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#include "global.h"
0 ^8 h4 O5 l( q( P#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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4 \* n6 C4 C% p" @0 [6 t. R' C4 ^. @#define S11 7
" F9 z$ w% ^4 f- V. {
#define S12 12
0 C, ]7 N1 k0 Y$ ?" l: V* S9 @5 W7 v#define S13 17
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#define S14 22
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#define S21 5
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#define S22 9
$ g* l: Z! u+ W. ]# i( a3 z#define S23 14
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#define S24 20
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#define S31 4
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#define S32 11
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#define S33 16
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#define S34 23
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#define S41 6
2 `3 S! G% m6 P0 s#define S42 10
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#define S43 15
0 [6 |1 g0 H" @#define S44 21
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* F1 J r- {+ {- c$ H, xstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
% x9 ^, q. d1 }( \$ @1 z: Istatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
5 B) q( r$ o, i' z% h
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
, X& {+ j4 ~9 }% kstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
* D7 q& U1 W( R) ?; }9 pstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
* N3 }, M$ S% I! d+ b
?* x5 O, G" a4 Z3 L) estatic 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.
*/
. |- H: C9 v# [" `, m#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))
/ c( E( L) r7 G# l$ i1 m D& V: c( Q#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
; O3 I) Q V$ X
#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 q) s+ k' \0 i+ `: U+ xRotation is separate from addition to prevent recomputation.
*/
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#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); \
}
" V7 ]+ {9 }5 h* ]+ 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); \
}
7 E+ U; ~6 _0 d( w/ U) `1 m3 u#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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" ? ~- w: S' }" Y6 L/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
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void MD5Init (context)
- i$ z" J; ` WMD5_CTX *context; /* context */
2 }5 w/ I- M/ M0 B{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
+ o6 p( ~( ~! e# W: j% K*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
" K$ @7 K$ d% D( S}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
2 A! N& X4 L% D- W7 K( S& Xvoid MD5Update (context, input, inputLen)
" _% @4 c6 D- q4 }. y2 C) YMD5_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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