md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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( k8 C4 ]" d9 C3 Z6 j4 E7 e: A5 p#define S11 7
" J. C' i, p8 @#define S12 12
$ k; p) i# y8 l# B i8 C- f#define S13 17
5 @' w# t* m& @7 X9 t3 T#define S14 22
* H5 ]7 s, _/ @& W5 W#define S21 5
* s7 s- ]# @" h' I7 t$ k#define S22 9
#define S23 14
+ l2 A! q' ^* H/ t#define S24 20
#define S31 4
/ M5 c) n" E4 V! f#define S32 11
& f+ Q0 `' {. D#define S33 16
9 v: w( E6 U2 r9 z8 n, C0 W4 ^#define S34 23
; O! a& Z+ Q y0 t* f0 ]+ L#define S41 6
#define S42 10
#define S43 15
, [: {4 i' g% Z+ ^8 v#define S44 21
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6 w L( A& J) _+ W; k6 xstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
: n- u8 J& w$ O8 K5 ~static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
" ^. ]; h2 K; Jstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
/ @: l3 a' Z( m3 {static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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static 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 {$ w- ?. k) S3 M};
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! @+ {5 f0 ~: E; j9 |/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
8 E. n5 E6 Y3 ^( K#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
/ o3 i" g% ~* _! X#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))))

9 F2 Y( l" J0 H4 ]/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
% w }& d- M# F( L- ?% V* u1 D#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
* J2 T- x; S2 l! v: F2 O#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#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); \
}
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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
$ d- r; W0 ` ]void MD5Init (context)
$ Q5 F- ]! D9 O( X$ N8 C! ]- xMD5_CTX *context; /* context */
/ J- S* z, c. g{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
+ n9 P3 g- h9 a( S- D c# u: }*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
* a! O9 V4 h% `! V/ o, _+ d& d}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
4 E1 S1 r) y8 d1 X9 z2 JMD5_CTX *context; /* context */
" h# r" W; n" I; Zunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
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unsigned int i, index, partLen;

/* 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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