www.project-moonshot.org Git - mech_eap.orig/blob - util_name.c

   1 /*
   2  * Copyright (c) 2011, JANET(UK)
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * 3. Neither the name of JANET(UK) nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32 /*
  33  * Portions Copyright 2009 by the Massachusetts Institute of Technology.
  34  * All Rights Reserved.
  35  *
  36  * Export of this software from the United States of America may
  37  *   require a specific license from the United States Government.
  38  *   It is the responsibility of any person or organization contemplating
  39  *   export to obtain such a license before exporting.
  40  *
  41  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
  42  * distribute this software and its documentation for any purpose and
  43  * without fee is hereby granted, provided that the above copyright
  44  * notice appear in all copies and that both that copyright notice and
  45  * this permission notice appear in supporting documentation, and that
  46  * the name of M.I.T. not be used in advertising or publicity pertaining
  47  * to distribution of the software without specific, written prior
  48  * permission.  Furthermore if you modify this software you must label
  49  * your software as modified software and not distribute it in such a
  50  * fashion that it might be confused with the original M.I.T. software.
  51  * M.I.T. makes no representations about the suitability of
  52  * this software for any purpose.  It is provided "as is" without express
  53  * or implied warranty.
  54  */
  55
  56 /*
  57  * Name utility routines.
  58  */
  59
  60 #include "gssapiP_eap.h"
  61
  62 static gss_OID_desc gssEapNtEapName = {
  63     /* 1.3.6.1.4.1.5322.22.2.1  */
  64     10, "\x2B\x06\x01\x04\x01\xA9\x4A\x16\x02\x01"
  65 };
  66
  67 gss_OID GSS_EAP_NT_EAP_NAME = &gssEapNtEapName;
  68
  69 OM_uint32
  70 gssEapAllocName(OM_uint32 *minor, gss_name_t *pName)
  71 {
  72     OM_uint32 tmpMinor;
  73     gss_name_t name;
  74
  75     *pName = GSS_C_NO_NAME;
  76
  77     name = (gss_name_t)GSSEAP_CALLOC(1, sizeof(*name));
  78     if (name == NULL) {
  79         *minor = ENOMEM;
  80         return GSS_S_FAILURE;
  81     }
  82
  83     if (GSSEAP_MUTEX_INIT(&name->mutex) != 0) {
  84         *minor = errno;
  85         gssEapReleaseName(&tmpMinor, &name);
  86         return GSS_S_FAILURE;
  87     }
  88
  89     *pName = name;
  90
  91     return GSS_S_COMPLETE;
  92 }
  93
  94 OM_uint32
  95 gssEapReleaseName(OM_uint32 *minor, gss_name_t *pName)
  96 {
  97     gss_name_t name;
  98     krb5_context krbContext = NULL;
  99     OM_uint32 tmpMinor;
 100
 101     *minor = 0;
 102
 103     if (pName == NULL) {
 104         return GSS_S_COMPLETE;
 105     }
 106
 107     name = *pName;
 108     if (name == GSS_C_NO_NAME) {
 109         return GSS_S_COMPLETE;
 110     }
 111
 112     GSSEAP_KRB_INIT(&krbContext);
 113     krb5_free_principal(krbContext, name->krbPrincipal);
 114     gssEapReleaseOid(&tmpMinor, &name->mechanismUsed);
 115
 116     gssEapReleaseAttrContext(&tmpMinor, name);
 117
 118     GSSEAP_MUTEX_DESTROY(&name->mutex);
 119     GSSEAP_FREE(name);
 120     *pName = NULL;
 121
 122     return GSS_S_COMPLETE;
 123 }
 124
 125 static OM_uint32
 126 krbPrincipalToName(OM_uint32 *minor,
 127                    krb5_principal *principal,
 128                    gss_name_t *pName)
 129 {
 130     OM_uint32 major;
 131     gss_name_t name;
 132
 133     major = gssEapAllocName(minor, &name);
 134     if (GSS_ERROR(major))
 135         return major;
