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c1d93242 JY |
1 | /** @file\r |
2 | Ihis library is BaseCrypto router. It will redirect hash request to each individual\r | |
3 | hash handler registerd, such as SHA1, SHA256.\r | |
4 | Platform can use PcdTpm2HashMask to mask some hash engines.\r | |
5 | \r | |
33985e3b | 6 | Copyright (c) 2013 - 2014, 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/HobLib.h>\r | |
25 | #include <Library/HashLib.h>\r | |
26 | \r | |
27 | #include "HashLibBaseCryptoRouterCommon.h"\r | |
28 | \r | |
29 | #define HASH_LIB_PEI_ROUTER_GUID \\r | |
30 | { 0x84681c08, 0x6873, 0x46f3, { 0x8b, 0xb7, 0xab, 0x66, 0x18, 0x95, 0xa1, 0xb3 } }\r | |
31 | \r | |
32 | EFI_GUID mHashLibPeiRouterGuid = HASH_LIB_PEI_ROUTER_GUID;\r | |
33 | \r | |
34 | typedef struct {\r | |
35 | UINTN HashInterfaceCount;\r | |
36 | HASH_INTERFACE HashInterface[HASH_COUNT];\r | |
37 | } HASH_INTERFACE_HOB;\r | |
38 | \r | |
39 | /**\r | |
40 | This function get hash interface.\r | |
41 | \r | |
42 | @retval hash interface.\r | |
43 | **/\r | |
44 | HASH_INTERFACE_HOB *\r | |
45 | InternalGetHashInterface (\r | |
46 | VOID\r | |
47 | )\r | |
48 | {\r | |
49 | EFI_HOB_GUID_TYPE *Hob;\r | |
50 | \r | |
51 | Hob = GetFirstGuidHob (&mHashLibPeiRouterGuid);\r | |
52 | if (Hob == NULL) {\r | |
53 | return NULL;\r | |
54 | }\r | |
55 | return (HASH_INTERFACE_HOB *)(Hob + 1);\r | |
56 | }\r | |
57 | \r | |
58 | /**\r | |
59 | Start hash sequence.\r | |
60 | \r | |
61 | @param HashHandle Hash handle.\r | |
62 | \r | |
63 | @retval EFI_SUCCESS Hash sequence start and HandleHandle returned.\r | |
64 | @retval EFI_OUT_OF_RESOURCES No enough resource to start hash.\r | |
65 | **/\r | |
66 | EFI_STATUS\r | |
67 | EFIAPI\r | |
68 | HashStart (\r | |
69 | OUT HASH_HANDLE *HashHandle\r | |
70 | )\r | |
71 | {\r | |
72 | HASH_INTERFACE_HOB *HashInterfaceHob;\r | |
73 | HASH_HANDLE *HashCtx;\r | |
74 | UINTN Index;\r | |
75 | \r | |
76 | HashInterfaceHob = InternalGetHashInterface ();\r | |
77 | if (HashInterfaceHob == NULL) {\r | |
78 | return EFI_UNSUPPORTED;\r | |
79 | }\r | |
80 | \r | |
81 | if (HashInterfaceHob->HashInterfaceCount == 0) {\r | |
82 | return EFI_UNSUPPORTED;\r | |
83 | }\r | |
84 | \r | |
85 | HashCtx = AllocatePool (sizeof(*HashCtx) * HashInterfaceHob->HashInterfaceCount);\r | |
86 | ASSERT (HashCtx != NULL);\r | |
87 | \r | |
88 | for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r | |
89 | HashInterfaceHob->HashInterface[Index].HashInit (&HashCtx[Index]);\r | |
90 | }\r | |
91 | \r | |
92 | *HashHandle = (HASH_HANDLE)HashCtx;\r | |
93 | \r | |
94 | return EFI_SUCCESS;\r | |
95 | }\r | |
96 | \r | |
97 | /**\r | |
98 | Update hash sequence data.\r | |
99 | \r | |
100 | @param HashHandle Hash handle.\r | |
101 | @param DataToHash Data to be hashed.\r | |
102 | @param DataToHashLen Data size.\r | |
103 | \r | |
104 | @retval EFI_SUCCESS Hash sequence updated.\r | |
105 | **/\r | |
106 | EFI_STATUS\r | |
107 | EFIAPI\r | |
108 | HashUpdate (\r | |
109 | IN HASH_HANDLE HashHandle,\r | |
110 | IN VOID *DataToHash,\r | |
111 | IN UINTN DataToHashLen\r | |
112 | )\r | |
113 | {\r | |
