1 /** @file md5.c
2 *
3 * @brief This file defines the function for md5
4 *
5 * Copyright (C) 2014-2017, Marvell International Ltd.
6 *
7 * This software file (the "File") is distributed by Marvell International
8 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
9 * (the "License"). You may use, redistribute and/or modify this File in
10 * accordance with the terms and conditions of the License, a copy of which
11 * is available by writing to the Free Software Foundation, Inc.,
12 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
13 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
14 *
15 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
17 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
18 * this warranty disclaimer.
19 */
20
21 /******************************************************
22 Change log:
23 03/07/2014: Initial version
24 ******************************************************/
25 #include "wltypes.h"
26 #include "md5.h"
27
28 #include "hostsa_ext_def.h"
29 #include "authenticator.h"
30
31 /* Constants for wpa_MD5Transform routine.
32 */
33 #define S11 7
34 #define S12 12
35 #define S13 17
36 #define S14 22
37 #define S21 5
38 #define S22 9
39 #define S23 14
40 #define S24 20
41 #define S31 4
42 #define S32 11
43 #define S33 16
44 #define S34 23
45 #define S41 6
46 #define S42 10
47 #define S43 15
48 #define S44 21
49
50 #define Mrvl_MD5_memcpy(utils, output, input, len) memcpy(utils, output, input, len)
51 #define Mrvl_MD5_memset(utils, output, value, len) memset(utils, output, value, len)
52 #define Encode(utils, output, input, len) memcpy(utils, output, input, len)
53
54 static void wpa_MD5Transform(void *priv, UINT32 *state, unsigned int *block);
55
56 static const unsigned char PADDING[64] = {
57 0x80, 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,
59 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
60 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
61 };
62
63 /* F, G, H and I are basic MD5 functions.
64 */
65 #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
66 #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
67 #define H(x, y, z) ((x) ^ (y) ^ (z))
68 #define I(x, y, z) ((y) ^ ((x) | (~z)))
69
70 /* ROTATE_LEFT rotates x left n bits.
71 */
72 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
73
74 /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
75 Rotation is separate from addition to prevent recomputation.
76 */
77 #define FF(a, b, c, d, x, s, ac) { \
78 (a) += F ((b), (c), (d)) + (x) + (UINT32)(ac); \
79 (a) = ROTATE_LEFT ((a), (s)); \
80 (a) += (b);}
81
82 #define GG(a, b, c, d, x, s, ac) { \
83 (a) += G ((b), (c), (d)) + (x) + (UINT32)(ac); \
84 (a) = ROTATE_LEFT ((a), (s)); \
85 (a) += (b); \
86 }
87 #define HH(a, b, c, d, x, s, ac) { \
88 (a) += H ((b), (c), (d)) + (x) + (UINT32)(ac); \
89 (a) = ROTATE_LEFT ((a), (s)); \
90 (a) += (b); \
91 }
92 #define II(a, b, c, d, x, s, ac) { \
93 (a) += I ((b), (c), (d)) + (x) + (UINT32)(ac); \
94 (a) = ROTATE_LEFT ((a), (s)); \
95 (a) += (b); \
96 }
97
98 /* MD5 initialization. Begins an MD5 operation, writing a new context.
99 */
100 void
wpa_MD5Init(Mrvl_MD5_CTX * context)101 wpa_MD5Init(Mrvl_MD5_CTX *context)
102 {
103 context->count[0] = context->count[1] = 0;
104 /* Load magic initialization constants. */
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
wpa_MD5Update(void * priv,Mrvl_MD5_CTX * context,UINT8 * input,UINT32 inputLen)116 wpa_MD5Update(void *priv, Mrvl_MD5_CTX *context, UINT8 *input, UINT32 inputLen)
117 {
118 phostsa_private psapriv = (phostsa_private)priv;
119 hostsa_util_fns *util_fns = &psapriv->util_fns;
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] += ((UINT32)inputLen << 3))
127 < ((UINT32)inputLen << 3)) {
128 context->count[1]++;
129 }
130 context->count[1] += ((UINT32)inputLen >> 29);
131
132 partLen = 64 - index;
133
134 /* Transform as many times as possible. */
135 if (inputLen >= partLen) {
136 Mrvl_MD5_memcpy(util_fns, &context->buffer[index], input,
137 partLen);
138 wpa_MD5Transform((void *)priv, context->state,
139 (UINT32 *)context->buffer);
140
141 for (i = partLen; i + 63 < inputLen; i += 64) {
142 Mrvl_MD5_memcpy(util_fns, context->scratch, (input + i),
143 64);
144 wpa_MD5Transform((void *)priv, context->state,
145 context->scratch);
146 }
147 index = 0;
148 } else {
149 i = 0;
150 }
151
152 /* Buffer remaining input */
153 Mrvl_MD5_memcpy(util_fns, &context->buffer[index], &input[i],
154 inputLen - i);
155 }
156
157 /* MD5 finalization. Ends an MD5 message-digest operation, writing the
158 the message digest and zeroizing the context.
