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2ac68e8b QL |
1 | /** @file\r |
2 | RFC3161 Timestamp Countersignature Verification over OpenSSL.\r | |
3 | The timestamp is generated by a TimeStamping Authority (TSA) and asserts that a\r | |
4 | publisher's signature existed before the specified time. The timestamp extends\r | |
5 | the lifetime of the signature when a signing certificate expires or is later\r | |
6 | revoked.\r | |
7 | \r | |
f56b11d2 | 8 | Copyright (c) 2014 - 2017, Intel Corporation. All rights reserved.<BR>\r |
2ac68e8b 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 "InternalCryptLib.h"\r | |
20 | \r | |
21 | #include <openssl/asn1.h>\r | |
22 | #include <openssl/asn1t.h>\r | |
23 | #include <openssl/x509.h>\r | |
24 | #include <openssl/x509v3.h>\r | |
25 | #include <openssl/pkcs7.h>\r | |
26 | \r | |
27 | //\r | |
28 | // OID ASN.1 Value for SPC_RFC3161_OBJID ("1.3.6.1.4.1.311.3.3.1")\r | |
29 | //\r | |
30 | UINT8 mSpcRFC3161OidValue[] = {\r | |
31 | 0x2b, 0x06, 0x01, 0x04, 0x01, 0x82, 0x37, 0x03, 0x03, 0x01\r | |
32 | };\r | |
33 | \r | |
34 | ///\r | |
35 | /// The messageImprint field SHOULD contain the hash of the datum to be\r | |
36 | /// time-stamped. The hash is represented as an OCTET STRING. Its\r | |
37 | /// length MUST match the length of the hash value for that algorithm\r | |
38 | /// (e.g., 20 bytes for SHA-1 or 16 bytes for MD5).\r | |
39 | ///\r | |
40 | /// MessageImprint ::= SEQUENCE {\r | |
41 | /// hashAlgorithm AlgorithmIdentifier,\r | |
42 | /// hashedMessage OCTET STRING }\r | |
43 | ///\r | |
44 | typedef struct {\r | |
45 | X509_ALGOR *HashAlgorithm;\r | |
46 | ASN1_OCTET_STRING *HashedMessage;\r | |
47 | } TS_MESSAGE_IMPRINT;\r | |
48 | \r | |
49 | //\r | |
50 | // ASN.1 Functions for TS_MESSAGE_IMPRINT\r | |
51 | //\r | |
52 | DECLARE_ASN1_FUNCTIONS (TS_MESSAGE_IMPRINT)\r | |
53 | ASN1_SEQUENCE (TS_MESSAGE_IMPRINT) = {\r | |
54 | ASN1_SIMPLE (TS_MESSAGE_IMPRINT, HashAlgorithm, X509_ALGOR),\r | |
55 | ASN1_SIMPLE (TS_MESSAGE_IMPRINT, HashedMessage, ASN1_OCTET_STRING)\r | |
56 | } ASN1_SEQUENCE_END (TS_MESSAGE_IMPRINT)\r | |
57 | IMPLEMENT_ASN1_FUNCTIONS (TS_MESSAGE_IMPRINT)\r | |
58 | \r | |
59 | ///\r | |
60 | /// Accuracy represents the time deviation around the UTC time contained\r | |
61 | /// in GeneralizedTime of time-stamp token.\r | |
62 | ///\r | |
63 | /// Accuracy ::= SEQUENCE {\r | |
64 | /// seconds INTEGER OPTIONAL,\r | |
65 | /// millis [0] INTEGER (1..999) OPTIONAL,\r | |
66 | /// micros [1] INTEGER (1..999) OPTIONAL }\r | |
67 | ///\r | |
68 | typedef struct {\r | |
69 | ASN1_INTEGER *Seconds;\r | |
70 | ASN1_INTEGER *Millis;\r | |
71 | ASN1_INTEGER *Micros;\r | |
72 | } TS_ACCURACY;\r | |
73 | \r | |
74 | //\r | |
75 | // ASN.1 Functions for TS_ACCURACY\r | |
76 | //\r | |
77 | DECLARE_ASN1_FUNCTIONS (TS_ACCURACY)\r | |
78 | ASN1_SEQUENCE (TS_ACCURACY) = {\r | |
79 | ASN1_OPT (TS_ACCURACY, Seconds, ASN1_INTEGER),\r | |
80 | ASN1_IMP_OPT (TS_ACCURACY, Millis, ASN1_INTEGER, 0),\r | |
