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 krb5_error_code
 153 gssEapGetDefaultRealm(krb5_context krbContext, char **defaultRealm)
 154 {
 155     *defaultRealm = NULL;
 156
 157     krb5_appdefault_string(krbContext, "eap_gss",
 158                            NULL, "default_realm", "", defaultRealm);
 159
 160     if (*defaultRealm != NULL && (*defaultRealm)[0] == '\0') {
 161         GSSEAP_FREE(*defaultRealm);
 162         *defaultRealm = NULL;
 163     }
 164
 165     return (*defaultRealm != NULL) ? 0 : KRB5_CONFIG_NODEFREALM;
 166 }
 167
 168 static OM_uint32
 169 importServiceName(OM_uint32 *minor,
 170                   const gss_buffer_t nameBuffer,
 171                   gss_name_t *pName)
 172 {
 173     OM_uint32 major;
 174     krb5_error_code code;
 175     krb5_context krbContext;
 176     krb5_principal krbPrinc;
 177     char *service, *host, *realm = NULL;
 178
 179     GSSEAP_KRB_INIT(&krbContext);
 180
 181     major = bufferToString(minor, nameBuffer, &service);
 182     if (GSS_ERROR(major))
 183         return major;
 184
 185     host = strchr(service, '@');
 186     if (host != NULL) {
 187         *host = '\0';
 188         host++;
 189     }
 190
 191     gssEapGetDefaultRealm(krbContext, &realm);
 192
 193     code = krb5_build_principal(krbContext,
 194                                 &krbPrinc,
 195                                 realm != NULL ? strlen(realm) : 0,
 196                                 realm != NULL ? realm : "",
 197                                 service,
 198                                 host,
 199                                 NULL);
 200
 201     if (code == 0) {
 202         KRB_PRINC_TYPE(krbPrinc) = KRB5_NT_SRV_HST;
 203
 204         major = krbPrincipalToName(minor, &krbPrinc, pName);
 205         if (GSS_ERROR(major))
 206             krb5_free_principal(krbContext, krbPrinc);
 207     } else {
 208         major = GSS_S_FAILURE;
 209         *minor = GSSEAP_BAD_SERVICE_NAME;
 210     }
 211
 212     if (realm != NULL)
 213         GSSEAP_FREE(realm);
 214     GSSEAP_FREE(service);
 215
 216     return major;
 217 }
 218
 219 static OM_uint32
 220 importUserName(OM_uint32 *minor,
 221                const gss_buffer_t nameBuffer,
 222                gss_name_t *pName)
 223 {
 224     OM_uint32 major;
 225     krb5_context krbContext;
 226     krb5_principal krbPrinc = NULL;
 227     krb5_error_code code;
 228
 229     GSSEAP_KRB_INIT(&krbContext);
 230
 231     if (nameBuffer == GSS_C_NO_BUFFER) {
 232         code = krb5_copy_principal(krbContext,
 233                                    krbAnonymousPrincipal(), &krbPrinc);
 234         if (code != 0) {
 235             *minor = code;
 236             return GSS_S_FAILURE;
 237         }
 238     } else {
 239         char *nameString;
 240
 241         major = bufferToString(minor, nameBuffer, &nameString);
 242         if (GSS_ERROR(major))
 243             return major;
 244
 245         /*
 246          * First, attempt to parse the name on the assumption that it includes
 247          * a qualifying realm.
 248          */
 249         code = krb5_parse_name_flags(krbContext, nameString,
 250                                      KRB5_PRINCIPAL_PARSE_REQUIRE_REALM, &krbPrinc);
 251         if (code == KRB5_PARSE_MALFORMED) {
 252             char *defaultRealm = NULL;
 253             int flags = 0;
 254
 255             /*
 256              * We need an explicit appdefaults check because, at least with MIT
 257              * Kerberos, setting the context realm to NULL will reset it to the
 258              * default Kerberos realm after the second call to get_default_realm.
 259              * We want to make sure that the default Kerberos realm does not end
 260              * up accidentally appended to an unqualified name.
