+++ /dev/null
-/*
- * Copyright (c) 2011, JANET(UK)
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither the name of JANET(UK) nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-/*
- * General mechanism utility routines.
- */
-
-#include "gssapiP_eap.h"
-
-/*
- * 1.3.6.1.4.1.5322(padl)
- * gssEap(22)
- * mechanisms(1)
- * eap-aes128-cts-hmac-sha1-96(17)
- * eap-aes256-cts-hmac-sha1-96(18)
- * nameTypes(2)
- * apiExtensions(3)
- * inquireSecContextByOid(1)
- * inquireCredByOid(2)
- * setSecContextOption(3)
- * setCredOption(4)
- * mechInvoke(5)
- */
-
-/*
- * Note: the enctype-less OID is used as the mechanism OID in non-
- * canonicalized exported names.
- */
-static gss_OID_desc gssEapMechOids[] = {
- /* 1.3.6.1.4.1.5322.22.1 */
- { 9, "\x2B\x06\x01\x04\x01\xA9\x4A\x16\x01" },
- /* 1.3.6.1.4.1.5322.22.1.17 */
- { 10, "\x2B\x06\x01\x04\x01\xA9\x4A\x16\x01\x11" },
- /* 1.3.6.1.4.1.5322.22.1.18 */
- { 10, "\x2B\x06\x01\x04\x01\xA9\x4A\x16\x01\x12" }
-};
-
-gss_OID GSS_EAP_MECHANISM = &gssEapMechOids[0];
-gss_OID GSS_EAP_AES128_CTS_HMAC_SHA1_96_MECHANISM = &gssEapMechOids[1];
-gss_OID GSS_EAP_AES256_CTS_HMAC_SHA1_96_MECHANISM = &gssEapMechOids[2];
-
-static int
-internalizeOid(const gss_OID oid,
- gss_OID *const pInternalizedOid);
-
-/*
- * Returns TRUE is the OID is a concrete mechanism OID, that is, one
- * with a Kerberos enctype as the last element.
- */
-int
-gssEapIsConcreteMechanismOid(const gss_OID oid)
-{
- return oid->length > GSS_EAP_MECHANISM->length &&
- memcmp(oid->elements, GSS_EAP_MECHANISM->elements,
- GSS_EAP_MECHANISM->length) == 0;
-}
-
-int
-gssEapIsMechanismOid(const gss_OID oid)
-{
- return oid == GSS_C_NO_OID ||
- oidEqual(oid, GSS_EAP_MECHANISM) ||
- gssEapIsConcreteMechanismOid(oid);
-}
-
-/*
- * Validate that all elements are concrete mechanism OIDs.
- */
-OM_uint32
-gssEapValidateMechs(OM_uint32 *minor,
- const gss_OID_set mechs)
-{
- int i;
-
- *minor = 0;
-
- if (mechs == GSS_C_NO_OID_SET) {
- return GSS_S_COMPLETE;
- }
-
- for (i = 0; i < mechs->count; i++) {
- gss_OID oid = &mechs->elements[i];
-
- if (!gssEapIsConcreteMechanismOid(oid)) {
- *minor = GSSEAP_WRONG_MECH;
- return GSS_S_BAD_MECH;
- }
- }
-
- return GSS_S_COMPLETE;
-}
-
-OM_uint32
-gssEapOidToEnctype(OM_uint32 *minor,
- const gss_OID oid,
- krb5_enctype *enctype)
-{
- OM_uint32 major;
- int suffix;
-
- major = decomposeOid(minor,
- GSS_EAP_MECHANISM->elements,
- GSS_EAP_MECHANISM->length,
- oid,
- &suffix);
- if (major == GSS_S_COMPLETE)
- *enctype = suffix;
-
- return major;
-}
-
-OM_uint32
-gssEapEnctypeToOid(OM_uint32 *minor,
- krb5_enctype enctype,
- gss_OID *pOid)
-{
- OM_uint32 major;
- gss_OID oid;
-
- *pOid = NULL;
-
- oid = (gss_OID)GSSEAP_MALLOC(sizeof(*oid));
- if (oid == NULL) {
- *minor = ENOMEM;
- return GSS_S_FAILURE;
- }
-
- oid->length = GSS_EAP_MECHANISM->length + 1;
- oid->elements = GSSEAP_MALLOC(oid->length);
- if (oid->elements == NULL) {
- *minor = ENOMEM;
- GSSEAP_FREE(oid);
- return GSS_S_FAILURE;
- }
-
- major = composeOid(minor,
- GSS_EAP_MECHANISM->elements,
- GSS_EAP_MECHANISM->length,
- enctype,
- oid);
- if (major == GSS_S_COMPLETE) {
- internalizeOid(oid, pOid);
- *pOid = oid;
- } else {
- GSSEAP_FREE(oid->elements);
- GSSEAP_FREE(oid);
- }
-
- return major;
-}
-
-OM_uint32
-gssEapIndicateMechs(OM_uint32 *minor,
- gss_OID_set *mechs)
-{
- krb5_context krbContext;
- OM_uint32 major, tmpMinor;
- krb5_enctype *etypes;
- int i;
-
- GSSEAP_KRB_INIT(&krbContext);
-
- *minor = krb5_get_permitted_enctypes(krbContext, &etypes);
- if (*minor != 0) {
- return GSS_S_FAILURE;
- }
-
- major = gss_create_empty_oid_set(minor, mechs);
- if (GSS_ERROR(major)) {
- GSSEAP_FREE(etypes);
- return major;
- }
-
