md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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{2 T' J# p2 ^+ p/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
$ e9 B- }) t' y0 k6 l$ a% d; O$ g#define S22 9
7 f. c' {& H! h0 l/ ]# Q& D#define S23 14
" H$ q; m. J7 q9 y$ V#define S24 20
#define S31 4
#define S32 11
#define S33 16
7 _: J* l/ N4 ^4 e#define S34 23
#define S41 6
! A! H6 d+ K. L) G" E6 M2 I#define S42 10
#define S43 15
#define S44 21
# x7 i- L* w( [ m
# F# Z; s' ~. z6 Q) e+ y, R! ~static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
7 x: e+ Z' R- x% Vstatic 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));
6 }! Y- f/ ?+ Ostatic 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
};

# e( k0 v; c7 v( X9 A# E4 R/* F, G, H and I are basic MD5 functions.
*/
0 q: s& V$ q2 n#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
, r) a; a$ s6 y; @, v. p#define H(x, y, z) ((x) ^ (y) ^ (z))
1 N* @0 x+ l4 M& V( G#define I(x, y, z) ((y) ^ ((x) | (~z)))

8 o3 H: W. \6 q( E7 {/* ROTATE_LEFT rotates x left n bits.
*/
9 n/ L. s5 u6 V5 X! @#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.
Rotation 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); \
}
6 I$ M) G6 ], i1 G( c8 d) z: `#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); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
) O; H, B8 F9 E8 K }3 ]0 }$ N; u- Svoid MD5Init (context)
: }0 t8 p8 x& l1 ^ @MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
! j5 P9 T/ v a) x, U3 R*/
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.
*/
+ c- C& s' h' O3 W* s5 ?% Evoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
. v/ n* j! ~# [! q( I! Munsigned char *input; /* input block */
" w+ ]/ u- b' e; \unsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
& V" `, C: b7 k; K0 a$ d
/* 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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