81 | ASN1_IMP_OPT (TS_ACCURACY, Micros, ASN1_INTEGER, 1)\r | |
82 | } ASN1_SEQUENCE_END (TS_ACCURACY)\r | |
83 | IMPLEMENT_ASN1_FUNCTIONS (TS_ACCURACY)\r | |
84 | \r | |
85 | ///\r | |
86 | /// The timestamp token info resulting from a successful timestamp request,\r | |
87 | /// as defined in RFC 3161.\r | |
88 | ///\r | |
89 | /// TSTInfo ::= SEQUENCE {\r | |
90 | /// version INTEGER { v1(1) },\r | |
91 | /// policy TSAPolicyId,\r | |
92 | /// messageImprint MessageImprint,\r | |
93 | /// -- MUST have the same value as the similar field in\r | |
94 | /// -- TimeStampReq\r | |
95 | /// serialNumber INTEGER,\r | |
96 | /// -- Time-Stamping users MUST be ready to accommodate integers\r | |
97 | /// -- up to 160 bits.\r | |
98 | /// genTime GeneralizedTime,\r | |
99 | /// accuracy Accuracy OPTIONAL,\r | |
100 | /// ordering BOOLEAN DEFAULT FALSE,\r | |
101 | /// nonce INTEGER OPTIONAL,\r | |
102 | /// -- MUST be present if the similar field was present\r | |
103 | /// -- in TimeStampReq. In that case it MUST have the same value.\r | |
104 | /// tsa [0] GeneralName OPTIONAL,\r | |
105 | /// extensions [1] IMPLICIT Extensions OPTIONAL }\r | |
106 | ///\r | |
107 | typedef struct {\r | |
108 | ASN1_INTEGER *Version;\r | |
109 | ASN1_OBJECT *Policy;\r | |
110 | TS_MESSAGE_IMPRINT *MessageImprint;\r | |
111 | ASN1_INTEGER *SerialNumber;\r | |
112 | ASN1_GENERALIZEDTIME *GenTime;\r | |
113 | TS_ACCURACY *Accuracy;\r | |
114 | ASN1_BOOLEAN Ordering;\r | |
115 | ASN1_INTEGER *Nonce;\r | |
116 | GENERAL_NAME *Tsa;\r | |
117 | STACK_OF(X509_EXTENSION) *Extensions;\r | |
118 | } TS_TST_INFO;\r | |
119 | \r | |
120 | //\r | |
121 | // ASN.1 Functions for TS_TST_INFO\r | |
122 | //\r | |
123 | DECLARE_ASN1_FUNCTIONS (TS_TST_INFO)\r | |
124 | ASN1_SEQUENCE (TS_TST_INFO) = {\r | |
125 | ASN1_SIMPLE (TS_TST_INFO, Version, ASN1_INTEGER),\r | |
126 | ASN1_SIMPLE (TS_TST_INFO, Policy, ASN1_OBJECT),\r | |
127 | ASN1_SIMPLE (TS_TST_INFO, MessageImprint, TS_MESSAGE_IMPRINT),\r | |
128 | ASN1_SIMPLE (TS_TST_INFO, SerialNumber, ASN1_INTEGER),\r | |
129 | ASN1_SIMPLE (TS_TST_INFO, GenTime, ASN1_GENERALIZEDTIME),\r | |
130 | ASN1_OPT (TS_TST_INFO, Accuracy, TS_ACCURACY),\r | |
131 | ASN1_OPT (TS_TST_INFO, Ordering, ASN1_FBOOLEAN),\r | |
132 | ASN1_OPT (TS_TST_INFO, Nonce, ASN1_INTEGER),\r | |
133 | ASN1_EXP_OPT(TS_TST_INFO, Tsa, GENERAL_NAME, 0),\r | |
134 | ASN1_IMP_SEQUENCE_OF_OPT (TS_TST_INFO, Extensions, X509_EXTENSION, 1)\r | |
135 | } ASN1_SEQUENCE_END (TS_TST_INFO)\r | |
136 | IMPLEMENT_ASN1_FUNCTIONS (TS_TST_INFO)\r | |
137 | \r | |
138 | \r | |
2ac68e8b QL |
139 | /**\r |
140 | Convert ASN.1 GeneralizedTime to EFI Time.\r | |
141 | \r | |
142 | @param[in] Asn1Time Pointer to the ASN.1 GeneralizedTime to be converted.\r | |
143 | @param[out] SigningTime Return the corresponding EFI Time.\r | |
144 | \r | |
145 | @retval TRUE The time convertion succeeds.\r | |
146 | @retval FALSE Invalid parameters.\r | |
147 | \r | |
148 | **/\r | |
149 | BOOLEAN\r | |
150 | EFIAPI\r | |
