| 1 | /** @file\r |
| 2 | This library is BaseCrypto SHA256 hash instance.\r |
| 3 | It can be registered to BaseCrypto router, to serve as hash engine.\r |
| 4 | \r |
| 5 | Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved. <BR>\r |
| 6 | This program and the accompanying materials\r |
| 7 | are licensed and made available under the terms and conditions of the BSD License\r |
| 8 | which accompanies this distribution. The full text of the license may be found at\r |
| 9 | http://opensource.org/licenses/bsd-license.php\r |
| 10 | \r |
| 11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
| 12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
| 13 | \r |
| 14 | **/\r |
| 15 | \r |
| 16 | #include <PiPei.h>\r |
| 17 | #include <Library/BaseLib.h>\r |
| 18 | #include <Library/BaseMemoryLib.h>\r |
| 19 | #include <Library/Tpm2CommandLib.h>\r |
| 20 | #include <Library/DebugLib.h>\r |
| 21 | #include <Library/BaseCryptLib.h>\r |
| 22 | #include <Library/MemoryAllocationLib.h>\r |
| 23 | #include <Library/HashLib.h>\r |
| 24 | \r |
| 25 | /**\r |
| 26 | The function set SHA256 to digest list.\r |
| 27 | \r |
| 28 | @param DigestList digest list\r |
| 29 | @param Sha256Digest SHA256 digest\r |
| 30 | **/\r |
| 31 | VOID\r |
| 32 | Tpm2SetSha256ToDigestList (\r |
| 33 | IN TPML_DIGEST_VALUES *DigestList,\r |
| 34 | IN UINT8 *Sha256Digest\r |
| 35 | )\r |
| 36 | {\r |
| 37 | DigestList->count = 1;\r |
| 38 | DigestList->digests[0].hashAlg = TPM_ALG_SHA256;\r |
| 39 | CopyMem (\r |
| 40 | DigestList->digests[0].digest.sha256,\r |
| 41 | Sha256Digest,\r |
| 42 | SHA256_DIGEST_SIZE\r |
| 43 | );\r |
| 44 | }\r |
| 45 | \r |
| 46 | /**\r |
| 47 | Start hash sequence.\r |
| 48 | \r |
| 49 | @param HashHandle Hash handle.\r |
| 50 | \r |
| 51 | @retval EFI_SUCCESS Hash sequence start and HandleHandle returned.\r |
| 52 | @retval EFI_OUT_OF_RESOURCES No enough resource to start hash.\r |
| 53 | **/\r |
| 54 | EFI_STATUS\r |
| 55 | EFIAPI\r |
| 56 | Sha256HashInit (\r |
| 57 | OUT HASH_HANDLE *HashHandle\r |
| 58 | )\r |
| 59 | {\r |
| 60 | VOID *Sha256Ctx;\r |
| 61 | UINTN CtxSize;\r |
| 62 | \r |
| 63 | CtxSize = Sha256GetContextSize ();\r |
| 64 | Sha256Ctx = AllocatePool (CtxSize);\r |
| 65 | ASSERT (Sha256Ctx != NULL);\r |
| 66 | \r |
| 67 | Sha256Init (Sha256Ctx);\r |
| 68 | \r |
| 69 | *HashHandle = (HASH_HANDLE)Sha256Ctx;\r |
| 70 | \r |
| 71 | return EFI_SUCCESS;\r |
| 72 | }\r |
| 73 | \r |
| 74 | /**\r |
| 75 | Update hash sequence data.\r |
| 76 | \r |
| 77 | @param HashHandle Hash handle.\r |
| 78 | @param DataToHash Data to be hashed.\r |
| 79 | @param DataToHashLen Data size.\r |
| 80 | \r |
| 81 | @retval EFI_SUCCESS Hash sequence updated.\r |
| 82 | **/\r |
| 83 | EFI_STATUS\r |
| 84 | EFIAPI\r |
| 85 | Sha256HashUpdate (\r |
| 86 | IN HASH_HANDLE HashHandle,\r |
| 87 | IN VOID *DataToHash,\r |
| 88 | IN UINTN DataToHashLen\r |
| 89 | )\r |
| 90 | {\r |
| 91 | VOID *Sha256Ctx;\r |
| 92 | \r |
| 93 | Sha256Ctx = (VOID *)HashHandle;\r |
| 94 | Sha256Update (Sha256Ctx, DataToHash, DataToHashLen);\r |
| 95 | \r |
| 96 | return EFI_SUCCESS;\r |
| 97 | }\r |
| 98 | \r |
| 99 | /**\r |
| 100 | Complete hash sequence complete.\r |
| 101 | \r |
| 102 | @param HashHandle Hash handle.\r |
| 103 | @param DigestList Digest list.\r |
| 104 | \r |
| 105 | @retval EFI_SUCCESS Hash sequence complete and DigestList is returned.\r |
| 106 | **/\r |
| 107 | EFI_STATUS\r |
| 108 | EFIAPI\r |
| 109 | Sha256HashFinal (\r |
| 110 | IN HASH_HANDLE HashHandle,\r |
| 111 | OUT TPML_DIGEST_VALUES *DigestList\r |
| 112 | )\r |
| 113 | {\r |
| 114 | UINT8 Digest[SHA256_DIGEST_SIZE];\r |
| 115 | VOID *Sha256Ctx;\r |
| 116 | \r |
| 117 | Sha256Ctx = (VOID *)HashHandle;\r |
| 118 | Sha256Final (Sha256Ctx, Digest);\r |
| 119 | \r |
| 120 | FreePool (Sha256Ctx);\r |
| 121 | \r |
| 122 | Tpm2SetSha256ToDigestList (DigestList, Digest);\r |
| 123 | \r |
| 124 | return EFI_SUCCESS;\r |
| 125 | }\r |
| 126 | \r |
| 127 | HASH_INTERFACE mSha256InternalHashInstance = {\r |
| 128 | HASH_ALGORITHM_SHA256_GUID,\r |
| 129 | Sha256HashInit,\r |
| 130 | Sha256HashUpdate,\r |
| 131 | Sha256HashFinal,\r |
| 132 | };\r |
| 133 | \r |
| 134 | /**\r |
| 135 | The function register SHA256 instance.\r |
| 136 | \r |
| 137 | @retval EFI_SUCCESS SHA256 instance is registered, or system dose not surpport registr SHA256 instance\r |
| 138 | **/\r |
| 139 | EFI_STATUS\r |
| 140 | EFIAPI\r |
| 141 | HashInstanceLibSha256Constructor (\r |
| 142 | VOID\r |
| 143 | )\r |
| 144 | {\r |
| 145 | EFI_STATUS Status;\r |
| 146 | \r |
| 147 | Status = RegisterHashInterfaceLib (&mSha256InternalHashInstance);\r |
| 148 | if ((Status == EFI_SUCCESS) || (Status == EFI_UNSUPPORTED)) {\r |
| 149 | //\r |
| 150 | // Unsupported means platform policy does not need this instance enabled.\r |
| 151 | //\r |
| 152 | return EFI_SUCCESS;\r |
| 153 | }\r |
| 154 | return Status;\r |
| 155 | } |