md5加密算法C++程序

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#include "global.h"
$ A" y$ Q. b0 M) g: v9 n$ ?6 @#include "md5.h"

* W& R1 s6 v" i9 z- {5 v4 D9 U1 n/* Constants for MD5Transform routine.
*/

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#define S11 7
; J4 q- Z+ c( D4 m4 S#define S12 12
/ ?1 } ?! ~% s5 s#define S13 17
#define S14 22
5 H* i s8 L3 A! i- h) K#define S21 5
#define S22 9
4 N6 E* I) ^% M I0 P7 K T#define S23 14
3 n" }/ z; Z6 F1 }& b T) n. l4 P#define S24 20
#define S31 4
#define S32 11
J- I. k2 \% M! n) ?2 N#define S33 16
1 ^$ K( Q; ?, j* N) Z8 I& j9 O! n#define S34 23
' C' |8 t8 D& ]0 W6 H#define S41 6
#define S42 10
#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
- F+ p" m0 v# g7 }static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
+ N5 z' C- u% R! I5 U+ X# jstatic 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));
7 [( f2 ]4 x* D0 F7 N g9 w
* ]" w' e" T C0 bstatic 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 {4 m7 n8 Q+ A* }1 N6 O};

/* F, G, H and I are basic MD5 functions.
*/
; K7 C! t) ]" |8 f M! C2 p8 F8 ~#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
% g6 \9 r; P- T3 I#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
1 M' B& y, f/ A! E; d( f# P$ f, t" _0 e#define H(x, y, z) ((x) ^ (y) ^ (z))
. ?8 a* R. ]5 k6 |& w5 `#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
' |) ^, E/ X9 w- @#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
( o# ]" C; ]+ {# P
/* 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); \
}
#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.
*/
, k4 k& J9 C9 S2 f& Vvoid MD5Init (context)
MD5_CTX *context; /* context */
1 p1 y0 B$ R x{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
! J! w) b% i/ @: t2 R! B*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
& @% n0 m( E! w& G1 {- @' V N) t}
* U# ?: o3 u, H
9 t+ p2 ?6 ?( N$ s, e5 n' z/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
* e7 B6 \# P) j E' \1 ^void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
( L5 J8 E2 R7 K/ z+ l ~3 O6 |unsigned int inputLen; /* length of input block */
( U$ V/ Z$ }7 ^7 ?{
unsigned int i, index, partLen;
6 Q* ^: H' ?- W/ p5 k% {
/* 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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