summaryrefslogtreecommitdiff
path: root/source3/rpc_client/cli_pipe.c
blob: 8711ab116eef31f148d4c213e43f8320878a0007 (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
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232

/* 
 *  Unix SMB/Netbios implementation.
 *  Version 1.9.
 *  RPC Pipe client / server routines
 *  Copyright (C) Andrew Tridgell              1992-1998,
 *  Copyright (C) Luke Kenneth Casson Leighton 1996-1998,
 *  Copyright (C) Paul Ashton                       1998.
 *  Copyright (C) Jeremy Allison                    1999.
 *  
 *  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.
 */


#ifdef SYSLOG
#undef SYSLOG
#endif

#include "includes.h"

extern int DEBUGLEVEL;
extern struct pipe_id_info pipe_names[];
extern fstring global_myworkgroup;
extern pstring global_myname;

/********************************************************************
 Rpc pipe call id.
 ********************************************************************/

static uint32 get_rpc_call_id(void)
{
	static uint32 call_id = 0;
	return ++call_id;
}

/*******************************************************************
 Use SMBreadX to get rest of one fragment's worth of rpc data.
 ********************************************************************/

static BOOL rpc_read(struct cli_state *cli, prs_struct *rdata, uint32 data_to_read, uint32 *rdata_offset)
{
	size_t size = (size_t)cli->max_recv_frag;
	int stream_offset = 0;
	int num_read;
	char *pdata;
	uint32 err;
	int extra_data_size = ((int)*rdata_offset) + ((int)data_to_read) - (int)prs_data_size(rdata);

	DEBUG(5,("rpc_read: data_to_read: %u rdata offset: %u extra_data_size: %d\n",
		(int)data_to_read, (unsigned int)*rdata_offset, extra_data_size));

	/*
	 * Grow the buffer if needed to accommodate the data to be read.
	 */

	if (extra_data_size > 0) {
		if(!prs_force_grow(rdata, (uint32)extra_data_size)) {
			DEBUG(0,("rpc_read: Failed to grow parse struct by %d bytes.\n", extra_data_size ));
			return False;
		}
		DEBUG(5,("rpc_read: grew buffer by %d bytes to %u\n", extra_data_size, prs_data_size(rdata) ));
	}

	pdata = prs_data_p(rdata) + *rdata_offset;

	do /* read data using SMBreadX */
	{
		if (size > (size_t)data_to_read)
			size = (size_t)data_to_read;

		num_read = (int)cli_read(cli, cli->nt_pipe_fnum, pdata, (off_t)stream_offset, size);

		DEBUG(5,("rpc_read: num_read = %d, read offset: %d, to read: %d\n",
		          num_read, stream_offset, data_to_read));

		if (cli_error(cli, NULL, &err, NULL)) {
			DEBUG(0,("rpc_read: Error %u in cli_read\n", (unsigned int)err ));
			return False;
		}

		data_to_read -= num_read;
		stream_offset += num_read;
		pdata += num_read;

	} while (num_read > 0 && data_to_read > 0);
	/* && err == (0x80000000 | STATUS_BUFFER_OVERFLOW)); */

	/*
	 * Update the current offset into rdata by the amount read.
	 */
	*rdata_offset += stream_offset;

	return True;
}

/****************************************************************************
 Checks the header.
 ****************************************************************************/

static BOOL rpc_check_hdr(prs_struct *rdata, RPC_HDR *rhdr, 
                          BOOL *first, BOOL *last, uint32 *len)
{
	DEBUG(5,("rpc_check_hdr: rdata->data_size = %u\n", (uint32)prs_data_size(rdata) ));

	if(!smb_io_rpc_hdr("rpc_hdr   ", rhdr, rdata, 0)) {
		DEBUG(0,("rpc_check_hdr: Failed to unmarshall RPC_HDR.\n"));
		return False;
	}

	if (prs_offset(rdata) != RPC_HEADER_LEN) {
		DEBUG(0,("rpc_check_hdr: offset was %x, should be %x.\n", prs_offset(rdata), RPC_HEADER_LEN));
		return False;
	}

	(*first) = IS_BITS_SET_ALL(rhdr->flags, RPC_FLG_FIRST);
	(*last) = IS_BITS_SET_ALL(rhdr->flags, RPC_FLG_LAST );
	(*len) = (uint32)rhdr->frag_len - prs_data_size(rdata);

	return (rhdr->pkt_type != RPC_FAULT);
}

static void NTLMSSPcalc_ap( struct cli_state *cli, unsigned char *data, uint32 len)
{
	unsigned char *hash = cli->ntlmssp_hash;
	unsigned char index_i = hash[256];
	unsigned char index_j = hash[257];
	int ind;

	for( ind = 0; ind < len; ind++) {
		unsigned char tc;
		unsigned char t;

		index_i++;
		index_j += hash[index_i];

		tc = hash[index_i];
		hash[index_i] = hash[index_j];
		hash[index_j] = tc;

		t = hash[index_i] + hash[index_j];
		data[ind] = data[ind] ^ hash[t];
	}

	hash[256] = index_i;
	hash[257] = index_j;
}

/****************************************************************************
 Verify data on an rpc pipe.
 The VERIFY & SEAL code is only executed on packets that look like this :

 Request/Response PDU's look like the following...

 |<------------------PDU len----------------------------------------------->|
 |<-HDR_LEN-->|<--REQ LEN------>|.............|<-AUTH_HDRLEN->|<-AUTH_LEN-->|

 +------------+-----------------+-------------+---------------+-------------+
 | RPC HEADER | REQ/RESP HEADER | DATA ...... | AUTH_HDR      | AUTH DATA   |
 +------------+-----------------+-------------+---------------+-------------+

