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1 | /** @file\r |
2 | ParallelHash Implementation.\r | |
3 | \r | |
4 | Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>\r | |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
6 | \r | |
7 | **/\r | |
8 | \r | |
9 | #include "CryptParallelHash.h"\r | |
10 | #include <Library/MmServicesTableLib.h>\r | |
11 | #include <Library/SynchronizationLib.h>\r | |
12 | \r | |
13 | #define PARALLELHASH_CUSTOMIZATION "ParallelHash"\r | |
14 | \r | |
15 | UINTN mBlockNum;\r | |
16 | UINTN mBlockSize;\r | |
17 | UINTN mLastBlockSize;\r | |
18 | UINT8 *mInput;\r | |
19 | UINTN mBlockResultSize;\r | |
20 | UINT8 *mBlockHashResult;\r | |
21 | BOOLEAN *mBlockIsCompleted;\r | |
22 | SPIN_LOCK *mSpinLockList;\r | |
23 | \r | |
24 | /**\r | |
25 | Complete computation of digest of each block.\r | |
26 | \r | |
27 | Each AP perform the function called by BSP.\r | |
28 | \r | |
29 | @param[in] ProcedureArgument Argument of the procedure.\r | |
30 | **/\r | |
31 | VOID\r | |
32 | EFIAPI\r | |
33 | ParallelHashApExecute (\r | |
34 | IN VOID *ProcedureArgument\r | |
35 | )\r | |
36 | {\r | |
37 | UINTN Index;\r | |
38 | BOOLEAN Status;\r | |
39 | \r | |
40 | for (Index = 0; Index < mBlockNum; Index++) {\r | |
41 | if (AcquireSpinLockOrFail (&mSpinLockList[Index])) {\r | |
42 | //\r | |
43 | // Completed, try next one.\r | |
44 | //\r | |
45 | if (mBlockIsCompleted[Index]) {\r | |
46 | ReleaseSpinLock (&mSpinLockList[Index]);\r | |
47 | continue;\r | |
48 | }\r | |
49 | \r | |
50 | //\r | |
51 | // Calculate CShake256 for this block.\r | |
52 | //\r | |
53 | Status = CShake256HashAll (\r | |
54 | mInput + Index * mBlockSize,\r | |
55 | (Index == (mBlockNum - 1)) ? mLastBlockSize : mBlockSize,\r | |
56 | mBlockResultSize,\r | |
57 | NULL,\r | |
58 | 0,\r | |
59 | NULL,\r | |
60 | 0,\r | |
61 | mBlockHashResult + Index * mBlockResultSize\r | |
62 | );\r | |
63 | if (!EFI_ERROR (Status)) {\r | |
64 | mBlockIsCompleted[Index] = TRUE;\r | |
65 | }\r | |
66 | \r | |
67 | ReleaseSpinLock (&mSpinLockList[Index]);\r | |
68 | }\r | |
69 | }\r | |
70 | }\r | |
71 | \r | |
72 | /**\r | |
73 | Dispatch the block task to each AP in SMM mode.\r | |
74 | \r | |
75 | **/\r | |
76 | VOID\r | |
77 | EFIAPI\r | |
78 | MmDispatchBlockToAP (\r | |
79 | VOID\r | |
80 | )\r | |
81 | {\r | |
82 | UINTN Index;\r | |
83 | \r | |
84 | for (Index = 0; Index < gMmst->NumberOfCpus; Index++) {\r | |
85 | if (Index != gMmst->CurrentlyExecutingCpu) {\r | |
86 | gMmst->MmStartupThisAp (ParallelHashApExecute, Index, NULL);\r | |
87 | }\r | |
88 | }\r | |
89 | \r | |
90 | return;\r | |
91 | }\r | |
92 | \r | |
93 | /**\r | |
94 | Parallel hash function ParallelHash256, as defined in NIST's Special Publication 800-185,\r | |
95 | published December 2016.\r | |
96 | \r | |
97 | @param[in] Input Pointer to the input message (X).\r | |
98 | @param[in] InputByteLen The number(>0) of input bytes provided for the input data.\r | |
99 | @param[in] BlockSize The size of each block (B).\r | |
