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33 * Portions Copyright 2009 by the Massachusetts Institute of Technology.
34 * All Rights Reserved.
36 * Export of this software from the United States of America may
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42 * distribute this software and its documentation for any purpose and
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52 * this software for any purpose. It is provided "as is" without express
53 * or implied warranty.
57 * Name utility routines.
60 #include "gssapiP_eap.h"
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"
67 gss_OID GSS_EAP_NT_EAP_NAME = &gssEapNtEapName;
70 gssEapAllocName(OM_uint32 *minor, gss_name_t *pName)
75 *pName = GSS_C_NO_NAME;
77 name = (gss_name_t)GSSEAP_CALLOC(1, sizeof(*name));
83 if (GSSEAP_MUTEX_INIT(&name->mutex) != 0) {
85 gssEapReleaseName(&tmpMinor, &name);
91 return GSS_S_COMPLETE;
95 gssEapReleaseName(OM_uint32 *minor, gss_name_t *pName)
98 krb5_context krbContext = NULL;
104 return GSS_S_COMPLETE;
108 if (name == GSS_C_NO_NAME) {
109 return GSS_S_COMPLETE;
112 GSSEAP_KRB_INIT(&krbContext);
113 krb5_free_principal(krbContext, name->krbPrincipal);
114 gssEapReleaseOid(&tmpMinor, &name->mechanismUsed);
115 #ifdef GSSEAP_ENABLE_ACCEPTOR
116 gssEapReleaseAttrContext(&tmpMinor, name);
119 GSSEAP_MUTEX_DESTROY(&name->mutex);
123 return GSS_S_COMPLETE;
127 krbPrincipalToName(OM_uint32 *minor,
128 krb5_principal *principal,
134 major = gssEapAllocName(minor, &name);
135 if (GSS_ERROR(major))
138 name->krbPrincipal = *principal;
141 if (KRB_PRINC_LENGTH(name->krbPrincipal) > 1) {
142 name->flags |= NAME_FLAG_SERVICE;
144 name->flags |= NAME_FLAG_NAI;
150 return GSS_S_COMPLETE;
154 gssEapGetDefaultRealm(krb5_context krbContext)
156 char *defaultRealm = NULL;
158 krb5_appdefault_string(krbContext, "eap_gss",
159 NULL, "default_realm", "", &defaultRealm);
165 importServiceName(OM_uint32 *minor,
166 const gss_buffer_t nameBuffer,
170 krb5_error_code code;
171 krb5_context krbContext;
172 krb5_principal krbPrinc;
173 char *service, *host, *realm = NULL;
175 GSSEAP_KRB_INIT(&krbContext);
177 major = bufferToString(minor, nameBuffer, &service);
178 if (GSS_ERROR(major))
181 host = strchr(service, '@');
187 realm = gssEapGetDefaultRealm(krbContext);
189 code = krb5_build_principal(krbContext,
191 realm != NULL ? strlen(realm) : 0,
192 realm != NULL ? realm : "",
198 KRB_PRINC_TYPE(krbPrinc) = KRB5_NT_SRV_HST;
200 major = krbPrincipalToName(minor, &krbPrinc, pName);
201 if (GSS_ERROR(major))
202 krb5_free_principal(krbContext, krbPrinc);
204 major = GSS_S_FAILURE;
205 *minor = GSSEAP_BAD_SERVICE_NAME;
210 GSSEAP_FREE(service);
215 #define IMPORT_FLAG_DEFAULT_REALM 0x1
218 * Import an EAP name, possibly appending the default GSS EAP realm,
221 importEapNameFlags(OM_uint32 *minor,
222 const gss_buffer_t nameBuffer,
223 OM_uint32 importFlags,
227 krb5_context krbContext;
228 krb5_principal krbPrinc = NULL;
229 krb5_error_code code;
232 GSSEAP_KRB_INIT(&krbContext);
234 if (nameBuffer == GSS_C_NO_BUFFER) {
236 code = KRB5_PARSE_MALFORMED;
238 major = bufferToString(minor, nameBuffer, &nameString);
239 if (GSS_ERROR(major))
243 * First, attempt to parse the name on the assumption that it includes
244 * a qualifying realm. This allows us to avoid accidentally appending
245 * the default Kerberos realm to an unqualified name. (A bug in MIT
246 * Kerberos prevents the default realm being set to an empty value.)
