Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 : Transparent registry backend handling
4 : Copyright (C) Jelmer Vernooij 2003-2007.
5 : Copyright (C) Wilco Baan Hofman 2010.
6 :
7 : This program is free software; you can redistribute it and/or modify
8 : it under the terms of the GNU General Public License as published by
9 : the Free Software Foundation; either version 3 of the License, or
10 : (at your option) any later version.
11 :
12 : This program is distributed in the hope that it will be useful,
13 : but WITHOUT ANY WARRANTY; without even the implied warranty of
14 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 : GNU General Public License for more details.
16 :
17 : You should have received a copy of the GNU General Public License
18 : along with this program. If not, see <http://www.gnu.org/licenses/>.
19 : */
20 :
21 : #include "includes.h"
22 : #include "lib/registry/registry.h"
23 : #include "librpc/gen_ndr/winreg.h"
24 : #include "lib/util/data_blob.h"
25 :
26 0 : _PUBLIC_ char *reg_val_data_string(TALLOC_CTX *mem_ctx, uint32_t type,
27 : const DATA_BLOB data)
28 : {
29 0 : size_t converted_size = 0;
30 0 : char *ret = NULL;
31 :
32 0 : if (data.length == 0)
33 0 : return talloc_strdup(mem_ctx, "");
34 :
35 0 : switch (type) {
36 0 : case REG_EXPAND_SZ:
37 : case REG_SZ:
38 0 : convert_string_talloc(mem_ctx,
39 : CH_UTF16, CH_UNIX,
40 0 : data.data, data.length,
41 : (void **)&ret, &converted_size);
42 0 : break;
43 0 : case REG_DWORD:
44 : case REG_DWORD_BIG_ENDIAN:
45 0 : SMB_ASSERT(data.length == sizeof(uint32_t));
46 0 : ret = talloc_asprintf(mem_ctx, "0x%8.8x",
47 0 : IVAL(data.data, 0));
48 0 : break;
49 0 : case REG_QWORD:
50 0 : SMB_ASSERT(data.length == sizeof(uint64_t));
51 0 : ret = talloc_asprintf(mem_ctx, "0x%16.16llx",
52 0 : (long long)BVAL(data.data, 0));
53 0 : break;
54 0 : case REG_BINARY:
55 0 : ret = data_blob_hex_string_upper(mem_ctx, &data);
56 0 : break;
57 0 : case REG_NONE:
58 : /* "NULL" is the right return value */
59 0 : break;
60 0 : case REG_MULTI_SZ:
61 : /* FIXME: We don't support this yet */
62 0 : break;
63 0 : default:
64 : /* FIXME */
65 : /* Other datatypes aren't supported -> return "NULL" */
66 0 : break;
67 : }
68 :
69 0 : return ret;
70 : }
71 :
72 : /** Generate a string that describes a registry value */
73 0 : _PUBLIC_ char *reg_val_description(TALLOC_CTX *mem_ctx,
74 : const char *name,
75 : uint32_t data_type,
76 : const DATA_BLOB data)
77 : {
78 0 : return talloc_asprintf(mem_ctx, "%s = %s : %s", name?name:"<No Name>",
79 : str_regtype(data_type),
80 : reg_val_data_string(mem_ctx, data_type, data));
81 : }
82 :
83 : /*
84 : * This implements reading hex bytes that include comma's.
85 : * It was previously handled by strhex_to_data_blob, but that did not cover
86 : * the format used by windows.
