md5加密算法C++程序

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#include "global.h"
* p* O+ D9 V, B; C6 O3 \#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
* m8 h, u; r; M! Q$ T+ x7 X- O#define S13 17
F7 @- ^; F9 f! O1 q! ^* l#define S14 22
3 X, Z/ y, t! Z#define S21 5
% L- r8 A; b! p6 R; W& m#define S22 9
#define S23 14
#define S24 20
7 E3 P- B0 f4 K' P! b3 X#define S31 4
#define S32 11
7 U7 t5 X! P& K#define S33 16
#define S34 23
#define S41 6
: @4 U: D& l. W2 R#define S42 10
#define S43 15
#define S44 21

: \6 e4 P9 l# |% i" ]- ostatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
$ _% c" j% S! G& W+ Q4 Dstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
" b. Z8 X4 |- mstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
9 {5 E# c0 E% D2 ?! H+ m7 Jstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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! u6 Q) k& O; B8 h7 O( h, V) Ostatic 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
4 o0 g! T: x* C* j9 }};

7 R# p! k1 d z+ [8 \/* 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)))
, O: v6 M. y, n3 ?5 n#define H(x, y, z) ((x) ^ (y) ^ (z))
$ f- A, M" a$ v( l#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
0 r- j1 o. N" Y' V* g& B, P/ V' }; q) _Rotation is separate from addition to prevent recomputation.
*/
; E& K7 v! n/ ?7 q 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); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
# e* [- z. k2 U7 T: |! ^- F, J#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); \
}
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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
, c. V- k# f! O$ k3 kMD5_CTX *context; /* context */
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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;
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3 H$ Q# x" H9 c0 R9 M9 z7 @; X/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
, P: ?; l0 b% o6 eMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
* C! ?4 u. m4 d9 P{
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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