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1 | /** @file\r |
2 | \r | |
3 | Read and edit the time-base authenticated variables.\r | |
4 | \r | |
5 | Copyright (c) 2011-2019, Intel Corporation. All rights reserved.<BR>\r | |
6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
7 | \r | |
8 | **/\r | |
9 | \r | |
10 | #include "Fce.h"\r | |
11 | #include "TimeBasedVariable.h"\r | |
12 | \r | |
13 | extern LIST_ENTRY mAllVarListEntry;\r | |
14 | extern MULTI_PLATFORM_PARAMETERS mMultiPlatformParam;\r | |
15 | extern G_EFI_FD_INFO gEfiFdInfo;\r | |
16 | \r | |
17 | EFI_GUID gEfiAuthenticatedVariableBasedTimeGuid = EFI_AUTHENTICATED_VARIABLE_BASED_TIME_GUID;\r | |
18 | /**\r | |
19 | \r | |
20 | Gets the pointer to the first variable header in given variable store area.\r | |
21 | \r | |
22 | @param VarStoreHeader Pointer to the Variable Store Header.\r | |
23 | \r | |
24 | @return Pointer to the first variable header.\r | |
25 | \r | |
26 | **/\r | |
27 | static\r | |
28 | VARIABLE_HEADER *\r | |
29 | GetStartPointer (\r | |
30 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
31 | )\r | |
32 | {\r | |
33 | //\r | |
34 | // The end of variable store.\r | |
35 | //\r | |
36 | return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1);\r | |
37 | }\r | |
38 | \r | |
39 | /**\r | |
40 | \r | |
41 | Gets the pointer to the end of the variable storage area.\r | |
42 | \r | |
43 | This function gets pointer to the end of the variable storage\r | |
44 | area, according to the input variable store header.\r | |
45 | \r | |
46 | @param VarStoreHeader Pointer to the Variable Store Header.\r | |
47 | \r | |
48 | @return Pointer to the end of the variable storage area.\r | |
49 | \r | |
50 | **/\r | |
51 | static\r | |
52 | VARIABLE_HEADER *\r | |
53 | GetEndPointer (\r | |
54 | IN VARIABLE_STORE_HEADER *VarStoreHeader\r | |
55 | )\r | |
56 | {\r | |
57 | //\r | |
58 | // The end of variable store\r | |
59 | //\r | |
60 | return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + VarStoreHeader->Size);\r | |
61 | }\r | |
62 | \r | |
63 | \r | |
64 | /**\r | |
65 | \r | |
66 | This code checks if variable header is valid or not.\r | |
67 | \r | |
68 | @param Variable Pointer to the Variable Header.\r | |
69 | \r | |
70 | @retval TRUE Variable header is valid.\r | |
71 | @retval FALSE Variable header is not valid.\r | |
72 | \r | |
73 | **/\r | |
74 | static\r | |
75 | BOOLEAN\r | |
76 | IsValidVariableHeader (\r | |
77 | IN VARIABLE_HEADER *Variable\r | |
78 | )\r | |
79 | {\r | |
80 | if ((Variable == NULL) || (Variable->StartId != VARIABLE_DATA)) {\r | |
81 | return FALSE;\r | |
82 | }\r | |
83 | \r | |
84 | return TRUE;\r | |
85 | }\r | |
86 | \r | |
87 | /**\r | |
88 | \r | |
89 | This code gets the size of name of variable.\r | |
90 | \r | |
91 | @param Variable Pointer to the Variable Header.\r | |
92 | \r | |
93 | @return UINTN Size of variable in bytes.\r | |
94 | \r | |
95 | **/\r | |
96 | static\r | |
97 | UINTN\r | |
98 | NameSizeOfVariable (\r | |
99 | IN VARIABLE_HEADER *Variable\r | |
100 | )\r | |
101 | {\r | |
102 | if ((Variable->State == (UINT8) (-1)) ||\r | |
103 | (Variable->DataSize == (UINT32) (-1)) ||\r | |
104 | (Variable->NameSize == (UINT32) (-1)) ||\r | |
105 | (Variable->Attributes == (UINT32) (-1))\r | |
106 | ) {\r | |
107 | return 0;\r | |
108 | }\r | |
109 | return (UINTN) Variable->NameSize;\r | |
110 | }\r | |
111 | \r | |
112 | /**\r | |
113 | \r | |
114 | This code gets the size of variable data.\r | |
115 | \r | |
116 | @param Variable Pointer to the Variable Header.\r | |
117 | \r | |
118 | @return Size of variable in bytes.\r | |
119 | \r | |
120 | **/\r | |
121 | static\r | |
122 | UINTN\r | |
123 | DataSizeOfVariable (\r | |
124 | IN VARIABLE_HEADER *Variable\r | |
125 | )\r | |
126 | {\r | |
127 | if ((Variable->State == (UINT8) (-1)) ||\r | |
128 | (Variable->DataSize == (UINT32) (-1)) ||\r | |
129 | (Variable->NameSize == (UINT32) (-1)) ||\r | |
130 | (Variable->Attributes == (UINT32) (-1))\r | |
