]>
Commit | Line | Data |
---|---|---|
2d093499 QL |
1 | /** @file\r |
2 | Pkcs7Verify Driver to produce the UEFI PKCS7 Verification Protocol.\r | |
3 | \r | |
4 | The driver will produce the UEFI PKCS7 Verification Protocol which is used to\r | |
5 | verify data signed using PKCS7 structure. The PKCS7 data to be verified must\r | |
6 | be ASN.1 (DER) encoded.\r | |
7 | \r | |
76b35710 | 8 | Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>\r |
2d093499 QL |
9 | This program and the accompanying materials\r |
10 | are licensed and made available under the terms and conditions of the BSD License\r | |
11 | which accompanies this distribution. The full text of the license may be found at\r | |
12 | http://opensource.org/licenses/bsd-license.php\r | |
13 | \r | |
14 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
15 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
16 | \r | |
17 | **/\r | |
18 | \r | |
19 | #include <Library/BaseLib.h>\r | |
20 | #include <Library/BaseMemoryLib.h>\r | |
21 | #include <Library/MemoryAllocationLib.h>\r | |
22 | #include <Library/UefiBootServicesTableLib.h>\r | |
23 | #include <Library/BaseCryptLib.h>\r | |
24 | #include <Protocol/Pkcs7Verify.h>\r | |
25 | \r | |
26 | #define MAX_DIGEST_SIZE SHA512_DIGEST_SIZE\r | |
27 | \r | |
28 | /**\r | |
29 | Calculates the hash of the given data based on the specified hash GUID.\r | |
30 | \r | |
31 | @param[in] Data Pointer to the data buffer to be hashed.\r | |
32 | @param[in] DataSize The size of data buffer in bytes.\r | |
33 | @param[in] CertGuid The GUID to identify the hash algorithm to be used.\r | |
34 | @param[out] HashValue Pointer to a buffer that receives the hash result.\r | |
35 | \r | |
36 | @retval TRUE Data hash calculation succeeded.\r | |
37 | @retval FALSE Data hash calculation failed.\r | |
38 | \r | |
39 | **/\r | |
40 | BOOLEAN\r | |
41 | CalculateDataHash (\r | |
42 | IN VOID *Data,\r | |
43 | IN UINTN DataSize,\r | |
44 | IN EFI_GUID *CertGuid,\r | |
45 | OUT UINT8 *HashValue\r | |
46 | )\r | |
47 | {\r | |
48 | BOOLEAN Status;\r | |
49 | VOID *HashCtx;\r | |
50 | UINTN CtxSize;\r | |
51 | \r | |
52 | Status = FALSE;\r | |
53 | HashCtx = NULL;\r | |
54 | \r | |
55 | if (CompareGuid (CertGuid, &gEfiCertSha1Guid)) {\r | |
56 | //\r | |
57 | // SHA-1 Hash\r | |
58 | //\r | |
59 | CtxSize = Sha1GetContextSize ();\r | |
60 | HashCtx = AllocatePool (CtxSize);\r | |
61 | if (HashCtx == NULL) {\r | |
62 | goto _Exit;\r | |
63 | }\r | |
64 | Status = Sha1Init (HashCtx);\r | |
65 | Status = Sha1Update (HashCtx, Data, DataSize);\r | |
66 | Status = Sha1Final (HashCtx, HashValue);\r | |
67 | \r | |
68 | } else if (CompareGuid (CertGuid, &gEfiCertSha256Guid)) {\r | |
69 | //\r | |
70 | // SHA256 Hash\r | |
71 | //\r | |
72 | CtxSize = Sha256GetContextSize ();\r | |
73 | HashCtx = AllocatePool (CtxSize);\r | |
74 | if (HashCtx == NULL) {\r | |
75 | goto _Exit;\r | |
76 | }\r | |
77 | Status = Sha256Init (HashCtx);\r | |
78 | Status = Sha256Update (HashCtx, Data, DataSize);\r | |
79 | Status = Sha256Final (HashCtx, HashValue);\r | |
80 | \r | |
81 | } else if (CompareGuid (CertGuid, &gEfiCertSha384Guid)) {\r | |
82 | //\r | |
83 | // SHA384 Hash\r | |
84 | //\r | |
85 | CtxSize = Sha384GetContextSize ();\r | |
86 | HashCtx = AllocatePool (CtxSize);\r | |
87 | if (HashCtx == NULL) {\r | |
88 | goto _Exit;\r | |
89 | }\r | |
90 | Status = Sha384Init (HashCtx);\r | |
91 | Status = Sha384Update (HashCtx, Data, DataSize);\r | |
92 | Status = Sha384Final (HashCtx, HashValue);\r | |
93 | \r | |
94 | } else if (CompareGuid (CertGuid, &gEfiCertSha512Guid)) {\r | |
95 | //\r | |
96 | // SHA512 Hash\r | |
97 | //\r | |
98 | CtxSize = Sha512GetContextSize ();\r | |
99 | HashCtx = AllocatePool (CtxSize);\r | |
100 | if (HashCtx == NULL) {\r | |
101 | goto _Exit;\r | |
102 | }\r | |
103 | Status = Sha512Init (HashCtx);\r | |
104 | Status = Sha512Update (HashCtx, Data, DataSize);\r | |
105 | Status = Sha512Final (HashCtx, HashValue);\r | |
106 | }\r | |
107 | \r | |
108 | _Exit:\r | |
109 | if (HashCtx != NULL) {\r | |
110 | FreePool (HashCtx);\r | |
111 | }\r | |
112 | \r | |
113 | return Status;\r | |
114 | }\r | |
115 | \r | |
116 | /**\r | |
117 | Check whether the hash of data content is revoked by the revocation database.\r | |
118 | \r | |
119 | @param[in] Content Pointer to the content buffer that is searched for.\r | |
120 | @param[in] ContentSize The size of data content in bytes.\r | |
121 | @param[in] RevokedDb Pointer to a list of pointers to EFI_SIGNATURE_LIST\r | |
122 | structure which contains list of X.509 certificates\r | |
123 | of revoked signers and revoked content hashes.\r | |
124 | \r | |
125 | @return TRUE The matched content hash is found in the revocation database.\r | |
126 | @return FALSE The matched content hash is not found in the revocation database.\r | |
127 | \r | |
128 | **/\r | |
129 | BOOLEAN\r | |
130 | IsContentHashRevoked (\r | |
131 | IN UINT8 *Content,\r | |
132 | IN UINTN ContentSize,\r | |
133 | IN EFI_SIGNATURE_LIST **RevokedDb\r | |
134 | )\r | |
135 | {\r | |
136 | EFI_SIGNATURE_LIST *SigList;\r | |
137 | EFI_SIGNATURE_DATA *SigData;\r | |
138 | UINTN Index;\r | |
139 | UINT8 HashVal[MAX_DIGEST_SIZE];\r | |
140 | UINTN EntryIndex;\r | |
141 | UINTN EntryCount;\r | |
142 | BOOLEAN Status;\r | |
143 | \r | |
144 | if (RevokedDb == NULL) {\r | |
145 | return FALSE;\r | |
146 | }\r | |
147 | \r | |
148 | Status = FALSE;\r | |
149 | //\r | |
