md5加密算法C++程序

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#include "global.h"
/ \ w2 q9 X7 i) S8 {: I* x#include "md5.h"
0 _5 C0 G8 {' l, C
/* Constants for MD5Transform routine.
*/


#define S11 7
#define S12 12
0 O; h. w$ n C& }% R#define S13 17
3 O* X2 ~- M1 R' Z0 j+ {- S0 d7 O8 L#define S14 22
& j6 z6 [( u+ u% c% }7 \#define S21 5
0 E+ O+ i, `, I& V#define S22 9
#define S23 14
#define S24 20
#define S31 4
4 g" A0 v! `8 R3 W# H* t#define S32 11
#define S33 16
6 W' P. x4 X4 s. y2 u- y#define S34 23
! c% C: i4 p3 S% `) F# H#define S41 6
s# Y v1 B' b9 L# o% H#define S42 10
#define S43 15
#define S44 21

6 \$ {( z0 k- b4 w( wstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
' D+ u- v" G5 p: Pstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

; V% ~7 f! v9 G1 b" @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
( I+ N7 X5 v+ j' X+ ^};

/* F, G, H and I are basic MD5 functions.
*/
- j* J" s# E) o# n' N#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
4 I h. c. J) j( O2 \) ]; a# J9 v#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
$ ^$ j: K' i8 p8 I: [9 X#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

) _7 h5 [3 _0 @& b5 p6 G7 V# E/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
. _( E0 L2 R+ B1 t
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
4 n' ?+ h/ ^4 X3 f3 VRotation 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); \
}
: J* U6 f" z0 B9 g9 H8 J#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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/* 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.
( h6 [$ O2 B4 I4 A$ {- B*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
) H1 O" @. H( |. n. d}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
8 }& _1 Z0 o7 n8 G" Wvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
; X4 G1 w! P% D6 @7 ~unsigned char *input; /* input block */
unsigned 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);
, T7 P+ D* d2 n( c- W- Y G
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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