 Never on bind requests/responses.
 ****************************************************************************/

static BOOL rpc_auth_pipe(struct cli_state *cli, prs_struct *rdata, int len, int auth_len)
{
	/*
	 * The following is that length of the data we must sign or seal.
	 * This doesn't include the RPC headers or the auth_len or the RPC_HDR_AUTH_LEN
	 * preceeding the auth_data.
	 */

	int data_len = len - RPC_HEADER_LEN - RPC_HDR_RESP_LEN - RPC_HDR_AUTH_LEN - auth_len;

	/*
	 * The start of the data to sign/seal is just after the RPC headers.
	 */
	char *reply_data = prs_data_p(rdata) + RPC_HEADER_LEN + RPC_HDR_REQ_LEN;

	BOOL auth_verify = IS_BITS_SET_ALL(cli->ntlmssp_srv_flgs, NTLMSSP_NEGOTIATE_SIGN);
	BOOL auth_seal = IS_BITS_SET_ALL(cli->ntlmssp_srv_flgs, NTLMSSP_NEGOTIATE_SEAL);

	DEBUG(5,("rpc_auth_pipe: len: %d auth_len: %d verify %s seal %s\n",
	          len, auth_len, BOOLSTR(auth_verify), BOOLSTR(auth_seal)));

	/*
	 * Unseal any sealed data in the PDU, not including the
	 * 8 byte auth_header or the auth_data.
	 */

	if (auth_seal) {
		DEBUG(10,("rpc_auth_pipe: unseal\n"));
		dump_data(100, reply_data, data_len);
		NTLMSSPcalc_ap(cli, (uchar*)reply_data, data_len);
		dump_data(100, reply_data, data_len);
	}

	if (auth_verify || auth_seal) {
		RPC_HDR_AUTH rhdr_auth; 
		prs_struct auth_req;
		char data[RPC_HDR_AUTH_LEN];
		/*
		 * We set dp to be the end of the packet, minus the auth_len
		 * and the length of the header that preceeds the auth_data.
		 */
		char *dp = prs_data_p(rdata) + len - auth_len - RPC_HDR_AUTH_LEN;

		if(dp - prs_data_p(rdata) > prs_data_size(rdata)) {
			DEBUG(0,("rpc_auth_pipe: auth data > data size !\n"));
			return False;
		}

		memcpy(data, dp, sizeof(data));
		
		prs_init(&auth_req , 0, 4, UNMARSHALL);
		prs_give_memory(&auth_req, data, RPC_HDR_AUTH_LEN, False);

		/*
		 * Unmarshall the 8 byte auth_header that comes before the
		 * auth data.
		 */

		if(!smb_io_rpc_hdr_auth("hdr_auth", &rhdr_auth, &auth_req, 0)) {
			DEBUG(0,("rpc_auth_pipe: unmarshalling RPC_HDR_AUTH failed.\n"));
			return False;
		}

		if (!rpc_hdr_auth_chk(&rhdr_auth)) {
			DEBUG(0,("rpc_auth_pipe: rpc_hdr_auth_chk failed.\n"));
			return False;
		}
	}

	/*
	 * Now unseal and check the auth verifier in the auth_data at
	 * then end of the packet. The 4 bytes skipped in the unseal
	 * seem to be a buffer pointer preceeding the sealed data.
	 */

	if (auth_verify) {
		RPC_AUTH_NTLMSSP_CHK chk;
		uint32 crc32;
		prs_struct auth_verf;
		char data[RPC_AUTH_NTLMSSP_CHK_LEN];
		char *dp = prs_data_p(rdata) + len - auth_len;

		if(dp - prs_data_p(rdata) > prs_data_size(rdata)) {
			DEBUG(0,("rpc_auth_pipe: auth data > data size !\n"));
			return False;
		}

		DEBUG(10,("rpc_auth_pipe: verify\n"));
		dump_data(100, dp, auth_len);
		NTLMSSPcalc_ap(cli, (uchar*)(dp+4), auth_len - 4);

		memcpy(data, dp, RPC_AUTH_NTLMSSP_CHK_LEN);
		dump_data(100, data, auth_len);

		prs_init(&auth_verf, 0, 4, UNMARSHALL);
		prs_give_memory(&auth_verf, data, RPC_AUTH_NTLMSSP_CHK_LEN, False);

		if(!smb_io_rpc_auth_ntlmssp_chk("auth_sign", &chk, &auth_verf, 0)) {
			DEBUG(0,("rpc_auth_pipe: unmarshalling RPC_AUTH_NTLMSSP_CHK failed.\n"));
			return False;
		}

		crc32 = crc32_calc_buffer(reply_data, data_len);

		if (!rpc_auth_ntlmssp_chk(&chk, crc32 , cli->ntlmssp_seq_num)) {
			DEBUG(0,("rpc_auth_pipe: rpc_auth_ntlmssp_chk failed.\n"));
			return False;
		}
		cli->ntlmssp_seq_num++;
	}
	return True;
}


/****************************************************************************
 Send data on an rpc pipe, which *must* be in one fragment.
 receive response data from an rpc pipe, which may be large...

 Read the first fragment: unfortunately have to use SMBtrans for the first
 bit, then SMBreadX for subsequent bits.

 If first fragment received also wasn't the last fragment, continue
 getting fragments until we _do_ receive the last fragment.

 Request/Response PDU's look like the following...

 |<------------------PDU len----------------------------------------------->|
 |<-HDR_LEN-->|<--REQ LEN------>|.............|<-AUTH_HDRLEN->|<-AUTH_LEN-->|

 +------------+-----------------+-------------+---------------+-------------+
 | RPC HEADER | REQ/RESP HEADER | DATA ...... | AUTH_HDR      | AUTH DATA   |
 +------------+-----------------+-------------+---------------+-------------+

 Where the presence of the AUTH_HDR and AUTH are dependent on the
 signing & sealing being neogitated.