151 | ConvertAsn1TimeToEfiTime (\r | |
152 | IN ASN1_TIME *Asn1Time,\r | |
153 | OUT EFI_TIME *EfiTime\r | |
154 | )\r | |
155 | {\r | |
156 | CONST CHAR8 *Str;\r | |
157 | UINTN Index;\r | |
158 | \r | |
159 | if ((Asn1Time == NULL) || (EfiTime == NULL)) {\r | |
160 | return FALSE;\r | |
161 | }\r | |
162 | \r | |
163 | Str = (CONST CHAR8*)Asn1Time->data;\r | |
164 | SetMem (EfiTime, 0, sizeof (EFI_TIME));\r | |
165 | \r | |
166 | Index = 0;\r | |
167 | if (Asn1Time->type == V_ASN1_UTCTIME) { /* two digit year */\r | |
168 | EfiTime->Year = (Str[Index++] - '0') * 10;\r | |
169 | EfiTime->Year += (Str[Index++] - '0');\r | |
170 | if (EfiTime->Year < 70) {\r | |
171 | EfiTime->Year += 100;\r | |
172 | }\r | |
173 | } else if (Asn1Time->type == V_ASN1_GENERALIZEDTIME) { /* four digit year */\r | |
174 | EfiTime->Year = (Str[Index++] - '0') * 1000;\r | |
175 | EfiTime->Year += (Str[Index++] - '0') * 100;\r | |
176 | EfiTime->Year += (Str[Index++] - '0') * 10;\r | |
177 | EfiTime->Year += (Str[Index++] - '0');\r | |
178 | if ((EfiTime->Year < 1900) || (EfiTime->Year > 9999)) {\r | |
179 | return FALSE;\r | |
180 | }\r | |
181 | }\r | |
182 | \r | |
183 | EfiTime->Month = (Str[Index++] - '0') * 10;\r | |
184 | EfiTime->Month += (Str[Index++] - '0');\r | |
185 | if ((EfiTime->Month < 1) || (EfiTime->Month > 12)) {\r | |
186 | return FALSE;\r | |
187 | }\r | |
188 | \r | |
189 | EfiTime->Day = (Str[Index++] - '0') * 10;\r | |
190 | EfiTime->Day += (Str[Index++] - '0');\r | |
191 | if ((EfiTime->Day < 1) || (EfiTime->Day > 31)) {\r | |
192 | return FALSE;\r | |
193 | }\r | |
194 | \r | |
195 | EfiTime->Hour = (Str[Index++] - '0') * 10;\r | |
196 | EfiTime->Hour += (Str[Index++] - '0');\r | |
197 | if (EfiTime->Hour > 23) {\r | |
198 | return FALSE;\r | |
199 | }\r | |
200 | \r | |
201 | EfiTime->Minute = (Str[Index++] - '0') * 10;\r | |
202 | EfiTime->Minute += (Str[Index++] - '0');\r | |
203 | if (EfiTime->Minute > 59) {\r | |
204 | return FALSE;\r | |
205 | }\r | |
206 | \r | |
207 | EfiTime->Second = (Str[Index++] - '0') * 10;\r | |
208 | EfiTime->Second += (Str[Index++] - '0');\r | |
209 | if (EfiTime->Second > 59) {\r | |
210 | return FALSE;\r | |
211 | }\r | |
212 | \r | |
213 | /* Note: we did not adjust the time based on time zone information */\r | |
214 | \r | |
215 | return TRUE;\r | |
216 | }\r | |
217 | \r | |
218 | /**\r | |
219 | \r | |
220 | Check the validity of TimeStamp Token Information.\r | |
221 | \r | |
222 | @param[in] TstInfo Pointer to the TS_TST_INFO structure.\r | |
223 | @param[in] TimestampedData Pointer to the data to be time-stamped.\r | |
224 | @param[in] DataSize Size of timestamped data in bytes.\r | |
225 | \r | |
226 | @retval TRUE The TimeStamp Token Information is valid.\r | |
227 | @retval FALSE Invalid TimeStamp Token Information.\r | |
228 | \r | |
229 | **/\r | |
230 | BOOLEAN\r | |
231 | EFIAPI\r | |
232 | CheckTSTInfo (\r | |
233 | IN CONST TS_TST_INFO *TstInfo,\r | |
234 | IN CONST UINT8 *TimestampedData,\r | |
235 | IN UINTN DataSize\r | |