131 | ) {\r | |
132 | return 0;\r | |
133 | }\r | |
134 | return (UINTN) Variable->DataSize;\r | |
135 | }\r | |
136 | \r | |
137 | /**\r | |
138 | \r | |
139 | This code gets the pointer to the variable name.\r | |
140 | \r | |
141 | @param Variable Pointer to the Variable Header.\r | |
142 | \r | |
143 | @return Pointer to Variable Name which is Unicode encoding.\r | |
144 | \r | |
145 | **/\r | |
146 | static\r | |
147 | CHAR16 *\r | |
148 | GetVariableNamePtr (\r | |
149 | IN VARIABLE_HEADER *Variable\r | |
150 | )\r | |
151 | {\r | |
152 | return (CHAR16 *) (Variable + 1);\r | |
153 | }\r | |
154 | \r | |
155 | /**\r | |
156 | \r | |
157 | This code gets the pointer to the variable data.\r | |
158 | \r | |
159 | @param Variable Pointer to the Variable Header.\r | |
160 | \r | |
161 | @return Pointer to Variable Data.\r | |
162 | \r | |
163 | **/\r | |
164 | static\r | |
165 | UINT8 *\r | |
166 | GetVariableDataPtr (\r | |
167 | IN VARIABLE_HEADER *Variable\r | |
168 | )\r | |
169 | {\r | |
170 | UINTN Value;\r | |
171 | \r | |
172 | //\r | |
173 | // Be careful about pad size for alignment.\r | |
174 | //\r | |
175 | Value = (UINTN) GetVariableNamePtr (Variable);\r | |
176 | Value += NameSizeOfVariable (Variable);\r | |
177 | Value += GET_PAD_SIZE (NameSizeOfVariable (Variable));\r | |
178 | \r | |
179 | return (UINT8 *) Value;\r | |
180 | }\r | |
181 | \r | |
182 | /**\r | |
183 | \r | |
184 | This code gets the pointer to the next variable header.\r | |
185 | \r | |
186 | @param Variable Pointer to the Variable Header.\r | |
187 | \r | |
188 | @return Pointer to next variable header.\r | |
189 | \r | |
190 | **/\r | |
191 | static\r | |
192 | VARIABLE_HEADER *\r | |
193 | GetNextVariablePtr (\r | |
194 | IN VARIABLE_HEADER *Variable\r | |
195 | )\r | |
196 | {\r | |
197 | UINTN Value;\r | |
198 | \r | |
199 | if (!IsValidVariableHeader (Variable)) {\r | |
200 | return NULL;\r | |
201 | }\r | |
202 | \r | |
203 | Value = (UINTN) GetVariableDataPtr (Variable);\r | |
204 | Value += DataSizeOfVariable (Variable);\r | |
205 | Value += GET_PAD_SIZE (DataSizeOfVariable (Variable));\r | |
206 | \r | |
207 | //\r | |
208 | // Be careful about pad size for alignment.\r | |
209 | //\r | |
210 | return (VARIABLE_HEADER *) HEADER_ALIGN (Value);\r | |
211 | }\r | |
212 | \r | |
213 | /**\r | |
214 | Search and get a free space in the EFI variable zone\r | |
215 | \r | |
216 | @param VariableStoreHeader The start of a EFI variable zone.\r | |
217 | @param VarListSize The size of a variables needs to be allocated.\r | |
218 | @param FreeBeginVar The dual pointer to the free NV space.\r | |
219 | \r | |
220 | @retval EFI_SUCCESS Return the beginning of a free variable space.\r | |
221 | @retval RETURN_BUFFER_TOO_SMALL Failed.\r | |
222 | **/\r | |
223 | static\r | |
224 | EFI_STATUS\r | |
225 | GetVariableVar (\r | |
226 | IN VARIABLE_STORE_HEADER *VariableStoreHeader,\r | |
227 | IN UINT32 VarListSize,\r | |
228 | IN OUT CHAR8 **FreeBeginVar\r | |
229 | )\r | |
230 | {\r | |
231 | BOOLEAN Flag;\r | |
232 | VARIABLE_HEADER *Variable;\r | |
233 | VARIABLE_HEADER *EndOfVariable;\r | |
234 | CHAR8 *BeginVar;\r | |
235 | \r | |
236 | BeginVar = NULL;\r | |
237 | Flag = FALSE;\r | |
238 | Variable = NULL;\r | |
239 | EndOfVariable = NULL;\r | |
240 | *FreeBeginVar = NULL;\r | |
241 | \r | |
242 | if (VariableStoreHeader == NULL) {\r | |
243 | *FreeBeginVar = NULL;\r | |
244 | return RETURN_INVALID_PARAMETER;\r | |
245 | }\r | |
246 | Variable = GetStartPointer (VariableStoreHeader);\r | |
247 | EndOfVariable = GetEndPointer(VariableStoreHeader);\r | |
248 | //\r | |
249 | //Search the beginning of free NV\r | |
250 | //\r | |
251 | while (Variable != EndOfVariable) {\r | |
252 | BeginVar = (CHAR8 *)Variable;\r | |
253 | Variable = GetNextVariablePtr (Variable);\r | |
254 | if (Variable == NULL) {\r | |
255 | Flag = TRUE;\r | |
256 | break;\r | |
257 | }\r | |
258 | }\r | |
259 | //\r | |
