md5加密算法C++程序

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#include "global.h"
: z5 j0 {5 ` E0 l4 Q#include "md5.h"
; O( }2 L. O2 l. V
* t0 L% n2 ~5 t/* Constants for MD5Transform routine.
*/


7 h! c. a% |2 a5 J6 K/ b#define S11 7
( {, |8 Z9 X) P" F4 x& @4 }#define S12 12
#define S13 17
0 H, {- g v: g. \% o- Q. g#define S14 22
1 ]1 N+ j4 U9 ^+ c: F#define S21 5
#define S22 9
: [' `% B3 }, G c' p6 K#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
$ T6 @$ y1 Y! ~7 y$ z#define S41 6
; o& x. [1 X0 j. V- c#define S42 10
#define S43 15
#define S44 21
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) @& O$ L9 l) p: X# i* mstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
/ e! D9 b E: I! w. h, ~" d" o6 kstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
' ^ o) I! [% b7 q% \static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
) ^( n8 E3 U: N$ H
8 s* z$ B8 L1 R+ ^( v, Pstatic 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
( D. s# {+ F) t5 w};

/* F, G, H and I are basic MD5 functions.
*/
, W0 C8 ^; g) S6 ^) A" c#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
$ |6 c H* Z! E0 `1 C" S. w# Q#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)))

. H. b: _# \, ~/ b# m- d/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

f9 V+ c$ T3 ~+ x3 U/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
h! ~8 Z, H6 t#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
: S/ q: h! b/ f$ ? y% s#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); \
}
4 h6 E4 u! G6 K4 K& ?
) f0 ]: v) w; h: _" g$ F/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
- i( ~2 ~: D7 Z, m; T+ Hvoid MD5Init (context)
. q& N1 s" C( ]" b- x2 [ IMD5_CTX *context; /* context */
$ Y% s% y4 `+ n: }{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
( c* U& I/ F6 R5 N*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
; v7 W9 W; H* ^: b+ q}
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/ w9 ^; c! }: ?* Q/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
" _- s$ H/ h: P3 `8 ]MD5_CTX *context; /* context */
unsigned char *input; /* input block */
! j9 q2 k0 O% j8 l8 z* J. F. vunsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
. Z- w e' _; V+ o/ [+ D5 f! E, Z
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
9 O M2 c" e% H! R
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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