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12618416 | 1 | /** @file\r |
2 | Implementation of MD5 algorithm\r | |
6a690e23 | 3 | \r |
12618416 | 4 | Copyright (c) 2004 - 2008, Intel Corporation\r |
7a444476 | 5 | All rights reserved. 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 | |
6a690e23 | 12 | \r |
13 | Module Name:\r | |
14 | \r | |
15 | Md5.c\r | |
16 | \r | |
17 | Abstract:\r | |
18 | \r | |
19 | Implementation of MD5 algorithm\r | |
20 | \r | |
12618416 | 21 | **/\r |
6a690e23 | 22 | \r |
23 | #include "Md5.h"\r | |
24 | \r | |
fe1e36e5 | 25 | CONST UINT32 MD5_K[][2] = {\r |
6a690e23 | 26 | { 0, 1 },\r |
27 | { 1, 5 },\r | |
28 | { 5, 3 },\r | |
29 | { 0, 7 }\r | |
30 | };\r | |
31 | \r | |
fe1e36e5 | 32 | CONST UINT32 MD5_S[][4] = {\r |
6a690e23 | 33 | { 7, 22, 17, 12 },\r |
34 | { 5, 20, 14, 9 },\r | |
35 | { 4, 23, 16 ,11 },\r | |
36 | { 6, 21, 15, 10 },\r | |
37 | };\r | |
38 | \r | |
fe1e36e5 | 39 | CONST UINT32 MD5_T[] = {\r |
6a690e23 | 40 | 0xD76AA478, 0xE8C7B756, 0x242070DB, 0xC1BDCEEE,\r |
41 | 0xF57C0FAF, 0x4787C62A, 0xA8304613, 0xFD469501,\r | |
42 | 0x698098D8, 0x8B44F7AF, 0xFFFF5BB1, 0x895CD7BE,\r | |
43 | 0x6B901122, 0xFD987193, 0xA679438E, 0x49B40821,\r | |
44 | 0xF61E2562, 0xC040B340, 0x265E5A51, 0xE9B6C7AA,\r | |
45 | 0xD62F105D, 0x02441453, 0xD8A1E681, 0xE7D3FBC8,\r | |
46 | 0x21E1CDE6, 0xC33707D6, 0xF4D50D87, 0x455A14ED,\r | |
47 | 0xA9E3E905, 0xFCEFA3F8, 0x676F02D9, 0x8D2A4C8A,\r | |
48 | 0xFFFA3942, 0x8771F681, 0x6D9D6122, 0xFDE5380C,\r | |
49 | 0xA4BEEA44, 0x4BDECFA9, 0xF6BB4B60, 0xBEBFBC70,\r | |
50 | 0x289B7EC6, 0xEAA127FA, 0xD4EF3085, 0x04881D05,\r | |
51 | 0xD9D4D039, 0xE6DB99E5, 0x1FA27CF8, 0xC4AC5665,\r | |
52 | 0xF4292244, 0x432AFF97, 0xAB9423A7, 0xFC93A039,\r | |
53 | 0x655B59C3, 0x8F0CCC92, 0xFFEFF47D, 0x85845DD1,\r | |
54 | 0x6FA87E4F, 0xFE2CE6E0, 0xA3014314, 0x4E0811A1,\r | |
55 | 0xF7537E82, 0xBD3AF235, 0x2AD7D2BB, 0xEB86D391\r | |
56 | };\r | |
57 | \r | |
fe1e36e5 | 58 | CONST UINT8 Md5HashPadding[] =\r |
6a690e23 | 59 | {\r |
60 | 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
61 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
62 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
63 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
64 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
65 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
66 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
67 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
68 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \r | |
69 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
70 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
71 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
72 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
73 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
74 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\r | |
75 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 \r | |
76 | };\r | |
77 | \r | |
78 | //\r | |
79 | // ROTATE_LEFT rotates x left n bits.\r | |
80 | //\r | |
81 | #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32 - (n))))\r | |
82 | \r | |
83 | #define SA S[j & 3]\r | |
84 | #define SB S[(j + 1) & 3]\r | |
85 | #define SC S[(j + 2) & 3]\r | |
86 | #define SD S[(j + 3) & 3]\r | |
87 | \r | |
88 | //\r | |
89 | // TF1, TF2, TF3, TF4 are basic MD5 transform functions\r | |
90 | //\r | |
91 | UINT32 TF1 (UINT32 A, UINT32 B, UINT32 C)\r | |
92 | {\r | |
