md5加密算法C++程序

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#include "global.h"
$ C6 U2 d) N- @) ]0 p# c" J" O9 w3 [#include "md5.h"

/* Constants for MD5Transform routine.
*/

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#define S11 7
0 I. W$ N% s$ V5 E& Z& P#define S12 12
#define S13 17
#define S14 22
( }0 e% l3 x( }8 @7 T#define S21 5
#define S22 9
" Z3 d0 b+ l$ Y- L; O#define S23 14
#define S24 20
; W$ u+ f* ~: n7 r#define S31 4
5 y6 w! o$ B" D: ]( E2 |0 A0 G#define S32 11
( l) v/ B- o3 S* H3 ?#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
7 ]5 }; V7 U. R% u#define S44 21

! k. \& k/ c* C6 c: z! y3 bstatic 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));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

$ m7 r+ b+ x0 M: S% G4 f$ {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
& o, O% k: u/ |& }};
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( _$ L+ h, _/ d9 x/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
3 f0 `+ e2 t4 U) H$ Q- Y$ F$ T#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
. B3 z( f% F8 M$ z( ?#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

7 } g9 y, v; o; R* ?5 I& |/* ROTATE_LEFT rotates x left n bits.
*/
4 L6 \. V2 D, `% \ C* g#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
8 l- }# ? O" f0 Z+ g+ y+ MRotation 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); \
}
/ I, @+ ^. p# j# {& k' n8 u9 ]#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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8 L* W% O S" v7 x5 \/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
+ H# \; d9 P4 U; C5 D( bvoid MD5Init (context)
9 o9 w# y! d. r& }% VMD5_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;
}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
8 O/ J4 T) z: _3 C& SMD5_CTX *context; /* context */
+ l: |9 A, C- Bunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
, o! l+ _6 S& Y) S: 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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