summaryrefslogtreecommitdiff
path: root/source4/lib/registry/reg_backend_rpc.c
blob: dc6a2d86f160c2df9f606bcff5fd5e4e37f3b524 (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
/*
   Samba Unix/Linux SMB implementation
   RPC backend for the registry library
   Copyright (C) 2003-2004 Jelmer Vernooij, jelmer@samba.org

   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 3 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, see <http://www.gnu.org/licenses/>.  */
 
#include "includes.h"
#include "registry.h"
#include "librpc/gen_ndr/ndr_winreg_c.h"

static struct hive_operations reg_backend_rpc;

/**
 * This is the RPC backend for the registry library.
 */

static void init_winreg_String(struct winreg_String *name, const char *s)
{
	name->name = s;
}


#define openhive(u) static WERROR open_ ## u(struct dcerpc_pipe *p, TALLOC_CTX *mem_ctx, struct policy_handle *hnd) \
{ \
	struct winreg_Open ## u r; \
	NTSTATUS status; \
	\
	r.in.system_name = NULL; \
	r.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED; \
	r.out.handle = hnd;\
	\
	status = dcerpc_winreg_Open ## u(p, mem_ctx, &r); \
	if (NT_STATUS_IS_ERR(status)) {\
		DEBUG(0,("Error executing open\n"));\
		return ntstatus_to_werror(status);\
	}\
\
	return r.out.result;\
}

openhive(HKLM)
openhive(HKCU)
openhive(HKPD)
openhive(HKU)
openhive(HKCR)
openhive(HKDD)
openhive(HKCC)

struct rpc_key_data {
	struct policy_handle pol;
	int num_subkeys;
	int num_values;
	int max_valnamelen;
	int max_valdatalen;
};

static struct {
	uint32_t hkey;
	WERROR (*open) (struct dcerpc_pipe *p, TALLOC_CTX *, struct policy_handle *h);
} known_hives[] = {
{ HKEY_LOCAL_MACHINE, open_HKLM },
{ HKEY_CURRENT_USER, open_HKCU },
{ HKEY_CLASSES_ROOT, open_HKCR },
{ HKEY_PERFORMANCE_DATA, open_HKPD },
{ HKEY_USERS, open_HKU },
{ HKEY_DYN_DATA, open_HKDD },
{ HKEY_CURRENT_CONFIG, open_HKCC },
{ 0, NULL }
};

static WERROR rpc_query_key(const struct registry_key *k);

static WERROR rpc_get_predefined_key (struct registry_context *ctx, uint32_t hkey_type, struct registry_key **k)
{
	int n;
	struct registry_hive *h;
	struct rpc_key_data *mykeydata;

	for(n = 0; known_hives[n].hkey; n++) 
	{
		if(known_hives[n].hkey == hkey_type) break;
	}
	
	if(!known_hives[n].open)  {
		DEBUG(1, ("No such hive %d\n", hkey_type));
		return WERR_NO_MORE_ITEMS;
	}

	h = talloc(ctx, struct registry_hive);
	h->functions = &reg_backend_rpc;
	h->location = NULL;
	h->backend_data = ctx->backend_data;
	
	(*k) = h->root = talloc(h, struct registry_key);
	(*k)->hive = h;
	(*k)->backend_data = mykeydata = talloc(*k, struct rpc_key_data);
	mykeydata->num_values = -1;
	mykeydata->num_subkeys = -1;
	return known_hives[n].open((struct dcerpc_pipe *)ctx->backend_data, *k, &(mykeydata->pol));
}

#if 0
static WERROR rpc_key_put_rpc_data(TALLOC_CTX *mem_ctx, struct registry_key *k)
{
    struct winreg_OpenKey r;
	struct rpc_key_data *mykeydata;

	k->backend_data = mykeydata = talloc(mem_ctx, struct rpc_key_data);
	mykeydata->num_values = -1;
	mykeydata->num_subkeys = -1;

	/* Then, open the handle using the hive */

	memset(&r, 0, sizeof(struct winreg_OpenKey));
    r.in.handle = &(((struct rpc_key_data *)k->hive->root->backend_data)->pol);
    init_winreg_String(&r.in.keyname, k->path);
    r.in.unknown = 0x00000000;
    r.in.access_mask = 0x02000000;
    r.out.handle = &mykeydata->pol;

    dcerpc_winreg_OpenKey((struct dcerpc_pipe *)k->hive->backend_data, mem_ctx, &r);

	return r.out.result;
}
#endif

static WERROR rpc_open_key(TALLOC_CTX *mem_ctx, const struct registry_key *h, const char *name, struct registry_key **key)
{
	struct rpc_key_data *mykeydata;
    struct winreg_OpenKey r;