93 | return (A & B) | (~A & C);\r | |
94 | }\r | |
95 | \r | |
96 | UINT32 TF2 (UINT32 A, UINT32 B, UINT32 C)\r | |
97 | {\r | |
98 | return (A & C) | (B & ~C);\r | |
99 | }\r | |
100 | \r | |
101 | UINT32 TF3 (UINT32 A, UINT32 B, UINT32 C)\r | |
102 | {\r | |
103 | return A ^ B ^ C;\r | |
104 | }\r | |
105 | \r | |
106 | UINT32 TF4 (UINT32 A, UINT32 B, UINT32 C)\r | |
107 | {\r | |
108 | return B ^ (A | ~C);\r | |
109 | }\r | |
110 | \r | |
111 | typedef\r | |
112 | UINT32\r | |
113 | (*MD5_TRANSFORM_FUNC) (\r | |
114 | IN UINT32 A,\r | |
115 | IN UINT32 B,\r | |
116 | IN UINT32 C\r | |
117 | );\r | |
118 | \r | |
fe1e36e5 | 119 | CONST MD5_TRANSFORM_FUNC MD5_F[] = {\r |
6a690e23 | 120 | TF1,\r |
121 | TF2,\r | |
122 | TF3,\r | |
123 | TF4\r | |
124 | };\r | |
125 | \r | |
12618416 | 126 | /**\r |
127 | Perform the MD5 transform on 64 bytes data segment\r | |
128 | \r | |
129 | @param Md5Ctx[in] it includes the data segment for Md5 transform\r | |
130 | \r | |
131 | @retval NONE.\r | |
132 | \r | |
133 | **/\r | |
6a690e23 | 134 | VOID\r |
135 | MD5Transform (\r | |
136 | IN MD5_CTX *Md5Ctx\r | |
137 | )\r | |
6a690e23 | 138 | {\r |
139 | UINT32 i;\r | |
140 | UINT32 j;\r | |
141 | UINT32 S[MD5_HASHSIZE >> 2];\r | |
142 | UINT32 *X;\r | |
143 | UINT32 k;\r | |
144 | UINT32 t;\r | |
145 | \r | |
146 | X = (UINT32 *) Md5Ctx->M;\r | |
147 | \r | |
148 | //\r | |
149 | // Copy MD5 states to S\r | |
150 | //\r | |
e48e37fc | 151 | CopyMem (S, Md5Ctx->States, MD5_HASHSIZE);\r |
6a690e23 | 152 | \r |
153 | t = 0;\r | |
154 | for (i = 0; i < 4; i++) {\r | |
155 | k = MD5_K[i][0];\r | |
156 | for (j = 16; j > 0; j--) {\r | |
157 | SA += (*MD5_F[i]) (SB, SC, SD) + X[k] + MD5_T[t];\r | |
158 | SA = ROTATE_LEFT (SA, MD5_S[i][j & 3]);\r | |
159 | SA += SB;\r | |
160 | \r | |
161 | k += MD5_K[i][1];\r | |
162 | k &= 15;\r | |
163 | \r | |
164 | t++;\r | |
165 | }\r | |
166 | }\r | |
167 | \r | |
168 | for (i = 0; i < 4; i++) {\r | |
169 | Md5Ctx->States[i] += S[i];\r | |
170 | }\r | |
171 | }\r | |
172 | \r | |
12618416 | 173 | /**\r |
174 | Copy data segment into the M field of MD5_CTX structure for later transform.\r | |
175 | If the length of data segment is larger than 64 bytes, then does the transform\r | |
176 | immediately and the generated Md5 code is stored in the States field of MD5_CTX\r | |
177 | data struct for later accumulation. \r | |
178 | All of Md5 code generated for the sequential 64-bytes data segaments are be\r | |
179 | accumulated in MD5Final() function.\r | |
180 | \r | |
181 | @param Md5Ctx[in] the data structure of storing the original data\r | |
182 | segment and the final result.\r | |
183 | \r | |
184 | @param Data[in] the data wanted to be transformed\r | |
185 | \r | |
186 | @param DataLen[in] the length of data\r | |
187 | \r | |
188 | @retval NONE.\r | |
189 | **/\r | |
6a690e23 | 190 | VOID\r |
191 | MD5UpdateBlock (\r | |
192 | IN MD5_CTX *Md5Ctx,\r | |
193 | IN CONST UINT8 *Data,\r | |
194 | IN UINTN DataLen\r | |
195 | )\r | |
6a690e23 | 196 | {\r |
197 | UINTN Limit;\r | |
198 | \r | |
199 | for (Limit = 64 - Md5Ctx->Count; DataLen >= 64 - Md5Ctx->Count; Limit = 64) {\r | |
e48e37fc | 200 | CopyMem (Md5Ctx->M + Md5Ctx->Count, (VOID *)Data, Limit);\r |
6a690e23 | 201 | MD5Transform (Md5Ctx);\r |
202 | \r | |
203 | Md5Ctx->Count = 0;\r | |
204 | Data += Limit;\r | |
205 | DataLen -= Limit;\r | |
206 | }\r | |
207 | \r | |
e48e37fc | 208 | CopyMem (Md5Ctx->M + Md5Ctx->Count, (VOID *)Data, DataLen);\r |
