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git.ipfire.org Git - thirdparty/u-boot.git/blob - lib/md5.c
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 */
32 #endif /* USE_HOSTCC */
33 #include <u-boot/md5.h>
36 MD5Transform(__u32 buf
[4], __u32
const in
[16]);
39 * Note: this code is harmless on little-endian machines.
42 byteReverse(unsigned char *buf
, unsigned longs
)
46 t
= (__u32
) ((unsigned) buf
[3] << 8 | buf
[2]) << 16 |
47 ((unsigned) buf
[1] << 8 | buf
[0]);
54 * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
55 * initialization constants.
58 MD5Init(struct MD5Context
*ctx
)
60 ctx
->buf
[0] = 0x67452301;
61 ctx
->buf
[1] = 0xefcdab89;
62 ctx
->buf
[2] = 0x98badcfe;
63 ctx
->buf
[3] = 0x10325476;
70 * Update context to reflect the concatenation of another buffer full
74 MD5Update(struct MD5Context
*ctx
, unsigned char const *buf
, unsigned len
)
81 if ((ctx
->bits
[0] = t
+ ((__u32
) len
<< 3)) < t
)
82 ctx
->bits
[1]++; /* Carry from low to high */
83 ctx
->bits
[1] += len
>> 29;
85 t
= (t
>> 3) & 0x3f; /* Bytes already in shsInfo->data */
87 /* Handle any leading odd-sized chunks */
90 unsigned char *p
= (unsigned char *) ctx
->in
+ t
;
98 byteReverse(ctx
->in
, 16);
99 MD5Transform(ctx
->buf
, (__u32
*) ctx
->in
);
103 /* Process data in 64-byte chunks */
106 memmove(ctx
->in
, buf
, 64);
107 byteReverse(ctx
->in
, 16);
108 MD5Transform(ctx
->buf
, (__u32
*) ctx
->in
);
113 /* Handle any remaining bytes of data. */
115 memmove(ctx
->in
, buf
, len
);
119 * Final wrapup - pad to 64-byte boundary with the bit pattern
120 * 1 0* (64-bit count of bits processed, MSB-first)
123 MD5Final(unsigned char digest
[16], struct MD5Context
*ctx
)
128 /* Compute number of bytes mod 64 */
129 count
= (ctx
->bits
[0] >> 3) & 0x3F;
131 /* Set the first char of padding to 0x80. This is safe since there is
132 always at least one byte free */
136 /* Bytes of padding needed to make 64 bytes */
137 count
= 64 - 1 - count
;
139 /* Pad out to 56 mod 64 */
141 /* Two lots of padding: Pad the first block to 64 bytes */
143 byteReverse(ctx
->in
, 16);
144 MD5Transform(ctx
->buf
, (__u32
*) ctx
->in
);
146 /* Now fill the next block with 56 bytes */
147 memset(ctx
->in
, 0, 56);
149 /* Pad block to 56 bytes */
150 memset(p
, 0, count
- 8);
152 byteReverse(ctx
->in
, 14);
154 /* Append length in bits and transform */
155 ctx
->in32
[14] = ctx
->bits
[0];
156 ctx
->in32
[15] = ctx
->bits
[1];
158 MD5Transform(ctx
->buf
, (__u32
*) ctx
->in
);
159 byteReverse((unsigned char *) ctx
->buf
, 4);
160 memmove(digest
, ctx
->buf
, 16);
161 memset(ctx
, 0, sizeof(*ctx
)); /* In case it's sensitive */
164 /* The four core functions - F1 is optimized somewhat */
166 /* #define F1(x, y, z) (x & y | ~x & z) */
167 #define F1(x, y, z) (z ^ (x & (y ^ z)))
168 #define F2(x, y, z) F1(z, x, y)
169 #define F3(x, y, z) (x ^ y ^ z)
170 #define F4(x, y, z) (y ^ (x | ~z))
172 /* This is the central step in the MD5 algorithm. */
173 #define MD5STEP(f, w, x, y, z, data, s) \
174 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
177 * The core of the MD5 algorithm, this alters an existing MD5 hash to
178 * reflect the addition of 16 longwords of new data. MD5Update blocks
179 * the data and converts bytes into longwords for this routine.
