md5加密算法C++程序

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#include "global.h"
( K$ t* Y6 C+ R4 E& L: F#include "md5.h"
: K: |4 j8 V3 F& F
$ e3 M% T ~ I9 @/* Constants for MD5Transform routine.
*/

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#define S11 7
* P# f& i( |; g#define S12 12
#define S13 17
9 @( V7 |$ `; o) F. N#define S14 22
; |9 R. U$ E* h! P2 X#define S21 5
#define S22 9
2 W1 t3 b- y$ h' z6 q#define S23 14
% \ ?1 h5 n* b#define S24 20
) x, e% l7 ^) p" J; _0 d! {0 H2 h$ A#define S31 4
0 g8 F0 X4 j, m, m+ B4 d#define S32 11
( T' B. U, A, I. A- ]! n6 w#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21
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) ]7 `3 y( {, M! N5 E- m" istatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
3 v4 ]$ @* t6 a: Ustatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
! J( N& b, q9 X! A& ]# ~static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
- ~7 G5 H, ?( z/ T0 d9 n9 Hstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
9 @* X, ?- @# q3 Dstatic 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
};

/* F, G, H and I are basic MD5 functions.
*/
4 Q9 y8 W3 e" P$ Q#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
& U* D0 u% h' d( I#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
) Z- }7 }' s, S# T- P* W#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* 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.
$ v3 J( B% X8 f8 IRotation is separate from addition to prevent recomputation.
*/
5 r. d. s# n; u& L#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); \
}
#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.
*/
; d8 D: M3 u7 e, x4 bvoid MD5Init (context)
1 ]2 m! v3 n1 p: s6 q* \MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
) Q. t9 N/ D; {2 T- v*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

* V8 L7 }8 v1 X5 g2 X6 L& V/ Z7 O/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
$ L4 t, w5 M$ Q3 l5 r6 |- UMD5_CTX *context; /* context */
+ {( V% C, S8 h; {* B1 E funsigned char *input; /* input block */
- I& \( }# M- `* A& ^unsigned int inputLen; /* length of input block */
" W# Z& T" q% m+ \1 U% W{
unsigned int i, index, partLen;
0 Y- |1 Y. H2 _$ {, T( X
/* 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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