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34 * General mechanism utility routines.
37 #include "gssapiP_eap.h"
40 * 1.3.6.1.4.1.5322(padl)
43 * eap-aes128-cts-hmac-sha1-96(17)
44 * eap-aes256-cts-hmac-sha1-96(18)
47 * inquireSecContextByOid(1)
49 * setSecContextOption(3)
55 * Note: the enctype-less OID is used as the mechanism OID in non-
56 * canonicalized exported names.
58 static gss_OID_desc gssEapMechOids[] = {
59 /* 1.3.6.1.4.1.5322.22.1 */
60 { 9, "\x2B\x06\x01\x04\x01\xA9\x4A\x16\x01" },
61 /* 1.3.6.1.4.1.5322.22.1.17 */
62 { 10, "\x2B\x06\x01\x04\x01\xA9\x4A\x16\x01\x11" },
63 /* 1.3.6.1.4.1.5322.22.1.18 */
64 { 10, "\x2B\x06\x01\x04\x01\xA9\x4A\x16\x01\x12" }
67 gss_OID GSS_EAP_MECHANISM = &gssEapMechOids[0];
68 gss_OID GSS_EAP_AES128_CTS_HMAC_SHA1_96_MECHANISM = &gssEapMechOids[1];
69 gss_OID GSS_EAP_AES256_CTS_HMAC_SHA1_96_MECHANISM = &gssEapMechOids[2];
72 internalizeOid(const gss_OID oid,
73 gss_OID *const pInternalizedOid);
76 * Returns TRUE is the OID is a concrete mechanism OID, that is, one
77 * with a Kerberos enctype as the last element.
80 gssEapIsConcreteMechanismOid(const gss_OID oid)
82 return oid->length > GSS_EAP_MECHANISM->length &&
83 memcmp(oid->elements, GSS_EAP_MECHANISM->elements,
84 GSS_EAP_MECHANISM->length) == 0;
88 gssEapIsMechanismOid(const gss_OID oid)
90 return oid == GSS_C_NO_OID ||
91 oidEqual(oid, GSS_EAP_MECHANISM) ||
92 gssEapIsConcreteMechanismOid(oid);
96 * Validate that all elements are concrete mechanism OIDs.
99 gssEapValidateMechs(OM_uint32 *minor,
100 const gss_OID_set mechs)
106 if (mechs == GSS_C_NO_OID_SET) {
107 return GSS_S_COMPLETE;
110 for (i = 0; i < mechs->count; i++) {
111 gss_OID oid = &mechs->elements[i];
113 if (!gssEapIsConcreteMechanismOid(oid)) {
114 *minor = GSSEAP_WRONG_MECH;
115 return GSS_S_BAD_MECH;
119 return GSS_S_COMPLETE;
123 gssEapOidToEnctype(OM_uint32 *minor,
125 krb5_enctype *enctype)
130 major = decomposeOid(minor,
131 GSS_EAP_MECHANISM->elements,
132 GSS_EAP_MECHANISM->length,
135 if (major == GSS_S_COMPLETE)
142 gssEapEnctypeToOid(OM_uint32 *minor,
143 krb5_enctype enctype,
151 oid = (gss_OID)GSSEAP_MALLOC(sizeof(*oid));
154 return GSS_S_FAILURE;
157 oid->length = GSS_EAP_MECHANISM->length + 1;
158 oid->elements = GSSEAP_MALLOC(oid->length);
159 if (oid->elements == NULL) {
162 return GSS_S_FAILURE;
165 major = composeOid(minor,
166 GSS_EAP_MECHANISM->elements,
167 GSS_EAP_MECHANISM->length,
170 if (major == GSS_S_COMPLETE) {
171 internalizeOid(oid, pOid);
174 GSSEAP_FREE(oid->elements);
182 gssEapIndicateMechs(OM_uint32 *minor,
185 krb5_context krbContext;
187 krb5_enctype *etypes;
190 GSSEAP_KRB_INIT(&krbContext);
192 *minor = krb5_get_permitted_enctypes(krbContext, &etypes);
194 return GSS_S_FAILURE;
197 major = gss_create_empty_oid_set(minor, mechs);
198 if (GSS_ERROR(major)) {
203 for (i = 0; etypes[i] != ENCTYPE_NULL; i++) {
205 #ifndef HAVE_HEIMDAL_VERSION
209 /* XXX currently we aren't equipped to encode these enctypes */
