md5加密算法C++程序

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#include "global.h"
- N7 E) S. S3 {4 V! g8 t* Y5 s0 X#include "md5.h"
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% i" A/ |( X4 z3 f+ P/* Constants for MD5Transform routine.
*/

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#define S11 7
#define S12 12
# N- a! G4 T2 u1 o7 L1 v* @#define S13 17
#define S14 22
0 U \$ D$ p: j$ |: W& }#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
5 g& G3 B1 {7 N# A# T) x9 y7 F#define S32 11
6 P+ y8 z" T8 O u1 B+ r: `#define S33 16
3 o7 ?2 |) P# i) \: P#define S34 23
#define S41 6
#define S42 10
4 Y. V; h: w3 d#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
1 e$ O7 ]5 M X4 g" N, H3 X4 x; qstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
6 P& y3 Z# \8 ^ A* M/ M; Y+ Ustatic 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));
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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
v3 ]- B0 u2 i, V8 x* M};
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+ J' ?. e& |6 A0 v4 y/* F, G, H and I are basic MD5 functions.
*/
/ P, x3 L/ S2 j; s% s3 Z#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)))

7 U; c9 V# k3 ]& u3 |/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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% i J6 U9 E7 G& ]" O, D/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
3 z. S. g# C5 k; a- i g9 rRotation 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); \
}
/ K" o& T7 b) Z/ N7 h4 h P X7 X#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
+ J; |% W5 f% 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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( n0 z. ^7 I6 E! E( }/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
4 u/ v, X6 S3 V& c* Q5 OMD5_CTX *context; /* context */
7 U1 D2 F% \) ~{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
1 m9 j8 a% M) s- J+ F8 m*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
* I9 {. S r/ |* eunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
9 w9 J0 k4 ?$ p! f; L+ T. z{
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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