 136
 137     name->krbPrincipal = *principal;
 138     *principal = NULL;
 139
 140     if (KRB_PRINC_LENGTH(name->krbPrincipal) > 1) {
 141         name->flags |= NAME_FLAG_SERVICE;
 142     } else {
 143         name->flags |= NAME_FLAG_NAI;
 144     }
 145
 146     *pName = name;
 147     *minor = 0;
 148
 149     return GSS_S_COMPLETE;
 150 }
 151
 152 static char *
 153 gssEapGetDefaultRealm(krb5_context krbContext)
 154 {
 155     char *defaultRealm = NULL;
 156
 157     krb5_appdefault_string(krbContext, "eap_gss",
 158                            NULL, "default_realm", "", &defaultRealm);
 159
 160     return defaultRealm;
 161 }
 162
 163 static OM_uint32
 164 importServiceName(OM_uint32 *minor,
 165                   const gss_buffer_t nameBuffer,
 166                   gss_name_t *pName)
 167 {
 168     OM_uint32 major;
 169     krb5_error_code code;
 170     krb5_context krbContext;
 171     krb5_principal krbPrinc;
 172     char *service, *host, *realm = NULL;
 173
 174     GSSEAP_KRB_INIT(&krbContext);
 175
 176     major = bufferToString(minor, nameBuffer, &service);
 177     if (GSS_ERROR(major))
 178         return major;
 179
 180     host = strchr(service, '@');
 181     if (host != NULL) {
 182         *host = '\0';
 183         host++;
 184     }
 185
 186     realm = gssEapGetDefaultRealm(krbContext);
 187
 188     code = krb5_build_principal(krbContext,
 189                                 &krbPrinc,
 190                                 realm != NULL ? strlen(realm) : 0,
 191                                 realm != NULL ? realm : "",
 192                                 service,
 193                                 host,
 194                                 NULL);
 195
 196     if (code == 0) {
 197         KRB_PRINC_TYPE(krbPrinc) = KRB5_NT_SRV_HST;
 198
 199         major = krbPrincipalToName(minor, &krbPrinc, pName);
 200         if (GSS_ERROR(major))
 201             krb5_free_principal(krbContext, krbPrinc);
 202     } else {
 203         major = GSS_S_FAILURE;
 204         *minor = GSSEAP_BAD_SERVICE_NAME;
 205     }
 206
 207     if (realm != NULL)
 208         GSSEAP_FREE(realm);
 209     GSSEAP_FREE(service);
 210
 211     return major;
 212 }
 213
 214 #define IMPORT_FLAG_DEFAULT_REALM           0x1
 215
 216 /*
 217  * Import an EAP name, possibly appending the default GSS EAP realm,
 218  */
 219 static OM_uint32
 220 importEapNameFlags(OM_uint32 *minor,
 221                    const gss_buffer_t nameBuffer,
 222                    OM_uint32 importFlags,
 223                    gss_name_t *pName)
 224 {
 225     OM_uint32 major;
 226     krb5_context krbContext;
 227     krb5_principal krbPrinc = NULL;
 228     krb5_error_code code;
 229
 230     GSSEAP_KRB_INIT(&krbContext);
 231
 232     if (nameBuffer == GSS_C_NO_BUFFER) {
 233         code = krb5_copy_principal(krbContext,
 234                                    krbAnonymousPrincipal(), &krbPrinc);
 235         if (code != 0) {
 236             *minor = code;
 237             return GSS_S_FAILURE;
 238         }
 239     } else {
 240         char *nameString;
 241
 242         major = bufferToString(minor, nameBuffer, &nameString);
 243         if (GSS_ERROR(major))
 244             return major;
 245
 246         /*
 247          * First, attempt to parse the name on the assumption that it includes
 248          * a qualifying realm. This allows us to avoid accidentally appending
 249          * the default Kerberos realm to an unqualified name. (A bug in MIT
 250          * Kerberos prevents the default realm being set to an empty value.)
