Mercurial > projects > ldc
comparison dmd/md5.c @ 337:d03d748a9b5f trunk
[svn r358] Forgot to add new files from DMD 1.033
author | lindquist |
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date | Sat, 12 Jul 2008 19:40:14 +0200 |
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1 /* | |
2 ********************************************************************** | |
3 ** md5.c ** | |
4 ** RSA Data Security, Inc. MD5 Message Digest Algorithm ** | |
5 ** Created: 2/17/90 RLR ** | |
6 ** Revised: 1/91 SRD,AJ,BSK,JT Reference C Version ** | |
7 ********************************************************************** | |
8 */ | |
9 | |
10 /* | |
11 ********************************************************************** | |
12 ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. ** | |
13 ** ** | |
14 ** License to copy and use this software is granted provided that ** | |
15 ** it is identified as the "RSA Data Security, Inc. MD5 Message ** | |
16 ** Digest Algorithm" in all material mentioning or referencing this ** | |
17 ** software or this function. ** | |
18 ** ** | |
19 ** License is also granted to make and use derivative works ** | |
20 ** provided that such works are identified as "derived from the RSA ** | |
21 ** Data Security, Inc. MD5 Message Digest Algorithm" in all ** | |
22 ** material mentioning or referencing the derived work. ** | |
23 ** ** | |
24 ** RSA Data Security, Inc. makes no representations concerning ** | |
25 ** either the merchantability of this software or the suitability ** | |
26 ** of this software for any particular purpose. It is provided "as ** | |
27 ** is" without express or implied warranty of any kind. ** | |
28 ** ** | |
29 ** These notices must be retained in any copies of any part of this ** | |
30 ** documentation and/or software. ** | |
31 ********************************************************************** | |
32 */ | |
33 | |
34 /* -- include the following line if the md5.h header file is separate -- */ | |
35 #include "md5.h" | |
36 | |
37 /* forward declaration */ | |
38 static void Transform (UINT4 *buf, UINT4 *in); | |
39 | |
40 static unsigned char PADDING[64] = { | |
41 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
42 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
43 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
44 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
45 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
46 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
47 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
48 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 | |
49 }; | |
50 | |
51 /* F, G and H are basic MD5 functions: selection, majority, parity */ | |
52 #define F(x, y, z) (((x) & (y)) | ((~x) & (z))) | |
53 #define G(x, y, z) (((x) & (z)) | ((y) & (~z))) | |
54 #define H(x, y, z) ((x) ^ (y) ^ (z)) | |
55 #define I(x, y, z) ((y) ^ ((x) | (~z))) | |
56 | |
57 /* ROTATE_LEFT rotates x left n bits */ | |
58 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) | |
59 | |
60 /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */ | |
61 /* Rotation is separate from addition to prevent recomputation */ | |
62 #define FF(a, b, c, d, x, s, ac) \ | |
63 {(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \ | |
64 (a) = ROTATE_LEFT ((a), (s)); \ | |
65 (a) += (b); \ | |
66 } | |
67 #define GG(a, b, c, d, x, s, ac) \ | |
68 {(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \ | |
69 (a) = ROTATE_LEFT ((a), (s)); \ | |
70 (a) += (b); \ | |
71 } | |
72 #define HH(a, b, c, d, x, s, ac) \ | |
73 {(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \ | |
74 (a) = ROTATE_LEFT ((a), (s)); \ | |
75 (a) += (b); \ | |
76 } | |
77 #define II(a, b, c, d, x, s, ac) \ | |
78 {(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \ | |
79 (a) = ROTATE_LEFT ((a), (s)); \ | |
