 252     {"mutual-auth",0,   arg_flag,       &mutual_auth_flag,"mutual auth", NULL },
 253     {"dce-style",0,     arg_flag,       &dce_style_flag, "dce-style", NULL },
 254     {"wrapunwrap",0,    arg_flag,       &wrapunwrap_flag, "wrap/unwrap", NULL },
 255     {"getverifymic",0,  arg_flag,       &getverifymic_flag,
 256      "get and verify mic", NULL },
 257     {"delegate",0,      arg_flag,       &deleg_flag, "delegate credential", NULL },
 258     {"gsskrb5-acceptor-identity", 0, arg_string, &gsskrb5_acceptor_identity, "keytab", NULL },
 259     {"version", 0,      arg_flag,       &version_flag, "print version", NULL },
 260     {"verbose", 'v',    arg_flag,       &verbose_flag, "verbose", NULL },
 261     {"help",    0,      arg_flag,       &help_flag,  NULL, NULL }
 262 };
 263
 264 static void
 265 usage (int ret)
 266 {
 267     arg_printusage (args, sizeof(args)/sizeof(*args),
 268                     NULL, "service@host");
 269     exit (ret);
 270 }
 271
 272 int
 273 main(int argc, char **argv)
 274 {
 275     int optind = 0;
 276     OM_uint32 min_stat, maj_stat;
 277     gss_ctx_id_t cctx, sctx;
 278     void *ctx;
 279     gss_OID nameoid, mechoid, actual_mech;
 280     gss_cred_id_t deleg_cred = GSS_C_NO_CREDENTIAL;
 281
 282     setprogname(argv[0]);
 283
 284     cctx = sctx = GSS_C_NO_CONTEXT;
 285
 286     if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optind))
 287         usage(1);
 288
 289     if (help_flag)
 290         usage (0);
 291
 292     if(version_flag){
 293         print_version(NULL);
 294         exit(0);
 295     }
 296
 297     argc -= optind;
 298     argv += optind;
 299
 300     if (argc != 1)
 301         usage(1);
 302
 303     if (dns_canon_flag != -1)
 304         gsskrb5_set_dns_canonicalize(dns_canon_flag);
 305
 306     if (type_string == NULL)
 307         nameoid = GSS_C_NT_HOSTBASED_SERVICE;
 308     else if (strcmp(type_string, "hostbased-service") == 0)
 309         nameoid = GSS_C_NT_HOSTBASED_SERVICE;
 310     else if (strcmp(type_string, "krb5-principal-name") == 0)
 311         nameoid = GSS_KRB5_NT_PRINCIPAL_NAME;
 312     else
 313         errx(1, "%s not suppported", type_string);
 314
 315     if (mech_string == NULL)
 316         mechoid = GSS_KRB5_MECHANISM;
 317     else
 318         mechoid = string_to_oid(mech_string);
 319
 320     if (gsskrb5_acceptor_identity)
 321         gsskrb5_register_acceptor_identity(gsskrb5_acceptor_identity);
 322
 323     loop(mechoid, nameoid, argv[0], GSS_C_NO_CREDENTIAL,
 324          &sctx, &cctx, &actual_mech, &deleg_cred);
 325
 326     if (verbose_flag)
 327         printf("resulting mech: %s\n", oid_to_string(actual_mech));
 328
 329     if (ret_mech_string) {
 330         gss_OID retoid;
 331
 332         retoid = string_to_oid(ret_mech_string);
 333
 334         if (gss_oid_equal(retoid, actual_mech) == 0)
 335             errx(1, "actual_mech mech is not the expected type %s",
 336                  ret_mech_string);
 337     }
 338
 339     /* XXX should be actual_mech */
 340     if (gss_oid_equal(mechoid, GSS_KRB5_MECHANISM)) {
 341         krb5_context context;
 342         time_t time, skew;
 343         gss_buffer_desc authz_data;
 344         gss_buffer_desc in, out1, out2;
 345         krb5_keyblock *keyblock, *keyblock2;
 346         krb5_timestamp now;
 347         krb5_error_code ret;
 348
 349         ret = krb5_init_context(&context);
 350         if (ret)
 351             errx(1, "krb5_init_context");
 352
 353         ret = krb5_timeofday(context, &now);
 354         if (ret)
 355                 errx(1, "krb5_timeofday failed");
 356
 357         /* client */
 358         maj_stat = gss_krb5_export_lucid_sec_context(&min_stat,
 359                                                      &cctx,
 360                                                      1, /* version */
 361                                                      &ctx);
 362         if (maj_stat != GSS_S_COMPLETE)
 363                 errx(1, "gss_krb5_export_lucid_sec_context failed: %s",
