SyoSil ApS UVM Scoreboard  1.0.3.0
md5c.c
1 /* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
2  */
3 
4 /* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
5 rights reserved.
6 
7 License to copy and use this software is granted provided that it
8 is identified as the "RSA Data Security, Inc. MD5 Message-Digest
9 Algorithm" in all material mentioning or referencing this software
10 or this function.
11 
12 License is also granted to make and use derivative works provided
13 that such works are identified as "derived from the RSA Data
14 Security, Inc. MD5 Message-Digest Algorithm" in all material
15 mentioning or referencing the derived work.
16 
17 RSA Data Security, Inc. makes no representations concerning either
18 the merchantability of this software or the suitability of this
19 software for any particular purpose. It is provided "as is"
20 without express or implied warranty of any kind.
21 
22 These notices must be retained in any copies of any part of this
23 documentation and/or software.
24  */
25 
26 #include "global.h"
27 #include "md5.h"
28 
29 /* Constants for MD5Transform routine.
30  */
31 #define S11 7
32 #define S12 12
33 #define S13 17
34 #define S14 22
35 #define S21 5
36 #define S22 9
37 #define S23 14
38 #define S24 20
39 #define S31 4
40 #define S32 11
41 #define S33 16
42 #define S34 23
43 #define S41 6
44 #define S42 10
45 #define S43 15
46 #define S44 21
47 
48 static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
49 static void Encode PROTO_LIST
50  ((unsigned char *, UINT4 *, unsigned int));
51 static void Decode PROTO_LIST
52  ((UINT4 *, unsigned char *, unsigned int));
53 static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
54 static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
55 
56 static unsigned char PADDING[64] = {
57  0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
58  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
59  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
60 };
61 
62 /* F, G, H and I are basic MD5 functions.
63  */
64 #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
65 #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
66 #define H(x, y, z) ((x) ^ (y) ^ (z))
67 #define I(x, y, z) ((y) ^ ((x) | (~z)))
68 
69 /* ROTATE_LEFT rotates x left n bits.
70  */
71 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
72 
73 /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
74 Rotation is separate from addition to prevent recomputation.
75  */
76 #define FF(a, b, c, d, x, s, ac) { \
77  (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
78  (a) = ROTATE_LEFT ((a), (s)); \
79  (a) += (b); \
80  }
81 #define GG(a, b, c, d, x, s, ac) { \
82  (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
83  (a) = ROTATE_LEFT ((a), (s)); \
84  (a) += (b); \
85  }
86 #define HH(a, b, c, d, x, s, ac) { \
87  (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
88  (a) = ROTATE_LEFT ((a), (s)); \
89  (a) += (b); \
90  }
91 #define II(a, b, c, d, x, s, ac) { \
92  (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
93  (a) = ROTATE_LEFT ((a), (s)); \
94  (a) += (b); \
95  }
96 
97 /* MD5 initialization. Begins an MD5 operation, writing a new context.
98  */
99 void MD5Init (context)
100 MD5_CTX *context; /* context */
101 {
102  context->count[0] = context->count[1] = 0;
103  /* Load magic initialization constants.
104 */
105  context->state[0] = 0x67452301;
106  context->state[1] = 0xefcdab89;
107  context->state[2] = 0x98badcfe;
108  context->state[3] = 0x10325476;
109 }
110 
111 /* MD5 block update operation. Continues an MD5 message-digest
112  operation, processing another message block, and updating the
113  context.
114  */
115 void MD5Update (context, input, inputLen)
116 MD5_CTX *context; /* context */
117 unsigned char *input; /* input block */
118 unsigned int inputLen; /* length of input block */
119 {
120  unsigned int i, index, partLen;
121 
122  /* Compute number of bytes mod 64 */
123  index = (unsigned int)((context->count[0] >> 3) & 0x3F);
124 
125  /* Update number of bits */
126  if ((context->count[0] += ((UINT4)inputLen << 3))
127  < ((UINT4)inputLen << 3))
128  context->count[1]++;
129  context->count[1] += ((UINT4)inputLen >> 29);
130 
131  partLen = 64 - index;
132 
133  /* Transform as many times as possible.