248 code = krb5_parse_name_flags(krbContext, nameString,
249 KRB5_PRINCIPAL_PARSE_REQUIRE_REALM, &krbPrinc);
252 if (code == KRB5_PARSE_MALFORMED) {
253 char *defaultRealm = NULL;
256 /* Possibly append the default EAP realm if required */
257 if (importFlags & IMPORT_FLAG_DEFAULT_REALM)
258 defaultRealm = gssEapGetDefaultRealm(krbContext);
260 /* If no default realm, leave the realm empty in the parsed name */
261 if (defaultRealm == NULL || defaultRealm[0] == '\0')
262 parseFlags |= KRB5_PRINCIPAL_PARSE_NO_REALM;
264 code = krb5_parse_name_flags(krbContext, nameString, parseFlags, &krbPrinc);
266 #ifdef HAVE_HEIMDAL_VERSION
267 if (code == 0 && KRB_PRINC_REALM(krbPrinc) == NULL) {
268 KRB_PRINC_REALM(krbPrinc) = GSSEAP_CALLOC(1, sizeof(char));
269 if (KRB_PRINC_REALM(krbPrinc) == NULL)
274 if (defaultRealm != NULL)
275 GSSEAP_FREE(defaultRealm);
278 if (nameBuffer != GSS_C_NO_BUFFER)
279 GSSEAP_FREE(nameString);
283 return GSS_S_FAILURE;
286 assert(krbPrinc != NULL);
288 major = krbPrincipalToName(minor, &krbPrinc, pName);
289 if (GSS_ERROR(major))
290 krb5_free_principal(krbContext, krbPrinc);
296 importEapName(OM_uint32 *minor,
297 const gss_buffer_t nameBuffer,
300 return importEapNameFlags(minor, nameBuffer, 0, pName);
304 importUserName(OM_uint32 *minor,
305 const gss_buffer_t nameBuffer,
308 return importEapNameFlags(minor, nameBuffer, IMPORT_FLAG_DEFAULT_REALM, pName);
312 importAnonymousName(OM_uint32 *minor,
313 const gss_buffer_t nameBuffer GSSEAP_UNUSED,
316 return importEapNameFlags(minor, GSS_C_NO_BUFFER, 0, pName);
319 #define UPDATE_REMAIN(n) do { \
324 #define CHECK_REMAIN(n) do { \
325 if (remain < (n)) { \
326 major = GSS_S_BAD_NAME; \
327 *minor = GSSEAP_TOK_TRUNC; \
333 gssEapImportNameInternal(OM_uint32 *minor,
334 const gss_buffer_t nameBuffer,
338 OM_uint32 major, tmpMinor;
339 krb5_context krbContext;
343 gss_name_t name = GSS_C_NO_NAME;
344 gss_OID mechanismUsed = GSS_C_NO_OID;
346 GSSEAP_KRB_INIT(&krbContext);
348 p = (unsigned char *)nameBuffer->value;
349 remain = nameBuffer->length;
351 if (flags & EXPORT_NAME_FLAG_OID) {
353 enum gss_eap_token_type tokType;
354 uint16_t wireTokType;
356 /* TOK_ID || MECH_OID_LEN || MECH_OID */
358 *minor = GSSEAP_BAD_NAME_TOKEN;
359 return GSS_S_BAD_NAME;
362 if (flags & EXPORT_NAME_FLAG_COMPOSITE)
363 tokType = TOK_TYPE_EXPORT_NAME_COMPOSITE;
365 tokType = TOK_TYPE_EXPORT_NAME;
368 wireTokType = load_uint16_be(p);
370 if ((flags & EXPORT_NAME_FLAG_ALLOW_COMPOSITE) &&
371 wireTokType == TOK_TYPE_EXPORT_NAME_COMPOSITE) {
372 tokType = TOK_TYPE_EXPORT_NAME_COMPOSITE;
373 flags |= EXPORT_NAME_FLAG_COMPOSITE;
376 if (wireTokType != tokType) {
377 *minor = GSSEAP_WRONG_TOK_ID;
378 return GSS_S_BAD_NAME;
383 len = load_uint16_be(p);
385 *minor = GSSEAP_BAD_NAME_TOKEN;
386 return GSS_S_BAD_NAME;
392 *minor = GSSEAP_BAD_NAME_TOKEN;
393 return GSS_S_BAD_NAME;
397 mech.elements = &p[2];
399 CHECK_REMAIN(mech.length);
401 major = gssEapCanonicalizeOid(minor,
403 OID_FLAG_FAMILY_MECH_VALID |
404 OID_FLAG_MAP_FAMILY_MECH_TO_NULL,
406 if (GSS_ERROR(major))
409 UPDATE_REMAIN(2 + mech.length);
414 len = load_uint32_be(p);
423 major = importEapNameFlags(minor, &buf, 0, &name);
424 if (GSS_ERROR(major))
427 name->mechanismUsed = mechanismUsed;
428 mechanismUsed = GSS_C_NO_OID;
430 if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
435 #ifdef GSSEAP_ENABLE_ACCEPTOR
436 major = gssEapImportAttrContext(minor, &buf, name);
438 major = GSS_S_UNAVAILABLE;