159 */
160 void
wpa_MD5Final(void * priv,unsigned char digest[16],Mrvl_MD5_CTX * context)161 wpa_MD5Final(void *priv, unsigned char digest[16], Mrvl_MD5_CTX *context)
162 {
163 phostsa_private psapriv = (phostsa_private)priv;
164 hostsa_util_fns *util_fns = &psapriv->util_fns;
165 unsigned char bits[8];
166 unsigned int index, padLen;
167
168 /* Save number of bits */
169 Encode(util_fns, bits, context->count, 8);
170
171 /* Pad out to 56 mod 64. */
172 index = (unsigned int)((context->count[0] >> 3) & 0x3f);
173 padLen = (index < 56) ? (56 - index) : (120 - index);
174 wpa_MD5Update(priv, context, (UINT8 *)PADDING, padLen);
175
176 /* Append length (before padding) */
177 wpa_MD5Update(priv, context, bits, 8);
178
179 /* Store state in digest */
180 Encode(util_fns, digest, context->state, 16);
181
182 /* Zeroize sensitive information. */
183 Mrvl_MD5_memset(util_fns, context, 0, sizeof(*context));
184 }
185
186 /* MD5 basic transformation. Transforms state based on block.
187 */
188 static void
wpa_MD5Transform(void * priv,UINT32 * state,unsigned int * block)189 wpa_MD5Transform(void *priv, UINT32 *state, unsigned int *block)
190 {
191 phostsa_private psapriv = (phostsa_private)priv;
192 hostsa_util_fns *util_fns = &psapriv->util_fns;
193 UINT32 a = state[0], b = state[1], c = state[2], d = state[3], *x;
194
195 /* Decode (x, block, 64); */
196 x = block;
197
198 /* Round 1 */
199 FF(a, b, c, d, x[0], S11, 0xd76aa478); /* 1 */
200 FF(d, a, b, c, x[1], S12, 0xe8c7b756); /* 2 */
201 FF(c, d, a, b, x[2], S13, 0x242070db); /* 3 */
202 FF(b, c, d, a, x[3], S14, 0xc1bdceee); /* 4 */
203 FF(a, b, c, d, x[4], S11, 0xf57c0faf); /* 5 */
204 FF(d, a, b, c, x[5], S12, 0x4787c62a); /* 6 */
205 FF(c, d, a, b, x[6], S13, 0xa8304613); /* 7 */
206 FF(b, c, d, a, x[7], S14, 0xfd469501); /* 8 */
207 FF(a, b, c, d, x[8], S11, 0x698098d8); /* 9 */
208 FF(d, a, b, c, x[9], S12, 0x8b44f7af); /* 10 */
209 FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
210 FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
211 FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
212 FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
213 FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
214 FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
215
216 /* Round 2 */
217 GG(a, b, c, d, x[1], S21, 0xf61e2562); /* 17 */
218 GG(d, a, b, c, x[6], S22, 0xc040b340); /* 18 */
219 GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
220 GG(b, c, d, a, x[0], S24, 0xe9b6c7aa); /* 20 */
221 GG(a, b, c, d, x[5], S21, 0xd62f105d); /* 21 */
222 GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
223 GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
224 GG(b, c, d, a, x[4], S24, 0xe7d3fbc8); /* 24 */
225 GG(a, b, c, d, x[9], S21, 0x21e1cde6); /* 25 */
226 GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
227 GG(c, d, a, b, x[3], S23, 0xf4d50d87); /* 27 */
228
229 GG(b, c, d, a, x[8], S24, 0x455a14ed); /* 28 */
230 GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
231 GG(d, a, b, c, x[2], S22, 0xfcefa3f8); /* 30 */
232 GG(c, d, a, b, x[7], S23, 0x676f02d9); /* 31 */
233 GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
234
235 /* Round 3 */
236 HH(a, b, c, d, x[5], S31, 0xfffa3942); /* 33 */
237 HH(d, a, b, c, x[8], S32, 0x8771f681); /* 34 */
238 HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
239 HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
240 HH(a, b, c, d, x[1], S31, 0xa4beea44); /* 37 */
241 HH(d, a, b, c, x[4], S32, 0x4bdecfa9); /* 38 */
242 HH(c, d, a, b, x[7], S33, 0xf6bb4b60); /* 39 */
243 HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
244 HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
245 HH(d, a, b, c, x[0], S32, 0xeaa127fa); /* 42 */
246 HH(c, d, a, b, x[3], S33, 0xd4ef3085); /* 43 */
247 HH(b, c, d, a, x[6], S34, 0x4881d05); /* 44 */
248 HH(a, b, c, d, x[9], S31, 0xd9d4d039); /* 45 */
249 HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
250 HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
251 HH(b, c, d, a, x[2], S34, 0xc4ac5665); /* 48 */
252
253 /* Round 4 */
254 II(a, b, c, d, x[0], S41, 0xf4292244); /* 49 */
255 II(d, a, b, c, x[7], S42, 0x432aff97); /* 50 */
256 II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
257 II(b, c, d, a, x[5], S44, 0xfc93a039); /* 52 */
258 II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
259 II(d, a, b, c, x[3], S42, 0x8f0ccc92); /* 54 */
260 II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
261 II(b, c, d, a, x[1], S44, 0x85845dd1); /* 56 */
262 II(a, b, c, d, x[8], S41, 0x6fa87e4f); /* 57 */
263 II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
264 II(c, d, a, b, x[6], S43, 0xa3014314); /* 59 */
265 II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
266 II(a, b, c, d, x[4], S41, 0xf7537e82); /* 61 */
267 II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
268 II(c, d, a, b, x[2], S43, 0x2ad7d2bb); /* 63 */
269 II(b, c, d, a, x[9], S44, 0xeb86d391); /* 64 */
270 state[0] += a;
271 state[1] += b;
272 state[2] += c;
273 state[3] += d;
274
275 /* Zeroize sensitive information. */
276 Mrvl_MD5_memset(util_fns, x, 0, sizeof(x));
277 }
278