 251          */
 252         code = krb5_parse_name_flags(krbContext, nameString,
 253                                      KRB5_PRINCIPAL_PARSE_REQUIRE_REALM, &krbPrinc);
 254         if (code == KRB5_PARSE_MALFORMED) {
 255             char *defaultRealm = NULL;
 256             int parseFlags = 0;
 257
 258             /* Possibly append the default EAP realm if required */
 259             if (importFlags & IMPORT_FLAG_DEFAULT_REALM)
 260                 defaultRealm = gssEapGetDefaultRealm(krbContext);
 261
 262             /* If no default realm, leave the realm empty in the parsed name */
 263             if (defaultRealm == NULL || defaultRealm[0] == '\0')
 264                 parseFlags |= KRB5_PRINCIPAL_PARSE_NO_REALM;
 265
 266             code = krb5_parse_name_flags(krbContext, nameString, parseFlags, &krbPrinc);
 267
 268 #ifdef HAVE_HEIMDAL_VERSION
 269             if (code == 0 && KRB_PRINC_REALM(krbPrinc) == NULL) {
 270                 KRB_PRINC_REALM(krbPrinc) = GSSEAP_CALLOC(1, sizeof(char));
 271                 if (KRB_PRINC_REALM(krbPrinc) == NULL)
 272                     code = ENOMEM;
 273             }
 274 #endif
 275
 276             if (defaultRealm != NULL)
 277                 GSSEAP_FREE(defaultRealm);
 278         }
 279
 280         GSSEAP_FREE(nameString);
 281
 282         if (code != 0) {
 283             *minor = code;
 284             return GSS_S_FAILURE;
 285         }
 286     }
 287
 288     assert(krbPrinc != NULL);
 289
 290     major = krbPrincipalToName(minor, &krbPrinc, pName);
 291     if (GSS_ERROR(major))
 292         krb5_free_principal(krbContext, krbPrinc);
 293
 294     return major;
 295 }
 296
 297 static OM_uint32
 298 importEapName(OM_uint32 *minor,
 299               const gss_buffer_t nameBuffer,
 300               gss_name_t *pName)
 301 {
 302     return importEapNameFlags(minor, nameBuffer, 0, pName);
 303 }
 304
 305 static OM_uint32
 306 importUserName(OM_uint32 *minor,
 307                const gss_buffer_t nameBuffer,
 308                gss_name_t *pName)
 309 {
 310     return importEapNameFlags(minor, nameBuffer, IMPORT_FLAG_DEFAULT_REALM, pName);
 311 }
 312
 313 static OM_uint32
 314 importAnonymousName(OM_uint32 *minor,
 315                     const gss_buffer_t nameBuffer GSSEAP_UNUSED,
 316                     gss_name_t *pName)
 317 {
 318     return importEapNameFlags(minor, GSS_C_NO_BUFFER, 0, pName);
 319 }
 320
 321 #define UPDATE_REMAIN(n)    do {            \
 322         p += (n);                           \
 323         remain -= (n);                      \
 324     } while (0)
 325
 326 #define CHECK_REMAIN(n)     do {        \
 327         if (remain < (n)) {             \
 328             major = GSS_S_BAD_NAME;     \
 329             *minor = GSSEAP_TOK_TRUNC;  \
 330             goto cleanup;               \
 331         }                               \
 332     } while (0)
 333
 334 OM_uint32
 335 gssEapImportNameInternal(OM_uint32 *minor,
 336                          const gss_buffer_t nameBuffer,
 337                          gss_name_t *pName,
 338                          unsigned int flags)
 339 {
 340     OM_uint32 major, tmpMinor;
 341     krb5_context krbContext;
 342     unsigned char *p;
 343     size_t len, remain;
 344     gss_buffer_desc buf;
 345     enum gss_eap_token_type tokType;
 346     gss_name_t name = GSS_C_NO_NAME;
 347     gss_OID mechanismUsed = GSS_C_NO_OID;
