md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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C* m7 i! \) _, C3 Q! ~ _/* Constants for MD5Transform routine.
*/


: D$ {+ X6 @# O0 z#define S11 7
#define S12 12
#define S13 17
$ l4 U+ j6 O3 r z#define S14 22
#define S21 5
#define S22 9
#define S23 14
& A$ y3 P! r! K- V2 o4 [0 p#define S24 20
B5 [5 {- r B0 r; K' A& i; ~#define S31 4
( c* i+ A: ?% z: v/ k, b' b#define S32 11
U1 U1 L5 _8 G" w f$ ?5 |7 f#define S33 16
' s/ w; e/ Y# p#define S34 23
#define S41 6
#define S42 10
1 _9 S4 U; k `5 P( Z#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
7 t7 k' `* f# ?/ A+ U, Kstatic 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));
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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
};
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! o' y P# y. }; i9 T. E, C/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
; `3 r3 f7 k1 j! n0 N# s: k R) o#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
+ D. A7 Q7 G3 [, m; f8 o* `" g S#define I(x, y, z) ((y) ^ ((x) | (~z)))
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) N5 Q3 w- G: l/* ROTATE_LEFT rotates x left n bits.
*/
9 A! k" }. U5 v4 w2 i6 q" u#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.
*/
* n8 H2 V0 S, P2 V0 g1 `9 I#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); \
}
' Y7 c8 ?" D- | @5 \; Z4 m#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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7 c$ z$ P1 c. x. R. v& z/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
6 e& D1 A; P/ M: a" V c# z. zvoid MD5Init (context)
MD5_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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$ x/ D' E; u) F8 J$ G/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
9 \7 t7 a2 z8 t: aunsigned char *input; /* input block */
1 N. H: i! B% O9 A3 c& k$ Yunsigned 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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