md5加密算法C++程序

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#include "global.h"
& m9 Y2 o; H: Q4 b% i" |. R4 w3 N#include "md5.h"
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+ E5 Z; z1 `. r' C; U3 ?% S8 p1 I% c/* Constants for MD5Transform routine.
*/


) J1 Y5 E+ @2 _+ w) ^1 F7 L+ x#define S11 7
# A! G5 i6 o7 N9 V3 Y/ a#define S12 12
#define S13 17
- x) ]9 ^: b& O" p0 N+ h$ z% a$ T#define S14 22
#define S21 5
#define S22 9
# t9 A; q+ u* O#define S23 14
#define S24 20
#define S31 4
#define S32 11
0 A$ c5 D( [% {: h, f9 M/ l. V#define S33 16
7 g y9 \1 [% N2 ~8 f; ^1 d#define S34 23
; f6 P+ H% m/ p$ a q9 b% A0 a' F% D x#define S41 6
. a; J5 v9 s8 P6 _% [) i/ A#define S42 10
#define S43 15
7 ]* a/ Y ]- d$ ?$ |" w#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
2 ]+ q& z) C2 }" D4 w* ^static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
% D9 X: j6 G0 J: ^0 F( G+ g$ I& zstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
7 }0 R$ o( r" R/ J: L! ^static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
$ K+ o5 S! o! `1 ]% k$ q
" M+ {. C9 j2 q3 H2 F, vstatic 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.
*/
$ k2 t1 f, F3 W5 z& N0 [#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
#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.
Rotation is separate from addition to prevent recomputation.
*/
7 ~' W6 l6 \4 F. p( v5 v% j#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
9 m* N% `, P2 A. S# J#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
6 f7 J0 B7 s" F0 A' \: ^#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); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
3 C9 B9 z6 O" w- T2 e5 ^0 uvoid MD5Init (context)
+ C i8 T9 u+ v3 ?, W EMD5_CTX *context; /* context */
{
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;
6 Z8 P& C2 ^6 J, y}

+ Q, r/ M: U! q0 c- G- Y/ C/* 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 */
9 A% Y# r1 k! Y+ k7 p# ~' Z5 {unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;

/* 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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