2 * Copyright (c) 2004, PADL Software Pty Ltd.
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33 #include "spnego/spnego_locl.h"
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;
83 ctx->verified_mic = 0;
85 HEIMDAL_MUTEX_init(&ctx->ctx_id_mutex);
87 *context_handle = (gss_ctx_id_t)ctx;
89 return GSS_S_COMPLETE;
93 * Free a SPNEGO context handle. The caller must have acquired
94 * the lock before this is called.
96 OM_uint32 _gss_spnego_internal_delete_sec_context
97 (OM_uint32 *minor_status,
98 gss_ctx_id_t *context_handle,
99 gss_buffer_t output_token
103 OM_uint32 ret, minor;
107 if (context_handle == NULL) {
108 return GSS_S_NO_CONTEXT;
111 if (output_token != GSS_C_NO_BUFFER) {
112 output_token->length = 0;
113 output_token->value = NULL;
116 ctx = (gssspnego_ctx)*context_handle;
117 *context_handle = GSS_C_NO_CONTEXT;
120 return GSS_S_NO_CONTEXT;
123 if (ctx->initiator_mech_types.val != NULL)
124 free_MechTypeList(&ctx->initiator_mech_types);
126 gss_release_oid(&minor, &ctx->preferred_mech_type);
127 ctx->negotiated_mech_type = GSS_C_NO_OID;
129 gss_release_name(&minor, &ctx->target_name);
130 gss_release_name(&minor, &ctx->mech_src_name);
132 if (ctx->negotiated_ctx_id != GSS_C_NO_CONTEXT) {
133 ret = gss_delete_sec_context(minor_status,
134 &ctx->negotiated_ctx_id,
136 ctx->negotiated_ctx_id = GSS_C_NO_CONTEXT;
138 ret = GSS_S_COMPLETE;
141 HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
142 HEIMDAL_MUTEX_destroy(&ctx->ctx_id_mutex);
145 *context_handle = NULL;
151 * For compatability with the Windows SPNEGO implementation, the
152 * default is to ignore the mechListMIC unless CFX is used and
153 * a non-preferred mechanism was negotiated
157 _gss_spnego_require_mechlist_mic(OM_uint32 *minor_status,
161 gss_buffer_set_t buffer_set = GSS_C_NO_BUFFER_SET;
168 return GSS_S_COMPLETE;
171 if (ctx->require_mic) {
172 /* Acceptor requested it: mandatory to honour */
174 return GSS_S_COMPLETE;
178 * Check whether peer indicated implicit support for updated SPNEGO
179 * (eg. in the Kerberos case by using CFX)
181 if (gss_inquire_sec_context_by_oid(&minor, ctx->negotiated_ctx_id,
182 GSS_C_PEER_HAS_UPDATED_SPNEGO,
183 &buffer_set) == GSS_S_COMPLETE) {
185 gss_release_buffer_set(&minor, &buffer_set);
188 /* Safe-to-omit MIC rules follow */
190 if (gss_oid_equal(ctx->negotiated_mech_type, ctx->preferred_mech_type)) {
192 } else if (gss_oid_equal(ctx->negotiated_mech_type, &_gss_spnego_krb5_mechanism_oid_desc) &&
193 gss_oid_equal(ctx->preferred_mech_type, &_gss_spnego_mskrb_mechanism_oid_desc)) {
198 return GSS_S_COMPLETE;
202 add_mech_type(gss_OID mech_type,
203 int includeMSCompatOID,
204 MechTypeList *mechtypelist)
209 if (gss_oid_equal(mech_type, GSS_SPNEGO_MECHANISM))
212 if (includeMSCompatOID &&
213 gss_oid_equal(mech_type, &_gss_spnego_krb5_mechanism_oid_desc)) {
214 ret = der_get_oid(_gss_spnego_mskrb_mechanism_oid_desc.elements,
215 _gss_spnego_mskrb_mechanism_oid_desc.length,
220 ret = add_MechTypeList(mechtypelist, &mech);
221 free_MechType(&mech);
225 ret = der_get_oid(mech_type->elements, mech_type->length, &mech, NULL);
228 ret = add_MechTypeList(mechtypelist, &mech);
229 free_MechType(&mech);
235 _gss_spnego_indicate_mechtypelist (OM_uint32 *minor_status,
236 gss_name_t target_name,
237 OM_uint32 (*func)(gss_name_t, gss_OID),
238 int includeMSCompatOID,
239 const gssspnego_cred cred_handle,
240 MechTypeList *mechtypelist,
241 gss_OID *preferred_mech)
243 gss_OID_set supported_mechs = GSS_C_NO_OID_SET;
244 gss_OID first_mech = GSS_C_NO_OID;
248 mechtypelist->len = 0;
249 mechtypelist->val = NULL;
251 if (cred_handle != NULL) {
252 ret = gss_inquire_cred(minor_status,
253 cred_handle->negotiated_cred_id,
259 ret = gss_indicate_mechs(minor_status, &supported_mechs);
262 if (ret != GSS_S_COMPLETE) {
266 if (supported_mechs->count == 0) {
267 *minor_status = ENOENT;
268 gss_release_oid_set(minor_status, &supported_mechs);
269 return GSS_S_FAILURE;
272 ret = (*func)(target_name, GSS_KRB5_MECHANISM);
273 if (ret == GSS_S_COMPLETE) {
274 ret = add_mech_type(GSS_KRB5_MECHANISM,
278 first_mech = GSS_KRB5_MECHANISM;
280 ret = GSS_S_COMPLETE;
282 for (i = 0; i < supported_mechs->count; i++) {
284 if (gss_oid_equal(&supported_mechs->elements[i], GSS_SPNEGO_MECHANISM))
286 if (gss_oid_equal(&supported_mechs->elements[i], GSS_KRB5_MECHANISM))
289 subret = (*func)(target_name, &supported_mechs->elements[i]);
290 if (subret != GSS_S_COMPLETE)
293 ret = add_mech_type(&supported_mechs->elements[i],
301 if (first_mech == GSS_C_NO_OID)
302 first_mech = &supported_mechs->elements[i];
305 if (mechtypelist->len == 0) {
306 gss_release_oid_set(minor_status, &supported_mechs);
308 return GSS_S_BAD_MECH;
311 if (preferred_mech != NULL) {
312 ret = gss_duplicate_oid(minor_status, first_mech, preferred_mech);
313 if (ret != GSS_S_COMPLETE)
314 free_MechTypeList(mechtypelist);
316 gss_release_oid_set(minor_status, &supported_mechs);