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34 * General mechanism utility routines.
37 #include "gssapiP_eap.h"
40 * Mechanism and name types are taken from 1.3.6.1.5.5(mechanisms)
41 * assigned at http://www.iana.org/assignments/smi-numbers
46 * eap-aes128-cts-hmac-sha1-96(17)
47 * eap-aes256-cts-hmac-sha1-96(18)
49 * GSS_EAP_NT_EAP_NAME(1)
51 * Implementation-internal OIDs are taken from 1.3.6.1.4.1.5322(padl)
54 * inquireSecContextByOid(1)
56 * setSecContextOption(3)
62 * Note: the enctype-less OID is used as the mechanism OID in non-
63 * canonicalized exported names.
65 static gss_OID_desc gssEapMechOids[] = {
66 /* 1.3.6.1.5.5.15.1.1 */
67 { 8, "\x2B\x06\x01\x05\x05\x0f\x01\x01" },
68 /* 1.3.6.1.5.5.15.1.1.17 */
69 { 9, "\x2B\x06\x01\x05\x05\x0f\x01\x01\x11" },
70 /* 1.3.6.1.5.5.15.1.1.18 */
71 { 9, "\x2B\x06\x01\x05\x05\x0f\x01\x01\x12" },
74 gss_OID GSS_EAP_MECHANISM = &gssEapMechOids[0];
75 gss_OID GSS_EAP_AES128_CTS_HMAC_SHA1_96_MECHANISM = &gssEapMechOids[1];
76 gss_OID GSS_EAP_AES256_CTS_HMAC_SHA1_96_MECHANISM = &gssEapMechOids[2];
79 internalizeOid(const gss_OID oid,
80 gss_OID *const pInternalizedOid);
83 * Returns TRUE is the OID is a concrete mechanism OID, that is, one
84 * with a Kerberos enctype as the last element.
87 gssEapIsConcreteMechanismOid(const gss_OID oid)
89 return oid->length > GSS_EAP_MECHANISM->length &&
90 memcmp(oid->elements, GSS_EAP_MECHANISM->elements,
91 GSS_EAP_MECHANISM->length) == 0;
95 gssEapIsMechanismOid(const gss_OID oid)
97 return oid == GSS_C_NO_OID ||
98 oidEqual(oid, GSS_EAP_MECHANISM) ||
99 gssEapIsConcreteMechanismOid(oid);
103 * Validate that all elements are concrete mechanism OIDs.
106 gssEapValidateMechs(OM_uint32 *minor,
107 const gss_OID_set mechs)
113 if (mechs == GSS_C_NO_OID_SET) {
114 return GSS_S_COMPLETE;
117 for (i = 0; i < mechs->count; i++) {
118 gss_OID oid = &mechs->elements[i];
120 if (!gssEapIsConcreteMechanismOid(oid)) {
121 *minor = GSSEAP_WRONG_MECH;
122 return GSS_S_BAD_MECH;
126 return GSS_S_COMPLETE;
130 gssEapOidToEnctype(OM_uint32 *minor,
132 krb5_enctype *enctype)
137 major = decomposeOid(minor,
138 GSS_EAP_MECHANISM->elements,
139 GSS_EAP_MECHANISM->length,
142 if (major == GSS_S_COMPLETE)
149 gssEapEnctypeToOid(OM_uint32 *minor,
150 krb5_enctype enctype,
158 oid = (gss_OID)GSSEAP_MALLOC(sizeof(*oid));
161 return GSS_S_FAILURE;
164 oid->length = GSS_EAP_MECHANISM->length + 1;
165 oid->elements = GSSEAP_MALLOC(oid->length);
166 if (oid->elements == NULL) {
169 return GSS_S_FAILURE;
172 major = composeOid(minor,
173 GSS_EAP_MECHANISM->elements,
174 GSS_EAP_MECHANISM->length,
177 if (major == GSS_S_COMPLETE) {
178 internalizeOid(oid, pOid);
181 GSSEAP_FREE(oid->elements);
189 gssEapIndicateMechs(OM_uint32 *minor,
192 krb5_context krbContext;
194 krb5_enctype *etypes;
197 GSSEAP_KRB_INIT(&krbContext);
199 *minor = krb5_get_permitted_enctypes(krbContext, &etypes);
201 return GSS_S_FAILURE;
204 major = gss_create_empty_oid_set(minor, mechs);
205 if (GSS_ERROR(major)) {
210 for (i = 0; etypes[i] != ENCTYPE_NULL; i++) {
