md5加密算法C++程序

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#include "global.h"
2 u& D, A, y" w$ v. _* q; s) K/ t* Y#include "md5.h"
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/* Constants for MD5Transform routine.
*/


4 v6 V: ^$ D% @: [3 t! {5 }#define S11 7
0 Y1 \" S9 @3 d: ?#define S12 12
#define S13 17
#define S14 22
#define S21 5
6 b! D9 K5 G2 `$ H9 I7 @' O#define S22 9
#define S23 14
#define S24 20
* h/ A8 h9 u4 C* u#define S31 4
% }, X+ @% A; f& i( P* U#define S32 11
#define S33 16
: {4 A1 w2 O# ]; Y( ^#define S34 23
#define S41 6
#define S42 10
/ _/ M; M, f" V+ K6 {& X8 r#define S43 15
5 D! |4 E/ b" r) Y K" G: n9 y#define S44 21
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; S2 [0 i$ h! T8 |2 k4 w+ P' i% Qstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
% T% b- X) `0 n; [2 a" Hstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
4 W- F. q- t$ o8 p. V9 Nstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
$ L \2 X1 f# l. rstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

. R) E/ D! t* X6 N5 W, w2 \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
};
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/* F, G, H and I are basic MD5 functions.
*/
9 e- j0 f5 ~# B#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)))
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% B, J5 J. k1 J( {/* 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.
; n5 M: w% H8 @; {Rotation is separate from addition to prevent recomputation.
*/
5 z4 A( n9 B/ U9 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); \
}
4 c5 j* h$ H/ V1 X! |' @/ X$ \: 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); \
}
6 r, g7 [2 X, 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); \
}
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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
Y5 T4 c k" j% ]% t/ m# ?; ~void MD5Init (context)
- ?( @: G/ P f, R1 pMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
+ y3 x) F# {) [6 P* X! \*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
- b$ `3 p9 L c. jvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
5 F# R$ g% z% gunsigned char *input; /* input block */
- J7 r% F- G; w" I. y; ~unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
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/* 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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