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1 | /** @file\r |
2 | Implementation functions and structures for var check uefi library.\r | |
3 | \r | |
8b73a15c | 4 | Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>\r |
b85488b3 SZ |
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 <Library/VarCheckLib.h>\r | |
16 | #include <Library/BaseLib.h>\r | |
17 | #include <Library/BaseMemoryLib.h>\r | |
18 | #include <Library/DebugLib.h>\r | |
19 | #include <Library/DevicePathLib.h>\r | |
20 | \r | |
21 | #include <Guid/VariableFormat.h>\r | |
22 | #include <Guid/GlobalVariable.h>\r | |
23 | #include <Guid/HardwareErrorVariable.h>\r | |
24 | #include <Guid/ImageAuthentication.h>\r | |
25 | \r | |
26 | typedef\r | |
27 | EFI_STATUS\r | |
28 | (EFIAPI *INTERNAL_VAR_CHECK_FUNCTION) (\r | |
29 | IN VAR_CHECK_VARIABLE_PROPERTY *Propery,\r | |
30 | IN UINTN DataSize,\r | |
31 | IN VOID *Data\r | |
32 | );\r | |
33 | \r | |
34 | typedef struct {\r | |
35 | CHAR16 *Name;\r | |
36 | VAR_CHECK_VARIABLE_PROPERTY VariableProperty;\r | |
37 | INTERNAL_VAR_CHECK_FUNCTION CheckFunction;\r | |
38 | } UEFI_DEFINED_VARIABLE_ENTRY;\r | |
39 | \r | |
40 | /**\r | |
41 | Internal check for load option.\r | |
42 | \r | |
43 | @param[in] VariablePropery Pointer to variable property.\r | |
44 | @param[in] DataSize Data size.\r | |
45 | @param[in] Data Pointer to data buffer.\r | |
46 | \r | |
47 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
48 | @retval EFI_INVALID_PARAMETER The data buffer is not a valid load option.\r | |
49 | \r | |
50 | **/\r | |
51 | EFI_STATUS\r | |
52 | EFIAPI\r | |
53 | InternalVarCheckLoadOption (\r | |
54 | IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,\r | |
55 | IN UINTN DataSize,\r | |
56 | IN VOID *Data\r | |
57 | )\r | |
58 | {\r | |
59 | UINT16 FilePathListLength;\r | |
60 | CHAR16 *Description;\r | |
61 | EFI_DEVICE_PATH_PROTOCOL *FilePathList;\r | |
62 | \r | |
63 | FilePathListLength = *((UINT16 *) ((UINTN) Data + sizeof (UINT32)));\r | |
64 | \r | |
65 | //\r | |
66 | // Check Description\r | |
67 | //\r | |
68 | Description = (CHAR16 *) ((UINTN) Data + sizeof (UINT32) + sizeof (UINT16));\r | |
69 | while (Description < (CHAR16 *) ((UINTN) Data + DataSize)) {\r | |
70 | if (*Description == L'\0') {\r | |
71 | break;\r | |
72 | }\r | |
73 | Description++;\r | |
74 | }\r | |
75 | if ((UINTN) Description >= ((UINTN) Data + DataSize)) {\r | |
76 | return EFI_INVALID_PARAMETER;\r | |
77 | }\r | |
78 | Description++;\r | |
79 | \r | |
80 | //\r | |
81 | // Check FilePathList\r | |
82 | //\r | |
83 | FilePathList = (EFI_DEVICE_PATH_PROTOCOL *) Description;\r | |
84 | if ((UINTN) FilePathList > (MAX_ADDRESS - FilePathListLength)) {\r | |
85 | return EFI_INVALID_PARAMETER;\r | |
86 | }\r | |
87 | if (((UINTN) FilePathList + FilePathListLength) > ((UINTN) Data + DataSize)) {\r | |
88 | return EFI_INVALID_PARAMETER;\r | |
89 | }\r | |
90 | if (FilePathListLength < sizeof (EFI_DEVICE_PATH_PROTOCOL)) {\r | |
91 | return EFI_INVALID_PARAMETER;\r | |
92 | }\r | |
93 | if (!IsDevicePathValid (FilePathList, FilePathListLength)) {\r | |
94 | return EFI_INVALID_PARAMETER;\r | |
95 | }\r | |