114 | HASH_INTERFACE_HOB *HashInterfaceHob;\r | |
115 | HASH_HANDLE *HashCtx;\r | |
116 | UINTN Index;\r | |
117 | \r | |
118 | HashInterfaceHob = InternalGetHashInterface ();\r | |
119 | if (HashInterfaceHob == NULL) {\r | |
120 | return EFI_UNSUPPORTED;\r | |
121 | }\r | |
122 | \r | |
123 | if (HashInterfaceHob->HashInterfaceCount == 0) {\r | |
124 | return EFI_UNSUPPORTED;\r | |
125 | }\r | |
126 | \r | |
127 | HashCtx = (HASH_HANDLE *)HashHandle;\r | |
128 | \r | |
129 | for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r | |
130 | HashInterfaceHob->HashInterface[Index].HashUpdate (HashCtx[Index], DataToHash, DataToHashLen);\r | |
131 | }\r | |
132 | \r | |
133 | return EFI_SUCCESS;\r | |
134 | }\r | |
135 | \r | |
136 | /**\r | |
137 | Hash sequence complete and extend to PCR.\r | |
138 | \r | |
139 | @param HashHandle Hash handle.\r | |
140 | @param PcrIndex PCR to be extended.\r | |
141 | @param DataToHash Data to be hashed.\r | |
142 | @param DataToHashLen Data size.\r | |
143 | @param DigestList Digest list.\r | |
144 | \r | |
145 | @retval EFI_SUCCESS Hash sequence complete and DigestList is returned.\r | |
146 | **/\r | |
147 | EFI_STATUS\r | |
148 | EFIAPI\r | |
149 | HashCompleteAndExtend (\r | |
150 | IN HASH_HANDLE HashHandle,\r | |
151 | IN TPMI_DH_PCR PcrIndex,\r | |
152 | IN VOID *DataToHash,\r | |
153 | IN UINTN DataToHashLen,\r | |
154 | OUT TPML_DIGEST_VALUES *DigestList\r | |
155 | )\r | |
156 | {\r | |
157 | TPML_DIGEST_VALUES Digest;\r | |
158 | HASH_INTERFACE_HOB *HashInterfaceHob;\r | |
159 | HASH_HANDLE *HashCtx;\r | |
160 | UINTN Index;\r | |
161 | EFI_STATUS Status;\r | |
162 | \r | |
163 | HashInterfaceHob = InternalGetHashInterface ();\r | |
164 | if (HashInterfaceHob == NULL) {\r | |
165 | return EFI_UNSUPPORTED;\r | |
166 | }\r | |
167 | \r | |
168 | if (HashInterfaceHob->HashInterfaceCount == 0) {\r | |
169 | return EFI_UNSUPPORTED;\r | |
170 | }\r | |
171 | \r | |
172 | HashCtx = (HASH_HANDLE *)HashHandle;\r | |
173 | ZeroMem (DigestList, sizeof(*DigestList));\r | |
174 | \r | |
175 | for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r | |
176 | HashInterfaceHob->HashInterface[Index].HashUpdate (HashCtx[Index], DataToHash, DataToHashLen);\r | |
177 | HashInterfaceHob->HashInterface[Index].HashFinal (HashCtx[Index], &Digest);\r | |
178 | Tpm2SetHashToDigestList (DigestList, &Digest);\r | |
179 | }\r | |
180 | \r | |
181 | FreePool (HashCtx);\r | |
182 | \r | |
183 | Status = Tpm2PcrExtend (\r | |
184 | PcrIndex,\r | |
185 | DigestList\r | |
186 | );\r | |
187 | return Status;\r | |
188 | }\r | |
189 | \r | |
190 | /**\r | |
191 | Hash data and extend to PCR.\r | |
192 | \r | |
193 | @param PcrIndex PCR to be extended.\r | |
194 | @param DataToHash Data to be hashed.\r | |
195 | @param DataToHashLen Data size.\r | |
196 | @param DigestList Digest list.\r | |
197 | \r | |
198 | @retval EFI_SUCCESS Hash data and DigestList is returned.\r | |
199 | **/\r | |
200 | EFI_STATUS\r | |
201 | EFIAPI\r | |
202 | HashAndExtend (\r | |
203 | IN TPMI_DH_PCR PcrIndex,\r | |
204 | IN VOID *DataToHash,\r | |
205 | IN UINTN DataToHashLen,\r | |
