1 /* This is a modified version from Aymeric MOIZARD
2 of MD5C.C provided by RSA Data Security, Inc.
3 modification:
4 path for include files
5 */
6
7 /* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
8 */
9
10 /* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
11 rights reserved.
12
13 License to copy and use this software is granted provided that it
14 is identified as the "RSA Data Security, Inc. MD5 Message-Digest
15 Algorithm" in all material mentioning or referencing this software
16 or this function.
17
18 License is also granted to make and use derivative works provided
19 that such works are identified as "derived from the RSA Data
20 Security, Inc. MD5 Message-Digest Algorithm" in all material
21 mentioning or referencing the derived work.
22
23 RSA Data Security, Inc. makes no representations concerning either
24 the merchantability of this software or the suitability of this
25 software for any particular purpose. It is provided "as is"
26 without express or implied warranty of any kind.
27
28 These notices must be retained in any copies of any part of this
29 documentation and/or software.
30 */
31
32 /* modified for oSIP */
33
34 #ifndef NO_MD5_SUPPORT
35
36 #include <osipparser2/osip_md5.h>
37
38 /* Constants for MD5Transform routine.
39 */
40
41 #define S11 7
42 #define S12 12
43 #define S13 17
44 #define S14 22
45 #define S21 5
46 #define S22 9
47 #define S23 14
48 #define S24 20
49 #define S31 4
50 #define S32 11
51 #define S33 16
52 #define S34 23
53 #define S41 6
54 #define S42 10
55 #define S43 15
56 #define S44 21
57
58 static void osip_MD5Transform PROTO_LIST((UINT4[4], unsigned char[64]));
59 static void osip_Encode PROTO_LIST((unsigned char *, UINT4 *, unsigned int) );
60 static void osip_Decode PROTO_LIST((UINT4 *, unsigned char *, unsigned int) );
61 static void osip_MD5_memcpy PROTO_LIST((POINTER, POINTER, unsigned int) );
62 static void osip_MD5_memset PROTO_LIST((POINTER, int, unsigned int) );
63
64 static unsigned char PADDING[64] = {0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
65
66 /* F, G, H and I are basic MD5 functions.
67 */
68 #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
69 #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
70 #define H(x, y, z) ((x) ^ (y) ^ (z))
71 #define I(x, y, z) ((y) ^ ((x) | (~z)))
72
73 /* ROTATE_LEFT rotates x left n bits.
74 */
75 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
76
77 /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
78 Rotation is separate from addition to prevent recomputation.
79 */
80 #define FF(a, b, c, d, x, s, ac) \
81 { \
82 (a) += F((b), (c), (d)) + (x) + (UINT4)(ac); \
83 (a) = ROTATE_LEFT((a), (s)); \
84 (a) += (b); \
85 }
86 #define GG(a, b, c, d, x, s, ac) \
87 { \
88 (a) += G((b), (c), (d)) + (x) + (UINT4)(ac); \
89 (a) = ROTATE_LEFT((a), (s)); \
90 (a) += (b); \
91 }
92 #define HH(a, b, c, d, x, s, ac) \
93 { \
94 (a) += H((b), (c), (d)) + (x) + (UINT4)(ac); \
95 (a) = ROTATE_LEFT((a), (s)); \
96 (a) += (b); \
97 }
98 #define II(a, b, c, d, x, s, ac) \
99 { \
100 (a) += I((b), (c), (d)) + (x) + (UINT4)(ac); \
101 (a) = ROTATE_LEFT((a), (s)); \
102 (a) += (b); \
103 }
104
105 /* MD5 initialization. Begins an MD5 operation, writing a new context.
106 */
osip_MD5Init(osip_MD5_CTX * context)107 void osip_MD5Init(osip_MD5_CTX *context /* context */
108 ) {
109 context->count[0] = context->count[1] = 0;
110 /* Load magic initialization constants.
111 */
112 context->state[0] = 0x67452301;
113 context->state[1] = 0xefcdab89;
114 context->state[2] = 0x98badcfe;
115 context->state[3] = 0x10325476;
116 }
117
118 /* MD5 block update operation. Continues an MD5 message-digest
119 operation, processing another message block, and updating the
120 context.