150 | // Check if any hash matching content hash can be found in RevokedDB\r | |
151 | //\r | |
152 | for (Index = 0; ; Index++) {\r | |
153 | SigList = (EFI_SIGNATURE_LIST *)(RevokedDb[Index]);\r | |
154 | \r | |
155 | //\r | |
156 | // The list is terminated by a NULL pointer.\r | |
157 | //\r | |
158 | if (SigList == NULL) {\r | |
159 | break;\r | |
160 | }\r | |
161 | \r | |
162 | //\r | |
163 | // Calculate the digest of supplied data based on the signature hash type.\r | |
164 | //\r | |
165 | if (!CalculateDataHash (Content, ContentSize, &SigList->SignatureType, HashVal)) {\r | |
166 | //\r | |
167 | // Un-matched Hash GUID or other failure.\r | |
168 | //\r | |
169 | continue;\r | |
170 | }\r | |
171 | \r | |
172 | //\r | |
173 | // Search the signature database to search the revoked content hash\r | |
174 | //\r | |
175 | SigData = (EFI_SIGNATURE_DATA *) ((UINT8 *) SigList + sizeof (EFI_SIGNATURE_LIST) +\r | |
176 | SigList->SignatureHeaderSize);\r | |
177 | EntryCount = (SigList->SignatureListSize - SigList->SignatureHeaderSize -\r | |
178 | sizeof (EFI_SIGNATURE_LIST)) / SigList->SignatureSize;\r | |
179 | for (EntryIndex = 0; EntryIndex < EntryCount; EntryIndex++) {\r | |
180 | //\r | |
181 | // Compare Data Hash with Signature Data\r | |
182 | //\r | |
183 | if (CompareMem (SigData->SignatureData, HashVal, (SigList->SignatureSize - sizeof (EFI_GUID))) == 0) {\r | |
184 | Status = TRUE;\r | |
185 | goto _Exit;\r | |
186 | }\r | |
187 | \r | |
188 | SigData = (EFI_SIGNATURE_DATA *) ((UINT8 *) SigData + SigList->SignatureSize);\r | |
189 | }\r | |
190 | }\r | |
191 | \r | |
192 | _Exit:\r | |
193 | return Status;\r | |
194 | }\r | |
195 | \r | |
196 | /**\r | |
197 | Check whether the hash of an given certificate is revoked by the revocation database.\r | |
198 | \r | |
199 | @param[in] Certificate Pointer to the certificate that is searched for.\r | |
200 | @param[in] CertSize Size of certificate in bytes.\r | |
201 | @param[in] RevokedDb Pointer to a list of pointers to EFI_SIGNATURE_LIST\r | |
202 | structures which contains list of X.509 certificate\r | |
203 | of revoked signers and revoked content hashes.\r | |
204 | @param[out] RevocationTime Return the time that the certificate was revoked.\r | |
205 | \r | |
206 | @return TRUE The certificate hash is found in the revocation database.\r | |
207 | @return FALSE The certificate hash is not found in the revocation database.\r | |
208 | \r | |
209 | **/\r | |
210 | BOOLEAN\r | |
211 | IsCertHashRevoked (\r | |
212 | IN UINT8 *Certificate,\r | |
213 | IN UINTN CertSize,\r | |
214 | IN EFI_SIGNATURE_LIST **RevokedDb,\r | |
215 | OUT EFI_TIME *RevocationTime\r | |
216 | )\r | |
217 | {\r | |
218 | BOOLEAN Status;\r | |
219 | EFI_SIGNATURE_LIST *SigList;\r | |
220 | EFI_SIGNATURE_DATA *SigData;\r | |
221 | UINT8 *TBSCert;\r | |
222 | UINTN TBSCertSize;\r | |
223 | UINTN Index;\r | |
224 | UINTN EntryIndex;\r | |
225 | UINTN EntryCount;\r | |
226 | UINT8 CertHashVal[MAX_DIGEST_SIZE];\r | |
227 | \r | |
228 | if ((RevocationTime == NULL) || (RevokedDb == NULL)) {\r | |
229 | return FALSE;\r | |
230 | }\r | |
231 | \r | |
232 | //\r | |
233 | // Retrieve the TBSCertificate from the X.509 Certificate for hash calculation\r | |
234 | //\r | |
235 | if (!X509GetTBSCert (Certificate, CertSize, &TBSCert, &TBSCertSize)) {\r | |
236 | return FALSE;\r | |
237 | }\r | |
238 | \r | |
239 | Status = FALSE;\r | |
240 | for (Index = 0; ; Index++) {\r | |
241 | \r | |
242 | SigList = (EFI_SIGNATURE_LIST *)(RevokedDb[Index]);\r | |
243 | //\r | |
244 | // The list is terminated by a NULL pointer.\r | |
245 | //\r | |
246 | if (SigList == NULL) {\r | |
247 | break;\r | |
248 | }\r | |
249 | \r | |
250 | //\r | |
251 | // Determine Hash Algorithm based on the entry type in revocation database, and\r | |
252 | // calculate the certificate hash.\r | |
253 | //\r | |
254 | if (CompareGuid (&SigList->SignatureType, &gEfiCertX509Sha256Guid)) {\r | |
255 | Status = CalculateDataHash (TBSCert, TBSCertSize, &gEfiCertSha256Guid, CertHashVal);\r | |
256 | \r | |
257 | } else if (CompareGuid (&SigList->SignatureType, &gEfiCertX509Sha384Guid)) {\r | |
258 | Status = CalculateDataHash (TBSCert, TBSCertSize, &gEfiCertSha384Guid, CertHashVal);\r | |
259 | \r | |
260 | } else if (CompareGuid (&SigList->SignatureType, &gEfiCertX509Sha512Guid)) {\r | |
261 | Status = CalculateDataHash (TBSCert, TBSCertSize, &gEfiCertSha512Guid, CertHashVal);\r | |
262 | \r | |
263 | } else {\r | |
264 | //\r | |
265 | // Un-matched Cert Hash GUID\r | |
266 | //\r | |
267 | continue;\r | |
268 | }\r | |
269 | \r | |
270 | if (!Status) {\r | |
271 | continue;\r | |
272 | }\r | |
273 | \r | |
274 | SigData = (EFI_SIGNATURE_DATA *) ((UINT8 *) SigList + sizeof (EFI_SIGNATURE_LIST) +\r | |
275 | SigList->SignatureHeaderSize);\r | |
276 | EntryCount = (SigList->SignatureListSize - SigList->SignatureHeaderSize -\r | |
277 | sizeof (EFI_SIGNATURE_LIST)) / SigList->SignatureSize;\r | |
278 | for (EntryIndex = 0; EntryIndex < EntryCount; Index++) {\r | |
279 | //\r | |
280 | // Check if the Certificate Hash is revoked.\r | |
281 | //\r | |
282 | if (CompareMem (SigData->SignatureData, CertHashVal,\r | |
283 | SigList->SignatureSize - sizeof (EFI_GUID) - sizeof (EFI_TIME)) == 0) {\r | |
284 | Status = TRUE;\r | |
285 | //\r | |
286 | // Return the revocation time of this revoked certificate.\r | |
287 | //\r | |
288 | CopyMem (\r | |
289 | RevocationTime,\r | |