96 | \r | |
97 | return EFI_SUCCESS;\r | |
98 | }\r | |
99 | \r | |
100 | /**\r | |
101 | Internal check for key option.\r | |
102 | \r | |
103 | @param[in] VariablePropery Pointer to variable property.\r | |
104 | @param[in] DataSize Data size.\r | |
105 | @param[in] Data Pointer to data buffer.\r | |
106 | \r | |
107 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
108 | @retval EFI_INVALID_PARAMETER The data buffer is not a valid key option.\r | |
109 | \r | |
110 | **/\r | |
111 | EFI_STATUS\r | |
112 | EFIAPI\r | |
113 | InternalVarCheckKeyOption (\r | |
114 | IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,\r | |
115 | IN UINTN DataSize,\r | |
116 | IN VOID *Data\r | |
117 | )\r | |
118 | {\r | |
119 | if (((DataSize - sizeof (EFI_KEY_OPTION)) % sizeof (EFI_INPUT_KEY)) != 0) {\r | |
120 | return EFI_INVALID_PARAMETER;\r | |
121 | }\r | |
122 | \r | |
123 | return EFI_SUCCESS;\r | |
124 | }\r | |
125 | \r | |
126 | /**\r | |
127 | Internal check for device path.\r | |
128 | \r | |
129 | @param[in] VariablePropery Pointer to variable property.\r | |
130 | @param[in] DataSize Data size.\r | |
131 | @param[in] Data Pointer to data buffer.\r | |
132 | \r | |
133 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
134 | @retval EFI_INVALID_PARAMETER The data buffer is not a valid device path.\r | |
135 | \r | |
136 | **/\r | |
137 | EFI_STATUS\r | |
138 | EFIAPI\r | |
139 | InternalVarCheckDevicePath (\r | |
140 | IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,\r | |
141 | IN UINTN DataSize,\r | |
142 | IN VOID *Data\r | |
143 | )\r | |
144 | {\r | |
145 | if (!IsDevicePathValid ((EFI_DEVICE_PATH_PROTOCOL *) Data, DataSize)) {\r | |
146 | return EFI_INVALID_PARAMETER;\r | |
147 | }\r | |
148 | return EFI_SUCCESS;\r | |
149 | }\r | |
150 | \r | |
151 | /**\r | |
152 | Internal check for ASCII string.\r | |
153 | \r | |
154 | @param[in] VariablePropery Pointer to variable property.\r | |
155 | @param[in] DataSize Data size.\r | |
156 | @param[in] Data Pointer to data buffer.\r | |
157 | \r | |
158 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
159 | @retval EFI_INVALID_PARAMETER The data buffer is not a Null-terminated ASCII string.\r | |
160 | \r | |
161 | **/\r | |
162 | EFI_STATUS\r | |
163 | EFIAPI\r | |
164 | InternalVarCheckAsciiString (\r | |
165 | IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,\r | |
166 | IN UINTN DataSize,\r | |
167 | IN VOID *Data\r | |
168 | )\r | |
169 | {\r | |
170 | CHAR8 *String;\r | |
171 | UINTN Index;\r | |
172 | \r | |
173 | String = (CHAR8 *) Data;\r | |
174 | if (String[DataSize - 1] == '\0') {\r | |
175 | return EFI_SUCCESS;\r | |
176 | } else {\r | |
177 | for (Index = 1; Index < DataSize && (String[DataSize - 1 - Index] != '\0'); Index++);\r | |
178 | if (Index == DataSize) {\r | |
179 | return EFI_INVALID_PARAMETER;\r | |
180 | }\r | |
181 | }\r | |
182 | return EFI_SUCCESS;\r | |
183 | }\r | |
184 | \r | |
185 | /**\r | |
186 | Internal check for size array.\r | |
187 | \r | |
188 | @param[in] VariablePropery Pointer to variable property.\r | |
189 | @param[in] DataSize Data size.\r | |
190 | @param[in] Data Pointer to data buffer.\r | |
