summaryrefslogtreecommitdiff
path: root/MdeModulePkg/Library/SmmLockBoxLib/SmmLockBoxDxeLib.c
blob: 9659f014e937c86afe27f42978362f6a497152ad (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
/** @file

Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>

This program and the accompanying materials
are licensed and made available under the terms and conditions
of the BSD License which accompanies this distribution.  The
full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include <PiDxe.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/LockBoxLib.h>
#include <Library/DebugLib.h>
#include <Protocol/SmmCommunication.h>
#include <Guid/SmmLockBox.h>

#include "SmmLockBoxLibPrivate.h"

/**
  This function will save confidential information to lockbox.

  @param Guid       the guid to identify the confidential information
  @param Buffer     the address of the confidential information
  @param Length     the length of the confidential information

  @retval RETURN_SUCCESS            the information is saved successfully.
  @retval RETURN_INVALID_PARAMETER  the Guid is NULL, or Buffer is NULL, or Length is 0
  @retval RETURN_ALREADY_STARTED    the requested GUID already exist.
  @retval RETURN_OUT_OF_RESOURCES   no enough resource to save the information.
  @retval RETURN_ACCESS_DENIED      it is too late to invoke this interface
  @retval RETURN_NOT_STARTED        it is too early to invoke this interface
  @retval RETURN_UNSUPPORTED        the service is not supported by implementaion.
**/
RETURN_STATUS
EFIAPI
SaveLockBox (
  IN  GUID                        *Guid,
  IN  VOID                        *Buffer,
  IN  UINTN                       Length
  )
{
  EFI_STATUS                      Status;
  EFI_SMM_COMMUNICATION_PROTOCOL  *SmmCommunication;
  EFI_SMM_LOCK_BOX_PARAMETER_SAVE *LockBoxParameterSave;
  EFI_SMM_COMMUNICATE_HEADER      *CommHeader;
  UINT8                           CommBuffer[sizeof(EFI_GUID) + sizeof(UINTN) + sizeof(EFI_SMM_LOCK_BOX_PARAMETER_SAVE)];
  UINTN                           CommSize;

  DEBUG ((EFI_D_INFO, "SmmLockBoxDxeLib SaveLockBox - Enter\n"));

  //
  // Basic check
  //
  if ((Guid == NULL) || (Buffer == NULL) || (Length == 0)) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // Get needed resource
  //
  Status = gBS->LocateProtocol (
                  &gEfiSmmCommunicationProtocolGuid,
                  NULL,
                  (VOID **)&SmmCommunication
                  );
  if (EFI_ERROR (Status)) {
    return EFI_NOT_STARTED;
  }

  //
  // Prepare parameter
  //
  CommHeader = (EFI_SMM_COMMUNICATE_HEADER *)&CommBuffer[0];
  CopyMem (&CommHeader->HeaderGuid, &gEfiSmmLockBoxCommunicationGuid, sizeof(gEfiSmmLockBoxCommunicationGuid));
  CommHeader->MessageLength = sizeof(*LockBoxParameterSave);

  LockBoxParameterSave = (EFI_SMM_LOCK_BOX_PARAMETER_SAVE *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data)];
  LockBoxParameterSave->Header.Command    = EFI_SMM_LOCK_BOX_COMMAND_SAVE;
  LockBoxParameterSave->Header.DataLength = sizeof(*LockBoxParameterSave);
  LockBoxParameterSave->Header.ReturnStatus = (UINT64)-1;
  CopyMem (&LockBoxParameterSave->Guid, Guid, sizeof(*Guid));
  LockBoxParameterSave->Buffer     = (EFI_PHYSICAL_ADDRESS)(UINTN)Buffer;
  LockBoxParameterSave->Length     = (UINT64)Length;

  //
  // Send command
  //
  CommSize = sizeof(CommBuffer);
  Status = SmmCommunication->Communicate (
                               SmmCommunication,
                               &CommBuffer[0],
                               &CommSize
                               );
  ASSERT_EFI_ERROR (Status);

  Status = (EFI_STATUS)LockBoxParameterSave->Header.ReturnStatus;

  DEBUG ((EFI_D_INFO, "SmmLockBoxDxeLib SaveLockBox - Exit (%r)\n", Status));

  //
  // Done
  //
  return Status;
}

/**
  This function will set lockbox attributes.

