md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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: @9 O. q; Z8 v7 U( \/* Constants for MD5Transform routine.
*/
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#define S11 7
3 \! J/ d6 ?+ ~9 `) ]$ @3 T#define S12 12
; z+ P& [$ ]' O# k7 p' i#define S13 17
#define S14 22
#define S21 5
#define S22 9
3 C1 D, l5 g: W2 E" D9 ?#define S23 14
#define S24 20
/ K. d& t* c4 Y: u; \' u#define S31 4
#define S32 11
#define S33 16
#define S34 23
: J: J; [8 e* M0 q" C#define S41 6
/ A3 S5 k% H) l, s#define S42 10
#define S43 15
#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
, i0 M5 W0 D: R8 R( Pstatic 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));
4 g, Z. C* ^" r( r& m5 ` N! H, g% G; Cstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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. X) z- r: W; u, ?- E# g5 |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
7 e1 l" {8 S# Q0 q0 w};
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/* F, G, H and I are basic MD5 functions.
*/
8 Y {7 W& ~9 D% P: N2 y5 q#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
: A; v% ~- o+ t, | F0 q( ?+ ]#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
" k, p6 G) X0 s5 w: L0 D# m |/ D#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
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8 \: O6 N0 {2 F1 w8 G6 {3 G/* 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.
*/
1 w6 F* e/ l8 x7 }2 d5 Z#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
$ U% x: F( N5 E4 {) [+ H& j#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); \
}
" p6 Z d+ h, K* L+ K#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.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
$ g1 I. ^# R- G! l$ w% z*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
8 E9 W/ U! Z; u E}
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+ E" B& Y# D( ]9 k+ ^0 p* {) F o/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
s6 ]* }. `( ~; w" W7 H0 }MD5_CTX *context; /* context */
1 [: e- ^0 x; D% n5 iunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
* M8 z7 x/ t, Z/ |1 c7 P{
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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