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[unleashed.git] / usr / src / lib / libgss / g_accept_sec_context.c
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1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25 /*
26 * glue routine for gss_accept_sec_context
27 */
28
29 #include <mechglueP.h>
30 #include "gssapiP_generic.h"
31 #ifdef HAVE_STDLIB_H
32 #include <stdlib.h>
33 #endif
34 #include <string.h>
35 #include <errno.h>
36 #include <syslog.h>
37
38 #ifndef LEAN_CLIENT
39 static OM_uint32
40 val_acc_sec_ctx_args(
41 OM_uint32 *minor_status,
42 gss_ctx_id_t *context_handle,
43 gss_buffer_t input_token_buffer,
44 gss_name_t *src_name,
45 gss_OID *mech_type,
46 gss_buffer_t output_token,
47 gss_cred_id_t *d_cred)
48 {
49
50 /* Initialize outputs. */
51
52 if (minor_status != NULL)
53 *minor_status = 0;
54
55 if (src_name != NULL)
56 *src_name = GSS_C_NO_NAME;
57
58 if (mech_type != NULL)
59 *mech_type = GSS_C_NO_OID;
60
61 if (output_token != GSS_C_NO_BUFFER) {
62 output_token->length = 0;
63 output_token->value = NULL;
64 }
65
66 if (d_cred != NULL)
67 *d_cred = GSS_C_NO_CREDENTIAL;
68
69 /* Validate arguments. */
70
71 if (minor_status == NULL)
72 return (GSS_S_CALL_INACCESSIBLE_WRITE);
73
74 if (context_handle == NULL)
75 return (GSS_S_CALL_INACCESSIBLE_WRITE);
76
77 if (input_token_buffer == GSS_C_NO_BUFFER)
78 return (GSS_S_CALL_INACCESSIBLE_READ);
79
80 if (output_token == GSS_C_NO_BUFFER)
81 return (GSS_S_CALL_INACCESSIBLE_WRITE);
82
83 return (GSS_S_COMPLETE);
84 }
85
86 OM_uint32
87 gss_accept_sec_context(minor_status,
88 context_handle,
89 verifier_cred_handle,
90 input_token_buffer,
91 input_chan_bindings,
92 src_name,
93 mech_type,
94 output_token,
95 ret_flags,
96 time_rec,
97 d_cred)
98
99 OM_uint32 *minor_status;
100 gss_ctx_id_t *context_handle;
101 const gss_cred_id_t verifier_cred_handle;
102 const gss_buffer_t input_token_buffer;
103 const gss_channel_bindings_t input_chan_bindings;
104 gss_name_t *src_name;
105 gss_OID *mech_type;
106 gss_buffer_t output_token;
107 OM_uint32 *ret_flags;
108 OM_uint32 *time_rec;
109 gss_cred_id_t *d_cred; /* delegated cred handle */
110
111 {
112 OM_uint32 status, temp_status, t_minstat;
113 gss_union_ctx_id_t union_ctx_id;
114 gss_union_cred_t union_cred;
115 gss_cred_id_t input_cred_handle = GSS_C_NO_CREDENTIAL;
116 gss_cred_id_t tmp_d_cred = GSS_C_NO_CREDENTIAL;
117 gss_name_t internal_name = GSS_C_NO_NAME;
118 gss_name_t tmp_src_name = GSS_C_NO_NAME;
119 gss_OID_desc token_mech_type_desc;
120 gss_OID token_mech_type = &token_mech_type_desc;
121 OM_uint32 flags;
122 gss_mechanism mech;
123
124 status = val_acc_sec_ctx_args(minor_status,
125 context_handle,
126 input_token_buffer,
127 src_name,
128 mech_type,
129 output_token,
130 d_cred);
131 if (status != GSS_S_COMPLETE)
132 return (status);
133
134 /*
135 * if context_handle is GSS_C_NO_CONTEXT, allocate a union context
136 * descriptor to hold the mech type information as well as the
137 * underlying mechanism context handle. Otherwise, cast the
138 * value of *context_handle to the union context variable.