212 #ifndef HAVE_HEIMDAL_VERSION
216 /* XXX currently we aren't equipped to encode these enctypes */
217 if (etypes[i] < 0 || etypes[i] > 127)
220 major = gssEapEnctypeToOid(minor, etypes[i], &mechOid);
221 if (GSS_ERROR(major))
224 major = gss_add_oid_set_member(minor, mechOid, mechs);
225 if (GSS_ERROR(major))
228 #ifndef HAVE_HEIMDAL_VERSION
229 gss_release_oid(&tmpMinor, &mechOid);
240 gssEapDefaultMech(OM_uint32 *minor,
244 OM_uint32 major, tmpMinor;
246 major = gssEapIndicateMechs(minor, &mechs);
247 if (GSS_ERROR(major)) {
251 if (mechs->count == 0) {
252 gss_release_oid_set(&tmpMinor, &mechs);
253 return GSS_S_BAD_MECH;
256 if (!internalizeOid(&mechs->elements[0], oid)) {
257 /* don't double-free if we didn't internalize it */
258 mechs->elements[0].length = 0;
259 mechs->elements[0].elements = NULL;
262 gss_release_oid_set(&tmpMinor, &mechs);
265 return GSS_S_COMPLETE;
269 internalizeOid(const gss_OID oid,
270 gss_OID *const pInternalizedOid)
274 *pInternalizedOid = GSS_C_NO_OID;
277 i < sizeof(gssEapMechOids) / sizeof(gssEapMechOids[0]);
279 if (oidEqual(oid, &gssEapMechOids[i])) {
280 *pInternalizedOid = (const gss_OID)&gssEapMechOids[i];
285 if (*pInternalizedOid == GSS_C_NO_OID) {
286 if (oidEqual(oid, GSS_EAP_NT_EAP_NAME))
287 *pInternalizedOid = (const gss_OID)GSS_EAP_NT_EAP_NAME;
290 if (*pInternalizedOid == GSS_C_NO_OID) {
291 *pInternalizedOid = oid;
299 gssEapReleaseOid(OM_uint32 *minor, gss_OID *oid)
301 gss_OID internalizedOid = GSS_C_NO_OID;
305 if (internalizeOid(*oid, &internalizedOid)) {
306 /* OID was internalized, so we can mark it as "freed" */
308 return GSS_S_COMPLETE;
311 /* we don't know about this OID */
312 return GSS_S_CONTINUE_NEEDED;
316 gssEapCanonicalizeOid(OM_uint32 *minor,
324 major = GSS_S_COMPLETE;
326 *pOid = GSS_C_NULL_OID;
328 if (oid == GSS_C_NULL_OID) {
329 if ((flags & OID_FLAG_NULL_VALID) == 0) {
330 *minor = GSSEAP_WRONG_MECH;
331 return GSS_S_BAD_MECH;
332 } else if (flags & OID_FLAG_MAP_NULL_TO_DEFAULT_MECH) {
333 return gssEapDefaultMech(minor, pOid);
337 } else if (oidEqual(oid, GSS_EAP_MECHANISM)) {
338 if ((flags & OID_FLAG_FAMILY_MECH_VALID) == 0) {
339 *minor = GSSEAP_WRONG_MECH;
340 return GSS_S_BAD_MECH;
341 } else if (flags & OID_FLAG_MAP_FAMILY_MECH_TO_NULL) {
344 } else if (!gssEapIsConcreteMechanismOid(oid)) {
345 *minor = GSSEAP_WRONG_MECH;
346 return GSS_S_BAD_MECH;
350 if (!internalizeOid(oid, pOid))
351 major = duplicateOid(minor, oid, pOid);
357 static gss_buffer_desc gssEapSaslMechs[] = {
358 { sizeof("EAP") - 1, "EAP", }, /* not used */
359 { sizeof("EAP-AES128") - 1, "EAP-AES128" },
360 { sizeof("EAP-AES256") - 1, "EAP-AES256" },
364 gssEapOidToSaslName(const gss_OID oid)
368 for (i = 1; i < sizeof(gssEapMechOids)/sizeof(gssEapMechOids[0]); i++) {
369 if (oidEqual(&gssEapMechOids[i], oid))
370 return &gssEapSaslMechs[i];
373 return GSS_C_NO_BUFFER;
377 gssEapSaslNameToOid(const gss_buffer_t name)
381 for (i = 1; i < sizeof(gssEapSaslMechs)/sizeof(gssEapSaslMechs[0]); i++) {
382 if (bufferEqual(&gssEapSaslMechs[i], name))
383 return &gssEapMechOids[i];