236 | )\r | |
237 | {\r | |
238 | BOOLEAN Status;\r | |
239 | TS_MESSAGE_IMPRINT *Imprint;\r | |
240 | X509_ALGOR *HashAlgo;\r | |
241 | CONST EVP_MD *Md;\r | |
f56b11d2 | 242 | EVP_MD_CTX *MdCtx;\r |
2ac68e8b QL |
243 | UINTN MdSize;\r |
244 | UINT8 *HashedMsg;\r | |
245 | \r | |
246 | //\r | |
247 | // Initialization\r | |
248 | //\r | |
249 | Status = FALSE;\r | |
250 | HashAlgo = NULL;\r | |
251 | HashedMsg = NULL;\r | |
f56b11d2 | 252 | MdCtx = NULL;\r |
2ac68e8b QL |
253 | \r |
254 | //\r | |
255 | // -- Check version number of Timestamp:\r | |
256 | // The version field (currently v1) describes the version of the time-stamp token.\r | |
257 | // Conforming time-stamping servers MUST be able to provide version 1 time-stamp tokens.\r | |
258 | //\r | |
259 | if ((ASN1_INTEGER_get (TstInfo->Version)) != 1) {\r | |
260 | return FALSE;\r | |
261 | }\r | |
262 | \r | |
263 | //\r | |
264 | // -- Check Policies\r | |
265 | // The policy field MUST indicate the TSA's policy under which the response was produced.\r | |
266 | //\r | |
267 | if (TstInfo->Policy == NULL) {\r | |
268 | /// NOTE: Need to check if the requested and returned policies.\r | |
269 | /// We have no information about the Requested TSA Policy.\r | |
270 | return FALSE;\r | |
271 | }\r | |
272 | \r | |
273 | //\r | |
274 | // -- Compute & Check Message Imprint\r | |
275 | //\r | |
276 | Imprint = TstInfo->MessageImprint;\r | |
277 | HashAlgo = X509_ALGOR_dup (Imprint->HashAlgorithm);\r | |
278 | \r | |
279 | Md = EVP_get_digestbyobj (HashAlgo->algorithm);\r | |
280 | if (Md == NULL) {\r | |
281 | goto _Exit;\r | |
282 | }\r | |
283 | \r | |
284 | MdSize = EVP_MD_size (Md);\r | |
285 | HashedMsg = AllocateZeroPool (MdSize);\r | |
286 | if (HashedMsg == NULL) {\r | |
287 | goto _Exit;\r | |
288 | }\r | |
f56b11d2 QL |
289 | MdCtx = EVP_MD_CTX_new ();\r |
290 | if (MdCtx == NULL) {\r | |
291 | goto _Exit;\r | |
292 | }\r | |
293 | if ((EVP_DigestInit_ex (MdCtx, Md, NULL) != 1) ||\r | |
294 | (EVP_DigestUpdate (MdCtx, TimestampedData, DataSize) != 1) ||\r | |
295 | (EVP_DigestFinal (MdCtx, HashedMsg, NULL) != 1)) {\r | |
296 | goto _Exit;\r | |
297 | }\r | |
2ac68e8b | 298 | if ((MdSize == (UINTN)ASN1_STRING_length (Imprint->HashedMessage)) &&\r |
f56b11d2 | 299 | (CompareMem (HashedMsg, ASN1_STRING_get0_data (Imprint->HashedMessage), MdSize) != 0)) {\r |
2ac68e8b QL |
300 | goto _Exit;\r |
301 | }\r | |
302 | \r | |
303 | //\r | |
304 | // -- Check Nonces\r | |
305 | //\r | |
306 | if (TstInfo->Nonce != NULL) {\r | |
307 | //\r | |
308 | // Nonces is optional, No error if no nonce is returned;\r | |
309 | //\r | |
310 | }\r | |
311 | \r | |
312 | //\r | |
313 | // -- Check if the TSA name and signer certificate is matched.\r | |
314 | //\r | |
315 | if (TstInfo->Tsa != NULL) {\r | |
316 | //\r | |
317 | // Ignored the optional Tsa field checking.\r | |
318 | //\r | |
319 | }\r | |
320 | \r | |
321 | Status = TRUE;\r | |
322 | \r | |
323 | _Exit:\r | |
324 | X509_ALGOR_free (HashAlgo);\r | |