 ****************************************************************************/

static BOOL rpc_api_pipe(struct cli_state *cli, uint16 cmd, prs_struct *data, prs_struct *rdata)
{
	uint32 len;
	char *rparam = NULL;
	uint32 rparam_len = 0;
	uint16 setup[2];
	uint32 err;
	BOOL first = True;
	BOOL last  = True;
	RPC_HDR rhdr;
	char *pdata = data ? prs_data_p(data) : NULL;
	uint32 data_len = data ? prs_offset(data) : 0;
	char *prdata = NULL;
	uint32 rdata_len = 0;
	uint32 current_offset = 0;

	/* 
	 * Create setup parameters - must be in native byte order.
	 */
	setup[0] = cmd; 
	setup[1] = cli->nt_pipe_fnum; /* Pipe file handle. */

	DEBUG(5,("rpc_api_pipe: cmd:%x fnum:%x\n", (int)cmd, (int)cli->nt_pipe_fnum));

	/* send the data: receive a response. */
	if (!cli_api_pipe(cli, "\\PIPE\\\0\0\0", 8,
	          setup, 2, 0,                     /* Setup, length, max */
	          NULL, 0, 0,                      /* Params, length, max */
	          pdata, data_len, data_len,       /* data, length, max */                  
	          &rparam, &rparam_len,            /* return params, len */
	          &prdata, &rdata_len))            /* return data, len */
	{
		DEBUG(0, ("cli_pipe: return critical error. Error was %s\n", cli_errstr(cli)));
		return False;
	}

	/*
	 * Throw away returned params - we know we won't use them.
	 */

	if(rparam) {
		free(rparam);
		rparam = NULL;
	}

	if (prdata == NULL) {
		DEBUG(0,("rpc_api_pipe: cmd %x on pipe %x failed to return data.\n",
			(int)cmd, (int)cli->nt_pipe_fnum));
		return False;
	}

	/*
	 * Give this memory as dynamically allocated to the return parse struct.
	 */

	prs_give_memory(rdata, prdata, rdata_len, True);
	current_offset = rdata_len;

	if (!rpc_check_hdr(rdata, &rhdr, &first, &last, &len)) {
		prs_mem_free(rdata);
		return False;
	}

	if (rhdr.pkt_type == RPC_BINDACK) {
		if (!last && !first) {
			DEBUG(5,("rpc_api_pipe: bug in server (AS/U?), setting fragment first/last ON.\n"));
			first = True;
			last = True;
		}
	}

	if (rhdr.pkt_type == RPC_RESPONSE) {
		RPC_HDR_RESP rhdr_resp;
		if(!smb_io_rpc_hdr_resp("rpc_hdr_resp", &rhdr_resp, rdata, 0)) {
			DEBUG(5,("rpc_api_pipe: failed to unmarshal RPC_HDR_RESP.\n"));
			prs_mem_free(rdata);
			return False;
		}
	}

	DEBUG(5,("rpc_api_pipe: len left: %u smbtrans read: %u\n",
	          (unsigned int)len, (unsigned int)rdata_len ));

	/* check if data to be sent back was too large for one SMB. */
	/* err status is only informational: the _real_ check is on the length */
	if (len > 0) { 
		/* || err == (0x80000000 | STATUS_BUFFER_OVERFLOW)) */
		/*
		 * Read the rest of the first response PDU.
		 */
		if (!rpc_read(cli, rdata, len, &current_offset)) {
			prs_mem_free(rdata);
			return False;
		}
	}

	/*
	 * Now we have a complete PDU, check the auth struct if any was sent.
	 */

	if (rhdr.auth_len != 0) {
		if(!rpc_auth_pipe(cli, rdata, rhdr.frag_len, rhdr.auth_len))
			return False;
		/*
		 * Drop the auth footers from the current offset.
		 * We need this if there are more fragments.
		 * The auth footers consist of the auth_data and the
		 * preceeding 8 byte auth_header.
		 */
		current_offset -= (rhdr.auth_len + RPC_HDR_AUTH_LEN);
	}
	
	/* 
	 * Only one rpc fragment, and it has been read.
	 */

	if (first && last) {
		DEBUG(6,("rpc_api_pipe: fragment first and last both set\n"));
		return True;
	}

	/*
	 * Read more fragments until we get the last one.
	 */

	while (!last) {
		RPC_HDR_RESP rhdr_resp;
		int num_read;
		char hdr_data[RPC_HEADER_LEN+RPC_HDR_RESP_LEN];
		prs_struct hps;

		/*
		 * First read the header of the next PDU.
		 */

		prs_init(&hps, 0, 4, UNMARSHALL);
		prs_give_memory(&hps, hdr_data, sizeof(hdr_data), False);

		num_read = cli_read(cli, cli->nt_pipe_fnum, hdr_data, 0, RPC_HEADER_LEN+RPC_HDR_RESP_LEN);
		if (cli_error(cli, NULL, &err, NULL)) {
			DEBUG(0,("rpc_api_pipe: cli_read error : %d\n", err ));
			return False;
		}

		DEBUG(5,("rpc_api_pipe: read header (size:%d)\n", num_read));

		if (num_read != RPC_HEADER_LEN+RPC_HDR_RESP_LEN) {
			DEBUG(0,("rpc_api_pipe: Error : requested %d bytes, got %d.\n",
				RPC_HEADER_LEN+RPC_HDR_RESP_LEN, num_read ));
			return False;
		}

		if (!rpc_check_hdr(&hps, &rhdr, &first, &last, &len))
			return False;

		if(!smb_io_rpc_hdr_resp("rpc_hdr_resp", &rhdr_resp, &hps, 0)) {
			DEBUG(0,("rpc_api_pipe: Error in unmarshalling RPC_HDR_RESP.\n"));
			return False;
		}

		if (first) {
			DEBUG(0,("rpc_api_pipe: secondary PDU rpc header has 'first' set !\n"));
			return False;
		}

