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1 | /** @file\r | |
2 | This 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 | |
6 | Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved. <BR>\r | |
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 | |
28 | HASH_INTERFACE mHashInterface[HASH_COUNT] = {{{0}, NULL, NULL, NULL}};\r | |
29 | UINTN mHashInterfaceCount = 0;\r | |
30 | \r | |
31 | /**\r | |
32 | Start hash sequence.\r | |
33 | \r | |
34 | @param HashHandle Hash handle.\r | |
35 | \r | |
36 | @retval EFI_SUCCESS Hash sequence start and HandleHandle returned.\r | |
37 | @retval EFI_OUT_OF_RESOURCES No enough resource to start hash.\r | |
38 | **/\r | |
39 | EFI_STATUS\r | |
40 | EFIAPI\r | |
41 | HashStart (\r | |
42 | OUT HASH_HANDLE *HashHandle\r | |
43 | )\r | |
44 | {\r | |
45 | HASH_HANDLE *HashCtx;\r | |
46 | UINTN Index;\r | |
47 | UINT32 HashMask;\r | |
48 | \r | |
49 | if (mHashInterfaceCount == 0) {\r | |
50 | return EFI_UNSUPPORTED;\r | |
51 | }\r | |
52 | \r | |
53 | HashCtx = AllocatePool (sizeof(*HashCtx) * mHashInterfaceCount);\r | |
54 | ASSERT (HashCtx != NULL);\r | |
55 | \r | |
56 | for (Index = 0; Index < mHashInterfaceCount; Index++) {\r | |
57 | HashMask = Tpm2GetHashMaskFromAlgo (&mHashInterface[Index].HashGuid);\r | |
58 | if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r | |
59 | mHashInterface[Index].HashInit (&HashCtx[Index]);\r | |
60 | }\r | |
61 | }\r | |
62 | \r | |
63 | *HashHandle = (HASH_HANDLE)HashCtx;\r | |
64 | \r | |
65 | return EFI_SUCCESS;\r | |
66 | }\r | |
67 | \r | |
68 | /**\r | |
69 | Update hash sequence data.\r | |
70 | \r | |
71 | @param HashHandle Hash handle.\r | |
72 | @param DataToHash Data to be hashed.\r | |
73 | @param DataToHashLen Data size.\r | |
74 | \r | |
75 | @retval EFI_SUCCESS Hash sequence updated.\r | |
76 | **/\r | |
77 | EFI_STATUS\r | |
78 | EFIAPI\r | |
79 | HashUpdate (\r | |
80 | IN HASH_HANDLE HashHandle,\r | |
81 | IN VOID *DataToHash,\r | |
82 | IN UINTN DataToHashLen\r | |
83 | )\r | |
84 | {\r | |
85 | HASH_HANDLE *HashCtx;\r | |
86 | UINTN Index;\r | |
87 | UINT32 HashMask;\r | |
88 | \r | |
89 | if (mHashInterfaceCount == 0) {\r | |
90 | return EFI_UNSUPPORTED;\r | |
91 | }\r | |
92 | \r | |
93 | HashCtx = (HASH_HANDLE *)HashHandle;\r | |
94 | \r | |
95 | for (Index = 0; Index < mHashInterfaceCount; Index++) {\r | |
96 | HashMask = Tpm2GetHashMaskFromAlgo (&mHashInterface[Index].HashGuid);\r | |
97 | if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r | |
98 | mHashInterface[Index].HashUpdate (HashCtx[Index], DataToHash, DataToHashLen);\r | |
99 | }\r | |
100 | }\r | |
101 | \r | |
102 | return EFI_SUCCESS;\r | |
103 | }\r | |
104 | \r | |
105 | /**\r | |
106 | Hash sequence complete and extend to PCR.\r | |
107 | \r | |
108 | @param HashHandle Hash handle.\r | |
109 | @param PcrIndex PCR to be extended.\r | |
110 | @param DataToHash Data to be hashed.\r | |
111 | @param DataToHashLen Data size.\r | |
112 | @param DigestList Digest list.\r | |
113 | \r | |
114 | @retval EFI_SUCCESS Hash sequence complete and DigestList is returned.\r | |
115 | **/\r | |
116 | EFI_STATUS\r | |
117 | EFIAPI\r | |
118 | HashCompleteAndExtend (\r | |
119 | IN HASH_HANDLE HashHandle,\r | |
120 | IN TPMI_DH_PCR PcrIndex,\r | |
121 | IN VOID *DataToHash,\r | |
122 | IN UINTN DataToHashLen,\r | |
123 | OUT TPML_DIGEST_VALUES *DigestList\r | |
124 | )\r | |
125 | {\r | |
126 | TPML_DIGEST_VALUES Digest;\r | |
127 | HASH_HANDLE *HashCtx;\r | |
128 | UINTN Index;\r | |
129 | EFI_STATUS Status;\r | |
130 | UINT32 HashMask;\r | |
131 | \r | |
132 | if (mHashInterfaceCount == 0) {\r | |
133 | return EFI_UNSUPPORTED;\r | |