191 | \r | |
192 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
193 | @retval EFI_INVALID_PARAMETER The DataSize is not size array.\r | |
194 | \r | |
195 | **/\r | |
196 | EFI_STATUS\r | |
197 | EFIAPI\r | |
198 | InternalVarCheckSizeArray (\r | |
199 | IN VAR_CHECK_VARIABLE_PROPERTY *VariablePropery,\r | |
200 | IN UINTN DataSize,\r | |
201 | IN VOID *Data\r | |
202 | )\r | |
203 | {\r | |
204 | if ((DataSize % VariablePropery->MinSize) != 0) {\r | |
205 | return EFI_INVALID_PARAMETER;\r | |
206 | }\r | |
207 | return EFI_SUCCESS;\r | |
208 | }\r | |
209 | \r | |
210 | //\r | |
211 | // To prevent name collisions with possible future globally defined variables,\r | |
212 | // other internal firmware data variables that are not defined here must be\r | |
213 | // saved with a unique VendorGuid other than EFI_GLOBAL_VARIABLE or\r | |
214 | // any other GUID defined by the UEFI Specification. Implementations must\r | |
215 | // only permit the creation of variables with a UEFI Specification-defined\r | |
216 | // VendorGuid when these variables are documented in the UEFI Specification.\r | |
217 | //\r | |
218 | UEFI_DEFINED_VARIABLE_ENTRY mGlobalVariableList[] = {\r | |
219 | {\r | |
220 | EFI_LANG_CODES_VARIABLE_NAME,\r | |
221 | {\r | |
222 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
223 | 0,\r | |
224 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
225 | 1,\r | |
226 | MAX_UINTN\r | |
227 | },\r | |
228 | InternalVarCheckAsciiString\r | |
229 | },\r | |
230 | {\r | |
231 | EFI_LANG_VARIABLE_NAME,\r | |
232 | {\r | |
233 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
234 | 0,\r | |
235 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
236 | 1,\r | |
237 | MAX_UINTN\r | |
238 | },\r | |
239 | InternalVarCheckAsciiString\r | |
240 | },\r | |
241 | {\r | |
242 | EFI_TIME_OUT_VARIABLE_NAME,\r | |
243 | {\r | |
244 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
245 | 0,\r | |
246 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
247 | sizeof (UINT16),\r | |
248 | sizeof (UINT16)\r | |
249 | },\r | |
250 | NULL\r | |
251 | },\r | |
252 | {\r | |
253 | EFI_PLATFORM_LANG_CODES_VARIABLE_NAME,\r | |
254 | {\r | |
255 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
256 | 0,\r | |
257 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
258 | 1,\r | |
259 | MAX_UINTN\r | |
260 | },\r | |
261 | InternalVarCheckAsciiString\r | |
262 | },\r | |
263 | {\r | |
264 | EFI_PLATFORM_LANG_VARIABLE_NAME,\r | |
265 | {\r | |
266 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
267 | 0,\r | |
268 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
269 | 1,\r | |
270 | MAX_UINTN\r | |
271 | },\r | |
272 | InternalVarCheckAsciiString\r | |
273 | },\r | |
274 | {\r | |
275 | EFI_CON_IN_VARIABLE_NAME,\r | |
276 | {\r | |
277 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
278 | 0,\r | |
279 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
280 | sizeof (EFI_DEVICE_PATH_PROTOCOL),\r | |
281 | MAX_UINTN\r | |
282 | },\r | |
283 | InternalVarCheckDevicePath\r | |
284 | },\r | |
285 | {\r | |