260 | // Check whether the free space is more than what we want\r | |
261 | //\r | |
262 | if ((CHAR8 *)BeginVar + VarListSize > (CHAR8 *)EndOfVariable) {\r | |
263 | return RETURN_BUFFER_TOO_SMALL;\r | |
264 | }\r | |
265 | //\r | |
266 | // If not find the available space, return NULL\r | |
267 | //\r | |
268 | if (!Flag) {\r | |
269 | return RETURN_BUFFER_TOO_SMALL;\r | |
270 | }\r | |
271 | *FreeBeginVar = BeginVar;\r | |
272 | \r | |
273 | return EFI_SUCCESS;\r | |
274 | }\r | |
275 | \r | |
276 | /**\r | |
277 | Search whether the variable in VarList has existed in current NV.\r | |
278 | \r | |
279 | Parse the FFS or Fd image, and find the valid variable pointer.\r | |
280 | \r | |
281 | @param VariableStoreHeader The start of a EFI variable zone.\r | |
282 | @param VarList The pointer to the VarList\r | |
283 | \r | |
284 | @retval address If the variable existed in current NV, return address\r | |
285 | @return NULL Otherwise, return NULL\r | |
286 | **/\r | |
287 | static\r | |
288 | VARIABLE_HEADER *\r | |
289 | FindVariableInNv (\r | |
290 | IN VARIABLE_STORE_HEADER *VariableStoreHeader,\r | |
291 | IN FORMSET_STORAGE *Storage\r | |
292 | )\r | |
293 | {\r | |
294 | BOOLEAN Flag;\r | |
295 | VARIABLE_HEADER *Variable;\r | |
296 | VARIABLE_HEADER *EndOfVariable;\r | |
297 | CHAR16 *VariableName;\r | |
298 | \r | |
299 | Flag = FALSE;\r | |
300 | Variable = NULL;\r | |
301 | EndOfVariable = NULL;\r | |
302 | VariableName = NULL;\r | |
303 | \r | |
304 | if ((VariableStoreHeader == NULL) || (Storage == NULL) || (Storage->Name == NULL)) {\r | |
305 | return NULL;\r | |
306 | }\r | |
307 | Variable = GetStartPointer (VariableStoreHeader);\r | |
308 | EndOfVariable = GetEndPointer(VariableStoreHeader);\r | |
309 | //\r | |
310 | // Parse and compare the variable in the NV space one by one\r | |
311 | //\r | |
312 | while ((Variable != EndOfVariable) && (Variable != NULL)) {\r | |
313 | VariableName = (CHAR16 *)((CHAR8 *)Variable + sizeof (VARIABLE_HEADER));\r | |
314 | if (!CompareGuid (&Variable->VendorGuid, &Storage->Guid) \\r | |
315 | && !FceStrCmp (Storage->Name, VariableName) \\r | |
316 | && (Variable->State == VAR_ADDED)\r | |
317 | ) {\r | |
318 | Flag = TRUE;\r | |
319 | break;\r | |
320 | }\r | |
321 | Variable = GetNextVariablePtr (Variable);\r | |
322 | }\r | |
323 | if (!Flag) {\r | |
324 | return NULL;\r | |
325 | }\r | |
326 | return Variable;\r | |
327 | }\r | |
328 | /**\r | |
329 | Exchange the data between Efi variable and the data of VarList when the\r | |
330 | variable use the time stamp authenticated variable header\r | |
331 | \r | |
332 | If VarToList is TRUE, copy the efi variable data to the VarList; Otherwise,\r | |
333 | update the data from varlist to efi variable.\r | |
334 | \r | |
335 | @param VarToList The flag to control the direction of exchange.\r | |
336 | @param StorageListHead Decide which variale list be updated\r | |
337 | \r | |
338 | @retval EFI_SUCCESS Get the address successfully.\r | |
339 | @retval EFI_OUT_OF_RESOURCES No available in the EFI variable zone.\r | |
340 | @retval EFI_INVALID_PARAMETER Invalid variable name.\r | |
341 | **/\r | |
342 | \r | |
343 | EFI_STATUS\r | |
344 | SynAuthEfiVariableBasedTime (\r | |
345 | IN BOOLEAN VarToList,\r | |
346 | IN LIST_ENTRY *StorageListHead\r | |
347 | )\r | |
348 | {\r | |
349 | EFI_FIRMWARE_VOLUME_HEADER *VarAddr;\r | |
350 | LIST_ENTRY *StorageLink;\r | |
351 | FORMSET_STORAGE *Storage;\r | |
352 | EFI_STATUS Status;\r | |
353 | CHAR8 *NewAvailableAddr;\r | |
354 | CHAR8 *DataBase;\r | |
355 | VARIABLE_HEADER *VariableHeader;\r | |
356 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
357 | UINTN VarNameSize;\r | |
358 | \r | |
359 | Status = EFI_SUCCESS;\r | |
360 | DataBase = NULL;\r | |
361 | NewAvailableAddr = NULL;\r | |
362 | VarNameSize = 0;\r | |
363 | VariableHeader = NULL;\r | |
364 | VarAddr = (EFI_FIRMWARE_VOLUME_HEADER *) gEfiFdInfo.EfiVariableAddr;\r | |
365 | VariableStoreHeader = (VARIABLE_STORE_HEADER *)((CHAR8 *)VarAddr + VarAddr->HeaderLength);\r | |
