md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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0 B- s7 z9 t9 f5 I* s/* Constants for MD5Transform routine.
*/
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3 v0 d1 ]) t8 R+ \+ s#define S11 7
& ~/ L6 b) Y, O9 {/ Z#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
' S8 w& h! f( k1 E. Q `#define S24 20
( Y. b$ |, {( c. R J#define S31 4
3 K9 o+ ^$ W! _; a, t* n( _#define S32 11
#define S33 16
#define S34 23
- j* T: e! T5 J; i- J% @#define S41 6
#define S42 10
; h. r$ `8 H- F8 }+ K* O#define S43 15
#define S44 21
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: \( c( x9 H. B: Kstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
" K7 ]( a! I7 U8 d# ^, u; Cstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
# \4 _- f6 M8 ?, d" M: w4 g/ Sstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
; X9 e9 u" C% istatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
* p" e/ a# u$ D. {
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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* ~- ~9 E& T' g z2 B6 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)))
$ x0 t% }/ P4 m#define H(x, y, z) ((x) ^ (y) ^ (z))
# G+ e9 A. y$ O( f#define I(x, y, z) ((y) ^ ((x) | (~z)))

3 a) R6 o0 ]( p# P: E/ E; A/* ROTATE_LEFT rotates x left n bits.
*/
9 w' ^- L" t; f5 F- v7 k#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
+ u5 J0 E! b1 d0 {% S#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
! X6 c& i$ p5 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); \
}
/ }- _7 T" q+ I8 C- e#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); \
}

/ z& z7 _9 p. n0 k0 j$ i" ~' i/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
* ^& j1 W% Z$ e! W& ^. Q; [+ kMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
; T( l7 d9 J& I* k# m0 a4 O6 U*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

5 l' h: _7 w2 N5 S) U" u' M/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
" D' l2 f$ X# T$ i% e) [9 a# c2 MMD5_CTX *context; /* context */
unsigned char *input; /* input block */
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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