		/*
		 * Now read the rest of the PDU.
		 */

		if (!rpc_read(cli, rdata, len, &current_offset))
			return False;

		/*
		 * Verify any authentication footer.
		 */

		if (rhdr.auth_len != 0 ) {
			if(!rpc_auth_pipe(cli, rdata, rhdr.frag_len, rhdr.auth_len))
				return False;
			/*
			 * Drop the auth footers from the current offset.
			 * The auth footers consist of the auth_data and the
			 * preceeding 8 byte auth_header.
			 * We need this if there are more fragments.
			 */
			current_offset -= (rhdr.auth_len + RPC_HDR_AUTH_LEN);
		}
	}

	return True;
}

/*******************************************************************
 creates a DCE/RPC bind request

 - initialises the parse structure.
 - dynamically allocates the header data structure
 - caller is expected to free the header data structure once used.

 ********************************************************************/

static BOOL create_rpc_bind_req(prs_struct *rpc_out, BOOL do_auth, uint32 rpc_call_id,
                                RPC_IFACE *abstract, RPC_IFACE *transfer,
                                char *my_name, char *domain, uint32 neg_flags)
{
	RPC_HDR hdr;
	RPC_HDR_RB hdr_rb;
	char buffer[4096];
	prs_struct auth_info;
	int auth_len = 0;

	prs_init(&auth_info, 0, 4, MARSHALL);

	if (do_auth) {
		RPC_HDR_AUTH hdr_auth;
		RPC_AUTH_VERIFIER auth_verifier;
		RPC_AUTH_NTLMSSP_NEG ntlmssp_neg;

		/*
		 * Create the auth structs we will marshall.
		 */

		init_rpc_hdr_auth(&hdr_auth, NTLMSSP_AUTH_TYPE, NTLMSSP_AUTH_LEVEL, 0x00, 1);
		init_rpc_auth_verifier(&auth_verifier, "NTLMSSP", NTLMSSP_NEGOTIATE);
		init_rpc_auth_ntlmssp_neg(&ntlmssp_neg, neg_flags, my_name, domain);

		/*
		 * Use the 4k buffer to store the auth info.
		 */

		prs_give_memory( &auth_info, buffer, sizeof(buffer), False);

		/*
		 * Now marshall the data into the temporary parse_struct.
		 */

		if(!smb_io_rpc_hdr_auth("hdr_auth", &hdr_auth, &auth_info, 0)) {
			DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_HDR_AUTH.\n"));
			return False;
		}

		if(!smb_io_rpc_auth_verifier("auth_verifier", &auth_verifier, &auth_info, 0)) {
			DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_AUTH_VERIFIER.\n"));
			return False;
		}

		if(!smb_io_rpc_auth_ntlmssp_neg("ntlmssp_neg", &ntlmssp_neg, &auth_info, 0)) {
			DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_AUTH_NTLMSSP_NEG.\n"));
			return False;
		}

		/* Auth len in the rpc header doesn't include auth_header. */
		auth_len = prs_offset(&auth_info) - RPC_HDR_AUTH_LEN;
	}

	/* create the request RPC_HDR */
	init_rpc_hdr(&hdr, RPC_BIND, 0x0, rpc_call_id, 
		RPC_HEADER_LEN + RPC_HDR_RB_LEN + prs_offset(&auth_info),
		auth_len);

	if(!smb_io_rpc_hdr("hdr"   , &hdr, rpc_out, 0)) {
		DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_HDR.\n"));
		return False;
	}

	/* create the bind request RPC_HDR_RB */
	init_rpc_hdr_rb(&hdr_rb, MAX_PDU_FRAG_LEN, MAX_PDU_FRAG_LEN, 0x0,
			0x1, 0x0, 0x1, abstract, transfer);

	/* Marshall the bind request data */
	if(!smb_io_rpc_hdr_rb("", &hdr_rb, rpc_out, 0)) {
		DEBUG(0,("create_rpc_bind_req: failed to marshall RPC_HDR_RB.\n"));
		return False;
	}

	/*
	 * Grow the outgoing buffer to store any auth info.
	 */

	if(hdr.auth_len != 0) {
		if(!prs_append_prs_data( rpc_out, &auth_info)) {
			DEBUG(0,("create_rpc_bind_req: failed to grow parse struct to add auth.\n"));
			return False;
		}
	}

	return True;
}

/*******************************************************************
 Creates a DCE/RPC bind authentication response.
 This is the packet that is sent back to the server once we
 have received a BIND-ACK, to finish the third leg of
 the authentication handshake.
 ********************************************************************/

static BOOL create_rpc_bind_resp(struct pwd_info *pwd,
				char *domain, char *user_name, char *my_name,
				uint32 ntlmssp_cli_flgs,
				uint32 rpc_call_id,
				prs_struct *rpc_out)
{
	unsigned char lm_owf[24];
	unsigned char nt_owf[24];
	RPC_HDR hdr;
	RPC_HDR_AUTHA hdr_autha;
	RPC_AUTH_VERIFIER auth_verifier;
	RPC_AUTH_NTLMSSP_RESP ntlmssp_resp;
	char buffer[4096];
	prs_struct auth_info;

	/*
	 * Marshall the variable length data into a temporary parse
	 * struct, pointing into a 4k local buffer.
	 */
        prs_init(&auth_info, 0, 4, MARSHALL);

