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28#ifndef USE_HOSTCC
29#include <common.h>
30#include <linux/string.h>
31#else
32#include <string.h>
33#endif
34#include <watchdog.h>
35#include <linux/types.h>
36#include <u-boot/md5.h>
37
38static void
39MD5Transform(__u32 buf[4], __u32 const in[16]);
40
41
42
43
44static void
45byteReverse(unsigned char *buf, unsigned longs)
46{
47 __u32 t;
48 do {
49 t = (__u32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
50 ((unsigned) buf[1] << 8 | buf[0]);
51 *(__u32 *) buf = t;
52 buf += 4;
53 } while (--longs);
54}
55
56
57
58
59
60static void
61MD5Init(struct MD5Context *ctx)
62{
63 ctx->buf[0] = 0x67452301;
64 ctx->buf[1] = 0xefcdab89;
65 ctx->buf[2] = 0x98badcfe;
66 ctx->buf[3] = 0x10325476;
67
68 ctx->bits[0] = 0;
69 ctx->bits[1] = 0;
70}
71
72
73
74
75
76static void
77MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len)
78{
79 register __u32 t;
80
81
82
83 t = ctx->bits[0];
84 if ((ctx->bits[0] = t + ((__u32) len << 3)) < t)
85 ctx->bits[1]++;
86 ctx->bits[1] += len >> 29;
87
88 t = (t >> 3) & 0x3f;
89
90
91
92 if (t) {
93 unsigned char *p = (unsigned char *) ctx->in + t;
94
95 t = 64 - t;
96 if (len < t) {
97 memmove(p, buf, len);
98 return;
99 }
100 memmove(p, buf, t);
101 byteReverse(ctx->in, 16);
102 MD5Transform(ctx->buf, (__u32 *) ctx->in);
103 buf += t;
104 len -= t;
105 }
106
107
108 while (len >= 64) {
109 memmove(ctx->in, buf, 64);
110 byteReverse(ctx->in, 16);
111 MD5Transform(ctx->buf, (__u32 *) ctx->in);
112 buf += 64;
113 len -= 64;
114 }
115
116
117
118 memmove(ctx->in, buf, len);
119}
120
121
122
123
124
125static void
126MD5Final(unsigned char digest[16], struct MD5Context *ctx)
127{
128 unsigned int count;
129 unsigned char *p;
130
131
132 count = (ctx->bits[0] >> 3) & 0x3F;
133
134
135
136 p = ctx->in + count;
137 *p++ = 0x80;
138
139
140 count = 64 - 1 - count;
141
142
143 if (count < 8) {
144
145 memset(p, 0, count);
146 byteReverse(ctx->in, 16);
147 MD5Transform(ctx->buf, (__u32 *) ctx->in);
148
149
150 memset(ctx->in, 0, 56);
151 } else {
152
153 memset(p, 0, count - 8);
154 }
155 byteReverse(ctx->in, 14);
156
157
158 ((__u32 *) ctx->in)[14] = ctx->bits[0];
159 ((__u32 *) ctx->in)[15] = ctx->bits[1];
160
161 MD5Transform(ctx->buf, (__u32 *) ctx->in);
162 byteReverse((unsigned char *) ctx->buf, 4);
163 memmove(digest, ctx->buf, 16);
164 memset(ctx, 0, sizeof(*ctx));
165}
166
167
168
169
170#define F1(x, y, z) (z ^ (x & (y ^ z)))
171#define F2(x, y, z) F1(z, x, y)
172#define F3(x, y, z) (x ^ y ^ z)
173#define F4(x, y, z) (y ^ (x | ~z))
174
175
176#define MD5STEP(f, w, x, y, z, data, s) \
177 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
178
179
180
181
182
183
184static void
185MD5Transform(__u32 buf[4], __u32 const in[16])
186{
187 register __u32 a, b, c, d;
188
189 a = buf[0];
190 b = buf[1];
191 c = buf[2];
192 d = buf[3];
193
194 MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
195 MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
196 MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
197 MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
198 MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
199 MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
200 MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
201 MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
202 MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
203 MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
204 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
205 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
206 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
207 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
208 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
209 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
210
211 MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
212 MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
213 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
214 MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
215 MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
216 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
217 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
218 MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
219 MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
220 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
221 MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
222 MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
223 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
224 MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
225 MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
226 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
227
228 MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
229 MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
230 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
231 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
232 MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
233 MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
234 MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
235 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
236 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
237 MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
238 MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
239 MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
240 MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
241 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
242 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
243 MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
244
245 MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
246 MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
247 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
248 MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
249 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
250 MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
251 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
252 MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
253 MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
254 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
255 MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
256 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
257 MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
258 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
259 MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
260 MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
261
262 buf[0] += a;
263 buf[1] += b;
264 buf[2] += c;
265 buf[3] += d;
266}
267
268
269
270
271
272void
273md5 (unsigned char *input, int len, unsigned char output[16])
274{
275 struct MD5Context context;
276
277 MD5Init(&context);
278 MD5Update(&context, input, len);
279 MD5Final(output, &context);
280}
281
282
283
284
285
286
287
288void
289md5_wd (unsigned char *input, int len, unsigned char output[16],
290 unsigned int chunk_sz)
291{
292 struct MD5Context context;
293#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
294 unsigned char *end, *curr;
295 int chunk;
296#endif
297
298 MD5Init(&context);
299
300#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
301 curr = input;
302 end = input + len;
303 while (curr < end) {
304 chunk = end - curr;
305 if (chunk > chunk_sz)
306 chunk = chunk_sz;
307 MD5Update(&context, curr, chunk);
308 curr += chunk;
309 WATCHDOG_RESET ();
310 }
311#else
312 MD5Update(&context, input, len);
313#endif
314
315 MD5Final(output, &context);
316}
317