290 | (EFI_TIME *)((UINT8 *)SigData + SigList->SignatureSize - sizeof (EFI_TIME)),\r | |
291 | sizeof (EFI_TIME)\r | |
292 | );\r | |
293 | goto _Exit;\r | |
294 | }\r | |
295 | \r | |
296 | SigData = (EFI_SIGNATURE_DATA *) ((UINT8 *) SigData + SigList->SignatureSize);\r | |
297 | }\r | |
298 | }\r | |
299 | \r | |
300 | _Exit:\r | |
301 | return Status;\r | |
302 | }\r | |
303 | \r | |
304 | /**\r | |
305 | Check if the given time value is zero.\r | |
306 | \r | |
307 | @param[in] Time Pointer of a time value.\r | |
308 | \r | |
309 | @retval TRUE The Time is Zero.\r | |
310 | @retval FALSE The Time is not Zero.\r | |
311 | \r | |
312 | **/\r | |
313 | BOOLEAN\r | |
314 | IsTimeZero (\r | |
315 | IN EFI_TIME *Time\r | |
316 | )\r | |
317 | {\r | |
318 | if ((Time->Year == 0) && (Time->Month == 0) && (Time->Day == 0) &&\r | |
319 | (Time->Hour == 0) && (Time->Minute == 0) && (Time->Second == 0)) {\r | |
320 | return TRUE;\r | |
321 | }\r | |
322 | \r | |
323 | return FALSE;\r | |
324 | }\r | |
325 | \r | |
326 | /**\r | |
327 | Check whether the timestamp is valid by comparing the signing time and the revocation time.\r | |
328 | \r | |
329 | @param SigningTime Pointer to the signing time.\r | |
330 | @param RevocationTime Pointer to the revocation time.\r | |
331 | \r | |
332 | @retval TRUE The SigningTime is not later than the RevocationTime.\r | |
333 | @retval FALSE The SigningTime is later than the RevocationTime.\r | |
334 | \r | |
335 | **/\r | |
336 | BOOLEAN\r | |
337 | CompareTimestamp (\r | |
338 | IN EFI_TIME *SigningTime,\r | |
339 | IN EFI_TIME *RevocationTime\r | |
340 | )\r | |
341 | {\r | |
342 | if (SigningTime->Year != RevocationTime->Year) {\r | |
343 | return (BOOLEAN) (SigningTime->Year < RevocationTime->Year);\r | |
344 | } else if (SigningTime->Month != RevocationTime->Month) {\r | |
345 | return (BOOLEAN) (SigningTime->Month < RevocationTime->Month);\r | |
346 | } else if (SigningTime->Day != RevocationTime->Day) {\r | |
347 | return (BOOLEAN) (SigningTime->Day < RevocationTime->Day);\r | |
348 | } else if (SigningTime->Hour != RevocationTime->Hour) {\r | |
349 | return (BOOLEAN) (SigningTime->Hour < RevocationTime->Hour);\r | |
350 | } else if (SigningTime->Minute != RevocationTime->Minute) {\r | |
351 | return (BOOLEAN) (SigningTime->Minute < RevocationTime->Minute);\r | |
352 | }\r | |
353 | \r | |
354 | return (BOOLEAN) (SigningTime->Second <= RevocationTime->Second);\r | |
355 | }\r | |
356 | \r | |
357 | /**\r | |
358 | Check whether the timestamp signature embedded in PKCS7 signedData is valid and\r | |
359 | the signing time is also earlier than the revocation time.\r | |
360 | \r | |
361 | @param[in] SignedData Pointer to the PKCS#7 signedData.\r | |
362 | @param[in] SignedDataSize Size of SignedData in bytes.\r | |
363 | @param[in] TimeStampDb Pointer to a list of pointers to EFI_SIGNATURE_LIST\r | |
364 | structures which is used to pass a list of X.509\r | |
365 | certificates of trusted timestamp signers.\r | |
366 | @param[in] RevocationTime The time that the certificate was revoked.\r | |
367 | \r | |
368 | @retval TRUE Timestamp signature is valid and the signing time is no later\r | |
369 | than the revocation time.\r | |
370 | @retval FALSE Timestamp signature is not valid or the signing time is later\r | |
371 | than the revocation time.\r | |
372 | \r | |
373 | **/\r | |
374 | BOOLEAN\r | |
375 | IsValidTimestamp (\r | |
376 | IN UINT8 *SignedData,\r | |
377 | IN UINTN SignedDataSize,\r | |
378 | IN EFI_SIGNATURE_LIST **TimeStampDb,\r | |
379 | IN EFI_TIME *RevocationTime\r | |
380 | )\r | |
381 | {\r | |
382 | BOOLEAN Status;\r | |
383 | EFI_SIGNATURE_LIST *SigList;\r | |
384 | EFI_SIGNATURE_DATA *SigData;\r | |
385 | UINT8 *TsaCert;\r | |
386 | UINTN TsaCertSize;\r | |
387 | UINTN Index;\r | |
388 | EFI_TIME SigningTime;\r | |
389 | \r | |
390 | //\r | |
391 | // If no supplied database for verification or RevocationTime is zero,\r | |
392 | // the certificate shall be considered to always be revoked.\r | |
393 | //\r | |
394 | if ((TimeStampDb == NULL) || (IsTimeZero (RevocationTime))) {\r | |
395 | return FALSE;\r | |
396 | }\r | |
397 | \r | |
398 | Status = FALSE;\r | |
399 | //\r | |
400 | // RevocationTime is non-zero, the certificate should be considered to be revoked\r | |
401 | // from that time and onwards.\r | |
402 | //\r | |
403 | for (Index = 0; ; Index++) {\r | |
404 | SigList = (EFI_SIGNATURE_LIST *) (TimeStampDb[Index]);\r | |
405 | \r | |
406 | //\r | |
407 | // The list is terminated by a NULL pointer.\r | |
408 | //\r | |
409 | if (SigList == NULL) {\r | |
410 | break;\r | |
411 | }\r | |
412 | \r | |
413 | //\r | |
414 | // Ignore any non-X509-format entry in the list\r | |
415 | //\r | |
416 | if (!CompareGuid (&SigList->SignatureType, &gEfiCertX509Guid)) {\r | |
417 | continue;\r | |
418 | }\r | |
419 | \r | |
420 | \r | |
421 | SigData = (EFI_SIGNATURE_DATA *) ((UINT8 *) SigList + sizeof (EFI_SIGNATURE_LIST) +\r | |
422 | SigList->SignatureHeaderSize);\r | |
423 | TsaCert = SigData->SignatureData;\r | |
424 | TsaCertSize = SigList->SignatureSize - sizeof (EFI_GUID);\r | |
425 | \r | |
426 | //\r | |
427 | // Each TSA Certificate will normally be in a seperate EFI_SIGNATURE_LIST\r | |
428 | // Leverage ImageTimestampVerify interface for Timestamp counterSignature Verification\r | |
429 | //\r | |
430 | if (ImageTimestampVerify (SignedData, SignedDataSize, TsaCert, TsaCertSize, &SigningTime)) {\r | |
431 | //\r | |