	/*
	 * Use the 4k buffer to store the auth info.
	 */

	prs_give_memory( &auth_info, buffer, sizeof(buffer), False);

	/*
	 * Create the variable length auth_data.
	 */

 	init_rpc_auth_verifier(&auth_verifier, "NTLMSSP", NTLMSSP_AUTH);

	pwd_get_lm_nt_owf(pwd, lm_owf, nt_owf);
			
	init_rpc_auth_ntlmssp_resp(&ntlmssp_resp,
			         lm_owf, nt_owf,
			         domain, user_name, my_name,
			         ntlmssp_cli_flgs);

	/*
	 * Marshall the variable length auth_data into a temp parse_struct.
	 */

	if(!smb_io_rpc_auth_verifier("auth_verifier", &auth_verifier, &auth_info, 0)) {
		DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_AUTH_VERIFIER.\n"));
		return False;
	}

	if(!smb_io_rpc_auth_ntlmssp_resp("ntlmssp_resp", &ntlmssp_resp, &auth_info, 0)) {
		DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_AUTH_NTLMSSP_RESP.\n"));
		return False;
	}

	/* Create the request RPC_HDR */
	init_rpc_hdr(&hdr, RPC_BINDRESP, 0x0, rpc_call_id,
			RPC_HEADER_LEN + RPC_HDR_AUTHA_LEN + prs_offset(&auth_info),
			prs_offset(&auth_info) );

	/* Marshall it. */
	if(!smb_io_rpc_hdr("hdr", &hdr, rpc_out, 0)) {
		DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_HDR.\n"));
		return False;
	}

	/* Create the request RPC_HDR_AUTHA */
	init_rpc_hdr_autha(&hdr_autha, MAX_PDU_FRAG_LEN, MAX_PDU_FRAG_LEN,
			NTLMSSP_AUTH_TYPE, NTLMSSP_AUTH_LEVEL, 0x00);

	if(!smb_io_rpc_hdr_autha("hdr_autha", &hdr_autha, rpc_out, 0)) {
		DEBUG(0,("create_rpc_bind_resp: failed to marshall RPC_HDR_AUTHA.\n"));
		return False;
	}

	/*
	 * Append the auth data to the outgoing buffer.
	 */

	if(!prs_append_prs_data(rpc_out, &auth_info)) {
		DEBUG(0,("create_rpc_bind_req: failed to grow parse struct to add auth.\n"));
		return False;
	}

	return True;
}


/*******************************************************************
 Creates a DCE/RPC request.
 ********************************************************************/

static BOOL create_rpc_request(prs_struct *rpc_out, uint8 op_num, int data_len, int auth_len)
{
	uint32 alloc_hint;
	RPC_HDR     hdr;
	RPC_HDR_REQ hdr_req;

	DEBUG(5,("create_rpc_request: opnum: 0x%x data_len: 0x%x\n", op_num, data_len));

	/* create the rpc header RPC_HDR */
	init_rpc_hdr(&hdr, RPC_REQUEST, RPC_FLG_FIRST | RPC_FLG_LAST,
	             get_rpc_call_id(), data_len, auth_len);

	/*
	 * The alloc hint should be the amount of data, not including 
	 * RPC headers & footers.
	 */

	if (auth_len != 0)
		alloc_hint = data_len - RPC_HEADER_LEN - RPC_HDR_AUTH_LEN - auth_len;
	else
		alloc_hint = data_len - RPC_HEADER_LEN;

	DEBUG(10,("create_rpc_request: data_len: %x auth_len: %x alloc_hint: %x\n",
	           data_len, auth_len, alloc_hint));

	/* Create the rpc request RPC_HDR_REQ */
	init_rpc_hdr_req(&hdr_req, alloc_hint, op_num);

	/* stream-time... */
	if(!smb_io_rpc_hdr("hdr    ", &hdr, rpc_out, 0))
		return False;

	if(!smb_io_rpc_hdr_req("hdr_req", &hdr_req, rpc_out, 0))
		return False;

	if (prs_offset(rpc_out) != RPC_HEADER_LEN + RPC_HDR_REQ_LEN)
		return False;

	return True;
}


/****************************************************************************
 Send a request on an rpc pipe.
 ****************************************************************************/

BOOL rpc_api_pipe_req(struct cli_state *cli, uint8 op_num,
                      prs_struct *data, prs_struct *rdata)
{
	prs_struct outgoing_packet;
	uint32 data_len;
	uint32 auth_len;
	BOOL ret;
	BOOL auth_verify;
	BOOL auth_seal;
	uint32 crc32 = 0;
	char *pdata_out = NULL;

	auth_verify = IS_BITS_SET_ALL(cli->ntlmssp_srv_flgs, NTLMSSP_NEGOTIATE_SIGN);
	auth_seal   = IS_BITS_SET_ALL(cli->ntlmssp_srv_flgs, NTLMSSP_NEGOTIATE_SEAL);

	/*
	 * The auth_len doesn't include the RPC_HDR_AUTH_LEN.
	 */

	auth_len = (auth_verify ? RPC_AUTH_NTLMSSP_CHK_LEN : 0);

	/*
	 * PDU len is header, plus request header, plus data, plus
	 * auth_header_len (if present), plus auth_len (if present).
	 * NB. The auth stuff should be aligned on an 8 byte boundary
	 * to be totally DCE/RPC spec complient. For now we cheat and
	 * hope that the data structs defined are a multiple of 8 bytes.
	 */

	if((prs_offset(data) % 8) != 0) {
		DEBUG(5,("rpc_api_pipe_req: Outgoing data not a multiple of 8 bytes....\n"));
	}

	data_len = RPC_HEADER_LEN + RPC_HDR_REQ_LEN + prs_offset(data) +
			(auth_verify ? RPC_HDR_AUTH_LEN : 0) + auth_len;