121 */
osip_MD5Update(osip_MD5_CTX * context,unsigned char * input,unsigned int inputLen)122 void osip_MD5Update(osip_MD5_CTX *context, /* context */
123 unsigned char *input, /* input block */
124 unsigned int inputLen /* length of input block */
125 ) {
126 unsigned int i, index, partLen;
127
128 /* Compute number of bytes mod 64 */
129 index = (unsigned int) ((context->count[0] >> 3) & 0x3F);
130
131 /* Update number of bits */
132 if ((context->count[0] += ((UINT4) inputLen << 3)) < ((UINT4) inputLen << 3))
133 context->count[1]++;
134
135 context->count[1] += ((UINT4) inputLen >> 29);
136
137 partLen = 64 - index;
138
139 /* Transform as many times as possible.
140 */
141 if (inputLen >= partLen) {
142 osip_MD5_memcpy((POINTER) &context->buffer[index], (POINTER) input, partLen);
143 osip_MD5Transform(context->state, context->buffer);
144
145 for (i = partLen; i + 63 < inputLen; i += 64)
146 osip_MD5Transform(context->state, &input[i]);
147
148 index = 0;
149
150 } else
151 i = 0;
152
153 /* Buffer remaining input */
154 osip_MD5_memcpy((POINTER) &context->buffer[index], (POINTER) &input[i], inputLen - i);
155 }
156
157 /* MD5 finalization. Ends an MD5 message-digest operation, writing the
158 the message digest and zeroizing the context.
159 */
osip_MD5Final(unsigned char digest[16],osip_MD5_CTX * context)160 void osip_MD5Final(unsigned char digest[16], /* message digest */
161 osip_MD5_CTX *context /* context */
162 ) {
163 unsigned char bits[8];
164 unsigned int index, padLen;
165
166 /* Save number of bits */
167 osip_Encode(bits, context->count, 8);
168
169 /* Pad out to 56 mod 64.
170 */
171 index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
172 padLen = (index < 56) ? (56 - index) : (120 - index);
173 osip_MD5Update(context, PADDING, padLen);
174
175 /* Append length (before padding) */
176 osip_MD5Update(context, bits, 8);
177
178 /* Store state in digest */
179 osip_Encode(digest, context->state, 16);
180
181 /* Zeroize sensitive information.
182 */
183 osip_MD5_memset((POINTER) context, 0, sizeof(*context));
184 }
185
186 /* MD5 basic transformation. Transforms state based on block.
187 */
osip_MD5Transform(UINT4 state[4],unsigned char block[64])188 static void osip_MD5Transform(UINT4 state[4], unsigned char block[64]) {
189 UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
190
191 osip_Decode(x, block, 64);
192
193 /* Round 1 */
194 FF(a, b, c, d, x[0], S11, 0xd76aa478); /* 1 */
195 FF(d, a, b, c, x[1], S12, 0xe8c7b756); /* 2 */
196 FF(c, d, a, b, x[2], S13, 0x242070db); /* 3 */
197 FF(b, c, d, a, x[3], S14, 0xc1bdceee); /* 4 */
198 FF(a, b, c, d, x[4], S11, 0xf57c0faf); /* 5 */
199 FF(d, a, b, c, x[5], S12, 0x4787c62a); /* 6 */
200 FF(c, d, a, b, x[6], S13, 0xa8304613); /* 7 */
201 FF(b, c, d, a, x[7], S14, 0xfd469501); /* 8 */
202 FF(a, b, c, d, x[8], S11, 0x698098d8); /* 9 */
203 FF(d, a, b, c, x[9], S12, 0x8b44f7af); /* 10 */
204 FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
205 FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
206 FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
207 FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
208 FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
209 FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
210
211 /* Round 2 */
212 GG(a, b, c, d, x[1], S21, 0xf61e2562); /* 17 */
213 GG(d, a, b, c, x[6], S22, 0xc040b340); /* 18 */
214 GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
215 GG(b, c, d, a, x[0], S24, 0xe9b6c7aa); /* 20 */
216 GG(a, b, c, d, x[5], S21, 0xd62f105d); /* 21 */
217 GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
218 GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
219 GG(b, c, d, a, x[4], S24, 0xe7d3fbc8); /* 24 */
220 GG(a, b, c, d, x[9], S21, 0x21e1cde6); /* 25 */
221 GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
222 GG(c, d, a, b, x[3], S23, 0xf4d50d87); /* 27 */
223 GG(b, c, d, a, x[8], S24, 0x455a14ed); /* 28 */
