md5加密算法C++程序

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

. w4 @/ f( A9 z& C/* Constants for MD5Transform routine.
*/


& l: t9 y1 L9 `#define S11 7
# Z/ l( c f# _" G6 b, c#define S12 12
#define S13 17
#define S14 22
6 y' L1 U. X3 Q- F! I#define S21 5
#define S22 9
4 T8 J% S0 Q. o% G( b#define S23 14
6 U1 F' t3 `- s, }1 a2 A8 k#define S24 20
1 d$ E) A! L% J7 `- j L#define S31 4
#define S32 11
2 _# D8 Q( n* z#define S33 16
' e+ u6 X j- X1 u$ W) s8 A' S#define S34 23
#define S41 6
# g3 C( G5 t9 Y0 a#define S42 10
#define S43 15
# v* N% }9 z; k6 m" {& l# Z* V8 w2 f#define S44 21
# H- Q! @8 }- V3 M
static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
: Q. n( c3 K; M9 zstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
! ?" d1 l) j" z7 \% f. Qstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
( m6 W5 @% Z/ ^. j8 R3 A8 Y1 ~static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
2 F& q: w( u; s; cstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

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
- e7 _: o& H) W6 t) ^& w% M+ t};

/* F, G, H and I are basic MD5 functions.
*/
: V" h; K1 f8 D& m$ U#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
/ D" \' r, l4 v#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
+ {* P7 `1 G' O#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

2 E+ D/ L, _, s/* ROTATE_LEFT rotates x left n bits.
*/
. _+ M. g. S5 G0 K#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
' d1 f/ I6 x' w {$ `7 y$ L% C" g7 j
/* 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); \
}
! N. } O0 `9 F( R#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
2 m+ y. t8 K! n3 R#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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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
# M' B9 H F% w1 x$ P- }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;
}
# O6 ?- u! h# n
/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
6 l0 K- {' p* h0 G) x, ~void MD5Update (context, input, inputLen)
! L' U" B0 F: c j. L. zMD5_CTX *context; /* context */
J1 P5 n4 Y, u5 y$ f r+ S7 [% cunsigned char *input; /* input block */
2 c# {- ~7 r9 a& }; k f0 x# vunsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
! d# p6 C, u, f) ]+ D
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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