  @param Guid       the guid to identify the confidential information
  @param Attributes the attributes of the lockbox

  @retval RETURN_SUCCESS            the information is saved successfully.
  @retval RETURN_INVALID_PARAMETER  attributes is invalid.
  @retval RETURN_NOT_FOUND          the requested GUID not found.
  @retval RETURN_ACCESS_DENIED      it is too late to invoke this interface
  @retval RETURN_NOT_STARTED        it is too early to invoke this interface
  @retval RETURN_UNSUPPORTED        the service is not supported by implementaion.
**/
RETURN_STATUS
EFIAPI
SetLockBoxAttributes (
  IN  GUID                        *Guid,
  IN  UINT64                      Attributes
  )
{
  EFI_STATUS                                Status;
  EFI_SMM_COMMUNICATION_PROTOCOL            *SmmCommunication;
  EFI_SMM_LOCK_BOX_PARAMETER_SET_ATTRIBUTES *LockBoxParameterSetAttributes;
  EFI_SMM_COMMUNICATE_HEADER                *CommHeader;
  UINT8                                     CommBuffer[sizeof(EFI_GUID) + sizeof(UINTN) + sizeof(EFI_SMM_LOCK_BOX_PARAMETER_SET_ATTRIBUTES)];
  UINTN                                     CommSize;

  DEBUG ((EFI_D_INFO, "SmmLockBoxDxeLib SetLockBoxAttributes - Enter\n"));

  //
  // Basic check
  //
  if ((Guid == NULL) ||
      ((Attributes & ~LOCK_BOX_ATTRIBUTE_RESTORE_IN_PLACE) != 0)) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // Get needed resource
  //
  Status = gBS->LocateProtocol (
                  &gEfiSmmCommunicationProtocolGuid,
                  NULL,
                  (VOID **)&SmmCommunication
                  );
  if (EFI_ERROR (Status)) {
    return EFI_NOT_STARTED;
  }

  //
  // Prepare parameter
  //
  CommHeader = (EFI_SMM_COMMUNICATE_HEADER *)&CommBuffer[0];
  CopyMem (&CommHeader->HeaderGuid, &gEfiSmmLockBoxCommunicationGuid, sizeof(gEfiSmmLockBoxCommunicationGuid));
  CommHeader->MessageLength = sizeof(*LockBoxParameterSetAttributes);

  LockBoxParameterSetAttributes = (EFI_SMM_LOCK_BOX_PARAMETER_SET_ATTRIBUTES *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data)];
  LockBoxParameterSetAttributes->Header.Command    = EFI_SMM_LOCK_BOX_COMMAND_SET_ATTRIBUTES;
  LockBoxParameterSetAttributes->Header.DataLength = sizeof(*LockBoxParameterSetAttributes);
  LockBoxParameterSetAttributes->Header.ReturnStatus = (UINT64)-1;
  CopyMem (&LockBoxParameterSetAttributes->Guid, Guid, sizeof(*Guid));
  LockBoxParameterSetAttributes->Attributes = (UINT64)Attributes;

  //
  // Send command
  //
  CommSize = sizeof(CommBuffer);
  Status = SmmCommunication->Communicate (
                               SmmCommunication,
                               &CommBuffer[0],
                               &CommSize
                               );
  ASSERT_EFI_ERROR (Status);

  Status = (EFI_STATUS)LockBoxParameterSetAttributes->Header.ReturnStatus;

  DEBUG ((EFI_D_INFO, "SmmLockBoxDxeLib SetLockBoxAttributes - Exit (%r)\n", Status));

  //
  // Done
  //
  return Status;
}

/**
  This function will update confidential information to lockbox.

  @param Guid   the guid to identify the original confidential information
  @param Offset the offset of the original confidential information
  @param Buffer the address of the updated confidential information
  @param Length the length of the updated confidential information

  @retval RETURN_SUCCESS            the information is saved successfully.
  @retval RETURN_INVALID_PARAMETER  the Guid is NULL, or Buffer is NULL, or Length is 0.
  @retval RETURN_NOT_FOUND          the requested GUID not found.
  @retval RETURN_BUFFER_TOO_SMALL   the original buffer to too small to hold new information.
  @retval RETURN_ACCESS_DENIED      it is too late to invoke this interface
  @retval RETURN_NOT_STARTED        it is too early to invoke this interface
  @retval RETURN_UNSUPPORTED        the service is not supported by implementaion.
**/
RETURN_STATUS
EFIAPI
UpdateLockBox (
  IN  GUID                        *Guid,
  IN  UINTN                       Offset,
  IN  VOID                        *Buffer,
  IN  UINTN                       Length
  )
{
  EFI_STATUS                        Status;
  EFI_SMM_COMMUNICATION_PROTOCOL    *SmmCommunication;
  EFI_SMM_LOCK_BOX_PARAMETER_UPDATE *LockBoxParameterUpdate;
  EFI_SMM_COMMUNICATE_HEADER        *CommHeader;
  UINT8                             CommBuffer[sizeof(EFI_GUID) + sizeof(UINTN) + sizeof(EFI_SMM_LOCK_BOX_PARAMETER_UPDATE)];
  UINTN                             CommSize;

