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#include "global.h"
/ o& _: ?0 ?0 `/ d, w1 U#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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#define S11 7
4 M( L3 S# R& h1 ^- v#define S12 12
6 O, O: u! o( G* R( k#define S13 17
/ ^3 N7 B# }4 q1 C2 z#define S14 22
' w6 y% N$ R, S8 {#define S21 5
; ?: y! [5 Z) o. Z" k+ P#define S22 9
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#define S23 14
3 J% _$ w. W; y n9 y#define S24 20
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#define S31 4
$ V$ |. l! w5 o5 P ?1 x0 W#define S32 11
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#define S33 16
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#define S34 23
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#define S41 6
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#define S42 10
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#define S43 15
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#define S44 21
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static 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));
% N9 r% t0 ^( f: d8 [5 tstatic 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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* ]$ ]# n" ^7 K! G6 hstatic 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)))
, q9 m4 r, B' Z% r$ E( m3 T7 e#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | (~z)))
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" Y5 a8 h% \% u, ]# Q0 K/* 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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; C) t% \9 B2 c0 v/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
( W' G/ U# N& l/ p! E* ~Rotation 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); \
}
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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); \
}
/ G5 I' l2 e% j H$ ?' a#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.
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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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* t) ^, s2 m" M, E4 I: e" s8 B/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
" R; Z% M! X# P& x# vvoid MD5Update (context, input, inputLen)
$ F) H4 R) `' ?# x+ R4 b9 }MD5_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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