md5加密算法C++程序

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#include "global.h"
#include "md5.h"

: f$ {- S8 O* v6 Y* [/* Constants for MD5Transform routine.
*/
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#define S11 7
% a- J3 s: Y2 |0 R/ D/ v5 S#define S12 12
#define S13 17
2 r# ]. j. y+ z4 U#define S14 22
4 F9 i/ t/ h$ {0 @$ |# ]#define S21 5
. T; l# Z! M* z8 _5 y: J#define S22 9
1 S/ `% a+ E% ?9 J/ C#define S23 14
8 J. ~! G. ?( ~& `#define S24 20
#define S31 4
#define S32 11
# j# A. R. |. q#define S33 16
; G: `! C1 h0 E#define S34 23
#define S41 6
#define S42 10
#define S43 15
. A/ F6 Y$ j3 A8 ]. K' K1 `$ ~#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
7 `0 u* l* N$ p9 |static 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));
$ ~+ W: _) P5 T" n0 k$ \ W8 R2 a5 dstatic 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
};

/* F, G, H and I are basic MD5 functions.
*/
& L3 P# _2 K0 t! O$ s+ `#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
) I. s7 F3 b& J v! [#define H(x, y, z) ((x) ^ (y) ^ (z))
2 N! H4 |' U$ n) s, y#define I(x, y, z) ((y) ^ ((x) | (~z)))
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N1 ~! I2 @4 P9 B, L/* ROTATE_LEFT rotates x left n bits.
*/
6 \; t9 t/ v6 B; g2 B#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.
* {/ y+ S& J- D5 k) ~4 zRotation is separate from addition to prevent recomputation.
*/
6 |4 e, R: i1 B/ v) E0 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); \
}
4 z) W+ n h/ E+ }; 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); \
}
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. Z% j- @$ w+ f( {1 R0 A/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
2 R" i' K; b% O( R7 a( a# |5 n" V. Evoid MD5Init (context)
0 V7 v% ?! Y/ c. E# L! dMD5_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;
}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
; i0 ?6 W1 l/ W6 s# F/ xMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
9 V% U# X0 e0 l, O2 t, a& z, t{
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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