summaryrefslogtreecommitdiff
path: root/source4/auth/gensec/gensec_gsskrb5.c
blob: 8fe1e0d2243501071dd2548abd5707ac35cf5ee4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
/* 
   Unix SMB/CIFS implementation.

   GSSAPI KRB5 backend for GENSEC
   
   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004
   Copyright (C) Stefan Metzmacher <metze@samba.org> 2005

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"
#include "system/kerberos.h"
#include "system/time.h"
#include "auth/kerberos/kerberos.h"
#include "auth/auth.h"

static const gss_OID_desc gensec_gss_krb5_mechanism_oid_desc =
			{9, (void *)discard_const_p(char, "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02")};

enum GENSEC_GSSKRB5_STATE {
	GENSEC_GSSKRB5_CLIENT_START,
	GENSEC_GSSKRB5_CLIENT_MUTUAL_AUTH,
	GENSEC_GSSKRB5_CLIENT_DCE_STYLE,
	GENSEC_GSSKRB5_DONE
};

struct gensec_gsskrb5_state {
	enum GENSEC_GSSKRB5_STATE state_position;
	gss_ctx_id_t gssapi_context;
	struct gss_channel_bindings_struct *input_chan_bindings;
	gss_name_t server_name;
	gss_name_t client_name;
	OM_uint32 want_flags, got_flags;
};

static int gensec_gsskrb5_destory(void *ptr) 
{
	struct gensec_gsskrb5_state *gensec_gsskrb5_state = ptr;
	OM_uint32 maj_stat, min_stat;

	if (gensec_gsskrb5_state->gssapi_context != GSS_C_NO_CONTEXT) {
		maj_stat = gss_delete_sec_context (&min_stat,
						   &gensec_gsskrb5_state->gssapi_context,
						   GSS_C_NO_BUFFER);
	}

	if (gensec_gsskrb5_state->server_name != GSS_C_NO_NAME) {
		maj_stat = gss_release_name(&min_stat, &gensec_gsskrb5_state->server_name);
	}
	if (gensec_gsskrb5_state->client_name != GSS_C_NO_NAME) {
		maj_stat = gss_release_name(&min_stat, &gensec_gsskrb5_state->client_name);
	}
	return 0;
}

static NTSTATUS gensec_gsskrb5_start(struct gensec_security *gensec_security)
{
	struct gensec_gsskrb5_state *gensec_gsskrb5_state;

	gensec_gsskrb5_state = talloc(gensec_security, struct gensec_gsskrb5_state);
	if (!gensec_gsskrb5_state) {
		return NT_STATUS_NO_MEMORY;
	}

	gensec_security->private_data = gensec_gsskrb5_state;

	gensec_gsskrb5_state->gssapi_context = GSS_C_NO_CONTEXT;
	gensec_gsskrb5_state->server_name = GSS_C_NO_NAME;
	gensec_gsskrb5_state->client_name = GSS_C_NO_NAME;

	talloc_set_destructor(gensec_gsskrb5_state, gensec_gsskrb5_destory); 

	/* TODO: Fill in channel bindings */
	gensec_gsskrb5_state->input_chan_bindings = GSS_C_NO_CHANNEL_BINDINGS;
	
	gensec_gsskrb5_state->want_flags = GSS_C_MUTUAL_FLAG;
	gensec_gsskrb5_state->got_flags = 0;

	if (gensec_security->want_features & GENSEC_FEATURE_SESSION_KEY) {
		/* GSSAPI won't give us the session keys */
		return NT_STATUS_INVALID_PARAMETER;
	}
	if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
		gensec_gsskrb5_state->want_flags |= GSS_C_INTEG_FLAG;
	}
	if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
		gensec_gsskrb5_state->want_flags |= GSS_C_CONF_FLAG;
	}
	if (gensec_security->want_features & GENSEC_FEATURE_DCE_STYLE) {
		gensec_gsskrb5_state->want_flags |= GSS_C_DCE_STYLE;
	}

	return NT_STATUS_OK;
}

static NTSTATUS gensec_gsskrb5_client_start(struct gensec_security *gensec_security)
{
	struct gensec_gsskrb5_state *gensec_gsskrb5_state;
	NTSTATUS nt_status;
	gss_buffer_desc name_token;
	OM_uint32 maj_stat, min_stat;

	gss_OID_desc hostbased = {10, 
				  (void *)discard_const_p(char, "\x2a\x86\x48\x86\xf7\x12"
							  "\x01\x02\x01\x04")};