286 | EFI_CON_OUT_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_ERR_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_CON_IN_DEV_VARIABLE_NAME,\r | |
309 | {\r | |
310 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
311 | 0,\r | |
312 | VARIABLE_ATTRIBUTE_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_OUT_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_ERR_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_BOOT_ORDER_VARIABLE_NAME,\r | |
342 | {\r | |
343 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
344 | 0,\r | |
345 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
346 | sizeof (UINT16),\r | |
347 | MAX_UINTN\r | |
348 | },\r | |
349 | InternalVarCheckSizeArray\r | |
350 | },\r | |
351 | {\r | |
352 | EFI_BOOT_NEXT_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 | sizeof (UINT16)\r | |
359 | },\r | |
360 | NULL\r | |
361 | },\r | |
362 | {\r | |
363 | EFI_BOOT_CURRENT_VARIABLE_NAME,\r | |
364 | {\r | |
365 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
366 | 0,\r | |
367 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
368 | sizeof (UINT16),\r | |
369 | sizeof (UINT16)\r | |
370 | },\r | |
371 | NULL\r | |
372 | },\r | |
373 | {\r | |
374 | EFI_BOOT_OPTION_SUPPORT_VARIABLE_NAME,\r | |
375 | {\r | |
376 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
377 | 0,\r | |
378 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
379 | sizeof (UINT32),\r | |
380 | sizeof (UINT32)\r | |
381 | },\r | |
382 | NULL\r | |
383 | },\r | |
384 | {\r | |
385 | EFI_DRIVER_ORDER_VARIABLE_NAME,\r | |
386 | {\r | |
387 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
388 | 0,\r | |
389 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
390 | sizeof (UINT16),\r | |
391 | MAX_UINTN\r | |
392 | },\r | |
393 | InternalVarCheckSizeArray\r | |
394 | },\r | |
395 | {\r | |
396 | EFI_SYS_PREP_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 | \r | |
562 | UEFI_DEFINED_VARIABLE_ENTRY mGlobalVariableList2[] = {\r | |
563 | {\r | |
564 | L"Boot####",\r | |
565 | {\r | |
566 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
567 | 0,\r | |
568 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
569 | sizeof (UINT32) + sizeof (UINT16),\r | |
570 | MAX_UINTN\r | |
571 | },\r | |
572 | InternalVarCheckLoadOption\r | |
573 | },\r | |
574 | {\r | |
575 | L"Driver####",\r | |
576 | {\r | |
577 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
578 | 0,\r | |
579 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
580 | sizeof (UINT32) + sizeof (UINT16),\r | |
581 | MAX_UINTN\r | |
582 | },\r | |
583 | InternalVarCheckLoadOption\r | |
584 | },\r | |
585 | {\r | |
586 | L"SysPrep####",\r | |
587 | {\r | |
588 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
589 | 0,\r | |
590 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
591 | sizeof (UINT32) + sizeof (UINT16),\r | |
592 | MAX_UINTN\r | |
593 | },\r | |
594 | InternalVarCheckLoadOption\r | |
595 | },\r | |
596 | {\r | |
597 | L"Key####",\r | |
598 | {\r | |
599 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
600 | 0,\r | |
601 | VARIABLE_ATTRIBUTE_NV_BS_RT,\r | |
602 | sizeof (EFI_KEY_OPTION),\r | |
603 | sizeof (EFI_KEY_OPTION) + 3 * sizeof (EFI_INPUT_KEY)\r | |
