md5加密算法C++程序

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#include "global.h"
#include "md5.h"

- c* A/ j* |) x8 Y2 @+ J' @1 M/* Constants for MD5Transform routine.
*/


#define S11 7
#define S12 12
#define S13 17
- V) t; g( e% s) i' d#define S14 22
#define S21 5
#define S22 9
, K* F: M7 p8 ]# l+ A#define S23 14
#define S24 20
#define S31 4
* {3 I0 e- s S7 ~9 R; v#define S32 11
#define S33 16
#define S34 23
#define S41 6
# S) \, l B. V- ^4 L' k% s: l: v#define S42 10
#define S43 15
#define S44 21
2 R# |7 d% {* l3 R% ]
static 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));

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
0 Z1 }$ Q* t5 g7 j};
3 c$ Z. y/ b8 C, |* Q
/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
# b' h- I6 ]- K4 \& x. {' k#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
% t. K2 |% [6 f6 P# ^1 w& e#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
/ t" H- ]& Q4 T* ]6 S P! t& B
. \: U4 ~( {& F' X# }, j/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
1 \0 v, J2 ]$ j) r8 _/ ?3 R' JRotation is separate from addition to prevent recomputation.
*/
! j6 k5 I; R+ N4 U#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
4 q0 e; U5 f) v2 c( {, f- R#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); \
}
3 H. N% J) M+ d. E1 U) V* ]#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
, \& O* u5 C- t, s0 Y5 O: Y, f
& V V! X5 C2 Z. {% f/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
9 e) D0 ?5 ?3 {void MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
) M/ z- k1 Q7 a: z. u*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
1 n* B" r% O8 \/ a}
9 U R$ b7 H7 u
$ V$ y/ v1 M- U. y7 u" i/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
R( [4 g' f5 |. n! v0 [void MD5Update (context, input, inputLen)
0 G! U3 H! m, c9 _! KMD5_CTX *context; /* context */
unsigned char *input; /* input block */
5 y2 ?8 k) L$ lunsigned int inputLen; /* length of input block */
2 d5 R X1 D# z" o, K{
unsigned int i, index, partLen;
0 F k4 N: K% w+ d2 S' T% x
/* 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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