	nt_status = gensec_gsskrb5_start(gensec_security);
	if (!NT_STATUS_IS_OK(nt_status)) {
		return nt_status;
	}

	gensec_gsskrb5_state = gensec_security->private_data;

	gensec_gsskrb5_state->state_position = GENSEC_GSSKRB5_CLIENT_START;

	name_token.value = talloc_asprintf(gensec_gsskrb5_state, "%s@%s", gensec_get_target_service(gensec_security), 
					   gensec_get_target_hostname(gensec_security));
	DEBUG(0, ("name: %s\n", (char *)name_token.value));
	name_token.length = strlen(name_token.value);

	maj_stat = gss_import_name (&min_stat,
				    &name_token,
				    &hostbased,
				    &gensec_gsskrb5_state->server_name);
	if (maj_stat) {
		return NT_STATUS_UNSUCCESSFUL;
	}

	return NT_STATUS_OK;
}

/**
 * Next state function for the GSSKRB5 GENSEC mechanism
 * 
 * @param gensec_gsskrb5_state GSSAPI State
 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
 * @param in The request, as a DATA_BLOB
 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent, 
 *                or NT_STATUS_OK if the user is authenticated. 
 */

static NTSTATUS gensec_gsskrb5_update(struct gensec_security *gensec_security, 
				   TALLOC_CTX *out_mem_ctx, 
				   const DATA_BLOB in, DATA_BLOB *out) 
{
	struct gensec_gsskrb5_state *gensec_gsskrb5_state = gensec_security->private_data;
	NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
	OM_uint32 maj_stat, min_stat;
	OM_uint32 min_stat2;
	gss_buffer_desc input_token, output_token;

	*out = data_blob(NULL, 0);

	input_token.length = in.length;
	input_token.value = in.data;

	switch (gensec_gsskrb5_state->state_position) {
	case GENSEC_GSSKRB5_CLIENT_START:
	{
		maj_stat = gss_init_sec_context(&min_stat, 
						GSS_C_NO_CREDENTIAL, 
						&gensec_gsskrb5_state->gssapi_context, 
						gensec_gsskrb5_state->server_name, 
						discard_const_p(gss_OID_desc, &gensec_gss_krb5_mechanism_oid_desc),
						gensec_gsskrb5_state->want_flags, 
						0, 
						gensec_gsskrb5_state->input_chan_bindings,
						&input_token, 
						NULL, 
						&output_token, 
						&gensec_gsskrb5_state->got_flags, /* ret flags */
						NULL);
		*out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
		if (out->length != output_token.length) {
			gss_release_buffer(&min_stat2, &output_token);
			return NT_STATUS_NO_MEMORY;
		}
		gss_release_buffer(&min_stat2, &output_token);

		if (maj_stat == GSS_S_COMPLETE) {
			gensec_gsskrb5_state->state_position = GENSEC_GSSKRB5_DONE;
			return NT_STATUS_OK;
		} else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
			gensec_gsskrb5_state->state_position = GENSEC_GSSKRB5_CLIENT_MUTUAL_AUTH;
			return NT_STATUS_MORE_PROCESSING_REQUIRED;
		} else {
			gss_buffer_desc msg1, msg2;
			OM_uint32 msg_ctx = 0;

			msg1.value = NULL;
			msg2.value = NULL;
			gss_display_status(&min_stat2, maj_stat, GSS_C_GSS_CODE,
					   GSS_C_NULL_OID, &msg_ctx, &msg1);
			gss_display_status(&min_stat2, min_stat, GSS_C_MECH_CODE,
					   GSS_C_NULL_OID, &msg_ctx, &msg2);
			DEBUG(1, ("gensec_gsskrb5_update: %s : %s\n", (char *)msg1.value, (char *)msg2.value));
			gss_release_buffer(&min_stat2, &msg1);
			gss_release_buffer(&min_stat2, &msg2);

			return nt_status;
		}
		break;
	}
	case GENSEC_GSSKRB5_CLIENT_MUTUAL_AUTH:
	{
		maj_stat = gss_init_sec_context(&min_stat, 
						GSS_C_NO_CREDENTIAL, 
						&gensec_gsskrb5_state->gssapi_context, 
						gensec_gsskrb5_state->server_name, 
						discard_const_p(gss_OID_desc, &gensec_gss_krb5_mechanism_oid_desc),
						gensec_gsskrb5_state->want_flags, 
						0, 
						gensec_gsskrb5_state->input_chan_bindings,
						&input_token, 
						NULL, 
						&output_token, 
						&gensec_gsskrb5_state->got_flags, /* ret flags */
						NULL);
		*out = data_blob_talloc(out_mem_ctx, output_token.value, output_token.length);
		if (out->length != output_token.length) {
			gss_release_buffer(&min_stat2, &output_token);
			return NT_STATUS_NO_MEMORY;
		}
		gss_release_buffer(&min_stat2, &output_token);