206 | OUT TPML_DIGEST_VALUES *DigestList\r | |
207 | )\r | |
208 | {\r | |
209 | HASH_INTERFACE_HOB *HashInterfaceHob;\r | |
210 | HASH_HANDLE HashHandle;\r | |
211 | EFI_STATUS Status;\r | |
212 | \r | |
213 | HashInterfaceHob = InternalGetHashInterface ();\r | |
214 | if (HashInterfaceHob == NULL) {\r | |
215 | return EFI_UNSUPPORTED;\r | |
216 | }\r | |
217 | \r | |
218 | if (HashInterfaceHob->HashInterfaceCount == 0) {\r | |
219 | return EFI_UNSUPPORTED;\r | |
220 | }\r | |
221 | \r | |
222 | HashStart (&HashHandle);\r | |
223 | HashUpdate (HashHandle, DataToHash, DataToHashLen);\r | |
224 | Status = HashCompleteAndExtend (HashHandle, PcrIndex, NULL, 0, DigestList);\r | |
225 | \r | |
226 | return Status;\r | |
227 | }\r | |
228 | \r | |
229 | /**\r | |
230 | This service register Hash.\r | |
231 | \r | |
232 | @param HashInterface Hash interface\r | |
233 | \r | |
234 | @retval EFI_SUCCESS This hash interface is registered successfully.\r | |
235 | @retval EFI_UNSUPPORTED System does not support register this interface.\r | |
236 | @retval EFI_ALREADY_STARTED System already register this interface.\r | |
237 | **/\r | |
238 | EFI_STATUS\r | |
239 | EFIAPI\r | |
240 | RegisterHashInterfaceLib (\r | |
241 | IN HASH_INTERFACE *HashInterface\r | |
242 | )\r | |
243 | {\r | |
244 | UINTN Index;\r | |
245 | HASH_INTERFACE_HOB *HashInterfaceHob;\r | |
246 | HASH_INTERFACE_HOB LocalHashInterfaceHob;\r | |
247 | UINT32 HashMask;\r | |
248 | \r | |
249 | //\r | |
250 | // Check allow\r | |
251 | //\r | |
252 | HashMask = Tpm2GetHashMaskFromAlgo (&HashInterface->HashGuid);\r | |
253 | if ((HashMask & PcdGet32 (PcdTpm2HashMask)) == 0) {\r | |
254 | return EFI_UNSUPPORTED;\r | |
255 | }\r | |
256 | \r | |
257 | HashInterfaceHob = InternalGetHashInterface ();\r | |
258 | if (HashInterfaceHob == NULL) {\r | |
259 | ZeroMem (&LocalHashInterfaceHob, sizeof(LocalHashInterfaceHob));\r | |
260 | HashInterfaceHob = BuildGuidDataHob (&mHashLibPeiRouterGuid, &LocalHashInterfaceHob, sizeof(LocalHashInterfaceHob));\r | |
261 | if (HashInterfaceHob == NULL) {\r | |
262 | return EFI_OUT_OF_RESOURCES;\r | |
263 | }\r | |
264 | }\r | |
265 | \r | |
266 | if (HashInterfaceHob->HashInterfaceCount >= HASH_COUNT) {\r | |
267 | return EFI_OUT_OF_RESOURCES;\r | |
268 | }\r | |
269 | \r | |
270 | //\r | |
271 | // Check duplication\r | |
272 | //\r | |
273 | for (Index = 0; Index < HashInterfaceHob->HashInterfaceCount; Index++) {\r | |
274 | if (CompareGuid (&HashInterfaceHob->HashInterface[Index].HashGuid, &HashInterface->HashGuid)) {\r | |
275 | //\r | |
276 | // In PEI phase, there will be shadow driver dispatched again.\r | |
277 | //\r | |
33985e3b | 278 | DEBUG ((EFI_D_INFO, "RegisterHashInterfaceLib - Override\n"));\r |
c1d93242 JY |
279 | CopyMem (&HashInterfaceHob->HashInterface[Index], HashInterface, sizeof(*HashInterface));\r |
280 | return EFI_SUCCESS;\r | |
281 | }\r | |
282 | }\r | |
283 | \r | |
284 | CopyMem (&HashInterfaceHob->HashInterface[HashInterfaceHob->HashInterfaceCount], HashInterface, sizeof(*HashInterface));\r | |
285 | HashInterfaceHob->HashInterfaceCount ++;\r | |
286 | \r | |
287 | return EFI_SUCCESS;\r | |
288 | } |