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1 | /** @file\r | |
2 | Implementation functions and structures for var check protocol.\r | |
3 | \r | |
4 | Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials \r | |
6 | are licensed and made available under the terms and conditions of the BSD License \r | |
7 | which accompanies this distribution. The full text of the license may be found at \r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "Variable.h"\r | |
16 | #include <Library/DevicePathLib.h>\r | |
17 | \r | |
18 | extern LIST_ENTRY mLockedVariableList;\r | |
19 | extern BOOLEAN mEndOfDxe;\r | |
20 | extern BOOLEAN mEnableLocking;\r | |
21 | \r | |
22 | #define VAR_CHECK_HANDLER_TABLE_SIZE 0x8\r | |
23 | \r | |
24 | UINT32 mNumberOfHandler = 0;\r | |
25 | UINT32 mMaxNumberOfHandler = 0;\r | |
26 | VAR_CHECK_SET_VARIABLE_CHECK_HANDLER *mHandlerTable = NULL;\r | |
27 | \r | |
28 | typedef struct {\r | |
29 | LIST_ENTRY Link;\r | |
30 | EFI_GUID Guid;\r | |
31 | VAR_CHECK_VARIABLE_PROPERTY VariableProperty;\r | |
32 | //CHAR16 *Name;\r | |
33 | } VAR_CHECK_VARIABLE_ENTRY;\r | |
34 | \r | |
35 | LIST_ENTRY mVarCheckVariableList = INITIALIZE_LIST_HEAD_VARIABLE (mVarCheckVariableList);\r | |
36 | \r | |
37 | typedef\r | |
38 | EFI_STATUS\r | |
39 | (EFIAPI *INTERNAL_VAR_CHECK_FUNCTION) (\r | |
40 | IN VAR_CHECK_VARIABLE_PROPERTY *Propery,\r | |
41 | IN UINTN DataSize,\r | |
42 | IN VOID *Data\r | |
43 | );\r | |
44 | \r | |
45 | typedef struct {\r | |
46 | CHAR16 *Name;\r | |
47 | VAR_CHECK_VARIABLE_PROPERTY VariableProperty;\r | |
48 | INTERNAL_VAR_CHECK_FUNCTION CheckFunction;\r | |
49 | } UEFI_DEFINED_VARIABLE_ENTRY;\r | |
50 | \r | |
51 | /**\r | |
52 | Internal check for load option.\r | |
53 | \r | |
54 | @param[in] VariablePropery Pointer to variable property.\r | |
55 | @param[in] DataSize Data size.\r | |
56 | @param[in] Data Pointer to data buffer.\r | |
57 | \r | |
58 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
59 | @retval EFI_INVALID_PARAMETER The data buffer is not a valid load option.\r | |
60 | \r | |
61 | **/\r | |
62 | EFI_STATUS\r | |
63 | EFIAPI\r | |
64 | InternalVarCheckLoadOption (\r | |
65 | IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,\r | |
66 | IN UINTN DataSize,\r | |
67 | IN VOID *Data\r | |
68 | )\r | |
69 | {\r | |
70 | UINT16 FilePathListLength;\r | |
71 | CHAR16 *Description;\r | |
72 | EFI_DEVICE_PATH_PROTOCOL *FilePathList;\r | |
73 | \r | |
74 | FilePathListLength = *((UINT16 *) ((UINTN) Data + sizeof (UINT32)));\r | |
75 | \r | |
76 | //\r | |
77 | // Check Description\r | |
78 | //\r | |
79 | Description = (CHAR16 *) ((UINTN) Data + sizeof (UINT32) + sizeof (UINT16));\r | |
80 | while (Description < (CHAR16 *) ((UINTN) Data + DataSize)) {\r | |
81 | if (*Description == L'\0') {\r | |
82 | break;\r | |
83 | }\r | |
84 | Description++;\r | |
85 | }\r | |
86 | if ((UINTN) Description >= ((UINTN) Data + DataSize)) {\r | |
87 | return EFI_INVALID_PARAMETER;\r | |
88 | }\r | |
89 | Description++;\r | |
90 | \r | |
91 | //\r | |
92 | // Check FilePathList\r | |
93 | //\r | |
94 | FilePathList = (EFI_DEVICE_PATH_PROTOCOL *) Description;\r | |
95 | if ((UINTN) FilePathList > (MAX_ADDRESS - FilePathListLength)) {\r | |
96 | return EFI_INVALID_PARAMETER;\r | |
97 | }\r | |
98 | if (((UINTN) FilePathList + FilePathListLength) > ((UINTN) Data + DataSize)) {\r | |
99 | return EFI_INVALID_PARAMETER;\r | |
100 | }\r | |
101 | if (FilePathListLength < sizeof (EFI_DEVICE_PATH_PROTOCOL)) {\r | |
102 | return EFI_INVALID_PARAMETER;\r | |
103 | }\r | |
104 | if (!IsDevicePathValid (FilePathList, FilePathListLength)) {\r | |
105 | return EFI_INVALID_PARAMETER;\r | |
106 | }\r | |
107 | \r | |
108 | return EFI_SUCCESS;\r | |
109 | }\r | |
110 | \r | |
111 | /**\r | |
112 | Internal check for key option.\r | |
113 | \r | |
114 | @param[in] VariablePropery Pointer to variable property.\r | |
115 | @param[in] DataSize Data size.\r | |
116 | @param[in] Data Pointer to data buffer.\r | |
117 | \r | |
118 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
119 | @retval EFI_INVALID_PARAMETER The data buffer is not a valid key option.\r | |
120 | \r | |
121 | **/\r | |
122 | EFI_STATUS\r | |
123 | EFIAPI\r | |
124 | InternalVarCheckKeyOption (\r | |
125 | IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,\r | |
126 | IN UINTN DataSize,\r | |
127 | IN VOID *Data\r | |
128 | )\r | |
129 | {\r | |
130 | if (((DataSize - sizeof (EFI_KEY_OPTION)) % sizeof (EFI_INPUT_KEY)) != 0) {\r | |
131 | return EFI_INVALID_PARAMETER;\r | |
132 | }\r | |
133 | \r | |
134 | return EFI_SUCCESS;\r | |
135 | }\r | |
136 | \r | |
137 | /**\r | |
138 | Internal check for device path.\r | |
139 | \r | |
140 | @param[in] VariablePropery Pointer to variable property.\r | |
141 | @param[in] DataSize Data size.\r | |
142 | @param[in] Data Pointer to data buffer.\r | |
143 | \r | |
144 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
145 | @retval EFI_INVALID_PARAMETER The data buffer is not a valid device path.\r | |
146 | \r | |
147 | **/\r | |
148 | EFI_STATUS\r | |
149 | EFIAPI\r | |
150 | InternalVarCheckDevicePath (\r | |
151 | IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,\r | |
152 | IN UINTN DataSize,\r | |
153 | IN VOID *Data\r | |
154 | )\r | |
155 | {\r | |
156 | if (!IsDevicePathValid ((EFI_DEVICE_PATH_PROTOCOL *) Data, DataSize)) {\r | |
157 | return EFI_INVALID_PARAMETER;\r | |
158 | }\r | |