		if (maj_stat == GSS_S_COMPLETE) {
			if (gensec_gsskrb5_state->got_flags & GSS_C_DCE_STYLE) {
				gensec_gsskrb5_state->state_position = GENSEC_GSSKRB5_CLIENT_DCE_STYLE;
				return NT_STATUS_MORE_PROCESSING_REQUIRED;	
			}
			gensec_gsskrb5_state->state_position = GENSEC_GSSKRB5_DONE;
			return NT_STATUS_OK;
		} else if (maj_stat == GSS_S_CONTINUE_NEEDED) {
			gensec_gsskrb5_state->state_position = GENSEC_GSSKRB5_CLIENT_DCE_STYLE;
			return NT_STATUS_MORE_PROCESSING_REQUIRED;
		} else {
			gss_buffer_desc msg1, msg2;
			OM_uint32 msg_ctx = 0;

			msg1.value = NULL;
			msg2.value = NULL;
			gss_display_status(&min_stat2, maj_stat, GSS_C_GSS_CODE,
					   GSS_C_NULL_OID, &msg_ctx, &msg1);
			gss_display_status(&min_stat2, min_stat, GSS_C_MECH_CODE,
					   GSS_C_NULL_OID, &msg_ctx, &msg2);
			DEBUG(1, ("gensec_gsskrb5_update: %s : %s\n", (char *)msg1.value, (char *)msg2.value));
			gss_release_buffer(&min_stat2, &msg1);
			gss_release_buffer(&min_stat2, &msg2);

			return nt_status;
		}
		break;
	}
	case GENSEC_GSSKRB5_CLIENT_DCE_STYLE:
	{
		gensec_gsskrb5_state->state_position = GENSEC_GSSKRB5_DONE;
		return NT_STATUS_OK;
	}
	case GENSEC_GSSKRB5_DONE:
	{
		return NT_STATUS_OK;
	}
	default:
		return NT_STATUS_INVALID_PARAMETER;
	}

	return NT_STATUS_INVALID_PARAMETER;
}

static NTSTATUS gensec_gsskrb5_wrap(struct gensec_security *gensec_security, 
				   TALLOC_CTX *mem_ctx, 
				   const DATA_BLOB *in, 
				   DATA_BLOB *out)
{
	struct gensec_gsskrb5_state *gensec_gsskrb5_state = gensec_security->private_data;
	OM_uint32 maj_stat, min_stat;
	gss_buffer_desc input_token, output_token;
	int conf_state;
	input_token.length = in->length;
	input_token.value = in->data;

	maj_stat = gss_wrap(&min_stat, 
			    gensec_gsskrb5_state->gssapi_context, 
			    gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
			    GSS_C_QOP_DEFAULT,
			    &input_token,
			    &conf_state,
			    &output_token);
	if (GSS_ERROR(maj_stat)) {
		return NT_STATUS_ACCESS_DENIED;
	}
	*out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);

	gss_release_buffer(&min_stat, &output_token);

	if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
	    && !conf_state) {
		return NT_STATUS_ACCESS_DENIED;
	}
	return NT_STATUS_OK;
}

static NTSTATUS gensec_gsskrb5_unwrap(struct gensec_security *gensec_security, 
				     TALLOC_CTX *mem_ctx, 
				     const DATA_BLOB *in, 
				     DATA_BLOB *out)
{
	struct gensec_gsskrb5_state *gensec_gsskrb5_state = gensec_security->private_data;
	OM_uint32 maj_stat, min_stat;
	gss_buffer_desc input_token, output_token;
	int conf_state;
	gss_qop_t qop_state;
	input_token.length = in->length;
	input_token.value = in->data;
	
	maj_stat = gss_unwrap(&min_stat, 
			      gensec_gsskrb5_state->gssapi_context, 
			      &input_token,
			      &output_token, 
			      &conf_state,
			      &qop_state);
	if (GSS_ERROR(maj_stat)) {
		return NT_STATUS_ACCESS_DENIED;
	}
	*out = data_blob_talloc(mem_ctx, output_token.value, output_token.length);

