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33 #include "spnego/spnego_locl.h"
35 RCSID("$Id: compat.c 21866 2007-08-08 11:31:29Z lha $");
38 * Apparently Microsoft got the OID wrong, and used
39 * 1.2.840.48018.1.2.2 instead. We need both this and
40 * the correct Kerberos OID here in order to deal with
41 * this. Because this is manifest in SPNEGO only I'd
42 * prefer to deal with this here rather than inside the
45 gss_OID_desc _gss_spnego_mskrb_mechanism_oid_desc =
46 {9, (void *)"\x2a\x86\x48\x82\xf7\x12\x01\x02\x02"};
48 gss_OID_desc _gss_spnego_krb5_mechanism_oid_desc =
49 {9, (void *)"\x2a\x86\x48\x86\xf7\x12\x01\x02\x02"};
52 * Allocate a SPNEGO context handle
54 OM_uint32 _gss_spnego_alloc_sec_context (OM_uint32 * minor_status,
55 gss_ctx_id_t *context_handle)
59 ctx = calloc(1, sizeof(*ctx));
61 *minor_status = ENOMEM;
65 ctx->initiator_mech_types.len = 0;
66 ctx->initiator_mech_types.val = NULL;
67 ctx->preferred_mech_type = GSS_C_NO_OID;
68 ctx->negotiated_mech_type = GSS_C_NO_OID;
69 ctx->negotiated_ctx_id = GSS_C_NO_CONTEXT;
72 * Cache these so we can return them before returning
73 * GSS_S_COMPLETE, even if the mechanism has itself
77 ctx->mech_time_rec = 0;
78 ctx->mech_src_name = GSS_C_NO_NAME;
79 ctx->delegated_cred_id = GSS_C_NO_CREDENTIAL;
84 ctx->verified_mic = 0;
86 HEIMDAL_MUTEX_init(&ctx->ctx_id_mutex);
88 *context_handle = (gss_ctx_id_t)ctx;
90 return GSS_S_COMPLETE;
94 * Free a SPNEGO context handle. The caller must have acquired
95 * the lock before this is called.
97 OM_uint32 _gss_spnego_internal_delete_sec_context
98 (OM_uint32 *minor_status,
99 gss_ctx_id_t *context_handle,
100 gss_buffer_t output_token
104 OM_uint32 ret, minor;
108 if (context_handle == NULL) {
109 return GSS_S_NO_CONTEXT;
112 if (output_token != GSS_C_NO_BUFFER) {
113 output_token->length = 0;
114 output_token->value = NULL;
117 ctx = (gssspnego_ctx)*context_handle;
118 *context_handle = GSS_C_NO_CONTEXT;
121 return GSS_S_NO_CONTEXT;
124 if (ctx->initiator_mech_types.val != NULL)
125 free_MechTypeList(&ctx->initiator_mech_types);
127 _gss_spnego_release_cred(&minor, &ctx->delegated_cred_id);
129 gss_release_oid(&minor, &ctx->preferred_mech_type);
130 ctx->negotiated_mech_type = GSS_C_NO_OID;
132 gss_release_name(&minor, &ctx->target_name);
133 gss_release_name(&minor, &ctx->mech_src_name);
135 if (ctx->negotiated_ctx_id != GSS_C_NO_CONTEXT) {
136 ret = gss_delete_sec_context(minor_status,
137 &ctx->negotiated_ctx_id,
139 ctx->negotiated_ctx_id = GSS_C_NO_CONTEXT;
141 ret = GSS_S_COMPLETE;
144 HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
145 HEIMDAL_MUTEX_destroy(&ctx->ctx_id_mutex);
148 *context_handle = NULL;
154 * For compatability with the Windows SPNEGO implementation, the
155 * default is to ignore the mechListMIC unless CFX is used and
156 * a non-preferred mechanism was negotiated
160 _gss_spnego_require_mechlist_mic(OM_uint32 *minor_status,
164 gss_buffer_set_t buffer_set = GSS_C_NO_BUFFER_SET;
171 return GSS_S_COMPLETE;
174 if (ctx->require_mic) {