182 MD5Transform(__u32 buf
[4], __u32
const in
[16])
184 register __u32 a
, b
, c
, d
;
191 MD5STEP(F1
, a
, b
, c
, d
, in
[0] + 0xd76aa478, 7);
192 MD5STEP(F1
, d
, a
, b
, c
, in
[1] + 0xe8c7b756, 12);
193 MD5STEP(F1
, c
, d
, a
, b
, in
[2] + 0x242070db, 17);
194 MD5STEP(F1
, b
, c
, d
, a
, in
[3] + 0xc1bdceee, 22);
195 MD5STEP(F1
, a
, b
, c
, d
, in
[4] + 0xf57c0faf, 7);
196 MD5STEP(F1
, d
, a
, b
, c
, in
[5] + 0x4787c62a, 12);
197 MD5STEP(F1
, c
, d
, a
, b
, in
[6] + 0xa8304613, 17);
198 MD5STEP(F1
, b
, c
, d
, a
, in
[7] + 0xfd469501, 22);
199 MD5STEP(F1
, a
, b
, c
, d
, in
[8] + 0x698098d8, 7);
200 MD5STEP(F1
, d
, a
, b
, c
, in
[9] + 0x8b44f7af, 12);
201 MD5STEP(F1
, c
, d
, a
, b
, in
[10] + 0xffff5bb1, 17);
202 MD5STEP(F1
, b
, c
, d
, a
, in
[11] + 0x895cd7be, 22);
203 MD5STEP(F1
, a
, b
, c
, d
, in
[12] + 0x6b901122, 7);
204 MD5STEP(F1
, d
, a
, b
, c
, in
[13] + 0xfd987193, 12);
205 MD5STEP(F1
, c
, d
, a
, b
, in
[14] + 0xa679438e, 17);
206 MD5STEP(F1
, b
, c
, d
, a
, in
[15] + 0x49b40821, 22);
208 MD5STEP(F2
, a
, b
, c
, d
, in
[1] + 0xf61e2562, 5);
209 MD5STEP(F2
, d
, a
, b
, c
, in
[6] + 0xc040b340, 9);
210 MD5STEP(F2
, c
, d
, a
, b
, in
[11] + 0x265e5a51, 14);
211 MD5STEP(F2
, b
, c
, d
, a
, in
[0] + 0xe9b6c7aa, 20);
212 MD5STEP(F2
, a
, b
, c
, d
, in
[5] + 0xd62f105d, 5);
213 MD5STEP(F2
, d
, a
, b
, c
, in
[10] + 0x02441453, 9);
214 MD5STEP(F2
, c
, d
, a
, b
, in
[15] + 0xd8a1e681, 14);
215 MD5STEP(F2
, b
, c
, d
, a
, in
[4] + 0xe7d3fbc8, 20);
216 MD5STEP(F2
, a
, b
, c
, d
, in
[9] + 0x21e1cde6, 5);
217 MD5STEP(F2
, d
, a
, b
, c
, in
[14] + 0xc33707d6, 9);
218 MD5STEP(F2
, c
, d
, a
, b
, in
[3] + 0xf4d50d87, 14);
219 MD5STEP(F2
, b
, c
, d
, a
, in
[8] + 0x455a14ed, 20);
220 MD5STEP(F2
, a
, b
, c
, d
, in
[13] + 0xa9e3e905, 5);
221 MD5STEP(F2
, d
, a
, b
, c
, in
[2] + 0xfcefa3f8, 9);
222 MD5STEP(F2
, c
, d
, a
, b
, in
[7] + 0x676f02d9, 14);
223 MD5STEP(F2
, b
, c
, d
, a
, in
[12] + 0x8d2a4c8a, 20);
225 MD5STEP(F3
, a
, b
, c
, d
, in
[5] + 0xfffa3942, 4);
226 MD5STEP(F3
, d
, a
, b
, c
, in
[8] + 0x8771f681, 11);
227 MD5STEP(F3
, c
, d
, a
, b
, in
[11] + 0x6d9d6122, 16);
228 MD5STEP(F3
, b
, c
, d
, a
, in
[14] + 0xfde5380c, 23);
229 MD5STEP(F3
, a
, b
, c
, d
, in
[1] + 0xa4beea44, 4);
230 MD5STEP(F3
, d
, a
, b
, c
, in
[4] + 0x4bdecfa9, 11);
231 MD5STEP(F3
, c
, d
, a
, b
, in
[7] + 0xf6bb4b60, 16);
232 MD5STEP(F3
, b
, c
, d
, a