 364                      gssapi_err(maj_stat, min_stat, actual_mech));
 365
 366
 367         maj_stat = gss_krb5_free_lucid_sec_context(&maj_stat, ctx);
 368         if (maj_stat != GSS_S_COMPLETE)
 369             errx(1, "gss_krb5_free_lucid_sec_context failed: %s",
 370                      gssapi_err(maj_stat, min_stat, actual_mech));
 371
 372         /* server */
 373         maj_stat = gss_krb5_export_lucid_sec_context(&min_stat,
 374                                                      &sctx,
 375                                                      1, /* version */
 376                                                      &ctx);
 377         if (maj_stat != GSS_S_COMPLETE)
 378             errx(1, "gss_krb5_export_lucid_sec_context failed: %s",
 379                      gssapi_err(maj_stat, min_stat, actual_mech));
 380         maj_stat = gss_krb5_free_lucid_sec_context(&min_stat, ctx);
 381         if (maj_stat != GSS_S_COMPLETE)
 382             errx(1, "gss_krb5_free_lucid_sec_context failed: %s",
 383                      gssapi_err(maj_stat, min_stat, actual_mech));
 384
 385         maj_stat = gsskrb5_extract_authtime_from_sec_context(&min_stat,
 386                                                              sctx,
 387                                                              &time);
 388         if (maj_stat != GSS_S_COMPLETE)
 389             errx(1, "gsskrb5_extract_authtime_from_sec_context failed: %s",
 390                      gssapi_err(maj_stat, min_stat, actual_mech));
 391
 392         skew = abs(time - now);
 393         if (skew > krb5_get_max_time_skew(context)) {
 394             errx(1, "gsskrb5_extract_authtime_from_sec_context failed: "
 395                  "time skew too great %llu > %llu",
 396                  (unsigned long long)skew,
 397                  (unsigned long long)krb5_get_max_time_skew(context));
 398         }
 399
 400         maj_stat = gsskrb5_extract_service_keyblock(&min_stat,
 401                                                     sctx,
 402                                                     &keyblock);
 403         if (maj_stat != GSS_S_COMPLETE)
 404             errx(1, "gsskrb5_export_service_keyblock failed: %s",
 405                      gssapi_err(maj_stat, min_stat, actual_mech));
 406
 407         krb5_free_keyblock(context, keyblock);
 408
 409         maj_stat = gsskrb5_get_subkey(&min_stat,
 410                                       sctx,
 411                                       &keyblock);
 412         if (maj_stat != GSS_S_COMPLETE
 413             && (!(maj_stat == GSS_S_FAILURE && min_stat == GSS_KRB5_S_KG_NO_SUBKEY)))
 414             errx(1, "gsskrb5_get_subkey server failed: %s",
 415                      gssapi_err(maj_stat, min_stat, actual_mech));
 416
 417         if (maj_stat != GSS_S_COMPLETE)
 418             keyblock = NULL;
 419
 420         maj_stat = gsskrb5_get_subkey(&min_stat,
 421                                       cctx,
 422                                       &keyblock2);
 423         if (maj_stat != GSS_S_COMPLETE
 424             && (!(maj_stat == GSS_S_FAILURE && min_stat == GSS_KRB5_S_KG_NO_SUBKEY)))
 425             errx(1, "gsskrb5_get_subkey client failed: %s",
 426                      gssapi_err(maj_stat, min_stat, actual_mech));
 427
 428         if (maj_stat != GSS_S_COMPLETE)
 429             keyblock2 = NULL;
 430
 431         if (keyblock || keyblock2) {
 432             if (keyblock == NULL)
 433                 errx(1, "server missing token keyblock");
 434             if (keyblock2 == NULL)
 435                 errx(1, "client missing token keyblock");
 436
 437             if (keyblock->keytype != keyblock2->keytype)
 438                 errx(1, "enctype mismatch");
 439             if (keyblock->keyvalue.length != keyblock2->keyvalue.length)
 440                 errx(1, "key length mismatch");
 441             if (memcmp(keyblock->keyvalue.data, keyblock2->keyvalue.data,
 442                        keyblock2->keyvalue.length) != 0)