134 */
135  if (inputLen >= partLen) {
136  MD5_memcpy
137  ((POINTER)&context->buffer[index], (POINTER)input, partLen);
138  MD5Transform (context->state, context->buffer);
139 
140  for (i = partLen; i + 63 < inputLen; i += 64)
141  MD5Transform (context->state, &input[i]);
142 
143  index = 0;
144  }
145  else
146  i = 0;
147 
148  /* Buffer remaining input */
149  MD5_memcpy
150  ((POINTER)&context->buffer[index], (POINTER)&input[i],
151  inputLen-i);
152 }
153 
154 /* MD5 finalization. Ends an MD5 message-digest operation, writing the
155  the message digest and zeroizing the context.
156  */
157 void MD5Final (digest, context)
158 unsigned char digest[16]; /* message digest */
159 MD5_CTX *context; /* context */
160 {
161  unsigned char bits[8];
162  unsigned int index, padLen;
163 
164  /* Save number of bits */
165  Encode (bits, context->count, 8);
166 
167  /* Pad out to 56 mod 64.
168 */
169  index = (unsigned int)((context->count[0] >> 3) & 0x3f);
170  padLen = (index < 56) ? (56 - index) : (120 - index);
171  MD5Update (context, PADDING, padLen);
172 
173  /* Append length (before padding) */
174  MD5Update (context, bits, 8);
175 
176  /* Store state in digest */
177  Encode (digest, context->state, 16);
178 
179  /* Zeroize sensitive information.
180 */
181  MD5_memset ((POINTER)context, 0, sizeof (*context));
182 }
183 
184 /* MD5 basic transformation. Transforms state based on block.
185  */
186 static void MD5Transform (state, block)
187 UINT4 state[4];
188 unsigned char block[64];
189 {
190  UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
191 
192  Decode (x, block, 64);
193 
194  /* Round 1 */
195 
196  FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
197  FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
198  FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
199  FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
200  FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
201  FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
202  FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
203  FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
204  FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
205  FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
206  FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
207  FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
208  FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
209  FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
210  FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
211  FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
212 
213  /* Round 2 */
214  GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
215  GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
216  GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
217  GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
218  GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
219  GG (d, a, b, c, x[10], S22, 0x02441453); /* 22 */
220  GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
221  GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
222  GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
223  GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
224  GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
225  GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
226  GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
227  GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
228  GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
229  GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
230 
231  /* Round 3 */
232  HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
233  HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
234  HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
235  HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
236  HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
237  HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
238  HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
239  HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
240  HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
241  HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
242  HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
243  HH (b, c, d, a, x[ 6], S34, 0x04881d05); /* 44 */
244  HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
245  HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
246  HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
247  HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
248 
249  /* Round 4 */
250  II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
251  II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
252  II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
253  II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
254  II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
255  II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
256  II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
257  II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
258  II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
259  II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
260  II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
261  II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
262  II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
263  II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
264  II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
265  II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
266 
267 
268  state[0] += a;
269  state[1] += b;
270  state[2] += c;
271  state[3] += d;
272 
273 
274  /* Zeroize sensitive information.
275 */
276  MD5_memset ((POINTER)x, 0, sizeof (x));
277 }
278 
279 /* Encodes input (UINT4) into output (unsigned char). Assumes len is
280  a multiple of 4.
281  */
282 static void Encode (output, input, len)
283 unsigned char *output;
284 UINT4 *input;
285 unsigned int len;
286 {
287  unsigned int i, j;
288 
289  for (i = 0, j = 0; j < len; i++, j += 4) {
290  output[j] = (unsigned char)(input[i] & 0xff);
291  output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
292  output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
293  output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
294  }
295 }
296 
297 /* Decodes input (unsigned char) into output (UINT4). Assumes len is
298  a multiple of 4.
299  */
300 static void Decode (output, input, len)
301 UINT4 *output;
302 unsigned char *input;
303 unsigned int len;
304 {
305  unsigned int i, j;
306 
307  for (i = 0, j = 0; j < len; i++, j += 4)
308  output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
309  (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
310 }
311 
312 /* Note: Replace "for loop" with standard memcpy if possible.
313  */
314 
315 static void MD5_memcpy (output, input, len)
316 POINTER output;
317 POINTER input;
318 unsigned int len;
319 {
320  unsigned int i;
321 
322  for (i = 0; i < len; i++)
323 
324 
325  output[i] = input[i];
326 }
327 
328 /* Note: Replace "for loop" with standard memset if possible.
329  */
330 static void MD5_memset (output, value, len)
331 POINTER output;
332 int value;
333 unsigned int len;
334 {
335  unsigned int i;
336 
337  for (i = 0; i < len; i++)
338  ((char *)output)[i] = (char)value;
339 }

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