f56b11d2 | 325 | EVP_MD_CTX_free (MdCtx);\r |
2ac68e8b QL |
326 | if (HashedMsg != NULL) {\r |
327 | FreePool (HashedMsg);\r | |
328 | }\r | |
329 | \r | |
330 | return Status;\r | |
331 | }\r | |
332 | \r | |
333 | /**\r | |
2998af86 | 334 | Verifies the validity of a TimeStamp Token as described in RFC 3161 ("Internet\r |
2ac68e8b QL |
335 | X.509 Public Key Infrastructure Time-Stamp Protocol (TSP)").\r |
336 | \r | |
337 | If TSToken is NULL, then return FALSE.\r | |
338 | If TimestampedData is NULL, then return FALSE.\r | |
339 | \r | |
340 | @param[in] TSToken Pointer to the RFC3161 TimeStamp Token, which is generated\r | |
341 | by a TSA and located in the software publisher's SignerInfo\r | |
342 | structure.\r | |
343 | @param[in] TokenSize Size of the TimeStamp Token in bytes.\r | |
344 | @param[in] TsaCert Pointer to a trusted/root TSA certificate encoded in DER.\r | |
345 | @param[in] CertSize Size of the trusted TSA certificate in bytes.\r | |
346 | @param[in] TimestampedData Pointer to the data to be time-stamped.\r | |
347 | @param[in] DataSize Size of timestamped data in bytes.\r | |
348 | @param[out] SigningTime Return the time of timestamp generation time if the timestamp\r | |
349 | signature is valid.\r | |
350 | \r | |
351 | @retval TRUE The specified timestamp token is valid.\r | |
352 | @retval FALSE Invalid timestamp token.\r | |
353 | \r | |
354 | **/\r | |
355 | BOOLEAN\r | |
356 | EFIAPI\r | |
357 | TimestampTokenVerify (\r | |
358 | IN CONST UINT8 *TSToken,\r | |
359 | IN UINTN TokenSize,\r | |
360 | IN CONST UINT8 *TsaCert,\r | |
361 | IN UINTN CertSize,\r | |
362 | IN CONST UINT8 *TimestampedData,\r | |
363 | IN UINTN DataSize,\r | |
364 | OUT EFI_TIME *SigningTime\r | |
365 | )\r | |
366 | {\r | |
367 | BOOLEAN Status;\r | |
368 | CONST UINT8 *TokenTemp;\r | |
369 | PKCS7 *Pkcs7;\r | |
370 | X509 *Cert;\r | |
1463ce18 | 371 | CONST UINT8 *CertTemp;\r |
2ac68e8b QL |
372 | X509_STORE *CertStore;\r |
373 | BIO *OutBio;\r | |
374 | UINT8 *TstData;\r | |
375 | UINTN TstSize;\r | |
1463ce18 | 376 | CONST UINT8 *TstTemp;\r |
2ac68e8b QL |
377 | TS_TST_INFO *TstInfo;\r |
378 | \r | |
379 | Status = FALSE;\r | |
380 | \r | |
381 | //\r | |
382 | // Check input parameters\r | |
383 | //\r | |
384 | if ((TSToken == NULL) || (TsaCert == NULL) || (TimestampedData == NULL) ||\r | |
385 | (TokenSize > INT_MAX) || (CertSize > INT_MAX) || (DataSize > INT_MAX)) {\r | |
386 | return FALSE;\r | |
387 | }\r | |
388 | \r | |
389 | //\r | |
390 | // Initializations\r | |
391 | //\r | |
392 | if (SigningTime != NULL) {\r | |
393 | SetMem (SigningTime, sizeof (EFI_TIME), 0);\r | |
394 | }\r | |
395 | Pkcs7 = NULL;\r | |
396 | Cert = NULL;\r | |
397 | CertStore = NULL;\r | |
398 | OutBio = NULL;\r | |
399 | TstData = NULL;\r | |
400 | TstInfo = NULL;\r | |
401 | \r | |
402 | //\r | |
403 | // TimeStamp Token should contain one valid DER-encoded ASN.1 PKCS#7 structure.\r | |
404 | //\r | |
405 | TokenTemp = TSToken;\r | |
