md5加密算法C++程序

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#include "global.h"
' {1 X" C( B j) G* _5 K#include "md5.h"
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0 S, `$ ?* U( t* [/* Constants for MD5Transform routine.
*/

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9 f# D, i: F% v. M#define S11 7
#define S12 12
3 F, Z1 A* ]8 ~# u' ?* E) u: B4 ], r#define S13 17
* L& p8 \" l, e2 D#define S14 22
( _' \6 V0 S) D6 U. b4 O#define S21 5
3 h; w; K7 ^2 S; M$ ^#define S22 9
#define S23 14
#define S24 20
# _1 Z- j7 u) [. l/ a+ ?#define S31 4
* I @; ~8 l1 L7 }: \#define S32 11
#define S33 16
#define S34 23
#define S41 6
) }( t/ d' ~* _1 T# c4 D ]( t#define S42 10
#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
2 `% d2 a& Y# r8 ~$ ~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));
static 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
};
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0 m/ u! I6 j. `3 c) T/* F, G, H and I are basic MD5 functions.
*/
0 B4 U2 v; Z8 g3 R#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
1 K1 W( J$ g. G1 N0 r1 I#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
2 i5 D' g, K- Q- s. t#define H(x, y, z) ((x) ^ (y) ^ (z))
( f, @! X: Y2 ?+ T4 a. E5 a) ?4 x#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
7 K# \- u$ h! C b#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
+ y3 N [3 l, d" {
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
- P8 K3 D( s. A. I5 Q# L#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); \
}
& u. z2 w; I, J8 i- \, k2 ^9 \" X#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
) X. Q! j& m, i# m) s#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)
1 q$ |; b" L, Q4 T$ I- w- xMD5_CTX *context; /* context */
& c3 r$ E0 D/ k' Z{
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;
}

, i1 e }, @1 d/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
+ ^/ i" k9 l5 Xunsigned int inputLen; /* length of input block */
5 S! ?4 E2 q6 V6 r$ R2 R( m{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
; L9 l- g, W4 E
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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