md5加密算法C++程序

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#include "global.h"
! Z0 e' c- K" L8 l) N+ p#include "md5.h"

, _' R. z( I; h" r# [7 v. o/* Constants for MD5Transform routine.
*/

; W3 e3 c j/ ]" I- |2 U6 r
#define S11 7
( ?: t0 a: {2 H8 ^5 d1 ^* g2 l#define S12 12
#define S13 17
# O' t) t; ]; ]' U#define S14 22
#define S21 5
#define S22 9
#define S23 14
: T9 x9 ~' @. u#define S24 20
; D, W& j- ]2 A( |9 X" }8 g#define S31 4
#define S32 11
#define S33 16
#define S34 23
# _/ K1 q8 S7 ^4 H) i, z#define S41 6
#define S42 10
#define S43 15
#define S44 21

$ i% S; {8 F" i Y$ `/ Fstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
+ S$ w4 q; ^! r5 ]0 Rstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
9 o. z$ Z6 D2 H' U4 ]6 h) astatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
" `2 a; {; ?% j- |7 kstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
8 H2 ^7 k" ]' N( L0 Lstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
# [; j- p8 O& j0 \
7 }" C1 D) g$ b# B8 U! Nstatic 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
};
) G2 J ?+ ~/ k$ d6 ?
/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
3 c/ O/ C7 D1 f' {#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)))

/* 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.
" |/ r. [; C' Z5 j8 zRotation is separate from addition to prevent recomputation.
*/
$ I/ h* H$ }3 D& D9 L8 t#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); \
}
. B! B0 E. H" @2 M- _#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

/* 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.
! e( r2 R; F/ F, B7 G9 O: C*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
& z+ p7 C( d' E! q6 S7 o, n
) b; X/ X" _& t% s& v- s7 V& _7 J/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
, `; ~4 V- i5 U, {* NMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
) y! j! q1 m+ b# w{
unsigned int i, index, partLen;
7 p! ]( D) z4 K1 Z2 S. L) @
/* 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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