 348
 349     GSSEAP_KRB_INIT(&krbContext);
 350
 351     p = (unsigned char *)nameBuffer->value;
 352     remain = nameBuffer->length;
 353
 354     if (flags & EXPORT_NAME_FLAG_OID) {
 355         gss_OID_desc mech;
 356
 357         /* TOK_ID || MECH_OID_LEN || MECH_OID */
 358         if (remain < 6)
 359             return GSS_S_BAD_NAME;
 360
 361         if (flags & EXPORT_NAME_FLAG_COMPOSITE)
 362             tokType = TOK_TYPE_EXPORT_NAME_COMPOSITE;
 363         else
 364             tokType = TOK_TYPE_EXPORT_NAME;
 365
 366         /* TOK_ID */
 367         if (load_uint16_be(p) != tokType)
 368             return GSS_S_BAD_NAME;
 369         UPDATE_REMAIN(2);
 370
 371         /* MECH_OID_LEN */
 372         len = load_uint16_be(p);
 373         if (len < 2)
 374             return GSS_S_BAD_NAME;
 375         UPDATE_REMAIN(2);
 376
 377         /* MECH_OID */
 378         if (p[0] != 0x06)
 379             return GSS_S_BAD_NAME;
 380
 381         mech.length = p[1];
 382         mech.elements = &p[2];
 383
 384         CHECK_REMAIN(mech.length);
 385
 386         major = gssEapCanonicalizeOid(minor,
 387                                       &mech,
 388                                       OID_FLAG_FAMILY_MECH_VALID |
 389                                         OID_FLAG_MAP_FAMILY_MECH_TO_NULL,
 390                                       &mechanismUsed);
 391         if (GSS_ERROR(major))
 392             goto cleanup;
 393
 394         UPDATE_REMAIN(2 + mech.length);
 395     }
 396
 397     /* NAME_LEN */
 398     CHECK_REMAIN(4);
 399     len = load_uint32_be(p);
 400     UPDATE_REMAIN(4);
 401
 402     /* NAME */
 403     CHECK_REMAIN(len);
 404     buf.length = len;
 405     buf.value = p;
 406     UPDATE_REMAIN(len);
 407
 408     major = importEapNameFlags(minor, &buf, 0, &name);
 409     if (GSS_ERROR(major))
 410         goto cleanup;
 411
 412     name->mechanismUsed = mechanismUsed;
 413     mechanismUsed = GSS_C_NO_OID;
 414
 415     if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
 416         gss_buffer_desc buf;
 417
 418         buf.length = remain;
 419         buf.value = p;
 420
 421         major = gssEapImportAttrContext(minor, &buf, name);
 422         if (GSS_ERROR(major))
 423             goto cleanup;
 424     }
 425
 426     major = GSS_S_COMPLETE;
 427     *minor = 0;
 428
 429 cleanup:
 430     if (GSS_ERROR(major)) {
 431         gssEapReleaseOid(&tmpMinor, &mechanismUsed);
 432         gssEapReleaseName(&tmpMinor, &name);
 433     } else {
 434         *pName = name;
 435     }
 436
 437     return major;
 438 }
 439
 440 static OM_uint32
 441 importExportName(OM_uint32 *minor,
 442                  const gss_buffer_t nameBuffer,
 443                  gss_name_t *name)
 444 {
 445     return gssEapImportNameInternal(minor, nameBuffer, name,
 446                                     EXPORT_NAME_FLAG_OID);
 447 }
 448
 449 #ifdef HAVE_GSS_C_NT_COMPOSITE_EXPORT
 450 static OM_uint32
 451 importCompositeExportName(OM_uint32 *minor,
 452                           const gss_buffer_t nameBuffer,
 453                           gss_name_t *name)
 454 {
 455     return gssEapImportNameInternal(minor, nameBuffer, name,
 456                                     EXPORT_NAME_FLAG_OID |
 457                                     EXPORT_NAME_FLAG_COMPOSITE);
 458 }
 459 #endif
 460
 461 struct gss_eap_name_import_provider {