	/*
	 * Malloc a parse struct to hold it (and enough for alignments).
	 */

	if(!prs_init(&outgoing_packet, data_len + 8, 4, MARSHALL)) {
		DEBUG(0,("rpc_api_pipe_req: Failed to malloc %u bytes.\n", (unsigned int)data_len ));
		return False;
	}

	pdata_out = prs_data_p(&outgoing_packet);
	
	/*
	 * Write out the RPC header and the request header.
	 */

	if(!create_rpc_request(&outgoing_packet, op_num, data_len, auth_len)) {
		DEBUG(0,("rpc_api_pipe_req: Failed to create RPC request.\n"));
		prs_mem_free(&outgoing_packet);
		return False;
	}

	/*
	 * Seal the outgoing data if requested.
	 */

	if (auth_seal) {
		crc32 = crc32_calc_buffer(prs_data_p(data), prs_offset(data));
		NTLMSSPcalc_ap(cli, (unsigned char*)prs_data_p(data), prs_offset(data));
	}

	/*
	 * Now copy the data into the outgoing packet.
	 */

	if(!prs_append_prs_data( &outgoing_packet, data)) {
		DEBUG(0,("rpc_api_pipe_req: Failed to append data to outgoing packet.\n"));
		prs_mem_free(&outgoing_packet);
		return False;
	}

	/*
	 * Add a trailing auth_verifier if needed.
	 */

	if (auth_seal || auth_verify) {
		RPC_HDR_AUTH hdr_auth;

		init_rpc_hdr_auth(&hdr_auth, NTLMSSP_AUTH_TYPE,
			NTLMSSP_AUTH_LEVEL, 0x08, (auth_verify ? 1 : 0));
		if(!smb_io_rpc_hdr_auth("hdr_auth", &hdr_auth, &outgoing_packet, 0)) {
			DEBUG(0,("rpc_api_pipe_req: Failed to marshal RPC_HDR_AUTH.\n"));
			prs_mem_free(&outgoing_packet);
			return False;
		}
	}

	/*
	 * Finally the auth data itself.
	 */

	if (auth_verify) {
		RPC_AUTH_NTLMSSP_CHK chk;
		uint32 current_offset = prs_offset(&outgoing_packet);

		init_rpc_auth_ntlmssp_chk(&chk, NTLMSSP_SIGN_VERSION, crc32, cli->ntlmssp_seq_num++);
		if(!smb_io_rpc_auth_ntlmssp_chk("auth_sign", &chk, &outgoing_packet, 0)) {
			DEBUG(0,("rpc_api_pipe_req: Failed to marshal RPC_AUTH_NTLMSSP_CHK.\n"));
			prs_mem_free(&outgoing_packet);
			return False;
		}
		NTLMSSPcalc_ap(cli, (unsigned char*)&pdata_out[current_offset+4], RPC_AUTH_NTLMSSP_CHK_LEN - 4);
	}

	DEBUG(100,("data_len: %x data_calc_len: %x\n", data_len, prs_offset(&outgoing_packet)));

	ret = rpc_api_pipe(cli, 0x0026, &outgoing_packet, rdata);

	prs_mem_free(&outgoing_packet);

	return ret;
}

/****************************************************************************
 Set the handle state.
****************************************************************************/

static BOOL rpc_pipe_set_hnd_state(struct cli_state *cli, char *pipe_name, uint16 device_state)
{
	BOOL state_set = False;
	char param[2];
	uint16 setup[2]; /* only need 2 uint16 setup parameters */
	char *rparam = NULL;
	char *rdata = NULL;
	uint32 rparam_len, rdata_len;

	if (pipe_name == NULL)
		return False;

	DEBUG(5,("Set Handle state Pipe[%x]: %s - device state:%x\n",
	cli->nt_pipe_fnum, pipe_name, device_state));

	/* create parameters: device state */
	SSVAL(param, 0, device_state);

	/* create setup parameters. */
	setup[0] = 0x0001; 
	setup[1] = cli->nt_pipe_fnum; /* pipe file handle.  got this from an SMBOpenX. */

	/* send the data on \PIPE\ */
	if (cli_api_pipe(cli, "\\PIPE\\\0\0\0", 8,
	            setup, 2, 0,                /* setup, length, max */
	            param, 2, 0,                /* param, length, max */
	            NULL, 0, 1024,              /* data, length, max */
	            &rparam, &rparam_len,        /* return param, length */
	            &rdata, &rdata_len))         /* return data, length */
	{
		DEBUG(5, ("Set Handle state: return OK\n"));
		state_set = True;
	}

	if (rparam)
		free(rparam);
	if (rdata)
		free(rdata );

	return state_set;
}

/****************************************************************************
 check the rpc bind acknowledge response
****************************************************************************/

static BOOL valid_pipe_name(char *pipe_name, RPC_IFACE *abstract, RPC_IFACE *transfer)
{
	int pipe_idx = 0;

	while (pipe_names[pipe_idx].client_pipe != NULL) {
		if (strequal(pipe_name, pipe_names[pipe_idx].client_pipe )) {
			DEBUG(5,("Bind Abstract Syntax: "));	
			dump_data(5, (char*)&(pipe_names[pipe_idx].abstr_syntax), 
			          sizeof(pipe_names[pipe_idx].abstr_syntax));
			DEBUG(5,("Bind Transfer Syntax: "));
			dump_data(5, (char*)&(pipe_names[pipe_idx].trans_syntax),
			          sizeof(pipe_names[pipe_idx].trans_syntax));

			/* copy the required syntaxes out so we can do the right bind */
			*transfer = pipe_names[pipe_idx].trans_syntax;
			*abstract = pipe_names[pipe_idx].abstr_syntax;

			return True;
		}
		pipe_idx++;
	};