366 | //\r | |
367 | //Parse the variable range, and check whether there is some existed ones.\r | |
368 | //\r | |
369 | StorageLink = GetFirstNode (StorageListHead);\r | |
370 | while (!IsNull (StorageListHead, StorageLink)) {\r | |
371 | Storage = FORMSET_STORAGE_FROM_LINK (StorageLink);\r | |
372 | //\r | |
373 | // Ignore the invalid varlist node\r | |
374 | //\r | |
375 | if (Storage->Buffer == NULL) {\r | |
376 | StorageLink = GetNextNode (StorageListHead, StorageLink);\r | |
377 | continue;\r | |
378 | }\r | |
379 | //\r | |
380 | // Report error, if the variable name is invalid.\r | |
381 | //\r | |
382 | if ((Storage->Name == NULL) || (FceStrLen(Storage->Name) == 0)) {\r | |
383 | printf ("Error. One variable name is NULL. Its GUID is: ");\r | |
384 | PrintGuid(&(Storage->Guid));\r | |
385 | return EFI_INVALID_PARAMETER;\r | |
386 | }\r | |
387 | VariableHeader = FindVariableInNv (\r | |
388 | VariableStoreHeader,\r | |
389 | Storage\r | |
390 | );\r | |
391 | \r | |
392 | if (VarToList) {\r | |
393 | //\r | |
394 | //Copy the data from NV to the VarList.\r | |
395 | //\r | |
396 | if (VariableHeader != NULL) {\r | |
397 | if (Storage->Buffer == NULL) {\r | |
398 | Storage->Buffer = calloc (Storage->Size, sizeof (CHAR8));\r | |
399 | ASSERT (Storage->Buffer != NULL);\r | |
400 | }\r | |
401 | //\r | |
402 | // The variable in VarList is CHAR8, but in the EFI variable is CHAR16.\r | |
403 | //\r | |
404 | DataBase = (CHAR8 *)GetVariableDataPtr (VariableHeader);\r | |
405 | memcpy (\r | |
406 | Storage->Buffer,\r | |
407 | (VOID *) DataBase,\r | |
408 | Storage->Size\r | |
409 | );\r | |
410 | }\r | |
411 | } else {\r | |
412 | //\r | |
413 | //If existed, copy the List data to the variable in NV directly. If not found, create a new one.\r | |
414 | //\r | |
415 | VarNameSize = 2 * (FceStrLen (Storage->Name) + 1);\r | |
416 | //\r | |
417 | //If this variable has existed in current FD, the data in VarList has\r | |
418 | // been updated, and this variable is not authenticated type, then\r | |
419 | // update it from VarList to the FD.\r | |
420 | //\r | |
421 | if ((VariableHeader != NULL) \\r | |
422 | && (Storage->Buffer != NULL)\r | |
423 | ) {\r | |
424 | if (!(VariableHeader->Attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS)) {\r | |
425 | DataBase = (CHAR8 *)GetVariableDataPtr (VariableHeader);\r | |
426 | memcpy (\r | |
427 | (VOID *) DataBase,\r | |
428 | Storage->Buffer,\r | |
429 | Storage->Size\r | |
430 | );\r | |
431 | } else {\r | |
432 | printf ("Error. Not support to update authenticated variables.\n");\r | |
433 | return EFI_INVALID_PARAMETER;\r | |
434 | }\r | |
435 | } else if ((VariableHeader == NULL) && (Storage->Buffer != NULL)){\r | |
436 | //\r | |
437 | //If EfiVarstore is not EFI_VARIABLE_NON_VOLATILE, only skip it.\r | |
438 | //\r | |
439 | if (Storage->NewEfiVarstore\r | |
440 | && ((Storage->Attributes & EFI_VARIABLE_NON_VOLATILE) == 0)\r | |
441 | ) {\r | |
442 | StorageLink = GetNextNode (StorageListHead, StorageLink);\r | |
443 | continue;\r | |
444 | }\r | |
445 | //\r | |
446 | // Try to get the available zone from the efi variables\r | |
447 | //\r | |
448 | Status = GetVariableVar (\r | |
449 | VariableStoreHeader,\r | |
450 | Storage->Size + sizeof (VARIABLE_HEADER),\r | |
451 | &NewAvailableAddr\r | |
452 | );\r | |
453 | \r | |
454 | if (!EFI_ERROR (Status)) {\r | |
455 | //\r | |
456 | // Create the authenticated variable header\r | |
457 | //\r | |
458 | VariableHeader = (VARIABLE_HEADER *) NewAvailableAddr;\r | |
459 | VariableHeader->StartId = VARIABLE_DATA;\r | |
460 | VariableHeader->State = VAR_ADDED;\r | |
461 | VariableHeader->Reserved = 0x0;\r | |
462 | VariableHeader->MonotonicCount = 0x0;\r | |
463 | memset (&(VariableHeader->TimeStamp), 0, sizeof (EFI_TIME));\r | |
464 | VariableHeader->PubKeyIndex = 0x0;\r | |
465 | if (Storage->NewEfiVarstore) {\r | |
466 | VariableHeader->Attributes = Storage->Attributes;\r | |
467 | } else {\r | |
