md5加密算法C++程序

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#include "global.h"
6 _( e+ m3 Z- C& [6 e% C#include "md5.h"
* g/ ?% c- T7 A3 @1 L5 J: V
/* Constants for MD5Transform routine.
*/


#define S11 7
# q: v, ~6 ^! M2 S( e#define S12 12
0 P# R* a+ W( t$ U6 u#define S13 17
! l+ _. Z+ v( g#define S14 22
, ] e# G/ r6 X% r#define S21 5
4 `2 z9 t2 X& ~/ i l% I#define S22 9
#define S23 14
3 o& ? G, ~6 T6 i+ f0 [" F: f#define S24 20
5 l" v) V6 g p#define S31 4
#define S32 11
#define S33 16
#define S34 23
1 B. Z0 ?$ `- q9 O#define S41 6
#define S42 10
#define S43 15
2 ~; c4 t/ R' P/ w/ N#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
q: \: e: p4 q. {/ Y- ^static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
* F- |" `0 a1 w. T: Nstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
3 |' ~: P5 W6 Rstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

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
6 }& D4 ~: p3 _8 i) K& [4 ]9 g1 W};
. B6 {4 \* A* G/ g
' E8 c) U S+ r Y# A [4 q/* 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)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

( D ]# p# Z. }( D8 S$ g/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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1 g9 B$ T' O: X4 u/ h6 y/* 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); \
}
% v& G/ C3 A% x) E#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); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
& ^( C; Y/ z/ B! Z" tvoid MD5Init (context)
T: v4 v" i) ^: FMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
0 N/ l( J% t& f+ _*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
# c" h i" p6 s) v
0 k* _) V3 G, T- r/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
1 j$ @. N" F2 G& a: M$ Svoid MD5Update (context, input, inputLen)
& o3 m& B5 @/ N MMD5_CTX *context; /* context */
( ?9 E# [% w6 s ounsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
2 @3 [3 z+ l4 C{
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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