md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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1 p/ Z1 K3 O5 F1 c#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
# H7 L# n# u* @" b6 X1 t#define S22 9
* s4 p( l* p8 @9 H. W' i9 Q#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
, r. a- W4 s- ?4 O#define S34 23
#define S41 6
: \* i4 D7 S, P( n#define S42 10
4 X9 S4 S% y% M4 h/ l# E#define S43 15
, _2 }9 J3 S. N#define S44 21

8 s& o- @7 [+ a6 rstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
8 ?3 ]! V, [1 C- I' p7 s/ O/ qstatic 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));
! j3 T# l7 D8 ^static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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9 \* k7 c) [! [. r! h) L) }! \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
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/* F, G, H and I are basic MD5 functions.
*/
: ?1 @! ]- q) Z8 u( i+ @1 @, K$ }#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
3 s7 S* z" W+ u( u* q' j+ y#define H(x, y, z) ((x) ^ (y) ^ (z))
2 ^. ^" N4 ~& S3 T* a& K% {#define I(x, y, z) ((y) ^ ((x) | (~z)))
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9 y4 G" p6 ~% m& J6 Q, y" V" O, c/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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& H) P) \5 X: J! \, ?" q1 X/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
+ y" ]6 f5 }8 ARotation is separate from addition to prevent recomputation.
*/
% r* X& I7 {' V4 X#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
' O# f" q i6 V" m#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); \
}

4 E+ N5 F% W6 z% l- e9 P/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
0 ~0 C' u7 V" h! P; Xvoid MD5Init (context)
MD5_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;
1 X0 _# @# T' r; D) y}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
0 F/ C( }: q# ^! E7 ivoid MD5Update (context, input, inputLen)
1 S6 m, L: C% o5 R7 @5 GMD5_CTX *context; /* context */
+ t, \- u7 t3 O4 I# v3 Cunsigned char *input; /* input block */
4 `7 w$ B! r& F; {unsigned int inputLen; /* length of input block */
{
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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