432 | // The signer signature is valid only when the signing time is earlier than revocation time.\r | |
433 | //\r | |
434 | if (CompareTimestamp (&SigningTime, RevocationTime)) {\r | |
435 | Status = TRUE;\r | |
436 | break;\r | |
437 | }\r | |
438 | }\r | |
439 | }\r | |
440 | \r | |
441 | return Status;\r | |
442 | }\r | |
443 | \r | |
444 | /**\r | |
445 | Check whether the PKCS7 signedData is revoked by verifying with the revoked\r | |
446 | certificates database, and if the signedData is timestamped, the embedded timestamp\r | |
447 | couterSignature will be checked with the supplied timestamp database.\r | |
448 | \r | |
449 | @param[in] SignedData Pointer to buffer containing ASN.1 DER-encoded PKCS7\r | |
450 | signature.\r | |
451 | @param[in] SignedDataSize The size of SignedData buffer in bytes.\r | |
452 | @param[in] InData Pointer to the buffer containing the raw message data\r | |
453 | previously signed and to be verified.\r | |
454 | @param[in] InDataSize The size of InData buffer in bytes.\r | |
455 | @param[in] RevokedDb Pointer to a list of pointers to EFI_SIGNATURE_LIST\r | |
456 | structure which contains list of X.509 certificates\r | |
457 | of revoked signers and revoked content hashes.\r | |
458 | @param[in] TimeStampDb Pointer to a list of pointers to EFI_SIGNATURE_LIST\r | |
459 | structures which is used to pass a list of X.509\r | |
460 | certificates of trusted timestamp signers.\r | |
461 | \r | |
462 | @retval EFI_SUCCESS The PKCS7 signedData is revoked.\r | |
463 | @retval EFI_SECURITY_VIOLATION Fail to verify the signature in PKCS7 signedData.\r | |
464 | @retval EFI_INVALID_PARAMETER SignedData is NULL or SignedDataSize is zero.\r | |
465 | AllowedDb is NULL.\r | |
466 | Content is not NULL and ContentSize is NULL.\r | |
467 | @retval EFI_NOT_FOUND Content not found because InData is NULL and no\r | |
468 | content embedded in PKCS7 signedData.\r | |
469 | @retval EFI_UNSUPPORTED The PKCS7 signedData was not correctly formatted.\r | |
470 | \r | |
471 | **/\r | |
472 | EFI_STATUS\r | |
473 | P7CheckRevocation (\r | |
474 | IN UINT8 *SignedData,\r | |
475 | IN UINTN SignedDataSize,\r | |
476 | IN UINT8 *InData,\r | |
477 | IN UINTN InDataSize,\r | |
478 | IN EFI_SIGNATURE_LIST **RevokedDb,\r | |
479 | IN EFI_SIGNATURE_LIST **TimeStampDb\r | |
480 | )\r | |
481 | {\r | |
482 | EFI_STATUS Status;\r | |
483 | EFI_SIGNATURE_LIST *SigList;\r | |
484 | EFI_SIGNATURE_DATA *SigData;\r | |
485 | UINT8 *RevokedCert;\r | |
486 | UINTN RevokedCertSize;\r | |
487 | UINTN Index;\r | |
488 | UINT8 *CertBuffer;\r | |
489 | UINTN BufferLength;\r | |
490 | UINT8 *TrustedCert;\r | |
491 | UINTN TrustedCertLength;\r | |
492 | UINT8 CertNumber;\r | |
493 | UINT8 *CertPtr;\r | |
494 | UINT8 *Cert;\r | |
495 | UINTN CertSize;\r | |
496 | EFI_TIME RevocationTime;\r | |
497 | \r | |
498 | Status = EFI_UNSUPPORTED;\r | |
499 | SigData = NULL;\r | |
500 | RevokedCert = NULL;\r | |
501 | RevokedCertSize = 0;\r | |
502 | CertBuffer = NULL;\r | |
503 | TrustedCert = NULL;\r | |
504 | \r | |
505 | //\r | |
506 | // The signedData is revoked if the hash of content existed in RevokedDb\r | |
507 | //\r | |
508 | if (IsContentHashRevoked (InData, InDataSize, RevokedDb)) {\r | |
509 | Status = EFI_SUCCESS;\r | |
510 | goto _Exit;\r | |
511 | }\r | |
512 | \r | |
513 | //\r | |
514 | // Check if the signer's certificate can be found in Revoked database\r | |
515 | //\r | |
516 | for (Index = 0; ; Index++) {\r | |
517 | SigList = (EFI_SIGNATURE_LIST *)(RevokedDb[Index]);\r | |
518 | \r | |
519 | //\r | |
520 | // The list is terminated by a NULL pointer.\r | |
521 | //\r | |
522 | if (SigList == NULL) {\r | |
523 | break;\r | |
524 | }\r | |
525 | \r | |
526 | //\r | |
527 | // Ignore any non-X509-format entry in the list.\r | |
528 | //\r | |
529 | if (!CompareGuid (&SigList->SignatureType, &gEfiCertX509Guid)) {\r | |
530 | continue;\r | |
531 | }\r | |
532 | \r | |
533 | SigData = (EFI_SIGNATURE_DATA *) ((UINT8 *) SigList + sizeof (EFI_SIGNATURE_LIST) +\r | |
534 | SigList->SignatureHeaderSize);\r | |
535 | \r | |
536 | RevokedCert = SigData->SignatureData;\r | |
537 | RevokedCertSize = SigList->SignatureSize - sizeof (EFI_GUID);\r | |
538 | \r | |
539 | //\r | |
540 | // Verifying the PKCS#7 SignedData with the revoked certificate in RevokedDb\r | |
541 | //\r | |
542 | if (Pkcs7Verify (SignedData, SignedDataSize, RevokedCert, RevokedCertSize, InData, InDataSize)) {\r | |
543 | //\r | |
544 | // The signedData was verified by one entry in Revoked Database\r | |
545 | //\r | |
546 | Status = EFI_SUCCESS;\r | |
547 | break;\r | |
548 | }\r | |
549 | }\r | |
550 | \r | |
551 | if (!EFI_ERROR (Status)) {\r | |
552 | //\r | |
553 | // The signedData was revoked, since it was hit by RevokedDb\r | |
554 | //\r | |
555 | goto _Exit;\r | |
556 | }\r | |
557 | \r | |
558 | //\r | |
559 | // Now we will continue to check the X.509 Certificate Hash & Possible Timestamp\r | |
560 | //\r | |
561 | if ((TimeStampDb == NULL) || (*TimeStampDb == NULL)) {\r | |
562 | goto _Exit;\r | |
563 | }\r | |
564 | \r | |
565 | Pkcs7GetSigners (SignedData, SignedDataSize, &CertBuffer, &BufferLength, &TrustedCert, &TrustedCertLength);\r | |
566 | if ((BufferLength == 0) || (CertBuffer == NULL)) {\r | |
567 | Status = EFI_SUCCESS;\r | |
568 | goto _Exit;\r | |
569 | }\r | |
570 | \r | |
571 | //\r | |
572 | // Check if any hash of certificates embedded in P7 data is in the revoked database.\r | |
573 | //\r | |