604 | },\r | |
605 | InternalVarCheckKeyOption\r | |
606 | },\r | |
51b655a8 RN |
607 | {\r |
608 | L"PlatformRecovery####",\r | |
609 | {\r | |
610 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
611 | 0,\r | |
612 | VARIABLE_ATTRIBUTE_BS_RT,\r | |
613 | sizeof (UINT32) + sizeof (UINT16),\r | |
614 | MAX_UINTN\r | |
615 | },\r | |
616 | InternalVarCheckLoadOption\r | |
617 | },\r | |
b85488b3 SZ |
618 | };\r |
619 | \r | |
620 | //\r | |
621 | // EFI_IMAGE_SECURITY_DATABASE_GUID\r | |
622 | //\r | |
623 | UEFI_DEFINED_VARIABLE_ENTRY mImageSecurityVariableList[] = {\r | |
624 | {\r | |
625 | EFI_IMAGE_SECURITY_DATABASE,\r | |
626 | {\r | |
627 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
628 | 0,\r | |
629 | VARIABLE_ATTRIBUTE_NV_BS_RT_AT,\r | |
630 | 1,\r | |
631 | MAX_UINTN\r | |
632 | },\r | |
633 | NULL\r | |
634 | },\r | |
635 | {\r | |
636 | EFI_IMAGE_SECURITY_DATABASE1,\r | |
637 | {\r | |
638 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
639 | 0,\r | |
640 | VARIABLE_ATTRIBUTE_NV_BS_RT_AT,\r | |
641 | 1,\r | |
642 | MAX_UINTN\r | |
643 | },\r | |
644 | NULL\r | |
645 | },\r | |
646 | {\r | |
647 | EFI_IMAGE_SECURITY_DATABASE2,\r | |
648 | {\r | |
649 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
650 | 0,\r | |
651 | VARIABLE_ATTRIBUTE_NV_BS_RT_AT,\r | |
652 | 1,\r | |
653 | MAX_UINTN\r | |
654 | },\r | |
655 | NULL\r | |
656 | },\r | |
657 | };\r | |
658 | \r | |
659 | //\r | |
660 | // EFI_HARDWARE_ERROR_VARIABLE\r | |
661 | //\r | |
662 | UEFI_DEFINED_VARIABLE_ENTRY mHwErrRecVariable = {\r | |
663 | L"HwErrRec####",\r | |
664 | {\r | |
665 | VAR_CHECK_VARIABLE_PROPERTY_REVISION,\r | |
666 | 0,\r | |
667 | VARIABLE_ATTRIBUTE_NV_BS_RT_HR,\r | |
668 | 1,\r | |
669 | MAX_UINTN\r | |
670 | },\r | |
671 | NULL\r | |
672 | };\r | |
673 | \r | |
674 | EFI_GUID *mUefiDefinedGuid[] = {\r | |
675 | &gEfiGlobalVariableGuid,\r | |
676 | &gEfiImageSecurityDatabaseGuid,\r | |
677 | &gEfiHardwareErrorVariableGuid\r | |
678 | };\r | |
679 | \r | |
680 | /**\r | |
6c59c7c2 | 681 | Check if a Unicode character is an upper case hexadecimal character.\r |
b85488b3 | 682 | \r |
6c59c7c2 SZ |
683 | This function checks if a Unicode character is an upper case\r |
684 | hexadecimal character. The valid upper case hexadecimal character is\r | |
685 | L'0' to L'9', or L'A' to L'F'.\r | |
b85488b3 SZ |
686 | \r |
687 | \r | |
688 | @param[in] Char The character to check against.\r | |
689 | \r | |
6c59c7c2 SZ |
690 | @retval TRUE If the Char is an upper case hexadecmial character.\r |
691 | @retval FALSE If the Char is not an upper case hexadecmial character.\r | |
b85488b3 SZ |
692 | \r |
693 | **/\r | |
694 | BOOLEAN\r | |
695 | EFIAPI\r | |
696 | VarCheckUefiIsHexaDecimalDigitCharacter (\r | |
697 | IN CHAR16 Char\r | |
698 | )\r | |
699 | {\r | |
6c59c7c2 | 700 | return (BOOLEAN) ((Char >= L'0' && Char <= L'9') || (Char >= L'A' && Char <= L'F'));\r |
b85488b3 SZ |
701 | }\r |
702 | \r | |
703 | /**\r | |
704 | \r | |
705 | This code checks if variable is hardware error record variable or not.\r | |
706 | \r | |
707 | According to UEFI spec, hardware error record variable should use the EFI_HARDWARE_ERROR_VARIABLE VendorGuid\r | |
