md5加密算法C++程序

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#include "global.h"
# o) X" e0 M7 ]/ r#include "md5.h"

/* Constants for MD5Transform routine.
*/


+ a+ Y& {: d! Q- @. i4 ?2 d#define S11 7
2 t+ k7 X! Z/ B o( M#define S12 12
$ p, \( y& _/ u5 Y+ S6 h2 u" _# H#define S13 17
5 t$ s7 u& G& A: p8 L# U0 k#define S14 22
" l* n( B7 K) _, A- {% [9 Z9 b#define S21 5
#define S22 9
6 l* P* ]. M3 K$ o#define S23 14
9 d8 Q: Z: \" ?4 S0 y#define S24 20
" Y# d. w1 r! u#define S31 4
#define S32 11
5 \8 N- s' B1 O) _- \#define S33 16
* w/ M. X) M& V5 [; I. z#define S34 23
& y; K+ l, W* k0 M3 o- Q; k#define S41 6
. Q' z3 V0 l" |, `" g#define S42 10
#define S43 15
#define S44 21

: V! u, k* ^: D! E5 |static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
0 \5 v* I) l$ Zstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
( k2 U+ }' F$ S) { A- H' ostatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

. j' E) n' I' F$ A/ Q0 i4 Ostatic 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
};
4 U2 y1 Y; z Z0 }
/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#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.
*/
' A* }5 {- t, ?! s9 \& t#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* 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); \
}
#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); \
}
) N) x' Y. P t. N, Q4 K/ P#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

9 i2 O! r1 M' ]' u% ~. ~" }8 D9 C/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
7 z$ a8 a* P" F{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
6 [7 A) a1 K6 l% _*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
1 h' q! S' m r" @}

% L! h% m5 o' b1 Z/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
+ G$ k2 E: g7 H- ivoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
" B% X7 V; e% ~# r1 B6 V0 S1 Ounsigned int inputLen; /* length of input block */
# O4 A" V1 D3 S5 T% h{
unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
- m' g2 Z7 R9 y3 P0 w$ C1 g
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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