574 | CertNumber = (UINT8) (*CertBuffer);\r | |
575 | CertPtr = CertBuffer + 1;\r | |
576 | for (Index = 0; Index < CertNumber; Index++) {\r | |
577 | //\r | |
578 | // Retrieve the Certificate data\r | |
579 | //\r | |
580 | CertSize = (UINTN) ReadUnaligned32 ((UINT32 *) CertPtr);\r | |
581 | Cert = (UINT8 *)CertPtr + sizeof (UINT32);\r | |
582 | \r | |
583 | if (IsCertHashRevoked (Cert, CertSize, RevokedDb, &RevocationTime)) {\r | |
584 | //\r | |
585 | // Check the timestamp signature and signing time to determine if p7 data can be trusted.\r | |
586 | //\r | |
587 | Status = EFI_SUCCESS;\r | |
588 | if (IsValidTimestamp (SignedData, SignedDataSize, TimeStampDb, &RevocationTime)) {\r | |
589 | //\r | |
590 | // Use EFI_NOT_READY to identify the P7Data is not reovked, because the timestamping\r | |
591 | // occured prior to the time of certificate revocation.\r | |
592 | //\r | |
593 | Status = EFI_NOT_READY;\r | |
594 | }\r | |
595 | \r | |
596 | goto _Exit;\r | |
597 | }\r | |
598 | \r | |
599 | CertPtr = CertPtr + sizeof (UINT32) + CertSize;\r | |
600 | }\r | |
601 | \r | |
602 | _Exit:\r | |
603 | Pkcs7FreeSigners (CertBuffer);\r | |
604 | Pkcs7FreeSigners (TrustedCert);\r | |
605 | \r | |
606 | return Status;\r | |
607 | }\r | |
608 | \r | |
609 | /**\r | |
610 | Check whether the PKCS7 signedData can be verified by the trusted certificates\r | |
611 | database, and return the content of the signedData if requested.\r | |
612 | \r | |
613 | @param[in] SignedData Pointer to buffer containing ASN.1 DER-encoded PKCS7\r | |
614 | signature.\r | |
615 | @param[in] SignedDataSize The size of SignedData buffer in bytes.\r | |
616 | @param[in] InData Pointer to the buffer containing the raw message data\r | |
617 | previously signed and to be verified.\r | |
618 | @param[in] InDataSize The size of InData buffer in bytes.\r | |
619 | @param[in] AllowedDb Pointer to a list of pointers to EFI_SIGNATURE_LIST\r | |
620 | structures which contains lists of X.509 certificates\r | |
621 | of approved signers.\r | |
2d093499 QL |
622 | \r |
623 | @retval EFI_SUCCESS The PKCS7 signedData is trusted.\r | |
624 | @retval EFI_SECURITY_VIOLATION Fail to verify the signature in PKCS7 signedData.\r | |
625 | @retval EFI_INVALID_PARAMETER SignedData is NULL or SignedDataSize is zero.\r | |
626 | AllowedDb is NULL.\r | |
627 | Content is not NULL and ContentSize is NULL.\r | |
628 | @retval EFI_NOT_FOUND Content not found because InData is NULL and no\r | |
629 | content embedded in PKCS7 signedData.\r | |
630 | @retval EFI_UNSUPPORTED The PKCS7 signedData was not correctly formatted.\r | |
631 | @retval EFI_BUFFER_TOO_SMALL The size of buffer indicated by ContentSize is too\r | |
632 | small to hold the content. ContentSize updated to\r | |
633 | the required size.\r | |
634 | \r | |
635 | **/\r | |
636 | EFI_STATUS\r | |
637 | P7CheckTrust (\r | |
638 | IN UINT8 *SignedData,\r | |
639 | IN UINTN SignedDataSize,\r | |
640 | IN UINT8 *InData,\r | |
641 | IN UINTN InDataSize,\r | |
642 | IN EFI_SIGNATURE_LIST **AllowedDb\r | |
643 | )\r | |
644 | {\r | |
645 | EFI_STATUS Status;\r | |
646 | EFI_SIGNATURE_LIST *SigList;\r | |
647 | EFI_SIGNATURE_DATA *SigData;\r | |
648 | UINT8 *TrustCert;\r | |
649 | UINTN TrustCertSize;\r | |
650 | UINTN Index;\r | |
651 | \r | |
652 | Status = EFI_SECURITY_VIOLATION;\r | |
653 | SigData = NULL;\r | |
654 | TrustCert = NULL;\r | |
655 | TrustCertSize = 0;\r | |
656 | \r | |
657 | if (AllowedDb == NULL) {\r | |
658 | return EFI_INVALID_PARAMETER;\r | |
659 | }\r | |
660 | \r | |
661 | //\r | |
662 | // Build Certificate Stack with all valid X509 certificates in the supplied\r | |
663 | // Signature List for PKCS7 Verification.\r | |
664 | //\r | |
665 | for (Index = 0; ; Index++) {\r | |
666 | SigList = (EFI_SIGNATURE_LIST *)(AllowedDb[Index]);\r | |
667 | \r | |
668 | //\r | |
669 | // The list is terminated by a NULL pointer.\r | |
670 | //\r | |
671 | if (SigList == NULL) {\r | |
672 | break;\r | |
673 | }\r | |
674 | \r | |
675 | //\r | |
676 | // Ignore any non-X509-format entry in the list.\r | |
677 | //\r | |
678 | if (!CompareGuid (&SigList->SignatureType, &gEfiCertX509Guid)) {\r | |
679 | continue;\r | |
680 | }\r | |
681 | \r | |
682 | SigData = (EFI_SIGNATURE_DATA *) ((UINT8 *) SigList + sizeof (EFI_SIGNATURE_LIST) +\r | |
683 | SigList->SignatureHeaderSize);\r | |
684 | \r | |
685 | TrustCert = SigData->SignatureData;\r | |
686 | TrustCertSize = SigList->SignatureSize - sizeof (EFI_GUID);\r | |
687 | \r | |
688 | //\r | |
689 | // Verifying the PKCS#7 SignedData with the trusted certificate from AllowedDb\r | |
690 | //\r | |
691 | if (Pkcs7Verify (SignedData, SignedDataSize, TrustCert, TrustCertSize, InData, InDataSize)) {\r | |
692 | //\r | |
693 | // The SignedData was verified successfully by one entry in Trusted Database\r | |
694 | //\r | |
695 | Status = EFI_SUCCESS;\r | |
696 | break;\r | |
697 | }\r | |
698 | }\r | |
699 | \r | |
700 | return Status;\r | |
701 | }\r | |
702 | \r | |
703 | /**\r | |
704 | Processes a buffer containing binary DER-encoded PKCS7 signature.\r | |
705 | The signed data content may be embedded within the buffer or separated. Function\r | |
706 | verifies the signature of the content is valid and signing certificate was not\r | |
707 | revoked and is contained within a list of trusted signers.\r | |
708 | \r | |
709 | @param[in] This Pointer to EFI_PKCS7_VERIFY_PROTOCOL instance.\r | |
710 | @param[in] SignedData Points to buffer containing ASN.1 DER-encoded PKCS7\r | |