	gss_release_buffer(&min_stat, &output_token);
	
	if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
	    && !conf_state) {
		return NT_STATUS_ACCESS_DENIED;
	}
	return NT_STATUS_OK;
}

static size_t gensec_gsskrb5_sig_size(struct gensec_security *gensec_security) 
{
	/* not const but work for DCERPC packets and arcfour */
	return 45;
}

static NTSTATUS gensec_gsskrb5_seal_packet(struct gensec_security *gensec_security, 
					  TALLOC_CTX *mem_ctx, 
					  uint8_t *data, size_t length, 
					  const uint8_t *whole_pdu, size_t pdu_length, 
					  DATA_BLOB *sig)
{
	struct gensec_gsskrb5_state *gensec_gsskrb5_state = gensec_security->private_data;
	OM_uint32 maj_stat, min_stat;
	gss_buffer_desc input_token, output_token;
	int conf_state;
	ssize_t sig_length = 0;

	input_token.length = length;
	input_token.value = data;
	
	maj_stat = gss_wrap(&min_stat, 
			    gensec_gsskrb5_state->gssapi_context,
			    gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL),
			    GSS_C_QOP_DEFAULT,
			    &input_token,
			    &conf_state,
			    &output_token);
	if (GSS_ERROR(maj_stat)) {
		return NT_STATUS_ACCESS_DENIED;
	}

	if (output_token.length < length) {
		return NT_STATUS_INTERNAL_ERROR;
	}

	sig_length = 45;

	memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);
	*sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);

DEBUG(0,("gensec_gsskrb5_seal_packet: siglen: %d inlen: %d, wrap_len: %d\n", sig->length, length, output_token.length - sig_length));
dump_data(0,sig->data, sig->length);
dump_data(0,data, length);
dump_data(0,((uint8_t *)output_token.value) + sig_length, output_token.length - sig_length);

	gss_release_buffer(&min_stat, &output_token);

	if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
	    && !conf_state) {
		return NT_STATUS_ACCESS_DENIED;
	}
	return NT_STATUS_OK;
}

static NTSTATUS gensec_gsskrb5_unseal_packet(struct gensec_security *gensec_security, 
					    TALLOC_CTX *mem_ctx, 
					    uint8_t *data, size_t length, 
					    const uint8_t *whole_pdu, size_t pdu_length,
					    const DATA_BLOB *sig)
{
	struct gensec_gsskrb5_state *gensec_gsskrb5_state = gensec_security->private_data;
	OM_uint32 maj_stat, min_stat;
	gss_buffer_desc input_token, output_token;
	int conf_state;
	gss_qop_t qop_state;
	DATA_BLOB in;

DEBUG(0,("gensec_gsskrb5_unseal_packet: siglen: %d\n", sig->length));
dump_data(0,sig->data, sig->length);

	in = data_blob_talloc(mem_ctx, NULL, sig->length + length);

	memcpy(in.data, sig->data, sig->length);
	memcpy(in.data + sig->length, data, length);

	input_token.length = in.length;
	input_token.value = in.data;
	
	maj_stat = gss_unwrap(&min_stat, 
			      gensec_gsskrb5_state->gssapi_context, 
			      &input_token,
			      &output_token, 
			      &conf_state,
			      &qop_state);
	if (GSS_ERROR(maj_stat)) {
		return NT_STATUS_ACCESS_DENIED;
	}

	if (output_token.length != length) {
		return NT_STATUS_INTERNAL_ERROR;
	}

	memcpy(data, output_token.value, length);

	gss_release_buffer(&min_stat, &output_token);
	
	if (gensec_have_feature(gensec_security, GENSEC_FEATURE_SEAL)
	    && !conf_state) {
		return NT_STATUS_ACCESS_DENIED;
	}
	return NT_STATUS_OK;
}

static NTSTATUS gensec_gsskrb5_sign_packet(struct gensec_security *gensec_security, 
					  TALLOC_CTX *mem_ctx, 
					  const uint8_t *data, size_t length, 
					  const uint8_t *whole_pdu, size_t pdu_length, 
					  DATA_BLOB *sig)
{
	struct gensec_gsskrb5_state *gensec_gsskrb5_state = gensec_security->private_data;
	OM_uint32 maj_stat, min_stat;
	gss_buffer_desc input_token, output_token;
	int conf_state;
	ssize_t sig_length = 0;

	input_token.length = length;
	input_token.value = data;

	maj_stat = gss_wrap(&min_stat, 
			    gensec_gsskrb5_state->gssapi_context,
			    0,
			    GSS_C_QOP_DEFAULT,
			    &input_token,
			    &conf_state,
			    &output_token);
	if (GSS_ERROR(maj_stat)) {
		return NT_STATUS_ACCESS_DENIED;
	}

	if (output_token.length < length) {
		return NT_STATUS_INTERNAL_ERROR;
	}

	sig_length = 45;

