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#include "global.h"
! e8 Z6 ~6 e* @) C#include "md5.h"
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3 F. Y' q* Z( O6 x( p- c2 \/* Constants for MD5Transform routine.
*/
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0 w5 L9 q4 S# N# R/ W C#define S11 7
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#define S12 12
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#define S13 17
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#define S14 22
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#define S21 5
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#define S22 9
5 N; L4 o( e4 I* ~4 l4 n#define S23 14
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#define S24 20
- e S$ }$ e/ }#define S31 4
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#define S32 11
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#define S33 16
) N9 C) W2 v; E) |#define S34 23
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#define S41 6
! [. ?# o8 i6 |6 Y#define S42 10
, h' B4 X, _8 r3 ^; d- y5 S- x#define S43 15
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#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
3 ?, L' K3 `3 d* s: G( y3 M% {static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
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static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
' a( G6 _2 T' ^" _' e2 }static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
- t; }1 H' H5 C+ Ostatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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0 M' D2 g1 Y& t- \8 O; G% S. Sstatic 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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8 D2 T5 v6 _/ v1 v/* F, G, H and I are basic MD5 functions.
*/
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#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
3 x) X1 x# F; w! z; z9 }#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
$ E' A: y: I! a; H, L$ l#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | (~z)))
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3 @+ t" ~& Y* S# M$ }* j, n3 z2 W/* ROTATE_LEFT rotates x left n bits.
*/
5 L* C5 \3 S1 T" _7 p#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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. r% P3 c; b- i& f7 l; i j1 C/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
# H) D9 g q5 a" CRotation is separate from addition to prevent recomputation.
*/
\! O$ p+ U& I' Z#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); \
}
+ z6 q( h A( |$ F# ~0 U#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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+ B6 I+ B" S/ N5 H6 I! y/* 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.
6 T2 ~# a c" M: y1 g*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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6 |! Y- Q( w8 Z; j/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
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void MD5Update (context, input, inputLen)
! Z- s+ y! i; y" UMD5_CTX *context; /* context */
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unsigned char *input; /* input block */
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unsigned int inputLen; /* length of input block */
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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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