md5加密算法C++程序

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#include "global.h"
, u( V! |* E2 i3 Z0 g% e! k#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
#define S13 17
! y7 x2 t' i) ?6 R# M#define S14 22
' `& A5 J' i# N7 ?- P2 D#define S21 5
#define S22 9
#define S23 14
! m* K8 b6 W2 a* F8 M [8 W#define S24 20
6 J& M" ]: o3 e. p* @9 B#define S31 4
8 F5 ]8 h) \1 b4 X#define S32 11
#define S33 16
- Z, V- @4 c B7 j" T( W#define S34 23
#define S41 6
; |: |3 \ y" C6 H#define S42 10
#define S43 15
) e0 }9 f9 x6 f: G0 @#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
+ S* y) q b% o# j" N9 r7 `7 a, A* Mstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
- \, H7 w% A' y* Ostatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
2 x2 a$ D3 {: d# fstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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1 R/ E5 [0 s, o% ^+ J3 dstatic 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
- c# [ Q3 R- p1 e K$ l};

" Z+ O" w/ \$ b; M4 N; b6 t/* F, G, H and I are basic MD5 functions.
*/
#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))
8 T; ]( g& M, V! ~0 S2 D5 X Y#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))))
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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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); \
}
$ w5 A5 n n/ P5 o$ T2 T4 c#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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- K, _) i6 h; Q6 g7 A8 o! ?/ x0 H/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
2 e& T' U- L; @: X8 t1 eMD5_CTX *context; /* context */
{
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;
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, ^; M f' P1 N- M! T# V, d3 ~/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
7 m f) E( b5 e- Q! g# G' T. ivoid MD5Update (context, input, inputLen)
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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