 462     gss_const_OID oid;
 463     OM_uint32 (*import)(OM_uint32 *, const gss_buffer_t, gss_name_t *);
 464 };
 465
 466 OM_uint32
 467 gssEapImportName(OM_uint32 *minor,
 468                  const gss_buffer_t nameBuffer,
 469                  const gss_OID nameType,
 470                  const gss_OID mechType,
 471                  gss_name_t *pName)
 472 {
 473     struct gss_eap_name_import_provider nameTypes[] = {
 474         { GSS_EAP_NT_EAP_NAME,              importEapName               },
 475         { GSS_C_NT_USER_NAME,               importUserName              },
 476         { GSS_C_NT_HOSTBASED_SERVICE,       importServiceName           },
 477         { GSS_C_NT_HOSTBASED_SERVICE_X,     importServiceName           },
 478         { GSS_C_NT_ANONYMOUS,               importAnonymousName         },
 479         { GSS_C_NT_EXPORT_NAME,             importExportName            },
 480         { GSS_KRB5_NT_PRINCIPAL_NAME,       importUserName              },
 481 #ifdef HAVE_GSS_C_NT_COMPOSITE_EXPORT
 482         { GSS_C_NT_COMPOSITE_EXPORT,        importCompositeExportName   },
 483 #endif
 484     };
 485     size_t i;
 486     OM_uint32 major = GSS_S_BAD_NAMETYPE;
 487     OM_uint32 tmpMinor;
 488     gss_name_t name = GSS_C_NO_NAME;
 489
 490     for (i = 0; i < sizeof(nameTypes) / sizeof(nameTypes[0]); i++) {
 491         if (oidEqual(nameTypes[i].oid,
 492                      nameType == GSS_C_NO_OID ? GSS_EAP_NT_EAP_NAME : nameType)) {
 493             major = nameTypes[i].import(minor, nameBuffer, &name);
 494             break;
 495         }
 496     }
 497
 498     if (major == GSS_S_COMPLETE &&
 499         mechType != GSS_C_NO_OID) {
 500         assert(gssEapIsConcreteMechanismOid(mechType));
 501         assert(name->mechanismUsed == GSS_C_NO_OID);
 502
 503         major = gssEapCanonicalizeOid(minor, mechType, 0, &name->mechanismUsed);
 504     }
 505
 506     if (GSS_ERROR(major))
 507         gssEapReleaseName(&tmpMinor, &name);
 508     else
 509         *pName = name;
 510
 511     return major;
 512 }
 513
 514 OM_uint32
 515 gssEapExportName(OM_uint32 *minor,
 516                  const gss_name_t name,
 517                  gss_buffer_t exportedName)
 518 {
 519     return gssEapExportNameInternal(minor, name, exportedName,
 520                                     EXPORT_NAME_FLAG_OID);
 521 }
 522
 523 OM_uint32
 524 gssEapExportNameInternal(OM_uint32 *minor,
 525                          const gss_name_t name,
 526                          gss_buffer_t exportedName,
 527                          unsigned int flags)
 528 {
 529     OM_uint32 major = GSS_S_FAILURE, tmpMinor;
 530     gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
 531     size_t exportedNameLen;
 532     unsigned char *p;
 533     gss_buffer_desc attrs = GSS_C_EMPTY_BUFFER;
 534     gss_OID mech;
 535
 536     exportedName->length = 0;
 537     exportedName->value = NULL;
 538
 539     if (name->mechanismUsed != GSS_C_NO_OID)
 540         mech = name->mechanismUsed;
 541     else
 542         mech = GSS_EAP_MECHANISM;
 543
 544     major = gssEapDisplayName(minor, name, &nameBuf, NULL);
 545     if (GSS_ERROR(major))
 546         goto cleanup;
 547
 548     exportedNameLen = 0;
 549     if (flags & EXPORT_NAME_FLAG_OID) {
 550         exportedNameLen += 6 + mech->length;
 551     }
 552     exportedNameLen += 4 + nameBuf.length;
