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1 | /** @file\r |
2 | SHA-256 Digest Wrapper Implementation over OpenSSL.\r | |
3 | \r | |
16d2c32c | 4 | Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>\r |
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5 | This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
a8c44645 | 15 | #include "InternalCryptLib.h"\r |
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16 | #include <openssl/sha.h>\r |
17 | \r | |
97f98500 | 18 | /**\r |
a8c44645 | 19 | Retrieves the size, in bytes, of the context buffer required for SHA-256 hash operations.\r |
97f98500 | 20 | \r |
a8c44645 | 21 | @return The size, in bytes, of the context buffer required for SHA-256 hash operations.\r |
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22 | \r |
23 | **/\r | |
24 | UINTN\r | |
25 | EFIAPI\r | |
26 | Sha256GetContextSize (\r | |
27 | VOID\r | |
28 | )\r | |
29 | {\r | |
30 | //\r | |
31 | // Retrieves OpenSSL SHA-256 Context Size\r | |
32 | //\r | |
6b8ebcb8 | 33 | return (UINTN) (sizeof (SHA256_CTX));\r |
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34 | }\r |
35 | \r | |
97f98500 HT |
36 | /**\r |
37 | Initializes user-supplied memory pointed by Sha256Context as SHA-256 hash context for\r | |
38 | subsequent use.\r | |
39 | \r | |
16d2c32c | 40 | If Sha256Context is NULL, then return FALSE.\r |
97f98500 | 41 | \r |
a8c44645 | 42 | @param[out] Sha256Context Pointer to SHA-256 context being initialized.\r |
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43 | \r |
44 | @retval TRUE SHA-256 context initialization succeeded.\r | |
45 | @retval FALSE SHA-256 context initialization failed.\r | |
46 | \r | |
47 | **/\r | |
48 | BOOLEAN\r | |
49 | EFIAPI\r | |
50 | Sha256Init (\r | |
a8c44645 | 51 | OUT VOID *Sha256Context\r |
97f98500 HT |
52 | )\r |
53 | {\r | |
54 | //\r | |
16d2c32c | 55 | // Check input parameters.\r |
97f98500 | 56 | //\r |
16d2c32c | 57 | if (Sha256Context == NULL) {\r |
58 | return FALSE;\r | |
59 | }\r | |
97f98500 HT |
60 | \r |
61 | //\r | |
62 | // OpenSSL SHA-256 Context Initialization\r | |
63 | //\r | |
6b8ebcb8 | 64 | return (BOOLEAN) (SHA256_Init ((SHA256_CTX *) Sha256Context));\r |
97f98500 HT |
65 | }\r |
66 | \r | |
a8c44645 | 67 | /**\r |
68 | Makes a copy of an existing SHA-256 context.\r | |
69 | \r | |
16d2c32c | 70 | If Sha256Context is NULL, then return FALSE.\r |
71 | If NewSha256Context is NULL, then return FALSE.\r | |
a8c44645 | 72 | \r |
73 | @param[in] Sha256Context Pointer to SHA-256 context being copied.\r | |
74 | @param[out] NewSha256Context Pointer to new SHA-256 context.\r | |
75 | \r | |
76 | @retval TRUE SHA-256 context copy succeeded.\r | |
77 | @retval FALSE SHA-256 context copy failed.\r | |
78 | \r | |
79 | **/\r | |
80 | BOOLEAN\r | |
81 | EFIAPI\r | |
82 | Sha256Duplicate (\r | |
83 | IN CONST VOID *Sha256Context,\r | |
84 | OUT VOID *NewSha256Context\r | |
85 | )\r | |
86 | {\r | |
4a567c96 | 87 | //\r |
16d2c32c | 88 | // Check input parameters.\r |
4a567c96 | 89 | //\r |
16d2c32c | 90 | if (Sha256Context == NULL || NewSha256Context == NULL) {\r |
91 | return FALSE;\r | |
92 | }\r | |
4a567c96 | 93 | \r |
a8c44645 | 94 | CopyMem (NewSha256Context, Sha256Context, sizeof (SHA256_CTX));\r |
95 | \r | |
96 | return TRUE;\r | |
97 | }\r | |
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98 | \r |
99 | /**\r | |
a8c44645 | 100 | Digests the input data and updates SHA-256 context.\r |
101 | \r | |
102 | This function performs SHA-256 digest on a data buffer of the specified size.\r | |
103 | It can be called multiple times to compute the digest of long or discontinuous data streams.\r | |