159 | return EFI_SUCCESS;\r | |
160 | }\r | |
161 | \r | |
162 | /**\r | |
163 | Internal check for ASCII string.\r | |
164 | \r | |
165 | @param[in] VariablePropery Pointer to variable property.\r | |
166 | @param[in] DataSize Data size.\r | |
167 | @param[in] Data Pointer to data buffer.\r | |
168 | \r | |
169 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
170 | @retval EFI_INVALID_PARAMETER The data buffer is not a Null-terminated ASCII string.\r | |
171 | \r | |
172 | **/\r | |
173 | EFI_STATUS\r | |
174 | EFIAPI\r | |
175 | InternalVarCheckAsciiString (\r | |
176 | IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,\r | |
177 | IN UINTN DataSize,\r | |
178 | IN VOID *Data\r | |
179 | )\r | |
180 | {\r | |
181 | CHAR8 *String;\r | |
182 | UINTN Index;\r | |
183 | \r | |
184 | String = (CHAR8 *) Data;\r | |
185 | if (String[DataSize - 1] == '\0') {\r | |
186 | return EFI_SUCCESS;\r | |
187 | } else {\r | |
188 | for (Index = 1; Index < DataSize && (String[DataSize - 1 - Index] != '\0'); Index++);\r | |
189 | if (Index == DataSize) {\r | |
190 | return EFI_INVALID_PARAMETER;\r | |
191 | }\r | |
192 | }\r | |
193 | return EFI_SUCCESS;\r | |
194 | }\r | |
195 | \r | |
196 | /**\r | |
197 | Internal check for size array.\r | |
198 | \r | |
199 | @param[in] VariablePropery Pointer to variable property.\r | |
200 | @param[in] DataSize Data size.\r | |
201 | @param[in] Data Pointer to data buffer.\r | |
202 | \r | |
203 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
204 | @retval EFI_INVALID_PARAMETER The DataSize is not size array.\r | |
205 | \r | |
206 | **/\r | |
207 | EFI_STATUS\r | |
208 | EFIAPI\r | |
209 | InternalVarCheckSizeArray (\r | |
210 | IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,\r | |
211 | IN UINTN DataSize,\r | |
212 | IN VOID *Data\r | |
213 | )\r | |
214 | {\r | |
215 | if ((DataSize % VariablePropery->MinSize) != 0) {\r | |
216 | return EFI_INVALID_PARAMETER;\r | |
217 | }\r | |
218 | return EFI_SUCCESS;\r | |
219 | }\r | |
220 | \r | |
221 | //\r | |
222 | // To prevent name collisions with possible future globally defined variables,\r | |
223 | // other internal firmware data variables that are not defined here must be\r | |
224 | // saved with a unique VendorGuid other than EFI_GLOBAL_VARIABLE or\r | |
225 | // any other GUID defined by the UEFI Specification. Implementations must\r | |
226 | // only permit the creation of variables with a UEFI Specification-defined\r | |
227 | // VendorGuid when these variables are documented in the UEFI Specification.\r | |
228 | //\r | |
229 | UEFI_DEFINED_VARIABLE_ENTRY mGlobalVariableList[] = {\r | |
230 | {\r | |
231 | EFI_LANG_CODES_VARIABLE_NAME,\r | |
232 | {\r | |
233 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
234 | 0,\r | |
235 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
236 | 1,\r | |
237 | MAX_UINTN\r | |
238 | },\r | |
239 | InternalVarCheckAsciiString\r | |
240 | },\r | |
241 | {\r | |
242 | EFI_LANG_VARIABLE_NAME,\r | |
243 | {\r | |
244 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
245 | 0,\r | |
246 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
247 | 1,\r | |
248 | MAX_UINTN\r | |
249 | },\r | |
250 | InternalVarCheckAsciiString\r | |
251 | },\r | |
252 | {\r | |
253 | EFI_TIME_OUT_VARIABLE_NAME,\r | |
254 | {\r | |
255 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
256 | 0,\r | |
257 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
258 | sizeof (UINT16),\r | |
259 | sizeof (UINT16)\r | |
260 | },\r | |
261 | NULL\r | |
262 | },\r | |
263 | {\r | |
264 | EFI_PLATFORM_LANG_CODES_VARIABLE_NAME,\r | |
265 | {\r | |
266 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
267 | 0,\r | |
268 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
269 | 1,\r | |
270 | MAX_UINTN\r | |
271 | },\r | |
272 | InternalVarCheckAsciiString\r | |
273 | },\r | |
274 | {\r | |
275 | EFI_PLATFORM_LANG_VARIABLE_NAME,\r | |
276 | {\r | |
277 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
278 | 0,\r | |
279 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
280 | 1,\r | |
281 | MAX_UINTN\r | |
282 | },\r | |
283 | InternalVarCheckAsciiString\r | |
284 | },\r | |
285 | {\r | |
286 | EFI_CON_IN_VARIABLE_NAME,\r | |
287 | {\r | |
288 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
289 | 0,\r | |
290 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
291 | sizeof (EFI_DEVICE_PATH_PROTOCOL),\r | |
292 | MAX_UINTN\r | |
293 | },\r | |
294 | InternalVarCheckDevicePath\r | |
295 | },\r | |
296 | {\r | |
297 | EFI_CON_OUT_VARIABLE_NAME,\r | |
298 | {\r | |
299 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
300 | 0,\r | |
301 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
302 | sizeof (EFI_DEVICE_PATH_PROTOCOL),\r | |
303 | MAX_UINTN\r | |
304 | },\r | |
305 | InternalVarCheckDevicePath\r | |
306 | },\r | |
307 | {\r | |
308 | EFI_ERR_OUT_VARIABLE_NAME,\r | |
309 | {\r | |
310 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
311 | 0,\r | |
312 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
313 | sizeof (EFI_DEVICE_PATH_PROTOCOL),\r | |
314 | MAX_UINTN\r | |
315 | },\r | |
316 | InternalVarCheckDevicePath\r | |
317 | },\r | |
318 | {\r | |
319 | EFI_CON_IN_DEV_VARIABLE_NAME,\r | |
320 | {\r | |
321 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
322 | 0,\r | |
323 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
324 | sizeof (EFI_DEVICE_PATH_PROTOCOL),\r | |