711 | signature.\r | |
712 | @param[in] SignedDataSize The size of SignedData buffer in bytes.\r | |
713 | @param[in] InData In case of detached signature, InData points to\r | |
714 | buffer containing the raw message data previously\r | |
715 | signed and to be verified by function. In case of\r | |
716 | SignedData containing embedded data, InData must be\r | |
717 | NULL.\r | |
718 | @param[in] InDataSize When InData is used, the size of InData buffer in\r | |
719 | bytes. When InData is NULL. This parameter must be\r | |
720 | 0.\r | |
721 | @param[in] AllowedDb Pointer to a list of pointers to EFI_SIGNATURE_LIST\r | |
722 | structures. The list is terminated by a null\r | |
723 | pointer. The EFI_SIGNATURE_LIST structures contain\r | |
724 | lists of X.509 certificates of approved signers.\r | |
725 | Function recognizes signer certificates of type\r | |
726 | EFI_CERT_X509_GUID. Any hash certificate in AllowedDb\r | |
727 | list is ignored by this function. Function returns\r | |
728 | success if signer of the buffer is within this list\r | |
729 | (and not within RevokedDb). This parameter is\r | |
730 | required.\r | |
731 | @param[in] RevokedDb Optional pointer to a list of pointers to\r | |
732 | EFI_SIGNATURE_LIST structures. The list is terminated\r | |
733 | by a null pointer. List of X.509 certificates of\r | |
734 | revoked signers and revoked file hashes. Except as\r | |
735 | noted in description of TimeStampDb signature\r | |
736 | verification will always fail if the signer of the\r | |
737 | file or the hash of the data component of the buffer\r | |
738 | is in RevokedDb list. This list is optional and\r | |
739 | caller may pass Null or pointer to NULL if not\r | |
740 | required.\r | |
741 | @param[in] TimeStampDb Optional pointer to a list of pointers to\r | |
742 | EFI_SIGNATURE_LIST structures. The list is terminated\r | |
743 | by a null pointer. This parameter can be used to pass\r | |
744 | a list of X.509 certificates of trusted time stamp\r | |
745 | signers. This list is optional and caller must pass\r | |
746 | Null or pointer to NULL if not required.\r | |
747 | @param[out] Content On input, points to an optional caller-allocated\r | |
748 | buffer into which the function will copy the content\r | |
749 | portion of the file after verification succeeds.\r | |
750 | This parameter is optional and if NULL, no copy of\r | |
751 | content from file is performed.\r | |
752 | @param[in,out] ContentSize On input, points to the size in bytes of the optional\r | |
753 | buffer Content previously allocated by caller. On\r | |
754 | output, if the verification succeeds, the value\r | |
755 | referenced by ContentSize will contain the actual\r | |
756 | size of the content from signed file. If ContentSize\r | |
757 | indicates the caller-allocated buffer is too small\r | |
758 | to contain content, an error is returned, and\r | |
759 | ContentSize will be updated with the required size.\r | |
760 | This parameter must be 0 if Content is Null.\r | |
761 | \r | |
762 | @retval EFI_SUCCESS Content signature was verified against hash of\r | |
763 | content, the signer's certificate was not found in\r | |
764 | RevokedDb, and was found in AllowedDb or if in signer\r | |
765 | is found in both AllowedDb and RevokedDb, the\r | |
766 | signing was allowed by reference to TimeStampDb as\r | |
767 | described above, and no hash matching content hash\r | |
768 | was found in RevokedDb.\r | |
769 | @retval EFI_SECURITY_VIOLATION The SignedData buffer was correctly formatted but\r | |
770 | signer was in RevokedDb or not in AllowedDb. Also\r | |
771 | returned if matching content hash found in RevokedDb.\r | |
772 | @retval EFI_COMPROMISED_DATA Calculated hash differs from signed hash.\r | |
773 | @retval EFI_INVALID_PARAMETER SignedData is NULL or SignedDataSize is zero.\r | |
774 | AllowedDb is NULL.\r | |
775 | @retval EFI_INVALID_PARAMETER Content is not NULL and ContentSize is NULL.\r | |
776 | @retval EFI_ABORTED Unsupported or invalid format in TimeStampDb,\r | |
777 | RevokedDb or AllowedDb list contents was detected.\r | |
778 | @retval EFI_NOT_FOUND Content not found because InData is NULL and no\r | |
779 | content embedded in SignedData.\r | |
780 | @retval EFI_UNSUPPORTED The SignedData buffer was not correctly formatted\r | |
781 | for processing by the function.\r | |
782 | @retval EFI_UNSUPPORTED Signed data embedded in SignedData but InData is not\r | |
783 | NULL.\r | |
784 | @retval EFI_BUFFER_TOO_SMALL The size of buffer indicated by ContentSize is too\r | |
785 | small to hold the content. ContentSize updated to\r | |
786 | required size.\r | |
787 | \r | |
788 | **/\r | |
789 | EFI_STATUS\r | |
790 | EFIAPI\r | |
791 | VerifyBuffer (\r | |
792 | IN EFI_PKCS7_VERIFY_PROTOCOL *This,\r | |
793 | IN VOID *SignedData,\r | |
794 | IN UINTN SignedDataSize,\r | |
795 | IN VOID *InData OPTIONAL,\r | |
796 | IN UINTN InDataSize,\r | |
797 | IN EFI_SIGNATURE_LIST **AllowedDb,\r | |
798 | IN EFI_SIGNATURE_LIST **RevokedDb OPTIONAL,\r | |
799 | IN EFI_SIGNATURE_LIST **TimeStampDb OPTIONAL,\r | |
800 | OUT VOID *Content OPTIONAL,\r | |
801 | IN OUT UINTN *ContentSize\r | |
802 | )\r | |
803 | {\r | |
76b35710 LQ |
804 | EFI_STATUS Status;\r |
805 | EFI_SIGNATURE_LIST *SigList;\r | |
806 | UINTN Index;\r | |
807 | UINT8 *AttachedData;\r | |
808 | UINTN AttachedDataSize;\r | |
809 | UINT8 *DataPtr;\r | |
810 | UINTN DataSize;\r | |
