summaryrefslogtreecommitdiff
path: root/testsuite/printing/psec.c
blob: e3490de7598e4df220021530ccd3a25b2fe838cb (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
/* 
   Unix SMB/Netbios implementation.
   Version 2.0

   Printer security permission manipulation.

   Copyright (C) Tim Potter 2000
   
   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.
*/

/* This program can get or set NT printer security permissions from the 
   command line.  Usage: psec getsec|setsec printername.  You must have
   write access to the ntdrivers.tdb file to set permissions and read
   access to get permissions.

   For this program to compile using the supplied Makefile.psec, Samba
   must be configured with the --srcdir option

   For getsec, output like the following is sent to standard output:

       S-1-5-21-1067277791-1719175008-3000797951-500

       1 9 0x10000000 S-1-5-21-1067277791-1719175008-3000797951-501
       1 2 0x10000000 S-1-5-21-1067277791-1719175008-3000797951-501
       0 9 0x10000000 S-1-5-21-1067277791-1719175008-3000797951-500
       0 2 0x10000000 S-1-5-21-1067277791-1719175008-3000797951-500
       0 9 0x10000000 S-1-5-21-1067277791-1719175008-3000797951-513
       0 2 0x00020000 S-1-5-21-1067277791-1719175008-3000797951-513
       0 2 0xe0000000 S-1-1-0

   The first two lines describe the owner user and owner group of the printer.
   If either of these lines are blank then the respective owner property is 
   not set.  The remaining lines list the printer permissions or ACE entries, 
   one per line.  Each column describes a different property of the ACE:

       Column    Description
       -------------------------------------------------------------------
         1       ACE type (allow/deny etc) defined in rpc_secdes.h
         2       ACE flags defined in rpc_secdes.h
         3       ACE mask - printer ACE masks are defined in rpc_spoolss.h
         4       SID the ACE applies to

   The above example describes the following permissions in order:
 
       - The guest user has No Access to the printer
       - The domain administrator has Full Access
       - Domain Users can Manage Documents
       - Everyone has Print access

   The setsec command takes the output format but sets the security descriptor
   appropriately. */

#include "includes.h"

TDB_CONTEXT *tdb;

/* ACE type conversions */

char *ace_type_to_str(uint ace_type)
{
	fstring temp;

	switch(ace_type) {
	case SEC_ACE_TYPE_ACCESS_DENIED:
		return "DENY";
	case SEC_ACE_TYPE_ACCESS_ALLOWED:
		return "ALLOW";
	}

	slprintf(temp, sizeof(temp) - 1, "0x%02x", ace_type);
	return temp;
}

uint str_to_ace_type(char *ace_type)
{
	if (strcmp(ace_type, "ALLOWED") == 0) 
		return SEC_ACE_TYPE_ACCESS_ALLOWED;

	if (strcmp(ace_type, "DENIED") == 0)
		return SEC_ACE_TYPE_ACCESS_DENIED;

	return -1;
}		

/* ACE mask (permission) conversions */

char *ace_mask_to_str(uint32 ace_mask)
{
	fstring temp;

	switch (ace_mask) {
	case PRINTER_ACE_FULL_CONTROL:
		return "Full Control";
	case PRINTER_ACE_MANAGE_DOCUMENTS:
		return "Manage Documents";
	case PRINTER_ACE_PRINT:
		return "Print";
	}

	slprintf(temp, sizeof(temp) - 1, "0x%08x", ace_mask);
	return temp;
}

uint32 str_to_ace_mask(char *ace_mask)
{
	if (strcmp(ace_mask, "Full Control") == 0) 
		return PRINTER_ACE_FULL_CONTROL;

	if (strcmp(ace_mask, "Manage Documents") == 0)
		return PRINTER_ACE_MANAGE_DOCUMENTS;

	if (strcmp(ace_mask, "Print") == 0)
		return PRINTER_ACE_PRINT;

	return -1;
}

/* ACE conversions */

char *ace_to_str(SEC_ACE *ace)
{
	pstring temp;
	fstring sidstr;

	sid_to_string(sidstr, &ace->sid);

	slprintf(temp, sizeof(temp) - 1, "%s %d %s %s", 
		 ace_type_to_str(ace->type), ace->flags,
		 ace_mask_to_str(ace->info.mask), sidstr);

	return temp;
}

int str_to_ace(SEC_ACE *ace, char *ace_str)
{
	SEC_ACCESS sa;
	DOM_SID sid;
	uint32 mask;
	uint8 type, flags;

	init_sec_access(&sa, mask);
	init_sec_ace(ace, &sid, type, sa, flags);
}

/* Get a printer security descriptor */

int psec_getsec(char *printer)
{
	SEC_DESC_BUF *secdesc_ctr = NULL;
	TALLOC_CTX *mem_ctx = NULL;
	fstring keystr, sidstr, tdb_path;
	prs_struct ps;
	int result = 0, i;

	/* Open tdb for reading */

	slprintf(tdb_path, "%s/ntdrivers.tdb", LOCKDIR);
	tdb = tdb_open(tdb_path, 0, 0, O_RDONLY, 0600);

	if (!tdb) {
		printf("psec: failed to open nt drivers database: %s\n",
		       sys_errlist[errno]);
		return 1;
	}

	/* Get security blob from tdb */

	slprintf(keystr, sizeof(keystr) - 1, "SECDESC/%s", printer);

	mem_ctx = talloc_init();

	if (!mem_ctx) {
		printf("memory allocation error\n");
		result = 1;
		goto done;
	}

	if (tdb_prs_fetch(tdb, keystr, &ps, mem_ctx) != 0) {
		printf("error fetching descriptor for printer %s\n",
		       printer);
		result = 1;
		goto done;
	}

