md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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" v5 ?1 g5 {; f" }; W/* Constants for MD5Transform routine.
*/


' W' G u" K4 f- J#define S11 7
#define S12 12
#define S13 17
, | b; w* m# k; m* b* C#define S14 22
5 |3 @1 l+ ?: O. M7 I9 j0 m#define S21 5
. U, W- x' c! L4 ?#define S22 9
#define S23 14
#define S24 20
#define S31 4
0 W$ R+ Z1 K5 X2 X. L#define S32 11
#define S33 16
#define S34 23
3 P+ g: S4 u8 r" U7 q m#define S41 6
#define S42 10
#define S43 15
4 y/ f4 R2 y8 S5 S6 r- e# G# ~1 A8 Q#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
" L% k: t0 E4 X2 Y/ G' C; H, h) Bstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
/ n: }' Z# P# q; _7 r hstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

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
};

/* F, G, H and I are basic MD5 functions.
*/
! D1 X* a1 o' s: ?# J! [% G#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
: E* H& v. ]& A1 g" ]- l1 ~. @#define H(x, y, z) ((x) ^ (y) ^ (z))
) W6 y# u% Q6 A#define I(x, y, z) ((y) ^ ((x) | (~z)))
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+ [ n0 F8 e5 b; d( M6 y/* ROTATE_LEFT rotates x left n bits.
*/
! `; {7 k8 I u3 W' J#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

( Y6 p0 r0 b$ p% v/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
4 E! o; c: G1 S1 p: {( C7 ~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); \
}
2 [0 F* F6 |& G0 P B- d1 M#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); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
( A, S2 l, k$ ~5 W! p0 o' G1 Mvoid MD5Init (context)
MD5_CTX *context; /* context */
2 d6 h- T1 M; q2 r# v3 j% @# {{
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;
0 } k4 C& z4 w" |}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
/ T) V5 f5 ]. O; Q. R8 }void MD5Update (context, input, inputLen)
! S% f: N; M& S( i& |MD5_CTX *context; /* context */
unsigned 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);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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