325 | MAX_UINTN\r | |
326 | },\r | |
327 | InternalVarCheckDevicePath\r | |
328 | },\r | |
329 | {\r | |
330 | EFI_CON_OUT_DEV_VARIABLE_NAME,\r | |
331 | {\r | |
332 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
333 | 0,\r | |
334 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
335 | sizeof (EFI_DEVICE_PATH_PROTOCOL),\r | |
336 | MAX_UINTN\r | |
337 | },\r | |
338 | InternalVarCheckDevicePath\r | |
339 | },\r | |
340 | {\r | |
341 | EFI_ERR_OUT_DEV_VARIABLE_NAME,\r | |
342 | {\r | |
343 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
344 | 0,\r | |
345 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
346 | sizeof (EFI_DEVICE_PATH_PROTOCOL),\r | |
347 | MAX_UINTN\r | |
348 | },\r | |
349 | InternalVarCheckDevicePath\r | |
350 | },\r | |
351 | {\r | |
352 | EFI_BOOT_ORDER_VARIABLE_NAME,\r | |
353 | {\r | |
354 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
355 | 0,\r | |
356 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
357 | sizeof (UINT16),\r | |
358 | MAX_UINTN\r | |
359 | },\r | |
360 | InternalVarCheckSizeArray\r | |
361 | },\r | |
362 | {\r | |
363 | EFI_BOOT_NEXT_VARIABLE_NAME,\r | |
364 | {\r | |
365 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
366 | 0,\r | |
367 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
368 | sizeof (UINT16),\r | |
369 | sizeof (UINT16)\r | |
370 | },\r | |
371 | NULL\r | |
372 | },\r | |
373 | {\r | |
374 | EFI_BOOT_CURRENT_VARIABLE_NAME,\r | |
375 | {\r | |
376 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
377 | 0,\r | |
378 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
379 | sizeof (UINT16),\r | |
380 | sizeof (UINT16)\r | |
381 | },\r | |
382 | NULL\r | |
383 | },\r | |
384 | {\r | |
385 | EFI_BOOT_OPTION_SUPPORT_VARIABLE_NAME,\r | |
386 | {\r | |
387 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
388 | 0,\r | |
389 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
390 | sizeof (UINT32),\r | |
391 | sizeof (UINT32)\r | |
392 | },\r | |
393 | NULL\r | |
394 | },\r | |
395 | {\r | |
396 | EFI_DRIVER_ORDER_VARIABLE_NAME,\r | |
397 | {\r | |
398 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
399 | 0,\r | |
400 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
401 | sizeof (UINT16),\r | |
402 | MAX_UINTN\r | |
403 | },\r | |
404 | InternalVarCheckSizeArray\r | |
405 | },\r | |
406 | {\r | |
407 | EFI_HW_ERR_REC_SUPPORT_VARIABLE_NAME,\r | |
408 | {\r | |
409 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
410 | 0,\r | |
411 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
412 | sizeof (UINT16),\r | |
413 | sizeof (UINT16)\r | |
414 | },\r | |
415 | NULL\r | |
416 | },\r | |
417 | {\r | |
418 | EFI_SETUP_MODE_NAME,\r | |
419 | {\r | |
420 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
421 | VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,\r | |
422 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
423 | sizeof (UINT8),\r | |
424 | sizeof (UINT8)\r | |
425 | },\r | |
426 | NULL\r | |
427 | },\r | |
428 | {\r | |
429 | EFI_KEY_EXCHANGE_KEY_NAME,\r | |
430 | {\r | |
431 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
432 | 0,\r | |
433 | VARIABLE_ATTRIBUTE_NV_BS_RT_AT,\r | |
434 | 1,\r | |
435 | MAX_UINTN\r | |
436 | },\r | |
437 | NULL\r | |
438 | },\r | |
439 | {\r | |
440 | EFI_PLATFORM_KEY_NAME,\r | |
441 | {\r | |
442 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
443 | 0,\r | |
444 | VARIABLE_ATTRIBUTE_NV_BS_RT_AT,\r | |
445 | 1,\r | |
446 | MAX_UINTN\r | |
447 | },\r | |
448 | NULL\r | |
449 | },\r | |
450 | {\r | |
451 | EFI_SIGNATURE_SUPPORT_NAME,\r | |
452 | {\r | |
453 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
454 | VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,\r | |
455 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
456 | sizeof (EFI_GUID),\r | |
457 | MAX_UINTN\r | |
458 | },\r | |
459 | InternalVarCheckSizeArray\r | |
460 | },\r | |
461 | {\r | |
462 | EFI_SECURE_BOOT_MODE_NAME,\r | |
463 | {\r | |
464 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
465 | VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,\r | |
466 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
467 | sizeof (UINT8),\r | |
468 | sizeof (UINT8)\r | |
469 | },\r | |
470 | NULL\r | |
471 | },\r | |
472 | {\r | |
473 | EFI_KEK_DEFAULT_VARIABLE_NAME,\r | |
474 | {\r | |
475 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
476 | VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,\r | |
477 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
478 | 1,\r | |
479 | MAX_UINTN\r | |
480 | },\r | |
481 | NULL\r | |
482 | },\r | |
483 | {\r | |
484 | EFI_PK_DEFAULT_VARIABLE_NAME,\r | |
485 | {\r | |
486 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
487 | VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,\r | |
488 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
489 | 1,\r | |
490 | MAX_UINTN\r | |
491 | },\r | |
492 | NULL\r | |
493 | },\r | |
494 | {\r | |
495 | EFI_DB_DEFAULT_VARIABLE_NAME,\r | |
496 | {\r | |
497 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
498 | VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,\r | |
499 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
500 | 1,\r | |
501 | MAX_UINTN\r | |
502 | },\r | |
503 | NULL\r | |
504 | },\r | |
505 | {\r | |
506 | EFI_DBX_DEFAULT_VARIABLE_NAME,\r | |
507 | {\r | |
508 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
509 | VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,\r | |