80 (a) += (b); \ | |
81 } | |
82 | |
83 void MD5Init (mdContext) | |
84 MD5_CTX *mdContext; | |
85 { | |
86 mdContext->i[0] = mdContext->i[1] = (UINT4)0; | |
87 | |
88 /* Load magic initialization constants. | |
89 */ | |
90 mdContext->buf[0] = (UINT4)0x67452301; | |
91 mdContext->buf[1] = (UINT4)0xefcdab89; | |
92 mdContext->buf[2] = (UINT4)0x98badcfe; | |
93 mdContext->buf[3] = (UINT4)0x10325476; | |
94 } | |
95 | |
96 void MD5Update (mdContext, inBuf, inLen) | |
97 MD5_CTX *mdContext; | |
98 unsigned char *inBuf; | |
99 unsigned int inLen; | |
100 { | |
101 UINT4 in[16]; | |
102 int mdi; | |
103 unsigned int i, ii; | |
104 | |
105 /* compute number of bytes mod 64 */ | |
106 mdi = (int)((mdContext->i[0] >> 3) & 0x3F); | |
107 | |
108 /* update number of bits */ | |
109 if ((mdContext->i[0] + ((UINT4)inLen << 3)) < mdContext->i[0]) | |
110 mdContext->i[1]++; | |
111 mdContext->i[0] += ((UINT4)inLen << 3); | |
112 mdContext->i[1] += ((UINT4)inLen >> 29); | |
113 | |
114 while (inLen--) { | |
115 /* add new character to buffer, increment mdi */ | |
116 mdContext->in[mdi++] = *inBuf++; | |
117 | |
118 /* transform if necessary */ | |
119 if (mdi == 0x40) { | |
120 for (i = 0, ii = 0; i < 16; i++, ii += 4) | |
121 in[i] = (((UINT4)mdContext->in[ii+3]) << 24) | | |
122 (((UINT4)mdContext->in[ii+2]) << 16) | | |
123 (((UINT4)mdContext->in[ii+1]) << 8) | | |
124 ((UINT4)mdContext->in[ii]); | |
125 Transform (mdContext->buf, in); | |
126 mdi = 0; | |
127 } | |
128 } | |
129 } | |
130 | |
131 void MD5Final (mdContext) | |
132 MD5_CTX *mdContext; | |
133 { | |
134 UINT4 in[16]; | |
135 int mdi; | |
136 unsigned int i, ii; | |
137 unsigned int padLen; | |
138 | |
139 /* save number of bits */ | |
140 in[14] = mdContext->i[0]; | |
141 in[15] = mdContext->i[1]; | |
142 | |
143 /* compute number of bytes mod 64 */ | |
144 mdi = (int)((mdContext->i[0] >> 3) & 0x3F); | |
145 | |
146 /* pad out to 56 mod 64 */ | |
147 padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi); | |
148 MD5Update (mdContext, PADDING, padLen); | |
149 | |
150 /* append length in bits and transform */ | |
151 for (i = 0, ii = 0; i < 14; i++, ii += 4) | |
152 in[i] = (((UINT4)mdContext->in[ii+3]) << 24) | | |
153 (((UINT4)mdContext->in[ii+2]) << 16) | | |
154 (((UINT4)mdContext->in[ii+1]) << 8) | | |
155 ((UINT4)mdContext->in[ii]); | |
156 Transform (mdContext->buf, in); | |
157 | |
158 /* store buffer in digest */ | |
159 for (i = 0, ii = 0; i < 4; i++, ii += 4) { | |
160 mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF); | |
161 mdContext->digest[ii+1] = | |
162 (unsigned char)((mdContext->buf[i] >> 8) & 0xFF); | |
163 mdContext->digest[ii+2] = | |
164 (unsigned char)((mdContext->buf[i] >> 16) & 0xFF); | |
165 mdContext->digest[ii+3] = | |
166 (unsigned char)((mdContext->buf[i] >> 24) & 0xFF); | |
167 } | |
168 } | |
169 | |
170 /* Basic MD5 step. Transform buf based on in. | |
171 */ | |
172 static void Transform (buf, in) | |
173 UINT4 *buf; | |
174 UINT4 *in; | |
175 { | |
176 UINT4 a = buf[0], b = buf[1], c = buf[2], d = buf[3]; | |
177 | |
178 /* Round 1 */ | |
179 #define S11 7 | |
180 #define S12 12 | |
181 #define S13 17 | |
182 #define S14 22 | |
183 FF ( a, b, c, d, in[ 0], S11, 3614090360); /* 1 */ | |
184 FF ( d, a, b, c, in[ 1], S12, 3905402710); /* 2 */ | |
185 FF ( c, d, a, b, in[ 2], S13, 606105819); /* 3 */ | |
186 FF ( b, c, d, a, in[ 3], S14, 3250441966); /* 4 */ | |
187 FF ( a, b, c, d, in[ 4], S11, 4118548399); /* 5 */ | |
188 FF ( d, a, b, c, in[ 5], S12, 1200080426); /* 6 */ | |
189 FF ( c, d, a, b, in[ 6], S13, 2821735955); /* 7 */ | |
190 FF ( b, c, d, a, in[ 7], S14, 4249261313); /* 8 */ | |
191 FF ( a, b, c, d, in[ 8], S11, 1770035416); /* 9 */ | |
192 FF ( d, a, b, c, in[ 9], S12, 2336552879); /* 10 */ | |
193 FF ( c, d, a, b, in[10], S13, 4294925233); /* 11 */ | |
