md5加密算法C++程序

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#include "global.h"
3 w' ~8 T" ]$ D" b#include "md5.h"

/* Constants for MD5Transform routine.
*/
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( y8 a8 _! M! ^# J `9 e0 h0 S, `#define S11 7
#define S12 12
#define S13 17
& Z8 i# _2 U+ G7 V; R#define S14 22
#define S21 5
8 p2 O, f/ m6 a& `. N; s3 t/ T#define S22 9
. ?/ _8 y `% |( k( [#define S23 14
#define S24 20
, G9 M N: b* ^% A. t3 }#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
, f; i5 c5 m, K8 |9 t#define S42 10
#define S43 15
2 G1 K3 @( j& @& c2 O$ Y+ Q#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static 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));
v7 [& j! f9 r3 Xstatic 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
# U9 i7 W5 d% _};
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/* F, G, H and I are basic MD5 functions.
*/
. ?/ X- y$ J9 i3 w#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
( V3 W1 c0 H6 A* P( O5 X2 g1 U#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* 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.
! x/ n8 p& T( _- }) d( NRotation 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); \
}
/ D& M- m+ ~# F: Z9 b5 M#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
1 R4 c2 v) K) T( j" J( t#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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" ?- E" t6 w" O" A* |, d6 }# P/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
4 Q$ }" x# F0 m2 B0 i% x- V{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
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context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
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+ S, t: t+ Q6 S9 }4 N N, [/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
! }9 X7 F( t9 U. F; L/ x! N2 ^: @void MD5Update (context, input, inputLen)
4 l& x( ?* o q& WMD5_CTX *context; /* context */
unsigned char *input; /* input block */
! m6 t E( G' t, bunsigned 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);

/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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