100 | @param[out] Output Pointer to the output buffer.\r | |
101 | @param[in] OutputByteLen The desired number of output bytes (L).\r | |
102 | @param[in] Customization Pointer to the customization string (S).\r | |
103 | @param[in] CustomByteLen The length of the customization string in bytes.\r | |
104 | \r | |
105 | @retval TRUE ParallelHash256 digest computation succeeded.\r | |
106 | @retval FALSE ParallelHash256 digest computation failed.\r | |
107 | @retval FALSE This interface is not supported.\r | |
108 | \r | |
109 | **/\r | |
110 | BOOLEAN\r | |
111 | EFIAPI\r | |
112 | ParallelHash256HashAll (\r | |
113 | IN CONST VOID *Input,\r | |
114 | IN UINTN InputByteLen,\r | |
115 | IN UINTN BlockSize,\r | |
116 | OUT VOID *Output,\r | |
117 | IN UINTN OutputByteLen,\r | |
118 | IN CONST VOID *Customization,\r | |
119 | IN UINTN CustomByteLen\r | |
120 | )\r | |
121 | {\r | |
122 | UINT8 EncBufB[sizeof (UINTN)+1];\r | |
123 | UINTN EncSizeB;\r | |
124 | UINT8 EncBufN[sizeof (UINTN)+1];\r | |
125 | UINTN EncSizeN;\r | |
126 | UINT8 EncBufL[sizeof (UINTN)+1];\r | |
127 | UINTN EncSizeL;\r | |
128 | UINTN Index;\r | |
129 | UINT8 *CombinedInput;\r | |
130 | UINTN CombinedInputSize;\r | |
131 | BOOLEAN AllCompleted;\r | |
132 | UINTN Offset;\r | |
133 | BOOLEAN ReturnValue;\r | |
134 | \r | |
135 | if ((InputByteLen == 0) || (OutputByteLen == 0) || (BlockSize == 0)) {\r | |
136 | return FALSE;\r | |
137 | }\r | |
138 | \r | |
139 | if ((Input == NULL) || (Output == NULL)) {\r | |
140 | return FALSE;\r | |
141 | }\r | |
142 | \r | |
143 | if ((CustomByteLen != 0) && (Customization == NULL)) {\r | |
144 | return FALSE;\r | |
145 | }\r | |
146 | \r | |
147 | mBlockSize = BlockSize;\r | |
148 | \r | |
149 | //\r | |
150 | // Calculate block number n.\r | |
151 | //\r | |
152 | mBlockNum = InputByteLen % mBlockSize == 0 ? InputByteLen / mBlockSize : InputByteLen / mBlockSize + 1;\r | |
153 | \r | |
154 | //\r | |
155 | // Set hash result size of each block in bytes.\r | |
156 | //\r | |
157 | mBlockResultSize = OutputByteLen;\r | |
158 | \r | |
159 | //\r | |
160 | // Encode B, n, L to string and record size.\r | |
161 | //\r | |
162 | EncSizeB = LeftEncode (EncBufB, mBlockSize);\r | |
163 | EncSizeN = RightEncode (EncBufN, mBlockNum);\r | |
164 | EncSizeL = RightEncode (EncBufL, OutputByteLen * CHAR_BIT);\r | |
165 | \r | |
166 | //\r | |
167 | // Allocate buffer for combined input (newX), Block completed flag and SpinLock.\r | |
168 | //\r | |
169 | CombinedInputSize = EncSizeB + EncSizeN + EncSizeL + mBlockNum * mBlockResultSize;\r | |
170 | CombinedInput = AllocateZeroPool (CombinedInputSize);\r | |
171 | mBlockIsCompleted = AllocateZeroPool (mBlockNum * sizeof (BOOLEAN));\r | |
172 | mSpinLockList = AllocatePool (mBlockNum * sizeof (SPIN_LOCK));\r | |
173 | if ((CombinedInput == NULL) || (mBlockIsCompleted == NULL) || (mSpinLockList == NULL)) {\r | |
174 | ReturnValue = FALSE;\r | |
175 | goto Exit;\r | |
176 | }\r | |
177 | \r | |
178 | //\r | |
