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#include "global.h"
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#include "md5.h"
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% O% c. w2 g2 ^2 l/* Constants for MD5Transform routine.
*/
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#define S11 7
; [5 k8 d; _4 q- a6 R8 Z#define S12 12
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#define S13 17
7 ~6 c1 O9 K) K* F+ D#define S14 22
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#define S21 5
2 |6 t$ O3 W7 V6 Y#define S22 9
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#define S23 14
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#define S24 20
. _& h/ p' V) Y; L' N( n% [" o# s#define S31 4
: F1 N8 J$ e; X1 J. r1 ]& S r#define S32 11
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#define S33 16
7 h. F) f* F& M#define S34 23
7 e7 q# Q1 q- F: z3 v* C#define S41 6
. |/ T, w4 K0 q Q# J' C#define S42 10
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#define S43 15
+ ]: M& q4 v0 n. u) H V% X6 Z#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
, A0 k6 ~! \7 t9 D' ^static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
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static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
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static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
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static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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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
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};
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/* F, G, H and I are basic MD5 functions.
*/
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#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
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#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
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#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
8 ~2 q( O/ z" M#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
. \8 l: U0 w: RRotation is separate from addition to prevent recomputation.
*/
6 g9 n# n) O, Q4 L#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
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void MD5Init (context)
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MD5_CTX *context; /* context */
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context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
' ?+ R7 k# q. s$ \9 |5 Q*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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}
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5 [" y* I1 m6 @. d. E- x5 |' `6 l/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
/ a; t. @# n3 A! M8 l* a6 \; Lvoid MD5Update (context, input, inputLen)
* c& O- `- N+ m0 TMD5_CTX *context; /* context */
( X* [1 J# h0 bunsigned char *input; /* input block */
0 D' q8 l! ~0 N; ~unsigned int inputLen; /* length of input block */
5 D' @. Y. C% M6 L4 r% g{
unsigned int i, index, partLen;
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/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
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发表于 2004-11-26 20:11:20
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