md5加密算法C++程序

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#include "global.h"
#include "md5.h"

7 G" ?5 C+ c, q( M" s$ P% M/* Constants for MD5Transform routine.
*/

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#define S11 7
+ b0 g1 b6 ~4 Y$ }- z; ?#define S12 12
- L5 D& B0 |. h. n! R! n! I$ b#define S13 17
#define S14 22
#define S21 5
# [9 d7 W, f- r4 Y1 Q% a#define S22 9
#define S23 14
0 ]+ w3 E* N8 \" y3 j& e. A#define S24 20
( i. G5 U* c2 H) }( j! [#define S31 4
#define S32 11
% G3 s2 }5 G0 t, S7 Y#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21

. h1 W, y" l f9 pstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
+ G9 H8 u/ q& {: [. U; ustatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
4 ~ t4 b0 E; x% U8 D8 {' cstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
: u3 s6 n s) ]- i3 U& A" w* Jstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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3 w% Q8 n/ f0 K, G4 y( xstatic 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.
*/
$ ?+ v) t; u4 a8 Y% t3 N5 F#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
4 r2 R# J& H, l. p#define H(x, y, z) ((x) ^ (y) ^ (z))
) U; U6 O* a) B* B! u! J. S#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
5 |# x1 P, h9 U1 R$ IRotation is separate from addition to prevent recomputation.
*/
6 e }; u2 s, C# g& i7 B2 @% @#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
5 }% {+ Q3 ^. N% F- w! o& b4 S#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
/ @1 \8 x8 C' [/ a, o, I6 K#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

& W7 r0 ~6 Q9 ]: o4 r/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
) S3 C7 ]$ Z/ @MD5_CTX *context; /* context */
$ ^5 Z+ U: U4 N) z. ]9 E{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
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, z+ r, D3 p4 T/ m; W% g2 R% O w/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
3 C- y9 c' U2 y' ?{
unsigned int i, index, partLen;
: v. H( S/ I o# m) g4 x
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);

/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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