 553     if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
 554         major = gssEapExportAttrContext(minor, name, &attrs);
 555         if (GSS_ERROR(major))
 556             goto cleanup;
 557         exportedNameLen += attrs.length;
 558     }
 559
 560     exportedName->value = GSSEAP_MALLOC(exportedNameLen);
 561     if (exportedName->value == NULL) {
 562         major = GSS_S_FAILURE;
 563         *minor = ENOMEM;
 564         goto cleanup;
 565     }
 566     exportedName->length = exportedNameLen;
 567
 568     p = (unsigned char *)exportedName->value;
 569
 570     if (flags & EXPORT_NAME_FLAG_OID) {
 571         /* TOK | MECH_OID_LEN */
 572         store_uint16_be((flags & EXPORT_NAME_FLAG_COMPOSITE)
 573                         ? TOK_TYPE_EXPORT_NAME_COMPOSITE
 574                         : TOK_TYPE_EXPORT_NAME,
 575                         p);
 576         p += 2;
 577         store_uint16_be(mech->length + 2, p);
 578         p += 2;
 579
 580         /* MECH_OID */
 581         *p++ = 0x06;
 582         *p++ = mech->length & 0xff;
 583         memcpy(p, mech->elements, mech->length);
 584         p += mech->length;
 585     }
 586
 587     /* NAME_LEN */
 588     store_uint32_be(nameBuf.length, p);
 589     p += 4;
 590
 591     /* NAME */
 592     memcpy(p, nameBuf.value, nameBuf.length);
 593     p += nameBuf.length;
 594
 595     if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
 596         memcpy(p, attrs.value, attrs.length);
 597         p += attrs.length;
 598     }
 599
 600     assert(p == (unsigned char *)exportedName->value + exportedNameLen);
 601
 602     major = GSS_S_COMPLETE;
 603     *minor = 0;
 604
 605 cleanup:
 606     gss_release_buffer(&tmpMinor, &attrs);
 607     gss_release_buffer(&tmpMinor, &nameBuf);
 608     if (GSS_ERROR(major))
 609         gss_release_buffer(&tmpMinor, exportedName);
 610
 611     return major;
 612 }
 613
 614 OM_uint32
 615 gssEapCanonicalizeName(OM_uint32 *minor,
 616                        const gss_name_t input_name,
 617                        const gss_OID mech_type,
 618                        gss_name_t *dest_name)
 619 {
 620     OM_uint32 major, tmpMinor;
 621     krb5_context krbContext;
 622     gss_name_t name;
 623     gss_OID mech_used;
 624
 625     if (input_name == GSS_C_NO_NAME) {
 626         *minor = EINVAL;
 627         return GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME;
 628     }
 629
 630     GSSEAP_KRB_INIT(&krbContext);
 631
 632     major = gssEapAllocName(minor, &name);
 633     if (GSS_ERROR(major)) {
 634         return major;
 635     }
 636
 637     if (mech_type != GSS_C_NO_OID)
 638         mech_used = mech_type;
 639     else
 640         mech_used = input_name->mechanismUsed;
 641
 642     major = gssEapCanonicalizeOid(minor,
 643                                   mech_used,
 644                                   OID_FLAG_NULL_VALID,
 645                                   &name->mechanismUsed);
 646     if (GSS_ERROR(major))
 647         goto cleanup;
 648
 649     name->flags = input_name->flags;
 650
 651     *minor = krb5_copy_principal(krbContext, input_name->krbPrincipal,
 652                                  &name->krbPrincipal);
 653     if (*minor != 0) {
 654         major = GSS_S_FAILURE;
 655         goto cleanup;
 656     }
 657
 658     if (input_name->attrCtx != NULL) {
 659         major = gssEapDuplicateAttrContext(minor, input_name, name);
