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#include "global.h"
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#include "md5.h"
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) K w0 b( d( U; l- E7 I/* Constants for MD5Transform routine.
*/
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#define S11 7
/ o' J7 v. P) @; n; d#define S12 12
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#define S13 17
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#define S14 22
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#define S21 5
# j1 A0 c# {6 A' A' _3 ~1 ?#define S22 9
U& C/ Y8 t- e1 p9 V#define S23 14
& L5 T: |* T& [! s# l#define S24 20
; F( o$ x' M7 z0 p& X#define S31 4
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#define S32 11
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#define S33 16
. X* e) u% E+ y s2 i- H#define S34 23
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#define S41 6
) A+ J1 K0 t* n$ t( V#define S42 10
4 x6 R' ]3 U) p D( G" W#define S43 15
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#define S44 21
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5 \ g' K' J: n1 Ystatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
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static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
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static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
& S' Y% d6 e8 s3 ?static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
6 v6 m5 v* T8 x g. Lstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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) k. k6 `$ f; Ystatic 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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/* F, G, H and I are basic MD5 functions.
*/
0 A. {+ x+ Y+ V5 x#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
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#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
: I* I2 ^7 D0 m1 [: A#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.
*/
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#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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J$ ~2 V3 a: ?& e3 T. h/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
% W4 e4 m" ?0 S0 RRotation is separate from addition to prevent recomputation.
*/
- B5 ^. L' g, _( o$ m#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
6 c1 Q) p' N1 x1 M: p. [#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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2 \4 P( A' I1 N f% S/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
8 I( V* ?' ]* G. M2 d# Xvoid MD5Init (context)
^# J; e5 B) @1 {
MD5_CTX *context; /* context */
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context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
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context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
, h9 U4 ~2 w0 N/ [3 E8 Rvoid MD5Update (context, input, inputLen)
$ s; v; j- m& w# @2 ]& J% {: wMD5_CTX *context; /* context */
6 |; Q9 G7 q7 S9 \% Y+ L' a: ~+ Vunsigned 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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