summaryrefslogtreecommitdiff
path: root/source4/lib/registry/util.c
blob: 78b578d2e502ab5c51c3d463eb993bf8225c9523 (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
/* 
   Unix SMB/CIFS implementation.
   Transparent registry backend handling
   Copyright (C) Jelmer Vernooij			2003-2007.

   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 "lib/registry/registry.h"
#include "librpc/gen_ndr/winreg.h"

/**
 * @file
 * @brief Registry utility functions
 */

static const struct {
	uint32_t id;
	const char *name;
} reg_value_types[] = {
	{ REG_SZ, "REG_SZ" },
	{ REG_DWORD, "REG_DWORD" },
	{ REG_BINARY, "REG_BINARY" },
	{ REG_EXPAND_SZ, "REG_EXPAND_SZ" },
	{ REG_NONE, "REG_NONE" },
	{ 0, NULL }
};

/** Return string description of registry value type */
_PUBLIC_ const char *str_regtype(int type)
{
	int i;
	for (i = 0; reg_value_types[i].name; i++) {
		if (reg_value_types[i].id == type) 
			return reg_value_types[i].name;
	}

	return "Unknown";
}

_PUBLIC_ char *reg_val_data_string(TALLOC_CTX *mem_ctx, uint32_t type, 
				   const DATA_BLOB data)
{ 
  char *ret = NULL;

  if (data.length == 0) 
	  return talloc_strdup(mem_ctx, "");

  switch (type) {
  case REG_EXPAND_SZ:
  case REG_SZ:
      convert_string_talloc(mem_ctx, CH_UTF16, CH_UNIX, data.data, data.length, 
							(void **)&ret);
	  return ret;

  case REG_BINARY:
	  ret = data_blob_hex_string(mem_ctx, &data);
	  return ret;

  case REG_DWORD:
	  if (*(int *)data.data == 0)
		  return talloc_strdup(mem_ctx, "0");

	  return talloc_asprintf(mem_ctx, "0x%x", *(int *)data.data);

  case REG_MULTI_SZ:
	/* FIXME */
    break;

  default:
    break;
  } 

  return ret;
}

/** Generate a string that describes a registry value */
_PUBLIC_ char *reg_val_description(TALLOC_CTX *mem_ctx, const char *name, 
								   uint32_t data_type,
								   const DATA_BLOB data)
{
	return talloc_asprintf(mem_ctx, "%s = %s : %s", name?name:"<No Name>", 
						   str_regtype(data_type), 
					reg_val_data_string(mem_ctx, data_type, data));
}

_PUBLIC_ bool reg_string_to_val(TALLOC_CTX *mem_ctx, const char *type_str, const char *data_str, uint32_t *type, DATA_BLOB *data)
{
	int i;
	*type = -1;

	/* Find the correct type */
	for (i = 0; reg_value_types[i].name; i++) {
		if (!strcmp(reg_value_types[i].name, type_str)) {
			*type = reg_value_types[i].id;
			break;
		}
	}

	if (*type == -1) 
		return false;

	/* Convert data appropriately */

	switch (*type) 
	{
		case REG_SZ:
		case REG_EXPAND_SZ:
      		data->length = convert_string_talloc(mem_ctx, CH_UNIX, CH_UTF16, data_str, strlen(data_str), (void **)&data->data);
			break;

		case REG_DWORD: {
			uint32_t tmp = strtol(data_str, NULL, 0);
			*data = data_blob_talloc(mem_ctx, &tmp, 4);
			}
			break;

		case REG_NONE:
			ZERO_STRUCTP(data);
			break;
	
		case REG_BINARY: 
			*data = strhex_to_data_blob(data_str);
			talloc_steal(mem_ctx, data->data);
			break;
			
		default:
			/* FIXME */
			return false;
	}
	return true;
}

/** Open a key by name (including the predefined key name!) */
WERROR reg_open_key_abs(TALLOC_CTX *mem_ctx, struct registry_context *handle, const char *name, struct registry_key **result)
{
	struct registry_key *predef;
	WERROR error;
	int predeflength;
	char *predefname;

	if (strchr(name, '\\') != NULL) 
		predeflength = strchr(name, '\\')-name;
	else 
		predeflength = strlen(name);

	predefname = talloc_strndup(mem_ctx, name, predeflength);
	error = reg_get_predefined_key_by_name(handle, predefname, &predef);
	talloc_free(predefname);

	if (!W_ERROR_IS_OK(error)) {
		return error;
	}

	if (strchr(name, '\\')) {
		return reg_open_key(mem_ctx, predef, strchr(name, '\\')+1, result);
	} else {
		*result = predef;
		return WERR_OK;
	}
}

static WERROR get_abs_parent(TALLOC_CTX *mem_ctx, struct registry_context *ctx, 
							 const char *path, struct registry_key **parent, 
							 const char **name)
{
	char *parent_name;
	WERROR error;
	
	if (strchr(path, '\\') == NULL) {
		return WERR_FOOBAR;
	}
	
	parent_name = talloc_strndup(mem_ctx, path, strrchr(path, '\\')-path);

	error = reg_open_key_abs(mem_ctx, ctx, parent_name, parent);
	if (!W_ERROR_IS_OK(error)) {
		return error;
	}
	
	*name = talloc_strdup(mem_ctx, strrchr(path, '\\')+1);

	return WERR_OK;
}

WERROR reg_key_del_abs(struct registry_context *ctx, const char *path)
{
	struct registry_key *parent;
	const char *n;
	TALLOC_CTX *mem_ctx = talloc_init("reg_key_del_abs");
	WERROR error;
	
	if (!strchr(path, '\\')) {
		return WERR_FOOBAR;
	}
	
	error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
	if (W_ERROR_IS_OK(error)) {
		error = reg_key_del(parent, n);
	}

	talloc_free(mem_ctx);

	return error;
}

WERROR reg_key_add_abs(TALLOC_CTX *mem_ctx, struct registry_context *ctx, 
					   const char *path, uint32_t access_mask, 
					   struct security_descriptor *sec_desc, 
					   struct registry_key **result)
{
	struct registry_key *parent;
	const char *n;
	WERROR error;
	
	if (!strchr(path, '\\')) {
		return WERR_ALREADY_EXISTS;
	}
	
	error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
	if (!W_ERROR_IS_OK(error)) {
		DEBUG(2, ("Opening parent of %s failed with %s\n", path, 
				  win_errstr(error)));
		return error;
	}

	error = reg_key_add_name(mem_ctx, parent, n, NULL, sec_desc, result);

	return error;
}