 660         if (GSS_ERROR(major))
 661             goto cleanup;
 662     }
 663
 664     *dest_name = name;
 665
 666 cleanup:
 667     if (GSS_ERROR(major)) {
 668         gssEapReleaseName(&tmpMinor, &name);
 669     }
 670
 671     return major;
 672 }
 673
 674 OM_uint32
 675 gssEapDuplicateName(OM_uint32 *minor,
 676                     const gss_name_t input_name,
 677                     gss_name_t *dest_name)
 678 {
 679     return gssEapCanonicalizeName(minor, input_name,
 680                                   GSS_C_NO_OID, dest_name);
 681 }
 682
 683 OM_uint32
 684 gssEapDisplayName(OM_uint32 *minor,
 685                   gss_name_t name,
 686                   gss_buffer_t output_name_buffer,
 687                   gss_OID *output_name_type)
 688 {
 689     OM_uint32 major;
 690     krb5_context krbContext;
 691     char *krbName;
 692     gss_OID name_type;
 693     int flags = 0;
 694
 695     GSSEAP_KRB_INIT(&krbContext);
 696
 697     output_name_buffer->length = 0;
 698     output_name_buffer->value = NULL;
 699
 700     if (name == GSS_C_NO_NAME) {
 701         *minor = EINVAL;
 702         return GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME;
 703     }
 704
 705     /*
 706      * According to draft-ietf-abfab-gss-eap-01, when the realm is
 707      * absent the trailing '@' is not included.
 708      */
 709 #ifdef HAVE_HEIMDAL_VERSION
 710     if (KRB_PRINC_REALM(name->krbPrincipal) == NULL ||
 711         KRB_PRINC_REALM(name->krbPrincipal)[0] == '\0')
 712 #else
 713     if (KRB_PRINC_REALM(name->krbPrincipal)->length == 0)
 714 #endif
 715         flags |= KRB5_PRINCIPAL_UNPARSE_NO_REALM;
 716
 717     *minor = krb5_unparse_name_flags(krbContext, name->krbPrincipal,
 718                                      flags, &krbName);
 719     if (*minor != 0) {
 720         return GSS_S_FAILURE;
 721     }
 722
 723     major = makeStringBuffer(minor, krbName, output_name_buffer);
 724     if (GSS_ERROR(major)) {
 725         krb5_free_unparsed_name(krbContext, krbName);
 726         return major;
 727     }
 728
 729     krb5_free_unparsed_name(krbContext, krbName);
 730
 731     if (KRB_PRINC_TYPE(name->krbPrincipal) == KRB5_NT_WELLKNOWN &&
 732         krb5_principal_compare(krbContext,
 733                                name->krbPrincipal, krbAnonymousPrincipal())) {
 734         name_type = GSS_C_NT_ANONYMOUS;
 735     } else {
 736         name_type = GSS_EAP_NT_EAP_NAME;
 737     }
 738
 739     if (output_name_type != NULL)
 740         *output_name_type = name_type;
 741
 742     return GSS_S_COMPLETE;
 743 }
 744
 745 OM_uint32
 746 gssEapCompareName(OM_uint32 *minor,
 747                   gss_name_t name1,
 748                   gss_name_t name2,
 749                   int *name_equal)
 750 {
 751     krb5_context krbContext;
 752
 753     *minor = 0;
 754
 755     if (name1 == GSS_C_NO_NAME && name2 == GSS_C_NO_NAME) {
 756         *name_equal = 1;
 757     } else if (name1 != GSS_C_NO_NAME && name2 != GSS_C_NO_NAME) {
 758         GSSEAP_KRB_INIT(&krbContext);
 759
 760         /* krbPrincipal is immutable, so lock not required */
 761         *name_equal = krb5_principal_compare(krbContext,
 762                                              name1->krbPrincipal,
 763                                              name2->krbPrincipal);
 764     }
 765
 766     return GSS_S_COMPLETE;
 767 }