87 : */
88 0 : static DATA_BLOB reg_strhex_to_data_blob(TALLOC_CTX *mem_ctx, const char *str)
89 : {
90 : DATA_BLOB ret;
91 0 : const char *HEXCHARS = "0123456789ABCDEF";
92 : size_t i, j;
93 : char *hi, *lo;
94 :
95 0 : ret = data_blob_talloc_zero(mem_ctx, (strlen(str)+(strlen(str) % 3))/3);
96 0 : j = 0;
97 0 : for (i = 0; i < strlen(str); i++) {
98 0 : hi = strchr(HEXCHARS, toupper(str[i]));
99 0 : if (hi == NULL)
100 0 : continue;
101 :
102 0 : i++;
103 0 : lo = strchr(HEXCHARS, toupper(str[i]));
104 0 : if (lo == NULL)
105 0 : break;
106 :
107 0 : ret.data[j] = PTR_DIFF(hi, HEXCHARS) << 4;
108 0 : ret.data[j] += PTR_DIFF(lo, HEXCHARS);
109 0 : j++;
110 :
111 0 : if (j > ret.length) {
112 0 : DEBUG(0, ("Trouble converting hex string to bin\n"));
113 0 : break;
114 : }
115 : }
116 0 : return ret;
117 : }
118 :
119 :
120 441 : _PUBLIC_ bool reg_string_to_val(TALLOC_CTX *mem_ctx, const char *type_str,
121 : const char *data_str, uint32_t *type, DATA_BLOB *data)
122 : {
123 : char *tmp_type_str, *p, *q;
124 : int result;
125 :
126 441 : *type = regtype_by_string(type_str);
127 :
128 441 : if (*type == -1) {
129 : /* Normal windows format is hex, hex(type int as string),
130 : dword or just a string. */
131 147 : if (strncmp(type_str, "hex(", 4) == 0) {
132 : /* there is a hex string with the value type between
133 : the braces */
134 0 : tmp_type_str = talloc_strdup(mem_ctx, type_str);
135 0 : q = p = tmp_type_str + strlen("hex(");
136 :
137 : /* Go to the closing brace or end of the string */
138 0 : while (*q != ')' && *q != '\0') q++;
139 0 : *q = '\0';
140 :
141 : /* Convert hex string to int, store it in type */
142 0 : result = sscanf(p, "%x", type);
143 0 : if (!result) {
144 0 : DEBUG(0, ("Could not convert hex to int\n"));
145 0 : return false;
146 : }
147 0 : talloc_free(tmp_type_str);
148 147 : } else if (strcmp(type_str, "hex") == 0) {
149 0 : *type = REG_BINARY;
150 147 : } else if (strcmp(type_str, "dword") == 0) {
151 147 : *type = REG_DWORD;
152 : }
153 : }
154 :
155 441 : if (*type == -1)
156 0 : return false;
157 :
158 : /* Convert data appropriately */
159 :
160 441 : switch (*type) {
161 294 : case REG_SZ:
162 554 : return convert_string_talloc(mem_ctx,
163 : CH_UNIX, CH_UTF16,
164 294 : data_str, strlen(data_str)+1,
165 294 : (void **)&data->data,
166 : &data->length);
167 : break;
168 0 : case REG_MULTI_SZ:
169 : case REG_EXPAND_SZ:
170 : case REG_BINARY:
171 0 : *data = reg_strhex_to_data_blob(mem_ctx, data_str);
172 0 : break;
173 147 : case REG_DWORD:
174 : case REG_DWORD_BIG_ENDIAN: {
175 147 : uint32_t tmp = strtol(data_str, NULL, 16);
176 147 : *data = data_blob_talloc(mem_ctx, NULL, sizeof(uint32_t));
177 147 : if (data->data == NULL) return false;
178 147 : SIVAL(data->data, 0, tmp);
179 : }
180 147 : break;
181 0 : case REG_QWORD: {
182 0 : uint64_t tmp = strtoll(data_str, NULL, 16);
183 0 : *data = data_blob_talloc(mem_ctx, NULL, sizeof(uint64_t));
184 0 : if (data->data == NULL) return false;
185 0 : SBVAL(data->data, 0, tmp);
186 : }
187 0 : break;
188 0 : case REG_NONE:
189 0 : ZERO_STRUCTP(data);
190 0 : break;
191 0 : default:
192 : /* FIXME */
193 : /* Other datatypes aren't supported -> return no success */
194 0 : return false;