510 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
511 | 1,\r | |
512 | MAX_UINTN\r | |
513 | },\r | |
514 | NULL\r | |
515 | },\r | |
516 | {\r | |
517 | EFI_DBT_DEFAULT_VARIABLE_NAME,\r | |
518 | {\r | |
519 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
520 | VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,\r | |
521 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
522 | 1,\r | |
523 | MAX_UINTN\r | |
524 | },\r | |
525 | NULL\r | |
526 | },\r | |
527 | {\r | |
528 | EFI_OS_INDICATIONS_SUPPORT_VARIABLE_NAME,\r | |
529 | {\r | |
530 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
531 | 0,\r | |
532 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
533 | sizeof (UINT64),\r | |
534 | sizeof (UINT64)\r | |
535 | },\r | |
536 | NULL\r | |
537 | },\r | |
538 | {\r | |
539 | EFI_OS_INDICATIONS_VARIABLE_NAME,\r | |
540 | {\r | |
541 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
542 | 0,\r | |
543 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
544 | sizeof (UINT64),\r | |
545 | sizeof (UINT64)\r | |
546 | },\r | |
547 | NULL\r | |
548 | },\r | |
549 | {\r | |
550 | EFI_VENDOR_KEYS_VARIABLE_NAME,\r | |
551 | {\r | |
552 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
553 | VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,\r | |
554 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
555 | sizeof (UINT8),\r | |
556 | sizeof (UINT8)\r | |
557 | },\r | |
558 | NULL\r | |
559 | },\r | |
560 | };\r | |
561 | UEFI_DEFINED_VARIABLE_ENTRY mGlobalVariableList2[] = {\r | |
562 | {\r | |
563 | L"Boot####",\r | |
564 | {\r | |
565 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
566 | 0,\r | |
567 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
568 | sizeof (UINT32) + sizeof (UINT16),\r | |
569 | MAX_UINTN\r | |
570 | },\r | |
571 | InternalVarCheckLoadOption\r | |
572 | },\r | |
573 | {\r | |
574 | L"Driver####",\r | |
575 | {\r | |
576 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
577 | 0,\r | |
578 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
579 | sizeof (UINT32) + sizeof (UINT16),\r | |
580 | MAX_UINTN\r | |
581 | },\r | |
582 | InternalVarCheckLoadOption\r | |
583 | },\r | |
584 | {\r | |
585 | L"Key####",\r | |
586 | {\r | |
587 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
588 | 0,\r | |
589 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
590 | sizeof (EFI_KEY_OPTION),\r | |
591 | sizeof (EFI_KEY_OPTION) + 3 * sizeof (EFI_INPUT_KEY)\r | |
592 | },\r | |
593 | InternalVarCheckKeyOption\r | |
594 | },\r | |
595 | };\r | |
596 | \r | |
597 | //\r | |
598 | // EFI_IMAGE_SECURITY_DATABASE_GUID\r | |
599 | //\r | |
600 | UEFI_DEFINED_VARIABLE_ENTRY mImageSecurityVariableList[] = {\r | |
601 | {\r | |
602 | EFI_IMAGE_SECURITY_DATABASE,\r | |
603 | {\r | |
604 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
605 | 0,\r | |
606 | VARIABLE_ATTRIBUTE_NV_BS_RT_AT,\r | |
607 | 1,\r | |
608 | MAX_UINTN\r | |
609 | },\r | |
610 | NULL\r | |
611 | },\r | |
612 | {\r | |
613 | EFI_IMAGE_SECURITY_DATABASE1,\r | |
614 | {\r | |
615 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
616 | 0,\r | |
617 | VARIABLE_ATTRIBUTE_NV_BS_RT_AT,\r | |
618 | 1,\r | |
619 | MAX_UINTN\r | |
620 | },\r | |
621 | NULL\r | |
622 | },\r | |
623 | {\r | |
624 | EFI_IMAGE_SECURITY_DATABASE2,\r | |
625 | {\r | |
626 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
627 | 0,\r | |
628 | VARIABLE_ATTRIBUTE_NV_BS_RT_AT,\r | |
629 | 1,\r | |
630 | MAX_UINTN\r | |
631 | },\r | |
632 | NULL\r | |
633 | },\r | |
634 | };\r | |
635 | \r | |
636 | typedef struct {\r | |
637 | EFI_GUID *Guid;\r | |
638 | CHAR16 *Name;\r | |
639 | VAR_CHECK_VARIABLE_PROPERTY VariableProperty;\r | |
640 | INTERNAL_VAR_CHECK_FUNCTION CheckFunction;\r | |
641 | } VARIABLE_DRIVER_VARIABLE_ENTRY;\r | |
642 | \r | |
643 | VARIABLE_DRIVER_VARIABLE_ENTRY mVariableDriverVariableList[] = {\r | |
644 | {\r | |
645 | &gEfiSecureBootEnableDisableGuid,\r | |
646 | EFI_SECURE_BOOT_ENABLE_NAME,\r | |
647 | {\r | |
648 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
649 | 0,\r | |
650 | VARIABLE_ATTRIBUTE_NV_BS,\r | |
651 | sizeof (UINT8),\r | |
652 | sizeof (UINT8)\r | |
653 | }\r | |
654 | },\r | |
655 | {\r | |
656 | &gEfiCustomModeEnableGuid,\r | |
657 | EFI_CUSTOM_MODE_NAME,\r | |
658 | {\r | |
659 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
660 | 0,\r | |
661 | VARIABLE_ATTRIBUTE_NV_BS,\r | |
662 | sizeof (UINT8),\r | |
663 | sizeof (UINT8)\r | |
664 | }\r | |
665 | },\r | |
666 | {\r | |
667 | &gEfiVendorKeysNvGuid,\r | |
668 | EFI_VENDOR_KEYS_NV_VARIABLE_NAME,\r | |
669 | {\r | |
670 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
671 | 0,\r | |
672 | VARIABLE_ATTRIBUTE_NV_BS_RT_AT,\r | |
673 | sizeof (UINT8),\r | |
674 | sizeof (UINT8)\r | |
675 | }\r | |
676 | },\r | |
677 | {\r | |
678 | &gEfiAuthenticatedVariableGuid,\r | |
679 | L"AuthVarKeyDatabase",\r | |
680 | {\r | |
681 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
682 | 0,\r | |
683 | VARIABLE_ATTRIBUTE_NV_BS_RT_AW,\r | |
684 | sizeof (UINT8),\r | |
685 | MAX_UINTN\r | |
686 | }\r | |
687 | },\r | |
688 | {\r | |
689 | &gEfiCertDbGuid,\r | |
690 | L"certdb",\r | |
691 | {\r | |
692 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
693 | 0,\r | |
694 | VARIABLE_ATTRIBUTE_NV_BS_RT_AT,\r | |
695 | sizeof (UINT32),\r | |
696 | MAX_UINTN\r | |
697 | }\r | |
698 | },\r | |
699 | {\r | |
