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c1d93242 | 1 | /** @file\r |
07309c3d | 2 | This library is BaseCrypto router. It will redirect hash request to each individual\r |
c1d93242 JY |
3 | hash handler registerd, such as SHA1, SHA256.\r |
4 | Platform can use PcdTpm2HashMask to mask some hash engines.\r | |
5 | \r | |
9fe9cf9a | 6 | Copyright (c) 2013 - 2017, Intel Corporation. All rights reserved. <BR>\r |
c1d93242 JY |
7 | This program and the accompanying materials\r |
8 | are licensed and made available under the terms and conditions of the BSD License\r | |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #include <PiPei.h>\r | |
18 | #include <Library/BaseLib.h>\r | |
19 | #include <Library/BaseMemoryLib.h>\r | |
20 | #include <Library/Tpm2CommandLib.h>\r | |
21 | #include <Library/DebugLib.h>\r | |
22 | #include <Library/MemoryAllocationLib.h>\r | |
23 | #include <Library/PcdLib.h>\r | |
24 | #include <Library/HashLib.h>\r | |
25 | \r | |
26 | #include "HashLibBaseCryptoRouterCommon.h"\r | |
27 | \r | |
859b0db4 | 28 | HASH_INTERFACE mHashInterface[HASH_COUNT] = {{{0}, NULL, NULL, NULL}};\r |
c1d93242 JY |
29 | UINTN mHashInterfaceCount = 0;\r |
30 | \r | |
9fe9cf9a SZ |
31 | UINT32 mSupportedHashMaskLast = 0;\r |
32 | UINT32 mSupportedHashMaskCurrent = 0;\r | |
33 | \r | |
34 | /**\r | |
35 | Check mismatch of supported HashMask between modules\r | |
36 | that may link different HashInstanceLib instances.\r | |
37 | \r | |
38 | **/\r | |
39 | VOID\r | |
40 | CheckSupportedHashMaskMismatch (\r | |
41 | VOID\r | |
42 | )\r | |
43 | {\r | |
44 | if (mSupportedHashMaskCurrent != mSupportedHashMaskLast) {\r | |
45 | DEBUG ((\r | |
46 | DEBUG_WARN,\r | |
47 | "WARNING: There is mismatch of supported HashMask (0x%x - 0x%x) between modules\n",\r | |
48 | mSupportedHashMaskCurrent,\r | |
49 | mSupportedHashMaskLast\r | |
50 | ));\r | |
51 | DEBUG ((DEBUG_WARN, "that are linking different HashInstanceLib instances!\n"));\r | |
52 | }\r | |
53 | }\r | |
54 | \r | |
c1d93242 JY |
55 | /**\r |
56 | Start hash sequence.\r | |
57 | \r | |
58 | @param HashHandle Hash handle.\r | |
59 | \r | |
60 | @retval EFI_SUCCESS Hash sequence start and HandleHandle returned.\r | |
61 | @retval EFI_OUT_OF_RESOURCES No enough resource to start hash.\r | |
62 | **/\r | |
63 | EFI_STATUS\r | |
64 | EFIAPI\r | |
65 | HashStart (\r | |
66 | OUT HASH_HANDLE *HashHandle\r | |
67 | )\r | |
68 | {\r | |
69 | HASH_HANDLE *HashCtx;\r | |
70 | UINTN Index;\r | |
1abfa4ce | 71 | UINT32 HashMask;\r |
c1d93242 JY |
72 | \r |
73 | if (mHashInterfaceCount == 0) {\r | |
74 | return EFI_UNSUPPORTED;\r | |
75 | }\r | |
76 | \r | |
9fe9cf9a SZ |
77 | CheckSupportedHashMaskMismatch ();\r |
78 | \r | |
c1d93242 JY |
79 | HashCtx = AllocatePool (sizeof(*HashCtx) * mHashInterfaceCount);\r |
80 | ASSERT (HashCtx != NULL);\r | |
81 | \r | |
82 | for (Index = 0; Index < mHashInterfaceCount; Index++) {\r | |
1abfa4ce JY |
83 | HashMask = Tpm2GetHashMaskFromAlgo (&mHashInterface[Index].HashGuid);\r |
84 | if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r | |
85 | mHashInterface[Index].HashInit (&HashCtx[Index]);\r | |
86 | }\r | |
c1d93242 JY |
87 | }\r |
88 | \r | |
89 | *HashHandle = (HASH_HANDLE)HashCtx;\r | |
90 | \r | |
91 | return EFI_SUCCESS;\r | |
92 | }\r | |
93 | \r | |
94 | /**\r | |
95 | Update hash sequence data.\r | |
96 | \r | |
97 | @param HashHandle Hash handle.\r | |
98 | @param DataToHash Data to be hashed.\r | |
99 | @param DataToHashLen Data size.\r | |
100 | \r | |
101 | @retval EFI_SUCCESS Hash sequence updated.\r | |
102 | **/\r | |
103 | EFI_STATUS\r | |