	*key = talloc(mem_ctx, struct registry_key);
	(*key)->name = talloc_strdup(mem_ctx, name);

	(*key)->backend_data = mykeydata = talloc(mem_ctx, struct rpc_key_data);
	mykeydata->num_values = -1;
	mykeydata->num_subkeys = -1;

	/* Then, open the handle using the hive */

	memset(&r, 0, sizeof(struct winreg_OpenKey));
    r.in.parent_handle = &(((struct rpc_key_data *)h->backend_data)->pol);
    init_winreg_String(&r.in.keyname, name);
    r.in.unknown = 0x00000000;
    r.in.access_mask = 0x02000000;
    r.out.handle = &mykeydata->pol;

    dcerpc_winreg_OpenKey((struct dcerpc_pipe *)(h->hive->backend_data), mem_ctx, &r);

	return r.out.result;
}

static WERROR rpc_get_value_by_index(TALLOC_CTX *mem_ctx, const struct registry_key *parent, int n, struct registry_value **value)  
{
	struct rpc_key_data *mykeydata = parent->backend_data;
	WERROR error;
	struct winreg_EnumValue r;
	uint32_t len1, zero = 0;
	enum winreg_Type type;
	NTSTATUS status;
	struct winreg_StringBuf name;
	uint8_t u8;
	
	if(mykeydata->num_values == -1) {
		error = rpc_query_key(parent);
		if(!W_ERROR_IS_OK(error)) return error;
	}

	len1 = mykeydata->max_valdatalen;
	
	name.length = 0;
	name.size   = mykeydata->max_valnamelen * 2;
	name.name   = "";

	r.in.handle = &mykeydata->pol;
	r.in.enum_index = n;
	r.in.name = &name;
	r.in.type = &type;
	r.in.value = &u8;
	r.in.length = &zero;
	r.in.size = &len1;
	r.out.name = &name;
	
	status = dcerpc_winreg_EnumValue((struct dcerpc_pipe *)parent->hive->backend_data, mem_ctx, &r);
	if(NT_STATUS_IS_ERR(status)) {
		DEBUG(0, ("Error in EnumValue: %s\n", nt_errstr(status)));
		return WERR_GENERAL_FAILURE;
	}
	
	if(NT_STATUS_IS_OK(status) && 
	   W_ERROR_IS_OK(r.out.result) && r.out.length) {
		*value = talloc(mem_ctx, struct registry_value);
		(*value)->name = talloc_strdup(mem_ctx, r.out.name->name);
		(*value)->data_type = type;
		(*value)->data = data_blob_talloc(mem_ctx, r.out.value, *r.out.length);
		return WERR_OK;
	}
	
	return r.out.result;
}

static WERROR rpc_get_subkey_by_index(TALLOC_CTX *mem_ctx, const struct registry_key *parent, int n, struct registry_key **subkey) 
{
	struct winreg_EnumKey r;
	struct rpc_key_data *mykeydata = parent->backend_data;
	NTSTATUS status;
	struct winreg_StringBuf namebuf, classbuf;
	NTTIME change_time = 0;

	namebuf.length = 0;
	namebuf.size   = 1024;
	namebuf.name   = NULL;
	classbuf.length = 0;
	classbuf.size   = 0;
	classbuf.name   = NULL;

	r.in.handle = &mykeydata->pol;
	r.in.enum_index = n;
	r.in.name = &namebuf;
	r.in.keyclass = &classbuf;
	r.in.last_changed_time = &change_time;
	r.out.name = &namebuf;

	status = dcerpc_winreg_EnumKey((struct dcerpc_pipe *)parent->hive->backend_data, mem_ctx, &r);
	if(NT_STATUS_IS_OK(status) && W_ERROR_IS_OK(r.out.result)) {
		char *name = talloc_strdup(mem_ctx, r.out.name->name);
		return rpc_open_key(mem_ctx, parent, name, subkey);
	}

	return r.out.result;
}

static WERROR rpc_add_key(TALLOC_CTX *mem_ctx, const struct registry_key *parent, const char *name, uint32_t access_mask, struct security_descriptor *sec, struct registry_key **key)
{
	NTSTATUS status;
	struct winreg_CreateKey r;

	init_winreg_String(&r.in.name, name);
	init_winreg_String(&r.in.keyclass, NULL);

	r.in.handle = parent->backend_data;
	r.out.new_handle = talloc(mem_ctx, struct policy_handle);	
	r.in.options = 0;
	r.in.access_mask = access_mask;
	r.in.secdesc = NULL;

	status = dcerpc_winreg_CreateKey((struct dcerpc_pipe *)(parent->hive->backend_data), mem_ctx, &r);