  DEBUG ((EFI_D_INFO, "SmmLockBoxDxeLib UpdateLockBox - Enter\n"));

  //
  // Basic check
  //
  if ((Guid == NULL) || (Buffer == NULL) || (Length == 0)) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // Get needed resource
  //
  Status = gBS->LocateProtocol (
                  &gEfiSmmCommunicationProtocolGuid,
                  NULL,
                  (VOID **)&SmmCommunication
                  );
  if (EFI_ERROR (Status)) {
    return EFI_NOT_STARTED;
  }

  //
  // Prepare parameter
  //
  CommHeader = (EFI_SMM_COMMUNICATE_HEADER *)&CommBuffer[0];
  CopyMem (&CommHeader->HeaderGuid, &gEfiSmmLockBoxCommunicationGuid, sizeof(gEfiSmmLockBoxCommunicationGuid));
  CommHeader->MessageLength = sizeof(*LockBoxParameterUpdate);

  LockBoxParameterUpdate = (EFI_SMM_LOCK_BOX_PARAMETER_UPDATE *)(UINTN)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data)];
  LockBoxParameterUpdate->Header.Command    = EFI_SMM_LOCK_BOX_COMMAND_UPDATE;
  LockBoxParameterUpdate->Header.DataLength = sizeof(*LockBoxParameterUpdate);
  LockBoxParameterUpdate->Header.ReturnStatus = (UINT64)-1;
  CopyMem (&LockBoxParameterUpdate->Guid, Guid, sizeof(*Guid));
  LockBoxParameterUpdate->Offset = (UINT64)Offset;
  LockBoxParameterUpdate->Buffer = (EFI_PHYSICAL_ADDRESS)(UINTN)Buffer;
  LockBoxParameterUpdate->Length = (UINT64)Length;

  //
  // Send command
  //
  CommSize = sizeof(CommBuffer);
  Status = SmmCommunication->Communicate (
                               SmmCommunication,
                               &CommBuffer[0],
                               &CommSize
                               );
  ASSERT_EFI_ERROR (Status);

  Status = (EFI_STATUS)LockBoxParameterUpdate->Header.ReturnStatus;

  DEBUG ((EFI_D_INFO, "SmmLockBoxDxeLib UpdateLockBox - Exit (%r)\n", Status));

  //
  // Done
  //
  return Status;
}

/**
  This function will restore confidential information from lockbox.

  @param Guid   the guid to identify the confidential information
  @param Buffer the address of the restored confidential information
                NULL means restored to original address, Length MUST be NULL at same time.
  @param Length the length of the restored confidential information

  @retval RETURN_SUCCESS            the information is restored successfully.
  @retval RETURN_INVALID_PARAMETER  the Guid is NULL, or one of Buffer and Length is NULL.
  @retval RETURN_WRITE_PROTECTED    Buffer and Length are NULL, but the LockBox has no 
                                    LOCK_BOX_ATTRIBUTE_RESTORE_IN_PLACE attribute.
  @retval RETURN_BUFFER_TOO_SMALL   the Length is too small to hold the confidential information.
  @retval RETURN_NOT_FOUND          the requested GUID not found.
  @retval RETURN_NOT_STARTED        it is too early to invoke this interface
  @retval RETURN_ACCESS_DENIED      not allow to restore to the address
  @retval RETURN_UNSUPPORTED        the service is not supported by implementaion.
**/
RETURN_STATUS
EFIAPI
RestoreLockBox (
  IN  GUID                        *Guid,
  IN  VOID                        *Buffer, OPTIONAL
  IN  OUT UINTN                   *Length  OPTIONAL
  )
{
  EFI_STATUS                         Status;
  EFI_SMM_COMMUNICATION_PROTOCOL     *SmmCommunication;
  EFI_SMM_LOCK_BOX_PARAMETER_RESTORE *LockBoxParameterRestore;
  EFI_SMM_COMMUNICATE_HEADER         *CommHeader;
  UINT8                              CommBuffer[sizeof(EFI_GUID) + sizeof(UINTN) + sizeof(EFI_SMM_LOCK_BOX_PARAMETER_RESTORE)];
  UINTN                              CommSize;

  DEBUG ((EFI_D_INFO, "SmmLockBoxDxeLib RestoreLockBox - Enter\n"));

  //
  // Basic check
  //
  if ((Guid == NULL) ||
      ((Buffer == NULL) && (Length != NULL)) ||
      ((Buffer != NULL) && (Length == NULL))) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // Get needed resource
  //
  Status = gBS->LocateProtocol (
                  &gEfiSmmCommunicationProtocolGuid,
                  NULL,
                  (VOID **)&SmmCommunication
                  );
  if (EFI_ERROR (Status)) {
    return EFI_NOT_STARTED;
  }