468 | VariableHeader->Attributes = EFI_VARIABLE_NON_VOLATILE|EFI_VARIABLE_BOOTSERVICE_ACCESS|EFI_VARIABLE_RUNTIME_ACCESS;\r | |
469 | }\r | |
470 | VariableHeader->NameSize = VarNameSize;\r | |
471 | VariableHeader->DataSize = Storage->Size;\r | |
472 | //\r | |
473 | //Copy the Guid, variable name, and data in sequence.\r | |
474 | //\r | |
475 | memcpy (\r | |
476 | (VOID *)&(VariableHeader->VendorGuid),\r | |
477 | &(Storage->Guid),\r | |
478 | sizeof (EFI_GUID)\r | |
479 | );\r | |
480 | NewAvailableAddr = NewAvailableAddr + sizeof (VARIABLE_HEADER);\r | |
481 | memcpy (\r | |
482 | (VOID *) NewAvailableAddr,\r | |
483 | Storage->Name,\r | |
484 | VarNameSize\r | |
485 | );\r | |
486 | \r | |
487 | NewAvailableAddr = NewAvailableAddr + VarNameSize + GET_PAD_SIZE (VarNameSize);\r | |
488 | memcpy (\r | |
489 | (VOID *) NewAvailableAddr,\r | |
490 | Storage->Buffer,\r | |
491 | Storage->Size * sizeof (CHAR8)\r | |
492 | );\r | |
493 | } else {\r | |
494 | printf ("Error. No available space in NV ram.\n");\r | |
495 | return EFI_OUT_OF_RESOURCES;\r | |
496 | }\r | |
497 | }\r | |
498 | }\r | |
499 | StorageLink = GetNextNode (StorageListHead, StorageLink);\r | |
500 | }\r | |
501 | return Status;\r | |
502 | }\r | |
503 | \r | |
504 | /**\r | |
505 | Remove the variable from Efi variable\r | |
506 | \r | |
507 | Found the variable with the same name in StorageListHead and remove it.\r | |
508 | \r | |
509 | @param StorageListHead Decide which variale list be removed.\r | |
510 | \r | |
511 | @retval EFI_SUCCESS Remove the variables successfully.\r | |
512 | **/\r | |
513 | EFI_STATUS\r | |
514 | RemoveAuthEfiVariableBasedTime (\r | |
515 | IN LIST_ENTRY *StorageListHead\r | |
516 | )\r | |
517 | {\r | |
518 | EFI_FIRMWARE_VOLUME_HEADER *VarAddr;\r | |
519 | LIST_ENTRY *StorageLink;\r | |
520 | FORMSET_STORAGE *Storage;\r | |
521 | VARIABLE_HEADER *VariableHeader;\r | |
522 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
523 | \r | |
524 | VariableHeader = NULL;\r | |
525 | VarAddr = (EFI_FIRMWARE_VOLUME_HEADER *) gEfiFdInfo.EfiVariableAddr;\r | |
526 | VariableStoreHeader = (VARIABLE_STORE_HEADER *)((CHAR8 *)VarAddr + VarAddr->HeaderLength);\r | |
527 | //\r | |
528 | //Parse the variable range, and check whether there is some existed ones.\r | |
529 | //\r | |
530 | StorageLink = GetFirstNode (StorageListHead);\r | |
531 | while (!IsNull (StorageListHead, StorageLink)) {\r | |
532 | Storage = FORMSET_STORAGE_FROM_LINK (StorageLink);\r | |
533 | //\r | |
534 | // Ignore the invalid varlist node\r | |
535 | //\r | |
536 | if (Storage->Buffer == NULL) {\r | |
537 | StorageLink = GetNextNode (StorageListHead, StorageLink);\r | |
538 | continue;\r | |
539 | }\r | |
540 | //\r | |
541 | // Report error, if the variable name is invalid.\r | |
542 | //\r | |
543 | if ((Storage->Name == NULL) || (FceStrLen(Storage->Name) == 0)) {\r | |
544 | printf ("Error. One variable name is NULL. Its GUID is: ");\r | |
545 | PrintGuid(&(Storage->Guid));\r | |
546 | return EFI_INVALID_PARAMETER;\r | |
547 | }\r | |
548 | VariableHeader = FindVariableInNv (\r | |
549 | VariableStoreHeader,\r | |
550 | Storage\r | |
551 | );\r | |
552 | if (VariableHeader != NULL) {\r | |
553 | VariableHeader->State = VAR_DELETED;\r | |
554 | }\r | |
555 | StorageLink = GetNextNode (StorageListHead, StorageLink);\r | |
556 | }\r | |
557 | return EFI_SUCCESS;\r | |
558 | }\r | |
559 | \r | |
560 | /**\r | |
561 | Check the store variable is Time stamp authenticated or not\r | |
562 | \r | |
563 | @param VarToList The pointer to the header of Variable Store.\r | |
564 | \r | |
565 | @retval TRUE If authenticated, return TRUE.\r | |
566 | @retval FALSE Otherwise, return FALSE.\r | |
567 | **/\r | |
568 | \r | |
569 | BOOLEAN\r | |
570 | CheckTimeBasedVarStoreOrNot (\r | |
571 | IN VOID *VariableStoreHeader\r | |
572 | )\r | |
573 | {\r | |
574 | if (!CompareGuid (\r | |
575 | &gEfiAuthenticatedVariableBasedTimeGuid,\r | |