700 | &gEdkiiVarErrorFlagGuid,\r | |
701 | VAR_ERROR_FLAG_NAME,\r | |
702 | {\r | |
703 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
704 | VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,\r | |
705 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
706 | sizeof (VAR_ERROR_FLAG),\r | |
707 | sizeof (VAR_ERROR_FLAG)\r | |
708 | }\r | |
709 | },\r | |
710 | };\r | |
711 | \r | |
712 | /**\r | |
713 | Get UEFI defined global variable or image security database variable property.\r | |
714 | The code will check if variable guid is global variable or image security database guid first.\r | |
715 | If yes, further check if variable name is in mGlobalVariableList, mGlobalVariableList2 or mImageSecurityVariableList.\r | |
716 | \r | |
717 | @param[in] VariableName Pointer to variable name.\r | |
718 | @param[in] VendorGuid Variable Vendor Guid.\r | |
719 | @param[in] WildcardMatch Try wildcard match or not.\r | |
720 | @param[out] VariableProperty Pointer to variable property.\r | |
721 | @param[out] VarCheckFunction Pointer to check function.\r | |
722 | \r | |
723 | @retval EFI_SUCCESS Variable is not global variable or image security database variable.\r | |
724 | @retval EFI_INVALID_PARAMETER Variable is global variable or image security database variable, but variable name is not in the lists.\r | |
725 | \r | |
726 | **/\r | |
727 | EFI_STATUS\r | |
728 | GetUefiDefinedVariableProperty (\r | |
729 | IN CHAR16 *VariableName,\r | |
730 | IN EFI_GUID *VendorGuid,\r | |
731 | IN BOOLEAN WildcardMatch,\r | |
732 | OUT VAR_CHECK_VARIABLE_PROPERTY **VariableProperty,\r | |
733 | OUT INTERNAL_VAR_CHECK_FUNCTION *VarCheckFunction OPTIONAL\r | |
734 | )\r | |
735 | {\r | |
736 | UINTN Index;\r | |
737 | UINTN NameLength;\r | |
738 | \r | |
739 | if (CompareGuid (VendorGuid, &gEfiGlobalVariableGuid)) {\r | |
740 | //\r | |
741 | // Try list 1, exactly match.\r | |
742 | //\r | |
743 | for (Index = 0; Index < sizeof (mGlobalVariableList)/sizeof (mGlobalVariableList[0]); Index++) {\r | |
744 | if (StrCmp (mGlobalVariableList[Index].Name, VariableName) == 0) {\r | |
745 | if (VarCheckFunction != NULL) {\r | |
746 | *VarCheckFunction = mGlobalVariableList[Index].CheckFunction;\r | |
747 | }\r | |
748 | *VariableProperty = &mGlobalVariableList[Index].VariableProperty;\r | |
749 | return EFI_SUCCESS;\r | |
750 | }\r | |
751 | }\r | |
752 | \r | |
753 | //\r | |
754 | // Try list 2.\r | |
755 | //\r | |
756 | NameLength = StrLen (VariableName) - 4;\r | |
757 | for (Index = 0; Index < sizeof (mGlobalVariableList2)/sizeof (mGlobalVariableList2[0]); Index++) {\r | |
758 | if (WildcardMatch) {\r | |
759 | if ((StrLen (VariableName) == StrLen (mGlobalVariableList2[Index].Name)) &&\r | |
760 | (StrnCmp (mGlobalVariableList2[Index].Name, VariableName, NameLength) == 0) &&\r | |
761 | IsHexaDecimalDigitCharacter (VariableName[NameLength]) &&\r | |
762 | IsHexaDecimalDigitCharacter (VariableName[NameLength + 1]) &&\r | |
763 | IsHexaDecimalDigitCharacter (VariableName[NameLength + 2]) &&\r | |
764 | IsHexaDecimalDigitCharacter (VariableName[NameLength + 3])) {\r | |
765 | if (VarCheckFunction != NULL) {\r | |
766 | *VarCheckFunction = mGlobalVariableList2[Index].CheckFunction;\r | |
767 | }\r | |
768 | *VariableProperty = &mGlobalVariableList2[Index].VariableProperty;\r | |
769 | return EFI_SUCCESS;\r | |
770 | }\r | |
771 | }\r | |
772 | if (StrCmp (mGlobalVariableList2[Index].Name, VariableName) == 0) {\r | |
773 | if (VarCheckFunction != NULL) {\r | |
774 | *VarCheckFunction = mGlobalVariableList2[Index].CheckFunction;\r | |
775 | }\r | |
776 | *VariableProperty = &mGlobalVariableList2[Index].VariableProperty;\r | |
777 | return EFI_SUCCESS;\r | |
778 | }\r | |
779 | }\r | |
780 | \r | |
781 | //\r | |
782 | // The variable name is not in the lists.\r | |
783 | //\r | |
784 | return EFI_INVALID_PARAMETER;\r | |
785 | }\r | |
786 | \r | |
787 | if (CompareGuid (VendorGuid, &gEfiImageSecurityDatabaseGuid)){\r | |
788 | for (Index = 0; Index < sizeof (mImageSecurityVariableList)/sizeof (mImageSecurityVariableList[0]); Index++) {\r | |
789 | if (StrCmp (mImageSecurityVariableList[Index].Name, VariableName) == 0) {\r | |
790 | if (VarCheckFunction != NULL) {\r | |
791 | *VarCheckFunction = mImageSecurityVariableList[Index].CheckFunction;\r | |
792 | }\r | |
793 | *VariableProperty = &mImageSecurityVariableList[Index].VariableProperty;\r | |
794 | return EFI_SUCCESS;\r | |
795 | }\r | |
796 | }\r | |
797 | \r | |
798 | return EFI_INVALID_PARAMETER;\r | |
799 | }\r | |
800 | \r | |
801 | //\r | |
802 | // It is not global variable or image security database variable.\r | |
803 | //\r | |
804 | return EFI_SUCCESS;\r | |
805 | }\r | |
806 | \r | |
807 | /**\r | |
808 | Get variable property for variables managed by Varaible driver.\r | |
809 | \r | |
810 | @param[in] VariableName Pointer to variable name.\r | |
811 | @param[in] VendorGuid Variable Vendor Guid.\r | |
812 | \r | |
813 | @return Pointer to variable property.\r | |
814 | \r | |
815 | **/\r | |
816 | VAR_CHECK_VARIABLE_PROPERTY *\r | |
817 | GetVariableDriverVariableProperty (\r | |
818 | IN CHAR16 *VariableName,\r | |
819 | IN EFI_GUID *VendorGuid\r | |
820 | )\r | |
821 | {\r | |
822 | UINTN Index;\r | |
823 | \r | |
824 | for (Index = 0; Index < sizeof (mVariableDriverVariableList)/sizeof (mVariableDriverVariableList[0]); Index++) {\r | |