2d093499 QL |
811 | \r |
812 | //\r | |
813 | // Parameters Checking\r | |
814 | //\r | |
815 | if ((SignedData == NULL) || (SignedDataSize == 0) || (AllowedDb == NULL)) {\r | |
816 | return EFI_INVALID_PARAMETER;\r | |
817 | }\r | |
818 | if ((Content != NULL) && (ContentSize == NULL)) {\r | |
819 | return EFI_INVALID_PARAMETER;\r | |
820 | }\r | |
821 | \r | |
76b35710 LQ |
822 | //\r |
823 | // Check if any invalid entry format in AllowedDb list contents\r | |
824 | //\r | |
825 | for (Index = 0; ; Index++) {\r | |
826 | SigList = (EFI_SIGNATURE_LIST *)(AllowedDb[Index]);\r | |
827 | \r | |
828 | if (SigList == NULL) {\r | |
829 | break;\r | |
830 | }\r | |
831 | if (SigList->SignatureListSize < sizeof (EFI_SIGNATURE_LIST) +\r | |
832 | SigList->SignatureHeaderSize +\r | |
833 | SigList->SignatureSize) {\r | |
834 | return EFI_ABORTED;\r | |
835 | }\r | |
836 | }\r | |
837 | \r | |
838 | //\r | |
839 | // Check if any invalid entry format in RevokedDb list contents\r | |
840 | //\r | |
841 | if (RevokedDb != NULL) {\r | |
842 | for (Index = 0; ; Index++) {\r | |
843 | SigList = (EFI_SIGNATURE_LIST *)(RevokedDb[Index]);\r | |
844 | \r | |
845 | if (SigList == NULL) {\r | |
846 | break;\r | |
847 | }\r | |
848 | if (SigList->SignatureListSize < sizeof (EFI_SIGNATURE_LIST) +\r | |
849 | SigList->SignatureHeaderSize +\r | |
850 | SigList->SignatureSize) {\r | |
851 | return EFI_ABORTED;\r | |
852 | }\r | |
853 | }\r | |
854 | }\r | |
855 | \r | |
856 | //\r | |
857 | // Check if any invalid entry format in TimeStampDb list contents\r | |
858 | //\r | |
859 | if (TimeStampDb != NULL) {\r | |
860 | for (Index = 0; ; Index++) {\r | |
861 | SigList = (EFI_SIGNATURE_LIST *)(TimeStampDb[Index]);\r | |
862 | \r | |
863 | if (SigList == NULL) {\r | |
864 | break;\r | |
865 | }\r | |
866 | if (SigList->SignatureListSize < sizeof (EFI_SIGNATURE_LIST) +\r | |
867 | SigList->SignatureHeaderSize +\r | |
868 | SigList->SignatureSize) {\r | |
869 | return EFI_ABORTED;\r | |
870 | }\r | |
871 | }\r | |
872 | }\r | |
873 | \r | |
2d093499 QL |
874 | //\r |
875 | // Try to retrieve the attached content from PKCS7 signedData\r | |
876 | //\r | |
877 | AttachedData = NULL;\r | |
878 | AttachedDataSize = 0;\r | |
879 | if (!Pkcs7GetAttachedContent (\r | |
880 | SignedData,\r | |
881 | SignedDataSize,\r | |
882 | (VOID **)&AttachedData,\r | |
883 | &AttachedDataSize)) {\r | |
884 | //\r | |
885 | // The SignedData buffer was not correctly formatted for processing\r | |
886 | //\r | |
887 | return EFI_UNSUPPORTED;\r | |
888 | }\r | |
889 | if (AttachedData != NULL) {\r | |
173a1e68 QL |
890 | if (InData != NULL) {\r |
891 | //\r | |
892 | // The embedded content is found in SignedData but InData is not NULL\r | |
893 | //\r | |
894 | Status = EFI_UNSUPPORTED;\r | |
895 | goto _Exit;\r | |
896 | }\r | |
2d093499 QL |
897 | //\r |
898 | // PKCS7-formatted signedData with attached content; Use the embedded\r | |
899 | // content for verification\r | |
900 | //\r | |
901 | DataPtr = AttachedData;\r | |
902 | DataSize = AttachedDataSize;\r | |
903 | \r | |
904 | } else if (InData != NULL) {\r | |
905 | //\r | |
906 | // PKCS7-formatted signedData with detached content; Use the user-supplied\r | |
907 | // input data for verification\r | |
908 | //\r | |
909 | DataPtr = (UINT8 *)InData;\r | |
910 | DataSize = InDataSize;\r | |
911 | } else {\r | |
912 | //\r | |
913 | // Content not found because InData is NULL and no content attached in SignedData\r | |
914 | //\r | |
915 | Status = EFI_NOT_FOUND;\r | |
916 | goto _Exit;\r | |
917 | }\r | |
918 | \r | |
919 | Status = EFI_UNSUPPORTED;\r | |
920 | \r | |
921 | //\r | |
922 | // Verify PKCS7 SignedData with Revoked database\r | |
923 | //\r | |
924 | if (RevokedDb != NULL) {\r | |
925 | Status = P7CheckRevocation (\r | |
926 | SignedData,\r | |
927 | SignedDataSize,\r | |
928 | DataPtr,\r | |
929 | DataSize,\r | |
930 | RevokedDb,\r | |
931 | TimeStampDb\r | |
932 | );\r | |
933 | if (!EFI_ERROR (Status)) {\r | |
934 | //\r | |
935 | // The PKCS7 SignedData is reovked\r | |
936 | //\r | |
937 | Status = EFI_SECURITY_VIOLATION;\r | |
938 | goto _Exit;\r | |
939 | }\r | |
940 | }\r | |
941 | \r | |
942 | //\r | |
943 | // Verify PKCS7 SignedData with AllowedDB\r | |
944 | //\r | |
945 | Status = P7CheckTrust (\r | |
946 | SignedData,\r | |
947 | SignedDataSize,\r | |
948 | DataPtr,\r | |
949 | DataSize,\r | |
950 | AllowedDb\r | |
951 | );\r | |
952 | if (EFI_ERROR (Status)) {\r | |
953 | //\r | |
954 | // Verification failed with AllowedDb\r | |
955 | //\r | |
956 | goto _Exit;\r | |
957 | }\r | |
958 | \r | |
959 | //\r | |
960 | // Copy the content portion after verification succeeds\r | |
961 | //\r | |
962 | if (Content != NULL) {\r | |
963 | if (*ContentSize < DataSize) {\r | |
964 | //\r | |
965 | // Caller-allocated buffer is too small to contain content\r | |
966 | //\r | |
967 | *ContentSize = DataSize;\r | |
968 | Status = EFI_BUFFER_TOO_SMALL;\r | |
969 | } else {\r | |
970 | *ContentSize = DataSize;\r | |
971 | CopyMem (Content, DataPtr, DataSize);\r | |
972 | }\r | |
973 | }\r | |
974 | \r | |
975 | _Exit:\r | |
976 | if (AttachedData != NULL) {\r | |
977 | FreePool (AttachedData);\r | |
978 | }\r | |
979 | \r | |
980 | return Status;\r | |
981 | }\r | |
982 | \r | |
983 | /**\r | |
984 | Processes a buffer containing binary DER-encoded detached PKCS7 signature.\r | |
985 | The hash of the signed data content is calculated and passed by the caller. Function\r | |