179 | // Fill LeftEncode(B).\r | |
180 | //\r | |
181 | CopyMem (CombinedInput, EncBufB, EncSizeB);\r | |
182 | \r | |
183 | //\r | |
184 | // Prepare for parallel hash.\r | |
185 | //\r | |
186 | mBlockHashResult = CombinedInput + EncSizeB;\r | |
187 | mInput = (UINT8 *)Input;\r | |
188 | mLastBlockSize = InputByteLen % mBlockSize == 0 ? mBlockSize : InputByteLen % mBlockSize;\r | |
189 | \r | |
190 | //\r | |
191 | // Initialize SpinLock for each result block.\r | |
192 | //\r | |
193 | for (Index = 0; Index < mBlockNum; Index++) {\r | |
194 | InitializeSpinLock (&mSpinLockList[Index]);\r | |
195 | }\r | |
196 | \r | |
197 | //\r | |
198 | // Dispatch blocklist to each AP.\r | |
199 | //\r | |
200 | if (gMmst != NULL) {\r | |
201 | MmDispatchBlockToAP ();\r | |
202 | }\r | |
203 | \r | |
204 | //\r | |
205 | // Wait until all block hash completed.\r | |
206 | //\r | |
207 | do {\r | |
208 | AllCompleted = TRUE;\r | |
209 | for (Index = 0; Index < mBlockNum; Index++) {\r | |
210 | if (AcquireSpinLockOrFail (&mSpinLockList[Index])) {\r | |
211 | if (!mBlockIsCompleted[Index]) {\r | |
212 | AllCompleted = FALSE;\r | |
213 | ReturnValue = CShake256HashAll (\r | |
214 | mInput + Index * mBlockSize,\r | |
215 | (Index == (mBlockNum - 1)) ? mLastBlockSize : mBlockSize,\r | |
216 | mBlockResultSize,\r | |
217 | NULL,\r | |
218 | 0,\r | |
219 | NULL,\r | |
220 | 0,\r | |
221 | mBlockHashResult + Index * mBlockResultSize\r | |
222 | );\r | |
223 | if (ReturnValue) {\r | |
224 | mBlockIsCompleted[Index] = TRUE;\r | |
225 | }\r | |
226 | \r | |
227 | ReleaseSpinLock (&mSpinLockList[Index]);\r | |
228 | break;\r | |
229 | }\r | |
230 | \r | |
231 | ReleaseSpinLock (&mSpinLockList[Index]);\r | |
232 | } else {\r | |
233 | AllCompleted = FALSE;\r | |
234 | break;\r | |
235 | }\r | |
236 | }\r | |
237 | } while (!AllCompleted);\r | |
238 | \r | |
239 | //\r | |
240 | // Fill LeftEncode(n).\r | |
241 | //\r | |
242 | Offset = EncSizeB + mBlockNum * mBlockResultSize;\r | |
243 | CopyMem (CombinedInput + Offset, EncBufN, EncSizeN);\r | |
244 | \r | |
245 | //\r | |
246 | // Fill LeftEncode(L).\r | |
247 | //\r | |
248 | Offset += EncSizeN;\r | |
249 | CopyMem (CombinedInput + Offset, EncBufL, EncSizeL);\r | |
250 | \r | |
251 | ReturnValue = CShake256HashAll (\r | |
252 | CombinedInput,\r | |
253 | CombinedInputSize,\r | |
254 | OutputByteLen,\r | |
255 | PARALLELHASH_CUSTOMIZATION,\r | |
256 | AsciiStrLen (PARALLELHASH_CUSTOMIZATION),\r | |
257 | Customization,\r | |
258 | CustomByteLen,\r | |
259 | Output\r | |
260 | );\r | |
261 | \r | |
262 | Exit:\r | |
263 | ZeroMem (CombinedInput, CombinedInputSize);\r | |
264 | \r | |
265 | if (CombinedInput != NULL) {\r | |
266 | FreePool (CombinedInput);\r | |
267 | }\r | |
268 | \r | |
269 | if (mSpinLockList != NULL) {\r | |
270 | FreePool ((VOID *)mSpinLockList);\r | |
271 | }\r | |
272 | \r | |
273 | if (mBlockIsCompleted != NULL) {\r | |
274 | FreePool (mBlockIsCompleted);\r | |
275 | }\r | |
276 | \r | |
277 | return ReturnValue;\r | |
278 | }\r |