6a690e23 | 209 | Md5Ctx->Count += DataLen;\r |
210 | }\r | |
211 | \r | |
12618416 | 212 | /**\r |
213 | Initialize four 32-bits chaining variables and use them to do the Md5 transform.\r | |
214 | \r | |
215 | @param Md5Ctx[in] the data structure of Md5\r | |
216 | \r | |
217 | @retval EFI_SUCCESS initialization is ok\r | |
218 | \r | |
219 | **/\r | |
6a690e23 | 220 | EFI_STATUS\r |
221 | MD5Init (\r | |
222 | IN MD5_CTX *Md5Ctx\r | |
223 | )\r | |
6a690e23 | 224 | {\r |
e48e37fc | 225 | ZeroMem (Md5Ctx, sizeof (*Md5Ctx));\r |
6a690e23 | 226 | \r |
227 | //\r | |
228 | // Set magic initialization constants.\r | |
229 | //\r | |
230 | Md5Ctx->States[0] = 0x67452301;\r | |
231 | Md5Ctx->States[1] = 0xefcdab89;\r | |
232 | Md5Ctx->States[2] = 0x98badcfe;\r | |
233 | Md5Ctx->States[3] = 0x10325476; \r | |
234 | \r | |
235 | return EFI_SUCCESS;\r | |
236 | }\r | |
237 | \r | |
12618416 | 238 | /**\r |
239 | the external interface of Md5 algorithm\r | |
240 | \r | |
241 | @param Md5Ctx[in] the data structure of storing the original data\r | |
242 | segment and the final result.\r | |
243 | \r | |
244 | @param Data[in] the data wanted to be transformed.\r | |
245 | \r | |
246 | @param DataLen[in] the length of data.\r | |
247 | \r | |
248 | @retval EFI_SUCCESS the transform is ok.\r | |
249 | \r | |
250 | **/\r | |
6a690e23 | 251 | EFI_STATUS\r |
252 | MD5Update (\r | |
253 | IN MD5_CTX *Md5Ctx,\r | |
254 | IN VOID *Data,\r | |
255 | IN UINTN DataLen\r | |
256 | )\r | |
6a690e23 | 257 | {\r |
258 | if (EFI_ERROR (Md5Ctx->Status)) {\r | |
259 | return Md5Ctx->Status;\r | |
260 | }\r | |
261 | \r | |
262 | MD5UpdateBlock (Md5Ctx, (CONST UINT8 *) Data, DataLen);\r | |
263 | Md5Ctx->Length += DataLen;\r | |
264 | return EFI_SUCCESS;\r | |
265 | }\r | |
266 | \r | |
12618416 | 267 | /**\r |
268 | accumulate the MD5 value of every data segment and generate the finial\r | |
269 | result according to MD5 algorithm\r | |
270 | \r | |
271 | @param Md5Ctx[in] the data structure of storing the original data\r | |
272 | segment and the final result.\r | |
273 | \r | |
274 | @param HashVal[out] the final 128-bits output.\r | |
275 | \r | |
276 | @retval EFI_SUCCESS the transform is ok.\r | |
277 | \r | |
278 | **/\r | |
6a690e23 | 279 | EFI_STATUS\r |
280 | MD5Final (\r | |
281 | IN MD5_CTX *Md5Ctx,\r | |
282 | OUT UINT8 *HashVal\r | |
283 | )\r | |
6a690e23 | 284 | {\r |
285 | UINTN PadLength;\r | |
286 | \r | |
287 | if (Md5Ctx->Status == EFI_ALREADY_STARTED) {\r | |
288 | //\r | |
289 | // Store Hashed value & Zeroize sensitive context information.\r | |
290 | //\r | |
e48e37fc | 291 | CopyMem (HashVal, (UINT8 *) Md5Ctx->States, MD5_HASHSIZE);\r |
292 | ZeroMem ((UINT8 *)Md5Ctx, sizeof (*Md5Ctx));\r | |
6a690e23 | 293 | \r |
294 | return EFI_SUCCESS;\r | |
295 | }\r | |
296 | \r | |
297 | if (EFI_ERROR (Md5Ctx->Status)) {\r | |
298 | return Md5Ctx->Status;\r | |
299 | }\r | |
300 | \r | |
301 | PadLength = Md5Ctx->Count >= 56 ? 120 : 56;\r | |
302 | PadLength -= Md5Ctx->Count;\r | |
303 | MD5UpdateBlock (Md5Ctx, Md5HashPadding, PadLength);\r | |
304 | Md5Ctx->Length = LShiftU64 (Md5Ctx->Length, 3);\r | |
305 | MD5UpdateBlock (Md5Ctx, (CONST UINT8 *) &Md5Ctx->Length, 8);\r | |
306 | \r | |
e48e37fc | 307 | ZeroMem (Md5Ctx->M, sizeof (Md5Ctx->M));\r |
6a690e23 | 308 | Md5Ctx->Length = 0;\r |
309 | Md5Ctx->Status = EFI_ALREADY_STARTED;\r | |
310 | return MD5Final (Md5Ctx, HashVal);\r | |
311 | }\r | |
312 | \r |