	/* Unpack into security descriptor buffer */

	if (!sec_io_desc_buf("nt_printing_getsec", &secdesc_ctr, &ps, 1)) {
		printf("error unpacking sec_desc_buf\n");
		result = 1;
		goto done;
	}

	/* Print owner and group sid */

	if (secdesc_ctr->sec->owner_sid) {
		sid_to_string(sidstr, secdesc_ctr->sec->owner_sid);
	} else {
		fstrcpy(sidstr, "");
	}

	printf("%s\n", sidstr);

	if (secdesc_ctr->sec->grp_sid) {
		sid_to_string(sidstr, secdesc_ctr->sec->grp_sid);
	} else {
		fstrcpy(sidstr, "");
	}

	printf("%s\n", sidstr);

	/* Print aces */

	if (!secdesc_ctr->sec->dacl) {
		result = 0;
		goto done;
	}

	for (i = 0; i < secdesc_ctr->sec->dacl->num_aces; i++) {
		SEC_ACE *ace = &secdesc_ctr->sec->dacl->ace[i];
		fstring sidstr;

		sid_to_string(sidstr, &ace->sid);

		printf("%d %d 0x%08x %s\n", ace->type, ace->flags,
		       ace->info.mask, sidstr);
	}

 done:
	if (tdb) tdb_close(tdb);
	if (mem_ctx) talloc_destroy(mem_ctx);
	if (secdesc_ctr) free_sec_desc_buf(&secdesc_ctr);

	return result;
}

/* Set a printer security descriptor */

int psec_setsec(char *printer)
{
	DOM_SID user_sid, group_sid;
	SEC_ACE *ace_list = NULL;
	SEC_ACL *dacl;
	SEC_DESC *sd;
	SEC_DESC_BUF *sdb = NULL;
	int result = 0, num_aces = 0;
	fstring line, keystr, tdb_path;
	size_t size;
	prs_struct ps;
	TALLOC_CTX *mem_ctx = NULL;
	BOOL has_user_sid = False, has_group_sid = False;

	/* Open tdb for reading */

	slprintf(tdb_path, "%s/ntdrivers.tdb", LOCKDIR);
	tdb = tdb_open(tdb_path, 0, 0, O_RDWR, 0600);

	if (!tdb) {
		printf("psec: failed to open nt drivers database: %s\n",
		       sys_errlist[errno]);
		result = 1;
		goto done;
	}

	/* Read owner and group sid */

	fgets(line, sizeof(fstring), stdin);
	if (line[0] != '\n') {
		string_to_sid(&user_sid, line);
		has_user_sid = True;
	}

	fgets(line, sizeof(fstring), stdin);
	if (line[0] != '\n') {
		string_to_sid(&group_sid, line);
		has_group_sid = True;
	}

	/* Read ACEs from standard input for discretionary ACL */

	while(fgets(line, sizeof(fstring), stdin)) {
		int ace_type, ace_flags;
		uint32 ace_mask;
		fstring sidstr;
		DOM_SID sid;
		SEC_ACCESS sa;

		if (sscanf(line, "%d %d 0x%x %s", &ace_type, &ace_flags, 
			   &ace_mask, sidstr) != 4) {
			continue;
		}

		string_to_sid(&sid, sidstr);
		
		ace_list = Realloc(ace_list, sizeof(SEC_ACE) * 
				   (num_aces + 1));
		
		init_sec_access(&sa, ace_mask);
		init_sec_ace(&ace_list[num_aces], &sid, ace_type, sa, 
			     ace_flags);

		num_aces++;
	}

	dacl = make_sec_acl(ACL_REVISION, num_aces, ace_list);
	free(ace_list);

	/* Create security descriptor */

	sd = make_sec_desc(SEC_DESC_REVISION, SEC_DESC_SELF_RELATIVE |
			   SEC_DESC_DACL_PRESENT, 
			   has_user_sid ? &user_sid : NULL, 
			   has_group_sid ? &group_sid : NULL,
			   NULL, /* System ACL */
			   dacl, /* Discretionary ACL */
			   &size);

	sdb = make_sec_desc_buf(size, sd);

	free_sec_desc(&sd);

	/* Write security descriptor to tdb */

	mem_ctx = talloc_init();

	if (!mem_ctx) {
		printf("memory allocation error\n");
		result = 1;
		goto done;
	}

	prs_init(&ps, (uint32)sec_desc_size(sdb->sec) + 
		 sizeof(SEC_DESC_BUF), 4, mem_ctx, MARSHALL);

	if (!sec_io_desc_buf("nt_printing_setsec", &sdb, &ps, 1)) {
		printf("sec_io_desc_buf failed\n");
		goto done;
	}

	slprintf(keystr, sizeof(keystr) - 1, "SECDESC/%s", printer);

	if (!tdb_prs_store(tdb, keystr, &ps)==0) {
		printf("Failed to store secdesc for %s\n", printer);
		goto done;
	}

 done:
	if (tdb) tdb_close(tdb);
	if (sdb) free_sec_desc_buf(&sdb);
	if (mem_ctx) talloc_destroy(mem_ctx);

	return result;
}

/* Help */

void usage(void)
{
	printf("Usage: psec getsec|setsec printername\n");
}

/* Main function */

int main(int argc, char **argv)
{
	/* Argument check */

	if (argc == 1) {
		usage();
		return 1;
	}

	/* Do commands */

	if (strcmp(argv[1], "setsec") == 0) {

		if (argc != 3) {
			usage();
			return 1;
		}

		return psec_setsec(argv[2]);
	}

	if (strcmp(argv[1], "getsec") == 0) {

		if (argc != 3) {
			usage();
			return 1;
		}

		return psec_getsec(argv[2]);
	}

	/* An unknown command */

	printf("psec: unknown command %s\n", argv[1]);
	return 1;
}