406 | Pkcs7 = d2i_PKCS7 (NULL, (const unsigned char **) &TokenTemp, (int) TokenSize);\r | |
407 | if (Pkcs7 == NULL) {\r | |
408 | goto _Exit;\r | |
409 | }\r | |
410 | \r | |
411 | //\r | |
412 | // The timestamp signature (TSA's response) will be one PKCS#7 signed data.\r | |
413 | //\r | |
414 | if (!PKCS7_type_is_signed (Pkcs7)) {\r | |
415 | goto _Exit;\r | |
416 | }\r | |
417 | \r | |
418 | //\r | |
419 | // Read the trusted TSA certificate (DER-encoded), and Construct X509 Certificate.\r | |
420 | //\r | |
1463ce18 QL |
421 | CertTemp = TsaCert;\r |
422 | Cert = d2i_X509 (NULL, &CertTemp, (long) CertSize);\r | |
2ac68e8b QL |
423 | if (Cert == NULL) {\r |
424 | goto _Exit;\r | |
425 | }\r | |
426 | \r | |
427 | //\r | |
428 | // Setup X509 Store for trusted certificate.\r | |
429 | //\r | |
430 | CertStore = X509_STORE_new ();\r | |
431 | if ((CertStore == NULL) || !(X509_STORE_add_cert (CertStore, Cert))) {\r | |
432 | goto _Exit;\r | |
433 | }\r | |
434 | \r | |
435 | //\r | |
68547181 | 436 | // Allow partial certificate chains, terminated by a non-self-signed but\r |
de0408be | 437 | // still trusted intermediate certificate. Also disable time checks.\r |
2ac68e8b | 438 | //\r |
de0408be DW |
439 | X509_STORE_set_flags (CertStore,\r |
440 | X509_V_FLAG_PARTIAL_CHAIN | X509_V_FLAG_NO_CHECK_TIME);\r | |
2ac68e8b QL |
441 | \r |
442 | X509_STORE_set_purpose (CertStore, X509_PURPOSE_ANY);\r | |
443 | \r | |
444 | //\r | |
445 | // Verifies the PKCS#7 signedData structure, and output the signed contents.\r | |
446 | //\r | |
447 | OutBio = BIO_new (BIO_s_mem ());\r | |
448 | if (OutBio == NULL) {\r | |
449 | goto _Exit;\r | |
450 | }\r | |
451 | if (!PKCS7_verify (Pkcs7, NULL, CertStore, NULL, OutBio, PKCS7_BINARY)) {\r | |
452 | goto _Exit;\r | |
453 | }\r | |
454 | \r | |
455 | //\r | |
456 | // Read the signed contents detached in timestamp signature.\r | |
457 | //\r | |
458 | TstData = AllocateZeroPool (2048);\r | |
459 | if (TstData == NULL) {\r | |
460 | goto _Exit;\r | |
461 | }\r | |
462 | TstSize = BIO_read (OutBio, (void *) TstData, 2048);\r | |
463 | \r | |
464 | //\r | |
465 | // Construct TS_TST_INFO structure from the signed contents.\r | |
466 | //\r | |
467 | TstTemp = TstData;\r | |
017c285e LE |
468 | TstInfo = d2i_TS_TST_INFO (NULL, (const unsigned char **) &TstTemp,\r |
469 | (int)TstSize);\r | |
2ac68e8b QL |
470 | if (TstInfo == NULL) {\r |
471 | goto _Exit;\r | |
472 | }\r | |
473 | \r | |
474 | //\r | |
475 | // Check TS_TST_INFO structure.\r | |
476 | //\r | |
477 | Status = CheckTSTInfo (TstInfo, TimestampedData, DataSize);\r | |
478 | if (!Status) {\r | |
479 | goto _Exit;\r | |
480 | }\r | |
481 | \r | |
482 | //\r | |
483 | // Retrieve the signing time from TS_TST_INFO structure.\r | |
484 | //\r | |
485 | if (SigningTime != NULL) {\r | |
486 | SetMem (SigningTime, sizeof (EFI_TIME), 0);\r | |
487 | Status = ConvertAsn1TimeToEfiTime (TstInfo->GenTime, SigningTime);\r | |
488 | }\r | |
489 | \r | |
490 | _Exit:\r | |
491 | //\r | |
492 | // Release Resources\r | |