576 | &((VARIABLE_STORE_HEADER *)VariableStoreHeader)->Signature)\r | |
577 | ) {\r | |
578 | return TRUE;\r | |
579 | } else {\r | |
580 | return FALSE;\r | |
581 | }\r | |
582 | }\r | |
583 | \r | |
584 | /**\r | |
585 | Copy time-based authenticated variable to binary in multi-platform mode\r | |
586 | \r | |
587 | @param Storage The pointer to a storage in storage list.\r | |
588 | @param StorageBeginning The pointer to the beginning of storage under specifed platformId and defaultId\r | |
589 | @param Index The number of the storage. If the Index is 0, record the variable header to\r | |
590 | the binary. Or else, only record the storage.\r | |
591 | \r | |
592 | @return length The length of storage\r | |
593 | **/\r | |
594 | UINT32\r | |
595 | CopyTimeBasedVariableToBinary (\r | |
596 | IN FORMSET_STORAGE *Storage,\r | |
597 | IN OUT UINT8 *StorageBeginning,\r | |
598 | IN UINT32 Index\r | |
599 | )\r | |
600 | {\r | |
601 | EFI_STATUS Status;\r | |
602 | CHAR8 *NewAvailableAddr;\r | |
603 | VARIABLE_HEADER *VariableHeader;\r | |
604 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
605 | UINTN VarNameSize;\r | |
606 | UINT32 HeaderLength;\r | |
607 | \r | |
608 | Status = EFI_SUCCESS;\r | |
609 | NewAvailableAddr = NULL;\r | |
610 | VarNameSize = 0;\r | |
611 | HeaderLength = 0;\r | |
612 | VariableHeader = NULL;\r | |
613 | VariableStoreHeader = NULL;\r | |
614 | \r | |
615 | if ((Storage->Name == NULL) || (FceStrLen(Storage->Name) == 0)) {\r | |
616 | printf ("Error. One variable name is NULL. Its GUID is: ");\r | |
617 | PrintGuid(&(Storage->Guid));\r | |
618 | return 0;\r | |
619 | }\r | |
620 | //\r | |
621 | // If the first storage under one specified platformId and defaultId, create the variable header\r | |
622 | //\r | |
623 | if (Index == 0) {\r | |
624 | HeaderLength = WriteDefaultAndPlatformId (StorageBeginning, Storage);\r | |
625 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) (StorageBeginning + HeaderLength);\r | |
626 | //\r | |
627 | //Create the Variable Storage header\r | |
628 | //\r | |
629 | memcpy (&(VariableStoreHeader->Signature), &gEfiAuthenticatedVariableBasedTimeGuid, sizeof (EFI_GUID));\r | |
630 | VariableStoreHeader->Format = 0x5A;\r | |
631 | VariableStoreHeader->State = 0xFE;\r | |
632 | //\r | |
633 | //Assign a big size here. It will be fixed after the storage under a specifed platformId and defaultId are all written.\r | |
634 | //\r | |
635 | VariableStoreHeader->Size = gEfiFdInfo.FdSize;\r | |
636 | }\r | |
637 | \r | |
638 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) (StorageBeginning + *(UINT16 *)StorageBeginning);\r | |
639 | \r | |
640 | Status = GetVariableVar (\r | |
641 | VariableStoreHeader,\r | |
642 | Storage->Size + sizeof (VARIABLE_HEADER),\r | |
643 | &NewAvailableAddr\r | |
644 | );\r | |
645 | \r | |
646 | if (EFI_ERROR (Status)) {\r | |
647 | return FAIL;\r | |
648 | }\r | |
649 | //\r | |
650 | // Create the variable header\r | |
651 | //\r | |
652 | VarNameSize = 2 * (FceStrLen (Storage->Name) + 1);\r | |
653 | VariableHeader = (VARIABLE_HEADER *) NewAvailableAddr;\r | |
654 | VariableHeader->StartId = VARIABLE_DATA;\r | |
655 | VariableHeader->State = VAR_ADDED;\r | |
656 | VariableHeader->Reserved = 0x0;\r | |
657 | VariableHeader->MonotonicCount = 0x0;\r | |
658 | memset (&(VariableHeader->TimeStamp), 0, sizeof (EFI_TIME));\r | |
659 | VariableHeader->PubKeyIndex = 0x0;\r | |
660 | \r | |
661 | if (Storage->NewEfiVarstore) {\r | |
662 | VariableHeader->Attributes = Storage->Attributes;\r | |
663 | } else {\r | |
664 | VariableHeader->Attributes = EFI_VARIABLE_NON_VOLATILE|EFI_VARIABLE_BOOTSERVICE_ACCESS|EFI_VARIABLE_RUNTIME_ACCESS;\r | |
665 | }\r | |
666 | VariableHeader->NameSize = VarNameSize;\r | |
667 | VariableHeader->DataSize = Storage->Size;\r | |
668 | //\r | |
669 | //Copy the Guid, variable name, and data in sequence.\r | |
670 | //\r | |
671 | memcpy (\r | |
672 | (VOID *)&(VariableHeader->VendorGuid),\r | |
673 | &(Storage->Guid),\r | |
674 | sizeof (EFI_GUID)\r | |
