2 * This file was transplanted with slight modifications from Linux sources
3 * (fs/cifs/md5.c) into U-Boot by Bartlomiej Sieka <tur@semihalf.com>.
7 * This code implements the MD5 message-digest algorithm.
8 * The algorithm is due to Ron Rivest. This code was
9 * written by Colin Plumb in 1993, no copyright is claimed.
10 * This code is in the public domain; do with it what you wish.
12 * Equivalent code is available from RSA Data Security, Inc.
13 * This code has been tested against that, and is equivalent,
14 * except that you don't need to include two pages of legalese
17 * To compute the message digest of a chunk of bytes, declare an
18 * MD5Context structure, pass it to MD5Init, call MD5Update as
19 * needed on buffers full of bytes, and then call MD5Final, which
20 * will fill a supplied 16-byte array with the digest.
23 /* This code slightly modified to fit into Samba by
24 abartlet@samba.org Jun 2001
25 and to fit the cifs vfs by
26 Steve French sfrench@us.ibm.com */
30 #include <linux/string.h>
33 #endif /* USE_HOSTCC */
35 #include <linux/types.h>
36 #include <u-boot/md5.h>
39 MD5Transform(__u32 buf[4], __u32 const in[16]);
42 * Note: this code is harmless on little-endian machines.
45 byteReverse(unsigned char *buf, unsigned longs)
49 t = (__u32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
50 ((unsigned) buf[1] << 8 | buf[0]);
57 * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
58 * initialization constants.
61 MD5Init(struct MD5Context *ctx)
63 ctx->buf[0] = 0x67452301;
64 ctx->buf[1] = 0xefcdab89;
65 ctx->buf[2] = 0x98badcfe;
66 ctx->buf[3] = 0x10325476;
73 * Update context to reflect the concatenation of another buffer full
77 MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len)
84 if ((ctx->bits[0] = t + ((__u32) len << 3)) < t)
85 ctx->bits[1]++; /* Carry from low to high */
86 ctx->bits[1] += len >> 29;
88 t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
90 /* Handle any leading odd-sized chunks */
93 unsigned char *p = (unsigned char *) ctx->in + t;
101 byteReverse(ctx->in, 16);
102 MD5Transform(ctx->buf, (__u32 *) ctx->in);
106 /* Process data in 64-byte chunks */
109 memmove(ctx->in, buf, 64);
110 byteReverse(ctx->in, 16);
111 MD5Transform(ctx->buf, (__u32 *) ctx->in);
116 /* Handle any remaining bytes of data. */
118 memmove(ctx->in, buf, len);
122 * Final wrapup - pad to 64-byte boundary with the bit pattern
123 * 1 0* (64-bit count of bits processed, MSB-first)
126 MD5Final(unsigned char digest[16], struct MD5Context *ctx)
131 /* Compute number of bytes mod 64 */
132 count = (ctx->bits[0] >> 3) & 0x3F;
134 /* Set the first char of padding to 0x80. This is safe since there is
135 always at least one byte free */
139 /* Bytes of padding needed to make 64 bytes */
140 count = 64 - 1 - count;
142 /* Pad out to 56 mod 64 */
144 /* Two lots of padding: Pad the first block to 64 bytes */
146 byteReverse(ctx->in, 16);
147 MD5Transform(ctx->buf, (__u32 *) ctx->in);
149 /* Now fill the next block with 56 bytes */
150 memset(ctx->in, 0, 56);
152 /* Pad block to 56 bytes */
153 memset(p, 0, count - 8);
155 byteReverse(ctx->in, 14);
157 /* Append length in bits and transform */
158 ((__u32 *) ctx->in)[14] = ctx->bits[0];
159 ((__u32 *) ctx->in)[15] = ctx->bits[1];
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)); /* In case it's sensitive */
167 /* The four core functions - F1 is optimized somewhat */
169 /* #define F1(x, y, z) (x & y | ~x & z) */
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))
175 /* This is the central step in the MD5 algorithm. */
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 )
180 * The core of the MD5 algorithm, this alters an existing MD5 hash to
181 * reflect the addition of 16 longwords of new data. MD5Update blocks
182 * the data and converts bytes into longwords for this routine.
185 MD5Transform(__u32 buf[4], __u32 const in[16])
187 register __u32 a, b, c, d;
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);
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);
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);
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);
269 * Calculate and store in 'output' the MD5 digest of 'len' bytes at
270 * 'input'. 'output' must have enough space to hold 16 bytes.
273 md5 (unsigned char *input, int len, unsigned char output[16])
275 struct MD5Context context;
278 MD5Update(&context, input, len);
279 MD5Final(output, &context);
284 * Calculate and store in 'output' the MD5 digest of 'len' bytes at 'input'.
285 * 'output' must have enough space to hold 16 bytes. If 'chunk' Trigger the
286 * watchdog every 'chunk_sz' bytes of input processed.
289 md5_wd (unsigned char *input, int len, unsigned char output[16],
290 unsigned int chunk_sz)
292 struct MD5Context context;
293 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
294 unsigned char *end, *curr;
300 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
305 if (chunk > chunk_sz)
307 MD5Update(&context, curr, chunk);
312 MD5Update(&context, input, len);
315 MD5Final(output, &context);