104 | EFIAPI\r | |
105 | HashUpdate (\r | |
106 | IN HASH_HANDLE HashHandle,\r | |
107 | IN VOID *DataToHash,\r | |
108 | IN UINTN DataToHashLen\r | |
109 | )\r | |
110 | {\r | |
111 | HASH_HANDLE *HashCtx;\r | |
112 | UINTN Index;\r | |
1abfa4ce | 113 | UINT32 HashMask;\r |
c1d93242 JY |
114 | \r |
115 | if (mHashInterfaceCount == 0) {\r | |
116 | return EFI_UNSUPPORTED;\r | |
117 | }\r | |
118 | \r | |
9fe9cf9a SZ |
119 | CheckSupportedHashMaskMismatch ();\r |
120 | \r | |
c1d93242 JY |
121 | HashCtx = (HASH_HANDLE *)HashHandle;\r |
122 | \r | |
123 | for (Index = 0; Index < mHashInterfaceCount; Index++) {\r | |
1abfa4ce JY |
124 | HashMask = Tpm2GetHashMaskFromAlgo (&mHashInterface[Index].HashGuid);\r |
125 | if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r | |
126 | mHashInterface[Index].HashUpdate (HashCtx[Index], DataToHash, DataToHashLen);\r | |
127 | }\r | |
c1d93242 JY |
128 | }\r |
129 | \r | |
130 | return EFI_SUCCESS;\r | |
131 | }\r | |
132 | \r | |
133 | /**\r | |
134 | Hash sequence complete and extend to PCR.\r | |
135 | \r | |
136 | @param HashHandle Hash handle.\r | |
137 | @param PcrIndex PCR to be extended.\r | |
138 | @param DataToHash Data to be hashed.\r | |
139 | @param DataToHashLen Data size.\r | |
140 | @param DigestList Digest list.\r | |
141 | \r | |
142 | @retval EFI_SUCCESS Hash sequence complete and DigestList is returned.\r | |
143 | **/\r | |
144 | EFI_STATUS\r | |
145 | EFIAPI\r | |
146 | HashCompleteAndExtend (\r | |
147 | IN HASH_HANDLE HashHandle,\r | |
148 | IN TPMI_DH_PCR PcrIndex,\r | |
149 | IN VOID *DataToHash,\r | |
150 | IN UINTN DataToHashLen,\r | |
151 | OUT TPML_DIGEST_VALUES *DigestList\r | |
152 | )\r | |
153 | {\r | |
154 | TPML_DIGEST_VALUES Digest;\r | |
155 | HASH_HANDLE *HashCtx;\r | |
156 | UINTN Index;\r | |
157 | EFI_STATUS Status;\r | |
1abfa4ce | 158 | UINT32 HashMask;\r |
c1d93242 JY |
159 | \r |
160 | if (mHashInterfaceCount == 0) {\r | |
161 | return EFI_UNSUPPORTED;\r | |
162 | }\r | |
163 | \r | |
9fe9cf9a SZ |
164 | CheckSupportedHashMaskMismatch ();\r |
165 | \r | |
c1d93242 JY |
166 | HashCtx = (HASH_HANDLE *)HashHandle;\r |
167 | ZeroMem (DigestList, sizeof(*DigestList));\r | |
168 | \r | |
169 | for (Index = 0; Index < mHashInterfaceCount; Index++) {\r | |
1abfa4ce JY |
170 | HashMask = Tpm2GetHashMaskFromAlgo (&mHashInterface[Index].HashGuid);\r |
171 | if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r | |
172 | mHashInterface[Index].HashUpdate (HashCtx[Index], DataToHash, DataToHashLen);\r | |
173 | mHashInterface[Index].HashFinal (HashCtx[Index], &Digest);\r | |
174 | Tpm2SetHashToDigestList (DigestList, &Digest);\r | |
175 | }\r | |
c1d93242 JY |
176 | }\r |
177 | \r | |
178 | FreePool (HashCtx);\r | |
179 | \r | |
180 | Status = Tpm2PcrExtend (\r | |
181 | PcrIndex,\r | |
182 | DigestList\r | |
183 | );\r | |
184 | return Status;\r | |
185 | }\r | |
186 | \r | |
187 | /**\r | |
188 | Hash data and extend to PCR.\r | |
189 | \r | |
190 | @param PcrIndex PCR to be extended.\r | |
191 | @param DataToHash Data to be hashed.\r | |
192 | @param DataToHashLen Data size.\r | |
193 | @param DigestList Digest list.\r | |
194 | \r | |
195 | @retval EFI_SUCCESS Hash data and DigestList is returned.\r | |
196 | **/\r | |
197 | EFI_STATUS\r | |
198 | EFIAPI\r | |
199 | HashAndExtend (\r | |
200 | IN TPMI_DH_PCR PcrIndex,\r | |
201 | IN VOID *DataToHash,\r | |
202 | IN UINTN DataToHashLen,\r | |
203 | OUT TPML_DIGEST_VALUES *DigestList\r | |
204 | )\r | |
205 | {\r | |
206 | HASH_HANDLE HashHandle;\r | |
207 | EFI_STATUS Status;\r | |
208 | \r | |