104 | SHA-256 context should be already correctly intialized by Sha256Init(), and should not be finalized\r | |
105 | by Sha256Final(). Behavior with invalid context is undefined.\r | |
97f98500 | 106 | \r |
16d2c32c | 107 | If Sha256Context is NULL, then return FALSE.\r |
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108 | \r |
109 | @param[in, out] Sha256Context Pointer to the SHA-256 context.\r | |
110 | @param[in] Data Pointer to the buffer containing the data to be hashed.\r | |
a8c44645 | 111 | @param[in] DataSize Size of Data buffer in bytes.\r |
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112 | \r |
113 | @retval TRUE SHA-256 data digest succeeded.\r | |
a8c44645 | 114 | @retval FALSE SHA-256 data digest failed.\r |
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115 | \r |
116 | **/\r | |
117 | BOOLEAN\r | |
118 | EFIAPI\r | |
119 | Sha256Update (\r | |
120 | IN OUT VOID *Sha256Context,\r | |
121 | IN CONST VOID *Data,\r | |
a8c44645 | 122 | IN UINTN DataSize\r |
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123 | )\r |
124 | {\r | |
125 | //\r | |
16d2c32c | 126 | // Check input parameters.\r |
97f98500 | 127 | //\r |
16d2c32c | 128 | if (Sha256Context == NULL) {\r |
129 | return FALSE;\r | |
130 | }\r | |
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131 | \r |
132 | //\r | |
16d2c32c | 133 | // Check invalid parameters, in case that only DataLength was checked in OpenSSL\r |
97f98500 | 134 | //\r |
16d2c32c | 135 | if (Data == NULL && DataSize != 0) {\r |
136 | return FALSE;\r | |
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137 | }\r |
138 | \r | |
139 | //\r | |
140 | // OpenSSL SHA-256 Hash Update\r | |
141 | //\r | |
6b8ebcb8 | 142 | return (BOOLEAN) (SHA256_Update ((SHA256_CTX *) Sha256Context, Data, DataSize));\r |
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143 | }\r |
144 | \r | |
97f98500 | 145 | /**\r |
a8c44645 | 146 | Completes computation of the SHA-256 digest value.\r |
147 | \r | |
148 | This function completes SHA-256 hash computation and retrieves the digest value into\r | |
149 | the specified memory. After this function has been called, the SHA-256 context cannot\r | |
150 | be used again.\r | |
151 | SHA-256 context should be already correctly intialized by Sha256Init(), and should not be\r | |
152 | finalized by Sha256Final(). Behavior with invalid SHA-256 context is undefined.\r | |
97f98500 | 153 | \r |
16d2c32c | 154 | If Sha256Context is NULL, then return FALSE.\r |
155 | If HashValue is NULL, then return FALSE.\r | |
97f98500 | 156 | \r |
a8c44645 | 157 | @param[in, out] Sha256Context Pointer to the SHA-256 context.\r |
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158 | @param[out] HashValue Pointer to a buffer that receives the SHA-256 digest\r |
159 | value (32 bytes).\r | |
160 | \r | |
161 | @retval TRUE SHA-256 digest computation succeeded.\r | |
162 | @retval FALSE SHA-256 digest computation failed.\r | |
163 | \r | |
164 | **/\r | |
165 | BOOLEAN\r | |
166 | EFIAPI\r | |
167 | Sha256Final (\r | |
168 | IN OUT VOID *Sha256Context,\r | |
169 | OUT UINT8 *HashValue\r | |
170 | )\r | |
171 | {\r | |
172 | //\r | |
16d2c32c | 173 | // Check input parameters.\r |
97f98500 | 174 | //\r |
16d2c32c | 175 | if (Sha256Context == NULL || HashValue == NULL) {\r |
176 | return FALSE;\r | |
177 | }\r | |
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178 | \r |
179 | //\r | |
180 | // OpenSSL SHA-256 Hash Finalization\r | |
181 | //\r | |
6b8ebcb8 | 182 | return (BOOLEAN) (SHA256_Final (HashValue, (SHA256_CTX *) Sha256Context));\r |
97f98500 | 183 | }\r |