825 | if ((CompareGuid (mVariableDriverVariableList[Index].Guid, VendorGuid)) && (StrCmp (mVariableDriverVariableList[Index].Name, VariableName) == 0)) {\r | |
826 | return &mVariableDriverVariableList[Index].VariableProperty;\r | |
827 | }\r | |
828 | }\r | |
829 | \r | |
830 | return NULL;\r | |
831 | }\r | |
832 | \r | |
833 | /**\r | |
834 | Internal SetVariable check.\r | |
835 | \r | |
836 | @param[in] VariableName Name of Variable to set.\r | |
837 | @param[in] VendorGuid Variable vendor GUID.\r | |
838 | @param[in] Attributes Attribute value of the variable.\r | |
839 | @param[in] DataSize Size of Data to set.\r | |
840 | @param[in] Data Data pointer.\r | |
841 | \r | |
842 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
843 | @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits, name, and GUID was supplied,\r | |
844 | or the DataSize exceeds the minimum or maximum allowed,\r | |
845 | or the Data value is not following UEFI spec for UEFI defined variables.\r | |
846 | @retval EFI_WRITE_PROTECTED The variable in question is read-only.\r | |
847 | @retval Others The return status from check handler.\r | |
848 | \r | |
849 | **/\r | |
850 | EFI_STATUS\r | |
851 | EFIAPI\r | |
852 | InternalVarCheckSetVariableCheck (\r | |
853 | IN CHAR16 *VariableName,\r | |
854 | IN EFI_GUID *VendorGuid,\r | |
855 | IN UINT32 Attributes,\r | |
856 | IN UINTN DataSize,\r | |
857 | IN VOID *Data\r | |
858 | )\r | |
859 | {\r | |
860 | EFI_STATUS Status;\r | |
861 | UINTN Index;\r | |
862 | LIST_ENTRY *Link;\r | |
863 | VAR_CHECK_VARIABLE_ENTRY *Entry;\r | |
864 | CHAR16 *Name;\r | |
865 | VAR_CHECK_VARIABLE_PROPERTY *Property;\r | |
866 | INTERNAL_VAR_CHECK_FUNCTION VarCheckFunction;\r | |
867 | \r | |
868 | if (!mEndOfDxe) {\r | |
869 | //\r | |
870 | // Only do check after End Of Dxe.\r | |
871 | //\r | |
872 | return EFI_SUCCESS;\r | |
873 | }\r | |
874 | \r | |
875 | Property = NULL;\r | |
876 | VarCheckFunction = NULL;\r | |
877 | \r | |
878 | for ( Link = GetFirstNode (&mVarCheckVariableList)\r | |
879 | ; !IsNull (&mVarCheckVariableList, Link)\r | |
880 | ; Link = GetNextNode (&mVarCheckVariableList, Link)\r | |
881 | ) {\r | |
882 | Entry = BASE_CR (Link, VAR_CHECK_VARIABLE_ENTRY, Link);\r | |
883 | Name = (CHAR16 *) ((UINTN) Entry + sizeof (*Entry));\r | |
884 | if (CompareGuid (&Entry->Guid, VendorGuid) && (StrCmp (Name, VariableName) == 0)) {\r | |
885 | Property = &Entry->VariableProperty;\r | |
886 | break;\r | |
887 | }\r | |
888 | }\r | |
889 | if (Property == NULL) {\r | |
890 | Property = GetVariableDriverVariableProperty (VariableName, VendorGuid);\r | |
891 | }\r | |
892 | if (Property == NULL) {\r | |
893 | Status = GetUefiDefinedVariableProperty (VariableName, VendorGuid, TRUE, &Property, &VarCheckFunction);\r | |
894 | if (EFI_ERROR (Status)) {\r | |
895 | DEBUG ((EFI_D_INFO, "[Variable]: Var Check UEFI defined variable fail %r - %g:%s\n", Status, VendorGuid, VariableName));\r | |
896 | return Status;\r | |
897 | }\r | |
898 | }\r | |
899 | if (Property != NULL) {\r | |
900 | if (mEnableLocking && ((Property->Property & VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY) != 0)) {\r | |
901 | DEBUG ((EFI_D_INFO, "[Variable]: Var Check ReadOnly variable fail %r - %g:%s\n", EFI_WRITE_PROTECTED, VendorGuid, VariableName));\r | |
902 | return EFI_WRITE_PROTECTED;\r | |
903 | }\r | |
904 | if (!((((Attributes & EFI_VARIABLE_APPEND_WRITE) == 0) && (DataSize == 0)) || (Attributes == 0))) {\r | |
905 | //\r | |
906 | // Not to delete variable.\r | |
907 | //\r | |
908 | if ((Attributes & (~EFI_VARIABLE_APPEND_WRITE)) != Property->Attributes) {\r | |
909 | DEBUG ((EFI_D_INFO, "[Variable]: Var Check Attributes(0x%08x to 0x%08x) fail %r - %g:%s\n", Property->Attributes, Attributes, EFI_INVALID_PARAMETER, VendorGuid, VariableName));\r | |
910 | return EFI_INVALID_PARAMETER;\r | |
911 | }\r | |
912 | if (DataSize != 0) {\r | |
913 | if ((DataSize < Property->MinSize) || (DataSize > Property->MaxSize)) {\r | |
914 | DEBUG ((EFI_D_INFO, "[Variable]: Var Check DataSize fail(0x%x not in 0x%x - 0x%x) %r - %g:%s\n", DataSize, Property->MinSize, Property->MaxSize, EFI_INVALID_PARAMETER, VendorGuid, VariableName));\r | |
915 | return EFI_INVALID_PARAMETER;\r | |
916 | }\r | |
917 | if (VarCheckFunction != NULL) {\r | |
918 | Status = VarCheckFunction (\r | |
919 | Property,\r | |
920 | DataSize,\r | |
921 | Data\r | |
922 | );\r | |
923 | if (EFI_ERROR (Status)) {\r | |
924 | DEBUG ((EFI_D_INFO, "[Variable]: Internal Var Check function fail %r - %g:%s\n", Status, VendorGuid, VariableName));\r | |
925 | return Status;\r | |
926 | }\r | |
927 | }\r | |
928 | }\r | |
929 | }\r | |
930 | }\r | |
931 | \r | |
932 | for (Index = 0; Index < mNumberOfHandler; Index ++) {\r | |
933 | Status = mHandlerTable[Index] (\r | |
934 | VariableName,\r | |
935 | VendorGuid,\r | |
936 | Attributes,\r | |
937 | DataSize,\r | |
938 | Data\r | |
939 | );\r | |
940 | if (EFI_ERROR (Status)) {\r | |
941 | DEBUG ((EFI_D_INFO, "[Variable]: Var Check handler fail %r - %g:%s\n", Status, VendorGuid, VariableName));\r | |
942 | return Status;\r | |
943 | }\r | |
944 | }\r | |
945 | return EFI_SUCCESS;\r | |
946 | }\r | |
947 | \r | |
948 | /**\r | |
949 | Reallocates more global memory to store the registered handler list.\r | |
950 | \r | |
951 | @retval RETURN_SUCCESS Reallocate memory successfully.\r | |
952 | @retval RETURN_OUT_OF_RESOURCES No enough memory to allocate.\r | |
953 | \r | |
954 | **/\r | |
955 | RETURN_STATUS\r | |