493 | //\r | |
494 | PKCS7_free (Pkcs7);\r | |
495 | X509_free (Cert);\r | |
496 | X509_STORE_free (CertStore);\r | |
497 | BIO_free (OutBio);\r | |
498 | TS_TST_INFO_free (TstInfo);\r | |
499 | \r | |
500 | if (TstData != NULL) {\r | |
501 | FreePool (TstData);\r | |
502 | }\r | |
503 | \r | |
504 | return Status;\r | |
505 | }\r | |
506 | \r | |
507 | /**\r | |
2998af86 | 508 | Verifies the validity of a RFC3161 Timestamp CounterSignature embedded in PE/COFF Authenticode\r |
2ac68e8b QL |
509 | signature.\r |
510 | \r | |
511 | If AuthData is NULL, then return FALSE.\r | |
512 | \r | |
513 | @param[in] AuthData Pointer to the Authenticode Signature retrieved from signed\r | |
514 | PE/COFF image to be verified.\r | |
515 | @param[in] DataSize Size of the Authenticode Signature in bytes.\r | |
516 | @param[in] TsaCert Pointer to a trusted/root TSA certificate encoded in DER, which\r | |
517 | is used for TSA certificate chain verification.\r | |
518 | @param[in] CertSize Size of the trusted certificate in bytes.\r | |
519 | @param[out] SigningTime Return the time of timestamp generation time if the timestamp\r | |
520 | signature is valid.\r | |
521 | \r | |
522 | @retval TRUE The specified Authenticode includes a valid RFC3161 Timestamp CounterSignature.\r | |
523 | @retval FALSE No valid RFC3161 Timestamp CounterSignature in the specified Authenticode data.\r | |
524 | \r | |
525 | **/\r | |
526 | BOOLEAN\r | |
527 | EFIAPI\r | |
528 | ImageTimestampVerify (\r | |
529 | IN CONST UINT8 *AuthData,\r | |
530 | IN UINTN DataSize,\r | |
531 | IN CONST UINT8 *TsaCert,\r | |
532 | IN UINTN CertSize,\r | |
533 | OUT EFI_TIME *SigningTime\r | |
534 | )\r | |
535 | {\r | |
536 | BOOLEAN Status;\r | |
537 | PKCS7 *Pkcs7;\r | |
1463ce18 | 538 | CONST UINT8 *Temp;\r |
2ac68e8b QL |
539 | STACK_OF(PKCS7_SIGNER_INFO) *SignerInfos;\r |
540 | PKCS7_SIGNER_INFO *SignInfo;\r | |
541 | UINTN Index;\r | |
542 | STACK_OF(X509_ATTRIBUTE) *Sk;\r | |
543 | X509_ATTRIBUTE *Xa;\r | |
4ffe0fac | 544 | ASN1_OBJECT *XaObj;\r |
2ac68e8b QL |
545 | ASN1_TYPE *Asn1Type;\r |
546 | ASN1_OCTET_STRING *EncDigest;\r | |
547 | UINT8 *TSToken;\r | |
548 | UINTN TokenSize;\r | |
549 | \r | |
550 | //\r | |
551 | // Input Parameters Checking.\r | |
552 | //\r | |
553 | if ((AuthData == NULL) || (TsaCert == NULL)) {\r | |
554 | return FALSE;\r | |
555 | }\r | |
556 | \r | |
557 | if ((DataSize > INT_MAX) || (CertSize > INT_MAX)) {\r | |
558 | return FALSE;\r | |
559 | }\r | |
560 | \r | |
561 | //\r | |
562 | // Register & Initialize necessary digest algorithms for PKCS#7 Handling.\r | |
563 | //\r | |
564 | if ((EVP_add_digest (EVP_md5 ()) == 0) || (EVP_add_digest (EVP_sha1 ()) == 0) ||\r | |
565 | (EVP_add_digest (EVP_sha256 ()) == 0) || (EVP_add_digest_alias (SN_sha1WithRSAEncryption, SN_sha1WithRSA)) == 0) {\r | |
566 | return FALSE;\r | |
567 | }\r | |
568 | \r | |
569 | //\r | |
570 | // Initialization.\r | |
571 | //\r | |
572 | Status = FALSE;\r | |
573 | Pkcs7 = NULL;\r | |