    if (!NT_STATUS_IS_OK(status)) {
        DEBUG(1, ("CreateKey failed - %s\n", nt_errstr(status)));
        return ntstatus_to_werror(status);
    }

	if (W_ERROR_IS_OK(r.out.result)) {
		*key = talloc(mem_ctx, struct registry_key);
		(*key)->name = talloc_strdup(*key, name);
		(*key)->backend_data = r.out.new_handle;
	}

	return r.out.result;
}

static WERROR rpc_query_key(const struct registry_key *k)
{
    NTSTATUS status;
    struct winreg_QueryInfoKey r;
    struct rpc_key_data *mykeydata = k->backend_data;
	TALLOC_CTX *mem_ctx = talloc_init("query_key");

	r.in.classname = talloc(mem_ctx, struct winreg_String);
    init_winreg_String(r.in.classname, NULL);
    r.in.handle = &mykeydata->pol;
	
    status = dcerpc_winreg_QueryInfoKey((struct dcerpc_pipe *)(k->hive->backend_data), mem_ctx, &r);
	talloc_free(mem_ctx);

    if (!NT_STATUS_IS_OK(status)) {
        DEBUG(1, ("QueryInfoKey failed - %s\n", nt_errstr(status)));
        return ntstatus_to_werror(status);
    }
                                                                                                       
    if (W_ERROR_IS_OK(r.out.result)) {
		mykeydata->num_subkeys = *r.out.num_subkeys;
		mykeydata->num_values = *r.out.num_values;
		mykeydata->max_valnamelen = *r.out.max_valnamelen;
		mykeydata->max_valdatalen = *r.out.max_valbufsize;
	} 

	return r.out.result;
}

static WERROR rpc_del_key(const struct registry_key *parent, const char *name)
{
	NTSTATUS status;
	struct rpc_key_data *mykeydata = parent->backend_data;
	struct winreg_DeleteKey r;
	TALLOC_CTX *mem_ctx = talloc_init("del_key");
	
    r.in.handle = &mykeydata->pol;
    init_winreg_String(&r.in.key, name);
 
    status = dcerpc_winreg_DeleteKey((struct dcerpc_pipe *)parent->hive->backend_data, mem_ctx, &r);

	talloc_free(mem_ctx);

	return r.out.result;
}

static WERROR rpc_num_values(const struct registry_key *key, uint32_t *count) 
{
	struct rpc_key_data *mykeydata = key->backend_data;
	WERROR error;
		
	if(mykeydata->num_values == -1) {
		error = rpc_query_key(key);
		if(!W_ERROR_IS_OK(error)) return error;
	}
			
	*count = mykeydata->num_values;
	return WERR_OK;
}

static WERROR rpc_num_subkeys(const struct registry_key *key, uint32_t *count) 
{
	struct rpc_key_data *mykeydata = key->backend_data;
	WERROR error;

	if(mykeydata->num_subkeys == -1) {
		error = rpc_query_key(key);
		if(!W_ERROR_IS_OK(error)) return error;
	}
			
	*count = mykeydata->num_subkeys;
	return WERR_OK;
}

static struct hive_operations reg_backend_rpc = {
	.name = "rpc",
	.open_key = rpc_open_key,
	.get_subkey_by_index = rpc_get_subkey_by_index,
	.get_value_by_index = rpc_get_value_by_index,
	.add_key = rpc_add_key,
	.del_key = rpc_del_key,
	.num_subkeys = rpc_num_subkeys,
	.num_values = rpc_num_values,
};

_PUBLIC_ WERROR reg_open_remote(struct registry_context **ctx, struct auth_session_info *session_info, struct cli_credentials *credentials, 
		       const char *location, struct event_context *ev)
{
	NTSTATUS status;
	struct dcerpc_pipe *p;

	*ctx = talloc(NULL, struct registry_context);

	/* Default to local smbd if no connection is specified */
	if (!location) {
		location = talloc_strdup(ctx, "ncalrpc:");
	}

	status = dcerpc_pipe_connect(*ctx /* TALLOC_CTX */, 
				     &p, location, 
					 &dcerpc_table_winreg,
				     credentials, ev);
	(*ctx)->backend_data = p;

	if(NT_STATUS_IS_ERR(status)) {
		DEBUG(1, ("Unable to open '%s': %s\n", location, nt_errstr(status)));
		talloc_free(*ctx);
		*ctx = NULL;
		return ntstatus_to_werror(status);
	}

	(*ctx)->get_predefined_key = rpc_get_predefined_key;

	return WERR_OK;
}

NTSTATUS registry_rpc_init(void)
{
	dcerpc_init();
	return registry_register(&reg_backend_rpc);
}