708 | and have the L"HwErrRec####" name convention, #### is a printed hex value and no 0x or h is included in the hex value.\r | |
709 | \r | |
710 | @param[in] VariableName Pointer to variable name.\r | |
711 | @param[in] VendorGuid Variable Vendor Guid.\r | |
712 | \r | |
713 | @retval TRUE Variable is hardware error record variable.\r | |
714 | @retval FALSE Variable is not hardware error record variable.\r | |
715 | \r | |
716 | **/\r | |
717 | BOOLEAN\r | |
718 | EFIAPI\r | |
719 | IsHwErrRecVariable (\r | |
720 | IN CHAR16 *VariableName,\r | |
721 | IN EFI_GUID *VendorGuid\r | |
722 | )\r | |
723 | {\r | |
724 | if (!CompareGuid (VendorGuid, &gEfiHardwareErrorVariableGuid) ||\r | |
725 | (StrLen (VariableName) != StrLen (L"HwErrRec####")) ||\r | |
726 | (StrnCmp(VariableName, L"HwErrRec", StrLen (L"HwErrRec")) != 0) ||\r | |
727 | !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0x8]) ||\r | |
728 | !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0x9]) ||\r | |
729 | !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0xA]) ||\r | |
730 | !VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[0xB])) {\r | |
731 | return FALSE;\r | |
732 | }\r | |
733 | \r | |
734 | return TRUE;\r | |
735 | }\r | |
736 | \r | |
737 | /**\r | |
738 | Get UEFI defined var check function.\r | |
739 | \r | |
740 | @param[in] VariableName Pointer to variable name.\r | |
741 | @param[in] VendorGuid Pointer to variable vendor GUID.\r | |
742 | @param[out] VariableProperty Pointer to variable property.\r | |
743 | \r | |
744 | @return Internal var check function, NULL if no specific check function.\r | |
745 | \r | |
746 | **/\r | |
747 | INTERNAL_VAR_CHECK_FUNCTION\r | |
748 | GetUefiDefinedVarCheckFunction (\r | |
749 | IN CHAR16 *VariableName,\r | |
750 | IN EFI_GUID *VendorGuid,\r | |
751 | OUT VAR_CHECK_VARIABLE_PROPERTY **VariableProperty\r | |
752 | )\r | |
753 | {\r | |
754 | UINTN Index;\r | |
755 | UINTN NameLength;\r | |
756 | \r | |
757 | if (CompareGuid (VendorGuid, &gEfiGlobalVariableGuid)) {\r | |
758 | //\r | |
759 | // Try list 1, exactly match.\r | |
760 | //\r | |
761 | for (Index = 0; Index < sizeof (mGlobalVariableList)/sizeof (mGlobalVariableList[0]); Index++) {\r | |
762 | if (StrCmp (mGlobalVariableList[Index].Name, VariableName) == 0) {\r | |
763 | *VariableProperty = &(mGlobalVariableList[Index].VariableProperty);\r | |
764 | return mGlobalVariableList[Index].CheckFunction;\r | |
765 | }\r | |
766 | }\r | |
767 | \r | |
768 | //\r | |
769 | // Try list 2.\r | |
770 | //\r | |
771 | NameLength = StrLen (VariableName) - 4;\r | |
772 | for (Index = 0; Index < sizeof (mGlobalVariableList2)/sizeof (mGlobalVariableList2[0]); Index++) {\r | |
773 | if ((StrLen (VariableName) == StrLen (mGlobalVariableList2[Index].Name)) &&\r | |
774 | (StrnCmp (VariableName, mGlobalVariableList2[Index].Name, NameLength) == 0) &&\r | |
775 | VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength]) &&\r | |
776 | VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength + 1]) &&\r | |
777 | VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength + 2]) &&\r | |