 261              */
 262             gssEapGetDefaultRealm(krbContext, &defaultRealm);
 263
 264             if (defaultRealm == NULL)
 265                 flags |= KRB5_PRINCIPAL_PARSE_NO_REALM;
 266
 267             code = krb5_parse_name_flags(krbContext, nameString, flags, &krbPrinc);
 268
 269             if (defaultRealm != NULL)
 270                 GSSEAP_FREE(defaultRealm);
 271         }
 272
 273         GSSEAP_FREE(nameString);
 274
 275         if (code != 0) {
 276             *minor = code;
 277             return GSS_S_FAILURE;
 278         }
 279     }
 280
 281     assert(krbPrinc != NULL);
 282
 283     major = krbPrincipalToName(minor, &krbPrinc, pName);
 284     if (GSS_ERROR(major))
 285         krb5_free_principal(krbContext, krbPrinc);
 286
 287     return major;
 288 }
 289
 290 static OM_uint32
 291 importAnonymousName(OM_uint32 *minor,
 292                     const gss_buffer_t nameBuffer GSSEAP_UNUSED,
 293                     gss_name_t *pName)
 294 {
 295     OM_uint32 major;
 296     krb5_context krbContext;
 297     krb5_principal krbPrinc;
 298
 299     GSSEAP_KRB_INIT(&krbContext);
 300
 301     *minor = krb5_copy_principal(krbContext, krbAnonymousPrincipal(),
 302                                  &krbPrinc);
 303     if (*minor != 0)
 304         return GSS_S_FAILURE;
 305
 306     major = krbPrincipalToName(minor, &krbPrinc, pName);
 307     if (GSS_ERROR(major)) {
 308         krb5_free_principal(krbContext, krbPrinc);
 309     }
 310
 311     return major;
 312 }
 313
 314 #define UPDATE_REMAIN(n)    do {            \
 315         p += (n);                           \
 316         remain -= (n);                      \
 317     } while (0)
 318
 319 #define CHECK_REMAIN(n)     do {        \
 320         if (remain < (n)) {             \
 321             major = GSS_S_BAD_NAME;     \
 322             *minor = GSSEAP_TOK_TRUNC;  \
 323             goto cleanup;               \
 324         }                               \
 325     } while (0)
 326
 327 OM_uint32
 328 gssEapImportNameInternal(OM_uint32 *minor,
 329                          const gss_buffer_t nameBuffer,
 330                          gss_name_t *pName,
 331                          unsigned int flags)
 332 {
 333     OM_uint32 major, tmpMinor;
 334     krb5_context krbContext;
 335     unsigned char *p;
 336     size_t len, remain;
 337     gss_buffer_desc buf;
 338     enum gss_eap_token_type tokType;
 339     gss_name_t name = GSS_C_NO_NAME;
 340     gss_OID mechanismUsed = GSS_C_NO_OID;
 341
 342     GSSEAP_KRB_INIT(&krbContext);
 343
 344     p = (unsigned char *)nameBuffer->value;
 345     remain = nameBuffer->length;
 346
 347     if (flags & EXPORT_NAME_FLAG_OID) {
 348         gss_OID_desc mech;
 349
 350         /* TOK_ID || MECH_OID_LEN || MECH_OID */
 351         if (remain < 6)
 352             return GSS_S_BAD_NAME;
 353
 354         if (flags & EXPORT_NAME_FLAG_COMPOSITE)
 355             tokType = TOK_TYPE_EXPORT_NAME_COMPOSITE;
 356         else
 357             tokType = TOK_TYPE_EXPORT_NAME;
 358
 359         /* TOK_ID */
 360         if (load_uint16_be(p) != tokType)
 361             return GSS_S_BAD_NAME;
 362         UPDATE_REMAIN(2);
 363
 364         /* MECH_OID_LEN */
 365         len = load_uint16_be(p);
 366         if (len < 2)
 367             return GSS_S_BAD_NAME;
 368         UPDATE_REMAIN(2);
 369
 370         /* MECH_OID */
 371         if (p[0] != 0x06)
 372             return GSS_S_BAD_NAME;
 373
 374         mech.length = p[1];
 375         mech.elements = &p[2];
 376
 377         CHECK_REMAIN(mech.length);
 378
 379         major = gssEapCanonicalizeOid(minor,
 380                                       &mech,