210 if (etypes[i] < 0 || etypes[i] > 127)
213 major = gssEapEnctypeToOid(minor, etypes[i], &mechOid);
214 if (GSS_ERROR(major))
217 major = gss_add_oid_set_member(minor, mechOid, mechs);
218 if (GSS_ERROR(major))
221 #ifndef HAVE_HEIMDAL_VERSION
222 gss_release_oid(&tmpMinor, &mechOid);
233 gssEapDefaultMech(OM_uint32 *minor,
237 OM_uint32 major, tmpMinor;
239 major = gssEapIndicateMechs(minor, &mechs);
240 if (GSS_ERROR(major)) {
244 if (mechs->count == 0) {
245 gss_release_oid_set(&tmpMinor, &mechs);
246 return GSS_S_BAD_MECH;
249 if (!internalizeOid(&mechs->elements[0], oid)) {
250 /* don't double-free if we didn't internalize it */
251 mechs->elements[0].length = 0;
252 mechs->elements[0].elements = NULL;
255 gss_release_oid_set(&tmpMinor, &mechs);
258 return GSS_S_COMPLETE;
262 internalizeOid(const gss_OID oid,
263 gss_OID *const pInternalizedOid)
267 *pInternalizedOid = GSS_C_NO_OID;
270 i < sizeof(gssEapMechOids) / sizeof(gssEapMechOids[0]);
272 if (oidEqual(oid, &gssEapMechOids[i])) {
273 *pInternalizedOid = (const gss_OID)&gssEapMechOids[i];
278 if (*pInternalizedOid == GSS_C_NO_OID) {
279 if (oidEqual(oid, GSS_EAP_NT_EAP_NAME))
280 *pInternalizedOid = (const gss_OID)GSS_EAP_NT_EAP_NAME;
283 if (*pInternalizedOid == GSS_C_NO_OID) {
284 *pInternalizedOid = oid;
292 gssEapReleaseOid(OM_uint32 *minor, gss_OID *oid)
294 gss_OID internalizedOid = GSS_C_NO_OID;
298 if (internalizeOid(*oid, &internalizedOid)) {
299 /* OID was internalized, so we can mark it as "freed" */
301 return GSS_S_COMPLETE;
304 /* we don't know about this OID */
305 return GSS_S_CONTINUE_NEEDED;
309 gssEapCanonicalizeOid(OM_uint32 *minor,
317 major = GSS_S_COMPLETE;
319 *pOid = GSS_C_NULL_OID;
321 if (oid == GSS_C_NULL_OID) {
322 if ((flags & OID_FLAG_NULL_VALID) == 0) {
323 *minor = GSSEAP_WRONG_MECH;
324 return GSS_S_BAD_MECH;
325 } else if (flags & OID_FLAG_MAP_NULL_TO_DEFAULT_MECH) {
326 return gssEapDefaultMech(minor, pOid);
330 } else if (oidEqual(oid, GSS_EAP_MECHANISM)) {
331 if ((flags & OID_FLAG_FAMILY_MECH_VALID) == 0) {
332 *minor = GSSEAP_WRONG_MECH;
333 return GSS_S_BAD_MECH;
334 } else if (flags & OID_FLAG_MAP_FAMILY_MECH_TO_NULL) {
337 } else if (!gssEapIsConcreteMechanismOid(oid)) {
338 *minor = GSSEAP_WRONG_MECH;
339 return GSS_S_BAD_MECH;
343 if (!internalizeOid(oid, pOid))
344 major = duplicateOid(minor, oid, pOid);
350 static gss_buffer_desc gssEapSaslMechs[] = {
351 { sizeof("EAP") - 1, "EAP", }, /* not used */
352 { sizeof("EAP-AES128") - 1, "EAP-AES128" },
353 { sizeof("EAP-AES256") - 1, "EAP-AES256" },
357 gssEapOidToSaslName(const gss_OID oid)
361 for (i = 1; i < sizeof(gssEapMechOids)/sizeof(gssEapMechOids[0]); i++) {
362 if (oidEqual(&gssEapMechOids[i], oid))
363 return &gssEapSaslMechs[i];
366 return GSS_C_NO_BUFFER;
370 gssEapSaslNameToOid(const gss_buffer_t name)
374 for (i = 1; i < sizeof(gssEapSaslMechs)/sizeof(gssEapSaslMechs[0]); i++) {
375 if (bufferEqual(&gssEapSaslMechs[i], name))
376 return &gssEapMechOids[i];