md5加密算法C++程序

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#include "global.h"
; B) S1 v( l7 P0 V; {* A' q; {#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
( o4 Y: k: w2 I# Q- |#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
. ~- @; F+ D$ ?/ j1 |# k#define S41 6
7 y! v; x0 g6 j2 x#define S42 10
#define S43 15
#define S44 21
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: m0 D# @5 U0 C+ Vstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
" S! ^2 ^: l; u* [% r8 f5 nstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
7 w- n6 D! A! e( o8 Sstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
; Y1 V7 \, S9 m* Fstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
4 o0 w6 f/ J- D( X% Z- t1 Vstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

' g7 C, \ z( f( G3 Mstatic 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.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
# m4 J. @% R3 L% M#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
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1 [. v' B" V+ f3 d" F/* ROTATE_LEFT rotates x left n bits.
*/
' k1 S/ k% D4 ~5 b#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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) I; t" o2 c4 J* k0 g7 C/* 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); \
}
' r9 C# ]) p) t9 ], ~! V#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
( p4 I$ G2 F r" v#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
+ t& `1 m( W2 r$ x- \- |5 _( F- R# V#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.
*/
2 Y5 |$ S+ U2 Yvoid 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;
" u. X, j2 I" q$ F1 D, ~: w}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
8 j( e* I8 }9 K6 A o( l, r9 UMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
8 h8 g- k5 y4 u6 |3 X! L& ~{
unsigned int i, index, partLen;

/* 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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