  //
  // Prepare parameter
  //
  CommHeader = (EFI_SMM_COMMUNICATE_HEADER *)&CommBuffer[0];
  CopyMem (&CommHeader->HeaderGuid, &gEfiSmmLockBoxCommunicationGuid, sizeof(gEfiSmmLockBoxCommunicationGuid));
  CommHeader->MessageLength = sizeof(*LockBoxParameterRestore);

  LockBoxParameterRestore = (EFI_SMM_LOCK_BOX_PARAMETER_RESTORE *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data)];
  LockBoxParameterRestore->Header.Command    = EFI_SMM_LOCK_BOX_COMMAND_RESTORE;
  LockBoxParameterRestore->Header.DataLength = sizeof(*LockBoxParameterRestore);
  LockBoxParameterRestore->Header.ReturnStatus = (UINT64)-1;
  CopyMem (&LockBoxParameterRestore->Guid, Guid, sizeof(*Guid));
  LockBoxParameterRestore->Buffer = (EFI_PHYSICAL_ADDRESS)(UINTN)Buffer;
  if (Length != NULL) {
    LockBoxParameterRestore->Length = (EFI_PHYSICAL_ADDRESS)*Length;
  } else {
    LockBoxParameterRestore->Length = 0;
  }

  //
  // Send command
  //
  CommSize = sizeof(CommBuffer);
  Status = SmmCommunication->Communicate (
                               SmmCommunication,
                               &CommBuffer[0],
                               &CommSize
                               );
  ASSERT_EFI_ERROR (Status);

  if (Length != NULL) {
    *Length = (UINTN)LockBoxParameterRestore->Length;
  }

  Status = (EFI_STATUS)LockBoxParameterRestore->Header.ReturnStatus;

  DEBUG ((EFI_D_INFO, "SmmLockBoxDxeLib RestoreLockBox - Exit (%r)\n", Status));

  //
  // Done
  //
  return Status;
}

/**
  This function will restore confidential information from all lockbox which have RestoreInPlace attribute.

  @retval RETURN_SUCCESS            the information is restored successfully.
  @retval RETURN_NOT_STARTED        it is too early to invoke this interface
  @retval RETURN_UNSUPPORTED        the service is not supported by implementaion.
**/
RETURN_STATUS
EFIAPI
RestoreAllLockBoxInPlace (
  VOID
  )
{
  EFI_STATUS                                      Status;
  EFI_SMM_COMMUNICATION_PROTOCOL                  *SmmCommunication;
  EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE *LockBoxParameterRestoreAllInPlace;
  EFI_SMM_COMMUNICATE_HEADER                      *CommHeader;
  UINT8                                           CommBuffer[sizeof(EFI_GUID) + sizeof(UINTN) + sizeof(EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE)];
  UINTN                                           CommSize;

  DEBUG ((EFI_D_INFO, "SmmLockBoxDxeLib RestoreAllLockBoxInPlace - Enter\n"));

  //
  // Get needed resource
  //
  Status = gBS->LocateProtocol (
                  &gEfiSmmCommunicationProtocolGuid,
                  NULL,
                  (VOID **)&SmmCommunication
                  );
  if (EFI_ERROR (Status)) {
    return EFI_NOT_STARTED;
  }

  //
  // Prepare parameter
  //
  CommHeader = (EFI_SMM_COMMUNICATE_HEADER *)&CommBuffer[0];
  CopyMem (&CommHeader->HeaderGuid, &gEfiSmmLockBoxCommunicationGuid, sizeof(gEfiSmmLockBoxCommunicationGuid));
  CommHeader->MessageLength = sizeof(*LockBoxParameterRestoreAllInPlace);

  LockBoxParameterRestoreAllInPlace = (EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data)];
  LockBoxParameterRestoreAllInPlace->Header.Command    = EFI_SMM_LOCK_BOX_COMMAND_RESTORE_ALL_IN_PLACE;
  LockBoxParameterRestoreAllInPlace->Header.DataLength = sizeof(*LockBoxParameterRestoreAllInPlace);
  LockBoxParameterRestoreAllInPlace->Header.ReturnStatus = (UINT64)-1;

  //
  // Send command
  //
  CommSize = sizeof(CommBuffer);
  Status = SmmCommunication->Communicate (
                               SmmCommunication,
                               &CommBuffer[0],
                               &CommSize
                               );
  ASSERT_EFI_ERROR (Status);

  Status = (EFI_STATUS)LockBoxParameterRestoreAllInPlace->Header.ReturnStatus;

  DEBUG ((EFI_D_INFO, "SmmLockBoxDxeLib RestoreAllLockBoxInPlace - Exit (%r)\n", Status));

  //
  // Done
  //
  return Status;
}