778 | VarCheckUefiIsHexaDecimalDigitCharacter (VariableName[NameLength + 3])) {\r | |
779 | *VariableProperty = &(mGlobalVariableList2[Index].VariableProperty);\r | |
780 | return mGlobalVariableList2[Index].CheckFunction;\r | |
781 | }\r | |
782 | }\r | |
783 | }\r | |
784 | \r | |
785 | return NULL;\r | |
786 | }\r | |
787 | \r | |
788 | /**\r | |
789 | SetVariable check handler UEFI defined.\r | |
790 | \r | |
791 | @param[in] VariableName Name of Variable to set.\r | |
792 | @param[in] VendorGuid Variable vendor GUID.\r | |
793 | @param[in] Attributes Attribute value of the variable.\r | |
794 | @param[in] DataSize Size of Data to set.\r | |
795 | @param[in] Data Data pointer.\r | |
796 | \r | |
797 | @retval EFI_SUCCESS The SetVariable check result was success.\r | |
798 | @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits, name, GUID,\r | |
799 | DataSize and Data value was supplied.\r | |
800 | @retval EFI_WRITE_PROTECTED The variable in question is read-only.\r | |
801 | \r | |
802 | **/\r | |
803 | EFI_STATUS\r | |
804 | EFIAPI\r | |
805 | SetVariableCheckHandlerUefiDefined (\r | |
806 | IN CHAR16 *VariableName,\r | |
807 | IN EFI_GUID *VendorGuid,\r | |
808 | IN UINT32 Attributes,\r | |
809 | IN UINTN DataSize,\r | |
810 | IN VOID *Data\r | |
811 | )\r | |
812 | {\r | |
813 | EFI_STATUS Status;\r | |
814 | UINTN Index;\r | |
815 | VAR_CHECK_VARIABLE_PROPERTY Property;\r | |
816 | VAR_CHECK_VARIABLE_PROPERTY *VarCheckProperty;\r | |
817 | INTERNAL_VAR_CHECK_FUNCTION VarCheckFunction;\r | |
818 | \r | |
819 | if ((((Attributes & EFI_VARIABLE_APPEND_WRITE) == 0) && (DataSize == 0)) || (Attributes == 0)) {\r | |
820 | //\r | |
821 | // Do not check delete variable.\r | |
822 | //\r | |
823 | return EFI_SUCCESS;\r | |
824 | }\r | |
825 | \r | |
826 | if ((Attributes & EFI_VARIABLE_HARDWARE_ERROR_RECORD) == EFI_VARIABLE_HARDWARE_ERROR_RECORD) {\r | |
827 | if (!IsHwErrRecVariable (VariableName, VendorGuid)) {\r | |
828 | return EFI_INVALID_PARAMETER;\r | |
829 | }\r | |
830 | }\r | |
831 | \r | |
832 | for (Index = 0; Index < sizeof (mUefiDefinedGuid)/sizeof (mUefiDefinedGuid[0]); Index++) {\r | |
833 | if (CompareGuid (VendorGuid, mUefiDefinedGuid[Index])) {\r | |
834 | if (VarCheckLibVariablePropertyGet (VariableName, VendorGuid, &Property) == EFI_NOT_FOUND) {\r | |
835 | //\r | |
836 | // To prevent name collisions with possible future globally defined variables,\r | |
837 | // other internal firmware data variables that are not defined here must be\r | |
838 | // saved with a unique VendorGuid other than EFI_GLOBAL_VARIABLE or\r | |
839 | // any other GUID defined by the UEFI Specification. Implementations must\r | |
840 | // only permit the creation of variables with a UEFI Specification-defined\r | |
841 | // VendorGuid when these variables are documented in the UEFI Specification.\r | |
842 | //\r | |
843 | DEBUG ((EFI_D_INFO, "UEFI Variable Check fail %r - %s not in %g namespace\n", EFI_INVALID_PARAMETER, VariableName, VendorGuid));\r | |
844 | return EFI_INVALID_PARAMETER;\r | |
845 | }\r | |
846 | }\r | |
847 | }\r | |
848 | \r | |
849 | if (DataSize == 0) {\r | |
850 | return EFI_SUCCESS;\r | |