195 : }
196 147 : return true;
197 : }
198 :
199 : /** Open a key by name (including the predefined key name!) */
200 8085 : WERROR reg_open_key_abs(TALLOC_CTX *mem_ctx, struct registry_context *handle,
201 : const char *name, struct registry_key **result)
202 : {
203 : struct registry_key *predef;
204 : WERROR error;
205 : size_t predeflength;
206 : char *predefname;
207 :
208 8085 : if (strchr(name, '\\') != NULL)
209 5586 : predeflength = strchr(name, '\\')-name;
210 : else
211 2499 : predeflength = strlen(name);
212 :
213 8085 : predefname = talloc_strndup(mem_ctx, name, predeflength);
214 8085 : W_ERROR_HAVE_NO_MEMORY(predefname);
215 8085 : error = reg_get_predefined_key_by_name(handle, predefname, &predef);
216 8085 : talloc_free(predefname);
217 :
218 8085 : if (!W_ERROR_IS_OK(error)) {
219 0 : return error;
220 : }
221 :
222 8085 : if (strchr(name, '\\')) {
223 5586 : return reg_open_key(mem_ctx, predef, strchr(name, '\\')+1,
224 : result);
225 : } else {
226 2499 : *result = predef;
227 2499 : return WERR_OK;
228 : }
229 : }
230 :
231 7644 : static WERROR get_abs_parent(TALLOC_CTX *mem_ctx, struct registry_context *ctx,
232 : const char *path, struct registry_key **parent,
233 : const char **name)
234 : {
235 : char *parent_name;
236 : WERROR error;
237 :
238 7644 : if (strchr(path, '\\') == NULL) {
239 0 : return WERR_FOOBAR;
240 : }
241 :
242 7644 : parent_name = talloc_strndup(mem_ctx, path, strrchr(path, '\\')-path);
243 7644 : W_ERROR_HAVE_NO_MEMORY(parent_name);
244 7644 : error = reg_open_key_abs(mem_ctx, ctx, parent_name, parent);
245 7644 : talloc_free(parent_name);
246 7644 : if (!W_ERROR_IS_OK(error)) {
247 0 : return error;
248 : }
249 :
250 7644 : *name = talloc_strdup(mem_ctx, strrchr(path, '\\')+1);
251 7644 : W_ERROR_HAVE_NO_MEMORY(*name);
252 :
253 7644 : return WERR_OK;
254 : }
255 :
256 0 : WERROR reg_key_del_abs(struct registry_context *ctx, const char *path)
257 : {
258 : struct registry_key *parent;
259 : const char *n;
260 0 : TALLOC_CTX *mem_ctx = talloc_init("reg_key_del_abs");
261 : WERROR error;
262 :
263 0 : if (!strchr(path, '\\')) {
264 0 : return WERR_FOOBAR;
265 : }
266 :
267 0 : error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
268 0 : if (W_ERROR_IS_OK(error)) {
269 0 : error = reg_key_del(mem_ctx, parent, n);
270 : }
271 :
272 0 : talloc_free(mem_ctx);
273 :
274 0 : return error;
275 : }
276 :
277 10584 : WERROR reg_key_add_abs(TALLOC_CTX *mem_ctx, struct registry_context *ctx,
278 : const char *path, uint32_t access_mask,
279 : struct security_descriptor *sec_desc,
280 : struct registry_key **result)
281 : {
282 : struct registry_key *parent;
283 : const char *n;
284 : WERROR error;
285 :
286 10584 : *result = NULL;
287 :
288 10584 : if (!strchr(path, '\\')) {
289 2940 : return WERR_ALREADY_EXISTS;
290 : }
291 :
292 7644 : error = get_abs_parent(mem_ctx, ctx, path, &parent, &n);
293 7644 : if (!W_ERROR_IS_OK(error)) {
294 0 : DEBUG(2, ("Opening parent of %s failed with %s\n", path,
295 : win_errstr(error)));
296 0 : return error;
297 : }
298 :
299 7644 : error = reg_key_add_name(mem_ctx, parent, n, NULL, sec_desc, result);
300 :
301 7644 : return error;
302 : }
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