224 GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
225 GG(d, a, b, c, x[2], S22, 0xfcefa3f8); /* 30 */
226 GG(c, d, a, b, x[7], S23, 0x676f02d9); /* 31 */
227 GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
228
229 /* Round 3 */
230 HH(a, b, c, d, x[5], S31, 0xfffa3942); /* 33 */
231 HH(d, a, b, c, x[8], S32, 0x8771f681); /* 34 */
232 HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
233 HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
234 HH(a, b, c, d, x[1], S31, 0xa4beea44); /* 37 */
235 HH(d, a, b, c, x[4], S32, 0x4bdecfa9); /* 38 */
236 HH(c, d, a, b, x[7], S33, 0xf6bb4b60); /* 39 */
237 HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
238 HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
239 HH(d, a, b, c, x[0], S32, 0xeaa127fa); /* 42 */
240 HH(c, d, a, b, x[3], S33, 0xd4ef3085); /* 43 */
241 HH(b, c, d, a, x[6], S34, 0x4881d05); /* 44 */
242 HH(a, b, c, d, x[9], S31, 0xd9d4d039); /* 45 */
243 HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
244 HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
245 HH(b, c, d, a, x[2], S34, 0xc4ac5665); /* 48 */
246
247 /* Round 4 */
248 II(a, b, c, d, x[0], S41, 0xf4292244); /* 49 */
249 II(d, a, b, c, x[7], S42, 0x432aff97); /* 50 */
250 II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
251 II(b, c, d, a, x[5], S44, 0xfc93a039); /* 52 */
252 II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
253 II(d, a, b, c, x[3], S42, 0x8f0ccc92); /* 54 */
254 II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
255 II(b, c, d, a, x[1], S44, 0x85845dd1); /* 56 */
256 II(a, b, c, d, x[8], S41, 0x6fa87e4f); /* 57 */
257 II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
258 II(c, d, a, b, x[6], S43, 0xa3014314); /* 59 */
259 II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
260 II(a, b, c, d, x[4], S41, 0xf7537e82); /* 61 */
261 II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
262 II(c, d, a, b, x[2], S43, 0x2ad7d2bb); /* 63 */
263 II(b, c, d, a, x[9], S44, 0xeb86d391); /* 64 */
264
265 state[0] += a;
266 state[1] += b;
267 state[2] += c;
268 state[3] += d;
269
270 /* Zeroize sensitive information.
271 */
272 osip_MD5_memset((POINTER) x, 0, sizeof(x));
273 }
274
275 /* Encodes input (UINT4) into output (unsigned char). Assumes len is
276 a multiple of 4.
277 */
osip_Encode(unsigned char * output,UINT4 * input,unsigned int len)278 static void osip_Encode(unsigned char *output, UINT4 *input, unsigned int len) {
279 unsigned int i, j;
280
281 for (i = 0, j = 0; j < len; i++, j += 4) {
282 output[j] = (unsigned char) (input[i] & 0xff);
283 output[j + 1] = (unsigned char) ((input[i] >> 8) & 0xff);
284 output[j + 2] = (unsigned char) ((input[i] >> 16) & 0xff);
285 output[j + 3] = (unsigned char) ((input[i] >> 24) & 0xff);
286 }
287 }
288
289 /* Decodes input (unsigned char) into output (UINT4). Assumes len is
290 a multiple of 4.
291 */
osip_Decode(UINT4 * output,unsigned char * input,unsigned int len)292 static void osip_Decode(UINT4 *output, unsigned char *input, unsigned int len) {
293 unsigned int i, j;
294
295 for (i = 0, j = 0; j < len; i++, j += 4)
296 output[i] = ((UINT4) input[j]) | (((UINT4) input[j + 1]) << 8) | (((UINT4) input[j + 2]) << 16) | (((UINT4) input[j + 3]) << 24);
297 }
298
299 /* Note: Replace "for loop" with standard memcpy if possible.
300 */
301
osip_MD5_memcpy(POINTER output,POINTER input,unsigned int len)302 static void osip_MD5_memcpy(POINTER output, POINTER input, unsigned int len) {
303 unsigned int i;
304
305 for (i = 0; i < len; i++)
306 output[i] = input[i];
307 }
308
309 /* Note: Replace "for loop" with standard memset if possible.
310 */
osip_MD5_memset(POINTER output,int value,unsigned int len)311 static void osip_MD5_memset(POINTER output, int value, unsigned int len) {
312 unsigned int i;
313
314 for (i = 0; i < len; i++)
315 ((char *) output)[i] = (char) value;
316 }
317
318 #endif
319