675 | );\r | |
676 | NewAvailableAddr = NewAvailableAddr + sizeof (VARIABLE_HEADER);\r | |
677 | memcpy (\r | |
678 | (VOID *) NewAvailableAddr,\r | |
679 | Storage->Name,\r | |
680 | VarNameSize\r | |
681 | );\r | |
682 | \r | |
683 | NewAvailableAddr = NewAvailableAddr + VarNameSize + GET_PAD_SIZE (VarNameSize);\r | |
684 | memcpy (\r | |
685 | (VOID *) NewAvailableAddr,\r | |
686 | Storage->Buffer,\r | |
687 | Storage->Size * sizeof (CHAR8)\r | |
688 | );\r | |
689 | //\r | |
690 | // Return the length which is from the beginning of Binary\r | |
691 | //\r | |
692 | return ((UINT32) ((UINT8*)NewAvailableAddr - StorageBeginning) + Storage->Size);\r | |
693 | }\r | |
694 | \r | |
695 | /**\r | |
696 | Read time-based authenticated variable to storage list in multi-platform mode\r | |
697 | \r | |
698 | @param Binary The pointer to the header of storage under specifed platformId and defaultId\r | |
699 | @param StorageListEntry The pointer to the storage list.\r | |
700 | \r | |
701 | @return length The length of storage\r | |
702 | **/\r | |
703 | UINT32\r | |
704 | ReadTimeBasedVariableToList (\r | |
705 | IN UINT8 *Binary,\r | |
706 | IN LIST_ENTRY *StorageListEntry\r | |
707 | )\r | |
708 | {\r | |
709 | VARIABLE_HEADER *EndOfVariable;\r | |
710 | VARIABLE_HEADER *Variable;\r | |
711 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
712 | FORMSET_STORAGE *Storage;\r | |
713 | BOOLEAN ReadIdHeaderFlag;\r | |
714 | UINT32 Length;\r | |
715 | EFI_COMMON_SECTION_HEADER *SectionHeader;\r | |
716 | UINT8 *DataBase;\r | |
717 | static UINT16 PreDefaultId[MAX_PLATFORM_DEFAULT_ID_NUM];\r | |
718 | static UINT64 PrePlatformId[MAX_PLATFORM_DEFAULT_ID_NUM];\r | |
719 | \r | |
720 | VariableStoreHeader = NULL;\r | |
721 | Variable = NULL;\r | |
722 | ReadIdHeaderFlag = TRUE;\r | |
723 | Length = 0;\r | |
724 | SectionHeader = (EFI_COMMON_SECTION_HEADER *)Binary;\r | |
725 | DataBase = Binary + sizeof (EFI_COMMON_SECTION_HEADER);\r | |
726 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) (DataBase + *(UINT16 *)DataBase);\r | |
727 | EndOfVariable = GetEndPointer(VariableStoreHeader);\r | |
728 | \r | |
729 | for (Variable = GetStartPointer (VariableStoreHeader);\r | |
730 | Length < VariableStoreHeader->Size;\r | |
731 | Length += sizeof (VARIABLE_HEADER) + Variable->NameSize + Variable->DataSize\r | |
732 | ) {\r | |
733 | //\r | |
734 | // Create the storage\r | |
735 | //\r | |
736 | Storage = NULL;\r | |
737 | Storage = calloc (sizeof (FORMSET_STORAGE), sizeof (CHAR8));\r | |
738 | if (Storage == NULL) {\r | |
739 | printf ("Allocate memory failed.\n");\r | |
740 | return FAIL;\r | |
741 | }\r | |
742 | //\r | |
743 | // If access the first storage, read the platformId and defaultId\r | |
744 | //\r | |
745 | if (ReadIdHeaderFlag) {\r | |
746 | ReadDefaultAndPlatformIdFromBfv (DataBase, Storage);\r | |
747 | Length += sizeof (VARIABLE_HEADER) + Variable->NameSize + Variable->DataSize;\r | |
748 | ReadIdHeaderFlag = FALSE;\r | |
749 | memcpy (PreDefaultId, Storage->DefaultId, MAX_PLATFORM_DEFAULT_ID_NUM * sizeof (UINT16));\r | |
750 | memcpy (PrePlatformId, Storage->PlatformId, MAX_PLATFORM_DEFAULT_ID_NUM * sizeof (UINT64));\r | |
751 | } else {\r | |
752 | //\r | |
753 | // Store the DefaultId and PlatformId collected from the header to Storage.\r | |
754 | //\r | |
755 | memcpy (Storage->DefaultId, PreDefaultId, MAX_PLATFORM_DEFAULT_ID_NUM * sizeof (UINT16));\r | |
756 | memcpy (Storage->PlatformId, PrePlatformId, MAX_PLATFORM_DEFAULT_ID_NUM * sizeof (UINT64));\r | |
757 | }\r | |
758 | Storage->Attributes = Variable->Attributes;\r | |
759 | Storage->Size = (UINT16)Variable->DataSize;\r | |
760 | Storage->Name = calloc (Variable->NameSize, sizeof (UINT8));\r | |
761 | ASSERT (Storage->Name != NULL);\r | |
762 | Storage->Buffer = calloc (Variable->DataSize, sizeof (UINT8));\r | |
763 | ASSERT (Storage->Buffer != NULL);\r | |
764 | memcpy (\r | |
765 | &(Storage->Guid),\r | |
766 | &(Variable->VendorGuid),\r | |
