md5加密算法C++程序

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#include "global.h"
! t$ j% C; X( p- p* F% s#include "md5.h"

/* Constants for MD5Transform routine.
*/


#define S11 7
#define S12 12
7 o6 J3 Z3 e; {#define S13 17
#define S14 22
0 k' a( }" j3 { V6 d3 z#define S21 5
#define S22 9
#define S23 14
! I: q5 T* J! \#define S24 20
#define S31 4
' V, Z- i% s1 [#define S32 11
#define S33 16
#define S34 23
+ R8 J; a& C( w4 e#define S41 6
#define S42 10
#define S43 15
#define S44 21
1 |2 _1 k$ [+ q( l: x) w* @
% [4 \2 W9 \/ j% Ustatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
! Z; `/ y% `7 g' Xstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
( x( j L$ l( i! W' l+ |8 o3 f! dstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
) w) Q# s G# L# U3 ?static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

$ e3 k) p2 M& H7 c8 G% w1 M( 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
6 Q, `! z7 ~/ w( {. N& \* x};

/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
& O( T4 ]; x" _2 k#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
6 \8 q. b! q' \#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
7 v9 H) U" J C; I# `#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
% m5 ~$ o, j5 [" y4 @#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
) \* m5 M' y$ O, k3 n) [+ k4 C#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.
*/
1 B) H. Q! z0 x; z4 Tvoid MD5Init (context)
MD5_CTX *context; /* context */
$ \# s7 t" N# j+ S `{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
4 h3 Z; k+ \3 Q z5 t( _*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
1 {7 S/ R$ ?# x0 L) w |! y& W( `}
' E8 e. S" W7 O0 }8 p! F" y
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
* l+ o; }1 y( H* W& Q! f! \MD5_CTX *context; /* context */
3 s1 @) P9 f; g; D% W, eunsigned char *input; /* input block */
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);
9 h) [3 R9 G) J
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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