956 | EFIAPI\r | |
957 | ReallocateHandlerTable (\r | |
958 | VOID\r | |
959 | )\r | |
960 | {\r | |
961 | VAR_CHECK_SET_VARIABLE_CHECK_HANDLER *HandlerTable;\r | |
962 | \r | |
963 | //\r | |
964 | // Reallocate memory for check handler table.\r | |
965 | //\r | |
966 | HandlerTable = ReallocateRuntimePool (\r | |
967 | mMaxNumberOfHandler * sizeof (VAR_CHECK_SET_VARIABLE_CHECK_HANDLER), \r | |
968 | (mMaxNumberOfHandler + VAR_CHECK_HANDLER_TABLE_SIZE) * sizeof (VAR_CHECK_SET_VARIABLE_CHECK_HANDLER), \r | |
969 | mHandlerTable\r | |
970 | );\r | |
971 | \r | |
972 | //\r | |
973 | // No enough resource to allocate.\r | |
974 | //\r | |
975 | if (HandlerTable == NULL) {\r | |
976 | return RETURN_OUT_OF_RESOURCES;\r | |
977 | }\r | |
978 | \r | |
979 | mHandlerTable = HandlerTable;\r | |
980 | //\r | |
981 | // Increase max handler number.\r | |
982 | //\r | |
983 | mMaxNumberOfHandler = mMaxNumberOfHandler + VAR_CHECK_HANDLER_TABLE_SIZE;\r | |
984 | return RETURN_SUCCESS;\r | |
985 | }\r | |
986 | \r | |
987 | /**\r | |
988 | Register SetVariable check handler.\r | |
989 | \r | |
990 | @param[in] Handler Pointer to check handler.\r | |
991 | \r | |
992 | @retval EFI_SUCCESS The SetVariable check handler was registered successfully.\r | |
993 | @retval EFI_INVALID_PARAMETER Handler is NULL.\r | |
994 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
995 | already been signaled.\r | |
996 | @retval EFI_OUT_OF_RESOURCES There is not enough resource for the SetVariable check handler register request.\r | |
997 | @retval EFI_UNSUPPORTED This interface is not implemented.\r | |
998 | For example, it is unsupported in VarCheck protocol if both VarCheck and SmmVarCheck protocols are present.\r | |
999 | \r | |
1000 | **/\r | |
1001 | EFI_STATUS\r | |
1002 | EFIAPI\r | |
1003 | VarCheckRegisterSetVariableCheckHandler (\r | |
1004 | IN VAR_CHECK_SET_VARIABLE_CHECK_HANDLER Handler\r | |
1005 | )\r | |
1006 | {\r | |
1007 | EFI_STATUS Status;\r | |
1008 | \r | |
1009 | if (Handler == NULL) {\r | |
1010 | return EFI_INVALID_PARAMETER;\r | |
1011 | }\r | |
1012 | \r | |
1013 | if (mEndOfDxe) {\r | |
1014 | return EFI_ACCESS_DENIED;\r | |
1015 | }\r | |
1016 | \r | |
1017 | DEBUG ((EFI_D_INFO, "RegisterSetVariableCheckHandler - 0x%x\n", Handler));\r | |
1018 | \r | |
1019 | //\r | |
1020 | // Check whether the handler list is enough to store new handler.\r | |
1021 | //\r | |
1022 | if (mNumberOfHandler == mMaxNumberOfHandler) {\r | |
1023 | //\r | |
1024 | // Allocate more resources for new handler.\r | |
1025 | //\r | |
1026 | Status = ReallocateHandlerTable();\r | |
1027 | if (EFI_ERROR (Status)) {\r | |
1028 | return Status;\r | |
1029 | }\r | |
1030 | }\r | |
1031 | \r | |
1032 | //\r | |
1033 | // Register new handler into the handler list.\r | |
1034 | //\r | |
1035 | mHandlerTable[mNumberOfHandler] = Handler;\r | |
1036 | mNumberOfHandler ++;\r | |
1037 | \r | |
1038 | return EFI_SUCCESS;\r | |
1039 | }\r | |
1040 | \r | |
1041 | /**\r | |
1042 | Variable property get function.\r | |
1043 | \r | |
1044 | @param[in] Name Pointer to the variable name.\r | |
1045 | @param[in] Guid Pointer to the vendor GUID.\r | |
1046 | @param[in] WildcardMatch Try wildcard match or not.\r | |
1047 | \r | |
1048 | @return Pointer to the property of variable specified by the Name and Guid.\r | |
1049 | \r | |
1050 | **/\r | |
1051 | VAR_CHECK_VARIABLE_PROPERTY *\r | |
1052 | VariablePropertyGetFunction (\r | |
1053 | IN CHAR16 *Name,\r | |
1054 | IN EFI_GUID *Guid,\r | |
1055 | IN BOOLEAN WildcardMatch\r | |
1056 | )\r | |
1057 | {\r | |
1058 | LIST_ENTRY *Link;\r | |
1059 | VAR_CHECK_VARIABLE_ENTRY *Entry;\r | |
1060 | CHAR16 *VariableName;\r | |
1061 | VAR_CHECK_VARIABLE_PROPERTY *Property;\r | |
1062 | \r | |
1063 | for ( Link = GetFirstNode (&mVarCheckVariableList)\r | |
1064 | ; !IsNull (&mVarCheckVariableList, Link)\r | |
1065 | ; Link = GetNextNode (&mVarCheckVariableList, Link)\r | |
1066 | ) {\r | |
1067 | Entry = BASE_CR (Link, VAR_CHECK_VARIABLE_ENTRY, Link);\r | |
1068 | VariableName = (CHAR16 *) ((UINTN) Entry + sizeof (*Entry));\r | |
1069 | if (CompareGuid (&Entry->Guid, Guid) && (StrCmp (VariableName, Name) == 0)) {\r | |
1070 | return &Entry->VariableProperty;\r | |
1071 | }\r | |
1072 | }\r | |
1073 | \r | |
1074 | Property = GetVariableDriverVariableProperty (Name, Guid);\r | |
1075 | if (Property == NULL) {\r | |
1076 | GetUefiDefinedVariableProperty (Name, Guid, WildcardMatch, &Property, NULL);\r | |
1077 | }\r | |
1078 | \r | |
1079 | return Property;\r | |
1080 | }\r | |
1081 | \r | |
1082 | /**\r | |
1083 | Variable property set.\r | |
1084 | \r | |
1085 | @param[in] Name Pointer to the variable name.\r | |
1086 | @param[in] Guid Pointer to the vendor GUID.\r | |
1087 | @param[in] VariableProperty Pointer to the input variable property.\r | |
1088 | \r | |
1089 | @retval EFI_SUCCESS The property of variable specified by the Name and Guid was set successfully.\r | |
1090 | @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string,\r | |
1091 | or the fields of VariableProperty are not valid.\r | |
1092 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
1093 | already been signaled.\r | |
1094 | @retval EFI_OUT_OF_RESOURCES There is not enough resource for the variable property set request.\r | |
1095 | \r | |
1096 | **/\r | |
1097 | EFI_STATUS\r | |
1098 | EFIAPI\r | |
1099 | VarCheckVariablePropertySet (\r | |