	DEBUG(5,("Bind RPC Pipe[%s] unsupported\n", pipe_name));
	return False;
}

/****************************************************************************
 check the rpc bind acknowledge response
****************************************************************************/

static BOOL check_bind_response(RPC_HDR_BA *hdr_ba, char *pipe_name, RPC_IFACE *transfer)
{
	int i = 0;

	while ((pipe_names[i].client_pipe != NULL) && hdr_ba->addr.len > 0) {
		DEBUG(6,("bind_rpc_pipe: searching pipe name: client:%s server:%s\n",
		pipe_names[i].client_pipe , pipe_names[i].server_pipe ));

		if ((strequal(pipe_name, pipe_names[i].client_pipe ))) {
			if (strequal(hdr_ba->addr.str, pipe_names[i].server_pipe )) {
				DEBUG(5,("bind_rpc_pipe: server pipe_name found: %s\n",
				         pipe_names[i].server_pipe ));
				break;
			} else {
				DEBUG(4,("bind_rpc_pipe: pipe_name %s != expected pipe %s.  oh well!\n",
				         pipe_names[i].server_pipe ,
				         hdr_ba->addr.str));
				break;
			}
		} else {
			i++;
		}
	}

	if (pipe_names[i].server_pipe == NULL) {
		DEBUG(2,("bind_rpc_pipe: pipe name %s unsupported\n", hdr_ba->addr.str));
		return False;
	}

	/* check the transfer syntax */
	if ((hdr_ba->transfer.version != transfer->version) ||
	     (memcmp(&hdr_ba->transfer.uuid, &transfer->uuid, sizeof(transfer->uuid)) !=0)) {
		DEBUG(0,("bind_rpc_pipe: transfer syntax differs\n"));
		return False;
	}

	/* lkclXXXX only accept one result: check the result(s) */
	if (hdr_ba->res.num_results != 0x1 || hdr_ba->res.result != 0) {
		DEBUG(2,("bind_rpc_pipe: bind denied results: %d reason: %x\n",
		          hdr_ba->res.num_results, hdr_ba->res.reason));
	}

	DEBUG(5,("bind_rpc_pipe: accepted!\n"));
	return True;
}

/****************************************************************************
 Create and send the third packet in an RPC auth.
****************************************************************************/

static BOOL rpc_send_auth_reply(struct cli_state *cli, prs_struct *rdata, uint32 rpc_call_id)
{
	RPC_HDR_AUTH rhdr_auth;
	RPC_AUTH_VERIFIER rhdr_verf;
	RPC_AUTH_NTLMSSP_CHAL rhdr_chal;
	char buffer[MAX_PDU_FRAG_LEN];
	prs_struct rpc_out;
	ssize_t ret;

	unsigned char p24[24];
	unsigned char lm_owf[24];
	unsigned char lm_hash[16];

	if(!smb_io_rpc_hdr_auth("", &rhdr_auth, rdata, 0)) {
		DEBUG(0,("rpc_send_auth_reply: Failed to unmarshall RPC_HDR_AUTH.\n"));
		return False;
	}
	if(!smb_io_rpc_auth_verifier("", &rhdr_verf, rdata, 0)) {
		DEBUG(0,("rpc_send_auth_reply: Failed to unmarshall RPC_AUTH_VERIFIER.\n"));
		return False;
	}
	if(!smb_io_rpc_auth_ntlmssp_chal("", &rhdr_chal, rdata, 0)) {
		DEBUG(0,("rpc_send_auth_reply: Failed to unmarshall RPC_AUTH_NTLMSSP_CHAL.\n"));
		return False;
	}

	cli->ntlmssp_cli_flgs = rhdr_chal.neg_flags;

	pwd_make_lm_nt_owf(&cli->pwd, rhdr_chal.challenge);

	prs_init(&rpc_out, 0, 4, MARSHALL);

	prs_give_memory( &rpc_out, buffer, sizeof(buffer), False);

	create_rpc_bind_resp(&cli->pwd, cli->domain,
	                     cli->user_name, global_myname, 
	                     cli->ntlmssp_cli_flgs, rpc_call_id,
	                     &rpc_out);
			                    
	pwd_get_lm_nt_owf(&cli->pwd, lm_owf, NULL);
	pwd_get_lm_nt_16(&cli->pwd, lm_hash, NULL);

	NTLMSSPOWFencrypt(lm_hash, lm_owf, p24);

	{
		unsigned char j = 0;
		int ind;
		unsigned char k2[8];

		memcpy(k2, p24, 5);
		k2[5] = 0xe5;
		k2[6] = 0x38;
		k2[7] = 0xb0;

		for (ind = 0; ind < 256; ind++)
			cli->ntlmssp_hash[ind] = (unsigned char)ind;

		for( ind = 0; ind < 256; ind++) {
			unsigned char tc;

			j += (cli->ntlmssp_hash[ind] + k2[ind%8]);

			tc = cli->ntlmssp_hash[ind];
			cli->ntlmssp_hash[ind] = cli->ntlmssp_hash[j];
			cli->ntlmssp_hash[j] = tc;
		}

		cli->ntlmssp_hash[256] = 0;
		cli->ntlmssp_hash[257] = 0;
	}

	memset((char *)lm_hash, '\0', sizeof(lm_hash));

	if ((ret = cli_write(cli, cli->nt_pipe_fnum, 0x8, prs_data_p(&rpc_out), 
			0, (size_t)prs_offset(&rpc_out))) != (ssize_t)prs_offset(&rpc_out)) {
		DEBUG(0,("rpc_send_auth_reply: cli_write failed. Return was %d\n", (int)ret));
		return False;
	}

	cli->ntlmssp_srv_flgs = rhdr_chal.neg_flags;
	return True;
}

/****************************************************************************
 Do an rpc bind.
****************************************************************************/

static BOOL rpc_pipe_bind(struct cli_state *cli, char *pipe_name, char *my_name)
{
	RPC_IFACE abstract;
	RPC_IFACE transfer;
	prs_struct rpc_out;
	prs_struct rdata;
	BOOL do_auth = (cli->ntlmssp_cli_flgs != 0);
	uint32 rpc_call_id;
	char buffer[MAX_PDU_FRAG_LEN];