209 | if (mHashInterfaceCount == 0) {\r | |
210 | return EFI_UNSUPPORTED;\r | |
211 | }\r | |
212 | \r | |
9fe9cf9a SZ |
213 | CheckSupportedHashMaskMismatch ();\r |
214 | \r | |
c1d93242 JY |
215 | HashStart (&HashHandle);\r |
216 | HashUpdate (HashHandle, DataToHash, DataToHashLen);\r | |
217 | Status = HashCompleteAndExtend (HashHandle, PcrIndex, NULL, 0, DigestList);\r | |
218 | \r | |
219 | return Status;\r | |
220 | }\r | |
221 | \r | |
222 | /**\r | |
223 | This service register Hash.\r | |
224 | \r | |
225 | @param HashInterface Hash interface\r | |
226 | \r | |
227 | @retval EFI_SUCCESS This hash interface is registered successfully.\r | |
228 | @retval EFI_UNSUPPORTED System does not support register this interface.\r | |
229 | @retval EFI_ALREADY_STARTED System already register this interface.\r | |
230 | **/\r | |
231 | EFI_STATUS\r | |
232 | EFIAPI\r | |
233 | RegisterHashInterfaceLib (\r | |
234 | IN HASH_INTERFACE *HashInterface\r | |
235 | )\r | |
236 | {\r | |
237 | UINTN Index;\r | |
238 | UINT32 HashMask;\r | |
fe3ca12d | 239 | EFI_STATUS Status;\r |
c1d93242 JY |
240 | \r |
241 | //\r | |
242 | // Check allow\r | |
243 | //\r | |
244 | HashMask = Tpm2GetHashMaskFromAlgo (&HashInterface->HashGuid);\r | |
245 | if ((HashMask & PcdGet32 (PcdTpm2HashMask)) == 0) {\r | |
246 | return EFI_UNSUPPORTED;\r | |
247 | }\r | |
248 | \r | |
249 | if (mHashInterfaceCount >= sizeof(mHashInterface)/sizeof(mHashInterface[0])) {\r | |
250 | return EFI_OUT_OF_RESOURCES;\r | |
251 | }\r | |
252 | \r | |
253 | //\r | |
254 | // Check duplication\r | |
255 | //\r | |
256 | for (Index = 0; Index < mHashInterfaceCount; Index++) {\r | |
257 | if (CompareGuid (&mHashInterface[Index].HashGuid, &HashInterface->HashGuid)) {\r | |
9fe9cf9a | 258 | DEBUG ((DEBUG_ERROR, "Hash Interface (%g) has been registered\n", &HashInterface->HashGuid));\r |
c1d93242 JY |
259 | return EFI_ALREADY_STARTED;\r |
260 | }\r | |
261 | }\r | |
262 | \r | |
9fe9cf9a SZ |
263 | //\r |
264 | // Record hash algorithm bitmap of CURRENT module which consumes HashLib.\r | |
265 | //\r | |
266 | mSupportedHashMaskCurrent = PcdGet32 (PcdTcg2HashAlgorithmBitmap) | HashMask;\r | |
267 | Status = PcdSet32S (PcdTcg2HashAlgorithmBitmap, mSupportedHashMaskCurrent);\r | |
268 | ASSERT_EFI_ERROR (Status);\r | |
269 | \r | |
c1d93242 JY |
270 | CopyMem (&mHashInterface[mHashInterfaceCount], HashInterface, sizeof(*HashInterface));\r |
271 | mHashInterfaceCount ++;\r | |
272 | \r | |
273 | return EFI_SUCCESS;\r | |
9fe9cf9a SZ |
274 | }\r |
275 | \r | |
276 | /**\r | |
277 | The constructor function of HashLibBaseCryptoRouterDxe.\r | |
278 | \r | |
279 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
280 | @param SystemTable A pointer to the EFI System Table.\r | |
281 | \r | |
282 | @retval EFI_SUCCESS The constructor executed correctly.\r | |
283 | \r | |
284 | **/\r | |
285 | EFI_STATUS\r | |
286 | EFIAPI\r | |
287 | HashLibBaseCryptoRouterDxeConstructor (\r | |
288 | IN EFI_HANDLE ImageHandle,\r | |
289 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
290 | )\r | |
291 | {\r | |
292 | EFI_STATUS Status;\r | |
293 | \r | |
294 | //\r | |
295 | // Record hash algorithm bitmap of LAST module which also consumes HashLib.\r | |
296 | //\r | |
297 | mSupportedHashMaskLast = PcdGet32 (PcdTcg2HashAlgorithmBitmap);\r | |
298 | \r | |
299 | //\r | |
300 | // Set PcdTcg2HashAlgorithmBitmap to 0 in CONSTRUCTOR for CURRENT module.\r | |
301 | //\r | |
302 | Status = PcdSet32S (PcdTcg2HashAlgorithmBitmap, 0);\r | |
303 | ASSERT_EFI_ERROR (Status);\r | |
304 | \r | |
305 | return EFI_SUCCESS;\r | |
306 | }\r |