986 | verifies the signature of the content is valid and signing certificate was not revoked\r | |
987 | and is contained within a list of trusted signers.\r | |
988 | \r | |
989 | @param[in] This Pointer to EFI_PKCS7_VERIFY_PROTOCOL instance.\r | |
990 | @param[in] Signature Points to buffer containing ASN.1 DER-encoded PKCS\r | |
991 | detached signature.\r | |
992 | @param[in] SignatureSize The size of Signature buffer in bytes.\r | |
993 | @param[in] InHash InHash points to buffer containing the caller\r | |
994 | calculated hash of the data. The parameter may not\r | |
995 | be NULL.\r | |
996 | @param[in] InHashSize The size in bytes of InHash buffer.\r | |
997 | @param[in] AllowedDb Pointer to a list of pointers to EFI_SIGNATURE_LIST\r | |
998 | structures. The list is terminated by a null\r | |
999 | pointer. The EFI_SIGNATURE_LIST structures contain\r | |
1000 | lists of X.509 certificates of approved signers.\r | |
1001 | Function recognizes signer certificates of type\r | |
1002 | EFI_CERT_X509_GUID. Any hash certificate in AllowedDb\r | |
1003 | list is ignored by this function. Function returns\r | |
1004 | success if signer of the buffer is within this list\r | |
1005 | (and not within RevokedDb). This parameter is\r | |
1006 | required.\r | |
1007 | @param[in] RevokedDb Optional pointer to a list of pointers to\r | |
1008 | EFI_SIGNATURE_LIST structures. The list is terminated\r | |
1009 | by a null pointer. List of X.509 certificates of\r | |
1010 | revoked signers and revoked file hashes. Signature\r | |
1011 | verification will always fail if the signer of the\r | |
1012 | file or the hash of the data component of the buffer\r | |
1013 | is in RevokedDb list. This parameter is optional\r | |
1014 | and caller may pass Null if not required.\r | |
1015 | @param[in] TimeStampDb Optional pointer to a list of pointers to\r | |
1016 | EFI_SIGNATURE_LIST structures. The list is terminated\r | |
1017 | by a null pointer. This parameter can be used to pass\r | |
1018 | a list of X.509 certificates of trusted time stamp\r | |
1019 | counter-signers.\r | |
1020 | \r | |
1021 | @retval EFI_SUCCESS Signed hash was verified against caller-provided\r | |
1022 | hash of content, the signer's certificate was not\r | |
1023 | found in RevokedDb, and was found in AllowedDb or\r | |
1024 | if in signer is found in both AllowedDb and\r | |
1025 | RevokedDb, the signing was allowed by reference to\r | |
1026 | TimeStampDb as described above, and no hash matching\r | |
1027 | content hash was found in RevokedDb.\r | |
1028 | @retval EFI_SECURITY_VIOLATION The SignedData buffer was correctly formatted but\r | |
1029 | signer was in RevokedDb or not in AllowedDb. Also\r | |
1030 | returned if matching content hash found in RevokedDb.\r | |
1031 | @retval EFI_COMPROMISED_DATA Caller provided hash differs from signed hash. Or,\r | |
1032 | caller and encrypted hash are different sizes.\r | |
1033 | @retval EFI_INVALID_PARAMETER Signature is NULL or SignatureSize is zero. InHash\r | |
1034 | is NULL or InHashSize is zero. AllowedDb is NULL.\r | |
1035 | @retval EFI_ABORTED Unsupported or invalid format in TimeStampDb,\r | |
1036 | RevokedDb or AllowedDb list contents was detected.\r | |
1037 | @retval EFI_UNSUPPORTED The Signature buffer was not correctly formatted\r | |
1038 | for processing by the function.\r | |
1039 | \r | |
1040 | **/\r | |
1041 | EFI_STATUS\r | |
1042 | EFIAPI\r | |
1043 | VerifySignature (\r | |
1044 | IN EFI_PKCS7_VERIFY_PROTOCOL *This,\r | |
1045 | IN VOID *Signature,\r | |
1046 | IN UINTN SignatureSize,\r | |
1047 | IN VOID *InHash,\r | |
1048 | IN UINTN InHashSize,\r | |
1049 | IN EFI_SIGNATURE_LIST **AllowedDb,\r | |
1050 | IN EFI_SIGNATURE_LIST **RevokedDb OPTIONAL,\r | |
1051 | IN EFI_SIGNATURE_LIST **TimeStampDb OPTIONAL\r | |
1052 | )\r | |
1053 | {\r | |
1054 | //\r | |
1055 | // NOTE: Current EDKII-OpenSSL interface cannot support VerifySignature\r | |
1056 | // directly. EFI_UNSUPPORTED is returned in this version.\r | |
1057 | //\r | |
1058 | return EFI_UNSUPPORTED;\r | |
1059 | }\r | |
1060 | \r | |
1061 | //\r | |
1062 | // The PKCS7 Verification Protocol\r | |
1063 | //\r | |
1064 | EFI_PKCS7_VERIFY_PROTOCOL mPkcs7Verify = {\r | |
1065 | VerifyBuffer,\r | |
1066 | VerifySignature\r | |
1067 | };\r | |
1068 | \r | |
1069 | /**\r | |
1070 | The user Entry Point for the PKCS7 Verification driver.\r | |
1071 | \r | |
1072 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r | |
1073 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
1074 | \r | |
1075 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
1076 | @retval EFI_NOT_SUPPORTED Platform does not support PKCS7 Verification.\r | |
1077 | @retval Other Some error occurs when executing this entry point.\r | |
1078 | \r | |
1079 | **/\r | |
1080 | EFI_STATUS\r | |
1081 | EFIAPI\r | |
1082 | Pkcs7VerifyDriverEntry (\r | |
1083 | IN EFI_HANDLE ImageHandle,\r | |
1084 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1085 | )\r | |
1086 | {\r | |
1087 | EFI_STATUS Status;\r | |
1088 | EFI_HANDLE Handle;\r | |
1089 | \r | |
1090 | //\r | |
1091 | // Install UEFI Pkcs7 Verification Protocol\r | |
1092 | //\r | |
1093 | Handle = NULL;\r | |
1094 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
1095 | &Handle,\r | |
1096 | &gEfiPkcs7VerifyProtocolGuid,\r | |
1097 | &mPkcs7Verify,\r | |
1098 | NULL\r | |
1099 | );\r | |
1100 | \r | |
1101 | return Status;\r | |
1102 | }\r |