851 | }\r | |
852 | \r | |
853 | VarCheckProperty = NULL;\r | |
854 | VarCheckFunction = GetUefiDefinedVarCheckFunction (VariableName, VendorGuid, &VarCheckProperty);\r | |
855 | if (VarCheckFunction != NULL) {\r | |
856 | Status = VarCheckFunction (\r | |
857 | VarCheckProperty,\r | |
858 | DataSize,\r | |
859 | Data\r | |
860 | );\r | |
861 | if (EFI_ERROR (Status)) {\r | |
862 | DEBUG ((EFI_D_INFO, "UEFI Variable Check function fail %r - %g:%s\n", Status, VendorGuid, VariableName));\r | |
863 | return Status;\r | |
864 | }\r | |
865 | }\r | |
866 | \r | |
867 | return EFI_SUCCESS;\r | |
868 | }\r | |
869 | \r | |
870 | /**\r | |
871 | Variable property set for UEFI defined variables.\r | |
872 | \r | |
873 | **/\r | |
874 | VOID\r | |
875 | VariablePropertySetUefiDefined (\r | |
876 | VOID\r | |
877 | )\r | |
878 | {\r | |
879 | UINTN Index;\r | |
880 | \r | |
881 | //\r | |
882 | // EFI_GLOBAL_VARIABLE\r | |
883 | //\r | |
884 | for (Index = 0; Index < sizeof (mGlobalVariableList)/sizeof (mGlobalVariableList[0]); Index++) {\r | |
885 | VarCheckLibVariablePropertySet (\r | |
886 | mGlobalVariableList[Index].Name,\r | |
887 | &gEfiGlobalVariableGuid,\r | |
888 | &mGlobalVariableList[Index].VariableProperty\r | |
889 | );\r | |
890 | }\r | |
891 | for (Index = 0; Index < sizeof (mGlobalVariableList2)/sizeof (mGlobalVariableList2[0]); Index++) {\r | |
892 | VarCheckLibVariablePropertySet (\r | |
893 | mGlobalVariableList2[Index].Name,\r | |
894 | &gEfiGlobalVariableGuid,\r | |
895 | &mGlobalVariableList2[Index].VariableProperty\r | |
896 | );\r | |
897 | }\r | |
898 | \r | |
899 | //\r | |
900 | // EFI_IMAGE_SECURITY_DATABASE_GUID\r | |
901 | //\r | |
902 | for (Index = 0; Index < sizeof (mImageSecurityVariableList)/sizeof (mImageSecurityVariableList[0]); Index++) {\r | |
903 | VarCheckLibVariablePropertySet (\r | |
904 | mImageSecurityVariableList[Index].Name,\r | |
905 | &gEfiImageSecurityDatabaseGuid,\r | |
906 | &mImageSecurityVariableList[Index].VariableProperty\r | |
907 | );\r | |
908 | }\r | |
909 | \r | |
910 | //\r | |
911 | // EFI_HARDWARE_ERROR_VARIABLE\r | |
912 | //\r | |
913 | VarCheckLibVariablePropertySet (\r | |
914 | mHwErrRecVariable.Name,\r | |
915 | &gEfiHardwareErrorVariableGuid,\r | |
916 | &mHwErrRecVariable.VariableProperty\r | |
917 | );\r | |
918 | }\r | |
919 | \r | |
920 | /**\r | |
921 | Constructor function of VarCheckUefiLib to set property and\r | |
922 | register SetVariable check handler for UEFI defined variables.\r | |
923 | \r | |
924 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r | |
925 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
926 | \r | |
927 | @retval EFI_SUCCESS The constructor executed correctly.\r | |
928 | \r | |
929 | **/\r | |
930 | EFI_STATUS\r | |
931 | EFIAPI\r | |
932 | VarCheckUefiLibNullClassConstructor (\r | |
933 | IN EFI_HANDLE ImageHandle,\r | |
934 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
935 | )\r | |
936 | {\r | |
937 | VariablePropertySetUefiDefined ();\r | |
938 | VarCheckLibRegisterSetVariableCheckHandler (SetVariableCheckHandlerUefiDefined);\r | |
939 | \r | |
940 | return EFI_SUCCESS;\r | |
941 | }\r |