139 */
140
141 if (*context_handle == GSS_C_NO_CONTEXT) {
142
143 if (input_token_buffer == GSS_C_NO_BUFFER)
144 return (GSS_S_CALL_INACCESSIBLE_READ);
145
146 /* Get the token mech type */
147 status = __gss_get_mech_type(token_mech_type,
148 input_token_buffer);
149
150 if (status)
151 return (status);
152
153 status = GSS_S_FAILURE;
154 union_ctx_id = (gss_union_ctx_id_t)
155 malloc(sizeof (gss_union_ctx_id_desc));
156 if (!union_ctx_id)
157 return (GSS_S_FAILURE);
158
159 union_ctx_id->internal_ctx_id = GSS_C_NO_CONTEXT;
160 status = generic_gss_copy_oid(&t_minstat,
161 token_mech_type,
162 &union_ctx_id->mech_type);
163 if (status != GSS_S_COMPLETE) {
164 free(union_ctx_id);
165 return (status);
166 }
167
168 /* set the new context handle to caller's data */
169 *context_handle = (gss_ctx_id_t)union_ctx_id;
170 } else {
171 union_ctx_id = (gss_union_ctx_id_t)*context_handle;
172 token_mech_type = union_ctx_id->mech_type;
173 }
174
175 /*
176 * get the appropriate cred handle from the union cred struct.
177 * defaults to GSS_C_NO_CREDENTIAL if there is no cred, which will
178 * use the default credential.
179 */
180 union_cred = (gss_union_cred_t)verifier_cred_handle;
181 input_cred_handle = __gss_get_mechanism_cred(union_cred,
182 token_mech_type);
183
184 /*
185 * now select the approprate underlying mechanism routine and
186 * call it.
187 */
188
189 mech = __gss_get_mechanism(token_mech_type);
190 if (mech && mech->gss_accept_sec_context) {
191 status = mech->gss_accept_sec_context(
192 mech->context,
193 minor_status,
194 &union_ctx_id->internal_ctx_id,
195 input_cred_handle,
196 input_token_buffer,
197 input_chan_bindings,
198 &internal_name,
199 mech_type,
200 output_token,
201 &flags,
202 time_rec,
203 d_cred ? &tmp_d_cred : NULL);
204
205 /* If there's more work to do, keep going... */
206 if (status == GSS_S_CONTINUE_NEEDED)
207 return (GSS_S_CONTINUE_NEEDED);
208
209 /* if the call failed, return with failure */
210 if (status != GSS_S_COMPLETE) {
211 if (mech_type && (*mech_type != GSS_C_NULL_OID))
212 map_error_oid(minor_status, *mech_type);
213 else {
214 map_error(minor_status, mech);
215 }
216 goto error_out;
217 }
218
219
220 /*
221 * if src_name is non-NULL,
222 * convert internal_name into a union name equivalent
223 * First call the mechanism specific display_name()
224 * then call gss_import_name() to create
225 * the union name struct cast to src_name
226 * NB: __gss_convert_name_to_union_name will
227 * "consume" (free) the name.
228 */
229 if (internal_name != NULL) {
230 temp_status = __gss_convert_name_to_union_name(
231 &t_minstat, mech,
232 internal_name, &tmp_src_name);
233 if (temp_status != GSS_S_COMPLETE) {
234 *minor_status = t_minstat;
235 map_error(minor_status, mech);
236 if (output_token->length)
237 (void) gss_release_buffer(
238 &t_minstat,
239 output_token);
240 return (temp_status);
241 }
242 if (src_name != NULL) {
243 *src_name = tmp_src_name;
244 }
245 } else if (src_name != NULL) {
246 *src_name = GSS_C_NO_NAME;
247 }
248
249 /* Ensure we're returning correct creds format */
250 if ((flags & GSS_C_DELEG_FLAG) &&
251 tmp_d_cred != GSS_C_NO_CREDENTIAL) {
252 /*
253 * If we got back an OID different from the original
254 * token OID, assume the delegated_cred is already
255 * a proper union_cred and just return it. Don't
256 * try to re-wrap it. This is for SPNEGO or other
257 * pseudo-mechanisms.