- for (i = 0; etypes[i] != ENCTYPE_NULL; i++) {
- gss_OID mechOid;
-
- /* XXX currently we aren't equipped to encode these enctypes */
- if (etypes[i] < 0 || etypes[i] > 127)
- continue;
-
- major = gssEapEnctypeToOid(minor, etypes[i], &mechOid);
- if (GSS_ERROR(major))
- break;
-
- major = gss_add_oid_set_member(minor, mechOid, mechs);
- if (GSS_ERROR(major))
- break;
-
- gss_release_oid(&tmpMinor, &mechOid);
- }
-
- GSSEAP_FREE(etypes);
-
- *minor = 0;
- return major;
-}
-
-OM_uint32
-gssEapDefaultMech(OM_uint32 *minor,
- gss_OID *oid)
-{
- gss_OID_set mechs;
- OM_uint32 major, tmpMinor;
-
- major = gssEapIndicateMechs(minor, &mechs);
- if (GSS_ERROR(major)) {
- return major;
- }
-
- if (mechs->count == 0) {
- gss_release_oid_set(&tmpMinor, &mechs);
- return GSS_S_BAD_MECH;
- }
-
- if (!internalizeOid(&mechs->elements[0], oid)) {
- /* don't double-free if we didn't internalize it */
- mechs->elements[0].length = 0;
- mechs->elements[0].elements = NULL;
- }
-
- gss_release_oid_set(&tmpMinor, &mechs);
-
- *minor = 0;
- return GSS_S_COMPLETE;
-}
-
-static int
-internalizeOid(const gss_OID oid,
- gss_OID *const pInternalizedOid)
-{
- int i;
-
- *pInternalizedOid = GSS_C_NO_OID;
-
- for (i = 0;
- i < sizeof(gssEapMechOids) / sizeof(gssEapMechOids[0]);
- i++) {
- if (oidEqual(oid, &gssEapMechOids[i])) {
- *pInternalizedOid = (const gss_OID)&gssEapMechOids[i];
- break;
- }
- }
-
- if (*pInternalizedOid == GSS_C_NO_OID) {
- if (oidEqual(oid, GSS_EAP_NT_EAP_NAME))
- *pInternalizedOid = (const gss_OID)GSS_EAP_NT_EAP_NAME;
- }
-
- if (*pInternalizedOid == GSS_C_NO_OID) {
- *pInternalizedOid = oid;
- return 0;
- }
-
- return 1;
-}
-
-OM_uint32
-gssEapReleaseOid(OM_uint32 *minor, gss_OID *oid)
-{
- gss_OID internalizedOid = GSS_C_NO_OID;
-
- *minor = 0;
-
- if (internalizeOid(*oid, &internalizedOid)) {
- /* OID was internalized, so we can mark it as "freed" */
- *oid = GSS_C_NO_OID;
- return GSS_S_COMPLETE;
- }
-
- /* we don't know about this OID */
- return GSS_S_CONTINUE_NEEDED;
-}
-
-OM_uint32
-gssEapCanonicalizeOid(OM_uint32 *minor,
- const gss_OID oid,
- OM_uint32 flags,
- gss_OID *pOid)
-{
- OM_uint32 major;
- int mapToNull = 0;
-
- major = GSS_S_COMPLETE;
- *minor = 0;
- *pOid = GSS_C_NULL_OID;
-
- if (oid == GSS_C_NULL_OID) {
- if ((flags & OID_FLAG_NULL_VALID) == 0) {
- *minor = GSSEAP_WRONG_MECH;
- return GSS_S_BAD_MECH;
- } else if (flags & OID_FLAG_MAP_NULL_TO_DEFAULT_MECH) {
- return gssEapDefaultMech(minor, pOid);
- } else {
- mapToNull = 1;
- }
- } else if (oidEqual(oid, GSS_EAP_MECHANISM)) {
- if ((flags & OID_FLAG_FAMILY_MECH_VALID) == 0) {
- *minor = GSSEAP_WRONG_MECH;
- return GSS_S_BAD_MECH;
- } else if (flags & OID_FLAG_MAP_FAMILY_MECH_TO_NULL) {
- mapToNull = 1;
- }
- } else if (!gssEapIsConcreteMechanismOid(oid)) {
- *minor = GSSEAP_WRONG_MECH;
- return GSS_S_BAD_MECH;
- }
-
- if (!mapToNull) {
- if (!internalizeOid(oid, pOid))
- major = duplicateOid(minor, oid, pOid);
- }
-
- return major;
-}
-
-static gss_buffer_desc gssEapSaslMechs[] = {
- { sizeof("EAP") - 1, "EAP", }, /* not used */
- { sizeof("EAP-AES128") - 1, "EAP-AES128" },
- { sizeof("EAP-AES256") - 1, "EAP-AES256" },
-};
-
-gss_buffer_t
-gssEapOidToSaslName(const gss_OID oid)
-{
- size_t i;
-
- for (i = 1; i < sizeof(gssEapMechOids)/sizeof(gssEapMechOids[0]); i++) {
- if (oidEqual(&gssEapMechOids[i], oid))
- return &gssEapSaslMechs[i];
- }
-
- return GSS_C_NO_BUFFER;
-}
-
-gss_OID
-gssEapSaslNameToOid(const gss_buffer_t name)
-{
- size_t i;
-
- for (i = 1; i < sizeof(gssEapSaslMechs)/sizeof(gssEapSaslMechs[0]); i++) {
- if (bufferEqual(&gssEapSaslMechs[i], name))
- return &gssEapMechOids[i];
- }
-
- return GSS_C_NO_OID;
-}
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