md5加密算法C++程序

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

( T# ]4 r- H/ `' a1 B5 }$ r/* Constants for MD5Transform routine.
*/

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#define S11 7
#define S12 12
; t3 z9 T# ?! v4 z1 g# d" n#define S13 17
* }! S7 p; ?" @2 W3 z#define S14 22
6 x+ R, i8 z0 z4 o: H! }) _#define S21 5
#define S22 9
#define S23 14
#define S24 20
8 T2 e4 T+ X( [- ]/ k#define S31 4
#define S32 11
#define S33 16
% A- \7 y% j# `8 e" u2 X3 G% m9 T t#define S34 23
4 P; ~- R3 L1 j5 h& X#define S41 6
#define S42 10
#define S43 15
1 ], p: V1 ^; ?+ j* Y, ^#define S44 21

2 E+ r' ^" N) r( F' Jstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
/ f& @$ W0 k/ S( f5 N4 Cstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
+ Z1 Q& k8 d# |7 Tstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

, Y+ O7 X5 X+ f7 i- D 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
- u4 E+ A+ z, c8 g h};
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/* F, G, H and I are basic MD5 functions.
*/
6 j9 _ R1 W! g2 E' A+ G9 \#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
* Y$ W% r+ S4 u( t4 {% l3 A; n1 ~#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
w* B; R4 @; Q% n6 D#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
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4 c i9 c' r( J/* ROTATE_LEFT rotates x left n bits.
*/
/ Q1 W( f2 X$ c- m2 ?#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

) }0 {3 ?4 u2 ? o/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
9 w5 M! T, H- ]3 a% YRotation 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); \
}
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) K& t4 a m5 p3 S3 V8 D/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
+ _8 R& `. Y: t( b*/
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.
*/
, E) p0 m8 N5 E+ U. Evoid MD5Update (context, input, inputLen)
1 ^5 ?% I3 i* F! d3 hMD5_CTX *context; /* context */
unsigned char *input; /* input block */
8 ]$ z# Q {, d5 K" aunsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
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/* 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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