	DEBUG(5,("Bind RPC Pipe[%x]: %s\n", cli->nt_pipe_fnum, pipe_name));

	if (!valid_pipe_name(pipe_name, &abstract, &transfer))
		return False;

	prs_init(&rpc_out, 0, 4, MARSHALL);

	/*
	 * Use the MAX_PDU_FRAG_LEN buffer to store the bind request.
	 */

	prs_give_memory( &rpc_out, buffer, sizeof(buffer), False);

	rpc_call_id = get_rpc_call_id();

	/* Marshall the outgoing data. */
	create_rpc_bind_req(&rpc_out, do_auth, rpc_call_id,
	                    &abstract, &transfer,
	                    global_myname, cli->domain, cli->ntlmssp_cli_flgs);

	/* Initialize the incoming data struct. */
	prs_init(&rdata, 0, 4, UNMARSHALL);

	/* send data on \PIPE\.  receive a response */
	if (rpc_api_pipe(cli, 0x0026, &rpc_out, &rdata)) {
		RPC_HDR_BA   hdr_ba;

		DEBUG(5, ("rpc_pipe_bind: rpc_api_pipe returned OK.\n"));

		if(!smb_io_rpc_hdr_ba("", &hdr_ba, &rdata, 0)) {
			DEBUG(0,("rpc_pipe_bind: Failed to unmarshall RPC_HDR_BA.\n"));
			prs_mem_free(&rdata);
			return False;
		}

		if(!check_bind_response(&hdr_ba, pipe_name, &transfer)) {
			DEBUG(0,("rpc_pipe_bind: check_bind_response failed.\n"));
			prs_mem_free(&rdata);
			return False;
		}

		cli->max_xmit_frag = hdr_ba.bba.max_tsize;
		cli->max_recv_frag = hdr_ba.bba.max_rsize;

		/*
		 * If we're doing NTLMSSP auth we need to send a reply to
		 * the bind-ack to complete the 3-way challenge response
		 * handshake.
		 */

		if (do_auth && !rpc_send_auth_reply(cli, &rdata, rpc_call_id)) {
			DEBUG(0,("rpc_pipe_bind: rpc_send_auth_reply failed.\n"));
			prs_mem_free(&rdata);
			return False;
		}
	}

	prs_mem_free(&rdata);
	return True;
}

/****************************************************************************
 Set ntlmssp negotiation flags.
 ****************************************************************************/

void cli_nt_set_ntlmssp_flgs(struct cli_state *cli, uint32 ntlmssp_flgs)
{
	cli->ntlmssp_cli_flgs = ntlmssp_flgs;
}


/****************************************************************************
 Open a session.
 ****************************************************************************/

BOOL cli_nt_session_open(struct cli_state *cli, char *pipe_name)
{
	int fnum;

	if (IS_BITS_SET_ALL(cli->capabilities, CAP_NT_SMBS)) {
		if ((fnum = cli_nt_create(cli, &(pipe_name[5]))) == -1) {
			DEBUG(0,("cli_nt_session_open: cli_nt_create failed on pipe %s to machine %s.  Error was %s\n",
				 &(pipe_name[5]), cli->desthost, cli_errstr(cli)));
			return False;
		}

		cli->nt_pipe_fnum = (uint16)fnum;
	} else {
		if ((fnum = cli_open(cli, pipe_name, O_CREAT|O_RDWR, DENY_NONE)) == -1) {
			DEBUG(0,("cli_nt_session_open: cli_open failed on pipe %s to machine %s.  Error was %s\n",
				 pipe_name, cli->desthost, cli_errstr(cli)));
			return False;
		}

		cli->nt_pipe_fnum = (uint16)fnum;

		/**************** Set Named Pipe State ***************/
		if (!rpc_pipe_set_hnd_state(cli, pipe_name, 0x4300)) {
			DEBUG(0,("cli_nt_session_open: pipe hnd state failed.  Error was %s\n",
				  cli_errstr(cli)));
			cli_close(cli, cli->nt_pipe_fnum);
			return False;
		}
	}

	/******************* bind request on pipe *****************/

	if (!rpc_pipe_bind(cli, pipe_name, global_myname)) {
		DEBUG(0,("cli_nt_session_open: rpc bind failed. Error was %s\n",
		          cli_errstr(cli)));
		cli_close(cli, cli->nt_pipe_fnum);
		return False;
	}

	/* 
	 * Setup the remote server name prefixed by \ and the machine account name.
	 */

	fstrcpy(cli->srv_name_slash, "\\\\");
	fstrcat(cli->srv_name_slash, cli->desthost);
	strupper(cli->srv_name_slash);

	fstrcpy(cli->clnt_name_slash, "\\\\");
	fstrcat(cli->clnt_name_slash, global_myname);
	strupper(cli->clnt_name_slash);

	fstrcpy(cli->mach_acct, global_myname);
	fstrcat(cli->mach_acct, "$");
	strupper(cli->mach_acct);

	return True;
}

/****************************************************************************
close the session
****************************************************************************/

void cli_nt_session_close(struct cli_state *cli)
{
	cli_close(cli, cli->nt_pipe_fnum);
}