 381                                       OID_FLAG_FAMILY_MECH_VALID |
 382                                         OID_FLAG_MAP_FAMILY_MECH_TO_NULL,
 383                                       &mechanismUsed);
 384         if (GSS_ERROR(major))
 385             goto cleanup;
 386
 387         UPDATE_REMAIN(2 + mech.length);
 388     }
 389
 390     /* NAME_LEN */
 391     CHECK_REMAIN(4);
 392     len = load_uint32_be(p);
 393     UPDATE_REMAIN(4);
 394
 395     /* NAME */
 396     CHECK_REMAIN(len);
 397     buf.length = len;
 398     buf.value = p;
 399     UPDATE_REMAIN(len);
 400
 401     major = importUserName(minor, &buf, &name);
 402     if (GSS_ERROR(major))
 403         goto cleanup;
 404
 405     name->mechanismUsed = mechanismUsed;
 406     mechanismUsed = GSS_C_NO_OID;
 407
 408     if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
 409         gss_buffer_desc buf;
 410
 411         buf.length = remain;
 412         buf.value = p;
 413
 414         major = gssEapImportAttrContext(minor, &buf, name);
 415         if (GSS_ERROR(major))
 416             goto cleanup;
 417     }
 418
 419     major = GSS_S_COMPLETE;
 420     *minor = 0;
 421
 422 cleanup:
 423     if (GSS_ERROR(major)) {
 424         gssEapReleaseOid(&tmpMinor, &mechanismUsed);
 425         gssEapReleaseName(&tmpMinor, &name);
 426     } else {
 427         *pName = name;
 428     }
 429
 430     return major;
 431 }
 432
 433 static OM_uint32
 434 importExportName(OM_uint32 *minor,
 435                  const gss_buffer_t nameBuffer,
 436                  gss_name_t *name)
 437 {
 438     return gssEapImportNameInternal(minor, nameBuffer, name,
 439                                     EXPORT_NAME_FLAG_OID);
 440 }
 441
 442 #ifdef HAVE_GSS_C_NT_COMPOSITE_EXPORT
 443 static OM_uint32
 444 importCompositeExportName(OM_uint32 *minor,
 445                           const gss_buffer_t nameBuffer,
 446                           gss_name_t *name)
 447 {
 448     return gssEapImportNameInternal(minor, nameBuffer, name,
 449                                     EXPORT_NAME_FLAG_OID |
 450                                     EXPORT_NAME_FLAG_COMPOSITE);
 451 }
 452 #endif
 453
 454 struct gss_eap_name_import_provider {
 455     gss_const_OID oid;
 456     OM_uint32 (*import)(OM_uint32 *, const gss_buffer_t, gss_name_t *);
 457 };
 458
 459 OM_uint32
 460 gssEapImportName(OM_uint32 *minor,
 461                  const gss_buffer_t nameBuffer,
 462                  const gss_OID nameType,
 463                  const gss_OID mechType,
 464                  gss_name_t *pName)
 465 {
 466     struct gss_eap_name_import_provider nameTypes[] = {
 467         { GSS_EAP_NT_EAP_NAME,              importUserName              },
 468         { GSS_C_NT_USER_NAME,               importUserName              },
 469         { GSS_C_NT_HOSTBASED_SERVICE,       importServiceName           },
 470         { GSS_C_NT_HOSTBASED_SERVICE_X,     importServiceName           },
 471         { GSS_C_NT_ANONYMOUS,               importAnonymousName         },
 472         { GSS_C_NT_EXPORT_NAME,             importExportName            },
 473         { GSS_KRB5_NT_PRINCIPAL_NAME,       importUserName              },
 474 #ifdef HAVE_GSS_C_NT_COMPOSITE_EXPORT
 475         { GSS_C_NT_COMPOSITE_EXPORT,        importCompositeExportName   },
 476 #endif
 477     };
 478     size_t i;
 479     OM_uint32 major = GSS_S_BAD_NAMETYPE;
 480     OM_uint32 tmpMinor;
 481     gss_name_t name = GSS_C_NO_NAME;
 482
 483     for (i = 0; i < sizeof(nameTypes) / sizeof(nameTypes[0]); i++) {
 484         if (oidEqual(nameTypes[i].oid,
 485                      nameType == GSS_C_NO_OID ? GSS_EAP_NT_EAP_NAME : nameType)) {
 486             major = nameTypes[i].import(minor, nameBuffer, &name);
