md5加密算法C++程序

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#include "global.h"
0 K" I0 p3 ]! N. ^5 }- g' c) ]#include "md5.h"

& ?8 g* G* l. h/* Constants for MD5Transform routine.
*/


#define S11 7
- R2 I& q+ G! ?* f' i* X#define S12 12
#define S13 17
#define S14 22
* J9 Y! z: e0 I& ^#define S21 5
3 J1 D8 G4 E: L8 I2 s% |5 Z% N7 ^8 x#define S22 9
: A# }3 Y2 {2 M5 q. d#define S23 14
#define S24 20
#define S31 4
#define S32 11
1 i6 j: w, X6 i6 s#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
" u8 e. n4 w$ A#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
0 [/ [' ~% P M. r# B [# nstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
1 X" r' b! F+ u" lstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
/ _% W, v; @; E1 t; ostatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

: R( G0 \- R0 mstatic 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.
*/
( i- o9 B/ H @' j* w#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
' d& e7 |# \ r#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
& h0 P; M: i0 ?1 \$ l3 ?+ n6 U+ u
7 A, P8 k& S0 }' M/* ROTATE_LEFT rotates x left n bits.
*/
#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.
*/
- j, A+ J# N+ r& q* }$ G#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); \
}
D' G- }4 X/ U9 ~/ c R9 g
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
# ?' \- h; v0 [+ D2 u# Q% b$ E! Mvoid 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;
6 ~; h% W l2 l8 ~& A1 F}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
# \/ `" F# C: ~void MD5Update (context, input, inputLen)
# R6 ]- K/ @6 ~: Z$ {MD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
6 N# i+ b: q. K2 }. m{
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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