1100 | IN CHAR16 *Name,\r | |
1101 | IN EFI_GUID *Guid,\r | |
1102 | IN VAR_CHECK_VARIABLE_PROPERTY *VariableProperty\r | |
1103 | )\r | |
1104 | {\r | |
1105 | EFI_STATUS Status;\r | |
1106 | VAR_CHECK_VARIABLE_ENTRY *Entry;\r | |
1107 | CHAR16 *VariableName;\r | |
1108 | VAR_CHECK_VARIABLE_PROPERTY *Property;\r | |
1109 | \r | |
1110 | if (Name == NULL || Name[0] == 0 || Guid == NULL) {\r | |
1111 | return EFI_INVALID_PARAMETER;\r | |
1112 | }\r | |
1113 | \r | |
1114 | if (VariableProperty == NULL) {\r | |
1115 | return EFI_INVALID_PARAMETER;\r | |
1116 | }\r | |
1117 | \r | |
1118 | if (VariableProperty->Revision != VAR_CHECK_VARIABLE_PROPERTY_REVISION) {\r | |
1119 | return EFI_INVALID_PARAMETER;\r | |
1120 | }\r | |
1121 | \r | |
1122 | if (mEndOfDxe) {\r | |
1123 | return EFI_ACCESS_DENIED;\r | |
1124 | }\r | |
1125 | \r | |
1126 | Status = EFI_SUCCESS;\r | |
1127 | \r | |
1128 | AcquireLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r | |
1129 | \r | |
1130 | Property = VariablePropertyGetFunction (Name, Guid, FALSE);\r | |
1131 | if (Property != NULL) {\r | |
1132 | CopyMem (Property, VariableProperty, sizeof (*VariableProperty));\r | |
1133 | } else {\r | |
1134 | Entry = AllocateRuntimeZeroPool (sizeof (*Entry) + StrSize (Name));\r | |
1135 | if (Entry == NULL) {\r | |
1136 | Status = EFI_OUT_OF_RESOURCES;\r | |
1137 | goto Done;\r | |
1138 | }\r | |
1139 | VariableName = (CHAR16 *) ((UINTN) Entry + sizeof (*Entry));\r | |
1140 | StrnCpy (VariableName, Name, StrLen (Name));\r | |
1141 | CopyGuid (&Entry->Guid, Guid);\r | |
1142 | CopyMem (&Entry->VariableProperty, VariableProperty, sizeof (*VariableProperty));\r | |
1143 | InsertTailList (&mVarCheckVariableList, &Entry->Link);\r | |
1144 | }\r | |
1145 | \r | |
1146 | Done:\r | |
1147 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r | |
1148 | \r | |
1149 | return Status;\r | |
1150 | }\r | |
1151 | \r | |
1152 | /**\r | |
1153 | Internal variable property get.\r | |
1154 | \r | |
1155 | @param[in] Name Pointer to the variable name.\r | |
1156 | @param[in] Guid Pointer to the vendor GUID.\r | |
1157 | @param[out] VariableProperty Pointer to the output variable property.\r | |
1158 | \r | |
1159 | @retval EFI_SUCCESS The property of variable specified by the Name and Guid was got successfully.\r | |
1160 | @retval EFI_NOT_FOUND The property of variable specified by the Name and Guid was not found.\r | |
1161 | \r | |
1162 | **/\r | |
1163 | EFI_STATUS\r | |
1164 | EFIAPI\r | |
1165 | InternalVarCheckVariablePropertyGet (\r | |
1166 | IN CHAR16 *Name,\r | |
1167 | IN EFI_GUID *Guid,\r | |
1168 | OUT VAR_CHECK_VARIABLE_PROPERTY *VariableProperty\r | |
1169 | )\r | |
1170 | {\r | |
1171 | LIST_ENTRY *Link;\r | |
1172 | VARIABLE_ENTRY *Entry;\r | |
1173 | CHAR16 *VariableName;\r | |
1174 | BOOLEAN Found;\r | |
1175 | VAR_CHECK_VARIABLE_PROPERTY *Property;\r | |
1176 | \r | |
1177 | Found = FALSE;\r | |
1178 | \r | |
1179 | Property = VariablePropertyGetFunction (Name, Guid, TRUE);\r | |
1180 | if (Property != NULL) {\r | |
1181 | CopyMem (VariableProperty, Property, sizeof (*VariableProperty));\r | |
1182 | Found = TRUE;\r | |
1183 | }\r | |
1184 | \r | |
1185 | for ( Link = GetFirstNode (&mLockedVariableList)\r | |
1186 | ; !IsNull (&mLockedVariableList, Link)\r | |
1187 | ; Link = GetNextNode (&mLockedVariableList, Link)\r | |
1188 | ) {\r | |
1189 | Entry = BASE_CR (Link, VARIABLE_ENTRY, Link);\r | |
1190 | VariableName = (CHAR16 *) ((UINTN) Entry + sizeof (*Entry));\r | |
1191 | if (CompareGuid (&Entry->Guid, Guid) && (StrCmp (VariableName, Name) == 0)) {\r | |
1192 | VariableProperty->Property |= VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY;\r | |
1193 | if (!Found) {\r | |
1194 | VariableProperty->Revision = VAR_CHECK_VARIABLE_PROPERTY_REVISION;\r | |
1195 | Found = TRUE;\r | |
1196 | }\r | |
1197 | }\r | |
1198 | }\r | |
1199 | \r | |
1200 | return (Found ? EFI_SUCCESS : EFI_NOT_FOUND);\r | |
1201 | }\r | |
1202 | \r | |
1203 | /**\r | |
1204 | Variable property get.\r | |
1205 | \r | |
1206 | @param[in] Name Pointer to the variable name.\r | |
1207 | @param[in] Guid Pointer to the vendor GUID.\r | |
1208 | @param[out] VariableProperty Pointer to the output variable property.\r | |
1209 | \r | |
1210 | @retval EFI_SUCCESS The property of variable specified by the Name and Guid was got successfully.\r | |
1211 | @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string.\r | |
1212 | @retval EFI_NOT_FOUND The property of variable specified by the Name and Guid was not found.\r | |
1213 | \r | |
1214 | **/\r | |
1215 | EFI_STATUS\r | |
1216 | EFIAPI\r | |
1217 | VarCheckVariablePropertyGet (\r | |
1218 | IN CHAR16 *Name,\r | |
1219 | IN EFI_GUID *Guid,\r | |
1220 | OUT VAR_CHECK_VARIABLE_PROPERTY *VariableProperty\r | |
1221 | )\r | |
1222 | {\r | |
1223 | EFI_STATUS Status;\r | |
1224 | \r | |
1225 | if (Name == NULL || Name[0] == 0 || Guid == NULL) {\r | |
1226 | return EFI_INVALID_PARAMETER;\r | |
1227 | }\r | |
1228 | \r | |
1229 | if (VariableProperty == NULL) {\r | |
1230 | return EFI_INVALID_PARAMETER;\r | |
1231 | }\r | |
1232 | \r | |
1233 | AcquireLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r | |
1234 | \r | |
1235 | Status = InternalVarCheckVariablePropertyGet (Name, Guid, VariableProperty);\r | |
1236 | \r | |
1237 | ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r | |
1238 | \r | |
1239 | return Status;\r | |
1240 | }\r | |
1241 | \r |