574 | SignInfo = NULL;\r | |
575 | \r | |
576 | //\r | |
577 | // Decode ASN.1-encoded Authenticode data into PKCS7 structure.\r | |
578 | //\r | |
1463ce18 QL |
579 | Temp = AuthData;\r |
580 | Pkcs7 = d2i_PKCS7 (NULL, (const unsigned char **) &Temp, (int) DataSize);\r | |
2ac68e8b QL |
581 | if (Pkcs7 == NULL) {\r |
582 | goto _Exit;\r | |
583 | }\r | |
584 | \r | |
585 | //\r | |
586 | // Check if there is one and only one signer.\r | |
587 | //\r | |
588 | SignerInfos = PKCS7_get_signer_info (Pkcs7);\r | |
589 | if (!SignerInfos || (sk_PKCS7_SIGNER_INFO_num (SignerInfos) != 1)) {\r | |
590 | goto _Exit;\r | |
591 | }\r | |
592 | \r | |
593 | //\r | |
594 | // Locate the TimeStamp CounterSignature.\r | |
595 | //\r | |
596 | SignInfo = sk_PKCS7_SIGNER_INFO_value (SignerInfos, 0);\r | |
597 | if (SignInfo == NULL) {\r | |
598 | goto _Exit;\r | |
599 | }\r | |
600 | \r | |
601 | //\r | |
602 | // Locate Message Digest which will be the data to be time-stamped.\r | |
603 | //\r | |
604 | EncDigest = SignInfo->enc_digest;\r | |
605 | if (EncDigest == NULL) {\r | |
606 | goto _Exit;\r | |
607 | }\r | |
608 | \r | |
609 | //\r | |
610 | // The RFC3161 timestamp counterSignature is contained in unauthenticatedAttributes field\r | |
611 | // of SignerInfo.\r | |
612 | //\r | |
613 | Sk = SignInfo->unauth_attr;\r | |
614 | if (Sk == NULL) { // No timestamp counterSignature.\r | |
615 | goto _Exit;\r | |
616 | }\r | |
617 | \r | |
618 | Asn1Type = NULL;\r | |
619 | for (Index = 0; Index < (UINTN) sk_X509_ATTRIBUTE_num (Sk); Index++) {\r | |
620 | //\r | |
621 | // Search valid RFC3161 timestamp counterSignature based on OBJID.\r | |
622 | //\r | |
623 | Xa = sk_X509_ATTRIBUTE_value (Sk, (int)Index);\r | |
4ffe0fac | 624 | if (Xa == NULL) {\r |
2ac68e8b QL |
625 | continue;\r |
626 | }\r | |
4ffe0fac DW |
627 | XaObj = X509_ATTRIBUTE_get0_object(Xa);\r |
628 | if (XaObj == NULL) {\r | |
629 | continue;\r | |
630 | }\r | |
338bfd97 DW |
631 | if ((OBJ_length(XaObj) != sizeof (mSpcRFC3161OidValue)) ||\r |
632 | (CompareMem (OBJ_get0_data(XaObj), mSpcRFC3161OidValue, sizeof (mSpcRFC3161OidValue)) != 0)) {\r | |
4ffe0fac DW |
633 | continue;\r |
634 | }\r | |
635 | Asn1Type = X509_ATTRIBUTE_get0_type(Xa, 0);\r | |
2ac68e8b QL |
636 | }\r |
637 | \r | |
638 | if (Asn1Type == NULL) {\r | |
639 | Status = FALSE;\r | |
640 | goto _Exit;\r | |
641 | }\r | |
642 | TSToken = Asn1Type->value.octet_string->data;\r | |
643 | TokenSize = Asn1Type->value.octet_string->length;\r | |
644 | \r | |
645 | //\r | |
646 | // TimeStamp counterSignature (Token) verification.\r | |
647 | //\r | |
648 | Status = TimestampTokenVerify (\r | |
649 | TSToken,\r | |
650 | TokenSize,\r | |
651 | TsaCert,\r | |
652 | CertSize,\r | |
653 | EncDigest->data,\r | |
654 | EncDigest->length,\r | |
655 | SigningTime\r | |
656 | );\r | |
657 | \r | |
658 | _Exit:\r | |
659 | //\r | |
660 | // Release Resources\r | |
661 | //\r | |
662 | PKCS7_free (Pkcs7);\r | |
663 | \r | |
664 | return Status;\r | |
665 | }\r |