md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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# Q) a$ [& b5 J; t( [/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
, V& h/ s/ g: K#define S24 20
#define S31 4
/ N& @/ Z% h/ ^2 Y% L+ K4 @#define S32 11
3 b; I. T6 C9 ?#define S33 16
#define S34 23
6 s& D7 f2 z. |! h* `/ I#define S41 6
/ b# ^$ r6 s4 f" z) o% Q#define S42 10
#define S43 15
2 G& R x, ~" i. D0 E; i+ I3 p#define S44 21

& Z4 q. V4 l* |$ N7 ?' g# `8 Gstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
! i3 H8 ^6 X: l% S. @0 Nstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
. H" C' l0 ]! y4 F: V5 tstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

6 D2 v7 ]! p$ R3 ~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# V* x; G: h% d};
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/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
9 T; v+ b* x: N, I, ?9 }; J#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* 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.
9 @& R, J* d8 p% ~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); \
}
, x6 N; g% k( ]: _( y! u#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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& |& b' R$ C7 D1 R2 ^3 |7 D/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
1 c9 f5 Q& p2 f* p* f7 B. V0 Q2 pvoid MD5Init (context)
% W6 j( g5 j2 Z4 t% n$ @$ \MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
" B( F5 L( x1 N3 Z1 d*/
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)
; Y }' i0 C$ s2 f+ E8 s# H/ ^2 n3 sMD5_CTX *context; /* context */
( y5 M. ?0 ?6 a4 v+ ?unsigned char *input; /* input block */
- ~8 q, e: x% u! y( Q6 ?unsigned int inputLen; /* length of input block */
( q2 N% e& r$ N9 c1 u# y7 p& J{
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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