767 | sizeof (EFI_GUID)\r | |
768 | );\r | |
769 | memcpy (\r | |
770 | Storage->Name,\r | |
771 | (UINT8 *)Variable + sizeof (VARIABLE_HEADER),\r | |
772 | Variable->NameSize\r | |
773 | );\r | |
774 | memcpy (\r | |
775 | Storage->Buffer,\r | |
776 | (UINT8 *)Variable + sizeof (VARIABLE_HEADER) + Variable->NameSize + GET_PAD_SIZE (Variable->NameSize),\r | |
777 | Storage->Size * sizeof (CHAR8)\r | |
778 | );\r | |
779 | //\r | |
780 | // Assigned the value for comparison in verify mode\r | |
781 | //\r | |
782 | Storage->Type = EFI_IFR_VARSTORE_EFI_OP;\r | |
783 | Storage->NewEfiVarstore = TRUE;\r | |
784 | InitializeListHead (&Storage->NameValueListHead);\r | |
785 | \r | |
786 | InsertTailList(StorageListEntry, &Storage->Link);\r | |
787 | //\r | |
788 | // If the last variable, exit.\r | |
789 | //\r | |
790 | if (Variable == EndOfVariable) {\r | |
791 | break;\r | |
792 | }\r | |
793 | \r | |
794 | Variable = GetNextVariablePtr (Variable);\r | |
795 | assert (Variable != NULL);\r | |
796 | }\r | |
797 | //\r | |
798 | // Return the length which is from the beginning of Binary\r | |
799 | //\r | |
800 | Length = FvBufExpand3ByteSize (SectionHeader->Size);\r | |
801 | \r | |
802 | return Length;\r | |
803 | }\r | |
804 | \r | |
805 | /**\r | |
806 | Check whether exists the valid time-based variables in NvStorage or not.\r | |
807 | \r | |
808 | @retval TRUE If existed, return TRUE.\r | |
809 | @retval FALSE Others\r | |
810 | **/\r | |
811 | BOOLEAN\r | |
812 | ExistTimeBasedEfiVarOrNot (\r | |
813 | IN LIST_ENTRY *StorageListHead\r | |
814 | )\r | |
815 | {\r | |
816 | EFI_FIRMWARE_VOLUME_HEADER *VarAddr;\r | |
817 | LIST_ENTRY *StorageLink;\r | |
818 | FORMSET_STORAGE *Storage;\r | |
819 | VARIABLE_HEADER *VariableHeader;\r | |
820 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
821 | \r | |
822 | VariableHeader = NULL;\r | |
823 | VarAddr = (EFI_FIRMWARE_VOLUME_HEADER *) gEfiFdInfo.EfiVariableAddr;\r | |
824 | VariableStoreHeader = (VARIABLE_STORE_HEADER *)((CHAR8 *)VarAddr + VarAddr->HeaderLength);\r | |
825 | //\r | |
826 | //Parse the variable range, and check whether there is some existed ones.\r | |
827 | //\r | |
828 | StorageLink = GetFirstNode (StorageListHead);\r | |
829 | while (!IsNull (StorageListHead, StorageLink)) {\r | |
830 | Storage = FORMSET_STORAGE_FROM_LINK (StorageLink);\r | |
831 | //\r | |
832 | // Ignore the invalid varlist node\r | |
833 | //\r | |
834 | if ((Storage->Buffer == NULL)\r | |
835 | || (Storage->Name == NULL)\r | |
836 | || (FceStrLen(Storage->Name) == 0)\r | |
837 | ) {\r | |
838 | StorageLink = GetNextNode (StorageListHead, StorageLink);\r | |
839 | continue;\r | |
840 | }\r | |
841 | //\r | |
842 | // Report error, if the variable name is invalid.\r | |
843 | //\r | |
844 | if ((Storage->Name == NULL) || (FceStrLen(Storage->Name) == 0)) {\r | |
845 | StorageLink = GetNextNode (StorageListHead, StorageLink);\r | |
846 | continue;\r | |
847 | }\r | |
848 | VariableHeader = FindVariableInNv (\r | |
849 | VariableStoreHeader,\r | |
850 | Storage\r | |
851 | );\r | |
852 | \r | |
853 | if ((VariableHeader != NULL)) {\r | |
854 | return TRUE;\r | |
855 | }\r | |
856 | StorageLink = GetNextNode (StorageListHead, StorageLink);\r | |
857 | }\r | |
858 | return FALSE;\r | |
859 | }\r | |
860 | \r | |
861 | /**\r | |
862 | Fix the size of time-based variable header.\r | |
863 | \r | |
864 | @param Binary The pointer to the header of storage under specifed platformId and defaultId\r | |
865 | @param Length The length of binary.\r | |
866 | \r | |
867 | **/\r | |
868 | VOID\r | |
869 | FixBasedTimeVariableHeaderSize (\r | |
870 | IN UINT8 *BinaryBeginning,\r | |
871 | IN UINT32 Length\r | |
872 | )\r | |
873 | {\r | |
874 | VARIABLE_STORE_HEADER *VariableStoreHeader;\r | |
875 | \r | |
876 | VariableStoreHeader = (VARIABLE_STORE_HEADER *) (BinaryBeginning + *(UINT16 *)BinaryBeginning);\r | |
877 | VariableStoreHeader->Size = Length - *(UINT16 *)BinaryBeginning;\r | |
878 | }\r |