 487             break;
 488         }
 489     }
 490
 491     if (major == GSS_S_COMPLETE &&
 492         mechType != GSS_C_NO_OID) {
 493         assert(gssEapIsConcreteMechanismOid(mechType));
 494         assert(name->mechanismUsed == GSS_C_NO_OID);
 495
 496         major = gssEapCanonicalizeOid(minor, mechType, 0, &name->mechanismUsed);
 497     }
 498
 499     if (GSS_ERROR(major))
 500         gssEapReleaseName(&tmpMinor, &name);
 501     else
 502         *pName = name;
 503
 504     return major;
 505 }
 506
 507 OM_uint32
 508 gssEapExportName(OM_uint32 *minor,
 509                  const gss_name_t name,
 510                  gss_buffer_t exportedName)
 511 {
 512     return gssEapExportNameInternal(minor, name, exportedName,
 513                                     EXPORT_NAME_FLAG_OID);
 514 }
 515
 516 OM_uint32
 517 gssEapExportNameInternal(OM_uint32 *minor,
 518                          const gss_name_t name,
 519                          gss_buffer_t exportedName,
 520                          unsigned int flags)
 521 {
 522     OM_uint32 major = GSS_S_FAILURE, tmpMinor;
 523     krb5_context krbContext;
 524     char *krbName = NULL;
 525     size_t krbNameLen, exportedNameLen;
 526     unsigned char *p;
 527     gss_buffer_desc attrs = GSS_C_EMPTY_BUFFER;
 528     gss_OID mech;
 529
 530     exportedName->length = 0;
 531     exportedName->value = NULL;
 532
 533     if (name->mechanismUsed != GSS_C_NO_OID)
 534         mech = name->mechanismUsed;
 535     else
 536         mech = GSS_EAP_MECHANISM;
 537
 538     GSSEAP_KRB_INIT(&krbContext);
 539
 540     *minor = krb5_unparse_name(krbContext, name->krbPrincipal, &krbName);
 541     if (*minor != 0) {
 542         major = GSS_S_FAILURE;
 543         goto cleanup;
 544     }
 545     krbNameLen = strlen(krbName);
 546
 547     exportedNameLen = 0;
 548     if (flags & EXPORT_NAME_FLAG_OID) {
 549         exportedNameLen += 6 + mech->length;
 550     }
 551     exportedNameLen += 4 + krbNameLen;
 552     if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
 553         major = gssEapExportAttrContext(minor, name, &attrs);
 554         if (GSS_ERROR(major))
 555             goto cleanup;
 556         exportedNameLen += attrs.length;
 557     }
 558
 559     exportedName->value = GSSEAP_MALLOC(exportedNameLen);
 560     if (exportedName->value == NULL) {
 561         major = GSS_S_FAILURE;
 562         *minor = ENOMEM;
 563         goto cleanup;
 564     }
 565     exportedName->length = exportedNameLen;
 566
 567     p = (unsigned char *)exportedName->value;
 568
 569     if (flags & EXPORT_NAME_FLAG_OID) {
 570         /* TOK | MECH_OID_LEN */
 571         store_uint16_be((flags & EXPORT_NAME_FLAG_COMPOSITE)
 572                         ? TOK_TYPE_EXPORT_NAME_COMPOSITE
 573                         : TOK_TYPE_EXPORT_NAME,
 574                         p);
 575         p += 2;
 576         store_uint16_be(mech->length + 2, p);
 577         p += 2;
 578
 579         /* MECH_OID */
 580         *p++ = 0x06;
 581         *p++ = mech->length & 0xff;
 582         memcpy(p, mech->elements, mech->length);
 583         p += mech->length;
 584     }
 585
 586     /* NAME_LEN */
 587     store_uint32_be(krbNameLen, p);
 588     p += 4;
 589
 590     /* NAME */
 591     memcpy(p, krbName, krbNameLen);
 592     p += krbNameLen;
 593
 594     if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
 595         memcpy(p, attrs.value, attrs.length);
 596         p += attrs.length;
 597     }
 598
 599     assert(p == (unsigned char *)exportedName->value + exportedNameLen);
 600
 601     major = GSS_S_COMPLETE;
 602     *minor = 0;
 603
 604 cleanup:
 605     gss_release_buffer(&tmpMinor, &attrs);
 606     if (GSS_ERROR(major))