258 */
259 if (*mech_type != GSS_C_NO_OID &&
260 token_mech_type != GSS_C_NO_OID &&
261 !g_OID_equal(*mech_type, token_mech_type)) {
262 *d_cred = tmp_d_cred;
263 } else {
264 gss_union_cred_t d_u_cred = NULL;
265
266 d_u_cred = malloc(sizeof (gss_union_cred_desc));
267 if (d_u_cred == NULL) {
268 status = GSS_S_FAILURE;
269 goto error_out;
270 }
271 (void) memset(d_u_cred, 0,
272 sizeof (gss_union_cred_desc));
273
274 d_u_cred->count = 1;
275
276 status = generic_gss_copy_oid(
277 &t_minstat,
278 *mech_type,
279 &d_u_cred->mechs_array);
280
281 if (status != GSS_S_COMPLETE) {
282 free(d_u_cred);
283 goto error_out;
284 }
285
286 d_u_cred->cred_array = malloc(
287 sizeof (gss_cred_id_t));
288 if (d_u_cred->cred_array != NULL) {
289 d_u_cred->cred_array[0] = tmp_d_cred;
290 } else {
291 free(d_u_cred);
292 status = GSS_S_FAILURE;
293 goto error_out;
294 }
295
296 if (status != GSS_S_COMPLETE) {
297 free(d_u_cred->cred_array);
298 free(d_u_cred);
299 goto error_out;
300 }
301
302 internal_name = GSS_C_NO_NAME;
303
304 d_u_cred->auxinfo.creation_time = time(0);
305 d_u_cred->auxinfo.time_rec = 0;
306
307 if (mech->gss_inquire_cred) {
308 status = mech->gss_inquire_cred(
309 mech->context,
310 minor_status,
311 tmp_d_cred,
312 &internal_name,
313 &d_u_cred->auxinfo.time_rec,
314 &d_u_cred->auxinfo.cred_usage,
315 NULL);
316 }
317
318 if (status != GSS_S_COMPLETE)
319 map_error(minor_status, mech);
320
321 if (internal_name != NULL) {
322 temp_status =
323 __gss_convert_name_to_union_name(
324 &t_minstat, mech,
325 internal_name, &tmp_src_name);
326 if (temp_status != GSS_S_COMPLETE) {
327 *minor_status = t_minstat;
328 map_error(minor_status, mech);
329 if (output_token->length)
330 (void) gss_release_buffer(
331 &t_minstat,
332 output_token);
333 free(d_u_cred->cred_array);
334 free(d_u_cred);
335 return (temp_status);
336 }
337 }
338
339 if (tmp_src_name != NULL) {
340 status = gss_display_name(
341 &t_minstat,
342 tmp_src_name,
343 &d_u_cred->auxinfo.name,
344 &d_u_cred->auxinfo.name_type);
345 }
346
347 *d_cred = (gss_cred_id_t)d_u_cred;
348 }
349 }
350 if (ret_flags != NULL) {
351 *ret_flags = flags;
352 }
353
354 if (src_name == NULL && tmp_src_name != NULL)
355 (void) gss_release_name(&t_minstat,
356 &tmp_src_name);
357 return (status);
358 } else {
359
360 status = GSS_S_BAD_MECH;
361 }
362
363 error_out:
364 if (union_ctx_id) {
365 if (union_ctx_id->mech_type) {
366 if (union_ctx_id->mech_type->elements)
367 free(union_ctx_id->mech_type->elements);
368 free(union_ctx_id->mech_type);
369 }
370 free(union_ctx_id);
371 *context_handle = GSS_C_NO_CONTEXT;
372 }
373
374 #if 0
375 /*
376 * Solaris Kerberos
377 * Don't release, it causes a problem with error token.
378 */
379 if (output_token->length)
380 (void) gss_release_buffer(&t_minstat, output_token);
381 #endif
382
383 if (src_name)
384 *src_name = GSS_C_NO_NAME;
385
386 if (tmp_src_name != GSS_C_NO_NAME)
387 (void) gss_release_buffer(&t_minstat,
388 (gss_buffer_t)tmp_src_name);
389
390 return (status);
391 }
392 #endif /* LEAN_CLIENT */
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