194 FF ( b, c, d, a, in[11], S14, 2304563134); /* 12 */ | |
195 FF ( a, b, c, d, in[12], S11, 1804603682); /* 13 */ | |
196 FF ( d, a, b, c, in[13], S12, 4254626195); /* 14 */ | |
197 FF ( c, d, a, b, in[14], S13, 2792965006); /* 15 */ | |
198 FF ( b, c, d, a, in[15], S14, 1236535329); /* 16 */ | |
199 | |
200 /* Round 2 */ | |
201 #define S21 5 | |
202 #define S22 9 | |
203 #define S23 14 | |
204 #define S24 20 | |
205 GG ( a, b, c, d, in[ 1], S21, 4129170786); /* 17 */ | |
206 GG ( d, a, b, c, in[ 6], S22, 3225465664); /* 18 */ | |
207 GG ( c, d, a, b, in[11], S23, 643717713); /* 19 */ | |
208 GG ( b, c, d, a, in[ 0], S24, 3921069994); /* 20 */ | |
209 GG ( a, b, c, d, in[ 5], S21, 3593408605); /* 21 */ | |
210 GG ( d, a, b, c, in[10], S22, 38016083); /* 22 */ | |
211 GG ( c, d, a, b, in[15], S23, 3634488961); /* 23 */ | |
212 GG ( b, c, d, a, in[ 4], S24, 3889429448); /* 24 */ | |
213 GG ( a, b, c, d, in[ 9], S21, 568446438); /* 25 */ | |
214 GG ( d, a, b, c, in[14], S22, 3275163606); /* 26 */ | |
215 GG ( c, d, a, b, in[ 3], S23, 4107603335); /* 27 */ | |
216 GG ( b, c, d, a, in[ 8], S24, 1163531501); /* 28 */ | |
217 GG ( a, b, c, d, in[13], S21, 2850285829); /* 29 */ | |
218 GG ( d, a, b, c, in[ 2], S22, 4243563512); /* 30 */ | |
219 GG ( c, d, a, b, in[ 7], S23, 1735328473); /* 31 */ | |
220 GG ( b, c, d, a, in[12], S24, 2368359562); /* 32 */ | |
221 | |
222 /* Round 3 */ | |
223 #define S31 4 | |
224 #define S32 11 | |
225 #define S33 16 | |
226 #define S34 23 | |
227 HH ( a, b, c, d, in[ 5], S31, 4294588738); /* 33 */ | |
228 HH ( d, a, b, c, in[ 8], S32, 2272392833); /* 34 */ | |
229 HH ( c, d, a, b, in[11], S33, 1839030562); /* 35 */ | |
230 HH ( b, c, d, a, in[14], S34, 4259657740); /* 36 */ | |
231 HH ( a, b, c, d, in[ 1], S31, 2763975236); /* 37 */ | |
232 HH ( d, a, b, c, in[ 4], S32, 1272893353); /* 38 */ | |
233 HH ( c, d, a, b, in[ 7], S33, 4139469664); /* 39 */ | |
234 HH ( b, c, d, a, in[10], S34, 3200236656); /* 40 */ | |
235 HH ( a, b, c, d, in[13], S31, 681279174); /* 41 */ | |
236 HH ( d, a, b, c, in[ 0], S32, 3936430074); /* 42 */ | |
237 HH ( c, d, a, b, in[ 3], S33, 3572445317); /* 43 */ | |
238 HH ( b, c, d, a, in[ 6], S34, 76029189); /* 44 */ | |
239 HH ( a, b, c, d, in[ 9], S31, 3654602809); /* 45 */ | |
240 HH ( d, a, b, c, in[12], S32, 3873151461); /* 46 */ | |
241 HH ( c, d, a, b, in[15], S33, 530742520); /* 47 */ | |
242 HH ( b, c, d, a, in[ 2], S34, 3299628645); /* 48 */ | |
243 | |
244 /* Round 4 */ | |
245 #define S41 6 | |
246 #define S42 10 | |
247 #define S43 15 | |
248 #define S44 21 | |
249 II ( a, b, c, d, in[ 0], S41, 4096336452); /* 49 */ | |
250 II ( d, a, b, c, in[ 7], S42, 1126891415); /* 50 */ | |
251 II ( c, d, a, b, in[14], S43, 2878612391); /* 51 */ | |
252 II ( b, c, d, a, in[ 5], S44, 4237533241); /* 52 */ | |
253 II ( a, b, c, d, in[12], S41, 1700485571); /* 53 */ | |
254 II ( d, a, b, c, in[ 3], S42, 2399980690); /* 54 */ | |
255 II ( c, d, a, b, in[10], S43, 4293915773); /* 55 */ | |
256 II ( b, c, d, a, in[ 1], S44, 2240044497); /* 56 */ | |
257 II ( a, b, c, d, in[ 8], S41, 1873313359); /* 57 */ | |
258 II ( d, a, b, c, in[15], S42, 4264355552); /* 58 */ | |
259 II ( c, d, a, b, in[ 6], S43, 2734768916); /* 59 */ | |
260 II ( b, c, d, a, in[13], S44, 1309151649); /* 60 */ | |
261 II ( a, b, c, d, in[ 4], S41, 4149444226); /* 61 */ | |
262 II ( d, a, b, c, in[11], S42, 3174756917); /* 62 */ | |
263 II ( c, d, a, b, in[ 2], S43, 718787259); /* 63 */ | |
264 II ( b, c, d, a, in[ 9], S44, 3951481745); /* 64 */ | |
265 | |
266 buf[0] += a; | |
267 buf[1] += b; | |
268 buf[2] += c; | |
269 buf[3] += d; | |
270 } | |
271 | |
272 /* | |
273 ********************************************************************** | |
274 ** End of md5.c ** | |
275 ******************************* (cut) ******************************** | |
276 */ | |
277 |