175 /* Acceptor requested it: mandatory to honour */
177 return GSS_S_COMPLETE;
181 * Check whether peer indicated implicit support for updated SPNEGO
182 * (eg. in the Kerberos case by using CFX)
184 if (gss_inquire_sec_context_by_oid(&minor, ctx->negotiated_ctx_id,
185 GSS_C_PEER_HAS_UPDATED_SPNEGO,
186 &buffer_set) == GSS_S_COMPLETE) {
188 gss_release_buffer_set(&minor, &buffer_set);
191 /* Safe-to-omit MIC rules follow */
193 if (gss_oid_equal(ctx->negotiated_mech_type, ctx->preferred_mech_type)) {
195 } else if (gss_oid_equal(ctx->negotiated_mech_type, &_gss_spnego_krb5_mechanism_oid_desc) &&
196 gss_oid_equal(ctx->preferred_mech_type, &_gss_spnego_mskrb_mechanism_oid_desc)) {
201 return GSS_S_COMPLETE;
205 add_mech_type(gss_OID mech_type,
206 int includeMSCompatOID,
207 MechTypeList *mechtypelist)
212 if (gss_oid_equal(mech_type, GSS_SPNEGO_MECHANISM))
215 if (includeMSCompatOID &&
216 gss_oid_equal(mech_type, &_gss_spnego_krb5_mechanism_oid_desc)) {
217 ret = der_get_oid(_gss_spnego_mskrb_mechanism_oid_desc.elements,
218 _gss_spnego_mskrb_mechanism_oid_desc.length,
223 ret = add_MechTypeList(mechtypelist, &mech);
224 free_MechType(&mech);
228 ret = der_get_oid(mech_type->elements, mech_type->length, &mech, NULL);
231 ret = add_MechTypeList(mechtypelist, &mech);
232 free_MechType(&mech);
238 _gss_spnego_indicate_mechtypelist (OM_uint32 *minor_status,
239 gss_name_t target_name,
240 OM_uint32 (*func)(gss_name_t, gss_OID),
241 int includeMSCompatOID,
242 const gssspnego_cred cred_handle,
243 MechTypeList *mechtypelist,
244 gss_OID *preferred_mech)
246 gss_OID_set supported_mechs = GSS_C_NO_OID_SET;
247 gss_OID first_mech = GSS_C_NO_OID;
251 mechtypelist->len = 0;
252 mechtypelist->val = NULL;
254 if (cred_handle != NULL) {
255 ret = gss_inquire_cred(minor_status,
256 cred_handle->negotiated_cred_id,
262 ret = gss_indicate_mechs(minor_status, &supported_mechs);
265 if (ret != GSS_S_COMPLETE) {
269 if (supported_mechs->count == 0) {
270 *minor_status = ENOENT;
271 gss_release_oid_set(minor_status, &supported_mechs);
272 return GSS_S_FAILURE;
275 ret = (*func)(target_name, GSS_KRB5_MECHANISM);
276 if (ret == GSS_S_COMPLETE) {
277 ret = add_mech_type(GSS_KRB5_MECHANISM,
281 first_mech = GSS_KRB5_MECHANISM;
283 ret = GSS_S_COMPLETE;
285 for (i = 0; i < supported_mechs->count; i++) {
287 if (gss_oid_equal(&supported_mechs->elements[i], GSS_SPNEGO_MECHANISM))
289 if (gss_oid_equal(&supported_mechs->elements[i], GSS_KRB5_MECHANISM))
292 subret = (*func)(target_name, &supported_mechs->elements[i]);
293 if (subret != GSS_S_COMPLETE)
296 ret = add_mech_type(&supported_mechs->elements[i],
304 if (first_mech == GSS_C_NO_OID)
305 first_mech = &supported_mechs->elements[i];
308 if (mechtypelist->len == 0) {
309 gss_release_oid_set(minor_status, &supported_mechs);
311 return GSS_S_BAD_MECH;
314 if (preferred_mech != NULL) {
315 ret = gss_duplicate_oid(minor_status, first_mech, preferred_mech);
316 if (ret != GSS_S_COMPLETE)
317 free_MechTypeList(mechtypelist);
319 gss_release_oid_set(minor_status, &supported_mechs);