 607         gss_release_buffer(&tmpMinor, exportedName);
 608     krb5_free_unparsed_name(krbContext, krbName);
 609
 610     return major;
 611 }
 612
 613 OM_uint32
 614 gssEapCanonicalizeName(OM_uint32 *minor,
 615                        const gss_name_t input_name,
 616                        const gss_OID mech_type,
 617                        gss_name_t *dest_name)
 618 {
 619     OM_uint32 major, tmpMinor;
 620     krb5_context krbContext;
 621     gss_name_t name;
 622     gss_OID mech_used;
 623
 624     if (input_name == GSS_C_NO_NAME) {
 625         *minor = EINVAL;
 626         return GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME;
 627     }
 628
 629     GSSEAP_KRB_INIT(&krbContext);
 630
 631     major = gssEapAllocName(minor, &name);
 632     if (GSS_ERROR(major)) {
 633         return major;
 634     }
 635
 636     if (mech_type != GSS_C_NO_OID)
 637         mech_used = mech_type;
 638     else
 639         mech_used = input_name->mechanismUsed;
 640
 641     major = gssEapCanonicalizeOid(minor,
 642                                   mech_used,
 643                                   OID_FLAG_NULL_VALID,
 644                                   &name->mechanismUsed);
 645     if (GSS_ERROR(major))
 646         goto cleanup;
 647
 648     name->flags = input_name->flags;
 649
 650     *minor = krb5_copy_principal(krbContext, input_name->krbPrincipal,
 651                                  &name->krbPrincipal);
 652     if (*minor != 0) {
 653         major = GSS_S_FAILURE;
 654         goto cleanup;
 655     }
 656
 657     if (input_name->attrCtx != NULL) {
 658         major = gssEapDuplicateAttrContext(minor, input_name, name);
 659         if (GSS_ERROR(major))
 660             goto cleanup;
 661     }
 662
 663     *dest_name = name;
 664
 665 cleanup:
 666     if (GSS_ERROR(major)) {
 667         gssEapReleaseName(&tmpMinor, &name);
 668     }
 669
 670     return major;
 671 }
 672
 673 OM_uint32
 674 gssEapDuplicateName(OM_uint32 *minor,
 675                     const gss_name_t input_name,
 676                     gss_name_t *dest_name)
 677 {
 678     return gssEapCanonicalizeName(minor, input_name,
 679                                   GSS_C_NO_OID, dest_name);
 680 }
 681
 682 OM_uint32
 683 gssEapDisplayName(OM_uint32 *minor,
 684                   gss_name_t name,
 685                   gss_buffer_t output_name_buffer,
 686                   gss_OID *output_name_type)
 687 {
 688     OM_uint32 major;
 689     krb5_context krbContext;
 690     char *krbName;
 691     gss_OID name_type;
 692
 693     GSSEAP_KRB_INIT(&krbContext);
 694
 695     output_name_buffer->length = 0;
 696     output_name_buffer->value = NULL;
 697
 698     if (name == GSS_C_NO_NAME) {
 699         *minor = EINVAL;
 700         return GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME;
 701     }
 702
 703     *minor = krb5_unparse_name(krbContext, name->krbPrincipal, &krbName);
 704     if (*minor != 0) {
 705         return GSS_S_FAILURE;
 706     }
 707
 708     major = makeStringBuffer(minor, krbName, output_name_buffer);
 709     if (GSS_ERROR(major)) {
 710         krb5_free_unparsed_name(krbContext, krbName);
 711         return major;
 712     }
 713
 714     krb5_free_unparsed_name(krbContext, krbName);
 715
 716     if (KRB_PRINC_TYPE(name->krbPrincipal) == KRB5_NT_WELLKNOWN &&
 717         krb5_principal_compare(krbContext,
 718                                name->krbPrincipal, krbAnonymousPrincipal())) {
 719         name_type = GSS_C_NT_ANONYMOUS;
 720     } else {
 721         name_type = GSS_EAP_NT_EAP_NAME;
 722     }
 723
 724     if (output_name_type != NULL)
 725         *output_name_type = name_type;
 726
 727     return GSS_S_COMPLETE;
 728 }