	/*memcpy(data, ((uint8_t *)output_token.value) + sig_length, length);*/
	*sig = data_blob_talloc(mem_ctx, (uint8_t *)output_token.value, sig_length);

DEBUG(0,("gensec_gsskrb5_sign_packet: siglen: %d\n", sig->length));
dump_data(0,sig->data, sig->length);

	gss_release_buffer(&min_stat, &output_token);

	return NT_STATUS_OK;
}

static NTSTATUS gensec_gsskrb5_check_packet(struct gensec_security *gensec_security, 
					   TALLOC_CTX *mem_ctx, 
					   const uint8_t *data, size_t length, 
					   const uint8_t *whole_pdu, size_t pdu_length, 
					   const DATA_BLOB *sig)
{
	struct gensec_gsskrb5_state *gensec_gsskrb5_state = gensec_security->private_data;
	OM_uint32 maj_stat, min_stat;
	gss_buffer_desc input_token, output_token;
	int conf_state;
	gss_qop_t qop_state;
	DATA_BLOB in;

DEBUG(0,("gensec_gsskrb5_check_packet: siglen: %d\n", sig->length));
dump_data(0,sig->data, sig->length);

	in = data_blob_talloc(mem_ctx, NULL, sig->length + length);

	memcpy(in.data, sig->data, sig->length);
	memcpy(in.data + sig->length, data, length);

	input_token.length = in.length;
	input_token.value = in.data;
	
	maj_stat = gss_unwrap(&min_stat, 
			      gensec_gsskrb5_state->gssapi_context, 
			      &input_token,
			      &output_token, 
			      &conf_state,
			      &qop_state);
	if (GSS_ERROR(maj_stat)) {
		return NT_STATUS_ACCESS_DENIED;
	}

	if (output_token.length != length) {
		return NT_STATUS_INTERNAL_ERROR;
	}

	/*memcpy(data, output_token.value, length);*/

	gss_release_buffer(&min_stat, &output_token);

	return NT_STATUS_OK;
}

static BOOL gensec_gsskrb5_have_feature(struct gensec_security *gensec_security, 
				       uint32_t feature) 
{
	struct gensec_gsskrb5_state *gensec_gsskrb5_state = gensec_security->private_data;
	if (feature & GENSEC_FEATURE_SIGN) {
		return gensec_gsskrb5_state->got_flags & GSS_C_INTEG_FLAG;
	}
	if (feature & GENSEC_FEATURE_SEAL) {
		return gensec_gsskrb5_state->got_flags & GSS_C_CONF_FLAG;
	}
	return False;
}

static const struct gensec_security_ops gensec_gsskrb5_security_ops = {
	.name		= "gsskrb5",
	.auth_type	= DCERPC_AUTH_TYPE_KRB5,
	.oid            = GENSEC_OID_KERBEROS5,
	.client_start   = gensec_gsskrb5_client_start,
	.update 	= gensec_gsskrb5_update,
	.sig_size	= gensec_gsskrb5_sig_size,
	.sign_packet	= gensec_gsskrb5_sign_packet,
	.check_packet	= gensec_gsskrb5_check_packet,
	.seal_packet	= gensec_gsskrb5_seal_packet,
	.unseal_packet	= gensec_gsskrb5_unseal_packet,
	.wrap           = gensec_gsskrb5_wrap,
	.unwrap         = gensec_gsskrb5_unwrap,
	.have_feature   = gensec_gsskrb5_have_feature,
	.enabled        = False
};

NTSTATUS gensec_gsskrb5_init(void)
{
	NTSTATUS ret;

	ret = gensec_register(&gensec_gsskrb5_security_ops);
	if (!NT_STATUS_IS_OK(ret)) {
		DEBUG(0,("Failed to register '%s' gensec backend!\n",
			gensec_gsskrb5_security_ops.name));
		return ret;
	}

	return ret;
}