, in
[10] + 0xbebfbc70, 23);
233 MD5STEP(F3
, a
, b
, c
, d
, in
[13] + 0x289b7ec6, 4);
234 MD5STEP(F3
, d
, a
, b
, c
, in
[0] + 0xeaa127fa, 11);
235 MD5STEP(F3
, c
, d
, a
, b
, in
[3] + 0xd4ef3085, 16);
236 MD5STEP(F3
, b
, c
, d
, a
, in
[6] + 0x04881d05, 23);
237 MD5STEP(F3
, a
, b
, c
, d
, in
[9] + 0xd9d4d039, 4);
238 MD5STEP(F3
, d
, a
, b
, c
, in
[12] + 0xe6db99e5, 11);
239 MD5STEP(F3
, c
, d
, a
, b
, in
[15] + 0x1fa27cf8, 16);
240 MD5STEP(F3
, b
, c
, d
, a
, in
[2] + 0xc4ac5665, 23);
242 MD5STEP(F4
, a
, b
, c
, d
, in
[0] + 0xf4292244, 6);
243 MD5STEP(F4
, d
, a
, b
, c
, in
[7] + 0x432aff97, 10);
244 MD5STEP(F4
, c
, d
, a
, b
, in
[14] + 0xab9423a7, 15);
245 MD5STEP(F4
, b
, c
, d
, a
, in
[5] + 0xfc93a039, 21);
246 MD5STEP(F4
, a
, b
, c
, d
, in
[12] + 0x655b59c3, 6);
247 MD5STEP(F4
, d
, a
, b
, c
, in
[3] + 0x8f0ccc92, 10);
248 MD5STEP(F4
, c
, d
, a
, b
, in
[10] + 0xffeff47d, 15);
249 MD5STEP(F4
, b
, c
, d
, a
, in
[1] + 0x85845dd1, 21);
250 MD5STEP(F4
, a
, b
, c
, d
, in
[8] + 0x6fa87e4f, 6);
251 MD5STEP(F4
, d
, a
, b
, c
, in
[15] + 0xfe2ce6e0, 10);
252 MD5STEP(F4
, c
, d
, a
, b
, in
[6] + 0xa3014314, 15);
253 MD5STEP(F4
, b
, c
, d
, a
, in
[13] + 0x4e0811a1, 21);
254 MD5STEP(F4
, a
, b
, c
, d
, in
[4] + 0xf7537e82, 6);
255 MD5STEP(F4
, d
, a
, b
, c
, in
[11] + 0xbd3af235, 10);
256 MD5STEP(F4
, c
, d
, a
, b
, in
[2] + 0x2ad7d2bb, 15);
257 MD5STEP(F4
, b
, c
, d
, a
, in
[9] + 0xeb86d391, 21);
266 * Calculate and store in 'output' the MD5 digest of 'len' bytes at
267 * 'input'. 'output' must have enough space to hold 16 bytes.
270 md5 (unsigned char *input
, int len
, unsigned char output
[16])
272 struct MD5Context context
;
275 MD5Update(&context
, input
, len
);
276 MD5Final(output
, &context
);
281 * Calculate and store in 'output' the MD5 digest of 'len' bytes at 'input'.
282 * 'output' must have enough space to hold 16 bytes. If 'chunk' Trigger the
283 * watchdog every 'chunk_sz' bytes of input processed.
286 md5_wd(const unsigned char *input
, unsigned int len
, unsigned char output
[16],
287 unsigned int chunk_sz
)
289 struct MD5Context context
;
290 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
291 const unsigned char *end
, *curr
;
297 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
302 if (chunk
> chunk_sz
)
304 MD5Update(&context
, curr
, chunk
);
309 MD5Update(&context
, input
, len
);
312 MD5Final(output
, &context
);