440 if (GSS_ERROR(major))
444 major = GSS_S_COMPLETE;
448 if (GSS_ERROR(major)) {
449 gssEapReleaseOid(&tmpMinor, &mechanismUsed);
450 gssEapReleaseName(&tmpMinor, &name);
459 importExportName(OM_uint32 *minor,
460 const gss_buffer_t nameBuffer,
463 return gssEapImportNameInternal(minor, nameBuffer, name,
464 EXPORT_NAME_FLAG_OID |
465 EXPORT_NAME_FLAG_ALLOW_COMPOSITE);
468 #ifdef HAVE_GSS_C_NT_COMPOSITE_EXPORT
470 importCompositeExportName(OM_uint32 *minor,
471 const gss_buffer_t nameBuffer,
474 return gssEapImportNameInternal(minor, nameBuffer, name,
475 EXPORT_NAME_FLAG_OID |
476 EXPORT_NAME_FLAG_COMPOSITE);
480 struct gss_eap_name_import_provider {
482 OM_uint32 (*import)(OM_uint32 *, const gss_buffer_t, gss_name_t *);
486 gssEapImportName(OM_uint32 *minor,
487 const gss_buffer_t nameBuffer,
488 const gss_OID nameType,
489 const gss_OID mechType,
492 struct gss_eap_name_import_provider nameTypes[] = {
493 { GSS_EAP_NT_EAP_NAME, importEapName },
494 { GSS_C_NT_USER_NAME, importUserName },
495 { GSS_C_NT_HOSTBASED_SERVICE, importServiceName },
496 { GSS_C_NT_HOSTBASED_SERVICE_X, importServiceName },
497 { GSS_C_NT_ANONYMOUS, importAnonymousName },
498 { GSS_C_NT_EXPORT_NAME, importExportName },
499 { GSS_KRB5_NT_PRINCIPAL_NAME, importUserName },
500 #ifdef HAVE_GSS_C_NT_COMPOSITE_EXPORT
501 { GSS_C_NT_COMPOSITE_EXPORT, importCompositeExportName },
505 OM_uint32 major = GSS_S_BAD_NAMETYPE;
507 gss_name_t name = GSS_C_NO_NAME;
509 for (i = 0; i < sizeof(nameTypes) / sizeof(nameTypes[0]); i++) {
510 if (oidEqual(nameTypes[i].oid,
511 nameType == GSS_C_NO_OID ? GSS_EAP_NT_EAP_NAME : nameType)) {
512 major = nameTypes[i].import(minor, nameBuffer, &name);
517 if (major == GSS_S_COMPLETE &&
518 mechType != GSS_C_NO_OID) {
519 assert(gssEapIsConcreteMechanismOid(mechType));
520 assert(name->mechanismUsed == GSS_C_NO_OID);
522 major = gssEapCanonicalizeOid(minor, mechType, 0, &name->mechanismUsed);
525 if (GSS_ERROR(major))
526 gssEapReleaseName(&tmpMinor, &name);
534 gssEapExportName(OM_uint32 *minor,
535 const gss_name_t name,
536 gss_buffer_t exportedName)
538 return gssEapExportNameInternal(minor, name, exportedName,
539 EXPORT_NAME_FLAG_OID);
543 gssEapExportNameInternal(OM_uint32 *minor,
544 const gss_name_t name,
545 gss_buffer_t exportedName,
548 OM_uint32 major = GSS_S_FAILURE, tmpMinor;
549 gss_buffer_desc nameBuf = GSS_C_EMPTY_BUFFER;
550 size_t exportedNameLen;
552 gss_buffer_desc attrs = GSS_C_EMPTY_BUFFER;
555 exportedName->length = 0;
556 exportedName->value = NULL;
558 if (name->mechanismUsed != GSS_C_NO_OID)
559 mech = name->mechanismUsed;
561 mech = GSS_EAP_MECHANISM;
563 major = gssEapDisplayName(minor, name, &nameBuf, NULL);
564 if (GSS_ERROR(major))
568 if (flags & EXPORT_NAME_FLAG_OID) {
569 exportedNameLen += 6 + mech->length;
571 exportedNameLen += 4 + nameBuf.length;
572 if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
573 #ifdef GSSEAP_ENABLE_ACCEPTOR
574 major = gssEapExportAttrContext(minor, name, &attrs);
576 major = GSS_S_UNAVAILABLE;
578 if (GSS_ERROR(major))
580 exportedNameLen += attrs.length;
583 exportedName->value = GSSEAP_MALLOC(exportedNameLen);
584 if (exportedName->value == NULL) {
585 major = GSS_S_FAILURE;
589 exportedName->length = exportedNameLen;
591 p = (unsigned char *)exportedName->value;
593 if (flags & EXPORT_NAME_FLAG_OID) {
594 /* TOK | MECH_OID_LEN */
595 store_uint16_be((flags & EXPORT_NAME_FLAG_COMPOSITE)
596 ? TOK_TYPE_EXPORT_NAME_COMPOSITE