 443                 errx(1, "key data mismatch");
 444         }
 445
 446         if (keyblock)
 447             krb5_free_keyblock(context, keyblock);
 448         if (keyblock2)
 449             krb5_free_keyblock(context, keyblock2);
 450
 451         maj_stat = gsskrb5_get_initiator_subkey(&min_stat,
 452                                                 sctx,
 453                                                 &keyblock);
 454         if (maj_stat != GSS_S_COMPLETE
 455             && (!(maj_stat == GSS_S_FAILURE && min_stat == GSS_KRB5_S_KG_NO_SUBKEY)))
 456             errx(1, "gsskrb5_get_initiator_subkey failed: %s",
 457                      gssapi_err(maj_stat, min_stat, actual_mech));
 458
 459         if (maj_stat == GSS_S_COMPLETE)
 460             krb5_free_keyblock(context, keyblock);
 461
 462         maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
 463                                                                sctx,
 464                                                                128,
 465                                                                &authz_data);
 466         if (maj_stat == GSS_S_COMPLETE)
 467             gss_release_buffer(&min_stat, &authz_data);
 468
 469         krb5_free_context(context);
 470
 471
 472         memset(&out1, 0, sizeof(out1));
 473         memset(&out2, 0, sizeof(out2));
 474
 475         in.value = "foo";
 476         in.length = 3;
 477
 478         gss_pseudo_random(&min_stat, sctx, GSS_C_PRF_KEY_FULL, &in,
 479                           100, &out1);
 480         gss_pseudo_random(&min_stat, cctx, GSS_C_PRF_KEY_FULL, &in,
 481                           100, &out2);
 482
 483         if (out1.length != out2.length)
 484             errx(1, "prf len mismatch");
 485         if (memcmp(out1.value, out2.value, out1.length) != 0)
 486             errx(1, "prf data mismatch");
 487
 488         gss_release_buffer(&min_stat, &out1);
 489
 490         gss_pseudo_random(&min_stat, sctx, GSS_C_PRF_KEY_FULL, &in,
 491                           100, &out1);
 492
 493         if (out1.length != out2.length)
 494             errx(1, "prf len mismatch");
 495         if (memcmp(out1.value, out2.value, out1.length) != 0)
 496             errx(1, "prf data mismatch");
 497
 498         gss_release_buffer(&min_stat, &out1);
 499         gss_release_buffer(&min_stat, &out2);
 500
 501         in.value = "bar";
 502         in.length = 3;
 503
 504         gss_pseudo_random(&min_stat, sctx, GSS_C_PRF_KEY_PARTIAL, &in,
 505                           100, &out1);
 506         gss_pseudo_random(&min_stat, cctx, GSS_C_PRF_KEY_PARTIAL, &in,
 507                           100, &out2);
 508
 509         if (out1.length != out2.length)
 510             errx(1, "prf len mismatch");
 511         if (memcmp(out1.value, out2.value, out1.length) != 0)
 512             errx(1, "prf data mismatch");
 513
 514         gss_release_buffer(&min_stat, &out1);
 515         gss_release_buffer(&min_stat, &out2);
 516
 517         wrapunwrap_flag = 1;
 518         getverifymic_flag = 1;
 519     }
 520
 521     if (wrapunwrap_flag) {
 522         wrapunwrap(cctx, sctx, actual_mech);
 523         wrapunwrap(cctx, sctx, actual_mech);
 524         wrapunwrap(sctx, cctx, actual_mech);
 525         wrapunwrap(sctx, cctx, actual_mech);
 526     }
 527     if (getverifymic_flag) {
 528         getverifymic(cctx, sctx, actual_mech);
 529         getverifymic(cctx, sctx, actual_mech);
 530         getverifymic(sctx, cctx, actual_mech);
 531         getverifymic(sctx, cctx, actual_mech);
 532     }
 533
 534     gss_delete_sec_context(&min_stat, &cctx, NULL);
 535     gss_delete_sec_context(&min_stat, &sctx, NULL);
 536
 537     if (deleg_cred != GSS_C_NO_CREDENTIAL) {
 538
 539         loop(mechoid, nameoid, argv[0], deleg_cred, &cctx, &sctx, &actual_mech, NULL);
 540
 541         gss_delete_sec_context(&min_stat, &cctx, NULL);
 542         gss_delete_sec_context(&min_stat, &sctx, NULL);
 543
 544     }
 545
 546     return 0;
 547 }