134 | }\r | |
135 | \r | |
136 | HashCtx = (HASH_HANDLE *)HashHandle;\r | |
137 | ZeroMem (DigestList, sizeof(*DigestList));\r | |
138 | \r | |
139 | for (Index = 0; Index < mHashInterfaceCount; Index++) {\r | |
140 | HashMask = Tpm2GetHashMaskFromAlgo (&mHashInterface[Index].HashGuid);\r | |
141 | if ((HashMask & PcdGet32 (PcdTpm2HashMask)) != 0) {\r | |
142 | mHashInterface[Index].HashUpdate (HashCtx[Index], DataToHash, DataToHashLen);\r | |
143 | mHashInterface[Index].HashFinal (HashCtx[Index], &Digest);\r | |
144 | Tpm2SetHashToDigestList (DigestList, &Digest);\r | |
145 | }\r | |
146 | }\r | |
147 | \r | |
148 | FreePool (HashCtx);\r | |
149 | \r | |
150 | Status = Tpm2PcrExtend (\r | |
151 | PcrIndex,\r | |
152 | DigestList\r | |
153 | );\r | |
154 | return Status;\r | |
155 | }\r | |
156 | \r | |
157 | /**\r | |
158 | Hash data and extend to PCR.\r | |
159 | \r | |
160 | @param PcrIndex PCR to be extended.\r | |
161 | @param DataToHash Data to be hashed.\r | |
162 | @param DataToHashLen Data size.\r | |
163 | @param DigestList Digest list.\r | |
164 | \r | |
165 | @retval EFI_SUCCESS Hash data and DigestList is returned.\r | |
166 | **/\r | |
167 | EFI_STATUS\r | |
168 | EFIAPI\r | |
169 | HashAndExtend (\r | |
170 | IN TPMI_DH_PCR PcrIndex,\r | |
171 | IN VOID *DataToHash,\r | |
172 | IN UINTN DataToHashLen,\r | |
173 | OUT TPML_DIGEST_VALUES *DigestList\r | |
174 | )\r | |
175 | {\r | |
176 | HASH_HANDLE HashHandle;\r | |
177 | EFI_STATUS Status;\r | |
178 | \r | |
179 | if (mHashInterfaceCount == 0) {\r | |
180 | return EFI_UNSUPPORTED;\r | |
181 | }\r | |
182 | \r | |
183 | HashStart (&HashHandle);\r | |
184 | HashUpdate (HashHandle, DataToHash, DataToHashLen);\r | |
185 | Status = HashCompleteAndExtend (HashHandle, PcrIndex, NULL, 0, DigestList);\r | |
186 | \r | |
187 | return Status;\r | |
188 | }\r | |
189 | \r | |
190 | /**\r | |
191 | This service register Hash.\r | |
192 | \r | |
193 | @param HashInterface Hash interface\r | |
194 | \r | |
195 | @retval EFI_SUCCESS This hash interface is registered successfully.\r | |
196 | @retval EFI_UNSUPPORTED System does not support register this interface.\r | |
197 | @retval EFI_ALREADY_STARTED System already register this interface.\r | |
198 | **/\r | |
199 | EFI_STATUS\r | |
200 | EFIAPI\r | |
201 | RegisterHashInterfaceLib (\r | |
202 | IN HASH_INTERFACE *HashInterface\r | |
203 | )\r | |
204 | {\r | |
205 | UINTN Index;\r | |
206 | UINT32 HashMask;\r | |
207 | UINT32 BiosSupportedHashMask;\r | |
208 | EFI_STATUS Status;\r | |
209 | \r | |
210 | //\r | |
211 | // Check allow\r | |
212 | //\r | |
213 | HashMask = Tpm2GetHashMaskFromAlgo (&HashInterface->HashGuid);\r | |
214 | if ((HashMask & PcdGet32 (PcdTpm2HashMask)) == 0) {\r | |
215 | return EFI_UNSUPPORTED;\r | |
216 | }\r | |
217 | \r | |
218 | if (mHashInterfaceCount >= sizeof(mHashInterface)/sizeof(mHashInterface[0])) {\r | |
219 | return EFI_OUT_OF_RESOURCES;\r | |
220 | }\r | |
221 | BiosSupportedHashMask = PcdGet32 (PcdTcg2HashAlgorithmBitmap);\r | |
222 | Status = PcdSet32S (PcdTcg2HashAlgorithmBitmap, BiosSupportedHashMask | HashMask);\r | |
223 | ASSERT_EFI_ERROR (Status);\r | |
224 | \r | |
225 | //\r | |
226 | // Check duplication\r | |
227 | //\r | |
228 | for (Index = 0; Index < mHashInterfaceCount; Index++) {\r | |
229 | if (CompareGuid (&mHashInterface[Index].HashGuid, &HashInterface->HashGuid)) {\r | |
230 | return EFI_ALREADY_STARTED;\r | |
231 | }\r | |
232 | }\r | |
233 | \r | |
234 | CopyMem (&mHashInterface[mHashInterfaceCount], HashInterface, sizeof(*HashInterface));\r | |
235 | mHashInterfaceCount ++;\r | |
236 | \r | |
237 | return EFI_SUCCESS;\r | |
238 | } |