597 : TOK_TYPE_EXPORT_NAME,
600 store_uint16_be(mech->length + 2, p);
605 *p++ = mech->length & 0xff;
606 memcpy(p, mech->elements, mech->length);
611 store_uint32_be(nameBuf.length, p);
615 memcpy(p, nameBuf.value, nameBuf.length);
618 if (flags & EXPORT_NAME_FLAG_COMPOSITE) {
619 memcpy(p, attrs.value, attrs.length);
623 assert(p == (unsigned char *)exportedName->value + exportedNameLen);
625 major = GSS_S_COMPLETE;
629 gss_release_buffer(&tmpMinor, &attrs);
630 gss_release_buffer(&tmpMinor, &nameBuf);
631 if (GSS_ERROR(major))
632 gss_release_buffer(&tmpMinor, exportedName);
638 gssEapCanonicalizeName(OM_uint32 *minor,
639 const gss_name_t input_name,
640 const gss_OID mech_type,
641 gss_name_t *dest_name)
643 OM_uint32 major, tmpMinor;
644 krb5_context krbContext;
648 if (input_name == GSS_C_NO_NAME) {
650 return GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME;
653 GSSEAP_KRB_INIT(&krbContext);
655 major = gssEapAllocName(minor, &name);
656 if (GSS_ERROR(major)) {
660 if (mech_type != GSS_C_NO_OID)
661 mech_used = mech_type;
663 mech_used = input_name->mechanismUsed;
665 major = gssEapCanonicalizeOid(minor,
668 &name->mechanismUsed);
669 if (GSS_ERROR(major))
672 name->flags = input_name->flags;
674 *minor = krb5_copy_principal(krbContext, input_name->krbPrincipal,
675 &name->krbPrincipal);
677 major = GSS_S_FAILURE;
681 if (input_name->attrCtx != NULL) {
682 #ifdef GSSEAP_ENABLE_ACCEPTOR
683 major = gssEapDuplicateAttrContext(minor, input_name, name);
685 major = GSS_S_UNAVAILABLE;
687 if (GSS_ERROR(major))
694 if (GSS_ERROR(major)) {
695 gssEapReleaseName(&tmpMinor, &name);
702 gssEapDuplicateName(OM_uint32 *minor,
703 const gss_name_t input_name,
704 gss_name_t *dest_name)
706 return gssEapCanonicalizeName(minor, input_name,
707 GSS_C_NO_OID, dest_name);
711 gssEapDisplayName(OM_uint32 *minor,
713 gss_buffer_t output_name_buffer,
714 gss_OID *output_name_type)
717 krb5_context krbContext;
722 GSSEAP_KRB_INIT(&krbContext);
724 output_name_buffer->length = 0;
725 output_name_buffer->value = NULL;
727 if (name == GSS_C_NO_NAME) {
729 return GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME;
733 * According to draft-ietf-abfab-gss-eap-01, when the realm is
734 * absent the trailing '@' is not included.
736 #ifdef HAVE_HEIMDAL_VERSION
737 if (KRB_PRINC_REALM(name->krbPrincipal) == NULL ||
738 KRB_PRINC_REALM(name->krbPrincipal)[0] == '\0')
740 if (KRB_PRINC_REALM(name->krbPrincipal)->length == 0)
742 flags |= KRB5_PRINCIPAL_UNPARSE_NO_REALM;
744 *minor = krb5_unparse_name_flags(krbContext, name->krbPrincipal,
747 return GSS_S_FAILURE;
750 major = makeStringBuffer(minor, krbName, output_name_buffer);
751 if (GSS_ERROR(major)) {
752 krb5_free_unparsed_name(krbContext, krbName);
756 krb5_free_unparsed_name(krbContext, krbName);
758 if (output_name_buffer->length == 0) {
759 name_type = GSS_C_NT_ANONYMOUS;
760 } else if (name->flags & NAME_FLAG_NAI) {
761 name_type = GSS_C_NT_USER_NAME;
763 name_type = GSS_EAP_NT_EAP_NAME;
766 if (output_name_type != NULL)
767 *output_name_type = name_type;
769 return GSS_S_COMPLETE;
773 gssEapCompareName(OM_uint32 *minor,
778 krb5_context krbContext;
782 if (name1 == GSS_C_NO_NAME && name2 == GSS_C_NO_NAME) {
784 } else if (name1 != GSS_C_NO_NAME && name2 != GSS_C_NO_NAME) {
785 GSSEAP_KRB_INIT(&krbContext);
787 /* krbPrincipal is immutable, so lock not required */
788 *name_equal = krb5_principal_compare(krbContext,
790 name2->krbPrincipal);
793 return GSS_S_COMPLETE;