md5加密算法C++程序

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#include "global.h"
' v% Z, Y" ?5 P( s2 v! V#include "md5.h"
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/* Constants for MD5Transform routine.
*/

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" A: G. h" z, q#define S11 7
#define S12 12
" U$ u9 j$ l& Z" y#define S13 17
9 }9 v7 y+ D' `( B6 T' H) k#define S14 22
: s% E8 m. P3 {5 {, S E6 n# Z" M! ?#define S21 5
- V+ I/ u7 P* f#define S22 9
* h/ b1 i! @) B#define S23 14
#define S24 20
#define S31 4
. F: r9 M0 D e% k- p#define S32 11
#define S33 16
) Y# O+ q' ~8 S, _4 }#define S34 23
#define S41 6
! i7 _# k3 H. j5 C#define S42 10
#define S43 15
" x. s1 J0 k( K% R) k#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
! \& I% v* n" @static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

8 ]% Q- T6 n W! O0 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
7 D% F3 g& H8 Y& r};
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/* F, G, H and I are basic MD5 functions.
*/
. R8 J! j* P$ m) \: y8 `#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
: T2 z7 ?: O3 z9 @5 ^#define H(x, y, z) ((x) ^ (y) ^ (z))
/ H- {/ h. v) H7 ~5 H#define I(x, y, z) ((y) ^ ((x) | (~z)))
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( D9 i1 I' R/ @! c5 [+ ~/* 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.
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); \
}
#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); \
}
! ?* |9 d0 K: o& O/ G5 O7 F$ x#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.
*/
, A0 ?8 t4 v) m. Ovoid MD5Init (context)
MD5_CTX *context; /* context */
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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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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
% ~% v: s% Z: h, I, T# C# |MD5_CTX *context; /* context */
unsigned char *input; /* input block */
! U- h- p7 X+ _+ [% R! m9 d/ junsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
: }; [% N& U6 g
/* 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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